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HomeMy WebLinkAboutDRC-2011-002211 - 0901a06880207e86DENISO MINES Sent VIA Federal Express February 28, 2011 Mr. Rusty Lundberg Co-Executive Secretary Utah Water Quality Board Utah Department of Environmental Quality 195 North 1950 West P.O. Box 144820 Salt Lake City, UT 84114-4820 2oii-gjU?ii Received MAR 2011 Division of Radiation Control o ..I -I >i / Denison IMines (USA) Corp. 1050 17th Street, Suite 950 Denver, CO 80265 USA Tel 1303 628-7798 Fax:303 389-4126 www.denisoninines.com Re: Transmittal of 4th Quarter 2010 Groundwater Monitoring Report Groundwater Quality Discharge Permit UGW370004 White Mesa Uranium MIU Dear Mr. Lundberg: Enclosed are two copies of the White Mesa Uranium Mill Groundwater Monitoring Report for the 4th Quarter of 2010 as required by the Groundwater Quality Discharge Permit UGW370004, as well as two CDs each containing a word searchable electronic copy of the report. If you should have any questions regarding this report please contact me. Yours^vpry truly, DENISON MINES (USA) CORP. Jo Ann Tischler Director, Compliance and Permitting cc: Ron F. Hochstein David C. Frydenlund Harold R. Roberts David E. Turk Katherine A. Weinel Central Files DENISOJ)JJ MINES Sent VIA Federal Express February 28, 2011 Mr. Rusty Lundberg Co-Executive Secretary Utah Water Quality Board Utah Department of Environmental Quality 195 North 1950 West P.O. Box 144820 Salt Lake City, UT 84114-4820 Denison Mines (USA) Corp. 1050 17th Street, Suite 950 Denver, CO 80265 USA Tal: 303628·7798 Fax: 3033894125 www.denisonmines.com Re: Transmittal of 4th Quarter 2010 Groundwater Monitoring Report Groundwater Quality Discharge Permit UGW370004 White Mesa Uranium Mill Dear Mr. Lundberg: Enclosed are two copies of the White Mesa Uranium Mill Groundwater Monitoring Report for the 4th Quarter of2010 as required by the Groundwater Quality Discharge Permit UGW370004, as well as two CDs each containing a word searchable electronic copy of the report. If you should have any questions regarding this report please contact me. ;p;;~ DENISON MINES (USA) CORP. JoAnn Tischler Director, Compliance and Permitting cc: Ron F. Hochstein David C. Frydenlund Harold R. Roberts David E. Turk Katherine A. Weinel Central Files White Mesa Uranium Mill Groundwater Monitoring Report State of Utah Groundwater Discharge Permit No. UGW370004 4th Quarter (October through December) 2010 Prepared by: Denison Mines (USA) Corp. Suite 950, 1050 17th Street Denver CO 80265 February 28, 2011 TABLE OF CONTENTS 1.0 INTRODUCTION ................................................................................................... 1 2.0 GROUNDWATER MONITORING ....................................................................... 1 2.1 Samples and Measurements Taken During the Quarter ....................................... 1 2.1.1 Groundwater Compliance Monitoring .......................................................... 1 2.1.2 Accelerated Groundwater Monitoring .......................................................... 2 2.1.3 Background Well Monitoring ....................................................................... 2 2.1.4 Parameters Analyzed .................................................................................... 3 2.1.5 Groundwater Head Monitoring ..................................................................... 3 2.2 Field Data ............................................................................................................. 3 2.3 Laboratory Results -Quarterly Sampling ............................................................ 4 2.3.1 Copy of Laboratory Results .......................................................................... 4 2.3.2 Regulatory Framework and Groundwater Background ................................ 4 2.4 Laboratory Results -Accelerated Monitoring ..................................................... 5 2.4.1 Copy of Laboratory Results .......................................................................... 5 2.4.2 Regulatory Framework and Groundwater Background ................................ 5 2.4.3 Compliance Status ........................................................................................ 5 2.5 Depth to Groundwater and Water Table Contour Map ........................................ 7 3.0 QUALITY ASSURANCE AND DATA VALIDATION ....................................... 7 3.1 Field QC Samples ................................................................................................. 8 3.2 Adherence to Mill Sampling SOPs ...................................................................... 8 3.3 Analyte Completeness Review ............................................................................. 9 3.4 Data Validation .................................................................................................... 9 3.4.1 Field Data QAlQC Evaluation ...................................................................... 9 3.4.2 Holding Time Evaluation ............................................................................ 11 3.4.3 Receipt Temperature Evaluation ................................................................. 11 3.4.4 Analytical Method Checklist ...................................................................... 11 3.4.5 Reporting Limit Evaluation ........................................................................ 12 3.4.6 Trip Blank Evaluation ................................................................................. 12 3.4.7 QAlQC Evaluation for Routine Sample Duplicates ................................... 12 3.4.8 Radiologies Counting Error and Duplicate Evaluation .............................. 13 3.4.9 Other Laboratory QAlQC ........................................................................... 13 3.4.10 Rinsate Blank Samples .................................................................................. 16 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 CORRECTIVE ACTION REPORT ...................................................................... 17 Identification and Definition of the Problem ..................................................... 17 Assignment of Responsibility for Investigating the Problem ............................ 18 Investigation and Detennination of Cause of the Problem ................................ 18 Detennination of a Corrective Action to Eliminate the Problem ....................... 18 Assigning and Accepting Responsibility for Implementing the Corrective ...... 19 Implementing the Corrective Action and Evaluating Effectiveness .................. 19 Verifying That the Corrective Action Has Eliminated the Problem .................. 19 Assessment of Corrective Actions from Previous Period .................................. 20 6.0 7.0 ELECTRONIC DATA FILES AND FORMAT ................................................... 21 SIGNATURE AND CERTIFICATION ................................................................ 22 LIST OF TABLES Table 1 Summary of Well Sampling for the Period Table 2 Exceedances and Acceleration Requirements Table 3 GWCL Exceedances Through Fourth Quarter 2010 Under the June 17, 2010 GWDP Table 4 Summary of Analytes Exceeding the GWCLs for Two Consecutive Sampling Periods INDEX OF TABS Tab A Site Plan and Perched Well Locations White Mesa Site Tab B Field Data Worksheets Quarterly Sampling Tab C Field Data Worksheets Accelerated Monitoring Tab D Quarterly Depth to Water Tab E Laboratory Analytical Reports -Quarterly Sampling Tab F Laboratory Analytical Reports -Accelerated Monitoring Tab G Quality Assurance and Data Validation Tables G-1 Field Data QAJQC Evaluation G-2 Holding Time Evaluation G-3 Laboratory Receipt Temperature Check G-4 Analytical Method Check G-5 Reporting Limit Check G-6 Trip Blank Evaluation G-7 QAJQC Evaluation for Sample Duplicates G-8 Radiologies Counting Error G-9 Laboratory Matrix QC G-lO Rinsate Blank Detections Tab H Kriged Current Quarterly Groundwater Contour Map and Depth Data Tab I Groundwater Time Concentration Plots Tab J CSV Transmittal Letter 11 1.0 INTRODUCTION This is the Routine Groundwater Monitoring Report, as required under Part I.F.l of State of Utah Groundwater Discharge Permit No. UGW370004 (the "GWDP") for the fourth quarter of 2010 (the "quarter") for Denison Mines (USA) Corp's. ("DUSA's") White Mesa Uranium Mill (the "Mill"). As required under Parts I.E. 1 , I.E.2 and I.E.5 of the GWDP this Report includes all recorded field measurements and laboratory analyses for well monitoring conducted during the quarter. A revision was issued to the GWDP on February 15, 2011, which is after the closing of the sampling period discussed in this report. All sampling activities discussed in this report were conducted in accordance with the GWDP dated June 17,2010 which was in effect during the fourth quarter 2010. Changes associated with the February 15, 2011 revision to the GWDP will be implemented for sampling conducted after the effective date of February 15, 2011. For the purposes of this report any reference to the GWDP is to the June 17, 2010 revision which was in effect during this sampling period unless otherwise stated. 2.0 GROUNDWATER MONITORING 2.1 Samples and Measurements Taken During the Quarter A map showing the location of all groundwater monitoring wells, piezometers, existing wells, chloroform contaminant investigation wells and nitrate contaminant investigation wells is attached under Tab A. Groundwater samples and measurements were taken during this reporting period (October through December), as discussed in the remainder of this section. 2.1.1 Groundwater Compliance Monitoring Groundwater samples and field measurements collected during the fourth quarter included quarterly, semi-annual and accelerated monitoring. Accelerated monitoring is discussed below in Section 2.1.2. In this fourth quarter report, samples classified as being collected quarterly include those wells which are sampled every quarter and the wells sampled semi-annually. Wells which are sampled routinely every quarter and semi-annually were analyzed for the parameters listed in Table 2 and Part I.E. 1. c) 2) ii of the GWDP dated June 17,2010. Table 1 of this report provides an overview of all wells sampled during the current period, along with the required sampling frequency applicable to each well during the current monitoring period, the date samples were collected from each well, and the date(s) analytical data were received from the contract laboratory(ies). Table 1 also indicates which sample numbers are associated with the required duplicates and the rinsate blank sample. During this sampling event MW -4, which is a chloroform monitoring well, was inadvertently sampled for all quarterly analytes. The data, while 1 N:lRequired ReportslGroundwater Quarterly Monitoriog Report12010 Q4120 IO_Q4_ GW _Report text doc not compared to GWCLs, are included in this report for information purposes only. In addition, during this quarter, 18 groundwater samples and one duplicate were reanalyzed for Gross Alpha Minus RN and U (Gross Alpha) within the six month holding time due to analytical issues discovered during the data review. The initial Gross Alpha data were rejected from use and are not included in this report. The dates of receipt of the reanalyzed data are shown on Table 1 (in brackets). 2.1.2 Accelerated Groundwater Monitoring. Accelerated monthly sampling was also performed (quarterly wells to monthly), and results reported, for the wells indicated in Table 1. The accelerated sampling frequency, analyte list and well list were determined based on the previous analytical results as shown in Table 2. Table 1 provides an overview of the wells sampled for the accelerated monthly program along with the routine sampling frequency as well as the accelerated sampling frequency, the date samples were collected from each well, the associated duplicates and the date(s) which analytical data were received from the contract laboratory(ies). 2.1.3 Background Well Monitoring A requirement was added to the GWDP on March 17, 2008, which required the Mill to begin quarterly sampling of wells MW-20 and MW-22 to develop eight quarters of background data. A background report for MW-20 and MW-22 was submitted on June 9, 2010. The Utah Division of Radiation Control ("DRC") has determined that these wells will not serve as point of compliance wells, but will continue to be sampled semi- annually as "general monitoring wells." Additionally, per the revised GWDP dated February 15, 2011, MW-35 will be monitored for eight consecutive quarters to establish background data. MW -33 is consistently dry and will not be monitored. Per the revised GWDP dated February 15, 2011, MW-34 will only be included in the quarterly depth to water measurements and will not be measured for any of the analytes listed in Table 2 of the revised GWDP dated February 15, 2011. The requirements noted for MW-33, MW- 34 and MW-35 were specified in the revised GWDP dated February 15, 2011 and were not in effect during the sampling period discussed in this report. As such MW-34 was sampled during the fourth quarter of 2010. Table 1 indicates the sampling dates and the dates DUSA received laboratory data for these wells. Note: The GWDP dated February 15, 2011 modified the frequency of sampling requirements for MW-20 and MW-22. For the fourth quarter monitoring period covered in this report, MW-20 and MW-22 were still required to be monitored quarterly. 2 N:lRequired Reports\Groundwater Quarterly Monitoring Report\2010 Q4\201O_Q4_GW_Report text.doc 2.1.4 Parameters Analyzed All routine quarterly and semi-annual groundwater monitoring samples were analyzed for the parameters listed in Table 2 and Part I.E.l.c) 2) ii of the GWDP dated June 17, 2010. The accelerated monitoring samples were analyzed for a more limited and specific parameter list as shown in Table 2. 2.1.5 Groundwater Head Monitoring Depth to groundwater was measured in the following wells and/or piezometers, pursuant to Part I.E.2 of the GWDP dated June 17,2010: • The quarterly groundwater compliance monitoring wells (including the newly installed MW-33, MW-34, and MW-35 if water was present). • Existing monitoring well MW -4 and all of the temporary chloroform investigation wells. • Piezometers -P-1, P-2, P-3, P-4 and P-5. • Nitrate monitoring wells. • In addition to the above, depth to water measurements are routinely observed in conjunction with sampling events for all wells sampled during quarterly and accelerated efforts, regardless of the sampling purpose. All water levels used for groundwater contour mapping were measured and recorded within 5 calendar days of each other as indicated by the measurement dates in the summary sheet under Tab D. 2.2 Field Data Attached under Tab B are copies of all field data sheets recorded in association with the quarterly effort (sampled in November) for the groundwater compliance monitoring wells referred to in paragraph 2.1.1, above. Sampling dates are listed in Table 1. Tab B also includes field data sheets for general monitoring wells MW-20 and MW-22, which were still monitored quarterly during fourth quarter 2010. Attached under Tab C are copies of all field data sheets recorded in association with the October and December 2010 accelerated monitoring and sampling efforts. It is important to note that the field data sheet appearance has changed as a result of the implementation of an electronic data capture system. The field data sheets contain the same information as the approved field data sheet attached to the approved QAP in approximately the same location. The new data sheets allow the electronic capture of data while still maintaining the real-time recording of information manually in ink as 3 N:lRequired ReportslGroundwater Quarterly Monitorirg Report12010 Q412010_Q4_GW _Report text. doc required by UDEQ. The changes were made to accommodate the data recording and validation system. 2.3 Laboratory Results -Quarterly Sampling 2.3.1 Copy of Laboratory Results All analytical results are provided by one of the Mill's two contract analytical laboratories Energy Laboratories ("EL") or America West Analytical Laboratories ("A W AL"). Table 1 lists the dates when analytical results were reported to the Quality Assurance ("QA") Manager for each well. Results from analysis of samples collected for the fourth quarter in November under the GWDP (i.e., all regular quarterly and semi-annual samples), as well as results from background wells MW-20 and MW-22, which continued to be sampled quarterly, are provided in Tab E. Also included under Tab E are the results of analyses for duplicate samples and the rinsate blank sample for this sampling effort, as identified in Table 1. The laboratory report dates for samples collected for the October and December accelerated sampling (i.e. quarterly accelerated to monthly) are provided in Table 1. Results from analysis of samples collected for the October and December accelerated sampling (i.e. quarterly accelerated to monthly) are provided in Tab F. Also included under Tab F are the results of analyses for duplicate samples for this sampling effort, as identified in Table 1. Copies of laboratory QNQuality Control ("QC") Summaries are included with the reported data under their corresponding Tabs. 2.3.2 Regulatory Framework and Groundwater Background Under the GWDP dated June 17, 2010 (and as updated February 15, 2011), background groundwater quality has been determined on a well-by-well basis, as defmed by the mean plus second standard deviation concentration or the equivalent. New GWCLs that reflect this background groundwater quality have been set for all monitoring wells except MW- 35 in the January 20, 2010 GWDP. These new GWCLs were in effect for sampling required during the current fourth quarter monitoring period. Exceedances of the January 21, 2010 GWCLs determined the accelerated monthly monitoring program implemented during this quarter as noted in Tables 1 and 2. Exceedances of the GWCLs for the fourth quarter (October through December) of 2010 are listed in Table 2 for sampling required under the revised GWDP (June 17, 2010). Table 3 shows the accelerated sampling program which started in the second quarter 4 N:lRequired ReportslGroundwater Quarterly Monitoring Report\2010 Q4\201O_Q4_GW _Report text.doc 2010 and shows the results and frequency of the accelerated sampling conducted since that time. It should be noted, however, that, because the GWCLs have been set at the mean plus second standard deviation, or the equivalent, un-impacted groundwater would normally be expected to exceed the GWCLs approximately 2.5% of the time. Therefore, exceedances are expected in approximately 2.5% of all sample results, and do not necessarily represent impacts to groundwater from Mill operations. 2.4 Laboratory Results -Accelerated Monitoring 2.4.1 Copy of Laboratory Results The analytical results for the accelerated monthly monitoring of the various constituents in certain monitoring wells for the quarter are provided at Tab F. 2.4.2 Regulatory Framework and Groundwater Background As a result of the issuance of the revised GWDP on January 20,2010, which sets revised GWCLs, all requirements to perform accelerated monitoring under Part I.G.l of the previous GWDP ceased effective on January 20,2010, and the effect of the issuance of the revised GWDP was to create a "clean slate" for all constituents in all wells going forward. This means that accelerated monitoring during the fourth quarter was required under the revised GWDP for only those constituents that exceeded the GWCLs since January 20, 2010. 2.4.3 Compliance Status Analytes which have exceeded the GWCLs set forth in the GWDP are summarized in Tables 2 and 3. The analytes which exceeded their respective GWCLs during the fourth quarter 2010 will be sampled on an accelerated schedule as noted in Table 2. Analytes which exceeded their respective GWCLs one or more times since January 20, 2010 are currently sampled on an accelerated schedule. A review of the accelerated data collected during fourth quarter 2010 indicates that several analytes have exceeded their respective GWCLs for two consecutive sampling periods as reported in DUSA's letter to DRC on February 14,2011 and as amended February 24,2011. A summary of DUSA's review of those data is included below. It is important to note that, as was pointed out in the Revised N ew Wells Background Report (Intera 2008), there are natural forces that have resulted in upward and downward trends in a number of analytes in groundwater wells at the Mill, in wells upgradient of the Mill and in wells far downgradient of the Mill. The existence of such trends both upgradient and far downgradient of the Mill is evidence that such trends can result completely from natural causes. See Section 8.0 of the Revised Background 5 N:lRequired ReportslGroundwater Quarterly Monitoring Report1201 0 Q4120 I O_Q4_GW _Report text, doc Groundwater Quality Report: Existing Wells (Intera 2007) for a discussion of the natural influences that can be at play at the Mill. Additionally, in the Revised New Wells Background Report DUSA stated: "If natural influences continue to cause a rising trend (decreasing pH) in any constituents that lead to a violation of any of the proposed GWCLs, then the fact that they are subject to natural background influences should be taken into account in evaluating any out-ol-compliance situations. Specifically, Part J-G.4 of the G WDP should be amended to contemplate an investigation as to whether or not an "out-ol-compliance" situation has been caused by natural influences, and to provide that a remedial action would not necessarily be required under the GWDP. If it is not possible to make such an amendment to the GWDP, then further thought should be given to setting GWCLs for upward trending constituents ... Table 4 lists analytes that that have exceeded the GWCL for two or more consecutive sampling periods and whether those analytes were identified as having a statistically significant trend identified in either the Revised Background Groundwater Quality Report: Existing Wells or the Revised New Wells Background Report. Note that in ten cases, or half of all cases, analytes with two or more consecutive sampling periods that have exceedances above the GWCLs were previously identified as having statistically significant trends. Further, as noted in the Revised New Wells Background Report, there are statistically decreasing trends in pH in a number of wells at the Mill and a noticeable, if not statistically significant, natural decrease in trends in pH at most wells at the Mill. The Revised New Wells Background Report stated: "Decreasing trends in pH at the site appear to be cyclical and typical of many wells at the site" Note that decreasing pH that was not previously identified as a significantly decreasing trend accounts for an additional five more cases where two or more consecutive sampling periods had analytes which exceeded the GWCL. Further, DUSA's letter of February 1, 2011 noted that the current pH GWCLs are based on historic laboratory pH measurements but field pH measurements are used to determine compliance with the GWCLs. DUSA has proposed a recalculation of the GWCLs based on historic field pH measurements. DRC has agreed with the DUSA proposal to recalculate the pH GWCLs based on field data. The processing of the pH data are currently in progress and proposed revised GWCLs will be submitted to DRC on or before June 30, 2011. Additionally, it should be noted that a number of constituents, particularly metals, become more mobile as pH declines. Note that MW-24, which is beginning to show measurable concentrations of cadmium and thallium, currently has field pH values near 5.9 standard units (S.U.s). This pH is among the lowest at the Mill and is most likely contributing to the increased cadmium and thallium concentrations reported since Q2 2010. 6 N:lRequired ReportslOroundwater Quarterly Monitoring Report120 LO Q41201 O_Q4_ OW_Report text.doc It is also important to note that the Exceedance Notice submitted to DRC, February 14, 2011 noted three potential exceedances of Gross Alpha in wells MW-2, MW-26 and MW-27. The Exceedance Notice also flagged those results as suspect due to method blank contamination present in the analytical batches. DUSA directed EL to re-prepare and reanalyze those analytical batches, since the samples were still within the QAP and method specified holding time of six months. The reanalyzed sample results are included with this report. The resubmitted data from the reanalysis indicates that the initial data were incorrect and the detections reported by the laboratory were the result of laboratory contamination. The initial data have been rejected from use. The data from the reanalysis are below the respective GWCLs and as a result, MW-2, MW-26 and MW-27 will not need to be monitored on an accelerated basis for Gross Alpha. A letter detailing the corrected results was submitted to DRC on February 24, 2011. Table 3 summarizes the results of the accelerated sampling program from first quarter 2010 through fourth quarter 2010. 2.5 Depth to Groundwater and Water Table Contour Map As stated above, a listing of groundwater level readings for the quarter (shown as depth to groundwater in feet) is included under Tab D. The data from Tab D has been interpreted (kriged) and plotted in a water table contour map, provided under Tab H. The water table contour map provides the location and identity of all of the wells and piezometers for which depth to groundwater is recorded. The groundwater elevation at each well and piezometer, measured in feet above mean sea level, and isocontour lines to delineate groundwater flow directions observed during the quarter's sampling event are displayed on the map. 3.0 QUALITY ASSURANCE AND DATA VALIDATION The Mill QA Manager performed a QAlQC review to confirm compliance of the monitoring program with requirements of the QAP. As required in the QAP, data QA includes preparation and analysis of QC samples in the field, review of field procedures, an analyte completeness review, and quality control review of laboratory data methods and data. Identification of field QC samples collected and analyzed is provided in Section 3.1. Discussion of adherence to Mill sampling Standard Operating Procedures ("SOPs") is provided in Section 3.2. Analytical completeness review results are provided in Section 3.3. The steps and tests applied to check laboratory data QAlQC are discussed in Sections 3.4.4 through 3.4.10 below. The Analytical Laboratories have provided summary reports of the analytical QAlQC measurements necessary to maintain conformance with National Environmental Laboratory Accreditation Conference ("NELAC") certification and reporting protocol. The analytical laboratory QAlQC Summary Reports, including copies of the Mill's Chain of Custody and Analytical Request Record forms for each set of Analytical Results, 7 N:IRequired ReportslGroundwater Quarterly Monitoring Report120 I 0 Q4120 I 0_ Q4 _ G W _Report texl,doc follow the analytical results under Tabs E and F. Results of review of the laboratory QAlQC information are provided under Tab G and discussed in Section 3.4, below. 3.1 Field QC Samples The following field QC samples were generated by Mill personnel and submitted to the analytical laboratory in order to assess the quality of data resulting from the field sampling program: Two duplicate samples were collected during quarterly sampling as indicated in Table 1. The QC samples were sent blind to the analytical laboratory and analyzed for the same parameters as permit-required samples. One duplicate sample was collected during each month of accelerated sampling as indicated in Table 1. The QC samples were sent blind to the analytical laboratory and analyzed for the same accelerated parameters as the parent sample. Seven trip blanks were provided by EL and returned and analyzed with the quarterly monitoring samples. One trip blank per month was provided by EL and returned and analyzed with the accelerated monthly monitoring samples. Seven trip blanks were provided by A W AL and returned and analyzed with the quarterly monitoring samples. One trip blank per month was provided by A W AL and returned and analyzed with the accelerated monitoring samples. Rinsate samples were also collected between well samples where nondedicated purging equipment was used. Rinsate samples were labeled with the name of the subsequently purged well with a terminal letter "R" added (e.g. TW 4-7R). The results of these analyses are included with the routine analyses under Tab E. One rinsate blank sample was collected during this quarterly sampling event as indicated in Table 1. All of the groundwater wells have dedicated sampling equipment except the newly installed MW- 33, MW-34, and MW-35. A rinsate blank sample was collected from the pump prior to the first use of the pump. 3.2 Adherence to Mill Sampling SOPs On a review of adherence by Mill personnel to the existing sampling SOPs, the QA Manager observed that QAlQC requirements established in the QAP were being adhered to and that the SOP's were implemented, except as described below. 8 N:lRequired ReportslOroundwater Quarterly Monitoring Report120 10 Q4120 1 0_ Q4 _OW_Report text.doc 3.3 Analyte Completeness Review All analyses required by the GWDP for the quarterly and semi-annual wells were performed. The accelerated sampling for the semi-annual wells (semi-annual to quarterly) was completed as required by the GWDP and as shown in Tables 2 and 3. The accelerated quarterly sampling (quarterly to monthly) required for this quarter, as shown in Tables 2 and 3, was performed as required with one exception as noted below. The monthly accelerated sampling program shown on Tables 2 and 3 is required as a result of exceedances in quarterly wells reported during sampling in first, second and third quarter 2010. The accelerated monthly samples which were required due to exceedances reported for first and second quarter 2010 were collected commencing in third quarter 2010. The monthly samples required due to exceedances reported in third quarter were collected commencing first quarter 2011. DUSA intended to commence the monthly sampling for the third quarter exceedances in December 2010, which was the first monthly sampling event after the receipt of the third quarter 2010 data in November 2010. However, although the data were reviewed, the information was not communicated to the Mill Staff in sufficient time to allow for the collection of the samples before the end of the fourth quarter 2010. Corrective actions are described in more detail in Section 4 of this report. 3.4 Data Validation The QAP and GWDP identify the data validation steps and data quality control checks required for the groundwater monitoring program. Consistent with these requirements, the QA Manager performed the following evaluations: a field data QNQC evaluation, a receipt temperature check, a holding time check, an analytical method check, a reporting limit check, a trip blank check, a QNQC evaluation of routine sample duplicates, a QNQC evaluation of accelerated sample duplicates, a gross alpha counting error evaluation and a review of each laboratory's reported QNQC information. Each evaluation is discussed in the following sections. Data check tables indicating the results of each test are provided under Tab G. 3.4.1 Field Data QAlQC Evaluation The QA Manager performs a review of all field recorded parameters to assess their adherence with QAP requirements. The assessment involved review of two sources of information: the Field Data Sheets and the Quarterly Depth to Water summary sheet. Review of the Field Data Sheets addresses well purging volumes and stability of five parameters: conductance, pH, temperature, redox potential, and turbidity. Review of the Depth to Water data confirms that all depth measurements were conducted within a five- day period. The results of this quarter's review are provided in Tab G. Based upon this review, all quarterly and semi-annually sampled locations conformed to the QAP requirement to evacuate two well casing volumes before sampling except for MW-3A, MW-12, MW-23, MW-24, and MW-34. MW-3A, MW-12, MW-23, and MW- 9 N:lRequired ReportslGroundwatc:r Quarterly Monitoring Report12010 Q41201O_Q4_GW_Report tex doc 24 were evacuated to dryness before two casing volumes could be pumped. MW-34 had insufficient water to purge and the pump would not operate due to the insufficient amount of water in the well. Due to the small volume of water present, a sample was collected using a disposable bailer. It should be noted that MW-20 and MW-35 were pumped dry after purging two casing volumes. All accelerated sampled locations conformed to the QAP requirement to evacuate two well casing volumes before sampling except MW-26 which is a continuously pumped well. If a well is continuously pumped, it is pumped on a set schedule per the remediation plan and is considered sufficiently evacuated to immediately collect a sample; however, if a pumping well has been out of service for 48 hours or more, DUSA will follow the purging requirements outlined in Section 6.2.7(d)(v) of the QAP. During review of the field data sheets, it was observed that sampling personnel consistently recorded depth to water for the quarterly and semi-annual sampling programs to the nearest 0.01 foot. During review of the field data sheets, it was observed that sampling personnel consistently recorded depth to water for both the accelerated sampling programs to the nearest 0.01 foot. The review of the field sheets for compliance with QAP requirements resulted in the observations noted below. The QAP requirements in Section 6.2.7 specifically state that field parameters have to be stabilized to within 10% over at least 2 consecutive measurements. The QAP states that turbidity should be less than 5 Nephlometric Turbidity Units ("NTU") prior to sampling unless the well is characterized by water that has a higher turbidity. The QAP does not require that turbidity measurements be less than 5 NTU prior to sampling. As such the noted observations regarding turbidity measurements greater than 5 NTU below are included for information purposes only. • Turbidity measurements were less than 5 NTU for all of the quarterly and semi- annual wells except MW-5, MW-12, MW-20, MW-29, MW-32, MW-34 and MW-35. Per the QAP Section 6.2.7 d) (v) Turbidity measurements prior to sampling were within a 10% Relative Percent Difference ("RPD") for all quarterly and semi-annual wells except MW-35 which was purged dry after 2 casing volumes prior to stabilization within 10%. As such this requirement is not applicable. DUSA's letter to DRC of March 26, 2010 discusses further why turbidity does not appear to be an appropriate parameter for assessing well stabilization. In addition, DUSA is currently employing additional well development strategies as required by DRC prior to DRC's consideration of turbidity variances. • Turbidity measurements were less than 5 NTU for all of the accelerated sampling wells. As previously stated, the QAP does not require that turbidity be less than 5 NTU. Turbidity measurements prior to sampling were within a 10% RPD for all accelerated sampling wells except MW -31 in the October event. It is important to 10 N:IRequired ReportslGroundwater Quarterly Monitoring Report120 I 0 Q4120 I 0_ Q4 _ OW_Report text.doc note that the turbidity measurements for MW-31 were 0.1 NTU and 0.2 NTU which is an RPD of 66.67%. Due to the measurements being less than 1, any difference would produce a noncompliant RPD. The accuracy of the instrument is greater than the difference between these two measurements. As such the data are usable and the RPD is considered acceptable. DUSA's letter to DRC of March 26, 2010 discusses further why turbidity does not appear to be an appropriate parameter for assessing well stabilization. In addition, DUSA is currently employing additional well development strategies as required by DRC prior to DRC's consideration of turbidity variances. All other field parameters (conductance, pH, redox potential, and temperature) for all wells were within the required RPD for the quarterly, semi-annual and accelerated sampling. 3.4.2 Holding Time Evaluation QAP Table 1 identifies the method holding times for each suite of parameters. Sample holding time checks are provided under Tab G. All samples were received and analyzed within the required holding time except as noted below. Ten samples and one duplicate sample were analyzed for mercury beyond the 28-day holding time required by the QAP. The samples which exceeded the holding time are noted in Tab G. Pursuant to the GWDP Part I.G.3, initial notice was given by telephone to Mr. Phil Goble of UDEQ on January 19, 2011 and written notice was provided to UDEQ in a letter dated January 26, 2011. Corrective actions, root cause analysis and actions taken to prevent recurrence are described in the DUSA letter to UDEQ noted above and dated January 26,2011. 3.4.3 Receipt Temperature Evaluation Chain of Custody sheets (for A WAL) and temperature blank data sheets (for EL) were reviewed to confirm compliance with the QAP requirement in QAP Table 1 that samples be received at 6°C or lower. Sample receipt temperature checks are provided under Tab G. All quarterly, semi-annual and accelerated samples were received within the required temperature limit. 3.4.4 Analytical Method Checklist All analytical methods reported by both laboratories were checked against the required methods specified in Table 1 of the QAP. Analytical method check results are provided in Tab G. The review indicated that all quarterly, semi-annual and accelerated samples were analyzed in accordance with Table 1 of the QAP. It is recommended that the QAP be improved and updated to include additional methodologies currently in use by other laboratories certified under the Environmental Lab Certification Program administered by the Utah Department of Environmental 11 N:lRequired ReportslGroundwater Quarterly Monitoring Report12010 Q412010_Q4_GW_Report text.doc Quality ("UDEQ") Bureau of Lab Improvement. Potentially, to accommodate ongoing improvement in technology and methodology, the entire Table 1 and the Chloroform Investigation Appendix table should be revised to include other currently approved analytical methods in use by other Utah certified laboratories. 3.4.5 Reporting Limit Evaluation All analytical method reporting limits reported by both laboratories were checked against the reporting limits specified in the QAP Table 1. Reporting limit evaluations are provided in Tab G. All analytes were measured and reported to the required reporting limits except several sets of quarterly, semi-annual and accelerated sample results had the reporting limit raised for at least one analyte due to matrix interference and/or sample dilution as noted in Section 3.4.9. In all cases the reported value for the analyte was higher than the increased detection limit. 3.4.6 Trip Blank Evaluation All trip blank results were reviewed to identify any VOC sample contamination which is the result of sample handling and shipment. Trip blank evaluations are provided in Tab G. All trip blank results associated with both the quarterly, semi-annual and accelerated samples were less than detection level for all VOCs. 3.4.7 QAlQC Evaluation for Routine Sample Duplicates Section 9.1.4 a) of the QAP states that RPDs will be calculated for the comparison of duplicate and original field samples. The QAP acceptance limits for RPDs between the duplicate and original field sample is less than or equal to 20% unless the measured results (described as activities in the QAP) are less than 5 times the required detection limit. This standard is based on the EPA Contract Laboratory Program National Functional Guidelines for Inorganic Data Review, February 1994, 9240.1-05-01 as cited in the QAP. The RPDs are calculated for all duplicate pairs for all analytes regardless of whether or not the reported concentrations are greater than 5 times the required detection limits; however, data will be considered noncompliant only when the results are greater than 5 times the required detection limit and the RPD is greater than 20%. The additional duplicate information is provided for information purposes. All duplicate results were within a 20% RPD in the quarterly and semi-annual samples except iron in duplicate pair MW -18/MW -70. The sample results reported for MW- 18/MW -70 were not five times greater than the reporting limit of 30 and as such the deviation from the 20% RPD requirement is acceptable. Results of the RPD test are provided under Tab G. All duplicate results were within a 20% RPD in the accelerated samples except the chloroform and chloride results in duplicate pair MW-26/MW-65 collected during the October sampling event. The chloroform results above the 20% RPD limit is most likely the result of a dilution error in the laboratory and as such there is no affect on the quality 12 N:lRequired Reports\Groundwater Quarterly Monitoring Report\2010 Q4\2010_Q4_GW _Report text.doc or usability of the data. The chloride results are within the analytical error of the method and as such there is no affect on the quality or usability of the data. Results of the RPD test are provided under Tab G. 3.4.8 Radiologics Counting Error and Duplicate Evaluation Section 9.14 of the QAP requires that all gross alpha analysis reported with an activity equal to or greater than the GWCL, shall have a counting variance that is equal to or less than 20% of the reported activity concentration. An error term may be greater than 20% of the reported activity concentration when the sum of the activity concentration and error term is less than or equal to the GWCL. Section 9.4 of the QAP also requires a comparability check between the sample and field duplicate sample results utilizing the formula provided in the text. Results of quarterly radiologic sample QC are provided under Tab G. All quarterly radiologic sample results met the counting error requirement specified in the QAP. None of the accelerated samples were analyzed for gross alpha activity because none of the previous quarter's samples exceeded the GWCL for Gross Alpha. 3.4.9 Other Laboratory QAlQC. Section 9.2 of the QAP requires that the laboratory's QAlQC Manager check the following items in developing data reports: (1) sample preparation information is correct and complete, (2) analysis information is correct and complete, (3) appropriate analytical laboratory procedures are followed, (4) analytical results are correct and complete, (5) QC samples are within established control limits, (6) blanks are within QC limits, (7) special sample preparation and analytical requirements have been met, and (8) documentation is complete. In addition to other laboratory checks described above, DUSA's QA Manager rechecks QC samples and blanks (items (5) and (6)) to confirm that the percent recovery for spikes and the relative percent difference for spike duplicates are within the method-specific required limits, or that the case narrative sufficiently explains any deviation from these limits. Results of this quantitative check are provided under Tab G. All lab QAlQC results from both EL and A W AL samples for compounds regulated under the GWDP met these requirements. There were QC results which did not meet laboratory established acceptance limits, as identified in Tab G and described below. There were no qualifiers attached to the A W AL tetrahydrofuran data. Multiple sets of quarterly, semi-annual and accelerated sample results had the reporting limit raised for at least one analyte due to matrix interference and/or sample dilution. In all cases the reported value for the analyte was higher than the increased detection limit. Data are qualified by the laboratory with a "D" flag when the reporting limit is raised due to dilution or matrix interferences. 13 N :\Required ReportslGroundwater Quarterly Monitoring Report120 10 Q4120 IO _ Q4 _OW_Report text.doc The check samples included at least the following: a method blank, a laboratory control spike ("LCS"), a matrix spike ("MS") and a matrix spike duplicate ("MSD"), or the equivalent, where applicable. It should be noted that: • Laboratory fortified blanks are equivalent to LCSs. • Laboratory reagent blanks are equivalent to method blanks. • Post digestion spikes are equivalent to MSs. • Post digestion spike duplicates are equivalent to MSDs. • For method E900.1, used to determine gross alpha, a sample duplicate was used instead of a MSD. All qualifiers, and the corresponding explanations reported in the QA/QC Summary Reports for any of the check samples for any of the analytical methods were reviewed by the QA Manager. The QAP Section 8.1.2 requires that a MS/MSD (referred to as Duplicate Spike [Matrix spike] in the QAP) pair be analyzed with each analytical batch. The QAP does not specify acceptance limits for the MS/MSD pair, and the QAP does not specify that the MS/MSD pair be prepared on DUSA samples only. Acceptance limits for MS/MSDs are set by the laboratories. The review of the information provided by the laboratories in the data packages verified that the QAP requirement to analyze a MS/MSD pair with each analytical batch was met. While the QAP does not require it, the recoveries were reviewed for compliance with the laboratory established acceptance limits. The QAP does not require this level of review and the results of this review are provided for information only. The information from the Laboratory QAlQC Summary Reports indicates that the MS/MSDs recoveries and the associated RPDs for all quarterly and semi-annual samples were within acceptable laboratory limits for all regulated compounds except as indicated in Tab G. The recoveries and RPDs which are outside the laboratory established acceptance limits do not affect the quality or usability of the data because the recoveries and RPDs above or below the acceptance limits are indicative of matrix interference. Matrix interferences are applicable to the individual sample results only. Furthermore, the VOC samples in Work Order Numbers ClO110505, CI0110584, CI0110730, and CI0120105 which were spiked for the MS/MSD analyses were not collected at the Mill, and as such the matrix interference is not applicable to the Mill samples reported herein. The QAP requirement to analyze a MS/MSD pair with each analytical batch was met and as such the data are compliant with the QAP. The information from the Laboratory QAlQC Summary Reports indicates that the MS/MSDs recoveries and the associated RPDs for all accelerated samples were within acceptable laboratory limits for all regulated compounds except as indicated in Tab G. The recoveries and RPDs which are outside of the laboratory established acceptance limits do not affect the quality or usability of the data because the recoveries and RPDs above the acceptance limits are indicative of matrix interference. The QAP requirement 14 N:\Required ReportslGroundwater Quarterly Monitoring Report120 10 Q4120 I 0_ Q4 _ GW _Report text,doc to analyze a MS/MSD pair with each analytical batch was met and as such the data are compliant with the QAP. The QAP specifies that surrogate compounds shall be employed for all organic analyses but the QAP does not specify acceptance limits for surrogate recoveries. The analytical data associated with the quarterly, semi-annual and accelerated sampling met the requirement specified in the QAP. The information from the Laboratory QAIQC Summary Reports indicates that the surrogate recoveries for all quarterly, semi-annual and accelerated samples were within acceptable laboratory limits for all surrogate compounds except as indicated in Tab G. In all instances the surrogate recoveries outside of acceptance limits were above the upper limit or had a high recovery, indicating a high bias to the individual sample results. A high bias means that reported results for this analyte will tend to be higher than the actual concentration. There is no effect on the quality or usability of the data because there are multiple surrogates added to each sample and all other surrogates were within limits. Furthermore, there are no QAP requirements for surrogate recoveries. Since surrogate compounds were added to all of the organic analyses as required by the QAP, the data are compliant with the QAP requirements. The information from the Laboratory QNQC Summary Reports indicates that the LCS recoveries for both the quarterly, semi-annual and accelerated samples were within acceptable laboratory limits for all LCS compounds except as indicated on Tab G. In all instances the LCS recoveries outside of acceptance limits were above the upper limit or had a high recovery, indicating a high bias to the individual sample results. A high bias means that reported results for this analyte will tend to be higher than the actual concentration and as such there is no effect on the quality or usability of the data. Furthermore, there are no QAP requirements for LCS recoveries. The QAP requirement to analyze an LCS with each analytical batch was met and as such the data are compliant with the QAP. The QAP Section 8.1.2 requires that each analytical batch shall be accompanied by a reagent blank. All analytical batches routinely contain a blank, which is a blank sample made and carried through all analytical steps. For the Mill samples, a method blank is prepared for all analytical methods. Per the approved QAP, contamination detected in analysis of method blanks will be used to evaluate any analytical laboratory contamination of environmental samples. The QAP does not specify the process for evaluation of method blanks. For consistency, the QAP required evaluation criteria for rinsate blanks will be used. The QAP criteria for rinsate blanks states that nonconformance will exist when blanks are within an order of magnitude of the sample results. Fifteen analytes were reported in the method blanks from EL. Method blank results are included in Tab E. In all cases the method blank results were less than an order of magnitude relative to the positive sample results except as noted below. In Work Order CIOl10928, the sulfate result in the rinsate sample was not an order above the method blank result. Except as noted above the method blank detections reported by EL do not affect the quality or usability of the data due to either the low level of the constituent in the method blank or the high level of the constituents in the samples relative to the associated method blank concentrations. Additionally, blank detections are 15 N:lRequired ReportslGroundw.ter Quarterly Monitoring Report12010 Q412010_Q4_GW _Report text.doc indicative of a false positive or high bias to the sample results as the laboratory contribution to the results would likely cause higher sample results. The QAP requirement to analyze a method blank with each batch and evaluate the results has been completed as required. 3.4.10 Rinsate Blank Samples Rinsate blank sample checks are provided in Tab G. A comparison of the rinsate blank sample concentration levels to the QAP requirements -that rinsate sample concentrations be one order of magnitude lower than that of the actual well -indicated that all of the rinsate blank analytes met this criterion except ammonia and nitrate. Nitrate contamination in rinsate blanks has been problematic during the nitrate and chloroform sampling programs at the Mill. Corrective actions and investigations are on-going under the nitrate and chloroform programs. Ammonia is most likely a derivative of the nitrate contamination arising from the use of nitric acid during the decontamination process. It is important to note that the laboratory flagged the sulfate contamination in the rinsate blank sample "B" indicating that sulfate was also detected in the method blank. The detection in the method blank indicates that the detection reported in the rinsate blank sample is most likely caused by laboratory contamination rather than cross contamination from field activities. A deionized field blank ("DIFB") is not required by the approved QAP but should be collected when DI water is used to collect rinsate blank samples to verify that the DI water is not the source of contamination during the rinsate blank sampling process. Corrective actions are discussed in Section 4 of this report. The frequency of rinsate blank sample collection was modified this quarter. Dedicated pumps are placed in all of the groundwater wells except MW-33, MW-34 and MW-35. Prior to this quarter rinsate blanks were not routinely collected during the groundwater sampling program. Historically, when nondedicated equipment was used, a rinsate blank sample was collected after each decontamination of the nondedicated pump and prior to the next use of the pump. Per an e-mail from Mr. Phil Goble, dated October 4, 2010, rinsate blank samples are only required at the beginning of the sampling event and at the beginning of each day of sampling. The frequency change was implemented this quarter. MW-33, MW-34 and MW-35 were sampled the first time this quarter, and dedicated pumps had not yet been installed in MW-33, MW-34 and MW-35. The portable pump was intended to be used to sample these wells. MW-33 was dry and was not able to be sampled. The Field Staff attempted to use the portable pump in MW-34, but the water column was insufficient and not enough of a "head" could be built up in the pump and the pump did not work. The portable pump was used to sample MW-35. The portable pump was decontaminated on November 26,2010, a rinsate blank sample was collected and then the pump was used to try and sample MW-34. As previously stated, the pump 16 N:lRequired ReportslOroundwater Quarterly Monitoring Report12010 Q41201O_Q4_0W_Report text.doc was ineffective. The pump was removed from MW-34 and decontaminated. MW-34 was sampled with a disposable bailer. On December 1, 2010, the pump was decontaminated and used to purge and collect a sample from MW-35. A rinsate blank sample should have been collected on December 1, 2010, however, the Field Staff inadvertently omitted the collection of the rinsate blank sample. Corrective actions are discussed in Section 4 of this report. 4.0 CORRECTIVE ACTION REPORT Necessary corrective actions identified during the current monitoring period are described below, in accordance with Part I.F.1.e ofthe GWDP. Two items of note were identified during this reporting period which were deviations from requirements but are not discussed in the corrective action section below. The items are the missed holding time on eleven mercury samples and the deviation of the turbidity in one accelerated sample during the October sampling event. The missed holding times on eleven mercury samples and the associated corrective actions were discussed in detail in the DUSA letter to DRC dated January 26,2011. The referenced letter described the background information pertinent to the incident, root causes and actions taken. The deviation from the turbidity RPD requirement was due to the magnitude of the measurements and is not at all reflective of a non-compliant condition. The measurements were 0.1 and 0.2 NTU s. As previously stated, the turbidity measurements for MW-31 were 0.1 NTU and 0.2 NTU which is an RPD of 66.67%. Due to the measurements being less than 1, any difference (within the measurement accuracy of 0.1 NTU) would produce a noncompliant RPD. The accuracy of the instrument is not sufficient to distinguish between these two measurements. In addition, DUSA is currently evaluating the suitability of turbidity, as well as other parameters, in determining stabilization of monitoring wells. DUSA is implementing a well redevelopment program. DUSA's letter of July 12, 2010 and DRC's response of July 15, 2010 identified the parameters for selecting wells for redevelopment. 4.1 Identification and Def'mition of the Problem The problems identified were: Rinsate Blank Collection Procedures Rinsate blank collection procedures were not followed as required. An additional rinsate blank should have been collected on the second day the portable pump was used for sampling. A DIFB while not required by the approved QAP, should be collected when DI water is used to collect rinsate blank samples to verify that the DI water is not the source of contamination during the rinsate blank sampling process. 17 N:lRequired ReportslOroundwater Quarterly Monitoring Report120l 0 Q4120 IO_Q4_ OW_Report text.doc Accelerated Monitoring Frequency The accelerated monitoring conducted in December 2010 did not include those analytes identified during the third quarter 2010 as requiring accelerated monthly sampling. 4.2 Assignment of Responsibility for Investigating the Problem The problems have been investigated by the QA Manager. 4.3 Investigation and Determination of Cause of the Problem Rinsate Blank: Collection Procedures Rinsate blank: samples are not usually collected during the groundwater sampling program because all of the wells except the three newly installed wells have dedicated pumps. The three new wells (MW-33, MW-34 and MW-35) were added to the sampling program during this sampling period and the procedure routinely implemented during the chloroform and nitrate programs was not followed due to an inadvertent omission by the Field Staff. Accelerated Monitoring Frequency The additional analytes for the monthly accelerated program identified during the third quarter 2010 were inadvertently omitted from the December monthly sampling due to the lateness of the laboratory submission of the data from the third quarter sampling event. 4.4 Determination of a Corrective Action to Eliminate the Problem Rinsate Blank: Collection Procedures A revised GWDP was received by DUSA in February 2011. The revised GWDP removes the requirement to sample MW-33 and MW-34 for the analytes delineated in Table 2 of the GWDP. MW-35 will remain in the sampling program and depth to water measurements only will be collected from MW-34. To address the inadvertent omission of the correct number of rinsate blanks and the inadvertent omission of the DIFB (not required by the approved QAP), the corrective action will be to install a dedicated pump into MW-35 prior to the second quarter 2011 sampling event. The corrective action was not be implemented prior to the first quarter 2011 sampling event because that event was completed prior to the publication of this report and corrective action review. Accelerated Monitoring Frequency The omission of the analytes from the December monthly event has prompted the QA Manager to revise the exceedance tracking procedures, review frequency and procedures for the analytical data received from the laboratory. Additional staff will be trained and used to review data against the GWCLs which will result in a quicker processing time and additional reviews of the requirements. 18 N:\Requ ired ReportslGroundwater Quarterly Monitoring Report120 10 Q4120 10_ Q4_ OW_Report t«(,doc 4.5 Assigning and Accepting Responsibility for Implementing the Corrective Action It will be the responsibility ofthe Director, Compliance and Permitting to implement both corrective actions. Rinsate Blank Collection Procedures The QA Manager has directed the Field Staff at the Mill to purchase a dedicate pump for MW-35. The QA Manager will assure the installation of the pump prior to the second quarter 2011 sampling event. With the installation of the dedicated pump in MW-35 a DIFB will not need to be collected as all of the wells will then have dedicated equipment and a rinsate blank sample will not be required for the groundwater sampling program. Accelerated Monitoring Frequency The QA Manager is in the process of training additional staff for the reVIew and exceedance tracking procedures described above. 4.6 Implementing the Corrective Action and Evaluating Effectiveness Rinsate Blank Collection Procedures Implementation of the corrective action for rinsate blank collection variance will follow the installation of the dedicated sampling pump in MW -35. With the installation of the pump rinsate blank samples will not need to be collected during the groundwater sampling program. Accelerated Monitoring Frequency Implementation of the corrective action for the accelerated monitoring program review has begun with the training of the new staff. 4.7 Verifying That the Corrective Action Has Eliminated the Problem Verification of the corrective action for the rinsate blank deviation noted above will be completed after the verification of the installation ofthe dedicated pump in MW-35. Verification of the accelerated sample frequency and analyte tracking procedure will occur after the collection ofthe first quarter 2011 samples are collected and the data are received. 19 N:\Required ReportslGroundwater Quarterly Monitoring Report12010 Q41201O_Q4_GW_Report text.doc 4.8 Assessment of Corrective Actions from Previous Period Below is a discussion of the corrective actions specified in previous reports. The previous two Groundwater Monitoring Reports specified a corrective action for depth to water measurements that were measured properly to the nearest 0.01 feet, but trailing zeros were not recorded on the field sheets. The corrective action included advising Field Staff to record the measurements fully and for DUSA to implement a data capture system. As required, Field Staff were advised of the proper recording of depth to water measurements. In addition, data were checked as soon as possible after collection during the fourth quarter 2010 sampling event to assure proper recording of depth to water measurements. All measurements were recorded properly and the corrective action was successful in preventing recurrence. Furthermore, the data capture system has been modified implemented and has prevented recurrence. No further tracking of this corrective action is required. The third quarter 2010 groundwater report specified corrective actions for turbidity and decreased flow rates noted during well purging. Both of the corrective actions specified were successful and will not require additional follow-up actions. The corrective actions are summarized below. DUSA is currently implementing well redevelopment in response to DRC's letters dated June 1, 2010 and June 24, 2010 to address turbidity variances. The redevelopment program has currently identified wells which will be redeveloped using various methods. The redevelopment is scheduled to begin in early 2011. Historical data indicate that decreased flow rates occur prior to wells being purged to dryness. During the third quarter 2010 Mill personnel did not purge the wells to dryness and did not recalculate the time necessary to purge 2 casing volumes which resulted in less than two casing volumes being purged from two wells prior to sampling. Mill Field Staff were advised that recalculation of purge times is required when flow rates decrease to ensure that two casing volumes have been purged prior to sampling. Retraining of sampling personnel has been completed. The field data sheets noted decreasing flow rates and prior to the recalculations being completed the wells were purged to dryness. As such the retraining was considered successful. 5.0 TIME CONCENTRATION PLOTS Time concentration plots for each monitoring well for the following constituents: chloride, fluoride, sulfate, and uranium, are included under Tab 1. 20 N :\Required Rep<lrtslGroundwater Quarterly Monitoring Rep<lrt\20 10 Q4\20 10_ Q4_ OW_Report text.doc 6.0 ELECTRONIC DATA FILES AND FORMAT DUSA has provided to the Executive Secretary electronic copies of all laboratory results from groundwater quality monitoring conducted during the quarter in Comma Separated Values ("CSV"), from the EL data; and in Electronic Data Deliverable ("EDD") fonnat from the A WAL data. A copy of the transmittal e-mail is included under Tab J. 21 7.0 SIGNATURE AND CERTIFICATION This document was prepared by Denison Mines (USA) Corp. on February 28, 2011. S (USA) CORP. By: Vice President, Regulatory Affairs and Counsel 22 Certification: I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant pe Ities for submitting false information, including the possibility of fine and en for knowing violations. Da . C. F denlund Vice President, Regulatory Affairs and Counsel Denison Mines (USA) Corp. 23 N:lRequired ReportslGroundwater Quarterly Monitoring RepoT\1201O Q412010_Q4_GW _Report text.doc Tables Table I: Summary of Well Sampling for the 2010 Quarter 4 Purpose for sampling Well Normal Frequency this quarter Sample Date Date of Lab Report Routine Samples MW-I Semi-annually Semi-annually 1lI18/2010 11612011 (11129/2010) MW-2 Semi-annually Semi-annually 11117/2010 12130/20 I 0 (11123/20 I 0) [2123120 II] MW-3 Semi-annually Semi-annually 1lI1 9/20 10 116/2011 (11123/2010) MW-3A Semi-annually Semi-annually 1lI22/2010 12130/2010 (1217/20 I 0) MW-4 Quarterly -Chloroform N/A* 11115/2010 12/30/20 I 0 (11/23/20 I 0) [2/23/20 II] MW-5 Semi-annually Semi -annually 11/11/2010 12/8/2010 (11122/2010) [2/23/2011] MW-II Quarterly Quarterly 1111112010 12/8/2010 (11122/2010) [2123/2011] MW-12 Semi-annually Semi-annually 11119/2010 116/2011 (11129/2010) MW-14 Quarterly Quarterly 11110/2010 12129/2010 (11/19/2010) (212312011) MW-15 Semi-annually Semi-annually 1111112010 12/8/2010 (11122/2010) [2/23/2011] MW-17 Semi-annually Semi-annually 11/17/2010 12130/2010 (11/23/2010) [212312011] MW-18 Semi-annually Semi-annually 11118/2010 1/6/20 II (11/29/2010) MW-19 Semi-annually Semi-annually 11118/2010 116/2011 (J 1129/2010) MW-20 Quarterly Background 11/22/2010 12/30/2010 (121712010) MW-22 Quarterly Background 11116/2010 12/30/2010 (11123/2010) [21231201IJ MW-23 Semi-annually Semi-annually 11/22/2010 12/30/20 I 0 (1217120 I 0) MW-24 Semi-annually Semi-annually 11117/2010 12130/2010 (11123/2010) [212312011] MW-25 Quarterly Quarterly 11110/2010 12129/2010 (11119/2010) [2/23 /2011] MW-26 Quarterly Quarterly 1lI15/2010 12/30/2010 (11/23/2010) [2/2312011] MW-27 Semi-annually Semi-annually 11/12/2010 12/8120 I 0 (11122/2010) [2123120 III MW-28 Semi-annually Semi-annually 11112/2010 12/8/2010 (11122/2010) [212312011] MW-29 Semi-annually Semi-annually 11/9/2010 12/29/2010 (11/19/2010) [2/23/2011] MW-30 Quarterly Quarterly 11/9/2010 12129/2010 (11119/2010) [2123/2011) MW-31 Quarterly Quarterly 1119/2010 12129/2010 (11119/2010) [2123/2011) MW-32 Semi-annually Semi-annually 11110/2010 12129/2010 (11/19/2010) [2123/2011) MW-33 Quarterly Background Dry N/A MW-34 Quarterly Background 11129/2010 11612011 (12/8/2010) MW-34R N/A Rinsate before MW-34 11126/2010 1/6/2011 (12/8/2010) MW-35 Quarterly Background 12/112010 1110/20 II (1211412010) [212312011] MW-65 I per Batch Duplicate ofMW-32 11110/2010 12/29/2010 (11/19/2010) [2123/2011] MW-70 I per Batch Duplicate ofMW-18 11118/2010 1/612011 (11129/2010) Accelerated Samples Accelerated October Monthly MW-ll Monthly Accelerated 10/2012010 11112/2010 (1113/2010) MW-14 Monthly Accelerated 10/20/2010 11112/2010 MW-26 Monthly Accelerated 10/20/2010 11/12/2010 MW-30 Monthly Accelerated 10119/2010 11112/2010 MW-31 Monthly Accelerated 10/19/2010 11112/2010 MW-65 I per Batch Duplicate of MW-26 10/20/2010 11112/2010 Accelerated December Monthly MW-l1 Monthly Accelerated 12115/2010 111412011 (12/27/2010) MW-14 Monthly Accelerated 12/1512010 1114/2011 MW-26 Monthly Accelerated 12/15/2010 111412011 MW-30 Monthly Accelerated 12114/2010 1/14/2011 MW-31 Monthly Accelerated 12114/2010 111412011 MW-65 1 ~per Batch Duplicate of MW-26 12/15/2010 1114/2011 Notes: Date in parenthesis depicts the date that tetrahydrofuran was reported from American West Analytical Laboratories. Date in brackets depicts the date the resubmitted Energy Laboratories data packages were reported. All other constituents were reported from Energy Laboratories. NI A * -MW -4 is sampled quarterly during the chloroform program. This well was inadvertently sampled for all of the groundwater program analytes. The data are included for information purposes only. N/A -Not Applicable Table 2 Exceedance Summary Table Monitoring Well GWCLin First Result Routine Sample Accelerated Exceedance Start of Accelerated Constituent Exceeding GWCL Exceeding the (Water Class) Current GWDP GWCL Frequency Frequency Sample Period Monitoring Quarterly Wells Accelerated to Monthly Samplingl Manganese (ug/L) 131.29 134 Quarterly Monthly Ql 2010 May 2010 MW-il (Class II) Tetrahydrofuran (ug/L) 11.5 12 Quarterly Monthly QI2010 May 2010* , MW-14 (Class III) Field pH (S.U.) 6.5 -8.5 6.46 Quarterly Monthly QI2010 May 2010 MW-25 (Class III) Uranium (ug/L) 6.5 6.57 Quarterly Monthly Q32010 January 2011 ** MW-26 (Class III) Nitrate + Nitrite (as N) (mg/L) 0.62 1.3 Quarterly Monthly QI2010 May 2010 Uranium (ug/L) 41.8 58.7 Quarterly Monthly QI2010 May 2010 Chlorofonn (ug/L) 70 700 Quarterly Monthly Ql 2010 May 2010 Chloride (mg/L) 58.31 72 Quarterly Monthly Ql 2010 May 2010 Methylene Chloride (ug/L) 5 9.9 Quarterly Monthly Q22010 June 2010 Field pH (S.U.) 6.74 -8.5 6.59 Quarterly Monthly Ql 2010 May 2010 TDS (mg/L) 3284.19 3440 Quarterly Monthly Q32010 January 2011 * MW-30 (Class II) Nitrate + Nitrite (as N) (mg/L) 2.5 16.1 Quarterly Monthly QI 2010 May 2010 Selenium (ug/L) 34 35.3 Quarterly Monthly Q22010 July 2010 MW-31 (Class III) Nitrate + Nitrite (as N) (mg/L) 5 21.7 Quarterly Monthly QI2010 May 2010 TDS (mg/L) 1320 1330 Quarterly Monthly Q32010 January 20 II ** Sulfate (mgIL) 532 539 Quarterly Monthly Q42010 March 2011 Semi-Annual Wells Accelerated to Quarterly Sampling! Monitoring Well GWCLin First Result Sample Accelerated Exceedance Start of Accelerated Constituent Exceeding GWCL Exceeding the (Water Class) Current GWDP GWCL Frequency Frequency Sample Period Monitoring MW-3 (Class III) Selenium (ug/L) 37 37.2 Semi-Annually Quarterly Q22010 Q32010 Field pH (S.U.) 6.5 -8.5 6.14 (6.25) Semi-Annually Quarterly Q22010 Q32010 Fluoride (mg/L) 0.68 0.71 Semi-Annually Quarterly Q22010 Q32010 MW-3A (Class III) Field pH (S.U.) 6.5 -8.5 6.23 (6.24) Semi-Annually Quarterly Q22010 Q32010 Sulfate (mg/L) 3640 3680 Semi-Annually Quarterly Q22010 Q32010 TDS (mg/L) 5805 5860 Semi-Annually Quarterly Q22010 Q32010 Selenium (ug/L) 89 94.8 Semi-Annually Quarterly 04 2010 Q12011 MW-5 (Class II) Uranium (ug/L) 7.5 11.6 Semi-Annually Quarterly 042010 Ql 2011 ----~-~ ----~ ~ ~ ----~ ~ -----_._._--Table 2 E d s Tabl ---.~-~ Semi-Annual Wells Accelerated to Quarterly Sampling I Monitoring Well GWCLin First Result Sample Accelerated Exceedance Start of Accelerated Constituent Exceeding GWCL Exceeding the (Water Class) Current GWDP GWCL Frequency Frequency Sample Period Monitoring MW-12 (Class III) Selenium (ug/L) 25 25.7 Semi -Annually Quarterly Q22010 Q32010 MW-18 (Class III) Thallium (ug/L) 1.95 3.73 Semi -Annually Quarterly Q22010 Q32010 Sulfate (mg/L) 1938.9 1950 Semi-Annually Quarterly Q22010 Q32010 Field pH (S.U.) 6.25-8.5 6.2 Semi-Annually Quarterly Q22010 Q32010 TDS (mg/L) 3198.77 3280 Semi-Annually Quarterly Q22010 Q32010 MW-19 (Class III) Field pH (S.u.) 6.78-8.5 6.61 (6.66) Semi-Annually Quarterly Q22010 Q32010 MW-23 (Class III) Field pH (S.U.) 6.5 -8.5 6.18 Semi-Annually Quarterly Q22010 Q32010 MW-24 (Class III) Cadmium (ug/L) 2.5 4.28 Semi-Annually Quarterly Q22010 Q32010 Thallium (ug/L) 1 1.3 Semi-Annually Quarterly Q22010 Q32010 Field pH (S.U.) 6.5 -8.5 5.91 (5.78) Semi-Annually Quarterly Q22010 Q32010 MW-27 (Class III) Nitrate + Nitrite (as N) (mg/L) 5.6 5.8 Semi-Annually Quarterly Q22010 Q32010 Chloride (mg/L) 38 42 Semi-Annually Quarterly Q22010 Q32010 Sulfate (mg/L) 462 469 Semi-Annually Quarterly Q22010 Q32010 TDS (mg/L) 1075 1160 Semi -Annually Quarterly Q22010 Q32010 MW-28 (Class III) Chloride (mg/L) 105 108 Semi -Annually Quarterly Q22010 Q32010 Field pH (S.u.) 6.1 -8.5 5.67 Semi-Annually Quarterly Q22010 Q32010 MW-32 (Class III) Gross Alpha minus Rn & U (pCi/L) 3.33 5.4 Semi -Annually Quarterly Q22010 Q32010 Field pH (S.u.) 6.4 -8.5 6.03 Semi-Annually Quarterly Q22010 Q32010 Notes: 1 GWCL Values are taken from January 20, and June 21,2010 version of the GWDP in which the GWCL table has not been changed. * THF has not reported an exceedance since Ql 2010 and has had 9 consecutive monotiring results below the GWCL. UDEQ requires continued monitoring of this constituent. ** Table 2 of the 2010 Q3 Groundwater report listed the start of accelerated monitoring as Q4 2010. Accelerated monitoring began in Q 1 2011. o Values listed in parentheses are resample results from the same sampling period. Sampled were recollected due field or laboratory problems as noted in the specific report for that sample period. Highlighted text shows accelerated requirements resulting from Q4 2010 sampling event. Table 3 -February 24, 2011 Corrected GWCL Exceedances for Fourth Quarter 2010 under the June 17, 2010 GWDP Ql Results Q2 Results Q3 Results Q4 Results May May June June July July August August Q3 October October Q4 December December Monitoring Constituent GWCLin Ql Sample Q2 Sample Monthly Monthly Monthly Monthly Q3 Monthly Sample Well (Water Exceeding GWCL Jun 17,2010 Date Ql Result Date Q2 Result Sample Monthly Sample Monthly Sample Monthly Sample Monthly Sample Result Sample Monthly Sample Q4 Result Monthly Monthly Frequency Class) GWDP Result Result Result Result Date Result Date Sample Date Result Date Date Date Date Date Required Quarterly Sampling Wells MW-II (Class Manganese (ug/L) 131.29 2/10/10 134 4/28/1 0 137 5/24/10 122 6/16/1 0 99 7/20/10 123 8/25/10 138 9/8/1 0 128 10/20/10 141 11/11/10 133 12/15/10 158 Quarterly II) Tetrahydrofuran (ugiL 11.5 2/10/10 12 4/28/10 5.2 5/24/10 <1.0 6/16/1 0 <1.0 7/27/10 2.17 8/25/1 0 <1.0 9/8/10 <1.0 <1.0 <1.0 <1.0 Quarterly MW-14 (Class Field pH (S.u.) 6.5 -8.5 2/2/10 6.46 4/21/10 III) 6.29 5/21/10 6.94 6/16/1 0 7.03 7/20/10 6.36 8/25/10 6.45 9/8/10 6.29 10/20/10 6.36 11/10/10 6.29 12/15/10 6.45 Quarterly MW-25 (Class Uranium 6.5 2/26/2010 5.93 4/28/2010 III) 6.43 NS NA NS NA NS NA NS NA 9/8/2010 6.57 NS NA 11/10/10 5.89 NS NA Quarterly Nitrate + Nitrite (as N) 0.62 1.3 2 0.3 0.4 (mglL) 0.6 0.6 0.7 0.4 0.2 0.4 Quarterly Uranium (ug/L) 41.8 58.7 66.7 37.4 36.6 34.4 71.8 72.7 37.5 30.4 29.6 Quarterly Chlorofonn (ug/L) 70 700 1700 800 940 900 2800 2100 1000 1900 1400 Quarterly MW-26 (Class Chloride (mglL) 58.31 72 57 80 6/16/10 47 7121110 52 8/16/10 49 9/26/1 0 64 10/20/1 0 52 11115/10 48 12/15/10 52 Quarterly III) Field pH (S.U.) 6.74 -8.5 2/2/10 6.59 4/22/10 7.16 5/21/10 7.08 7.05 6.36 6.98 7.18 6.36 7.18 6.98 Quarterly Dichloromethane (Methylene Chloride) 5 I 9.9 NR 2.2 12 24 45 5.5 16 1.2 Quarterly (ug/L) 1 TDS (mg/L) 3284.19 3100 3280 NS NS NS NS 3440 NS 3140 NS Quarterly MW-30 (Class Nitrate + Nitrite (as N) 2.5 16.1 15.8 17 15.3 7121/10 16 8/24/10 16 15 15 15 16 Quarterly (mg/L) 2/9/10 4/27/10 5/21110 6/15/1 0 9/15/1 0 10/19/1 0 1119/10 12/14/10 II) Selenium (ug/L) 34 32 35.3 NS NS 7/27/10 33.5 8/24/10 35.6 32.6 32.4 32.2 30.5 Quarterly Nitrate + Nitrite (as N) 5 21.7 22.5 5/21/10 23 6/15/10 21.1 7/21/10 20 8/24/10 22 21 10/19/10 20 20 20 Quarterly MW-31 (Class (mg/L) 2/9/1 0 4/20/10 9/13/10 11/9/10 12/14/10 III) TDS (mg/L) 1320 1150 1220 NS NA NS NA NS NA NS NA 1330 NS NA 1320 NS Quarterly Sulfate (mg/L) 532 507 522 NS NA NS NA NS NA NS NA 527 NS NA 539 NS Quarterly Required Semi-Annual Sampling Wells Selenium (uglL) 37 NS NA 37.2 NS NA NS NA NS NA NS NA 35.5 NS NA 38.8 NS NA Semi-Annually MW-3 (Class 6.14 III) Field pH (S.U.) 6.5 -8.5 NS NA 5/3/1 0 NS NA NS NA NS NA NS NA 9/20/10 6.14 NS NA 11/19/10 6.14 NS NA Semi-Annually (6.25) Fluoride (Mg/L) 0.68 NS NA 0.71 NS NA NS NA NS NA NS NA 0.63 NS NA 0.77 NS NA Semi-Annually Field pH (S.U.) 6.5 -8.5 NS NA 6.23 NS NA NS NA MW-3A (Class (6.24) NS NA NS NA 6.23 NS NA 6.23 NS NA Semi-Annually III) Sulfate (mglL) 3640 NS NA 5/4/1 0 3680 NS NA NS NA NS NA NS NA 9/21110 3630 NS NA 11122/1 0 3850 NS NA Semi-Annually TDS (mg/L) 5805 NS NA 5860 NS NA NS NA NS NA NS NA 5470 NS NA 5330 NS NA Semi-Annually Selenium (ug/L) 89 NS NA 81.4 NS NA NS NA NS NA NS NA NS NS NA 94.8 NS NA Semi-Annually MW-5 (Class Uranium (ug/L) 7.5 NS NA 4/26/10 0.39 NS NA NS NA NS II) NA NS NA NS NA NS NA 11111110 11.6 NS NA Semi-Annually MW-12 (Class Selenium (ug/L) 25 NS NA 4/27/10 III) 25.7 NS NA NS NA NS NA NS NA 9/20/10 31.9 NS NA 11/19/10 27.6 NS NA Semi-Annually Thallium (ug/l) 1.95 NS NA 3.73 NS NA NS NA NS NA NS NA 3.64 NS NA 3.57 NS NA Semi-Annually MW-18 (Class Sulfate (mg/L) 1938.9 NS NA 1950 NS NA NS NA NS NA NS NA 1930 NS NA 1910 NS NA Semi-Annually III) 5/4/1 0 9/15/10 11118/10 Field pH JS.U.) 6.25-8.5 NS NA 6.2 NS NA NS NA NS NA NS NA 7.15 NS NA 7.15 NS NA Semi-Annually TDS CmglL) 3198.77 NS NA 3280 NS NA NS NA NS NA NS NA 3190 NS NA 3030 NS NA Semi-Annually Ql Results Monitoring GWCLin Well (Water Constituent Current Ql Sample Exceeding GWCL Date Class) GWDP MW-19 (Class III) Field pH (S.U.) 6.78-8.5 NS MW-23 (Class Field pH (S.U.) 6.5 -8.5 NS III) MW-24 (Class Cadmium (uglL) 2.5 NS Thallium (ugIL) 1 NS III) Field pH (S.U.) 6.5 -8.5 NS Nitrate + Nitrite (as N) 5.6 NS MW-27 (Class (mg/L) III) Chloride (mg/L) 38 NS Sulfate (mglL) 462 NS TDS (mg/L) 1075 NS MW-28 (Class Chloride (mglL) 105 NS III) Field pH (S.U.) 6.1 -8.5 NS MW-32 (Class Gross Alpha minus Rn 3.33 NS & U (pCi/L) IH) Field pH (S.u.) 6.4 -8.5 NS Notes: GWCL values are taken from January 20, 2010 version of GWDP. NS = Not Required and Not Sampled NR = Required and Not Reported NA = Not Applicable Exceedances are shown in yellow Ql Result NA NA NA NA NA NA NA NA NA NA NA NA NA Q2 Sample Q2 Result Date 6.61 5/411 0 (6.66) 4122110 6.18 4.28 516/10 1.3 5.91 (5.78) 5.& 5/3110 42 469 1160 4119110 10& 5.67 4/20110 5.4 6.03 Q2 Results Q3 Results May May June June July July August August Monthly Monthly Monthly Monthly Monthly Monthly Monthly Monthly Sample Sample Sample Sample Date Result Date Result Date Result Date Result Required Semi-Annual SampUng Wells, continued NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA Values in green are considered suspect. Data review indicated sample results are associated with elevated Method Blanks. Reanalysis ofthe samples has been requested. Q3 Sample Date 911511 0 911411 0 9/2111 0 9114/10 9114/10 9/13 /10 o Values shown in parentheses are results from resampling ofthe well during the same sample period. Wells were resampled due to a field or laboratory problem which is described in the report for that sampling period. Q4 Results October October Q4 December December Q3 Monthly Monthly Sample Q4 Result Monthly Monthly Sample Result Sample Frequency Date Result Date Sample Date Result 6.61 NS NA 11118/10 6.61 NS NA Semi-Annually 6.18 NS NA 11 /2211 0 6.18 NS NA Semi-Annually 5.06 NS NA 3.22 NS NA Semi-Annually 1.57 NS NA 11117110 1.09 NS NA Semi-Annually 5.91 NS NA 5.91 NS NA Semi-Annually 5.9 NS NA 5.7 NS NA Semi-Annually 42 NS NA 1111211 0 45 NS NA Semi-Annuall>,- 461 NS NA 452 NS NA Semi-Annually 1060 NS NA 1110 NS NA Semi-Annually 106 NS NA 1111211 0 107 NS NA Semi-Annually 5.67 NS NA 5.67 NS NA Semi-Annually 2.9 NS NA 11110110 &.& NS NA Semi-Annually 6.03 NS NA 6.03 NS NA Semi -Annually Table 4 Summary of Analytes Exceedin~ the GWCLS for Two or More Consecutive Sampling Periods Well Analyte Trend Analyte Trend Analyte Trend MW-ll Manganese up MW-14 pH up MW-26 Nitrate up Chloroform up Dichloromethane up MW-30 Nitrate up MW-31 Nitrate none MW-3 pH down MW-3A pH down MW-12 Selenium up MW-18 Thallium up MW-19 pH none MW-23 pH none MW-24 Cadmium none Thallium none pH none MW-27 pH none MW-28 Chloride none pH down MW-32 pH none Analyte exceeded the GWCl for two or more consecutive sampling periods as result of a previously identified trend. INDEX OF TABS Tab A Site Plan and Perched Well Locations White Mesa Site Tab B Field Data Worksheets Quarterly Sampling Tab C Field Data Worksheets Accelerated Monitoring Tab C1 Field Data Worksheets Accelerated Monitoring, July 2010 Tab C2 Field Data Worksheets Accelerated Monitoring, August 2010 Tab D Quarterly Depth to Water Tab E Laboratory Analytical Reports -Quarterly Sampling Tab F Laboratory Analytical Reports -Accelerated Monitoring Tab F1 Laboratory Analytical Reports -Accelerated Monitoring, July 2010 Tab F2 Laboratory Analytical Reports -Accelerated Monitoring, August 2010 Tab G Quality Assurance and Data Validation Tables G-1AIB G-2 G-3A1B G-4A1B G-5 G-6A1B G-7A1B G-8 G-9A1B G-10 Field Data QAlQC Evaluation Holding Time Evaluation Laboratory Temperature Check Analytical Method Check Reporting Limit Evaluation Trip Blank Evaluation QAlQC Evaluation for Sample Duplicates Radiologies Counting Error Laboratory Matrix QC Rinsate Blank Detections Tab H Kriged Current Quarterly Groundwater Contour Map and Depth Data Tab I Groundwater Time Concentration Plots Tab J CSV Transmittal Letter Tab A Site Plan and Perched Well Locations White Mesa Site JI /I (( II ,-' -7 -:7 #' I/, II // # II II II II ~;I ~ ~~ ~ =::::d-- 0 MW-20 • TW4-19 0 PIEZ-1 " TWN-1 ~ TW4-26 ~ MW-34 -<> II II II II II 11 32 II I' II I' I' II I' I' " ,I \ • MW-21 II II II \\ ~ ~ ~ SCALE IN FEET EXPLANATIQN perched monitoring well ~ ~ temporary perched monitoring well perched piezometer temporary perched nitrate monitoring well temporary perched monitoring well installed May, 2010 perched monitoring well installed August/September, 2010 MW-02 • PROPERTY BOUNDARY l II II {( ~ II II 1/ II II II II 'I MW-01 • ~5 ~ TWN-7 MW-27 • CELL NO.1 CELL NO_ 2 MW-18 • ~ TWN-18 ~ TWN-3 ~ TWN-6 ~ TWN-8 ~ TWN-15 ~ TWN-10 ~ TWN-9 PIEZ-1 .. MW-19 • 1. .. ., PIEZ-3 .. 'OTW4-1IbTW4-11 OTW4-13 TW4-7~-8 OTW4-1 OTW4-40TW4_14 ~ TWN-11 ~ TWN-14 ~ TWN-12 Mw-h5 ?I TW4-23 OTW4-6 o J:ETW4-26 ~ I '-b MW-33 __ MW-34 MW_ ? ?--1"'. MW-03 • MW-20 • MW-17 • 33 PIEZ-4 .. /l-.:::::--==-~-=--.--<'/ -- /7 ~ PIEZ-5 .. T37S T38S ~ .::-... --=--..... ~-=--=--~ ~ ¢~===~4___ # ~_4 ---=--=--=---# ~ ---=--=--=--=-? 3000 If wildlife pond - HYDRO GEO CHEM, INC. APPROVED SJS MW-22 • II // // // // // // // // // // SITE PLAN AND PERCHED WELL LOCATIONS WHITE MESA SITE DATE REFERENCE H:/71BOOO/feb11 Iwelloc1 O.srf ~ ~ c ~ '" FIGURE TabB Field Data Worksheets Quarterly Sampling Mw,"Groundwater Discharge Permit '\ Date: 03/22/2010 Rev. 6 , Groundwater Monitoring QUlIlity Assurance Plan (ClAP) J " : . ATTACHMENT J I OENISonj ~l WHITE ,MESA URANIUM MILL . ,,,l ..... ~IN.I:,S, .. : FIELD DATA WORKSHEET FOR GROUND WATER Attachment I ,1 . , {~. See umruction Description of Sampling Event: I yT"l Qvo.C"'\·et" 'i"ra o,,)t\4Vio..tcl' ;U:>10 Location (well name): .... 1 _--,,-M..:.:W=-~ .... I _______ ~ Sampler Name and initials: i-r,./'Il\cr H~II;J~>.J/·nt Date and Time for Purgind illig /!l.91D and Sampling (if different) Well Purging Equip Used: I rnJpumpo@ baiJer Wen Pump (if other than Bennet) IQt!o I I J\\W";Jg Prevo Well Sampled in Sampling Event L......,; ________ ~ pH Buffer 7.0 I . ]. 0 Specific Conductancel q~~" ' IIlMHOS/cm Depth to Water Before Purgin~ b.5. 50 Conductance (avg) pH Buffer 4.0 I. Li,. () Well Depth(O.Olft): tilg.DO, ,I Casing Volume (V) pH of Water (avg) 4" well:1 0 '1<-65311) 3" Well:_ Iq.~~.(.367h) ~.tli Wen Water Temp. (avg) Redox Potential (Eh)1-1 ..... :3:..;;;:5:.;,.'1_---1 TurbiditY,-1 -=...;.1..:.lS_---I Weather Condo Ext'l Amb. Temp ... c (prior sampling event)1 SCG I Time I 150~ I Gal. Purged I 40 .. 1'1' I Time , Lbil I Gal. Purged I I-},O.36 I I.,.. 1~'6 Conductance ,. 19.9'1 I pHI b,Q7 I Conductance I I~$"-I .] pH I b'l'7 I Temp. "C I 1~·4-{ I Temp.oC I' 13;«7 I Redox Potential Eh (my) I 3bl I . Redox Potential Eit (mV) I . .~S7 I Turbidity (NTU) I ) .1 I Turbidity (NTU) I . 1. ~ I .. Time I L~I6' I Gal: Purged I 4.10· S1 I Time I 1$)13 I Gal. Purged I 'iO.7~ I Conductance I I~~~ I pH I b .~l I Conductance I I~~; I pHI b..1b I Temp.oC I "'3.'n I Temp.oC r E J3 .i¥ I RedoxPotcntial Eh (mV} I '54~ I Redox Potential. Eit (mV) I '31.J~ I Turbidity (NTU) I J .. ~ I Turbidity (NTU) I L~ I White Mesa Mill ~d1)ata Worksheet for Groundwater ~ 1 of2 capturx' cO ..... Tt.lE WITH..-4"'~'UNCT'ONAIiTY MiP -~GroW1dwater Discharge Pennit '\ , Groundwater MonitorIng Quality Assurance Plan (QAP) , ) Date: 03/22/Z010 Rey. 6 Volume of Water Purged I '-Ii .~3 gallon{s) Pumping Rate Calculation Flow Rate ( ), in gpm, Time to evacuate two c~sjng volumes (2V) S/60 == • ;;ti7 T=2V/Q== I ;7'7 • .58 I Number of casing volumes evacuated (if other than two) If well evacuated to dryness, number of gaJlons evacuated Name of Certified Analytical Laboratory if Other Than Energy Labl AwIH-I sd ~"o(.~ Sample Taken Sample Vol (indicate Type of Sample if other than as y N -specified below) VOCs ,.~·m : '.': ElL 3x40ml Nutrients :m ':.' : i':~::tii·:·~ lOQ rilJ .. He~_vy Metals " J~t ,:: .. '>IE!' ::' 250llil . All Other Non Radiologies . AJt " ~D ' 25.0ml GrqssAJpha rj} _0 -';, 1.000 .ml Other (specify) Iil-' ... ", 0 ~Sarnplc volume 1·/-,-,-' 't; :. , (,.~(\U(A. \ ::t~cCarn\l.~ . i ~ ~ ~ ~omment Whit@ Mes;! Mill '1i!td'Data Worlcsheet for Groundwater ~ 1 ; Filtered Preservative Preservative Added y .-'0 : t:J -m ~ ',0 J' m O · : N Type y N fgJ' HCL -!:if ; P .'~ :.IPS04 1m' ... ' t '" • -J:;;J, D~' HN03 ~ " ,0; )i3I : No Preserv, [1 [J.' __ .- CO f'rN03 00-~ 0 , . , f.a [j [)l 1fpre~eTVative is used. specify Type and Quanlity of Preservative: ': ;; See instruction 2of2 captur}f COM'A"IU "'ITHA'''''&o-fU~CTI<>HAL''Y MiII-Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 ~ Groundwater MonitOring Quality Assurance Plan COAP) ATTACHMENT 1 .(JENISOn WHITE MESA URANIUM MILL Attachment 1 •. 1 • .:;"'i' Se~ instruction ~! . ""NES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: I 4Th Qv.o.rtlfr 6rllWl~lAX>:.k ~IO Location (well name):o-' ___ M--'-'-'w:-.--"';;l..-=-______ .... Sampler Name and initials: I /N'aCl'" HolI;J;~ /--rH Date and Time for PurgindL....-II_/t7~1 P-.... O_I_O ___ ---' and Sampling (if different) #111 ~~~--------~ Well Purging Equip Used:~pump o@ bailer Well Pump (if other than Bennet) L-I ....;Q;.:..e_o _____ --J Prevo Well Sampled in Sampling Event L.I_N_· _W_~ i). __ ~ ______ --I pH Buffer 7.0 pH Buffer 4.0 4·0 I Specific Conductance L-I ---:.~...;..1~_--J1 JiMHOSI em Well Depth(O.O 1ft): I 1";)..$. ~ Depth to Water Before Purgin~ 109. 7S Casing Volume (V) 4" WCJl:I.l~,L\3 j<.653h) 3H WeJJ: 0 (.367b) L....-....::;..._---' Conductance (avg) pH of Water (avg) Well Water Temp. (avg) I.. I:;.~Q Redox Potential (Eh)l ~'b(J TurbiditylL....-....:::o'--_-' WeatherCond. Ext'l Amb. Temp. "c (prior sampling event) I yo ( Time I 0Gt~l; I Gal. Purged I d.H .'\5 I Time I D't.!;6 I Gal. Purged I ~. J '7 I Conductance I ~,gC:, I pH I ~,,~ I Conductance I 37gg I pHI b.qO I Temp. ~C I 1"'3,2SD I Temp.oC I 1~.l$i I Redox Potential Eh (mV) I ~'J.D J Redox Potential Eh (mY) I 4~D I Turbidity (N~U) I 0 I Turbidity (NTU) I 0 J Time I QC\b, I Gal. Purged I ;25 .~~ I Time I D'l..sg I GaL Purged I ~s -'0 I Conductance I '.:£lSE> I pHI b.§Ci I Conmlctance I ~7liD I pH I to .S, I Temp. "C I 13.~1 I Temp.oC I 1"}.8'D I Redox Potential Eh (mV) I lj)p I Redox Potential Eh (mV) I 4;2.0 I Turbidity (NTU) I-0 I Turbidity (NTU) I 0 I White Mesa Mitt ir,'dflata Workshf!et for Graundwater ~ 1 of 2 captufX· (OM'ATlS," .. IT~A.,,·tW__fU"CT10".Lln Mill . Groundwater Discharge Permit .' Groundwater Monitorinl! Qu~lity Assurance Plan (QAP) ') Volume of Water Purged I ~b.OY Pumping Rate Calculation gallon(s) \ J Date: 03/12/2010 Rev 6 Flow Rate (Q), in gpm. S/60 = I . ;1.17 Time to evacuate two casing volumes (2V) T=2V/Q= I 11'-\. b.b I Number of casiog volumes evacuated (if other than two) If well evacuated to dryness, number of gallons evacuated Name of Certified Analytical Laboratory if Other Than Energy Lab~ .AWAI. I sd of VO(.5 Type ofSampJe VOCs Nutrients Heavy Meta Is All Other Non Radiologies Gross Alpha Other (specify) &efIeN-\ :t.nO~M~~ ~ ;:Connnent White Mesa Mill o:f!,..;O,jd'Oata Worlcslieet (or Groundwater .1'11'1 I~ • Ih~ Sample Taken Sample Vol (indicate Filtered Preservati ve Preservati ve if other than as .Added y N specified below) Y N Type y N . ' fiJ .. 0 '; 3x4(j ml , 0 :' ' . , .!&l' -HCL ~ 'p . -... , ~ , . -~. ' :£f , lOOml D,w til ' H2,S04 'IE fI.Q, ' , .. ,(.: J ...... .. t;l,I , ct' 250ml ~, 0 RN03 ,,1&1 . -u " , 'J~r .' 1:;1-. 250m} ):1: . : ,p',~ .0 }g, -, NoPresery. " ~ 00 ' , ,0:' 1,000 mf tE., 0 HN03' ~. 0 ' .' .. I " : Sample volume: r , EJ [j ,~.f, IiI . ' CJ: ~ .. , ' , -.. . , .. ,-.d If preservative is used, specify Type and Quantity of Preservative; d See instruction Depth o.,+l-cr pVJ"S=-wa.s. 11875 . 20f2 capturx CO"P""81~ I'll~~."'ri>--FuNCTIO""lI~" :> t, Mill ' Gro!mdwater Di5charge Permit <lroundwater Monitoring Quality Assurance Plan (ClAP) ) Date: Q3/22/2010 Rev. 6 ATTACHMENT 1 . OENISO,/) Jl WHITE MESA URANIUM MILL Attachment 1 ,~::i See instructi\JJl . IN~ _J FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: 1 :P'h tj""o.rlu (,.ro.)J\cA\.N~1c.r a.OIO . Location (well name):,-' .'"--'M'-O;.;w;...--=3""---______ ~ Sampler Name and initials: 1-r"'/lII(.I~ lic)lI.a"''c1l/iH Date and Time for Purgin~'_I!-!.t/;...:I~q.;..:/a.;..;..O_I~ ____ __' and Sampling (if different) AiIA Well Purging Equip Used: []!]pump o@ bailer Well Pump (if other than Bennet) Sampling Event I S, e,p"i \ o..OfIW (,.\;.1 Prevo Well Sampled in Sampling Event I 1'1\ W· 3/~ pH Buffer 7.0 '1 ·0 , pH Buffer 4.0 Y.u Specific Conductance I qtjq I .... MHOS/cm Well Depth(O.Olft): Depth to Water Before PurgingJ 83. 3'1 ., Casing Volume (V) 4" wen:r....,t"'~/A:;.:.· _-.f1('653h) 3" Well:, ~Lii J367h) Conductance (avg) 57.51' pH of Water (avg) IL..o....., _b.;;..~ .;.; .. 3;..:~~~ __ ---, Well Water Temp. (avg) I 14·'i'?> ., Redox Potential (Eh)1 y).:, T urbidity!""-'O=--___ -'--' Weather Cond, I,' ~' _ .?"'r~\.a GtQu.o~ Ext'l Amb. Temp. °C (prior sampling event}1 ;J."l. Time IOCjL\Q I Gal. Purged I 91% J Time f Oqij I I Gal. Purged I ~ ·5" I Conductance I ·J;.7~, I pH f b.3C I Conductance I ~71)D ·1 pH 1 ., 33 b · 1 Temp.oC I 14.Li~ I Temp.oC I }\1 '''\~ I Redox Potential Eh (m V) I tj'-S I Redox Potential Eh (m V) I t..IA~ I Turbidity (NTU) I 0 I Turbidity (NTU) I Q I Time 'I O'ljf. I Gal. Purged f' ". 71 I Time I bq,,\~ I Gal. Purged I . 9 '1$ J Conductance I 51~'3 I pH I b.'?S I Conductance I 5159-.. -I pH I '·3.£, I Temp.oC I 14 '~6 I Temp.oC I il.f "1'3 I Redox .Potential Eh (m V) I ~;I..~ I Redox Potential Ell (mV) I j;,2o I Turbidity (NTU) I 0 I Turbidity (NTU) I ' <' 1 .1 White Mesa Mill ~>[)ata Worksheet for Groundwater I=~ 1 of2 capturx' COt.!PUIU£ .... ,T~..4."'·n,_F"NC1l0NAI.ITY MiU ' Gr~ndwalf'r Disl:h~rge f'1!rn'lit O~te: 03/22/2010 A.~. 6 QtolJl1dwatll1' Mooiloring Qu.tity Al~urancl! Plan {QAPI Volume of Water Purged I i 0 , -.to Flow Rate (Q). in gpm. S/6() ""' I . ~O 'l> gallon{s) Time to evacuate m'o casing volumes (2V) T""2VlQ=ly'6;Ol, I Number of casing volumes evacuated (if other than two) If wet! evacuated to dryness. number of gallons evacuated I Name of Certified Analytical Laboratory if Other Than Energy Lab(AVJAL\ ~e.+ !£\JOC~ Sample T akcll Sample Vol (indicate Filtered Preservative Type of Sample i r other than as y N specified below) Y N Type VOCs C! ,,0 , . 1~4o. !ril' .. I.'" ~[):; .~' .. r.lil:: Hr~ , .' Nutrierlts ';',.:.~~~. ,,\_:o ,;;!.~ lOl)mt '.,,0'/, 1'" '-.fij '~ , .-~ -, , l:US04 Heavy M~tnls . :'. EiI:~'., i-:::N'J1!':~ 250 nil '""~'--.. .O.~,. 1:,IN03 .' .', , Preservative Added y N " llJ ' , .. ·0:;0 -': .' III '.' , I;J }'81' .'.:, ;'10 . i '" All Olher Non Radiologies Cil ~\ r ·;.J~O<'; 250m} Gl .... ,ttl NoPrescrv. 'D ,, ~ .. ail ' . ..,,"p . " . , . . :1' Gross Alpha --, .~", '. 1!.Cl ~ . ] QOO.nij . til ?'. '" ,!2l T. HN03 ~ , ...~:. (J -I..Ii 1'-s~ ~ ..... -; Other (spedfy) , , • ',1.1 Sample volume " ., '''' IS)-',. t(: ' ", " .m (;{:. " ~ , , I·~~·)J '" !,,~. ' ~'. i: '~;--, I -. ' .. i: .... ~. .. &c::n<..f~l :IJH,or ~ o-.n ;,,:> ffpr~scrvalive is used, specify Type lind QWllltity of Preservative: :; II ~-~ ~ iComment ".,; See instruction Ar~',v~A. 01"\. ~(+C 6'.+ o-rSl1 ,. ~(1rre(' q.nJ. &o..rr.f'I p,,'("~eI\1 t?o fv..,~~~ £\nJ. :SQrv1.rl:7J (v~nr ~ ·eAt"'~-<. bc-.j~. ~t . ,?35.5. 1> ~~~.~ li->ctl for c... -t~t-~{ o-t .50 M~r\lxt~. '0",,+a \1)~ M.I'lc,H~ c.lco,,. +hro~o~\-pW"~e. .. pur~c.,.. cnAe~ o..flA .S'l.fflpkS Wucr (LOO eohJ . 6..+ O~L\5" Le\t ~}k tj:.t O~.5fL D e~" "-q ~ r ? (j. r~ -<:. Wo..s '/,1. 53 -' White Mesa Min ~ l , , ~d-oatil Worksheet for Groundwater ~~ 2 of2 captur,x' CO'''.~TI~U WIT",.4.",,n,--fUNCTIONAlITY Mill • G.,oundwater Discharge Permit G,ountiwater Mollitoring Quality Assurance Plan (QAP) ) o,Ue: 03/22/2010 Rev. 6 . I ! i: o " " ~. A TI ACHMENT 1 !(lENISOn WHITE MESA URANIUM MILL Attachment 1 ; f See instru.:lion .,1. MI~ES _ FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: I lorn Ouo"der (,CQlNl<lVl.tJer ~OIO Location (well name): ..... ' ...:..M.-!...!.;W:...--:3..:..:A~ _______ -I Sampler Name and initials: I -(.;nner )/oll,,",4d/rH Date and Time for Purgind ll/lq !:J.,() \0 and Sampling (ifdifferent) I 11/~/{}.Q1D Welt Purging Equip Used:~pump o@ bailcr WeI] Pump (if other than Bennet) 1~(Vu1?:;;... :;::0:....-__ ---' Sampling Event' 5>el"l~""nnVA\ Crw pH Buffer 7.0 Specific Conductancel q'1Q I~MHOS/cm Depth to Water Before Purgin~ ~S -40 .1 Conductance (avg) Prevo Well Sampled in Sampling Event I-I_M_W_-_' ---:,---.;... __ ... pH Buffer 4.0 4.D Well Depth(O.(}lft): Casing Volume (V) 4" well:' <O0~ '1(·653h) 3" Wel1:1-__ ~_v=--_...J(.367h) pH of Watcr (avg) 1L-'--.,;:b;;...~.:::..;>'.;..:I __ .......... _--t Well Water Temp. (avg) I~.OO .1 Redox Potential (Eh)I ..... .....;;4....;.1.\...;...\ _---' Turbid ity '-, -"~..;;b~....-...J,I Weather Condo Ext'! Amb. Temp. °C (prior sampling event} I I tiL I Time 1004& I Gat Purged I 'l,36. I Time , Og~~ I Gal. Purged I q .s~ I Conductance I b~i I pH [ &,.2.3 I Conductance I' 'O.;t~ I pH , . '.;2() I Temp. QC ~·OO I Temp. QC I 1,;?D3 I Redox Potential Eh (mY) I ~~I I Redox Potential Eh (mV) I :!:t'f I I Turbidity (NTU) I .b I Turbidity (NTU) I _6-I Time I Ot<L.ji , I Gal. Purged I ~,Z2 I Time I 6~':ig I Gal. Purged I q :i 2 I Conductance [ ~03b I pH I 10.2=1 I Conductance [ "030 I pHI 6.a.1 I Temp. "'C I j'?>.C>o I Temp,oC I J~,q1 I Redox Potential Eh (m V) f j g;t. I Redox Potential Eh (mY) I '143 . I Turbidity (NTU) I "S I Turbidity (NTU) I ·5 I White Mesa Mill ~d'Data Worksheet for Groundwater &!'~ lof2 capturx' co .. ~~rlll~ IO.TH"4.,,,n,,--FUNttlDNAlIU· Mill • Gltlundwater Discharge Permit Date: 03/22/2010 Rev. 6 ,Gl.oondwater Monitoring Quality Assurance Pian (QAP) Volume or Water Purged I 10, '-4D Pumping Rate Calculation Flow Rate (Q), i~gpm. S/60 = I .lO~ gallon{s) Tjme to evacuate two casing volumes (2V) T=2VJQ= I "O.~7 I Number of casing volumes evacuated (if other than two) I. bS If well evacuated to dryness, number of gallons evacuated i.0·, '10 Name of Certified Analytical Labomtory if Other Than Energy Lab~ AVJIlL.. He;{ ~ vOc.:;,. Sample Taken Sample Vol (indicate Filtered Preservative Preservative Type of Sample if other than as Type Added y N spe<;ificd below) VOCs ijl . . ., ':0 3x40ml Nutrients .$. ... , r::r '.' )00 nil Heavy Metals ~J.' : 0 '" . " 250ml All Other Non Radiologies .!~: ~~,: ,m 250 ml Gross Alpha ~.i~. 'C) , 1,000 mt Other (specify) -.' Sample volume ii1 O · Crd\~t :ri'\o('~o..A\ c.. S ~Comment y N .[J ~ ' .. . . .. "'.q~ , ~", ;~. 0 -. . -0 ~ . . .~ .. .. 'm' " '0.,'. ! [3 IXJ " y HCL '~'" fC2S04 ~. .'. HNO~ .:~·(~t NO Ptese!V. D. AN03 ~. '0 'f preservath'e is used, specify Type and Quantity of Presenrative: " See instruction ;!" Af'r'~~ on s.i\~ ~t 015'1. '1':.l'Incr Q."J" &c..tr.~ 011 5l"h~ .rot'"' rW'~(. MJ. 5.t.tl'1fl.'''j f!ut;.nf f'u,(~<' bet\~ 0;( o~OO. Pu.r~ec\ \Vt!l\ ~or 0.. hta..\ ot SI:> "-CI'Il.A.te>. Ylow R....t~ ~c.c:.rc~(.~ V-Il.\-~\ ~c:=.1l Ro..l'\ .Dr~. \Vt:ll R4t1\ J.na--A.t 08..50. '-e.~ site ~:t "'1.58 N 0 .' '0 '0 '~ ... : ...0 ~' \0o.\~ ~~ ~o.st\~ c\Cl4.r ~ro~ov..~ p~~c ' , '. _ .' ~l-r.-"~ on .).,).e. ~-t Ot1~ "1:..fI,iV 6.ntk G-~r("11 . 01"' ~I+G .ror ~"'N\r)l\J e\lCflt. laoK Dcpt~ h \li)o..t-er gs.72 ~q.~ I~ \o.)cr(.. }",l<.Q\ /i"t oQ'1(). i..~B-~1+L. ",t-O'Ui~, . White Mesa Mill , "d>Oata Worksheet for Groundwater ~ 20f2 capturx' CO,.PA"UE wlT"/..:'t,,,,ri:>-FUNC"ONALITY Miff '/Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 ; Groundwah!r Monitoring Qualitv ~surance Plan (QAPI r t " .. :: ~ ; ;OENISOJ)j~' ATIACHMENT 1 WHITE MESA URANIUM MILL Attachment 1 ~ See iustruchoo .J MINES L ._",_.~, ~._~"-'-~_._._ FIELD DATA WORKSHEET FOR GROUND WATER D~~~oo~~~~gEw~: ~1~~~~~Q~vu~~r~t~~~~~~6~n~)~v~~~~~~~ut~~~~~~7~P~\O~~~~~~~~~~ Location (well namc)~L...: ;;~...ww~-_Y-l-_______ --J Sampler Name and initials: P.dM 0-I be I Date and Time for Purgind ,1/ ,61 "0 I 0 Well Purging Equip Used:OOpump o@ bailer Sampling Event I 1>' ~M.I 6\.,...WfJ \ y v..I pH Buffer 7.0 ~I _-''':''':'~()~_-J Specific Conductancel,...l _q.J..'l ..... t..LI __ ~I~MHOSj em Depth to Water Before Purgin~ 72« 'to Conductance (avg) and Sampling (if different) Well Pump (if other than Bennet) Prevo Well Sampled in Sampling Event l.I"\w--:l ·6 pH Buffer 4.0 y .o Well Dcpth(O.Olft): 11~3. 60 . Casing Volume (V) pH of Water (avg) 4" well:1 1(.653h) 3" Wel1:.I------1(.367h) WelI Water Temp. (avg) Redox. Potential (Eh)1,...1 ___ ~ TurbiditYL..1 ___ ~ Weather Condo Ext'l Amb. Temp. °C (prior sampling event) I 5 0c Time I '3'15 I Gal. Purged I I Time I...,. Gal. Purged Il-__ ---J Conductance II~SQ I pH I 6 .'1" 1 Conductance I, ,&1 pH ~_"'------' Temp.oC 11Hy Q '7 I Temp.oC I J P g Redox Potential Eh (mV) I 3'1 J.. I Turbidity (NTU) l'3~Q I Turbidity (NTU) Time I..I!IIIEI'" I Gal. Purged I I Time I: L Gal. Purged .... 1 ___ ..... Conductance I , I pH II' , I Conductance Temp. "'c fif I 1 Temp,oC Redox Potential Eh (mV) I -I Redox Potential Eh (mV) I . i Turbidity (NTU) I3id: I Turbidity (NTU) WhiteMe~Mm :iT.'d:?IJta Work~heet for Groundwater f!,~ 1 of2 capturx' COM ... flSlE W'TH,d''''Ii>-"'UMt1l0HALlTT Mm -·Groundw.ater Discharg~ P~rmit Date: 03/22/2010 Rev. 6 . Groundwater Monlloring,Quality Assurance Plan (<lAP) VolwneofWaterPurged! L-____ --..J gallon(s) Pumping Rate Calculation Flow Rate (Q). in gpm. Time to evacuate two casing volumes (2V) S/60 = .... 1 ___ ----' T=2V/Q= I I Number of casing volumes evacuated (if other than two) If well evacuated to dryness. number of gallons evacuated Name of Certified Analytical Laboratory ifOtber Than Energy Lab' l5ei fOe tl wA/.c: I Sample Taken Sample Vol (indicate filtered Preservative Preservative Type of Sample if other lhan as Added y N specified below) Y N Type y N VOCs I!SI :/ 0 ~x4Qml 0 Ii] HCL .&.1 JJ .. - Nutrients 'is! 0 100m! 0 S H2SO4 S ' 0 Heavy Metals iii O . 25QmJ ti 0 flN03 !iii '0 All Other Non Radiologies g 0 250ml 0 Sl No .Preserv. 0. 0 'g Gross Alpha iii :0 1,OOO'ml 181 IJ RN03 iii 0 . Other (specify) 0 0 Sample volume 0 ~ 0 ~ 6~Ln:.1 't. ~ ",.. .!)~ A. i ..:..s IfprcseJVative is used. specifY Type and Qualltity of Preservative: ~ 1· .•. $. See instruction ~Commcnl ,...,..., Arrivl../A 0"" .:Ij·tc.. ",t 13~O. (j" .. c-r,oIIo ~",\ .... ~ ff'~s~~+' .fl.r-SA,-p\i"'~ c:.vc.oI\.~. Pc:.""""",,~T~"$ ·~oC."'L +"\4GA ~\-'3'"15.. ~~~,lu: WI!..r-, +~"Ke. .... ",,-to 1350. \,JtI.-hw' a..J1i-s, c:.'~c:..~ ;\-~ ... ev~~('.Iv\' S"-M')\'''3 e.V~J\·"" /'L-~,$,"c.. ~+-''-Its, •. . ;t :: ;; White Mesa Mdl ~d'Oata Worksheet for Groundwater ~ 2 of 2 capturx' ~"Io\'ATIIU "UH.,.4-."'~F\IN<TJO~.Ll1' Milr· Groundwater Discharge Permit Oate: 03/22/2010 Rev. 6 Groundwater-Monitoring Quality Assurance PI~n (QAPI ATTACHMENT I Attachment 1 I>ENISO,})~ J: WHITE .MESA URANIUM MILL c'j SIX iuslruction MINES FJELD DATA WORKSHEET FOR GROUND WATER . ..... Description of Sampling Event: I '1Ti, Qy.c..c\-<r G-rDWlJ.lA)o-.r~ ~Ol() Sampler Name Location (weIJ name):1 MW-.5 and initials: I...-r.;",,(r '~oiliJ(..a .... 1'" Date and Time for Purgin~ I t/illio '0 nnd Sampling (if different) IL,!::N..:.;I'A:.J.-_____ --I Well Purging Equip Used:@pump o@ bailer Wen Pump (if other than Bennet) I Q E .D Sampling Event I .sem, 0Dr1Y'o..) trw Prey. Well Sampled in Sampling Event I "" w 15 pH Buffer 7.0 pH Buffer 4.0 Specific Conductance II-__ 4""'£t:,..1J;..·. ______ I ~HOS! em Well Dcpth(O.Olft): 1138.50 Depth to Water Before Purgill~ 106.,5 Casing Volume (V) 4" wen:I-;i.O/f. rl " 1("653h} 3" Well: 0 (.367b) '"---------' Conductance (avg) pH of Water (avg) 7.3i Well Water Temp. (avg) I 19 "tt~ Redox Potential (Eh)1 ~()O Turbidity I I ~ .5 Weather Condo Ext'l Amb. Temp. "C (prior sampling event)1 .5 (I G Time I tsO{) I Gal. Purged I ~I .~ I Time I \,SOt I Gal. Purged I 'II. 'i't I Conductance I k,.'3 I pH I 7.31 I Conductance I ~.~ I pH 17.33 I Temp.oC I 14·93 I Temp.oC I ILl .Lfb I Redox Potential Eh (my) I 3nl I Redox Potential Eh (m V) l ~OCl I Turbidity (NTU) I 14 ., I Turbidity (mu) L 'l~.O' ] Time 115Qa.. I Gal. Purged I 41 ,(,b I Time l 1563 I Gal Purged I "i/> kg "' Conductance I ~.?. I pH17.3d 1 Conductance ( "·3 I pH 17.31 I Temp, DC I IY·Lf'i I Temp.oC I J I.{ ·'iY . I Redox Potential Eh (mV) I ~t{~ I Redox Potential Eh (mV) I J.;j~ I Turbidity (NTU) I 11,'Q I Turbidity (NTU) I 1.1.1 I White Mesa Mill *d>oata Worksheet for Groundwater ~ 1 of2 capturx-COIII'AtIBL£ WITHA ... ·,.z,.--FUNCTlO""lITY MflI ':! Groundwater Discharge Permit Dat~: 03/22/2010 Rev. 6 • Groundwater Monitoring Quality Assurance Plan (OAP) Volume of Water Purged I ~;}.. .31 Pumping Rate Calculation flow Rate (Q), in gpm. S/60~ I .~\7 gallon{s) Time to evacuate two casing volumes (2V) T=2V/Q~1 1'1<1..1)9 I • Number of casing volumes evacuated (if other than two) If well evacuated to dryness, number of gallons evacuated Name ofCerlified Analytical Laboratory if Other Than Energy Lab! AWAl I ~C::t or; VO(S Sample Taken Sample Vol (indicate Filtered Preservative Preservati ve Type of Sample if other than as Type Added y N specified below) y N y VOCs I:!I '0 3x4Qrnl -0: " Qa HC.L tW Nutrients ~ ,0 lOOml 0 ~ fUS04 . OJ' Heavy Metals ~ 0';;1.. 250m} ~: .-_.' p ffi\r03 • <i .... _. : ~ ~. All Other Non Radiologies l'i). . 0 250mt 0 fiJ No Pr~serv. 0 : Gross Alpha 'aJ 0 'l.000ml ag '0 HNO;3. liI, - " . Other (specify) ijI CJ' Sl,Ullple volume 0 ,Ill 0 &eneJ"o.t :tho('~,¥,n:c. '.> If preservative is used, speoify iConunent Type and Quantity of Preservative: , See instruction ,:)/ Arr;IJ~~ Or\ :si-+~ <>-t \\t1b. r<\nn~r ~oll~tla~ p1'~cJtt --tor p~"~c: iNJd ~<UY)p)'j 6Jc:nt. p~~ b~1\ 0..1--lt50. PlAr~e<l ~cli tor Q.. +ot"" ~ ''\5 M;~~e.). \Vo..+cr n~ vc:r~ \,\tk "c:;i\ef"\;Qt'\, Pv.r~~ ~nJ~l !VIA .5C.\~pk5 wac: coJI«:teJ ~-i-J.50b . Le\\-!)itc ~t 15f1. WiYlJj oJ J;1\'t c\' SctMple, D-cp+h o..ttcr fV.('~C:: W(AS 1~.9b White Mer.a Mill N 0 0 '0 f$l 0 ~ ~d-oata Worksheet for Groundwater ~ 2of2 capturx' co ....... <£ WITH~.",..r-'U"CTIO""lITY MiII-Groundwater Discharge Permit ) Oate: 03/22/2010 Rev_ 6 GroL'n~ater Monitoring Quality ~surall(l! Plan (O,AP) ) ATTACHME~T I Attachment I : ()ENISO..!)~ J; WHITE MESA URANJUl\l MILL : /-'; See in~llJI:liOl1 A_<_.-~~§"" __ ~~~_,, FIELD DATA WORKSHEET FOR GROUND \VATER Description of Sampling Event: I ~Th Q\Ao..rter &ro~nA~o..te;(' ;t..D1() Sampler Name Location (well name):1 MW -1\ and initials: I 17",Oc.f HoUi4q,/ Date and Time for Purgin~ ,\ III /;;"0 10 and Sampling (if different) ./II/Pt: Well Purging Equip Used:~pump o@ bailer Well Pump (if other than Bennet) I QED Sampling Event I S ~M i "'1\"u..~1 6-W Prevo Well Sampled in Sampling Evont L.1_N_W_I_~ ____ .;....J.1 pH Buffer 7.0 -/.o Specific Conductance] , 499 ! .. MHOS/em Depth to Water Before Purging ~q. '11 Conductance (avg) pH Buffer 4.0 I '. ~-O Wen Deptb(O.Olft): laD._oO J Casing Volume (V) pH of Water (avg) 4" well:i ?.{,; 4, 3" Wen: 0 ,('653h) (.367h) WeIlWaterTemp.(avg) l1H,:g6 .1 Weather Cond. I P".r\·I~ (.jo~~ Redox Potential (Eh)1 3n Turbidity .... 1 --"'0:<.--_-' Ext'l Amb. Temp. ac (prior sampling eventH 11~ t... Time I )hlO I Gal. Purged I ~. O~ I Time I 1.211 I Gal. Purged I 5::t ,..2Ci I Conductance I qc,q .O I pH I 7 .4~ I Conductance I q~;,.O I pH I Z'-ll( I Temp.oC 1 IL\-.30 I Temp.oC [}L[5i I Redox Potential Eh (mV) I 333 .--I Redox Potential Eh (m V) r :32.5 -I Turbidity (NTU) I a . I Turbidity (NTU) I 0-I Time I \;tl~ ] Gal. Purged I ~" . .5 \ I Time I t~l~ I Gal. Purged I ~.13 I Conductance [ ~bl·Q I pH I 7.yq I Conductance I !lbl,.g I pH I 7~4'1 I Temp. "C 1-, 19·31 I Temp. "C I IQ.30 I Redox Potential Eh (mV) I ~17 I Redox Potential Eh (mY) I 31,5 I Turbidity (NTU) r 0 I Turbidity (NTU) I O · I White Mesa Mill ~~i)ata Worksheet for Groundwater ~ 1 of2 capturx' CO"""T'.~E W[11t4~""tV-FUN'T'O~A~ITV MiII-Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Grm,lndwater Monitoring Quality Assurance Plan (o,AP) Volume of Water Purged I .52 .. ibS gallon(s) Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = I . :l17 Time to evacuate two casing volumes (2V) T=2VJQ= I ;tY3Al7 I Number of casing volumes evacuated (if other than two) If well evacuated to dryness, number of gallons evacuated Name of Certified Analytical Laboratory jfOtbcr Than Energy LnbJAW/\L \ ~et o~ VOt-S Sample Taken Sample Vol (indicate Type of Sample if other than as y N specified below) VOCs m 0 3x40ml N~trients IJa 0 HJO.m:l Heavy Metals ~ O· 250ml All Other Non Radiologies "\0 Jig Dc, 250mt Gross Alpha HI :£;1 i,ooo ml Otber (specify) ijl ·0 Sample volume &ef\~\ ::rnor.:\M'c,S ~Commcnl White Mesa Mill ~d'Oata Worksheet iOI Groundwater f!!~ , Filtered Preservative Preservative Added Y 0 ... 0 fil e 0 f$I 0 N Type y N :t5!I HCL ~ 0 :~ H2SO4 lil D P HN03 riI 0 III No ePreserv. q ~ '0 RN03 ~ 0 6J .b Bl If pre!;ervative is used. specify Type and Quantity of Presen'ative: ,~' See instruction 2 of2 capturx' <O"~AT'''l W"H.r4 • .?'tV-FUNCTIOH~L'TV Mill· Groundwater Discharge Permit Dale: 03/22/2010 Rev, 6 .' '~roundwater Monitoring Quality Assurance Plan (QAP) A TT ACHl\lENT 1 ~OEN ISO,l) ~. WHITE MESA UR.-\NlUM !\lILL .L 't!!~IESt ., ... ~ FIELD DATA WORKSHEET FOR GROUND \VATER Attachment 1 .' ;~r,4? St.~ instnu!tion Description of Sampling Event 1 ~" Qv.t>-rtif Crr~Wlq.wq.Sf(!r ;1..010 Location (well name ):l,--.;;..M_vJ_-.-.:J~~~ _______ ---, Sampler Name and initials: I ~{.lfII\U l-loll:J\A~/'nt Date and Time for Purgin~ 11/11/{)'O'tO and Sampling (if different) 1l/1~/~610 Well Purging Equip Used:OOpump o@ bailer Well Pump (if other than Bennet) Sampling Event I MvJ .. :1.3 Prevo Well Sampled in Sampling Event 1... ___ ---' ___ --1 pH Buffer 7.0 7. ~ pH Buffer 4.0 . yo Specific Conductance 1-' _'f-.:'1:..J.Q_-'--.--.I1 !J.MHOS1 em Well Depth(O.O 1ft): l30."\t> ., Depth to Water Before Purgingj ,og .b~ Casing Volume (V) 4" Well:, 1"l·l3 i('653h) (;) 3" Well: (.367h) Conductance (avg) ·1 pH of Water (avg) Well Water Temp. (avg) , )"t. b~ Redox Potential (Eh)1 '107 Turbidityl , 34.~ Weather Condo Ext'l Amb. Temp. ·C (prior sampling eventl l 1 Cc. Time I l'tiDe) I Gal. Purged 1 ;J..3$7 I Time I NO\ I Gal. Purged I :d-.Lt D 8 I Conductance I ~?.c;.D I pH I <:. . .51 I Conductance I Lj).5j I pH I b .4/K I Temp.oC I Jt; bO I Temp.oC I ii c\,;.t, I Redox Potential Eh (mV) I 40<:, I Redox Potential Eh (mY) I YD7 I Tw-bidity (NTU) l la7 . .3 I Turbidity (NTU) l 13;·$ J Time II~06 I Gal. Purged I.l. 4. 5 D I Time I H'D'~ I Gal. Purged I i9. 5 a I Conductance I 'i~3 I pH I ~ ~g I Conductance I Y~ I pH I 6·47 I Temp.oC I IY·7D I Temp.oC I N .7C:. I Redox Potential Eh (mV) I ~O1 I Redox Potential Eh (mVl I 407 I Turbidity (NTU) I 1~g,1 I Turbidity (NTtJ) I 1'3'(.;:2. I White Mesa Mill ~d'Datil Worksheet for Groundwat.er ~ 1 of 2 capturx' CO"HT'BLE ... ,r .. .,4.",ti:r--FuNCTlONA,tl' M~I • Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 • uroundwOIter Monitoring QualitV Assurance Plan (CAP) I Volume of Water Purged I ~ .~.s Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = I . ~·.l1 , gallon(s) Time to evacuate two casing volumes (2V) T=2v/Q=1 13().7~ I Number of casing volumes evacuated (if other than two) I· 1.75 If well evacuated to dryness, number of gallons evacuated I ~4.'l5 Name of Certified Analytical LaboratoIY if Other Than Energy Lab1 AWAl.. I 5d o·t;'\JOG> I Sample Taken Sample Vol (indicate Filtered Preservative Preservative Type of Sample if other than as Type Added y N specified below) y N Y N VOCs GJ ~ O. 3x40OO "0 JB HCL , ~' . Q.-=- Nutrients '~ .0 lOOml . ,0 00', H2SO4 In -0" HeaVy Metals (lI ,: cr .. ,2S0.ml .. ,fE .c· 0 M03 St ' 0" All Other Non Radiologies ~,''!t' ::m ,25:0,mt ' , q c' I!i1I Ng Presew. '0 , ,ri -~ Gross Alph!l BI 0 J,OOOml , ~ 0 -RN03 rB ':0 . Other (spccify) Ii) 0: ' Sample volume if 5a 0' , , , &enen'..\ J:flor~v..t\iL) Ifprese~lative is used, spedfY Type and Quantity of PreseJValive: ~ ~ ! .' .f See instruction ~Comnlent . ., Art'·ve.~ 01\· ~\-\-c. ,,-\ '~Ob, -1"1'1\(,(' cA.1"\~ &<>-r'r,,, 0('1 s :+~ \'cr rV.r~~ M~ $o-Mp'l ;~~ -eu~"t, PV-f'~~ bej€..(\ 0.:+ ~.10 , R~.r~J.. IJ~II for lit. +ot4,l oC' 115 MiflCA.\-eS plA,\\cJ. tJ-'e.II c.trj' Wo..+cj" Wu...s mv..r~~. PtJ.J'~(: en~ecl. lA.t 1'105 . lC!.~ s,fc cA..t l'f08. Ar(";\lt...!. 01'\ s:l<.. 0..+ IOOQl . "I",tln,-f'" ""d 6-""rr'''' prc:).enl ~f 5.4t""P1.'~ eye,,-\-. 'TooK. D~f'th +0 wo",+f!,r 10$ ,'71 • ~o....., r\c~ p"",lIe€.\ ,,-\-lO()S , L 02.~ .s.1~C c).-t lO~O . w",'h:;r \i.)Q.S s.};l\ A. l ;H k fwtv.t"!{~ / D~"+tl . White Mesa Mill fE ~d·Oata Work5heet fOl Groundwater t!'~ 2 of 2 capturx' ~O"'.TI.U WITH,.4..,rt--~V~CTlONALlTY Mill <Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (O,AP) ) OENISOJ) MNES ------ ATTACHMENT 1 WHITE MESA URANlUl\'I MILL FIELD DATA WORKSHEET FOR GROUND WATER Attachment I Description of Sampling Event: I y..c... Q lIo..f'~e.r-Gcov""~\.V"-h'·,,t'" .. d:o I 0 Sampler Name Location (well name):1 ".v\W -\y and initials: [ (;;c-..,.,..,.,.. &=' __ e~1 6P Date and Time for Purgind J' 1101 :lR j a and Sampling (if different) 1-1 .!..:AI.=--",/\~ _____ -, Well Purging Equip Used: [!Jpump o@ bailer Well Pump (if other than Bennet) 1-1 Q~EIM..I::Q:'--__ ---I Sampling Event Is Cee;' ..... M\.V;..\ GW Prevo Well Sampled in Sampling Event I.M"-' ~5 pH Buffer 7.0 ,-15-L..1.''':':o~_---..I pH Buffer 4.0 I 4.0 Specific Conductance .... 1 -'9L..J9 .... 9.L-__ .....lhlMHOSI em Wen Depth(O.Olft): II J.i. ,0 Depth to Water Before PurgingJ I 0:3. ';0 Casing Volume (V) 4" well:1 i 6 ! 3Cj 1<·653h) 3" Well : 0 . (.367h) 0......;:; __ ----' Conductance (avg) pH of Water (avg) Well Water Temp. (avg) I I~ .31{?5 I Redox Potential (Eh)1 4/'i .5 Turb idity 1-1 --l:::O::"'-_-I Weather Condo Time 1 1.510 I GaL Purged I ~~.,2 & Conductance 1.3'1 £;;1.. I pH I b ·W 1 Temp.oC I 1'1.33 I Redox Potential Eh (mV) I Lflq I Turbidity (NTU) I 0 I Time Il.sl~ I Gal. Purged I 2:~.~g Conductance I 3~~2. I pH I <;,'3% Temp.oC I ig·3~1 Redox Potential Eh (mV) I '~i5 I Turbidity (NTU) I D I White Mesa Mill ..... d'Oata Worksheet for Groundwater ~~ I I I I Ext'l Amb. Temp. 8C (prior sampling even~)1 Lj Q ~ Time I 151( I Gal. Purged I -;;;;".7 b I Conductance 13'173 I pH I ~.39 I Temp.oC I/Li33 I Redox Potential Eh (mV) I 4/~ I Turbidity (NTU) lQ J Time I 15}'c> I Gal. Purged I .33 .;A I Conductance, I yn~ I pHI b..:37 I Temp.oC I IY · :"b I Redox Potential Eh (mV) I 'i/5 I Turbidity (NTU) ! a I I I I / / Mill "Groundwater Discharge Permit Date: 03/22/2010 Rev 6 f>ioundwater Monitoring Quality A5SUlance Plan (OAPI Volume ofWnter Purged I ~3 . b3 Pumping Rate Calculation Flow Rate (Q), in gpm. S/60= I . ;11.7 gallon(s) Time to evacuate two casing volumes (2Y) T=2VJQ= !15 •• .>b I Number of casing volumes evacuated (if other than two) If well evacuated to dryness. number of gallons evacuated Name of Certified Analytical Laboratory if Other Than Energy Lab~ 41.0-'''''1.. 15--.. D~ Vc)o;.',S I Sample Taken Sample Vol (indicate Filtered Preservati ve Preservative Type of Sample if other than as Added y N specified below) y N Type y VOCs lB' 0 3x40 mJ 0 a HCL 'ta Nutrients ~ 0 100ml 0 SI H2SO4 gJ Heavy Metals ~ ,. 0 250ml jiI 0 HN03 19 All Other Non Radiologies fi(} 0 " 250ml 0 [g' NoPreseJ;\'-. -0 Gross Alpha ~ 0 1,000 mt S 0 HN03 .~ Other (specify) fia 0 Sample vo~ume 0 6tI P I' b iJ,..tA e, ,.". \ :t:AC>~q.. .... '~ If preservative is lIsed, specify Type and Quanttty of Preservalive' I ~ ~ ~ ~ommenl See inslruction 'I'" Af""h"'''~ CJ~ s .... "" """t I ~3"'. T.;..~"",~ ~l1i\''''o\.y o..~ {; .... ',..A -r~,-~ fl"c..£eA'" ~(Jr PcI:.>e.. Cc.~ "'e~.M(>I~~ C:-v",..,+" PV("je.. l><-~(.."" tl.t-11.'10, Pv.r~c~ wc.ll ~:-0.. ·h:Jo.l ot' }..5:S M inv..tc:>~ \tJ(A.-\,r t...».S C.Jcor th ,.o~},o~ ?v..r~e. . ?w-ef' enJe~ o.ll~ .Yr.r1f/C Va"<.. Co lI-<!c,tca;t '.515. Le-P) S 1 1-c a. 1-15;<{. Dc?-th o.I~cc pu-r~~ wOoS lOY. 05 Whire Mesa Mill N 0 0 0 l5J 0 iI . ., ~d'Oata Worksheet for Groundwater . I I_!f! /h.ulEl 200 capturx-COMPAnOLE WIT"..--4.",.t'i:;---FUNCT10NALJYv I Mill • ~.rofjndwater Discharge Pennit Date: 03/22/2010 Rev 6 <iro~ndwater Monitoring Quality Assurance Plan (QAP) ATTACHMENT 1 OENISO,.})i ~ WHITE MESA URAlVIUJ\l J\HLL Attachment 1 -j_~ ~MJ~_~_.. FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: 111'" Q~cJ'tCI" c:;,.ro~awo.+q ~bll) Sampler Name Location (well name):IL...~N.;..;.W~-.:..:15:::.-. ________ --' and initials: I ynM.I' HolI ,Jay -r: H· Date and Time for Purgin~ H/llI.loiO and Sampling (if different) ~I.v~/ Al.4-_____ -I Well Purging Equip Used: 00 pump o@ bailer Well Pump (if other than Bennet) L.I-.::Q::L..::.~-,D:::'-' __ ---I Sampling Event 1'::'~tyt;lAnf)lAo...l &W Prevo Well Sampled in Sampling Event IL..._M_W_J_I ____ ....J pH Buffer 7.0 7.0 pH Buffer 4.0 Specific eonductanceL..l--"-q .... 1 ..... <\~_---.JI~MHOSI em We1l Depth(O.Olft): 11:37.0D Depth to Water Before Purgin~ IO".=1h Casing Volume (V) 4" wen:/ 1£1-94 1(·65311) 3" Well: () .(.3671t) '--------' Conductance (avg) pH of Water (avg) Well Water Temp. (avg) 1'14.4"1 WeatherCond. I Pw+l() ~\o~% Redox Potential (En)1 4 ~o TurbidityL-1 ..Io:t.~O~--J Ext'l Amb. Temp. "c (prior sampling event) I Y ~ {.. Time 11l~ I Gal. Purged f 3'1.b.(, I Time I l1Q..(, I Gal. Purged I 3'1. ';).1 I Conductance 1'i3bQ I pH I b..55 I Conductance I ~5'=8 I pHI G.Sb I Temp. <:Ie 11'-;'50 I Temp.oe I Iq ·"'K I Redox Potential Eh (mV) 1 4M I Redox Potential Eh (mV) I 460 I Turbidity (NTU) I .J .. j . I Turbidity (NTU) l J& ] Time Iwp I Gal. Purged ";YL5Y I Time IIIU I Gal. Purged 13'1 .7' I Conductance I !i~b~ I pH l b.,!,b I Conductance I g3lX I pH I (:,·57 I Temp. "C I /iJAb I Temp.oC I ly.~6 1 I Redox Potential Eh (mV) I ~~ I Redox Potential Eh (mV) I 4,.20 I Turbidity (NTU) I 1·0 I Turbidity (NTU) I l.lJ I White Mesa Mill -&'\d1>ata Worksheet for Groundwater ~ 1 of2 capturx' COMPATltlLE W'TH A . ."zt:,-",,'CTIO'fALI" Mill . Grolindwater Discharge Permit ) Date: 03/22/2010 Rev. 6 (jroimdwater Monitoring Quality Assurance Plan (ClAP) } Volume of Water Purged I YO .. 1'-15 Pumping Rate Calculation Flow Rate (Q), in gpm, S/60= I .~17 gallon(s) Time to evacuate two casing volumes (2V) T = 2V/Q = I }~:3. ~W;;r I Number of casing volumes evacuated (if oth~r than tWo) If well evacuated to dryness, number of gallons evacuated Name of Certified Analytical Laboratol)' ieOther Than Energy Lab{AWAL 1 seto-\'\loc..s Sample Taken Sample Vol (indicate Filtered Pl"eservative Preservative Type of Sample if other than as Type Added y N specified below) y N y VOCs I .f$' .'0 3",40 ml O. 00 :tIeL 'UJ Ir " . Nutrients ijl 0 109ml t:J f . f:B ,H2SO4 ,elf Heavy Metals .0 0 250ml fit ,0 , HN03 ~ All Other Non Radiologies .~~ fjJ 0 2;50 ml ., 0" ~ No Preserv . 0 . . , Gross Alpha ftl, a I,GPO ml f$J ~ aN03 fll. Other (specify) tJ Sample vohmw ~.I, Hl 0 a;J 0 ,. }, - ("e.(lo.rOo.\ -r..OOr"!jf>./\;"~ If preservative is u1red. speedy ~Commenl Type and Quantity of Presen'alivc: .' See instruction ,~y. Arr;\)eA OIl ,$~+e tX\ O~~O , t:nn~r Ho\l',aQ~ t>-"~ &c>..('r'·" Pc,J~er On 5;~<. ~o; pUr~c oJ\~ ~1'1 1~ elJQrt. Pv.rje b~ ",-r b8'~S, Pv..c~ec,\ Well ~or fA +O~l eft I f{5 )~ ,fl\Ates . Wf>..+er \'\)().,S 0\t:o.. +h('bV.~()\x\ f>v..r~G, rw-~t:. cn~ea MA .5£AlYlples \tJe,~ t.olleLt!:~ 0..-1 H30, Le.\1 ~i+c ~t , 14-f~. De prh ",5;ter p v... ~ e w C\S IOGt;;L q White Mesa Mill N 0 0 O. fig 0 Ij;I ~d·oata Wor hheet for Groundwater Ia~ 2 of2 capturx' COM.ATIILE ""H,.,4.~,n,--'UNCTION.lITY .; .; • MiII ·.(jwundwater Discharge Permit ) Date: 03122/2010 Rev 6 Groundwater Monitoring Quality Assurance Plan (Q.API ) I A TT ACHMENT I ~OENISon~J ; WHJTEMESA URANlUl\I MILL Attachment 1 " ~y> See in~tructioa J ~IN,ES ....: FIELD DATA WORKSHEET FOR GROUND WATER Description ~f Samp[ing Event: I Li Th Q~o..,...+er GrolJ.,1\JlI.)o..fer ~O 10 Location (weB name):L.1 ___ M_vJ_-_·.:....;l.,:...--_____ ~ Sampler Name and initials: l"-;r\IIcr U"U,JQn/TH Date and Time for PurginJ 11I17/;toio and Sampling (if different) oeo Well Purging Equip Use.d:[f[]pump o@ bailer Well Pump (if other than Bennet) I QE..D Sampling Event Seft\I AAt\\I\",1 &w Prevo Well Sampled in Sampling Event I'-_M_W_._-_~ ____ __J pH Buffer 7.0 "·0 Specific Conductance 1 'i9'\ .. . . I ~MHOSI em Depth to Water Before Purgill~ 76 . ~ ., Conductance (avg) pH Buffer 4,0 4 .0 Well Depth(O.01ft): 11'6.-00 Casing Volume (V) pH of Water (avg) 4" well:1 ~'3 ,~ 1(·653h) 3" Well:. 0 . (.367h) Well Water Temp. (avg) I .1''''. :1(;; Redox Potential (Eh) .... 1 ---:.4 __ 1l_--, TurbiditYL.I--=o __ -, Weather Condo Ext'J Amb. Temp. ·C (prier sampling event)' SOc. Time I l":'&C ' '1 Gal. Purged I ~b ~b5. I Time I '~I I Gal. Purged 11.f b, ¥7 ·1 Conductance I ~"f7i ,I pH I (:;0 ·53 :1 Conductance I ~Zf77 I pH I '·57 1 Temp.oC I }I-/ .)...b I Temp.oC [ J~.2S I Redox Potential Eh (mV) I ~l/ I Redox Potential Eh (mY) I ~If I Turbidity (NTU) I 0 I Turbidity (NTU) L 0 j Time 1 1~5~ I Gal. Purged I 47 O~ I Time I 1],,53 I Gal. Purged I "11 ·30 I Conductance I ~~1.1! I pH I &'.$7 I Conductance I ::f~Uro I pH I ~5~ I Temp.oC I i'1·;),5 I Temp.oC I )~.;l.g I Redox Potential Eh (mV) I ql/ 1 Redox Potential Eh (mY) I YID I Turbidity (NTU) I 0 I Turbidity (NTU) I 0 I White Mesa Mill ~1)ata Worksheet for Groundwater 1 of2 capturx' W!.1PAT'DLE w'w",4 ..... rir-.UNCTIOHAL'TY . <, Ii Milt 'Groundwater Discharge Permit ) Date: 01/22/2010 Rev. 6 Groundwater MonItoring Quality A~s.UI'anc& Plan (OA!') Volume of Water Purged I 47 7'1 Pumpins Rate Calculation F10w Rate (0), in gpm S/60:::; I .. ~n . gallon(s) Time to evacuate two casing volumes (2V) T:::;2V/Q = I ~IS .04. I Number of casing volumes evacuated (if other than two) If well evacuated to dryness, number of gallons evacuated I ..... ~ __ -I Name of Certified Analytical Laboratory if Other Than Energy Lab{ I+VJ~L .15cf of"ocs Sample Taken Sample Vol (indicate Filtered Preservative Preservative Type of Sample if other than as Type Added y N specified below) Y N y VOCs rlJ,'>I:: . ~\ , "0 -" 3x40m) ~'.a. ,I ' .. ,,$~! :, 1;ICL ." .~ Nutrients .,~,. ,,,0 : 1 ()().ml '10 ., ~" H4s'04 .~ .. ;-, ~ , , ' Heavy Metals ". r;iI ,,,'" "" I':. 0 .. ~. 25.0 ml ,.' fiP .. ' , .GJ;~ HN03 .!OO· AIl.Other Non Radiologies "fi)" '" .1t~ .~.o: :: ,250 m1 "0 ; ' . ... :.In ';0 . . ' ". No Preserv. o· Gross Alpha ." ijI lI~S. li.lOOml ,81::': r:::r ~ flN03 fia ~.( , " ~ t_ .... .. Other (specify) ~ .' .-Satnple volume .'~ ~ , .,i'm -'0 , .. ' .. : :~r"': lJ ': _ r .. . . ' " " .. " .. ,-~ &en~ro.\ J:r\or~o.(\ll~ .fpreservative is used, specifY Type and Quantity of Preservahve . . >'j See instruction , ,y A((II}(d. 0(\ Sae ~t , O(V~ ~,,~'r o.nd Cro.rrlA Of\~;te \{~, -e~rqe(A~"" 'sA.Mf \;SJ -event. r VJ'j'-' .b.e~iA" ~1-0<1 IS" ft-\r~~y~Gl well th~\J ~ -tott;\1 of' 2~D l\1i()v..te.~ I.,.)",-~r ~C\.S de~r ~hro\).~ov..t p~~~.. ?v.\,\€-~nJc4 o.n6.. $t.\mpl~~. ~erc.. Gollcctea. A,+ ~.55 . Le.p\..S ,fc ~+ 1~7'! Pepth C1.~~rp\Ar<)~ waS gg.gb . N tJ ,'0 . .0 lit q 8fI ". '. White Mesa Mill ~~1)ata Worksheet for Groundwater 20f2 capturx· CC""~T"L( WIT_A.",·ri;r--FuNCTlONALrrV Mitr· Groundwater pjscharge Permit ) Oa~(!; 03/12/2010~, r. .%toundwaWr Monitoring Quality Assurance Plan (OAP) ') :; .. I AITACHI\IENT I , t O.NMI.SN0,:n S • _J ~ WHITE MESA URANIUM MILL Attachment 1 L<~;; See iqstructinn , . _ -.J FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Even1: I L.jT'h Q"'Cl.rhl" ' &t'O\,)..t\,).v.j(l...hr . ~DI.O Location (well name):I-' ---'-""'-=..:,:W:.:...\ooo-lIL.Wg:........-______ ---' Sampler Name and initials: I-rAMer Ho 1/; d~ ';} ITit Date and Time for Purgind I 1 !HU 2.,Qt 0 and Sampling (if different) Well Purging Equip Used:OOpump or@] bailer Well Pump (if other than Bennet) Sampling Event I S GlV) ~ (.?.nolll.a. \ Prevo Well Sampled in Sampling Event 1...1_f'A_'_W_-_l'f_, ___ -.I pH Buffer 7.0 J,O pH Buffer 4.0 Specific Conductance I 'I1{' I~MHOSfcm Well Dcptb(O.O 1ft): Depth to Water Before Purgin~ -r().'1D , " Casing Volume (V) Conductance (avg) L-..;;~:;,,;;;!l....:;3;;;..;J...~ _____ __..;.....I, I pH of Watet (avg) Well Water Temp. (avg) I 14 ,o~ Redox Potential (Eh)1 ~-r3 4" wen:, 4 i . ~3 . i(.653h) 3" Well: 0 (.367h) TUJbiditYLI_o":':'-~-l Weather Condo Ext" Amb. Temp. ·C (prior sampling event)(: OCc. I Time I If:?!) I Gal. Purged I g}.37 I Time 111:')1 I Gal. Purged I ~l .5j I Conductance I 3!>:X> I pHI G:.·ti~ I Conductance I ~~3~ I pHI {;-43: I Temp. "C I 19 .0:;;1.. I Temp. QC I 14.()3 I Redox Potential Eh (m V) I 'S75 I Redox Potential Eh (m V) I '375 I Turbidity (NTU) I () I Turbidity (NTU) I 0 '.J Time 11I~a: I Gal. Purged I 'f~I·~ I Time I lI33 ' . I Gal. Purged I ~.()~ I Conductance I ~?I I pH I 6.37 I Conductance I ~53~ ] pH I (;·37 I Temp.oC I I Y ·o:l.. I Temp.oC I ;4.o.:l. I Redox Potential Eh (mV) I ;},73 I Redox Potential Eh (mY) I lZ.:t I Turbidity (NTU) I . 0 I Turbidity (NTU) I ,0 I White Mesa Mill d.td1lata Worksheet for Groundwater ~ lof2 capturx' COM.I,T,BLl WITH,..,.4 • .,nr-fUNCT'ONIoUTY Mill ' Groundwater Discharge Permit Date: 03n2/2010 Rev 6 • 'Groundwater Monitoring Quality A~surance PIal! (ClAP) Volume of Water Purged I ~3.S~ gallon(s) Pumping Rate Calculation Flow Ratc (Q), in gpm. S/60 = I . ~1 Time to evacuate two casing volumes (2V) T = 2V/Q = I 3Ko ,gb I Number of casing volumes evacuated (if other than two) If well evacuated to dryness, number of gallons evacuated Name of Certified Analytical Laboratory if Other Than Energy Lab{ A\JAL I Sa ~\JC(.>· Sample Taken Sample Vol (indicate Filtered Prescrvutivc: Type of Sample irother than as y N specified below) y N Type VOCs . ,m -;'~ 3.x40ml .0, B '. RCt , , .. Nutrients ~.<:',,B J'" . , m. '.' 100 m1 CJ , ~"l . H2SO4, t . ;, Heavy Meta Is ' , GJ J .P ', 250mt ( ,m ,t. ~D HNOJ '" Preservative Adde{} y N ,~ .~, 0 l I!I' '0 ' . , J~' '"D All Other Non Radjologics ,~< f~,-O ' 250ml : 0 .' ~. NQ Pre.serv. D. .gJ ,,' . ., ~ . Gross Alpha . '~.' . , ' . .p r' 1.000 mt ~ ,0 HN03 m 0 Other (specify) " Sample volume ',' , , ~ .&1 ,Q &J G [jI .. " ., .'t., &e.nc.r""l ~o{"5"1'\\") If preservative is used, specify Type and Quantity of Preservative' ! ~ !'Comment .,.tf, See inSlruction Arr;\)cA, on >ik ~ O&OC\. -r:.,,,r.er \4a\l,Op1 0/\ ~;tc ~(' p""'.t\-e fM~ SaM.p);\j ~uc,,+, 1'V\rt\<" hc.~OJ) (:1..0\: 051£>. Pv.t'~t\. Well ~{" "\ +c.~a.I, of ot 38~ M:nlA.J-~~. \DJ-c:r ~.$ mo..si-I~ deCA.r t~ r<>~~OlJ..t f\),.r~(,. ?4r~ ~ ~l?deJ ~n4 .,S4"'plej r.vU( , Col/~d-ecl ",t 0 1j1-!O . L~t'+ '),J.sI·t~ ~l-JI.!>'1 , (A.f}cr pUeJe W£tS 7\. t.j 3 White Mesa Milt . :tr~H)ata Worksheet for Groundwater bW~ 2 of2 capturx' COMP4"U< WtlH,4.",,s,--FuNcrroN4uTv MHI -Groundwater Discharge Pormlt Date: 03/22/2010 Rev, 6 ... Gfoundwater Monitoring Quality ksurance Plan (OAPI I ATTACHMENT I IQENlsoN'l WHITE MESA URANIlIl\l MILL At1achment I _<7 See insltuction .. ~ MINES FIELD DATA WORKSHEET FOR GROUND WATER ~ , . . ... -, Description of Sampling Event: ! 41\ Q\J..().rh:.r v,rou.I1 v.wc.dif ~ID Location (well name): .... 1 __ 1I.\...:.;..W;;....-~luq _______ ~ Sampler Name andinilials: !-('o-nl\c, ..... }-IofljAA'zt/nt Date and Time for Purgind \l/l~/~Ie and Sampling (if different) Well Purging Equip Used: [!i]pump or@] baiter Well Pump (if other than Bennet) Sampling Event I Se.mIO\n(\\AQ,\ 6:W Prev. Well Sampled in Sampling Event 1'-__ ""_W_-_IA ___ _ pH Buffer 7.0 /.0 pH Buffer 4.0 Specific Conductance I : 'j<f l( I",MHOS/em Well Depth(O.Olft): I ItieL OC> Depth to Water Before Purging( 51,3\1 Casing Volume (V) 4" wen:1 b3 .1') . I (.653h) 3" Well: 0 (.367h) '----.;:.--" Conductance (avg) 1'151 pH of Water (avg) Well Water Temp. (avg) I 1'i . 41 Redox Potential (Eh)['10~ Turbidity .... 1 ~O __ --1 Weather Condo '. Ext'l Amb. Temp. O( (prior sampling event) I OOC I Time I 1~4.-r; I Gal. Purged I I;)O .. X> I Time I Jli y.b I GaL Purged I t3q·W I Conductance I It.t5b ,I pH" b .~q I Conductance I 1~51 I pH I b ·8~ I Temp. QC I IYAI I Temp.oC I f4HI . I Redox Potential Eh (mY) I ~O~ I Redox Potential Eh (mY) I '10lj . I Turbidity (NTU) I D I Turb~dity (NTIJ) I 'D I Time I 11.141 I Gal. Purged I I:~O .6:2 I Time I 11.!1.ofi5' I Gal. Purged I j3D.~.s I Conductance I Il{Sg I pHI &,8;1.. I Conductance I 1~51 I pHI 6.~ I Temp.oC I 11f ."iD I Temp. QC Ilq.4-1 .1 J Redox Potential Eh (mV) I . ~D.5 I Redox Potential Eh (mV) II.{07 I Turbidity (NTU) I " I Turbidity (NTU) I ·D I White Mesa Mill ~d~ata Worksheet for Groundwater !=~ 1 of2 capturx' cO ........ u WITH..--d."ri:o--FuNCTIO"AlITV ~ MVI. Groundwater Discharge Permit ,Groundwater Monitoring Quality Assurance Plan (QAP) ) Oa!e: 03/22/2010 Rev. 6 Volume of Water Purged I 1:31.)..'6 Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = I ' ~11 gallon{s) Time to evacuate two casing volumes (2V) T=2V/Q= I 5~7. 'I'" I Number of casing volumes evacuated (if other than two) If well evacuated to dryness, number of gallons evacuated Name of Certified Analytical Laboratory ifOtber Than Energy Lab! AWl'lL. 1 set (I.f' '-'CC6 Sample Taken Sample Vol (indicate Filtered Preservative Preservative Type of Sample if other than as Type Added ~ ! , ~ ~ VOCs N\lLriel1ts Heavy Metals AU Other Non Radiologies Gross Alpha Other (specify) (,.eI\UI1\\ ~or~t\it.~ y ~. ~. .fi'L. m ijI .. ' 5i N specified below) .. 0 3x40,inl . " ,'Er ,100ml 0 " . ~~o.ml 0 ' . 250ml. 0 . 1,OOOml tJ Sample volwne Y N Y ,.0 , .f$I ReL .' TB 0 . ,~' H2SO4 IlL til . 0 HNOS ~ 0 ~. Nb P.reserv. 0 , Il1 D HN03 iii . : "0 iii 0 If preservative is w;cd, specify Type and Quantity of Preservati .... e: iCommcnt :..J See instruction Arri'.!u\. 07\ Site.. c;..t O~3q.1'~nJ1Gr ).JolI.af.\~ 0" .s;t~ ':Jor·pw-~~ em(;\., S"Mfl ;~ '!:\}en~. PlAr~~ b~o.." (4+ 01145. l'",r,\ca. ~Gll f~t ~ +0\"( of ~05 Ml"IA+~~. weJ('I' ~li.~ tv1os\-lO cI-t~.,.. }},('ov.~~.ovJ fur~c. .. Pu.r~~{ ~rlJ.eJ 'iJ1~ SC\Mfk.> wer-c.. cot( ei\-ctl lA.1-I\{!;(). Ll:\-T .s,.~<.. ~·f 1.50 1, Depth tA.tt~(" pv.r~e.. w~ .59.71 White Me$a Mill N P.' 0 ' ,0 Ii '0 ~ ~di)ata Worksheet for Groundwater I&~ 2 of 2 capturx' CD",PATlB" WITIf~ .. n:--FU"CfION4LITY Mill . GrkndwOIter Discharge Permit Date; 03/22/2010 Rev. 6 ~rPundwater Monitoring Quality Assurance Plan (OAP) ATTACHMENT 1 :OENISO,.!)~.A ; WHITE MESA URANIUM MILL Attachment 1 (1' See instruclioo ,",d MINES : FIELD DATA WORKSHEET FOR GROUND WATER ... ...:...._.tr .~_~ ...... Description of Sampling Event: I Lj1"'h 'Q~« 6-r~l)..:ter "~IO Location (well name):IL....-.t.-M.;,,;;w.,;......--..::::;;"O~ _______ ----J Sampler Name and initials: 1-('NV'v HoIt,~~7tH Dale and Time for Purgin~ H/i"I@\b ' and Sampling (if different) I lIIZJj;toJD Well Purging Equip Used:OOpump o@ bailer Well Pump (if other than Bennet) ..... 1_·Q~'~...;;;n~ ___ ,~1 Sampling Event SeM I t\Mv.o..\ trW pH Buffer 7.0 7.0 Specific Conductancel .... __ 'i ...... S-+1 ____ IIlMHOSi em Depth to Water Before Purgin~ ~~.i 5 ' Conductance (avg) Prey. Well Sampled in Sampling Event L..I_/'A_W_'-_'~ ___ ·_·_--l pH Buffer 4.0 Y.O Well Depth(O .OI ft): Casing Volume (V) pH of Water (avg) 4" wen :1 ~.77 j(.653h) 3" Well: ..... ~t>.::....-_-'J(.367h) 7.~ Well Water Temp. (avg) I 'f:;' .1'1 Redox Potential (£11)1-1 ....:,l.\-'-I'\"--_ ... TurbidilYL..1 _'.2..;.,'~~_---' Weather Condo Ext'l Amb. Temp. ·C (prior sampling event) I lD~ Time I tQ~ I Gal. Purged I .. 6 0;.-I Time I~ I Gal. Purged I '1.'19 I ,~a.o 13'" I , I pH 1 ·7.~G. I Conductance ~761 Conductance I t7f:.D -I pH I 7 .~ I Temp.oC I IS,IS ! Temp.oC r I s.~ 13 I Redox Potential Eh (mV) I ~l~' I Redox Potential Eh (mV) I \;I~ I Turbidity (NTU) L~q:1 I Turbidity (NTU) I JD.l I Time r KIW. I Gal. Purged I ~& I l1,~ Time I ~ I Gal. Purged I s :3.7 I l~ Conductance I ~lCob I pH [ 7 ·¢-.:S I Conductance I b7{,5 I pHI 7 .02.5 I Temp_ °C I l li'~'i ! Temp.oC I i O. Itt I Redox Potential Eh (m V) I 91q I Redox Potential Eh (mY) I 4'1~ I Turbidity (NTU) I ~.'\ I Turbidity (NTU) I ~.b I while Mesa Mill ~di)ata Worksheet for Groundwater f!r~ 10f2 capturx' co"rATl8U WIT .. ",.d . .,n:--F\'NCT'OHAUH Mill -G;oondwater Discharge Permit \ j ) Dat~: 03/22/2010 Rev_ 5 §(-6undwater MonitorlngQ.uality A~\urante Plan (CAP) Volume ofWaler Purged Is. 7" gallon(s) Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = I . i9a Time to evacuate two casing volumes (2V) T= 2V/Q= I ~,'fD I Number of casing volumes evacuated (if other than two) If well evacuated to dryness, number of gallons evacuated I I S./t:. Name of Certified Analytical Laboratory if Other Than Energy Labt A\Ji\ll sJ ~ VOG.s Sample Taken SampJe Vol (indicate Filtered Preservative Type of Sample if other than as Type y N specified below) Y N VOCs ... SJ ,,:~ --"'-0 ' \.ol . 3x40 mJ -0 GI .:. HCL PresclVative Added Y N '.r" -p , NutrientS 'ijJ-t:J~ iOO inI :a .~ <': tBlA mS04 .' Il '~I ,O-" . Heavy Metals . .,'~' -'0 , .. -.;. 259ml .f<' J~l ".:. D.:, 0003 i.~" (0' AU Other Non Radiologies '5)" , .(] 2'SQrol P , , ;,.lE.J I No pr.cserv. I:l .. I II ' _ ',. ' , .' Gross Alpha til' J:;J 1;000 mL ~~ '·I·~,~q i " HN03 "IKJ' , .~ ... . Other (speci fy) -'. tJ ' Sample volume ti '!fB J .... , 'Q]' tI 1 ,,' ,. , II. &eI\et'C).\ ~or~o.t"L~ IfprcseIV8tjve is used, specifY Type lind Qualltity of Preserv3 rive ~ fi ~Connnenl ;;.;# See instruction ~rr~I1C=~ Ott !>j1~ ~+ llSD. -r",nno:( H(.1I:~,)6 c,n~ G-A.rr;/\ ~1>..~J1I~( on ~I+~ +Cr piA .. ~e Ma ~o.lI'\ph~\ ~,,~,,\ ,PV.(~C. b~~D.""~ 1~5. Pv..('j~{~ ti)c:1I ,fc.,. 3() M,f'\u..~~. , ... \o~ k~e ~I~~~~ o.r'\ol il 1Ne:11 Ran-tAr'~. \.)o..t.:r ~o..:. MO~\~ Cle:o..r·, l.e~ -,t~·o..+ 1330, Arr1vt:!. 0(\ sA~ ()J 1~3, ""'M('(" IA.()~ (j()..('f'l) P"'e.jc.'I\~.\;;t" . .s"'Mp\~~ ~\lC(\+' ~o\.( t>eF~ +0 lJ:)G\,;tGr }53. SI $o\Mple~ I.)€.r<. hkc ... ~t ll'fE). L.e.\t ~ I ~( 1509. . '. . White Mesa Mill .0 , . ~:--. .,D - if ,. ..JL...d'Oata WQrksheet for Groundwater 11'r~::1 ~~ 20f2 capturx COMP.na .. WITH,.,4 • .,n,--ruNcTIONALIlY ~ill . Groundwater Discharge Permit Date: 03/22/2010 R!IV. r. < Groundwater Moriitorme: Quality Assurall(e PliO (OAP) ) ATTACHME~T 1 WHITE l\!ESA URANIUM MILL FIELD DATA WORKSHEET FOR GROUND WATER Description or Sampling Event: I y~! Q'\AAC4(; 6roU{1JINo..fer ='-010 Attachment I W See i~truction Location (well nnmeH .... ...-I'-~ .... W .... · _-..;:,~.....;. ~ __ '""-____ -' Sampler Name and initials: l-r~ntl<r Hf>I,.'J~4/.,..t+ Date and Time for Purging .11-1 b" dlbi C . and Sampling (if different) Well Purging Equip Used: OOpump o@ bailer Well Pump (if other tban Bennet) I Q~5 .· I Sampling Event I ?eM'\ At111 \AOJ iT-v,) Prevo Well Sampled in Sampling Event .... 1_('11_. W_ .. -_Lf_: ......... _____ _ pH Buffer 1.0 1 :0 pH Buffer 4.0 '11 .• 0 . Specific Conductance/ 1'\'\ j . I ~MHOSJ em Well Depth(O.O] ft): Depth to Water Before Purgin~ .. 6/ .. 10 . Casing Volume (V) Conductance (avg) Well Water Temp. (avg) I Itt .];0 5 Redox Potential (Eh)1 Turbidity I 3.6 Weather Condo Ext'l Amb. Temp. °C (prior sampling event) I 3\)(. J Time Iljb~() I Gal. Purged I' ~-.7b I Time L ·i?.~l I Gal. Purg.ed I ~O. ~ 1 I Conductance I "'l1>g I pHI :S.b7 I Conductance I btJ.;lJ I pH I S,cb • ! I Temp. "c I \-1 .Ij<\ I Temp.oC I l"ls~ ·1 Redox Potential Eh (01 V) I l44~ -I Redox Potential Eh (m V) I 4~f( I Turbidity (NTU) I ->, b · . I Turbidity (NTU) L '?:..7 . -I Time I:t¢.~;l. . I Gal. Purged I bl.)~ I Time Il.i~3 I Gal. Purged I bL 4.1 : ·1 Conductance I bjQ~ I pHI S.'=-? I Conductance I ~~~~ I pHI !i .~ I I • Temp. "'C I l'tot .·51 I Temp.oC I "'i -SO 1 Redox Potential Eh (m V) I I Ylf~ I Redox Potential Eh (n'lV) I' 44 K I Turbidity (NTU) I 3.b 1 Turbidity (NTU) I ~ .. 6 I White Mesa Mill -L..ltOata Worksheet for Groundwater ~ lof2 capturx' COM~4rlll[ WlfHA--P,r-'UOICflOHAlITY • Mill • Groundwater Discharge Permit Date: 03/22/2010 Rell. 6 ~ Groundwater Monitoring Quality Assurance Plan (ClAP) Volume of Water Purged I 61. gLj galton(s) Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = f : Dt\1 Time to evacuate two casing volumes (2V) T=2V/Q= I ~?-.~ I Number of casing volumes evacuated (if other than two) Ifwell evacuated to dryness, number of gallons evacuated Name ofCectified Analytical Laboratory jfOther Than Energy LnblAWAL I ~c~ o£vDG.S . I Sample Taken Sample Vol (indicate Filtered Preservative Preservative Type of Sample if other than as Type Added y N specified below) y N y VOCs ijJ. .. ' O · -of · 3~40ml '·0 iI HCL . til Nutrients .~. '0 t' 100 inL CI (2.' mS04 OJ Heavy Metals .' .Ill 0 250,00 IiI I .0 ,~O3 '00. All Other Non Radiologies 61·' ',0..". i50ml P-0, l1f NoPreserv, ,0 Gross Alpha " BI: 4::1,·, , l,O(}O ml III 0 RN03 m Other (specify) rj . q -Sample volume 0 riI 0 .. &~l.('o\'\ '::f\O~fAt'I;Cl Ifpreservative is used, specify Type and Quantity of Preservative: ~ ! ~ 1: :Comment .'i See instruction ~KY Arr'\JcA. or, S:tc. 6.'\ ,071.\\-,.I"'MI\U H()tI:A40 ~(\~ 6-o.rr\f\ Pc>-\mer pr~sen-t tc" P\AJ" ... <\'I!. ~n~ :)(l.M.p'\YI~ cv~~t. H"~'G(. b~~~ to.+ eiSO, f~r~eJ 4>eJl for ~ +o~\ of ~~ A\1(\\'\'+e~, iJJ",-1er ~ M~tl~ Gleo.,. ih(,o~1o\J.l pw,'\c . fVJ"~('" ~"c\e.cX. Mel.. ~MplG> ~cr~ Gonechc:~ q.'f I~b. Le{\ bl~C G\.t ,;z.'ttb . Dep1"h ~~te.r S<krt\~(. wo-.S qtgD White Mesa Mill N 0 '0 0 r;s 0 a ~d··Data Worksheet for Groundwater li':'':':1 ~~ 2of2 capturx' tOIAPAT'H< WIfHA.,,·zt,-rIlHu'CHALITY Mill '"Groundwater Discharge Permit ) Date: 03/22/2010 Rev. 6 ;, Groundwater Monitoring Quality Assurance Plan (OAP) ) . I ATTACHMENT I ; OENISO.!) ~l WHITE MESA URANICl\I MILL Attachment 1 I " .' . ;. f}' See llIslruchon INtS . FIELD DATA WORKSHEET FOR GROUND WATER -~-Description of Sampling Event: I L:\n. QVA'-.}~t" G-ro-...t\J. Wo....h:.r Location (well name):Io.-..;.J'I.\-,--w,---. ~~3~ _______ -.J Sampler Name and initials: I -Cnt'\~("' Ho 11 :J.G\ <JI-ri-\ Date and Time for Purgin~ J 1/1; /g.DIO Well Purging Equip Used: [QJpump o@ bailer Sampling Event S e.m i 0..(\0\/\<4' (;. \J pH Buffer 7.0 , ,.0 Specific Conductancel-I _....:q~'f-'l1'-. _-",IIlMHOSI em Depth to Water Before Purgin~ '·11 L.{ • O~ , Conductance (avg) \....-_.:;;;..~_q....!Lj..:..( ____ --' and Sampling (if different) 11/ Xl.! :2.010 Well Pump (if other than Bennet) I Qeo Prevo Well Sampled in Sampling Event I j'J. OW -. )7 pH Buffer 4.0 Well Dcpth(O.O] ft): Casing Volume (V) 4" well:l \1.7 J 3" Well :, 0 pH of Water (avg) 1<·653h) (.367h) Well Water Temp. Cavg) Jt{,03 Redox Potential (E1l)/ 1I3.5 TurbiditYL-1 ~1._I _-----' W cather Condo Ext'l Amb. Temp. °C {prior sampling event} I 6 5(, I Time I A60 I Gal. Purged I al7D I Time I~ 'II I GaL Purged I ~l .qJ · I 1l.5.S i15'" Conductance I ·~~Li?.. I pH I b stt I Conductance I ~lf'l' I pH I (; ·5.3 I Temp. "C I )';,·g8 I Temp.oC I j4 ;o.l. I Redox Potential Eh (mV) I ~3~ I Redox Potential Eh (mV) I ll:3S I Turbidity (NTU) l ' . J.£l I Turbidity (NTU) l J.I J Time I~' I Gal. Purged I @ . i~ I Time I ~· I Gal. Purged I ~:.>S I \\51 ~9~b I Conductance I pH I G,..~!{ I 1158 Conductance I ~'I~i I pH I b-q-q 1 Temp.oC I ,~.~i I Temp. DC I 14,0.5 I Redox Potentia! Eh (mV) / ::li5 I Redox Potential Eh (m V) I 'i.35 I Turbidity (NTU) I .7 I Turbidity (NTU) I :1 I White Me$aMili ~d'Oata Work5heet for Groundwater ~ 1012 capturx' 'OMPIlTIBLE WIT"A-",n:.--FUNCTlOH.1I,. MUI 'Groundwater Discharge Permit ,Groundwater Monitoring Quality Assurance Plan (OAf'J ) Date: 03/22/1.010 Rev. 6 Volume ofWnterPurged I ;p..,ij$ gallon(s) Pumping Rate Calculation Flow Rate (Q). in i'm. S;60= I ' ;11 Time to evacuate two casing volumes (2V) T ;; 2V IQ = I 1 07. ~ 7 I Number of casing volumes evacuated (if other than two) If weU evacuated to dryness, number of gallons evacuated Name of Certified Analytical Laboratory if Othct Titan Energy Lab~ A \J Ii L l.sd ofvo C ~ J Type of Sample VOCs Nutrients Heavy Metals All Other Non Radiologies Gross Alpha Other (specify) &Gr.Cf"'\ [ lComment White Mesa Mill :Lnor~o.n;c.~ ~~d-oata Worksheet for Groundwater ~ Sample Taken Sample Vol (indicate if other than as y N specified below) " , f1J .. J, .. C ... · 3.x40niI T. "~ ·.!I:P 100ml J~r '. m , '250.tnl ijl}' , '.0 ' 250ml ,Ill ::0 " J..,OOqml .. ;-Sampie volwne ' . :b rn ; ", , Filtered Preservative Preservative Added Y :r;J a 5J ;'-. ·01 .·' '.fir G N Type Y N , m :HCL 'rs2 [J ~'. H2SO4 ~. 'Q ,lP: HN03 'Ell '0 . ,;;~), NoPreserv. 'po ~ [J 'RN03 ,ra --Q "aI' 0 9I .. If preservative js u<;ed, specify Type and Quantity of Preservative: .<J See instruction 2 of2 capturx' CO"PATIBLE WITH,A,~·n.--FUNCTlO~AlITV .J Mill· 'Groundwater Discharge Permit Date; 03/2'1/2010 Re~. 6 G(oundwater Monitoring Quality Assurance Plan (O,AP) 'OENI$OJ)~j ; ATTACHMENT 1 WHITE MESA URANIUM MILL AUacnmenl I ':-"t See inslructiou MINES . FIELD DATA WORKSHEET FOR GROUND WATER . ~.---D~criptionofSampl~gEvem: ~I ~Y_:~~Q~u~~~1~~r~6~r~_~~d_~_a_t_cr~_~~O~IO~~~~~~~~~~~~~ Location (well name):I-1 ~;v._vJ_-_~-,~_~~_~_~--, Sampler Name and inilials: 1 ~I')(w' )~GiI;Jq.~/Ttt Date and Time for Purgingj '111 b b..olo Well Purging Equip Used:IT!Jpump o~ 0--1 bailer Sampling Event SeMI ~1W\1,A"'\ (,-\,0.) pH BlIff~r 7.0 Specific Conductancel ---q~1 -h.1MHOS/cm Depth to Water Before purgindl/:\';,,\!) -I Conductance (avg) and Sampling (if different) 111 /1(/,'2.<=>10 Well Pump (if other than Bennet) .... 1 ~Q:::l.-.e_D....;:,..",, ____ ~ I MW-~O Prevo Well Sampled in Sampling Event I.._~ ____ -'---.I pH Buffer 4.0 1 '4.0 Well Depth(O.Olft): 1 f~.Co Casing Volume (V) pH of Water (avg) 4" well:, ~.b~ 3" Well:. D 1(·653~) (.367h) Well Water Temp. (avg) I '5. '3 Redox Potential (Eh)L.,1 -,~.:;..~_7_--, Turbidity I I. ~- Weather Condo Ext') Amb. Temp. DC (prior sampling event) I , (I"G Time I \LlX5 I Gal. Purged ! '3 ,~'i I Time I 'I:f~b I Gal. Purged I Lf.1l3 I Conductance I ':1&0'2> I pH I b lX' I Conductance I ~~ua I pH I f,;Jq . I Temp, DC I I~~. I Temp.oC I n;;b8 I Redox Potential Eh (m V) I j3~ I Redox Potential Eh (mV) I '~~1 I Turbidity (NTU) I" \.;' I Turbidity (NTU) I l.~ ] Time I \Qd,1 I Ga 1. Purged I ~.).J.. ·1 Time I 1 '12'8' I Gal. Purged I '1.00 I Conductance I ~-S~~ I pHI (;./6. I Conductance I ~:l:5~O I pHI ·G.JO I Temp. DC I ·15.e.'l I Temp. DC " Js·7~ I Redox Potential Eh (m V) 1 ~37 I Redox Potential Eh (m V) I ~:1Z I Turbidity (NTU) I \.J... I Turbidity (NTlJ) I 1.~ I White.Mesa Mill t~>Data Worksheet for Groundwater 1012 capturx-(O"'AT'Bil WI rH~'t>n:--flJNC"D ... L'TV * ~ ~ Mill;'Groundwater Discharge Permit Groundwater Monitoring Quality Assut"dnce Plan (OAP) ) ) Volume of Water Purged I b· 7~ gallon(s) Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = I . lq~ Time to evacuate two casing volumes (2V) T=z2V/Q= I 37.75 I Number of casing volumes evacuated (if other than two) Ifwell evacuated to dryness, number of gallons evacuated Name of Certified Analytical Laboratory ifOlher Than Energy Lab~ A'WAL. 1 !)d:\)t~o(..s Sample Taken Sample Vol (indicate Filtered Preservative Type of Sample if other than as y N specified below) Y N Type VOCs ~,~-t. q , . . Jx40ml D · " Ell: l:IeL Nutrients ".~ :" .~) T IO,O'rnl 0 JiI ' . H2SO4 Heavy Metals ~' " .0 :,. ,Z$O ,m.1 :f$l . ' ,,0 HN03 AU Other Non Radiologies (ii-~::O 25,9 mi . .0 .-"Ji). NQ 'Pr¢serv. <l . . Gross Alpha '$ r '.0 ". -1000mJ ~ 0S1 .. -'[;1', "RNO] " t .... Other (specify) 1_, • Sample volume Gl,' d ' tI . IE " . ;.J ; < -, Date: 03/22/2010 Rev, 6 Preservative Added Y N 15!1,,/ ' D- ~ , . .0 :/.I!I 13 D. ' 12!, 18: ·'0 0 : .fi1 . , " . (,.eJ\ero, I -:I:n!> r ~(\ ~ c.~ Jf preservlllive js used. specifY Type and Quantity of Preservative: ! ;;Conunent ~ See instruction /7 Atr ,,J<:~ .on ~.tc: o..t I~OC, "T""IIc.r HD\I~~ .. O M~ ~fr ;" ?ct1lWltf ?re~cl1~ f~(' p"'t<jE! C<I1J ~"""'f l.';:j N e,l. ?u.< ~c b<;~ c.~ .. + I ~ ():'). P u.rjd !.l d t ~r 35 M.~ "'t~ ~ . !Nell 1(0..1'\ Dr~ ~ L.ett sAt. ~t lY45 , w«! ~r I,\)ct~ M~s~1~ (J~,... A,.r:·,,~ Of' ~;+~ ~t o~~'\ ' --r::i\n(./" ~i/'t>.. &~(r~fI pre:.e.t\t -h. 5~1V\~\e Wc.11 lOO\{ lJepfh To W<:I.ter ~A.Mf"~~ were:. h.\I\Gtl oJ o<gt.\ 5 Le~~ Ii it c. o...t O~S~ . 111.\.71 . White Mesa Mill ~ld'Datil Worksheet for Groundwater lh~ 20f2 capturx COMP4'l8l[ wITHA,""n:r--'~HCTlO"ALlTV .. . ! ; Mill • Groundwater Oiscilargt! Permit Date: 03/22/2010 Rev f> G~OIJndwater Monitoring Quality Assurance Plan (QAP) OENISOJl ~1 ATTACHMENT 1 WHITE MESA URANIUM MILL Attachment L ; ,_ ,:-1 Sec instruction FIELD DATA WORKSHEET FOR GROUND WATER • MINES . . --Description of Sampling Event: 1L--'~-,-'_h--",Q,,-,u.4=, ;.;...(_k_r'_&_r..;;.""""~J,-,~=--·t_~r_9.0::;....;;..:,;..;:;jO ____________ -,,, Sampler Name Location (well name):,-I _M_·W~-...;;;;l.;..::S=:... _______ ""'.1 and initials: ,-1·t:..;..~,_",._tJ'--:..;H~~;_(:a_'.-4i-a/--....:'T;..;:.." ..... Ji.:.... __ ..... Date and Time for Purgind ) 1-1(,) ~ a.ctO and Sampling (if different) .... 1 .:.::.M;..:,0~,, _____ -.I Well Purging Equip Used:! E;l .lpump o@ bailer Well Pump (if otber than Bennet) ..... 1 ..;;Q;:..;e=o;........ __ ---' Prevo Well Sampled in Sampling Event 1 .... _M_w_. _3_a_, ___ ---a pH Buffer 7.0 ..... ~ _....;1_.0~_-" pH Buffer 4.0 Specific Conductance .... 1 _'\..L.I\.:..q-'--_---', ~MHOSI cm Well Depth(O.Olft): ..... t _1l_5 __ --" Depth to Water Before Purgin~ 7=1 .,gfl . Casing Volume (V) 4" well:I' ~'~!)'.3 1(.653h) 3" Well: ,0 (.367b) 1--"':;'_-.1 Conductance (avg) pH of Water (avg) Well Water Temp. (avg) lit{. ~'1Ab , Redox Potential (Eh)1 L\::lq Turbidityll. ~ 75. Weather Cond. Ext" Amb. Temp. °C (prior sampling event) I 50 (, I Time 111..l5 I Gal. Purged I 5b.'"\a. I Time I t~I" I Gal. Purged ISE>.'-3 . I Conductance I ,?>~Sb. .1 pHI G.,~:; I Conductance 1 325E I pH I f:>,37 I Temp.oC ( lLi<3~ I Temp.oC I 1'i .3~ I Redox Potential Eh (mV) I ~30 I Redox Potential Eh (m V) I 4J.4 I Turbidity (NTU) I ;,',{ I Turbidity (NTU) I .• 7 I - Time I i?J7 I Gal. Purged I' 5b.'<tJ> I Time 11i,g I Gal. Purged I S1·C1 I Conductance I ~~ I pHI <0 ·37 I Conductance I :n5~ I pHI (,.36 I Temp.oC I \~. '5" I Temp. "C I 19·35 I Redox Potential Eh (mV) I ~hq I Redox Potential Eh (m V) I 4',)$ I Turbidity (NTU) I .1 I Turbidity (NTU) I .1 I , White Mesa Mill .~d.o[)ata Worksheet for Groundwater !ft~ 1012 capturx' CO"'AlIU, WITH,.4-.""ri:>--FUIjCTION.<ll7Y Milt -.,G;:Qundwater Discharge Permit Gr~ndwater Monitoring Quality Assurance Plan (OAP) • Volume of Water Purged I 57,50; Pumpjng Rate Calculation Flow Rate (0). in gpm. S/60 = I ~ ~i 7 Date: 03/22/2010 Re~. 6 gallon(s) Time to evacuate two casing volumes (2V) T=2V/Q= I ;i:4L~~ I Number of casing volumes evacuated (if other than two) If well evacuated to dryness, number of gallons evacuated Name of Certified Analytical Laboratory if Other Than Energy LabiAWAl } se.! 1;"0':5 Type of Sample Satnp le Taken y N VOCs fSil, 0 Nutrients " ,D ' Heavy Metals ~ . P . An Other Non Radiologies ~' 0 Gross Alpha ~ 0, Other (specifY) , G;J 0 &~"c.(<\t ):'nor,1o.tl I O 'Comment ,1 White Mesa Mill ~d'Oala Worksheet for Groundwater I!. .. ~ Sample Vol (indicate Filtered Preservative Preservative if otl)er than as Added specified below) y 3x40m~ '0 ; 100ml .0 2S0ml , . _, "fiJ. 250rnil Jk~.~ 1.OOOml t'jl, , Sample volume CJ N Type y N ,~ HCL ... ~. . ~ [J <01. H2SO4 .,~-0 P HN03 .at ,P OJ.. No Prescrv, . 0 ~ -0 ,-HN03 ~ lEI ~ q ~ j' , rrpreservativc is used. specify Type and Quantity of PTcservali"'e' ti See instruction 2 of 2 capturx' CO" • .a.T,U£ WITH~ ... ,,'n.---ruHCT'O"'LITl' o a ; . i . Mil!-Groundwater Oiscl1arge Permit Groundwater Monitoring Quality Assurance Plan (OAPI ) Date.: 03/22/2010 Rev, 6 ATTACHMENT 1 Attachment 1 . OENISO,}) WHITE MESA URANIUM MILL : .. 1f.: See UlStructwn .. I ~I~~ _., FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: III t~ O:vP .. r t ~r-GjO!J1\d.wAt(cl" ;l.Q \Q Sampler Name Location (well name):/ MW -;)6 and initials: I Geccl"'e"'."", ... / 6..., Date and Time for Purgin~ t) 1.5! i D i 0 and Sampling (if different) I L-.:..iNI::/"":Aul...-. ____ -.J Well Purging Equip Used:OOpump o{Q] bailer WelJ Pump Of other than Bennet) ICkv-.'t ',..s.~~ Sampling Event I 5 e...MjPltt'\r\1U4.) Ow Prevo Well Sampled in Sampling Event I ("\ I.v' -?:z pH Buffer 7.0 I 7. 0 .. pH Buffer 4.0 £1.0 Specific Conductan<:e .... 19..&...&9-""4~_-..;IJ~MHOSI em WcIlDcpth(O.OUt): IJ.l1.33 Depth to Water Before Purgin~ 8 ~:L '3-6 ] Casing Volume (V) 4" WCJl:~ ___ -fI(.653h) 3" WeJJ:. '. (.367h) Conductance (avg) pH of Water (avg) rr ..... -___ -' Well Water Temp. (avg) Redox Potential (Eh) I ! 3 7 TurbiditY~I_!5!iiiiii _____ --l Ext'l Amb. Temp. "C (prior sampling event) I 'i"c Time I ';1.16 I Gal. Purged I I Time I niA_~ Gal. Purged L-I __ -I Conductance 13,2 ;).b I pH I 6.&.lq I Temp.oC I iy.!f7 I Redox Potential Eh (mV) I HI7 I Turbidity (NTU) I ~ 3-J Turbidity (NTU) Time I I Gal. Purged I I Time Gal. Purged 11...-. __ ......1 Conductance r I pH I _ I Conductance pH GI Biiii::J Temp.oC I Temp,oC Redox Potential Eh (mV) I -I Redox Potential Eh (mV) '-""----_ ..... Turbidity (NTU) I ~ I Turbidity (NTU) I .. White Me~a Mill ~d'Data Worhheet for Groundwa ter ~.de 1 of2 capturx' CD"~ATI.l. wrr"...--d • .,-/ir-fUf<CTlOrULITY Mill: Groundwater Discharge Permit Date: 03/22/2010 Rev, 6 Groundwater Monitoring Quality Assurance Plan (OAP) Volume ofWaler Purged .<-1 _____ -1 gallon(s) Pumping Rate Calculation Flow Rate (Q), in gpm, S/60 =1 L-___ ----I Time to evacuate two casing volumes (2V) T=2V/Q= 1 1 Number of casing volumes evacuated (if other than two) IfweH evacuated to dryness, number of gallons evacuated Name of Certified Analytical Laboratory if Other Than Energy Labf! -Sr:r Vt1f, AWA-L I Sample Taken Sample Vol (indicate Filtered Preservative Prescrvati ve Type of Sample if other than as Added y N specified below) y N Type Y N VOCs 18 0 Jx40ml ;,0 :18' HCL Ja .~. .. ',' 0 Nutrients liJ '0 100 nil 0 \21. H2SO4 • "0 Heavy Metals ~. ,0 250ml ri[ 0 HNQ3 • :0 All Other Non Radiologies ,S , , '~O 250m) '0 iii f No Preserv. 0 il ,. Gross Alpha fi4' 0 1.OOOm~ fiI '0 HN03 Jiij~ D- o '" Other (spedfy) fS 0 . Sample volume 0 fi1 0 )t. c;,~t\t."41 ,J: .... CIt' ~A.A. \~ S Ifpreservative is used, specify Type and Quantity of Preser ... a live: ~ ~ 'i See instruction lConunent 'Af"6vtAft "&1"... $.+t.. ~+ "40. 6.\.t'~.~ i'.t.\Me.1"" ~,..c;,.5c:. ...... ~ f~ ~"""fh~ -c..v~ .... ",:t-.. f'A.r,.. ..... '.\oc.,.,.,s. \-"..,);.c."" t>-.+ 1'3.56 .. S~,-'Iof'£I.s """,,,,'~r' G.ul"G.i'~~ .,.. .... 1'30~. W~+t..,... 'loVe.., c.le-5\. .... +~t-(fv;. .... 'v~ ~t .. .-Pl;"'~ e.vt-A.t. '-'~.\?+ S'~c. "'. r3~S. White Mesa Mill ~cI{)ata Worksheet for Groundwatel • .I~ 2 at 2 capturx' COMPATIBLE W/1H4"'I"f'l:;:--fUHCTtClN"1I1Y Mill-Groundwater Discharge permit Date: 03/22/2010 Rev. 6 .',iroundwater Monit~ing QuaUty Assurance Plan (ClAP) ATTACHMENT 1 OENISO,!l ~ WHITE MESA URANlUl\Il'dILL Attachment 1 '~p See illSlnlCtion M'NES FIELD DATA WORKSHEET FOR GROUND WATER -----.;,~ ~ --"- Description of Sam piing Event: [ 4Th () w\.r:h;.r VCt',,¥> ,L.oC1 ref M ,0 Location (well namc):L[ -lJjQ~~~~:""'-_-1.f~"':::!.vJ~¢;:L7 __ .-J j\\W~~7 Sampler Name and initials: r 4\ODU ~bll;Jet Y Date and Time for Purgind )1/1.17MI£) , and Sampling (if different) Well Purging Equip Used: [!!]pump o@ bailer Well Pump (if other than Bennet) Prevo Well Sampled in Sampling Event I L. ....;.M_~V_.s __ .. ____ -' pH Buffer 7.0 7.0 pH Buffer 4.0 Specific Conductance 1-' _---'9u'~1...----f1 !J.MHOS1 em Well Oepth(O.Olft): I • 9.;" .. 00 J 'i5.00 Depth to Water Before Purgin~ 5 1 .. 6.., Casing Volume (V) 4" well:\ ~ t(.653h) :J.~.Sb 3" Wen:"---.JII<>'----~_ (.367h) Conductance (avg) pH of Water (avg) Well Water Temp. (avg) I Pi. bl Redox Potential (Eh)1 4:t7 TurbiditylL.. ~()~_-.i W cather Condo Ext'J Amb. Temp. ·C (prior sampling eventl!3 ~c. Time I ];4\5 I Gal. Purged I 5.7 .~() I Time I \?..\l; I Gal. Purged I S17;)" I Conductance I \ 5'=-'1 I pH t (:,.'10 I Conductance IIS6b-I pH I b-'1O , Temp. <>C I 19.~ :] Temp.oC I l'i.b~ I Redox p'otential Eh (mV) I q~7 I Redox Potential Eh (mV) I 4.J.7 I Turbidity (NTU) I 0 I Turbidity (NTU) I 0 J Time I \¢=.11 I Gal. Purged I $1. 93 I Time I l;l.}& I Gal. Purged I 5~.1.5 I Conductance I j~~ ) pH I IQ.~CJ I Conductance [~6~ , pHI §.ri I Temp.oC I )4 bE» I Temp. <)C I/q.~ I Redox Potential Eh (mV) I ~~1 I Redox Potential Eh (mV) I Y~7 I Turbidity (NTU) I 0 I Turbidity (NTU) I D I WhIte Mesa Mill ~d'Oati! Work$heet fOI Groundwater ~ 10f2 capturx COMHTloa WlT~.-4."'h--FU .. c.r,o"Aln. Mill-Groundwater Discharge Permit Date: 03/22/2010 Rev, 6 };roundwater Monitoring Quality Assurance Plan (Q,AP) Volume of Water Purged I .s ~ .5<\ Pumping Rate Calculation Flow Rate (Q), i~~pm, S/60= I .~17 ] gallon(s) Number of casing volumes evacuated (if other than two) Ifwell evacuated to dryness, number of gallons evacuated Name of Certified Analytical Laboratory if Other Than Energy Lab~ A\JA l \ .sc.~ or; \)0(,,'; Sample Taken Sample Vol (indicate Filtered PI eservati ve Preservative Type of Sample if other than as Added y N specified below) y N Type y VOCs ~ 0 3x4Q tn1 0 III HCL "rjJ Nutrients . ~ 0 lOOml O. '129 H2SO4 l)I HeayY Metals ijJ q 250ml ,,~ [J HNO:3 III All Other Non Radiologies Il 0 250mi 0 ra N'o Preserv. er Gross Alpha IJI .. D 1,000 ml Il! 0 HN03 til' Other (specify) ~ 0 Sample volume 0 ijI [j . b-et\e,f'''\ ~or-~~J\ i c.~ If preservative is used, specify Type and Quanllty or Preservative: ~Commcnt .y See instruction A,.r;\J~ on ~r\~ ~J 07115 , -r~"'t'1tr Uolhcl~~ Mtt ~tIV\ PAI~u on .$i1c -Gr ptA\je ~nct ~lAt"Irll~ eD<:.n+. ?\A"~~ be~o.tl':(\ o7'f.D. f\A,.~~l W'-eil .~~ "-+,*"l o~ ~70 Mlrf~h$_ Wo.:~c.r WG\.~ mosH~ (.\.::(:'.,-+h('o~hot.d .pv.rBte . .' . ~ . , r Pv..r~c:. enAeJ. o.nJ. Sa.Mplc..$ Wef'C' c:.()Uc:d'~J ~+ \~O. Le~ ~J~ ,,-t 12.32. Depth tX+1-c(' pu~e. \AX.l.S S:)'·Y7 While Mesa Mill N q D. 0 I5i1 0 I$l 'trdiJata Worksheet for Groundwater ~ 2 of2 capturx' <oOlHr'UE .,."fH..,.4 ..... n.--FU .. "TION.~"V MHI IGroundwater Discharge Permit Date; 03/22/2010 Rev. 6 ,6roundwater Moniloring Quality IUsurance Plan (OAP) ) AITACHMENT 1 : OENI50,})~ J WHITE MESA URANIUM MILL Auachment 1 ; )' See instrucl101l ;,f ......... ~ fit.!!"f!.,_ .. _._~ . FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: I y--n-. Qv.o.r~<.r &rou,.rlJ\.J.}o...t~(" ~OIO Sampler Name and initials: I1AilOt:i He.l1;t:\I4,!j ,-H Location (well name): ..... 1 _M;....u.W~-!;t=:;;g'--______ ---' Date and Time for Purginm 1l7;~/a.o )0 and Sampling (if different) I.-..:<N~/A~ ____ ---, Well Purging Equip Used: 00 pump o@bailerWellPump(ifotherthanBennet) IJ-...;:Q~· ...:t:..· .:::D=--__ -' Sampling Event I SeMI t>..nn\AA\ &IN Prevo Well Sampled in Sampling Event I M W-J.7 pH Buffer 7.0 0 7.0 pH Buffer 4.0 Specific Conductance I qqq IJ.lMHOS/cm Well Deptb(O.O 1ft): I He. 00 Depth to Water Before Purgin~ 77.4<\ Casing Volume (V) Conductance (avg) I ..... · _..,.;. ...... 4 ..... 0_D_·~"-· ___ ..... 1 pH of Water (avg) Well Water Temp. (avg) J y .'-\~ Redox Potential (Eh)1 4'"\'=- 4" well:/ :;ll .;t?> /(.653h) 3" WeJJ :L... _O,;;...-_--I(.367h) 5 .7-:3 . Turbidity 1 .... --=-0 __ ..... Weather Cond. Ext'l Amb. Temp. DC (prior sampling eveilt) I 3" G. I Time III~D I Gal. Purged I 'i~.:" \ I I Time I 1131 I Gal. Purged I ~;l..S3 I Conductance I '-i OQ1 I pHI 5.75 I Conductance 1l10D\ I pH I 5·73 I Temp. DC I 14.4'1 I Temp.oC I 14 ."i~ I Redox Potential Eh (mV) I 43~ I Redox Potential Eh (mY) I 9~'1 I Turbidity (NTU) I 0 I Turbidity (NTU) I C,) I Time I 115~ I GaI.Purged I '-ll.. .7i:\ I I Time I 1I~~' I Gal. Purged I 14~.'1b I Conductance I ~O~j I pH f 5·73 I Conductance I ~Q05 I pHI 5,7,1 I Temp. "c I 14 I.\] I Temp.oC I 14."1'1 I Redox Potential Eh (mV) I ~~b 1 Redox Potential Ell (m V) I Y45 I Turbidity (NTU) I Q I Turbidity (NTU) I Q I White Mesa Mill o:&.td'Dala Worksheet for Groundwaler ~ 1 of2 capturx' COMPATi8LE W'lH,.,<t.",.tr--FUNCTODW.ALITY ~iII . Groundwater Discharge Permit £{oundwater Monitoring Quality Assurance Plan (O,AP) . \ I Date: 03/22/2010 Rev. 6 Volume ofWaler Purged I '-l~.'-\O gallon{s) Pumping Rate Calculation Flow Rate (0), in jm. S/60 = I . J.i Time to evacuate two cnsing volumes (2V) T = 2ViQ = I 195.~$ I Number of casing volumes evacuated (if other than two) If well evacuated to dryness, number of gallons evacuated Name of Certified Analytical Laboratory if Other Than Energy Lab~ A'WAt \ $e-r otVOl.s Type of Sample VOCs Nutrienls Heavy Metals All Other Non Radiologies Gross Alpha Other (specify) (;eY\ufA,.\ Thor~t\\c:..) iConunenl , . . White Mesa Mill ~d'Oatii Worksheet (or Groundwater fb~ .. : Sample Taken Sample Vol (indicate if other than as y N specified below) )~ 0 3x40 m1 (iii :0 lOOml . f:iJ. p 250ml til . -O '~-_ 250mI - riI O. . 1,000 tnt . Ii] 0 Sample volume Filtered Preservative Preservatjve Added Y 0 .. q~ " til 0 19 0 N ,51 JE O· .. j! .0 til Type y H~ ~ H2SO4 m :Hf,f03 Jil No Jireserv. 0 ijN03 g) 0 If preservative is used, speci1)r Type and Quantity of Presen'ath,c: , See instruction ~;i" N 0 .0 0 ijJ 0 IJiI 2 of 2 capturx' CO"'Hlal£ WITH~'''''rW-F''NCTlCN.LlTV Mill -Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Glbundwater Monitoring Quality Assurance Plan (QAP) . - ! f A TT ACHl\lENT 1 · OENISO.}) WHITE MESA URANIUM MILL Attachment I r'/ s.:c insllUctkon MINES FIELD DATA WORKSHEET FOR GROUND WATER ~ ""-"-"~----- Description of Sampling Event: I y""h . Qv.c.rter G-CQV.Y"c.\.wo...\~ ;tole Sampler Name and initials: 1~l\nU" H 0 H,JA~ Location (well namc):I'-__ M....;.W_ • ...;:~_f\..L.-______ ---' Date and Time for Purgin~ 11/'1/ ~OIO and Sampling (if different) NIp, ~~~-----------' Well Purging Equip Used: [[] pump or@] bailer Sampling Event l2?e./I''!IlhQI\W G-W pH Buffer 7,0 7.0 , Specific Conductance I 'l'ltJ I~MHOSJcm Depth to Water Before Purgin~ 1 O~. ~:5) I Well Pump (if other than Bennet) 1-1 _Q=-.;e;....;....p ___ --' I MLVw3D Prevo Well Sampled in Sampling Event L.. _________ .....J pH Buffer 4.0 Well Depth(O.Olft): 1;t7,OO Casing Volume (V) 4" Wel1:llb.1b 1<.653h) 3" Well:I.-, ~O~_....J(.367h) Conductance (avg) ,---,ql-:'1:...::3>L..4",1",;'~&?-=-__ ....,j' I pH of Water (avg) b .Ja.?6 Well Water Temp. (avg) 11:\ .S\5 I Redox Potential (E1l)1 :l q, w; Turbidityl g. ~5 Weather Condo Ext'l Amb. Temp. "C (prior sampling event) I b ~ (.. I Time I 15bO I Gal. Purged I. 31 . q,b I Time , I \50\ 'I Gal. Purged I 31. ~8 I Conductance 11.)138 I pHI ".O~ I Conductance 1413~ I pHI b.Oq I Temp,oC I )1:\ .5.\ I Temp.oC I t~.56 . I Redox Potential Eh (mV) I 3()~ . I Redox Potential Eh (my) I ~j.8 I Turbidity (NTU) I .~ .Li j Turbidity (NTU) 18',,{\ I Time I I~O~ ] Gal. Purged I 3,1.g~. I Time ( 1.503' I Gal. Purged [ 3 ·;l· Ii I Conductance I ~7~ I pH I ,.~: I Conductance [ QZ30. 'I pH I l:,.17 I Temp.oC I Hi·~~ I Temp. <)C I 1'1·5;1. I Redox Potential Eh (m V) I ;).,t17 I Redox Potential Eh (mV) I .l~D I Turbidity (NTU) I g •. j I Turbidity eNTU) I 1(.3 . I White Mesa Mill ~d'Diltil Worksheet for Groundwater ~ 10fl capturx' (OIol."TlBL! w,tHA.t7rTr--'UHtroONALlTY Mm·, Groundwater Discharge Pp.rmit Date: 03/22{2010 Rev. 6 ~roul'ldwater Monitoring Quality Assurance Plan (OAf) Volume ofWa(er Purged I 3d. .£'; Pumping Rate CalculatiQn Flow Rate (Q)~ in gJ:>m. S/60 = I . .:t17 gallon(s) Time to evacuate two casing volumes (2V) T == 2ViQ = I 1'19. 'is I Number of casing volumes evacuated (if other than two) I I-' ___ ---I Ifwcll evacuated to dryness. number of gallons evacuated Name of Certified Analytical Laboratory if Other Than Energy Labl AWAL t ~d· 0+ vCX:s Sample Taken Sample Vol (indicate Filteted Preservative Type of Sample 1 [ other than as y N specified below) Y N Type VOCs .~ 0 ·,; 3x40.ml. J 0 ~ HCL ~. J NULTienlS "$) . D . 100m! . 0 . ... ~tf lUS04 Heavy Metals '~. .~ ~50ml.. ,18, -. 0 ,Hl\[OO Preservative Added y N S 0 ~ . O~ 'l! .. '0 AU Other Non Radiologies , G1 0 ,250ml 0 "'.~ No Prescl1V. 0 00.'" ,. Gross Alpha ,D .. p , 1000 nil , . .~ '0 ' ,HNOJ ijJ - Other (specifY) --Sample volUme ; fit ~ f 'Gl M [] .. &cnctCJ.\ ::tno .... ~o.nl(.~ If preservative is used, ~pccify -Type and Quantity of Preservative: . j ~ ~ ?'Commeot ;9 See instruction <. . Ar. .. ,,,c.~ 6" ~ 't, ~ ~, ~nncr J.ll.)l/;all.~ 6i'Iu.. &-"'1'1"1(\ p,.,,/'ncr F~e()1 ~r plAr~~ emJ... . ~G\MF"lf'd -e,,~ft+' ?"'f"~c.. h~<M (}.-t 1;'t35, P;.o..r~c£\ w ~H .for ;\. t~hd ot .J50 ~,I)\A.f<s. v..)c..tu .,.,)~ "'~~+I'a l'~w-1\ro~h~""·P~C. ru.C'~G -en4c.c\. «.\fl41 :i"'Mrl~~ u.>c.re <.ollecteJ ... t-1.505 Le¥\--~i'c ~t lS lb. White Mesa Mill 0 -. f,iI ~d"Data Worksheet for Grolmdwater lD:~ 2of2 capturx' CO"'ATlBL£ WFTH,..A • .,W--fU"tTlONAUfY ',' Mill -Grou~dw"ter DiS(harge Permit GtCJundwater'Monitoring Quality Assurance Plan (QAPI ) Date: 03/22/2010 Rev, 6 A TI ACHME~T I Attachment I OENISO,.!), WHITE MESA URANrul\l MILL / SceiU.~ll'Ucli,'JD ! MINES _ FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: I y r"'-Ov p..,r h.c 6 r c/U lI.J..,w ... teo,.. ¢O\Q Sampler Name Location (well nrune):1 M W -"3 D and initials: I G .:...r,.i (> (5;,,111"\« r / be Date and Time for purginm II /9 I d. Cli 0 Well Purging Equip Used:~pump o@ bailer pH Buffer 7.0 0-1-17 ............ 0"--__ · ...... 1 Specific Conductance 1-1 ...I9....19..,j'lI..--__ ...... 1 ~HOSI em Depth to Water Before Purgin~ 76. 58 Conductance (avg) and Sampling (if different) Well Pump (if other than Bennet) Prevo Well Sampled in Sampling Event I-1_M_W_._3_J ___ ---' pH Buffer 4.0 4.Q Well Dcpth(O.Olft): IHOnDO Casing Volume (V) pH of Water (avg) 4" Wen:~( 653h) 3" Well:~(.367h) Well Water T~mp. (avg) IILt-"t'1J5 Redox Potential (Eh)13g't.).5 TurbiditylL-_O~_----I Weather Condo I D ~r_'~_r_+_l_y __ L_·_tu_v __ ~_y ________ ~ Ext'l Amb. Temp. ·C (prior sampling event) . rJ '---"------' Time lid. \.5 I Gal. Purged I ~:.;.i.{C I Time I I~l~ I Gal. Purged I 43,61 I Conductance I ).01'\ I pHI fo7D I Conductance I ~,g3 I pH f b.'11 I Temp.oC I I Ii .I~$ I Temp.oC I l\.j '4S I Redox Potential Eh (mV) I :s~g I Redox Potential Eh (mV) I 3:7 I Turbidity (NTU) I .0 I Turbidity (NTU) I c I Time 11~r7 I Gal. Purged I ~:5,~ I Time I 1~l g I Gal. Purged I ~~ ·05 I ConduClance I ,,"0,83 I pH I b 70 I Conductance I ,.lo7'l I pH I ~.15 I Temp. roC I 19 ~3 I Temp. DC I 19 "-L~ I Redox Potential Eh (mV) I ~~3 I Redox Potential Eh (mY) I ~7tt ) Turbidity (NTU) I 0 I Turbidity (NTU) I 0 I White Mesa Mill ~d{)ata Worksheet (or Groundwater '" i J.~;d =..;m: 1 of 2 capturx' CO .... "OL. W'THA,,,,,,n,---ru .. <TloN.ltfy Mill • GtOu"ndwilter Disthilrge Permit Date: 03/22/2010 Rev, 6 Groundwater Monitonng Quality Assurance Plan (QAPI Volume of Water Purged I Y'i , y~ Pumping Rate Calculation Flow Rate (Q). in gpm, S/60= L 217 gallon(s) Time to evacuate two casing volumes {2V) T=2V/Q= 1;lc2L 13 I Number of casing volumes evacuated (if other than two) If wei I evacuated to dryness, number of gallons evacuated Name of Certified Analytical Laboratory if Other Than Energy LabiA lJ AI.. 5(:." y£ ~ Sample Taken Sample Vol (indicate Filtered Preservative Preservative Type of Sample if other than as Added y N specified below) Y N Type y vacs f8 0 3x40ml 0 -Gil HCL ,~ Nutrients ~ G lOOml 0 til H2SO4 Iia Heavy Metals BI 0 2S0ml $I 0 fINOJ 1Il1 . " I All Other Non Radiologies Gross Alpha Other (specify) G~A~I r:. tit. " ,. !!:P-"'" ., S :~ornment B1 Ol,! Ill' 0 Bl 0 250 rnl .Q ~ NoPreserv. II 1,0000ml 'fia 0 ~O3 :~ : Sample volume 0 il 0 If preservative is used, specify Type and Quantity of Presen'ative: See instruction ~ArMV ~J... 0-.s.H-c:.. 0.'''' C'$'i 7. ,..~ ....... ~ c..-...A G"..,. .... -p.,..e-se,./\,+ ~t,..r pv~e-e-~ ..st~lN\,~l."'::J e.-ve.."",+. "v""b~ l>e;.",~ OI-T "~5S. f'v.r~c:.A vJ~11 for ~ icto.l of' .20.5 M~i1u.te.s. v.J",1c.r...,~ ,."o~tI4 Lko.r ~rov.~ho\,\.t rUf~e. fv.r~c. ~"Jca MJ. 5a.Mfl-e~ VJ cr~ ~i/e-~+(ja o-.t 1?-2~ 1. ~ .> it"-0-+ 1.l31 . • White Mesa Mjll Oept-h o-~e(" pV,("5e: 11.31 N 0 0 0 18 0 ~. ~~.{}ata Worksheet (0' Groundwater !=,,~ 2 of2 capturx' tOM"""Ll ""THA"'~fUNCTIO"AtITY M10I • Groundwater Oischargl! Permit Date. 03/'12/2010 RPII. 6 'Groundwater Monitoring Quality A~surancl! Plan (QAP) A IT ACHMENT 1 . OENISOt!.)..4 ~. WHITE MESA URANJl1M l\ULL Attachment J I. ::;,i. Sa: instru~lloll 1 MINES : FIELD DATA WORKSHEET FOR GROUND WATER _,..'-_ ••• ; ___ ........... ~ __ : .... -J D~~~ooof&~l~Ew~· 1~_y~~~Q~~~~~r~~G~r~6~r~o~~~n~d~w~'~.~~~if~~~~O~I=C __________ ~ Location (well name): .... 1 _i\\""'"W~-=3;..;..1 _______ ---' Sampler Name and initials: 1·1;01\" H y I I.~a~ Date and Time for Purgin~ I II/ q /lCIO Well Purging Equip Used:OOpump o@ bailer Sampling Event 1,>~p\\Anl)v.t>. \ lTw pH Buffer 7.0 7,0.1 Specific Conductance\-I _'1;...:'\:o.-" __ -.JIJ.ll'.1Hos/ em Depth to Water Before Purgin~ bg ,7 ~ Conductance (avg) and Sampling (if different) 1,.........;N.c.....;...."/:;..::A:...-. ____ ... '1 Well Pump (ifother than Bennet) ,-I _Q=-...;:_D,-. ___ -'I Prev. Wcll Sampled in Sampling Event .... I_N._·~_~_ ......... _____ --' pH Buffer 4.0 Well Dcpth(O.Olft): I 130.06 Casing Volume (V) pH ofWalcr (avg) 4" Wen:~(.653h) 3" Well:o===J(.367h) , t -,.00.;; Well Water Temp. (avg) I I~ :~\.j 15 .I Redox Potential (Eh)1 ?>'1 C;. 75 Turbidity ... 1 -,0;;..-._--, Weather Condo Ext'l Amb. Temp. 'C (prior sampling event) I 4 (; C Time Ilq~ I Gal. Purged I 1919\() I I I~.u.. I Gal. Purged I j I Time 7'1 ."I~ Conductance 11~13 I pHI i.Ob I Conductance 1 9181Q I pHI 7.00 I Temp.oC 1.414.3S I Temp.oC I 1~·35 ] Redox Potential Eh (mV) I .3~b 1 Redox Potential Eh (m V) I 31~ I Turbidity (NTU) l .~ I Turbidity (NTU) l () J Time 1 1l12-7 I Gal. Purged I 1~.b~ 1 Time I 1'1~23 1 Gal. Purged I 72 .~S: I Conductance '1 I~i~ I pH I ~.Cf ~ I Conductance I JSiJ I pHI 4·'1J I Temp.oC I 19 '35 I Temp.oC I It) .3~ . I Redox Potential Eh (m V) I. 'J>!Jl I Redox Potential Eh (mV) 1 :3<18 I Turbidity (NTU) I -0 I Turbidity (NTU) I 0 I White Mesa Mill :ttd'Data Worksheet for Groundwater ~ 1 of2 capturx' COMHTlOLE wlr~~ ... nr-'''HCTlOH'llrv Mill· Groundwater Discharge Pennit Date: 03/22/2010 Rev. 6 Groundwater Monitoring QlJillity A5surance Plan (QAP) Volume of Water Purged I ~D.c?'f gallon(s) Pumping Rate Calculation Flow Rate (0), in gpm. S/60 = I . .J.l 7 Time to evacuate two casing volumes (2V) T = 2 V /Q = I .3 b ~ . :i -; I Number of casing volumes evacuated (if other than two) If well evacuated to dryness, number of gallons evacuated Name of Certified Analytical Laboratory if Other Than Energy Lab! AWA I.. I.!.d bt 1.1.0'.> Type of Sample VOCs Nutrients Heavy Metals An Other Non R!ldiologics Gross Alpha Other (specify) 6-co<.('(,1.\ "Ll()r~M''-~ ,Commenl White Mesa Mill ~d-{)ab Worksheet for Groundwater 'Pfi~l2I fa:::Ei Sample Taken Sample Vol (indicate if other than as y N specified below) m' 0 3x40ml rii'J 0 lOOml Ii1 [J 250ml .. 1iI . 0 " 250~1 ~ 0 1;000 ml [jJ 0 Sample volume Filtered Preservative Preservati \Ie Added Y 0 P . ri 0 ~ , 0 N Type y N iii HCL ~: 0 [)I . H2SO4 ri1 0 '0 HNQ3 ~: ~[J 5i)' NoPreserv. 0 00 0 HN03 !Sa J 0 @ 0 ~ If preservative is used, specify Type nnd Quantity or Preservative: See instruction 2 ot2 capturx' COM.ATlBLE w" .. ,4,,,,.n.--ruNCTlOHA~ITY Mill· GrOlJndwater Dlschargt!! Permit Date: 03122/2010 Rev. 6 Grotln""dwater Monitoring Quality Assurance Plan (ClAP) '\ • ATTACHMENT 1 1 OENISOt1)~ J: WHITE MESA URANIUM MILL Attachment 1 i;1 See imtruLlUllII "l __ M~~ __ FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event : I --t~ QU.C.('·\lf &('o.W\J.I.0~\c.r ~~\C Location (well name):1...1 _..:..M...;:...:..:w~-~;;:;..2.~ ______ ..J Sampler Name and initials: 1)&",\,," HClili.jc.~ .,.-; l-I Date and Time for Purgina, 1/1012-010 Well Purging Equip Uscd:OOpump o@ bailer Sampling Event I S~rl'ho..n" u.o-\ b-W pH Buffer 7.0 /,0 Specific Conductance I ,\gt\ I JlMHOSI em Depth to Water Before Purgin~ 7'· H Conductance (avg) 40 iI .,S nnd Sampling (if different) .......... /II.:.=.,::lA::!-____ ----I Well Pump (if other than Bennet) IL....::Q::lo...:.e._D~ __ ---.I Prevo Well Sampled in Sampling Event I MW ;1,\ pH Buffer 4.0 1.\.0 Well Depth(O.Olft): I 13",·E) Casing Volume (V) pH of Water (avg) 4" weill ~~. ~.a.. 1(·653h) 3" Well:_ C> .(.367h) t;.0715 Well Water Temp. (avg) I JLi ,OLfJ-S I Redox Potential (Eh)1 ~.ol}.;)6 1 TurbidityU Iii;? Weather Condo Ext'l Amb. Temp. °C (prior sampling event> I 3b" . Time I 1:315 I Gal. Purged I 7'?>.1i I Time I 1'3\ " I Gal. Purged I -'3 A'\ I Conductance 140lQ I pHI b.i3 I Conductance I 40lt , . 1 pH I 6·07 : I Temp. "c I ILl· o'i I Temp.oC I 14 .09 I Redox Potential Eh (mV) I "\~O I ;0.- Redox Potential Eh (mV) I ~10 I Turbidity (NTU) I SS .. ;). I Turbidity (NTU) I ~.5 I Time I )3\1' I Gal. Purged ( l'1 ·~i I Time ( IDIg' I Gal. Purged 114 .'1~ I Conductance I ~~(( .. I pHI C;.Ob I Conductance I ~"O9 I pH I b .05 I Temp. DC I 1~.o.5 I Temp,oC I ".04 I Redox Potential Eh (m V) I ~(); I Redox Potential Eb (m V) I ,300 I Turbidity (NTU) I g~~ I Turbidity (NTU) I ~,5 I White Mesa Mill ~d:oata Worksheet for Groundwater ~ 1 of 2 capturx· COM'A-T1fLl WJ1t+..,A1"".nr-FUNCT10N.lIrv M~I • GJIOUndwater DlsdJarge Permit ql]lUOdwatl!f Monitoring Quailty Assurante Plan (OAP) \ I I Date: 03/22/2010 Re~. 6 Volume ofWnter Purged I 7'1,g(,!) gallon(s) Pumping Rate Calculation Flow Rate (Q). in gptn. 8160 = I .'-17 Time to evacuate two casing volumes (2V) T=2V/Q= I »)q.?1,\ I Number of casing volumes evacuated (if other than two) lfwell evacuated to dryness, number ofgaltons evacuated Name of Certified Analytical Laboratory if Other Than Energy LablAWAl \ ~,+ ;or vO(..j I Sample Taken Sample Vol (indicate Filtered Preservative Preservative Type of Sample jf other than as Added y N s~ified below) y N Type Y N VOCs ~ 0 ~,,4(jlnl '0 , -rs HCL OJ '0 Nutrients J~ .. '0 . rOO nil 0 "~ H2SO4 ~. 0 Heayy Metals ijl t:J ~5.o.m1 511. -P l:lN03 'f!! , ·BJ .. All Other Non Radiologies . f:ll , 0 25.0ml 0 c :fJ No Pre.serv . 0 :~ Gross Alpha . III '0 1,000 mt &J 0 RNO:! fi 0 ~ .J Other (specjfy) Sample volume D 0: 8l .' BI 0 '~l ~ .• /t'.. GroZ."~"~\ 1:nbf·~M;l.~ lfpresctvative is uc;ed. specifY Type and Quantity of Preservative' , See instruction ~COOlment A~r,\J~J.. on ~.itc. A.1' 0130. "iMncr Ht>u.a~~ o.l'\A 6-W(11'I ?bJ~CI prGSGhl ~ot" f",re< q..f\~ ~lA.""f\'t'\~ ~"c.nt. ?Ul.r~~ bejo.t'\ ~t 07'3:5 , 'Pv..~~fO-w~1l tor tJ.... +~tc>..\ 0+ ~4.5 Mlnu..tGS. Wo-:\-<.r hiA-S ve(~ \".}Hc, c.c>\or~:h()h . F\,Ar~c.. e~ae~ ~(\a. ,.sC\~fle5 ~<r<:.c.ollecte~ o.+-13~C. Len !>I.}". "'\ I~'ll_ De.~ ~·H'Cr p",r1G was !'J;;t.IO White Mesa Mill ~i)ata Worksheet for Groundwater 2 of2 capturx' COIAPATlaU ""TH,...4."'ri:r-fvNCTIONA~ITY 'Mil! -Groundwater Discharge Permit Date; 03/22/2010 Rev. 6 , Groundwater Monitonng Quality Assurance Plan (OAP) · I ATTACHMENT 1 ;fJENISO,/) J ~ WHITE MESA URANIUM MILL Attachment I .{ MIN,ES , FIELD DATA WORKSHEET FOR GROUND WATER Description ofSampting Event: I LITh Q""Cl.1"t-<.r C rol.A1\Jwc\.h.r :;1010 Sampler Name and initials: ['1";nll-<'1' 1'Io/l,'d"j/Tlf Location (well name ):I ..... -.:M~w~-_"3_=1.&..-_______ --' Date and Time for Purgind II /~/~rv and Sampling (if different) Il/rJ.<1 /:;'0)0 Well Purging Equip Uscd:~pump o@ bailer Well Pump (if other than Bennet) Sampling Event >e.m""'llOAA\ 6-W I MW-3t:iR Prevo Well Sampled in Sampling Event L.. ____ '7 ___ -.I pH Buffer 7.0 7.0 Specific Conduetancel-' __ 4-,-' q..:..A-'-_--'hlMHOSI em Conductance (avg) I L..i""b~·~.,;;:h;....· _.....;-..;...:;.... __ -u,1 pH Buffer 4.0 Y.O Well Depth(O.O 1 ft): Casing Volume (V) pH of Water (avg) 4" well:t_~_""--=' ~:...:1""-11(·653h) 3" Well:. 0 (.367h) 7 .31 Well Water Temp. (avg) I t...:c )":::...,~tJk;::'·_--J Redox Potential (Eh)1 J,"1'i Turbidilyl 1~.7 Weather Condo Ext'l Amb. Temp. ·C (prior sampling event) I ~2 c (" I Time t D8D9 I Gal. Purged I I Time I I Gal. Purged I I Conductance I '1;"$Jb I pH I 7.3'l I Conductance I I pH I I Temp.oC I \O .q (; I Temp.oC I I Redox Potential Eh (mV) I ;l7 j I Redox Potential Eh (mV) I I Turbidity (NTU) I j~;l I .Turbidity (NTU) L ] Time I I Gal. Purged I I Time I I Gal. Purged I I Conductatree I I pH I , I Conductance I I pH I I Temp. DC I I Temp.oC I ' I Redox Potential Eh (mV) I I Redox Potential Ell (m V) I I Turbidity (NTU) I I Turbidity (NTU) I I White Mesa Mill ~di)ata Worksheet for Groundwater ~ lof2 capturx-,O,.PAflBn WITt,~,.,·fi,--F\JNCTOONALITY ,\/'Iil!-Groundwater Discharge Permit Date: 03/n/2010 Rev. 6 • Groundw~ter Monitoring Quality Assurance Plan (Q.AP) Volume of Water Purged IL-..._.....;o:::;...-__ -J gallon(s} Pumping Rate Calculation Flow Rate lQ), in gpm. Sf60 == I \0 Time to evacuate two casing volumes (2V) T=2V/Q = I ~ D<l7 I Number of casing volumes evacuated (if other than two) o If well evacuated to dryness, number of gallons evacuated ,0 , Name of Certified Analytical Laboratory if Other Than Energy Labl A wilL 1 ~e1 or \}O(,s ,I Sample Taken Sample Vol (indicate Filtered Preservati ve Preservative Type of Sample if other than as Type Added y N specified below) Y N y VOCs ,I~r .. 0 3x40nd -'0 11,f HeL a. -, ',' , . .- Nutrients :6[, : ,0 " " roo mI-,'. Cl 'r" m: :H2S04 , IE Heavy Metals 'W . -,~ ". 'p,,' 25() Dil -Ii]' "O t . ~ ~O3 IS1J . All Other Non Radiologies ;:'~:£l1 , . -' ,pj 25.O'inl Cl IE No Pres~rv-. .-q , Gross Alpha ')'/ JiiI~ , . ·eJ JiO'OOml Et;l' O· .. . liN03 ff) Other (specify) ~' " . Sample volum'e -' ",-61 ,''', .. tJ ,0 I:tl 0 .~ #" .) -I &e..I'\'Cf£).\ rf'or~a.n \,,~ If preservalive is used. specify Type and Quantity of Preservative: i " ~ ~ iComment ,t~j See instruction Arr . .,Jcu. tlr\ !o;'\c. ().-\ 1.:>33. L"""""1\cr 6,.f\{J. G,;.rr;1I 01\ ~~c. h ~w'~-l w~ I. OrorreJ frw"f )11 VolCiI 6.t\A +~"M~ 01\, Not 1:I'lO~h ~,,\fr h f~r~. r---\\t'~ r-~ /)11,,+ M~ Lt.~ ... :te, ().,t IO'1~ Arr :\leti., 0(\ ~;~<. ",:l-0;,53. f(l..M',. MA. ~"'r;f\ on 50 ;Je. -fo .... ,S'W/fl'hj (!Ve.;If. ~:~ Dc.plh +v \l.')o.~er lo~.Ol>. look '~.d <f:' pG,rq.mchr~ b~fofl: 5t\Mr""'.:r _ \~~ So."""lc.s M~ ~cQ. fo.r~t.tl'" r':"l'1;t ~.:>i-I'l'ec..,,~?\ Mi:\ ... \ ", .. A -&ri!>:':' Alrh~ ~~MrJC.) i1,1l.:~ neu\cQ. ~ .. 'tc"ecl. :'.\.fO\P'I~' IP~'((. ~\r:J..( <>($,0 . t..en ~II( ~t o~~L(. u.)~h:,r ~V.s ~ I j II "(,, J,I.~ , White Mesa Mill N 0 0 .c1 ~ 0 13' _,' ...Ltd·Data Worksheet for Groundwater lA~ 200 capturx' CO".A,oan WI1H,..4'''''ri::--FUNCTlOH'''''' I Mill ,;'(jroLlfldwater Discharge Permit ) . ) Date: Q3/22/2010 Rev. E Gr(;!lndwater Monitoring Quality Assurance Plan (O,APJ . AITACHMENT I i ()EHISO,})j I WHITE MESA URANIUM MILL Attachment 1 :'-:,,:i Silt: instructioo ~ ' .• ¥INES . _~ FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: I o/h Q~'r ~(.,.. 6-r~Ij,tW..VJ~J"-(.(" ;)..0\0 Location (well name): ...... 1 --'-M.a..:\N~·-.500:\'-yl..JB.i..lo,-______ ....Ii I Sampler Name and initials: 11t\r'lI)~r J1,;.i/.J<i';J/nt I pate and Time for Purgin~ J1 J ~/~OJo and Sampling (if different) &....-A....;....;..I.V,.o..!;,tf. _______ ..... , !Well Purging Equip Used:@]pump o@ bailer Well Pump (if other than Bennet) I .. 6;~nifas j i t Sampling Event I .s~n'\;L"nn\l,~' &\J Q..o,c Prevo Well Sampled in Sampling Event 1 -I I I pH Buffer 7.0 "1. D I Specific Conductance ...... 1 ~:'--I.qq ...... ~f--_...:-...JIJ.lMHOSI em J Oepth to Water Before PurgingJr-. -. -0-. .,--..., Conductance (avg) fo .O pH Buffer 4.0 'i.D Well Depth(O.Olft): ;tI/I} Casing Volume (V) 4" wen:t_D ____ -tI(.653h) 3" Well:_ 0 _ (.367h) pH of Water (avg) ~ .. $'1 Well Water Temp. (avg) \.;l..O ] Redox Potential (Eh)1 3&'{ 0 TurbjdjtylL-----'O~_ ... Weather Condo Time I.D06 I Gal. Purged I IJO Conductance I b .. D I pH f g.ftti Temp.oC I LU> I Redox Potential Eh (mV) I 3,gO ' I Turbidity (NTU) 1 .0 I Time I I Gal. Purged r , Conductance I I pHI Temp.oC I I Redox Potential Eh (m V) I I .1 Turbidity (NTU) I I White Mesa Mill ~d"Data Worksheet (or Groundwater ~ I I I I . Ext'l Amb. Temp. ~C (prior sampling event) 1_; i.I o.c:.I Time I I Gal. Purged I I Conductance I I pH I ' I Temp.oC I --I Redox Potential Eh (mV) I I Turbidity (NTU) I I Time I ] Gal. Purged I I Conductance I I pHI , I Temp.oC I , I Redox Potential Eh (m V) I ' I Turbidity (NTU) I I 1 00 capturx-CQM~ATlaLE w1rH".,:t. • ."n,.--FuNcrloNA"n Mill .~G~oundwater Discharge Permit ) ) Date: 03/22/2010 Rev. 6 GrOUndwater Monitoring Quality Assurance Plan (ClAP) Volume of Waler Purged 1L.---1IL.::1<s~O::""'_-J gallon(s) Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = I 10 Time to evacuate two casing volumes (2V) T = 2V/Q = I AI/A . I Number of casing volumes evacuated (if other than two) If well evacuated to dryness, number of gallons evacuated Name of Certified Analytical Laboratory if Other Than Energy Labf ItWAL , I ~C~ 0\' \10(.':1 Sample Taken Sample Vol (indicate Filtered Preservative Preservative ~ ~ f, Type of Sample VOCs Nutrients Heavy Metals An Other Non Radiologies Gross Alpha Other (specify) (,-encrg.,\ 1." 0 f".."\o.rll~ y , ''':'' J'IJ. $.', . ijJ ' " 'ijI " , , .. ijl , . til jf other than as N specified below) 0 3x40m1 0 100mI 0 .. 250m1 0 250ml '0 l,OO(l mt 0 Sample volume .. Added Y N Type y 0 , ri]. ' .. I! HCL 0 III .~ H2SO4 .~ .. lSI' 0 f[N03 I!r .. O . 'rJ, .. NoPre;;erv: 0 'iji 0 HNOJ I!I !J 5,). 0 If preservative is used, specify Type and Quantity of Preservative: !Comment .,/1 See instruction Afr\\)~ on ~:~c ttl D<\.50. ""'GMt(' ~n~ G-~fn" on $;fe ·for ~in~A·h~ ""tel S(l""f)1.~ evenf-· Pv.1'1fcA r:.~ &",\\Ol"~ or 1\,;'" ~4rc("1 so &411j)t'I~ ,jO'lP wetter, ~II" SO cTAI{on.J ".p- ()r. ~o-\cr. R;Il~""r~ ~4."l("~t"J. A:T Cl.\~S. ~~t\~GLt:: ~na1!A Ci.flA ~Q~ph;5 UJefc.. l.o\let::fec\ 0-\ lOt\.. leH-~Jc. a:r IOl~. White Mesa Mill N 0 0 0 nJ: D. m ~Id-oata Worksheet for Groundwater !M~ 2of2 capturx' COM.ATIBL< w""A • .,,n,--FONCTIO ..... ,,. <, .. . ~ . Mill· Groundwater Discharge Permit Dale: 03/22/2010 Rev 6 Groun"awater Monitoring Quality Assurance Plan (Q,APJ A IT ACHMENT I :OENISOn~ , WHITE !\'IESA URANIUM MILL Attachment 1 ~,rY Sec: instruction ;L-,!'U~ES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: I 4Tn Q\AAr+~('" Crro\Af\JiPo..tu-' ~OIO Sampler Name Location (well name)~ .... -,Jv. ___ w_·.;::;3.5 ________ ---, and initials: honer /-Jon.,;" */TI+ Date and Time for Purgind ) I/3D/ ~D'C and Sampling (if different) ~lllRoa.:.../..L.tLi..sc.~=();.:.l!rO~ __ -, Well Purging Equip Used:!1i;J Ipump o@ bailer Sampling Event I Sel"'l' o-nrhAu...\ Crw pH Buffer 7.0 7 .0 Specific ConduetanceL-1 _4:...q:...J11--_---'I~MHOS/ em Depth to Watcr Before PurgingJ II~. 7r;... Conductance (avg) Wcll Pump (ifotbcr than Bennet) Prevo WellSamplcdinSamplingEvent I JIll w-j4 pH Buffer 4.0 y.o Well Depth(O.OI ft): Casing Volume (V) 4" well:1 7. ('4 3"Well:. 0 pH of Water (avg) i(·653h) (.367h) Well Water Temp. (avg) I ,!!o.g7 Redox Potential (Eh)1 ..l. 71 TurbiditYL-1 "7_8::::.;3:.-_-, W cather Cond. Ext'l Amb. Temp. °C(prior sampling event)1 ;Z 0 <.. I Time I jli~O I Gal. Purged I !; I 11L{~O I Gal. Purged I , I Time Ie) Conductance I '3t~bi I pHI i.S'f I Conductance I ~)..l~ I pH I -r·37 I Temp.oC I 1~,e7 I Temp.oC I 14·1q I Redox Potential Eh (mV) I ?K5 I Redox Potential Eh (mV) I ~7g I Turbidity (NTU) I J51._K J Turbidity (NTU) '-b'l3.' J Time I 14'~' I Gal Purged I I~ I Time I I Gal. Purged I I Conductance I ~11O I pHI 7 .... b I Conductance I I pHI I Temp.oC I 143,$ I Temp.oC I I Redox Potential Eh (mV) I ~1~ I Redox Potential Eh (m V) I I Turbidity (NTU) I \50 5 I Turbidity (NTU) I I White Mesa M~I ~~O~ta Worksheet for Groondwater lof2 capturx' COMPAT'OC< W'T~.,4'&~FUNCTIONUITV Mill -Groundwater Discharge Permit Date: 03/7.2/2010 Rev. G Grour1'dwate~ M'onitorjng Quality Assurance Plan (ClAP) Volume ofWaler Purged '-1_.....;lG~ __ --J Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = .... 1 ---..;I"--"D __ ---' 1'1 gallon(s) Time to evacuate two casing volumes (2V) T=2V/Q= I 1 ,.5~ I Nl.lmber of casing volumes evacuated (if other than two) If weB evacuated to dryness, number of gallons evacuated Name of Certified Analytical Laboratory if Other Than Energy Lab{ AWAl.. 1 ~d cJ;vo~ I Sample Taken Sample Vol (indicate Filtered Preservative Preservative Type of SampJe if other than as Added y N specified below) Y N Type Y N VOCs 6:1 0 3x40~I 0 a HCL E6I 0 Nutrients . ij1. 0 IOOm1 0 fjl H2SO4 ~ 0 Heavy Metals 5;! 0 . 250ml ~ 0 HN03 ~. 0 All Other Non Radiologies 'ra 0 250101 0 15 NoPreserv. 0 ~ Gross Alpha EY 0 1,000 ml IB '0 fIN03 III 0 Other (specify) fiJ· 0 Sample volume 0 Iil 0 tyJ &<Jl!fGl.' j;'(\D\~£\"~C~ Ifpreservative is used, specifY Type and Quantity of Presenrative: :4'J'''" , See instruction AHi\)e.c\ 0('\ S ;+e ~t' l'i;;2.) ,~;r'M1I1cr a.nt\ ~ti.rr ;~ 01\ S ,'~c -+0(' p\.t\5~ ~nA SGi/"'lpJi'j eV~ir-t. P~r&<. be~o..n £\.t 1436, r-~r~~~ LVd l t(lr "'--hJ"" o( I I~:,,"t-c 4nJ .so ~c."(.I .. :lna~ 10~r! Ran Or~ I, w",tcr ~~ ~:n~\;/\,.)h;t<., P\.\':j~ eflJed a.t-143~. Left ~ ii-c .. ,-!-" 14YO. At,.\~ on ~i+c. c).~ O~7. "'1';.nnc.r Q,nt (."'().rr '" p.~n-\ ~o S"MP/C. wlli. O<pl-l-h ~OoI~V u)G\\ 1/.:l.:"'~, 5,o.Mplc.~ W~r(.. &.\~ u.:\-08~_ v)c. IJ$w,. tJ.. po.r .... r.~l,<... f>~ -h tmcr tk ~t4\)~ md-4' .,,,J 8f"e..s.s ~lpJ!4 ~ ~. L~\-t !>\t~ ~~ u~5l White Mesa Mill ~d'Oata Worksh~et for Groundwater !h,,~ 2 of 2 capturx' CO"'ATlllt wITH,.A,,,,.n:-FuNcnONALITY Milt -Groundwater Discharge Permit Date: 03!Z2/201 0 Rev 6 '-G'roundwater Monitoring Quality Assurance Plan (MP) ) ATTACHMENT 1 ()ENISOrll J: WHITE MESA URANIUM MILL Attachment 1 j: See instruction MINES HELD DATA WORKSHEET FOR GROUND WATER Mil. i Description of Sampling Event: I \.l"'~ Q'-'-O.rh:.r &1"'o\.?:(\~wo..·\-(!.r .;t.0IO Location (well name}:I..1 _....:.J\t...;.w~~~(:,.~5~ ______ ---' Sampler Name and initials: I "'1';~"u 110 I /'"J" y Dare and Time for Purgins 11/10 I ~() iO and Sampling (if different) I-::-#....:./.....:.;..:..~ _____ --' Well Purging Equip Used: [][Jpump o@bailerWeiIPump(ifotherthanBennet) L.1....:.Q~E~l~D ___ -" I I I\\W~q Sampling Event S-e.ml CbnO '4Ih\ frW Prevo Well Sampled in Sampling Event 1... _______ ---' pH Buffer 7.0 ~[ _----'·1....:..-=O~__.J Specific Conductance[ 'l'\g, I JlMHOSI em Depth to Water Before Purgind i ~ . ./ I Conductance (avg) 4011 . & pH Buffer 4.0 4 .0 Well Dcpth(O.O I ft): [ 13~.S Casing Volume (V) 4" Wcllj 3b. ~~ 3"WeIL C pH of Water (avg) i(·653h) (.367h) Well Water Temp. (avg) 1l~.D'il5 Redox Potential (Eh)f 3oq.J..!:, I Turbidity' ~.'1S Weather Condo Ext" Amb. Temp. vC (prior sampling event) I :3 "c I Time I I Gal. Purged I I Time I I Gal. Purged I I Conductance I I pH I I Conductance I I pH I I Temp.oC I I Temp.oC I . I Redox Potential Eh (mY) I I Redox Potential Eh (mY) I I Turbidity (NTU) I J Turbidity (NTU) l . I Time I I Gal. Purged I I , Time I I GaL Purged I I Conductance I I pH I I Conductance I I pH I I Temp °C I I Temp.oC I I Redox Potential Eh (mV) I I Redox Potential Eh (m V) I I Turbidity (NTU) I I Turbidity (NTU) I I White Mesa Mill ~'l)ata Worksheet for Groundwater !i,oI~ 1 of 2 capturx' COM'."llt W'THA-".n.--'U"CTlO"~LtrY Mill GrOllndwater Discharge Permit Date: 03/22/2010 Rev. 6 _ G'rollodwatl!!' Monitoring Quality Assurance Plan (0Af'1 Volume of Water Purged I 7 j. ~ (5 gallon(s) Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = I . =t 17 . I Time to evacuate two casing volumes (2V) T=2ViQ= I 339, .37(( I Number of casing volumes evacuated (if other than two) Ifwell evacuated to dryness, number of gallons evacuated Name of Certified Analytical Laboratory if Other Than Energy LabViWA1. 1.set r&VOc:.~ Type of SampJe Samplc Taken y N VOCs ~ 0 Nutrients a .,0 Heavy Metals '. fill, : Of All Other Non Radiologies , ~ 0 Gross Alpha _r'.!. 0 Other (specify) 'E;Jl 0 (,.~Gt4\\ :tnCl("¥,1I1 (.,~ I t :; ~Commcnl White Mesa Mill ~-oata Worksheet fOf Groundwater Sample Vol (indicate Filtered ifother than as specified below) y N 3x40 nil 0 S 100ml 0 Ci: 250ml .m. q . 250 nlJ . ' 0 ... · ~ .1,000 mI ;[i, '41. Sample volume d Ii! P reservati \Ie Preservative Ad4ed Type y fICL Sl H2SO4 l'!I HN03 '1i:I . No PreserV .. 0 ." HN03 ~ 0 If preservative is used, specify Type and Quanllty of Preservative: See instruction ,/1 N 0 0 q 1'9' .' 0 61 .' MW 3~ 2 of 2 capturx· COMPAT'el.! wor"~,."n,--'VNCflON'"TY Mill · G,toundwater Discharge PermIt '\ Gr.oU1ldwater MonltQrinl Quality Assurance Plan (OAPj ) AITACHMENT 1 WfllTE MESA URANlUl\Il\fILL Attachment I , " ~/i~ Sc:e iustruction FIELD DATA WORKSHEET FOR CROUND WATER Location (well nnme):L.1 ....J..M..:.~~';....' -~7.;..O _______ --J Sampler Name and initials: I ,..~"" u Hof./; "'\~/11+ Date and Time for Purging l' I'\~I ;z..OIl:> Well Purging Equip Used:rmlpump ofo I bailer Sampling Event Se:M;IAOO\J.,~' bW pH Buffer 7:0 :..;' '\ ,'.,C .. ; ~ Specific Conductance I ' '''''~' , " " JlMHOS! em Depth to Water Before Purgil1~ 7'0.70. Conductance (avg) and Sampling (if different) Well Pump (if Qthcr than Bennet) Prevo Well Sampled in Sampling Event I ~ w -:-I~ , pH Buffer 4.0 I, ~.O Well Deptb(O.Olft): I. 134.'OD Casing Volume (V) pH of Water (avg) 4" well:, ~'<35 .1(.653h) 3" Well: . 0 _ ' (.367h) Well Wat~r Temp. (avg) Redo~ Potential eEh)l 313 Turbidity .... I_O_---..:.....I Weather Condo 'I G\Ci'\( Ext" Amb. Temp. ~C {prior sampling event) I 0 6" I ~--------~~----------~ Time I I Gal. Purged (' I Time I I Gal. Purged I . I , Conductance I I pH I .J·, , I Conductance I ! I pHI I Temp.oC I I Temp.oC I , I Redox Potential Eh (mV) I , I Redox Potential Eh (m V) I I Turbidity (NTU) I . 1 . Turbidity (NTU) It , . J Time I I Gal. Purged I. . I Time I I Gal. Purged I , I , . Conductance I I pH t I Conductance I I pHI \ Temp.oC I .' I Temp. QC I .. I Redox Potential Eh (m V) I I I Redox Potential Eh (mV) I I Turbidity (NTU) I I Turbidity (NTU) I I White Mesa Mill j%r.dpata Worksheet for Groundwater ~ lof2 capturx' CQ' ..... Tlsl. w'T .. A",n.--FUHCTIOH""'V Mill • G,foundwater Discharge Permit Groundwat@r Monitoring Quality Assurance Plan (OAP) J Date: 03/22/2010 Rev. 6 Volume of Water Purged I g3 . .5'1 gallon(s) Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = I . '-17 Time to evacuate two casing volumes (2V) T=2VJQ= I 3~O .qb I Number of casing volumes evacuated (if other than two) If well evacuated to dryness, number of gallons evacuated Name of Certified Analytical Laboratory if Other Than ,Energy Labf AwAL ) scf e~ "Oe.:;. Sample Taken Sample Vol (indicate Type or Sample if other than as y N specified below) VOCs ijJ "0 ,_ 3x40ml Nutrients I&-;:Cl .. , lO~mI Heavy Metals .~. ,0 ~ 2S0mi All Other Non Radiologics Ill " . '.. '. CJ _.: 25Qml Gross Alpha .m 0 ,; l,OOOml Other (specify) . -Sample volume '~'. (1 " .. " ". (,.~~r",l :rnO~L\.f\ i"S. ~Comrnent White Mesa Mill *d1Jata Worksheet for Groundwater I=:r~ Filtered Prescrvati ve Preservative Added Y 0 0 .~ '0 \ . f fD . 0 N Type y N m' HC!.. ~ 0 w. .. H2SO4 ,~ . ,,D ,' .,0 , .HN03 ~ 0 I5J NoPre~n:. -0' . 1i!I ~ .' 0 0 HN03 "i1 f ,.0 .' . III 0 121 . . If preservative is lL<;cd. speciiY Type and Quantity of Preservative: See instruction . 2 of2 capturx' ~O"P.1I8L£ WI1HA.&-·.ri;--,uNCflONAlITV TabC Field Data Worksheets Accelerated Monitoring Tab C1 Field Data Worksheets Accelerated Monitoring October 2010 MiIJ -~ Disdlafg: ftrmit ~ MoAiIoriDB QuaB, ABst.!WJOO Plea (QAP) ~("~l~'~M~w~'~Il ______ ~ ..... n.fiir ..... ..l~.~OI() I '. t;;, ~" .. II(~~,~~ '_, Well,.... Bqbi; . I .. b.r ___ - ~· ... M~(\!\k~ &~91f" .. ,~~~. .,~tMY4m! D*-2.'l.SJ11 Itftisioo: 2 ~~JAI ~.I ;.1 .. :.,'t., • ....... 7.0 . '.O __ .. <~ •••• 'I.,_.! ",/t .. : • .; ·.11)·'·· ..... ' ~ ~~~ , •. ~) ~~l'F I • c) ~: '1 < "'~r'Lf t.a .. \ .. " .. • I • ~,~ .. ~'WI4~ ~':'12l';T;I' , ,~~,~ [)~J: r,~ ~;i .. p.oa , \ '. ~ •. ~ :;l7~'f ,,' ~. __ ~J~7~1~7 ____ __ ~ _______ '1~.~4~1 ______ _ ~~~ ___ ?~~~~f,~ ____ _ : l I .73 T~~ __ ~I~~.7~D~' __ __ . ... . I. 1\.:· .... : I .. :' • : ... PdaIdII (iII}~..--:.. J=~ __ :;-.'_' '_ .. ~lBb):...-~'5=-D;....,.,I __ ',. -r.&,. o f"~~. " Q .. • - ,,' .. " ~ ... . t 'J " •• • MiD -water Diidwp I\nit Orouud I.~ QIIIfitJ ..... fllltlQAP) Dale: 11.17 JJ6 Il8visima: I " liMB•ota.., &,'.,1 -: , " . I ~ to' 110 : ••• . . e'-.. ... ,:, ... , . . . ~ . . ~ .. .-'J .. • I 1 ':' . .' ),fiJI-a. ......... ~PernIk 6roaad .... 14uIdIoriDJ QBIIit1 AsIInaCe .... (QAP) DciCiiptDa tI __ r Btleid:. -~-~~dE.~~~~ ~{wetr~l clw 14 .. --_-L.i<:~~~~~~ .. ' p&A.l~er .' __ '~fiir"""..JQ.:~~~*p.~_. Wel ....... ~ {t~;~~_---:> . .,.- s....,-JIveglM~~Jt~ &W~'~~lffi'-,~~ I ~----~I~P----~"~I--- $.(~j19;' .. ,+. J ~f.~' " iii ,n:u~.~.-.-i-"-Uo ..... ~-._~.~~ ~1.~S1 .~ t~'r'';l''~'1~-'"'' -'01 .~,.(j' t • • OD,,~, 3'{30 # QJbduCttmcc :s 'UL. ~ .. " .., " -.k t.' -------~~----- pH b 1:>1 pJI. __ o-;.'_' "--.0,---.;. ____ _ (. " 1~·o2. • \~., ~ • .' : -Orr-: :' Itedol PaMI ..... _-.-......:.2.=-..;'U.;;;........' I __ ...... )'-, ... 'C!;..,' ~~~' __ _ 1r .. ~. 0 .. T~h., ' -:.c __ J _~ __ _ - t .• " " I ,I' L' •• " '. :. .' • 0 JlIIe: 11.17.06 Jeri8ioD; I ( . ~~====~~~ ~~~L .~ .. ======~ __ V~.W,,~· __________ -:~~I~.~~,~1 _____________ ___ ~ :.~. ~~. ~J.'if--,.4 .... ",. .. Plow" (Q). .... SM.).: ~ ~"I to · :6 'J ., . ,. , .: .... , r ~ • r : . f J .1. , . b . ' .. ' J'~ I ~ •• : J .. ~~ .: ... . ' ... :, . _III·.·.'·· . , .. ~ .... ' . MiJt-~~hnait OnJdIIIIwaIrS .......... QuaIiIy .Aaueance FIla (Q.AP) !We: 2.25.D7 RmsbI: 2 -".~.t1~~~.I~ &ro~l..~+~.~. JliU •• '.o.~, 7.0 ~" .. s."."i.u! iii b·.bC TeqaaIBIe. I > ~ '1 .4 I • 1tedol ..... III(B1) ~~ , -r ... ~. __ .1_,, ____ ... d.i.tt ~ "t " 2i!q T""I·~·' ~),..;..-=-=+'1---.-(~--- , .' ~ 1--, e .. , ~~'i P'~'1 .. ~.~_.,..., ,_, __ CcJadFtppm '31.f f.l pJ( . ".", . , ~ ... : . ~.:,'. :J5\~7 .Jr~.' ,. :~.... . 4 ,~~'i.) __ · _,).j .... ,2.~ ___ _ T.,.,.c.' ., .. ' " -. C,· . ~ '~ " , . 1.Ji*: 11.17.06 ReYiPoa: I ,.4Jof41 'fulbidity,--=====:::::-=--:_-~~"~'~'----~---- ...... Ph'f •• • ... ', I , I· , , ( ,: , '(.' ;,/'1' --------------------~------~~~~~~~----~~--------- MiII-0I0uDIIw*r ~PenU 0. ................ Qu8ity AJsunmoe JIlIn (QAP) 0.;:US.61 Jmdon: 2 ...."' ... 1 WBhitMl& ~MJLL ftlJ.,DDATAWO.MDRGROONDWATER ~ofSliaFlifjrmat: t e.t' \hI ... v..n! "i .. r ')1_ 'w • o· '., • l.oo!I!iiIo!I { ..... iIiiiIOl . klltJ '30 . ," ... -d;,~r.r ~."·ia', .~c~;" H .. I .. ,r . ', .. ; . \.:' : .. , ~Bveot M~I\,+'~~n (z~p~!J:8n+s:",. pliSufrer1.0 . /. () , '9Jj. -. ~~ .~ .... ,~.,,, • ~~~~~, .. ~;.' ~.W~~~~J~~~~~ ..... ,. "'.' .I.'. ,(i.i~i;)~;" I f:JaJ,,~. 9PJB~ . ... , .... , 1 _ 1\.". 'I 1","1' ~. .a.o.sf' , ~~ ____ ~~~.1~1 ____ __ Jj . 'f&' • . . ~ •• I ~,~I1"'''',t. ," :l.&,;t, , . , ~~' ______ ~I~O~~,_, __ _ , .. ~,~,.~.'¥>3 ~~. __ ~&~o=~~ ________ _ ~ ____ ~'~7~1~,_,, ____ ~~ ..:.''1 I ~ , I." ; .... I . ,~ " " ~~' •• 'J .. ,,' ..., " . , &fiJj-~~Pamit GrovDdw.i~ Dale: 11.17.06 JeriIioJt: I QIIIfily Aaa .. ,.. (QAr) Row .. (Q), ill ... --') 11 . " " 6WVU'~ c:: I ...... ~" • ,,: _ ',' , .- • \" :~11".; .... Jof41 . .,;"J . .. -' "';. ~i :l.~ , " ...... .. ' , ' " " , , Mil .. 0I0uadwIIr:r ~PenIIt o..,...."MoMbillg QuIit)' Atswao:e HIll (QAP) ~ (WClr~1_'-,A~\.t,IW.)_1M\ ___ "'- ~"'~k~~~==-~l"r~~~Y WelPlQlaB'Iwi/ ~i/~~_ .... ~ s....,,~.cl~n!~'t (,~o~A..~+~'i_ ,81.7.0 ,-',0 .~.' I _, ••• -! •. ./. !",J ~ " ~~qq, • \''''' r' .~~ _ ,.. .. ~ • ~~~~-l~~~~~~~~ ,. ' ~~~,_.--_.~I-------'. I .. t ... • ••• ·4· ":. .. De: 2.'JJH1 ~ 2 -.4CiJ41 ;' , ~>14~1 .0aL~ 19 ,b5 I '.. ~';lti':~ ... ~.r i .! ~;4";;4 V'L" .: ,. ~r }ijK ~ .. ~ 1~)5 , ~ '78>,' Coadl'ctaoc:e ,113 1 < • " , T~~~15~.D~3~ ____ __ Iedox PoItlolill (8011'.., ..,;;;3iioo01?;,.;.,I_, _'"'-_ ...... ·.)........,;;3"\.....--.5 ___ _ 1rMr~. _____ ;_, _________ _ T~l,. _ ... __ .l.~ _____ _ •• ~ . " L'" . ~ .~ ,; I I' -. ,,' .J .. MiU-~PaIIit GrouI2d-'et . IlaIt. 11.11.06 ItevWoo! I ~ AaiWwen.(QAP) ~~I-=====~-~---...w,' _~ -V _"'ISH : °11im1mty,,.t .. " . 1 Plp4J 0(41 V~.W.a~· __________ ~Z~Q~·2~. ~~~.~ ________ __ , t I' ,t , • II,~ . .... ~ . \ ~ ....... p ~ I :.~ : 1;.: ~J.,~, .. • ' I ' '(. ,'ll ----------------------------~--~~~~~----~----------- ., '" \ ' ! • • .~'j .. ,. ~ " MiU-a..tw .... ---iii fnIit 0r0aaII .... MaaiIorioJ QMky~ .... (QAP) DMe: 2.2SJ1I Rm&ioD: 2 ..,4Oof41 • 4 DIe . ,-",-forl\aJiD« IC';LD . .?OIO .:,Md_(if_cD} #/I~ :.~ 'I w.,.~~tr.;&fl~W~:;;~~.~(~~ ..... ~ QeD !Co"li~ r~;"" ~.sw..M~n;~l (,ro~!,¥t,+~._ ... ~.~II!~j"i . ',,--:): . ..... 7.0 1.0 .~ : .. 0..,,">' ..... -.: ••• ( ~ . • l1, ~~' ' ~ .. ":,,_;, .1 .... , 0IIr-~---".--• ..... ,~I" • ..otA,.J.. • ........ pH . ; :.'. ;:;r.-.---- -rfM'~. __ ' ______ _ ~~"'CJ ~~~~Wh"""!,,: ~. ~ .,. j ' -t? --- ~ ... ~ .. ~.: f~!:.-............. --. "QI~,---~---\ .. pH ________ ~~e -F --____ -- T~~':~--~------__ _ .'.~ I • .. " .... " :.(Bb),_. ____ _ T-'" . ~ ',' . ~ OJ ...... • .... a4r ..... , . .. -~ 1Jid.qelc:ra* (bal ....... .... llDee: 1I.11.D6 Bmrioa: J ~Aaw"'''''(QAP) ~~====~-~-­.;..w.Uili:d..... ..::::=========-_ .UI.,.....'~ . V __ ~W~~·-----------~,,~~A/~.~U~~------- ';9 :~~"i R • ..-, ... ii · " • -~,. '!". ; , '! .... .' . / .... ,: ••• ,c', " -. " " .~.. . ..... TabC2 Field Data Worksheets Accelerated Monitoring December 2010 Mill-Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) :OENISOJ)~J I ATTACHMENT 1 Attachment I WHITE MESA URANIUM MILL J See instruction : MIN~S FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: I D~c.~Mbc.r fl'\o",fhJ'd Z:;:;oUfla WQ\.+GI Location (well name): .... 1 _M_W_-_I_l ________ --' Sampler Name and initials: 1-l~(lIIc.r H()Il;J,,'a ITH Date and Time for Purgin~ )"'/JS/.:zo fD and Sampling (if different) L-J\l._? RJ ______ .--I Well Purging Equip Used: [![]pump o@ bailer Sampling Event ID~u:rYlbcr Mo(ifJiJ:a pH Buffer 7.0 7.D Specific Conductance 1 100C I~MHOS/cm Depth to Water Before PUl'gin~ ~"o D7 Conductance (avg) Well Pump (if other than Bennet) L--Q....,;...."S_D ____ ---' ! JV\vJ-30 Prevo Well Sampled in Sampling Event L _______ --I pH Buffer 4.0 q.o Well Depth(O.Olft): Casing Volume (V) 4" well:! ::210. 7~ !(.653h) 3" Well:. 0 (.367h) pH of Water (avg) .... 1 _7_,_3--'1 _____ -' Well Water Temp. (avg) Redox Potential (Eh)L.,.1 ..:....1"-=[3=---_---' TurbidityL-I_O __ -, Weather Condo Ext'l Amb. Temp .• ( (prior sampling event)l 3°(. Time Il~~ I Gal. Purged I 55.~ I Time I 1?-3t I Gal. Purged I .55 . .5.5 I Conductance I :l.~lg I pH I "CiS I Conductance I ~Z;;)3 I pH I "7·3g I Temp.oC I li,.3't I Temp.oC 1,4 .35 I Redox Potential Eh (m V) I ~~ I Redox Potential Eh (mV) I PoJ3 I Turbidity (NTU) I 0 I Turbidity (NTU) I u I Time 11X3I I Gal. Purged I 55 .7(" I Time 1)~3lS I Gal. Purged I S 5· ql I Conductance 1 :l.."?"'J I pH I 7.37 I Conductance I .2.t:j.;2..q I pH 1737 I Temp.oC 1 F1. '31 I Temp.oC IIQ·38 I Redox Potential Eh (m V) I Iq~ I Redox Potential Eh (mV) 1'&'5 1 Turbidity (NTU) 1 b I Turbidity (NTU) 1 (5 I White Mesa Mill Field Data Worksheet for Groundwater 1 of2 Mill-Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) Volume of Water Purged I .s c,. '-i 'J. Pumping Rate Calculation Flow Rate (Q) in gpm. S/60 = I .,.\1 gallon(s) Time to evacuate two casing volumes (2V) T=2V/Q= I ~Y".'33 I Number of casing volumes evacuated (if other than two) () Ifwell evacuated to dryness, number of gallons evacuated o Name of Certified Analytical Laboratory if Other Than Energy Lab~A\JA 1.. l!>d o,\'"oc..> Sample Taken Sample Vol (indicate Filtered Preservative Preservative Type of Sample if other than as Added y N specified below) y N Type y VOCs E 0 3x40 ml 0 ~ HCL -i:J Nutrients 0 0 100 ml 0 0 H2SO4 0 Heavy Metals 'eJ 0 250 m] E 0 HN03 19 All Other Non Radiologies 0 0 250 ml 0 0 No Preserv. 0 Gross Alpha 0 0 1,000 ml 0 0 HN03 0 Other (specify) 0 0 Sample volume 0 0 0 Ifpreservative is used, specify Type and Quantity of Preservative: Comment [~".i! See instruction Arr;\Ju).. Dr', !a",t! ():..+ Ogle.. ""O\nn(r"a..YI~ G-~(r :(1 pl"G.St:II1-.f6r pv.r~c Ci.ruA .stA.tvlf);h~ -elJeI'17 . Plkr~c:. b-e~~ ",t og~D . .pl.4r~t~ Well fbI" " 11)~,,1 of' 2.'"0 M"t1IA}<:~' vJa..-tC'( \AJGI..) dctA.,-+h(O~hOJ-f.u.1"~'C . Pv.r~'C.. ey'\tJ.~~ o.nJ SClMfl-t-5. IJ-Cr"e GoJlec.t-I:'t/ ,,+ 1:2.1.\0. D<..pt~ +() Qo..t-<r-",Acr-p\llf~< IN"~ ~q .3D L-GJ1 b ;t~ ~t l;l.'-\S . L..-_______ --JIDO not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater N 0 0 0 0 0 0 2of2 MiII-Groundwater Discharge Permit Groundwater Monitoring Quality Assurance Plan (QAP) I OENISOJ)~~ ATTACHMENT 1 WHITE MESA URANIUM MILL Date: 03/22/2010 Rev. 6 Attachment 1 Cd See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: 1 O~c.(.l"'bu MonH'I'} G-;().Mo. W",-re r Location (well name):L-1 _M_W_-_1Y _________ --' Sampler Name and initials: I~"(lu ~olliG\" ~ lilt Date and Time for Purgingj 1~/I.s/~o \l) and Sampling (if different) ,..v/J.t L--~~ _______ ~ Well Purging Equip Used: 00 pump or@] bailer Well Pump (if other than Bennet) Il-Q_~_D ____ -, Sampling Event 1 MO~~\1 &roUo"J \.\)J"-c.r Prevo Well Sampled in Sampling Event L-I_M_W_-_l_l ____ -' pH Buffer 7.0 7·() Specific Conductance 1-1 __ '_0 o_O __ --'I IlMHOS/ cm Depth to Water Before Purgin~ lD3.SD Conductance (avg) pH Buffer 4.0 Well Depth(O.Olft): lA~.7 '--------1 Casing Volume (V) pH of Water (avg) 4" well:l l~. '-\5 1(·653h) 3" Well:L-. _o __ --I.(.367h) Well Water Temp. (avg) 1 ll.\. )L\ Redox Potential (Eh)1 3?-..Co Turbidityl-l _O __ ----J Weather Condo Ext'l Amb. Temp. °C (prior sampling event) I 3 0 (. Time 11100 I Ga1. Purged I ~J...55 I Time I II cd I Gal. Purged 1 :3d-..7b I Conductance I 3.liJ.5 I pHI Co.y5 I Conductance I 31l!'?"b I pHI 3 I ~.'1Z) Temp.oC IIL{·LS I Temp.oC I Iq·ls I Redox Potential Eh (mV) I 3?.7 I Redox Potential Eh (m V) I ~ 7 I Turbidity (NTU) I 0 I Turbidity (NTU) I 0 I Time I /IOQ.-I Gal. Purged I ~?..g)( I Time 111 D3 I Gal. Purged I 3~'hO I Conductance I 3~?-5 I pH I {;·ctC; I Conductance I ->,.;z.b I pHI b·t:J7 I Temp.oC I Flo 19 I Temp.oC I Iq .1Q I Redox Potential Eh (mV) I 3:1.5 I Redox Potential Eh (m V) I 3:z5 I Turbidity (NTU) I 0 I Turbidity (NTU) 1 0 I White Mesa Mill Field Data Worksheet for Groundwater 1 of 2 Mill -Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) Volume of Water Purged 1 33. '3 gallon(s) Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = 1 • d-J7 Time to evacuate two casing volumes (2V) T = 2V /Q = 1 16)1. be;: 1 Number of casing volumes evacuated (if other than two) L-I _0 ___ --' If well evacuated to dryness, number of gallons evacuated L-I _D ___ --' Name of Certified Analytical Laboratory if Other Than Energy Lab~L-_/II._,/_A ______ ----, Sample Taken Sample Vol (indicate Filtered Preservative Preservative Type of Sample if other than as Added y N specified below) y N Type y VOCs 0 0 3x40 ml 0 0 HCL 0 Nutrients 0 0 100 m! 0 0 H2SO4 0 Heavy Metals 0 0 250 ml 0 0 HN03 0 All Other Non Radiologics 0 0 250 ml 0 0 No Preserv. 0 Gross Alpha 0 0 1,000 m! 0 0 HN03 0 Other (specifY) m 0 Sample volume 0 ~ 0 ./,,1 ::~J'" If preservative is used, specify Type and Quantity of PH Preservati ve: See instruction Comment A1"'riv~ 0(\ ~It-,-o...t o~~. ""-"''''lIU ().tI~ C:r(}o.r(":" p ... <.~en1 .\-t..-f'\N"~-'::" O'(I~ ~Go.l"1pl:\j ~vc,.rt, P""~t.. b~"~ ,J. ofs3,o.. 'Pu. .. ~c~ well .fc.r "-to·h.1 ot 1.55 ~:nvJ-~~. w~ter W6-J c.lclAr }hr()u.~ho v...1' r\A.(~ c. r' v..f'q ~ entle ~ tArt A .5'i:rr1 r )cU.j\Cf<..} ~ol/t:'(+ctI. o..t liDS. O-cp1h -to \J:)l1I..hr ~~cr pv.('~1:. (j \.OtA~ lO'-!.oo L SI"C t1:t llC>7 . L..-_______ --IIDO not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater N 0 0 0 0 0 I!l 2 of2 Mill -Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) OENISOJ)~~: ATTACHMENT 1 Attachment 1 WHITE MESA URANIUM MILL r-J I.:.~ See instruction MINtS FIELD DATA WORKSHEET FOR GROUND WATER _ •• ____ . ___ • __ ~ __ ~,. ___ ., _ •. _,, ____ J Description of Sampling Event: I Dec.e.t'lbe(' MDf1t"l~ GrOu."a G:bOt~r Location (well name):Il-_M_\N_-_:;J..._b ________ -----I Sampler Name and initials: 1~l'\n(,'" HDI/.JA~/iH Date and Time for Purgin~ 1.:lJ LS /~oID and Sampling (if different) III/A L--__________ ~ Well Purging Equip Used:@]pump o@ bailer Sampling Event ,Oe,_crV\hd f'A\on}h I~ pH Buffer 7.0 7.0 Specific Conductance ,-I __ ,_oo_b __ --'IIlMHOSI cm Depth to Water Before Purgin~ 7Q. 0,3 Conductance (avg) Well Pump (if other than Bennet) I MW"'lY Prevo Well Sampled in Sampling Event L--________ ~ pH Buffer 4.0 Well Depth(O.Olft): Casing Volume (V) pH of Water (avg) 4" well:~_O __ -II(.653h) 3" Well:. C . (.367h) Well Water Temp. (avg) 1 14.\(;( Redox Potential (Eh)IL--.~_~_!i_----, Turbid ity ,-I _O~_--, Weather Condo Ext" Amb. Temp. DC (prior sampling event)' 3°(' Time , \1~8 I Gal. Purged 1 I Time , I Gal. Purged 1 I Conductance I 3?--~,7 I pH , ~. LJS 1 Conductance I I pHI I Temp. DC I \q .~~ I Temp. DC I I Redox Potential Eh (m V) I 3~q I Redox Potential Eh (mV) I I Turbidity (NTU) I () I Turbidity (NTU) L I Time I I Gal. Purged I I Time I I Gal. Purged I I Conductance I I pHI I Conductance I I pHI I Temp. DC I I Temp. DC I I Redox Potential Eh (m V) I I Redox Potential Eh (m V) I I Turbidity (NTU) I I Turbidity (NTU) I I White Mesa Mill Field Data Worksheet for Groundwater 1 of2 Mill-Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) Volume of Water Purged L-1 __ ..v.:_z_'I">l __ ---I Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = ,--I _5_._1-\ __ --' gallon(s) Time to evacuate two casing volumes (2V) T = 2V/Q = 1 .A//A 1 Number of casing volumes evacuated (if other than two) 0 '-------' Ifwell evacuated to dryness, number of gallons evacuated D '-------' N arne of Certified Analytical Laboratory if Other Than Energy LablL-_N._'I_A.:..-_____ --' Sample Taken Sample Vol (indicate Filtered Preservative Preservative Type of Sample if other than as Added y N specified below) y N Type y N VOCs tlI 0 3x40 ml 0 ~ HCL rn 0 Nutrients ~ 0 100 ml 0 'f3 H2SO4 ~ 0 Heavy Metals ~ 0 250 ml B 0 HN03 ~ 0 All Other Non Radiologics 0 0 250 ml 0 0 No Preserv. 0 0 Gross Alpha 0 0 1,000 ml 0 0 HN03 0 0 Other (specify) ~ 0 Sample volume 0 ~ 0 e9 Gh 101';6(. If preservative is used, specifY Type and Quantity of PH Preservative: See instruction Comment AH:\Jc.Q.. on ~;lc. cd II) 7. -r~I\f\c:r (A(ld-c;.1lI.((~i\ l',-c~z:ni h,,. ~lAfVlpl:CJ e\)~nt. TooK D~ptJ,. -b ~1c(' 7~.0'3. Took , S<::+ of' rQ.(,~M~tc(S . S(J.l'V\p\c.~ \,!>c(c. p",llt:cA 0..1 113c). vJo.~c( ~00 c..\!(A,1. Len s;+<-",r 11'37 ,--_______ ---,1 Do not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater 2 of2 Mill -Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) OEN,SOJ)ii j ATTACHMENT 1 Attachment 1 l~ See instruction WHITE MESA URANIUM MILL MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: I pe.c.ernCx.r Pi Oflth I ~ GrOVl\O\Wo...t<.r Location (well name ):I ..... __ M_W_-_.3_0 ________ --' Sampler Name and initials: 11oJ1nu J'1o]l.J,,'t\ J-rB Date and Time for Purgin~ )~ I g / aDI D and Sampling (if different) NIA L...-_______ --' Well Purging Equip Used:~pump o@ bailer Well Pump (if other than Bennet) L...I Q_~_"'_D ____ --, Sampling Event I D~'G~bV M o()#\l 'l I ~w-31 Prevo Well Sampled in Sampling Event L... _______ ----J pH Buffer 7.0 pH Buffer 4.0 1...\.0 Specific ConductanceL...I_IO_O_O ___ -II/lMHOS/ cm Well Depth(O.Olft): 110.00 Depth to Water Before PurgingJ 7'0.73 Casing Volume (V) 4" well:1 ?-.1.7;t. 1(·653h) 3" Well: D (.367h) '-------' Conductance (avg) ;)..,077 pH of Water (avg) Well Water Temp. (avg) I I q .;25 Redox Potential (Eh)1-1 ~_'-\_\_..--I Turbidityl'----O __ .--J Weather Condo Ext'l Amb. Temp. DC (prior sampling event)1 Y 0(. Time I 1;2.;2.0 I Gal. Purged I 9 9 .cH~ I Time I l~J I Gal. Purged I YY,7b I Conductance I ()...O71 I pHI ?~~tS I Conductance I :;"075 I pH I b.b) I b-5~ Temp. DC I 1=\.1I: I Temp. DC I 14.~ I Redox Potential Eh (m V) I 3'-\S I Redox Potential Eh (mV) I -::>Y;2." I Turbidity (NTU) I 0 I Turbidity (NTU) I 0 I Time I I~ I Gal. Purged I 114·91 I Time I l26~ I Gal. Purged I "\.5, J:3 I Conductance I ';)...077 I pHI b.Co1f I Conductance I ~D/~ I pHI b,{.5 I Temp. DC I J4.:10 I Temp. DC 114·& I Redox Potential Eh (mV) I 5Y1 I Redox Potential Eh (mV) I '5.37 I Turbidity (NTU) I b I Turbidity (NTU) I 0 I White Mesa Mill Field Data Worksheet for Groundwater 1 of2 Mill -Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) Volume of Water Purged I '1 S . s 1 gallon(s) Pumping Rate Calculation Flow Rate (Q), i-n gpm . Time to evacuate two casing volumes (2V) S/60 = I · ;J..l/ T=2V/Q= I ~O().~ I Number of casing volumes evacuated (if other than two) If well evacuated to dryness, number of gallons evacuated o Name of Certified Analytical Laboratory if Other Than Energy Lab~L.._,v._:t..:....f.\ ______ ---, Sample Taken Sample Vol (indicate Filtered Preservative Preservative Type of Sample if other than as y N specified below) VOCs 0 0 3x40 ml Nutrients ~ 0 100 m) Heavy Metals 111 0 250 ml All Other Non Radiologics 0 0 250 ml Gross Alpha 0 0 1,000 m) Other (specify) 0 0 Sample volume Comment y N 0 0 0 [3 ~ 0 0 0 0 0 0 0 Added Type y HCL 0 H2SO4 ~ HN03 III No Preserv. 0 HN03 0 0 Ifpreservative is used, specifY Type and Quantity of Preservative: i, .. ' See instruction ~ Arr;-vd. on £.:t<. 0.1 08'.51, ~nJ\cl' f1o.f1J. G--,.rr:" ff'dcnt for flAr~c ".no\ ~~r1lfl;~ -G\)c"t P \.lf~{ b ~~I\ 6"t 0 &s.5. f v.r~t:tA \,.)c:1I ~6 r "-+ oi #"1 J' .;2. ) 0 fA j (J lAt~ , \,0o..·h:r I,.)CA.S Ll-co.'-.J-J,ro~out-fv-r~~ ... flArVc:. ~ndcJ. q"d .sC(Mpl~ lAJu<. L.ollc.c.tcA 0.+ lM54 L~ s;h-fA..t JXLq. P'Gp1~ ",Bc.r pu~~ L0~ 78.85 L--_______ ----JIDO not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater N 0 0 0 0 0 0 2 of 2 Mill -Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) ;OENISOJ)~~: ATTACHMENT 1 Attachment 1 [~ See instruction WHITE MESA URANIUM MILL MINES FIELD DATA WORKSHEET FOR GROUND WATER -----_.,. __ .--~ -~---~.' Description of Sampling Event: I D-e.GOYI.bcr MOllfhl'6 &rou.n{}lwo..tu- Location (well name):I-I..;...M_W_-_'3--.!....I ________ --' Sampler Name and initials: I ~I'\n(.(" No Il;J"'A !,I-l Date and Time for Purgin~ 1~/14/a-oID and Sampling (if different) .!V/A ~--~------~ Well Purging Equip Used: [!!]pump or@] bailer Sampling Event ID~GC.MbGl'''' MOflHl'1 pH Buffer 7.0 /.0 Specific Conductance I 1000 IflMHOSI cm Depth to Water Before Purgingj bg.q I Conductance (avg) Well Pump (if other than Bennet) Prevo Well Sampled in Sampling Event I-I_Al_/A ______ ...... pH Buffer 4.0 Lj.o Well Depth(O.Olft): 13D.OD Casing Volume (V) pH of Water (avg) 4" w ell:1 ~4· ~q 1(·653h) 3" Wei 1:1-. _O __ -I.(.367h) Well Water Temp. (avg) Redox Potential eEh)1 ~ 7 Turbidityl'--o __ --J Weather Condo Ext'l Amb. Temp. ·C (prior sampling event}1 :3 0.(. Time 114?,S I Gal. Purged I 7'1 -j]) I Time I J 9..2.k. I Gal. Purged 17'1. Y;z.. I Conductance I n9.3 I pH I b·'18 I Conductance I 17'1;2.. I pH I b.Cf7 I Temp.oC I ly.qO I Temp.oC 114·3G I Redox Potential Eh (m V) I ~7 I Redox Potential Eh (mV) I 3')..7 I Turbidity (NTU) I 0 I Turbidity (NTU) I 0 I Time I IY;).i I Gal. Purged I 7~.b3 I Time 119~~ I Gal. Purged I 721. €5 I Conductance I 17q; I pH I (;.q 7 I Conductance I I 7li5 I pH I (;.ct5 I Temp.oC I Iq .35> I Temp.oC I 1~:~9 I Redox Potential Eh (mV) I 3'J..Z I Redox Potential Eh (mV) I 3',.1.7 I Turbidity (NTU) I 0 I Turbidity (NTU) I D I White Mesa Mill Field Data Worksheet for Groundwater 1 of2 MiII-Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) Volume of Water Purged I gO . ..:2.1 Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = I . ;2.J7 gallon(s) Time to evacuate two casing volumes (2V) T=2V/Q= I 3b7.bb I Number of casing volumes evacuated (if other than two) o If well evacuated to dryness, number of gallons evacuated o Name of Certified Analytical Laboratory if Other Than Energy LablL-__ Itl._:l._A _____ ---' Sample Taken Sample Vol (indicate Filtered Preservative Preservative Type of Sample if other than as Added y N specified below) Y N Type y VOCs D 0 3x40 ml D 0 HCL 0 Nutrients E 0 100 ml D 1B H2SO4 'If] Heavy Metals 0 0 250 ml D 0 RN03 0 All Other Non Radiologies 0 0 250 ml 0 0 No Preserv. 0 Gross Alpha D D 1,000 ml 0 0 RN03 0 Other (specify) D 0 Sample volume 0 D 0 If preservative is used, specifY Comment Type and Quantity of Preservative: r--:' .. "~oS. See instruction U£: Arr;'IJ(!~ on ~;te ",t O~16. "'-OoY\TIU (/..n~ &fAf';(\ fr~~U\}-for ?V.('~c /Afld.. SAMfl:"j <ven1-. P""r~{. b l.~~r-., ,,+ 08~O. f ....... r~~c\ Well ror ~ t-ot&1J 0-\ 370 tvt:,.. v.te~. WGI,+tr I.o.)tt~ G\CCA.r +-h("ou~ov} p\..\r~(.. r\"\r~~ entetl. (A.ntA .sQ rYlp/c. l>:)C(<:. (.ollc=::c.+-c~ ~t J'130. Ocr~\... J-o v:>d-u ~·fhr pu.r~c.. v.)<&~ 7,;{.?,.D. L<ft S/fc:. ~}-Jt..j33. '--________ -'IDo not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater N D 0 0 0 0 0 2of2 Mill -Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) ATTACHMENT 1 : ()E NISO,})~ ~! WHITE MESA URANIUM MILL Attachment 1 [~ See instruction MIN~S FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: , Deu.Mbe.r MOYTtn I~ GTD\AYldl WcJt.f' Location (well name):L-' _M_vJ_-_&S _________ -' Sampler Name and initials: ,::::r ;:nr~"" A 0 II. JOI 'j /1}t Date and Time for Purgin~ \:;LI}S/ a-OID and Sampling (if different) 1'1',4-~-~------' Well Purging Equip Used: [][]pump o@ bailer Well Pump (if other than Bennet) I C:ofl+inV\O\A~ I Mw-I'-\ Sampling Event I P~"c.YI'lh<.-(" MoY\tbl y Prevo Well Sampled in Sampling Event L.. _______ ---' pH Buffer 7.0 7,0 pH Buffer 4.0 1.-1·0 Specific ConductanceL-' _..:..\O_o-..;6=---_---II IlMHOS/ cm Well Depth(O.Olft): ttl. '&) Depth to Water Before Purgin~ 7Q.03 Conductance (avg) Well Water Temp. (avg) , 'Ll. ~2 Weather Condo Time , 11 ~f6 I Gal. Purged I Conductance I '3~g:J I pHI Temp.oC I t-\.g~ I Redox Potential Eh (mV) I 3'J..'j I Turbidity (NTU) I 0 I Time I I Gal. Purged I Conductance I I pH I Temp.oC I I Redox Potential Eh (mV) I I Turbidity (NTU) I I White Mesa Mill Field Data Worksheet for Groundwater Casing Volume (V) pH of Water (avg) 4" well:It--_D __ -iI(.653h) 3" Well:. 0 .(.367h) Redox Potential (Eh)1 3?Y TurbidityL-1 _0-'--_--' Ext'l Amb. Temp. DC (prior sampling eventll 3" (, I Time I I Gal. Purged I I b,I..\.!j I Conductance I I pHI I Temp.oC I I Redox Potential Eh (mV) I I Turbidity (NTU) I I I Time I I Gal. Purged I I I Conductance I I pHI I Temp.oC I I Redox Potential Eh (mV) I I Turbidity (NTU) I I 1 of 2 Mill-Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) Volume of Water Purged !'--'-Po,;"",'/A:....:...-__ --' gallon(s) Pumping Rate Calculation Flow Rate (Q), in gpm. Time to evacuate two casing volumes (2V) S/60 = ! S .l..\ T=2V/Q=! em ! Number of casing volumes evacuated (if other than two) 0 L.....-___ ---' If well evacuated to dryness, number of gallons evacuated 1L.._Cl ___ ---' N arne of Certified Analytical Laboratory if Other Than Energy Lab~,-_.,v:_z...;.'A _______ .....I Sample Taken Sample Vol (indicate Filtered Preservative Preservative Type of Sample if other than as Added y N specified below) Y N Type y N VOCs B 0 3x40 ml 0 lSi HCL ~ 0 Nutrients 1]') 0 100 ml 0 ~ H2SO4 ~ 0 Heavy Metals L) 0 250 ml ~ 0 HN03 ~ 0 All Other Non Radiologics 0 0 250 ml 0 0 No Preserv. 0 0 Gross Alpha 0 0 1,000 ml 0 0 HN03 0 0 Other (specify) B 0 Sample volume 0 t8 0 JgJ C-\, \or'l Je If preservative is used, specify Type and Quantity of Pl1 Preservative: Comment ~ See instruction L...-_______ --I!Do not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater 2of2 TabD Quarter! y Depth to Water Quarterly Depth to Water NAME: Tanner Holliday, Garrin Palmer Start time: 750 DATE: 12/21/2010 Finish Time: 1240 TIME WELL 1.0. DEPTH TIME WELL 1.0. DEPTH TIME WELL 1.0. DEPTH 921 MW-l 65.20 1008 TW4-1 63.92 837 PIEZ-l 61.76 1203 MW-2 109.90 1010 TW4-2 67.72 832 PIEZ-2 16.88 942 MW-3 83.30 1022 TW4-3 49.37 828 PIEZ-3 45.00 943 MW-3A 85.25 1007 TW4-4 79.83 1001 PIEZ-4 48.90 1009 MW-4 71.32 1019 TW4-5 56.53 959 PIEZ-5 43.69 1220 MW-5 106.02 1006 TW4-6 70.74 1224 MW-ll 89.20 1009 TW4-7 67.67 805 TWN-l 49.17 1216 MW-12 108.53 1011 TW4-8 67.31 750 TWN-2 16.45 1231 MW-14 103.90 1021 TW4-9 54.51 810 TWN-3 31.15 1234 MW-15 106.59 1018 TW4-10 56.96 824 TWN-4 37.45 939 MW-17 75.99 1013 TW4-11 58.00 914 TWN-5 69.76 910 MW-18 70.33 933 TW4-12 39.14 905 TWN-6 74.45 835 MW-19 50.82 932 TW4-13 46.80 917 TWN-7 90.26 946 MW-20 83.27 930 TW4-14 88.15 907 TWN-8 61.51 951 MW-22 67.20 1024 TW4-15 81.31 839 TWN-9 63.88 1206 MW-23 115.02 1015 TW4-16 65.37 902 TWN-I0 81.30 1142 MW-24 114.63 1016 TW4-17 76.27 855 TWN-ll 69.44 1227 MW-25 74.73 800 TW4-18 36.99 853 TWN-12 34.81 1024 MW-26 81.31 1049 TW4-19 62.99 842 TWN-13 46.55 1138 MW-27 50.93 1026 TW4-20 68.18 845 TWN-14 62.73 1147 MW-28 77.28 758 TW4-21 58.21 900 TWN-15 92.19 1159 MW-29 102.45 1027 TW4-22 54.56 850 TWN-16 48.31 1156 MW-30 76.80 1005 TW4-23 65.83 847 TWN-17 34.40 1152 MW-31 68.95 1028 TW4-24 55.97 820 TWN-18 37 .79 1016 MW-32 76.27 755 TW4-25 46.25 1039 TWN-19 52.95 1212 MW-33 Dry 1103 TW4-26 64.51 1239 MW-34 108.05 1208 MW-35 112.39 Comments: TabE Laboratory Analytical Reports -Quarterly Sampling A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter -Semiannual Groundwater 1011452-001A Client Sample ID: MW-1 Collection Date: 11/18/2010 1515h Received Date: Method Used: 11123/20101025h SW8260C Contact: Jo Ann Tischler Analyzed: 1112412010 1638h Analytical Results VOAs by GC/MS Method 8260CI5030C Units: Ilg/L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 10.7 77-144 105 80-123 105 80-124 101 80-125 98.7 Report Date: 11/29/2010 Page 4 of27 AU analyses applicable to the CWA, SDWA. and RCRA are perfonned in accordance to NELAC protocols. Pertinent sampling information is located on the attached COCo This report is provided for the exclusive use of the addressee. Privileges of subsequent use of the name of this company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or sale orany product or process, or in connection with the re-publication of this report for any purpose other than for the addressee will be granted only on contact. This company accepts no responsibility except for the due perfonnance of inspection and/or analysis in good faith and according to the rules of the trade and of science. EN:RGY I\H,n; .. \/·;fJI " www.energylab.com AuIyIIaI£ruI1fte,stnu rm Helena, MT 871-472-0111 • Billings, MT 800-135-4489 • Casper, WY 888-235-0515 Gillette, WV 888-886-7115 • Rapid City, SI) 888-672-1225 • Collage station, 1X 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 LablD: C1 011 0844-001 Client Sample ID: MW1 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS -DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLIDES -DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. Result ND 303 175 15 0.29 61.6 0.12 ND 6.8 169 792 7.98 1350 ND ND ND ND ND ND 324 ND 275 ND ND ND ND ND ND ND 0.33 ND ND 0.7 0.6 0.8 Units mgll mgll mg/l mg/l mg/l mgll mgll mg/l mgll mgll mg/l S.u. mg/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l ugll ugll ug/l ug/l ug/l pCi/l pCi/l pC ill MDC - Minimum detectable concentration U -Not detected at minimum detectable concentration Report Date: 01/06/11 Collection Date: 11/18/1015:15 DateReceived: 11/23/10 Matrix: Aqueous MCll Qualifiers Rl QCl Method Analysis Date 1 By D D U A2320 B 11/23/10 19:151 jba A2320 B 11/23/1019:151 jba 0.5 E200.7 12116/1015:51/cp 1 A4500-CI B 12115/10 15:071 Imc 0.10 A4500-F C 12101/10 09:521 jba 0.5 E200.7 12116/1015:511 cp 0.05 A4500-NH3 G 11/29/1013:091 dc 0.1 E353.2 11/24/1013:241 dc 0.5 E200.7 12116/10 15 :51 1 cp 0.6 E200.7 12116/1015:511 cp 20 A4500-S04 E 11/30/1 0 12:08 1 Ir 0.01 A4500-H B 11/23/10 16:18/1r 10 A2540 C 11/23/10 16:45 /lr 5.0 E200.8 12122110 11 :44 1 sml 0.50 E200.8 12122110 11 :44 1 sml 0.50 E200.8 12122110 11 :44 1 sml 25 E200.8 12122110 11 :44 1 sml 10 E200.8 12122110 11 :44 1 sml 10 E200.8 12122110 11 :44 1 sml 30 E200.7 12116/1015:511 cp 1.0 E200.8 12122110 11 :44 1 sml 10 E200.8 12122110 11 :44 1 sml 0.50 E200.8 12123/10 07:591 sml 10 E200.8 12122110 11 :44 1 sml 20 E200.8 12122110 11 :44 1 sml 5.0 E200.8 12122110 11 :44 1 sml 10 E200.8 12122110 11 :44 1 sml 0.50 E200.8 12122110 11 :44 1 sml 100 E200.8 12122110 11 :44 1 sml 0.30 E200.8 12122110 11 :44 1 sml 15 E200.8 1212211 0 11 :44 1 sml 10 E200.8 1212211 0 11 :44 1 sml E900.1 12102110 12:451 ep E900.1 12102110 12:451 ep E900.1 12102110 12:451 ep MCl -Maximum contaminant level. ND -Not detected at the reporting limit. D -Rl increased due to sample matrix. Page 3 of 36 EN:RGY , I\qtJf.,,\r ---1./'1 .~ www.energylab.com Au/fIIaI ExuIIIta Sb!u 1m Helena, PIT 111-472-0111 • Billings, MT 800-735-4489 . Casper, WY 111-235-0515 Gillette, WY 111-68&-7175 • Rapid City, SD 118-872-1225 • CoUege Station, 1X 111-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp Semi-Annual Groundwater 2010 C1 011 0844-001 Client Sample 10: MW 1 Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1 ,2-0ichlorobenzene-d4 Surr: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. Result -1.27 21.9 21.3 1380 0.980 NO ND ND ND NO NO NO NO NO NO 103 101 98.0 103 Units % meq/L meq/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L %REC %REC %REC %REC Qualifiers Rl 20 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 80-120 70-130 80-120 80-120 Report Date: 01/06/11 Collection Date: 11/18/1015:15 DateRecelved: 11/23/10 Matrix: Aqueous MCU QCl Method Analysis Date 1 By Calculation 12123/1007:141 kbh Calculation 12123/1007:141 kbh Calculation 12123/1007:141 kbh Calculation 12123/10 07:141 kbh Calculation 12123/10 07:141 kbh SW8260B 12101/10 15:261 ilr SW8260B 12101/10 15:26 I ilr SW8260B 12101/10 15:26 I ilr SW8260B 12101110 15:26 1 ilr SW8260B 12101/10 15:261 ilr SW8260B 12101/1015:261 ilr SW8260B 12101/10 15:26 I ilr SW8260B 12101/10 15:26 I ilr SW8260B 12101/10 15:26 I ilr SW8260B 12101110 15:26 I ilr SW8260B 12101/10 15:261 ilr SWB260B 12101/1015:261 ilr SW8260B 12101/1015:261 ilr SW8260B 12101/1015:261 ilr MCl -Maximum contaminant level. NO -Not detected at the reporting limit. Page 4 of 36 A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, VT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter-Semiannual Groundwater 1011399-007A Client Sample ID: MW-2 Collection Date: 1111712010 1000h Received Date: 1111912010 1030h Method Used: SW8260C Contact: Jo Ann Tischler Analyzed: 11/22/2010 1116h Analytical Results VOAs by GCIMS Method 8260C/S030C Units: ~gIL Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 122 80-123 lOS 80-124 lOS 80-125 95.6 Report Date: 11123/2010 Page 10 of25 All analyses applicable to the CWA, SDWA, and RCRA are performed in accordance La NELAC protocols. Pertinent sampling information is located on the attached COCo This report is provided for the exclusive usc of the addressee. Privileges of subsequent use of the name of this company or any member of Hs stafT, or reproduction of this report in connection with the advertisement, promotion or sale orany product or process, or in connection with the re·publication of this report. for any purpose other than for the addressee will be granted only on contact This company accepts no responsibility except for the due perfonnance of inspection andlor a.nalysis in good faith and according to the rules of the trade and of science. www.energylab.com AMIyI/QI EJuIIeGn ss.u 1J5t Helena, MT 877-412-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 Gillette, WY 866-188-7175 • Rapid City, SO 888-&72-1225 • College Station, TX 888-69D-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Lab ID: C 10110730-006 Client Sample ID: MW2 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS -DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLIDES -DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result ND 384 328 7 0.29 93.1 ND ND 10.5 503 2000 7.39 3140 ND ND ND ND ND ND ND ND ND ND ND ND 9.2 ND ND ND 10.2 ND ND 0.7 0.1 0.1 Units mg/l mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L s.u. mg/L ug/L ug/L ug/l ug/l ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L pCi/L pCi/L pCi/L MDC -Minimum detectable concentration Report Date: 12/30/10 Collection Date: 11/17/10 10:00 DateRecelved: 11/19/10 Matrix: Aqueous MCL! Qualifiers Rl QCl Method Analysis Date 1 By D D D A2320 B 11/19/1017:331 jba A2320 B 11/19/1017:331 jba E200.7 12/06/10 13:18/cp A4500-CI B 11/23/10 11 :27 Ilr 0.10 A4500-F C 11/22/10 11 :45 I jba 0.5 E200.7 12/06/1013:181 cp 0.05 A4500-NH3 G 11/29/1012:511 dc 0.1 E353.2 11/23/1013:221 dc 0.5 E200.7 12106/1013:181 cp 1 E200.7 12106/10 13:181 cp 50 A4500-S04 E 11/30/1012:0111r 0.01 A4500-H B 11/19/1016:12/1jl 10 A2540 C 11/19/1014:51/1jl 5.0 E200.8 11/30/10 04:331 sml 0.50 E200.B 11/30/10 04:331 sml 0.50 E200.B 11/30/1004:33/sml 25 E200.B 11/30/10 04:33 I sml 10 E200.8 11/30/10 04:331 sml 10 E200.B 11/30/10 04:33 I sml 30 E200.7 12/06/1013:181 cp 1.0 E200.8 11/30/1004:331 sml 10 E200.B 11/30/1004:331 sml 0.50 E200.8 11/30/1004:331 sml 10 E200.8 11/30/1004:331 sml 20 E200.B 11/30/1004:331 sml 5.0 E200.B 11/30/1004:331 sml 10 E200.B 11/30/10 04:33 I sml 0.50 E200.B 11/30/1004:331 sml 100 E200.B 11/30/1004:331 sml 0.30 E200.8 11/30/10 04:331 sml 15 E200.B 11/30/10 04:331 sml 10 E200.B 11/30/10 04:331 sml E900.1 02/23/11 05:25 I ep E900.1 02/23/11 05 :25 I ep E900.1 02/23/11 05 :25 I ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 13 of 34 EI\ERGY • J\ ,()f , ... I G:-,I '- www.energylab.com WIytItIIrxuo-.smc, 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 866-IS6-7175 • Rapid City, so 888-672-1225 • College Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/30/10 Collection Date: 11/17/10 10:00 DateReceived: 11/19/10 Matrix: Aqueous Client: Project: Lab 10: Denison Mines USA Corp Semi-Annual Groundwater 2010 C1 011 0730-006 Client Sample 10: MW2 Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (0. SO -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-dS Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result -2.14 4S.2 46.2 3150 1.00 ND ND ND NO ND ND ND ND ND ND 10S 109 94.0 101 MCLt Units Qualifiers Rl QCl Method Analysis Date 1 By % Calculation 12/16/10 07:091 kbh meq/L Calculation 12/16/10 07:09 1 kbh meq/L Calculation 12/16/10 07:091 kbh mg/L Calculation 12/16/10 07:09 1 kbh Calculation 12/16/10 07:09 1 kbh ug/L 20 SWB260B 11/24/1002:391 rmh ug/L 1.0 SWB260B 11/24/10 02:391 rmh ug/L 1.0 SWS260B 11/24/10 02:391 rmh ug/L 1.0 SWS260B 11/24/1002:39 1 rmh ug/L 1.0 SWS260B 11/24/1002:391 rmh ug/L 20 SW8260B 11/24/1002:391 rmh ug/L 1.0 SWS260B 11/24/1002:391 rmh ug/L 1.0 SWS260B 11/24/1002:391 rmh ug/L 1.0 SWS260B 11/24/1002:391 rmh ug/L 1.0 SWS260B 11/24/1002:391 rmh %REC BO-120 SWS260B 11/24/1002:391 rmh %REC 70-130 SWS260B 11/24/1002:391 rmh %REC SO-120 SWS260B 11/24/1002:391 rmh %REC BO-120 SW8260B 11/24/1002:391 rmh MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 14 of 34 A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email;awal@awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANAL YTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter -Semiannual Groundwater 1011452-002A Client Sample ID: MW-3 Collection Date: 11119/2010 0945h Received Date: Method Used: 11123/20101025h SW8260C Contact: Jo Ann Tischler Analyzed: 11/24/2010 1948h Analytical Results VOAs by GC/MS Method 8260CI5030C Units: 11g!L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 109 80-123 107 80-124 102 80-125 99.2 Report Date: 11/29/2010 Page 5 of27 All analyses applicable to Lhe CW A, SDWA, and ReRA are perfonned in accordance to NELAC protocols. Pertinent sampling information is located on the atLached COCo This report is provided for the exclusive use of the addressee. Privileges of subsequent use of the name of this company OT any member of its starr, or reproduction of this report in connection with the advertisement, promotion or sale araoy product or process, or in connection with the re-publication of this report for any purpose other than for the addressee will be granted only on contact. This company accepts no responsibiJity except for the due perfonnance of inspection andlor analysis in good raith and according to the rules of the trade and of science. EN:RGY l A y CH;j\ 1 '"'~~I '- www.energylab.com W/ytII:M~stm:. rm Helena, MT 817-472-0111 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 888-888-7175 • Rapid City, SD 888-672-1225 • College Station,1X 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Lab 10: C1 011 0844-002 Client Sample 10: MW3 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS -DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLIDES -DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result ND 234 468 63 0.77 248 0.11 0.4 24.8 780 3430 7.88 5020 ND ND 0.63 ND ND ND ND ND 143 ND ND ND 38.8 ND 1.34 ND 16.9 ND 40 0.4 0.6 O.B Units mglL mg/L mg/L mg/L mg/L mglL mglL mglL mglL mglL mg/L S.u. mg/L ugiL ug/L ugiL ug/L ug/L ug/L ug/L ugiL ugiL ugiL ug/L ug/L ug/L ug/L ug/L ugiL ug/L ug/L ug/L pCi/L pC ilL pCi/L MDC - Minimum detectable concentration U -Not detected at minimum detectable concentration Report Date: 01/06/11 Collection Date: 11/19/10 09:45 DateReceived: 11/23/10 Matrix: Aqueous MCU Qualifiers RL QCL Method Analysis Date 1 By D D D D U A2320 B 11/23/10 19:23 1 jba A2320 B 11/23/10 19:23 1 jba E200.7 12127/10 12:23/cp A4500-CI B 12115/10 15:08/1mc 0.10 A4500-F C 12101/10 09:551 jba 0.5 E200.7 12127/10 12:23/cp 0.05 A4500-NH3 G 11/29/1013:11/dc 0.1 E353.2 11/24/10 13:341 dc 0.5 E200.7 12127/10 12:231 cp 1 E200.7 12127/10 12:231 cp 50 A4500-S04 E 11/30/10 12:09/1r 0.01 A4500-H B 11/24/10 10:32 /lr 16 A2540 C 11/23/10 16:45 /lr 5.0 E200.8 12122110 11 :51 1 sml 0.50 E200.8 12123/1008:061 sml 0.50 E200.8 12123/1014:191 sml 25 E200.8 12122110 11 :51 1 sml 10 E200.8 12122110 11 :51 1 sml 10 E200.8 12123/10 08:06 1 sml 30 E200.7 12116/1015:591 cp 1.0 E200.8 12123/10 14:19/sml 10 E200.8 12123/10 08:061 sml 0.50 E200.8 12123/10 14:191 sml 10 E200.8 12123/10 14:19/sml 20 E200.8 12123/1008:061 sml 5.0 E200.8 12123/10 08:06 1 sml 10 E200.B 12123/1014:191 sml 0.50 E200.8 12123/10 14:191 sml 100 E200.8 12123/10 14:191 sml 0.30 E200.8 12123/10 14:19/sml 15 E200.8 12122110 11 :51 1 sml 10 E200.8 12123/1014:191 sml E900.1 12102110 12:451 ep E900.1 12102110 12:451 ep E900.1 12102110 12:451 ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 5 of 36 EI\ERGY ! !\:-{(lP/\I (;:"i !... www.energylab.com W/ffII:II EzAIIIIIo SIne. 1m Helen., MT 817·472·0711 • Billings, MT 800·735-4489 • Ca!per, WY 888-235·0515 Gillette, WV 88&-888·7175 • Rapid City, SD 888·872·1225 • College Station, 1X 888-890-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab ID: Denison Mines USA Corp Semi-Annual Groundwater 2010 C1 011 0844-002 Client Sample ID: MW3 Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result 0.710 77.2 78.3 5150 0.970 ND ND ND ND ND ND ND ND ND ND 96.0 102 95.0 96.0 Units % meq/L meq/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L %REC %REC %REC %REC Qualifiers RL 20 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 80-120 70-130 80-120 80-120 Report Date: 01/06/11 Collection Date: 11/19/1009:45 DateReceived: 11/23/10 Matrix: Aqueous MCU QCL Method Analysis Date 1 By Calculation 01/06/11 10:271 sdw Calculation 01/06/11 10:271 sdw Calculation 01/06/11 10:271 sdw Calculation 01/06/11 10:271 sdw Calculation 01/06/11 10:271 sdw SW8260B 12101/10 16:021 jlr SW8260B 12101/1016:021 jlr SW8260B 12101/10 16:021 jlr SW8260B 12101/1016:021 jlr SW8260B 12101/10 16:021 jlr SW8260B 12101/10 16:021 jlr SW8260B 12101/10 16:021 jlr SW8260B 12101/10 16:021 jlr SW8260B 12101/10 16:021 jlr SW8260B 12101/10 16:021 jlr SW8260B 12101/10 16:021 jlr SW8260B 12101/10 16:021 jlr SW8260B 12101/10 16:021 jlr SW8260B 12101/10 16:021 jlr MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 6 of 36 A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter Semi Annual Ground Water 1011479-001A Client Sample ID: MW-3A Collection Date: 11/22/2010 0940h Received Date: Method Used: 11124/2010 1040h SW8260C Contact: Jo Ann Tischler Analyzed: 11127/2010 2133h Analytical Results VOAs by GC/MS Method 8260CI5030C Units: IlgiL Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 111 80-123 108 80-124 104 80-125 99.5 Report Date: 121712010 Page4of21 All analyses applicable to the CWA, SDWA, and RCRA arc performed in accordance to NELAC protocols. Pertinent sampling information is located on the attached COCo This report is provided for the exclusive use of the addressee. Privileges of subsequent usc of the name of this company or any member of jts starf, or reproduction of this report in connection wilh lhe advertisement, promotion or sale of any product or process, or in connection wit.h the r:~public~tion .of Lh~s .report. for a~y purpose other than for the addressee will be granted only on contact. This company accepts no responsibility ~XCCpl for the due perfonnance of inspection and/or analysis in good faith EN:RGY I /. ~ ()I .• \ I '1.(1 ' WWN.energylab.com AMIytIaI~smc. ,m Halena, MT 877-472-0111 • Billings, MT 800-735-4489 • Casper, WY 881-235-0515 Gillette, WY 88~188-7175 • Rapid City, SD 888-672-1225 • College Station, TX 881-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 LablD: C1 011 0870-001 Client Sample ID: MW3A Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TOS @ 180 C METALS -DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Siiver Thallium Tin Uranium Vanadium Zinc RADIONUCLIDES -DISSOLVED Gross Alpha minus An & U Gross Alpha minus An & U Precision (±) Gross Alpha minus An & U MOC Report Definitions: AL -Analyte reporting limit. QCL -Quality control limit. Result ND 346 463 59 1.28 312 0.08 1.2 27.8 754 3850 7.97 5330 NO 0.73 1.82 NO NO NO ND ND 270 ND NO ND 94.8 ND 0.95 NO 19.2 NO 54 1.7 0.8 1.0 Units mglL mg/L mglL mglL mglL mglL mglL mg/L mglL mgll mglL S.u. mglL ug/L ug/L ugll ugll ugiL ugiL ugiL ugiL ugiL ugiL ugll ugiL ugiL ugiL ug/L ugiL ugiL ug/L ugiL pC ilL pC ilL pC ilL MDC -Minimum detectable concentration Report Date: 12/30/1 0 Collection Date: 11/22/1009:40 DateReceived: 11/24/10 Matrix: Aqueous MCL! Qualifiers Rl QCl Method Analysis Date 1 By 0 0 0 0 A2320 B A2320 B E200.7 1 A4500-CI B 0.10 A4500-F C 0.5 E200.7 0.05 A4500-NH3 G 0.1 E353.2 0.5 E200.7 1 E200.7 100 A4500-S04 E 0.01 A4500-H B 17 A2540 C 5.0 E200.8 0.50 E200.8 0.50 E200.8 25 E200.8 10 E200.8 10 E200.8 30 E200.7 1.0 E200.8 10 E200.8 0.50 E200.8 10 E200.8 20 E200.8 5.0 E200.8 10 E200.8 0.50 E200.8 100 E200.8 0.30 E200.8 15 E200.8 10 E200.8 E900.1 E900.1 E900.1 MCL -Maximum contaminant level. NO -Not detected at the reporting limit. o -RL increased due to sample matrix. 12101/10 17:131 jba 12101/1017:131 jba 12109/10 12:46/cp 12115/10 15:27/1mc 12101/1011 :091 jba 12109/10 12:461 cp 11/29/1013:531 dc 11/24/10 14:241 dc 12109/10 12:46 1 cp 12109/10 12:461 cp 11/30/10 12:25 IIr 11/24/10 14:38/1r 11/24/10 16:03 IIr 12117/1002:481 sml 12122110 12:53/sml 12117/10 02:481 sml 12117/1002:481 sml 12117/1002:481 sml 12122110 12:531 sml 12109/10 12:46 1 cp 12123/10 14:331 sml 12117/10 02:481 sml 12123/10 14:331 sml 12117/1002:481 sml 12117/10 02:481 sml 12117/10 02:481 sml 12117/1002:481 sml 12123/10 14:331 sml 12117/1002:481 sml 12123/1014:331 sml 12117/1002:481 sml 12123/1014:331 sml 12102110 09:381 ep 12102110 09:381 ep 12102110 09:381 ep Page 3 of 27 Er\ERGY /,.I.)I ·~\I'JI-.(l ~ www.energylab.com Aa/yIII;II ~ SIIru rm Helena, MT 811-412-0111 • Billings, MT 800-735-4489 • Casper, WV 888-235-0515 Gillette, WY 886-&88-7175 • Rapid City, SD 188-872-1225 • College Stalion, 11 881-688-221 8 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: LablD: Denison Mines USA Corp Semi-Annual Groundwater 2010 C1 011 0870-001 Client Sample ID: MW3A Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (O.BO -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-dB Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result -3.16 B7.6 B2.3 5660 0.940 ND ND ND ND ND ND ND ND ND ND 101 112 99.0 95.0 Units % meqlL meqlL mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L %REC %REC %REC %REC Qualifiers RL 20 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 BO-120 70-130 BO-120 BO-120 Report Date: 12/30/10 Collection Date: 11/22/1 0 09 :40 DateReceived: 11/24/1 0 Matrix: Aqueous MCU QCL Method Analysis Date 1 By Calculation 12116/10 07:151 kbh Calculation 12116/10 07:151 kbh Calculation 12116/10 07:151 kbh Calculation 12116/10 07:151 kbh Calculation 12116/10 07:151 kbh SWB260B 12101/10 23:551 jlr SW8260B 12101/10 23:551 jlr SWB260B 12101/10 23:551 jlr SW8260B 12101/10 23:551 jlr SWB260B 12101/10 23:551 jlr SW8260B 12101/10 23:551 jlr SWB260B 12101/10 23:551 jlr SW8260B 12101/10 23:551 jlr SWB260B 12101/10 23:551 jlr SWB260B 12101/10 23:551 jlr SWB260B 12101/10 23:551 jlr SW8260B 12101/10 23:55 1 jlr SW8260B 12101/10 23:55 1 jlr SWB260B 12101/10 23:551 jlr MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 4 of 27 A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter-Semiannual Groundwater 101 1399-00IA Client Sample ID: MW-4 Collection Date: 11115/20101350h Received Date: Method Used: 1111912010 1030h SW8260C Contact: Jo Ann Tischler Analyzed: 11122/2010 0922h Analytical Results VOAs by GCIMS Method 8260CI5030C Units: j.1g/L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-dS CAS Number 109-99-9 17060-07-0 460-00-4 IS6S-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 121 SO-123 104 SO-124 lOS SO-125 9S.8 Report Date: 11/23/2010 Page 4 of25 All analyses a.pplicable to the CWA, SDWA, and ReRA are performed in accordance to NELAC protocols. Pertinent sampling information is located on the aLlached CDC. This report is provjded for the exclusjve use of the addressee. Privileges of subsequent use of the name of this company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or sale of Bny product or process, or in connection with the re-publication of this report for Bny purpose other than for the addressee will be granted only on contact. This company accepts no responsibility except for the due performance of inspection andlor analysis in good faith and according to the rules of the trade and of science. EN:RGY LAUOldd OFU!. !J www.energylab.com AMIyfIt:M ~ SIIIu IIU Helena, MTB77-472-D711 • Billings, MTBDO-735-4489 . Casper, WY8B8-235-D515 GilleHe, WY 866-&86-7175 • Rapid City, SD 888-672-1225 • Collage Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Lab ID: C1 011 0730-001 Client Sample ID: MW4 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS -DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLIDES -DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±l Gross Alpha minus Rn & U MDC Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result ND 359 242 41 0.37 105 ND 5.0 6.6 82.3 869 7.68 1640 ND ND ND ND ND ND ND ND ND ND ND ND 43.7 ND ND ND 8.16 ND ND 0.2 0.08 0.1 Units mg/L mgiL mg/L mg/L mg/L mg/L mg/L mg/L mg/L mgiL mg/L S.u. mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/l pC ilL pC ilL pCi/L MDC -Minimum detectable concentration Report Date: 12/30/10 Collection Date: 11 /1 5/1 0 1 3 :50 DateReceived: 11/19/10 Matrix: Aqueous MCll Qualifiers Rl QCl Method Analysis Date 1 By D D D A2320 B 11/19/10 16:43/jba A2320 B 11/19/1016:431 jba 0.5 E200.7 12106/10 12:45 1 cp A4500-CI B 11/23/10 11 :05 1 Ir 0.10 A4500-F C 11/22/10 11 : 1 0 1 jba 0.5 E200.7 12/06/10 12:451 cp 0.05 A4500-NH3 G 11/29/10 12:351 dc 0.5 E353.2 11/23/1013:021 de 0.5 E200.7 12/06/10 12:451 cp 0.6 E200.7 12/06/10 12:451 cp 50 A4500-S04 E 11/30/10 11 :40 /lr 0.01 A4500-H B 11/19/10 15:42 /ljl 10 A2540 C 11/19/10 14:451 Ijl 5.0 E200.8 11/30/10 04:39 1 sml 0.50 E200.8 11/30/10 04:39 1 sml 0.50 E200.8 11/30/10 04:39 1 sml 25 E200.8 11/30/10 04:39 1 sml 10 E200.8 11/30/1004:39/ sml 10 E200.8 11/30/10 04:39 1 sml 30 E200.7 12/06/10 12:45 1 cp 1.0 E200.8 11/30/10 04:39/ sml 10 E200.8 11/30/10 04:39 / sml 0.50 E200.8 11/30/1004:391 sml 10 E200.8 11/30/1004:39/ sml 20 E200.8 11/30/10 04:391 sml 5.0 E200.8 11/30/10 04:39 / sml 10 E200.8 11/30/10 04:39 1 sml 0.50 E200.8 11/30/10 04:39 1 sml 100 E200.8 11/30/1004:39/ sml 0.30 E200.8 11/30/1004:391 sml 15 E200.8 11/30/1004:391 sml 10 E200.8 11/30/10 04:39 / sml E900.1 02/22/11 22:321 ep E900.1 02122/11 22:32/ ep E900.1 02/22/11 22:321 ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 3 of 34 EN:RGY ~ l\liOf~I\"-CI~ll S www.energylab.com AM~/£XUIII/JCIS1ln:.,m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillatta, WY 866-686-7175 • Rapid City, SD 888-672-1225 • Collage Station, IX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Lab 10: C1 011 0730-001 Client Sample 10: MW4 Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (O.BO -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: l,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-dB Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result -2.17 25.5 24.4 1560 1.05 ND ND 1.2 lBOO ND ND ND ND ND ND 110 lOB 95.0 101 D -RL increased due to sample matrix. Report Date: 12/30/10 Collection Date: 11/15/10 13:50 DateRecelved: 11/19/10 Matrix: Aqueous MCL! Units Qualifiers RL QCL Method Analysis Date 1 By % Calculation 12/16/10 07:071 kbh meq/L Calculation 12/16/10 07:071 kbh meq/L Calculation 12/16/10 07:07 1 kbh mg/L Calculation 12/16/10 07:07 1 kbh Calculation 12/16/10 07:071 kbh ug/L 20 SWB260B 11 /24/10 04:30 1 rmh ug/L 1.0 SWB260B 11/24/1004:301 rmh ug/L 1.0 SWB260B 11/24/10 04:301 rm h ug/L D 100 SWB260B 11/24/1003:531 rmh ug/L 1.0 SWB260B 11/24/10 04:301 rmh ug/L 20 SWB260B 11/24/10 04:301 rmh ug/L 1.0 SWB260B 11/24/10 04:30 1 rmh ug/L 1.0 SWB260B 11/24/10 04:301 rmh ug/L 1.0 SWB260B 11/24/10 04:301 rmh ug/L 1.0 SWB260B 11/24/10 04:301 rmh %REC BO-120 SWB260B 11/24/1004:301 rmh %REC 70-130 SWB260B 11/24/1004:301 rmh %REC BO-120 SWB260B 11/24/1004:30 1 rmh %REC BO-120 SWB260B 11/24/1004:301 rmh MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 4 of 34 A AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter-Semiannual Groundwater 1011302-001A Client Sample ID: MW-5 Collection Date: 11/11/2010 1505h Received Date: Method Used: 11/16/2010 0945h SW8260C Contact: 10 Ann Tischler Analyzed: 11117/2010 1507h Analytical Results VOAs by GCIMS Method 8260CIS030C Units: ~glL Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 1.31 77-144 108 80-123 106 80-124 101 80-125 97.5 Report Date: 11 /22/20 1 0 Page 4 of 13 All analyses applicable to the CWA, SDWA. and RCRA are pcrronned in accord an co to NELAC protocols. Pertinent sampling information is located on the attached CDC. This report is provided for the exclusive use of the addressee. Privileges Dr subsequent use of the name of this company or any member of its staff, or reproduction of this report in connection with tbe advertisement, promotion or sale of any product or process, or;n connection with the re-publication of this report for any purpose other than for the addressee will be granted only on contact. This company accepts no responsibilily except for the due performance of in spec lion and/or analysis in good faith and according to the rules orttIe trade and of science. EN:RGY _ /\HOJ U\.1 Oltli S -rm" www.energylab.com AR/yfkIII~ SIKI 1m Helena, MT877-4lZ-0711 • Billings, MT 80D-735-4489 . Casper, WY 888-235-0515 Gillette, WY 86&-686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Project: Semi Annual Groundwater LablD: C1 011 0584-001 Client Sample ID: MW5 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TOS @ 180 C METALS -DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLIDES -DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MOC Report Definitions: Rl -Analyte reporting limit. QCL -Quality control limit. Result NO 390 146 52 0.92 40.6 0.54 0.2 9.2 487 1260 7.81 2210 NO NO NO NO NO NO 46 NO 252 NO NO NO NO NO NO NO 11.6 NO NO 0.3 0.08 0.1 Units mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mglL mglL mglL s.u. mg/L ug/L ug/L ug/L ug/L ug/L ug/l ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L pCi/L pCilL pC ilL MOC -Minimum detectable concentration Report Date: 12/08/10 Collection Date: 11/11/10 15:05 DateRecelved: 11/16/10 Matrix: Aqueous MCU Qualifiers Rl QCl Method Analysis Date I By 0 0 A2320 B 11/16/10 18:221 jba A2320 B 11/16/10 18:22/jba 0.5 E200.7 12/03/1014:411 cp 1 A4500-CI B 11/23/1010:48/1r 0.10 A4500-F C 11/17/1010:591 jba 0.5 E200.7 12/03/1014:411 cp 0.05 A4500-NH3 G 11/17/10 16:381 dc 0.1 E353.2 11/19/10 12:38/dc 0.5 E200.7 12103/1014:411 cp 0.6 E200.7 12103/1014:41/cp 50 A4500-S04 E 11/30/10 11 :26 Ilr 0.01 A4500-H B 11/16/10 12:42/1r 10 A2540 C 11/16/10 16:14/1r 5.0 E200.8 11/20/1009:50 I sml 0.50 E200.8 11/20/1009:50 I sml 0.50 E200.8 11/20/10 09:50 I sml 25 E200.8 11/20/1009:50 I sml 10 E200.8 11/20/10 09:50 I sml 10 E200.8 11/20/10 09:50 I sml 30 E200.7 12/03/1014:411 cp 1.0 E200.8 11/20/10 09:50 I sml 10 E200.8 11/20/1009:50 I sml 0.50 E200.8 11/20/10 09:50 I sml 10 E200.8 11/20/1009:50 I sml 20 E200.8 11/20/1009:50 I sml 5.0 E200.8 11/20/1009:50 I sml 10 E200.8 12/04/10 11 :23 I sml 0.50 E200.8 11/20/10 09:50 I sml 100 E200.8 11 /20/1009:50 I sml 0.30 E200.8 11 /20/1009:50 I sml 15 E200.8 11/20/1009:50 I sml 10 E200.8 11/20/10 09:50 I sml E900.1 02/22/11 22:321 ep E900.1 02/22/11 22:321 ep E900.1 02/22/11 22:321 ep Mel -Maximum contaminant level. NO -Not detected at the reporting limit. o -RL increased due to sample matrix. Page 3 of 32 EN:RGY .. l\u.DI~t\1 Cf:jll :J www.energylab.com AMIytJm Em1IHft SIIu 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Cuper, WY 888-235-0515 Gillette, WY 86&-&8&-7175 . Rapid City, so 888-612-1225 · ColiegeStalion, IX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/08/10 Collection Date: 11/11/1015:05 DateRecelved: 11/16/10 Matrix: Aqueous Client: Project: LablD: Denison Mines USA Corp Semi Annual Groundwater C1 011 0584-001 Client Sample ID: MW 5 Analyses DATA QUALITY NC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (O.BO -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-dB Report Definitions: Rl -Analy1e reporting limit. QCL -Quality control limit. Result -3.05 34.1 32.1 2200 1.00 ND ND ND ND ND ND ND ND ND ND 106 123 100 104 MCU Units Qualifiers Rl QCl Method Analysis Date 1 By % Calculation 12/05/10 11 :231 kbh meq/L Calculation 12/05/10 11 :23 1 kbh meq/L Calculation 12/05/10 11 :23 1 kbh mg/L Calculation 1210511 0 11 :23 1 kbh Calculation 12/05/1 0 11 :23 1 kbh ug/L 20 SWB260B 11/24/10 00:571 rmh ug/L 1.0 SWB260B 11/24/1000:571 rmh ug/L 1.0 SWB260B 11/24/10 00:571 rmh ug/L 1.0 SWB260B 11/24/1000:571 rmh ug/L 1.0 SWB260B 11/24/10 00:571 rm h ug/L 20 SWB260B 11/24/1000:571 rmh ug/L 1.0 SWB260B 11/24/1000:571 rmh ug/L 1.0 SWB260B 11/24/1000:571 rmh ug/L 1.0 SWB260B 11/24/1000:571 rmh ug/L 1.0 SWB260B 11/24/1000:571 rmh %REC BO-120 SWB260B 11/24/1000:571 rmh %REC 70-130 SWB260B 11/24/1000:571 rmh %REC BO-120 SW8260B 11/24/1000:571 rmh %REC 80-120 SWB260B 11/24/1000:571 rmh MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 4 of 32 A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANAL YTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter-Semiannual Groundwater 1011302-002A Client Sample ID: MW-ll Collection Date: 1111112010 1215h Received Date: Method Used: 1111612010 0945h SW8260C Contact: Jo Ann Tischler Analyzed: 11117/2010 1526h Analytical Results VOAs by GCIMS Method 8260CI5030C Units: IlgiL Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 108 80-123 105 80-124 101 80-125 96.0 Report Date: 11/22/2010 Page 5 ofl3 All analyses applicable to the CWA, SDWA, and RCRA are performed in accordance to NELAC protocols. Pertinent S8mpliog inCormation is located on the attached COC~ This report. is provided for the exclusive usc of the addressee. Privileges of subsequent usc of the name oflhis company or any member of its staff, or reproduction of this report in connection with the a.dverlisemenl, promotion or sale orany product or process, or in connection with the re·publication oflhis report for any purpose other than for the addressee will be granted only on contact This company accepts no responsibility except for the due performance ofinspeclion andlor analysis in good faith and according to the rules of the trade and of science. EN:RGY J\)--.JOr II\TOnl~~. YIWW.energylab.com AtlIIytkII Eic.u.nc. SIM. 1m Helena, MT 877-412-0111 • Billings, MT 80D-135-4489 • Casper, WY 888-235-D515 Gillette, WY 8&&-186-7175 • Rapid City, SD 888-672-1225 • College Sialion, IX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Project: Semi Annual Groundwater Lab ID: C1 011 0584-002 Client Sample ID: MW 11 Analyses MAJOR IONS Carbonate as C03 8icarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sullate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS -DISSOLVED Arsenic 8eryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLlDES· DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result ND 387 68.0 34 0.49 20.1 0.66 ND 6.9 573 1180 7.96 2020 ND ND ND ND ND ND 58 ND 133 ND ND ND ND ND ND ND 0.87 ND ND 0.2 0.08 0.1 Units mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L S.u. mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L pCi/L pC ilL pC ilL MDC -Minimum detectable concentration Report Date: 12/08/10 Collection Date: 11/11/1012:15 DateReceived: 11/16/10 Matrix: Aqueous MCL! Qualifiers RL QCL Method Analysis Date 1 By D D A23208 11/16/1018:311 jba A23208 11/16/1018:311 jba 0.5 E200.7 12/03/10 14:49 I cp A4500-CI8 11/23/1010:52/1r 0.10 A4500-F C 11/17/10 11:06/jba 0.5 E200.7 12/03/10 14:49 I cp 0.05 A4500-NH3 G 11/17/1016:40 I de 0.1 E353.2 11/19/1012:41/dc 0.5 E200.7 12103/10 14:491 cp 0.6 E200.7 12/03/10 14:49/cp 50 A4500-S04 E 11/30/10 11 :29 /lr 0.01 A4500-H 8 11/16/10 12:45/1r 10 A2540 C 11/16/1016:15/1r 5.0 E200.8 11/20/1009:571 sml 0.50 E200.8 11/20/1009:571 sml 0.50 E200.8 11/20/1009:571 sml 25 E200.8 11/20/1009:571 sml 10 E200.8 11/20/10 09:57/ sml 10 E200.8 11/20/10 09:57 I sml 30 E200.7 12/03/10 14:49 I cp 1.0 E200.8 11/20/10 09:571 sml 10 E200.8 11/20/10 09:57 I sml 0.50 E200.8 11/20/1009:57 I sml 10 E200.8 11/20/10 09:57 I sml 20 E200.8 11/20/1009:57 I sml 5.0 E200.8 11/20/1009:571 sml 10 E200.8 12/04/10 11 :30 I sml 0.50 E200.8 11/20/1009:571 sml 100 E200.8 11/20/1009:57 I sml 0.30 E200.8 11/20/10 09:57 I sml 15 E200.8 11/20/1009:57 I sml 10 E200.8 11/20/10 09:57 I sml E900.1 02/22/11 22:32 I ep E900.1 02/22/11 22:32 I ep E900.1 02/22/11 22:32 I ep MCl -Maximum contaminant level. ND -Not detected at the reporting limit. D -Rl increased due to sample matrix. Page 5 of 32 EN:RGY _ I\tionA"'OI~H !.J www.energylab.com ~I fXuIIHt:fI SiIa 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 8&&-68&-7175 • Rapid City, so 888-&72-1225 • College Station, IX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/08/10 Collection Date: 11/11/10 12:15 DateReceived: 11/16/10 Matrix: Aqueous Client: Project: LablD: Denison Mines USA Corp Semi Annual Groundwater C1 011 0584-002 Client Sample ID: MW 11 Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-0ichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-dB Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result -2.58 31.8 30.2 2080 0.970 ND NO ND NO ND ND NO NO ND NO 108 126 101 104 MCll Units Qualifiers Rl QCl Method Analysis Date 1 By % Calculation 12/05/1 0 11 :241 kbh meq/l Calculation 12/05/10 11 :241 kbh meq/l Calculation 12/05/10 11 :241 kbh mg/l Calculation 12/05/1 0 11 :24 1 kbh Calculation 12/05/1 0 11 :24 1 kbh ug/l 20 SW8260B 11/24/1001 :331 rmh ug/l 1.0 SW8260B 11/24/10 01 :331 rmh ug/L 1.0 SW8260B 11/24/10 01 :331 rmh ug/L 1.0 SWB260B 11/24/1001 :331 rmh ug/L 1.0 SW8260B 11/24/1001 :331 rmh ug/L 20 SW8260B 11/24/1001 :331 rmh ug/L 1.0 SW8260B 11/24/1001 :33 1 rmh ug/L 1.0 SW8260B 11/24/1001 :33 1 rmh ug/L 1.0 SW8260B 11/24/1001 :33 1 rmh ug/L 1.0 SW8260B 11/24/1001 :33 1 rmh %REC 80-120 SW8260B 11/24/1001 :33 1 rmh %REC 70-130 SW8260B 11/24/1001 :33 1 rmh %REC 80-120 SWB260B 11/24/10 01 :33 1 rmh %REC 80-120 SWB260B 11/24/10 01 :331 rmh MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 6 of 32 A AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter -Semiannual Groundwater 10 11452-003A Client Sample ID: MW-12 Collection Date: 11/19/2010 1008h Received Date: Method Used: 11123/2010 1025h SW8260C Contact: Jo Ann Tischler Analyzed: 11124/2010 2007h Analytical Results VOAs by GCIMS Method 8260C/S030C Units: IlgIL Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 110 80-123 107 80-124 102 80-125 99.7 Report Date: 11/29/2010 Page 6 of27 All analyses applicable to the CWA, SDWA, and RCRA arc performed in accordance Lo NELAC protocols. Pertinenl sampling information is locaLed on the attached COCo This report is provided for the exclusive use of the addressee. Privllcges of subsequent use of the name of this company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection with Lbe re-publication orthis report for any purpose other than for Lbe addressee will be gnmted only on contaCt. This company accepts no responsibility except for the due perfonnance ofinspectiotl andlor analysis in good faith and according to the rules of the trade and of science. EN:RGY I f\l-it )H~\I :)HI ..-') www.enerllYlab.com ARMy/II:II ~ SIne. rm Helena, MT 871·412·0111 • Billings, MT 800·735-4489 • Casper, WY 888·235·0515 Gillette, WV 866-686·7175 • Rapid City, SD 888·672·1225 • College Station, TX 888·690·2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Lab ID: C1 011 0844-003 Client Sample ID: MW 12 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS· DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLIDES • DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result ND 421 510 63 0.26 214 0.12 ND 12.7 306 2480 7.90 3850 ND ND ND ND ND ND ND ND 220 ND ND ND 27.6 ND ND ND lB.O ND ND 0.5 0.6 O.B Units mg/l mg/l mg/l mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L S.u. mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L pCi/L pCi/L pCi/L MDC -Minimum detectable concentration U -Not detected at minimum detectable concentration Report Date: 01/06/11 Collection Date: 11/19/10 10:08 DateReceived: 11/23/10 Matrix: Aqueous MCll Qualifiers Rl QCl Method Analysis Date 1 By D D D D U A2320 B 11/23/10 19:31 1 jba A2320 B 11/23/1019:311 jba E200.7 12116/1016:031 cp 1 A4500-CI B 12115/10 15:12/1mc 0.10 A4500-F C 12101/1009:581 jba 0.5 E200.7 12116/1016:031 cp 0.05 A4500-NH3 G 11/29/1013:131 dc 0.1 E353.2 11/24/1013:371 dc 0.5 E200.7 12116/10 16:031 cp E200.7 12116/1016:031 cp 50 A4500-S04 E 11/30/10 12:12/1r 0.01 A4500-H B 11/24/1010:40/1r 11 A2540 C 11/23/10 16:45/1r 5.0 E200.8 12122110 11 :58 1 sml 0.50 E200.8 12122110 11 :58 1 sml 0.50 E200.8 12122110 11 :58 1 sml 25 E200.8 12122110 11 :58 1 sml 10 E200.8 12123/10 08:131 sml 10 E200.B 12123/10 OB:13 1 sml 30 E200.7 12116/1016:031 cp 1.0 E200.B 12123/10 14:26 1 sm I 10 E200.B 12122110 11 :5B 1 sml 0.50 E200.8 12123/10 14:261 sml 10 E200.B 12122110 11 :5B 1 sml 20 E200.B 12123/10 OB:13 1 sml 5.0 E200.B 12123/10 OB:131 sml 10 E200.B 12123/10 OB:13 1 sml 0.50 E200.B 12123/10 14:261 sml 100 E200.8 12123/10 OB:13 1 sml 0.30 E200.B 12123/10 14:261 sml 15 E200.B 12122110 11 :5B 1 sml 10 E200.B 12123/10 OB:13 1 sml E900.1 12102110 12:45 1 ep E900.1 12102110 12:451 ep E900.1 12102110 12:451 ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 7 of 36 EN:RGY ll'.~()H,\'''UI " www.energylab.com AMIyfIaI~SIIu 1m Helena, MT 877-412-0111 • Billings, MT 800-735-4489 • Casper, WV 888-235-0515 Gillette, WV 886-88&-7115 • Rapid City, SD 118-672-1225 • College Station, TX 888-690·2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: LablD: Denison Mines USA Corp Semi-Annual Groundwater 2010 C1 011 0844-003 Client Sample ID: MW 12 Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TOS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-0ichlorobenzene-d4 Surr: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result -3.15 60.3 56.7 3830 1.01 NO NO ND NO NO ND ND ND NO ND 99.0 102 97.0 99.0 Units % meqll meqll mgll ugiL ugiL ugiL ug/L ug/L ug/L ugiL ugiL ugiL ug/l %REC %REC %REC %REC Qualifiers Rl 20 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 80-120 70-130 80-120 80-120 Report Date: 01/06111 Collection Date: 11/19/10 10:08 DateReceived: 11/23/10 Matrix: Aqueous MCU QCl Method Analysis Date 1 By Calculation 12123/1007:171 kbh Calculation 12123/10 07:171 kbh Calculation 12123/10 07:17 1 kbh Calculation 12123/10 07:171 kbh Calculation 12123/10 07:171 kbh SW8260B 12101110 16:391 jlr SW8260B 12101/10 16:391 jlr SW8260B 12101/10 16:391 jlr SWB260B 12101/10 16:391 jlr SW8260B 12101/1016:391 jlr SW8260B 12101/10 16:39 1 jlr SW8260B 12101/10 16:391 jlr SW8260B 12101/10 16:391 jlr SW8260B 12101/10 16:391 jlr SW8260B 12101/10 16:391 jlr SW8260B 12101/1016:391 jlr SW8260B 12101/10 16:391 jlr SW8260B 12101/1016:391 jlr SW8260B 12101/1016:391 jlr MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 8 of 36 A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter-Semiannual Groundwater 1011246-001A Client Sample ID: MW-14 Collection Date: 11110/2010 1515h Received Date: 11112/2010 1000h Method Used: SW8260C Contact: Jo Ann Tischler Analyzed: 11117/2010 1157h Analytical Results VOAs by GC/MS Method 8260CI5030C Units: I-1g/L Dilution Factor: 1 Compound Tetrahydrofuran SUIT: 1,2-Dichloroethane-d4 SUIT: 4-Bromofluorobenzene SUIT: Dibromofluoromethane SUIT: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 104 80-123 105 80-124 98.9 80-125 99.0 Report Date: 11/19/20 I 0 Page 4 ofl5 All analyses applicable to the CWA. SDWA, and RCRA are performed in accordance to NELAC protocols. Pertinent sampling information is located on the attached COCo This report is provided for the exclusive use of the addressee. Privileges ofsubsequenl use of the name of this company or any member of its staff, or reproduction of this report in connectLon with the advertisement, promotion or sale crany product or process, or in connection with Lhe re-publication of this report for any purpose other tban for the addressee will be granted only on contact. This company accepts no responsibility except for the due performance of inspection and/or analysis in good [a1th IlIld according to the rules of the trade and of science. EI\ERGY ,\j-j~)I1/d L-H,~ • www.energytab.com AIrJ/yIkII ExuIIItIa SI«IIJJZ Helena, NT 877-472-0711 • Billings, MT BOD-735-4489 . Casper, WY 888-235-D515 Gilletts, WY 816-186-7175 • Rapid City, SD 888-672-1225 • CDlIsgeStation, 1X 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/29/10 Collection Date: 11/10/1015:15 DateReceived: 11/12/10 Matrix: Aqueous Client: Denison Mines USA Corp Project: LablD: 4th Quarter-Semi-Annual Groundwater C1 011 0505-001 Client Sample ID: MW 14 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS -DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLIDES -DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result Units ND mg/L 480 mg/L 492 mg/L 18 mg/L 0.15 mg/L 144 mg/L 0.19 mg/L ND mg/L 11.5 mg/L 318 mg/L 2170 mg/L 7.09 S.u. 3510 mg/L ND ug/L ND ug/L 1.10 ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L 1980 ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L 62.2 ug/L ND ug/L 12 ug/L 0.3 pCilL 0.09 pCilL 0.1 pCilL MDC -Minimum detectable concentration MCU Qualifiers RL QCL Method Analysis Date I By D D D A2320 B 11/13/1001 :35 1 jba A2320 B 11/13/10 01 :351 jba E200.7 12/01/10 15:20 I cp A4500-CI B 11/16/1009:201lr 0.10 A4500-F C 11/12/1013:11/jba 0.5 E200.7 12101/1015:201 cp 0.05 A4500-NH3 G 11/17/1016:04 1 dc 0.1 E353.2 11/12/1016:051 dc 0.5 E200.7 12101/1015:20 I cp E200.7 12/01/1015:201 cp 50 A4500-S04 E 11/16/10 13:47 Ilr 0.01 A4500-H B 11/12/10 15:0311r 10 A2540 C 11/12/10 15:0911r 5.0 E200.8 11/20/10 08:221 sml 0.50 E200.8 11/20/10 08:22 1 sml 0.50 E200.8 11/20/10 08:221 sml 25 E200.8 11/20/10 08:221 sml 10 E200.8 11/20/1008:221 sml 10 E200.8 11/20/1008:22 1 sml 30 E200.7 12101 /10 15:20/cp 1.0 E200.8 11/20/1008:22/sml 10 E200.8 11/20/1008:22/sml 0.50 E200.8 11/20/1008:22/sml 10 E200.8 11/20/1008:221 sml 20 E200.8 11/20/1008:221 sml 5.0 E200.8 11/20/1008:221 sml 10 E200.8 11/30/10 01 :54 1 sml 0.50 E200.8 11/20/1008:221 sml 100 E200.8 11/20/1008:221 sml 0.30 E200.8 11/20/1008:221 sml 15 E200.8 11/20/1008:22 1 sml 10 E200.8 11 /20/1008:221 sml E900.1 02/22/11 22:321 ep E900.1 02/22/11 22:321 ep E900.1 02/22/11 22:32 1 ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 3 of 38 EN:RGY ,'\\ "::)I .. \!(,lnl S www.energylab.com ~tJuJ'-Sllc./W Helena, MT 871-472-0711 • Billings, MT 800-735-4489 . Casper, WV 888-235-0515 Gillette, WY 816-186-7175 • Rapid City, SD 188-672-1225 • College Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/29/10 Collection Date: 11/10/10 15:15 DateReceived: 11/12/10 Matrix: Aqueous Client: Denison Mines USA Corp Project: Lab 10: 4th Quarter-Semi-Annual Groundwater C1 011 0505-001 Client Sample 10: MW 14 Analyses DATA QUALITY NC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-dS Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result Units -2.84 % 53.5 meq/L 50.5 meq/L 3400 mg/L 1.03 ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L 106 %REC 9S.0 %REC 100 %REC 100 %REC MCl! Qualifiers Rl QCl Method Analysis Date 1 By Calculation 12105/10 11 :13 1 kbh Calculation 12/05/1011 :131 kbh Calculation 12/05/10 11 :13/kbh Calculation 12/05/1011 :131 kbh Calculation 12/05/1011 :131 kbh 20 SW8260B 11/19/10 15:1SI rmh 1.0 SWS260B 11/19/10 15:1SI rmh 1.0 SWS260B 11/19/10 15:1SI rmh 1.0 SWS260B 11/19/10 15:1S/rmh 1.0 SWS260B 11/19/10 15:1S/rmh 20 SWS260B 11/19/10 15:1SI rmh 1.0 SWS260B 11/19/10 15:1SI rmh 1.0 SWS260B 11/19/10 15:18/rmh 1.0 SWS260B 11/19/10 15:1S/rmh 1.0 SWS260B 11/19/1015:181 rmh 80-120 SWS260B 11/19/10 15:1S/rmh 70-130 SWS260B 11/19/10 15:1S/rmh SO-120 SWS260B 11/19/10 15:1SI rmh SO-120 SWS260B 11/19/10 15:1SI rmh MCL - Maximum contaminant level. ND -Not detected at the reporting limit. Page 4 of 38 A AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter-Semiannual Groundwater 1011302-003A Client Sample ID: MW-15 Collection Date: 11/1112010 1130h Received Date: Method Used: 11/1612010 0945h SW8260C Contact: Jo Ann Tischler Analyzed: 11117/2010 1546h Analytical Results VOAs by GC/MS Method 8260CI5030C Units: ).LgIL Dilution Factor: 1 Compound Tetrahydrofuran SUIT: 1,2-Dich1oroethane-d4 SUIT: 4-Bromofluorobenzene SUIT: Dibromofluoromethane SUIT: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 111 80-123 103 80-124 101 80-125 95.9 Report Date: 11/22/2010 Page 6 of 13 All analyses applicable to the CWA, SDWA, and RCRA are performed in accordance to NELAC protocols. Pertinent sampling infonnaLion is located on Lhe attached CDC. This report is provided for the exclusive use of the addressee. Privileges of subsequent use of the name of this company or any member of its staff, or reproduction of this report in connection with Lhe advertisement, promotion or sale of any producL or process, or in connecLion wiLh the re-publication ofLhis report for any purpose olher than for lhe addressee will be granLed only on contact. This company accepls no responsibility except for the due perfonnance of in spec lion and/or analysis in good faith and according to the rules ofthe trade and of science. Ef\ERGY , AI 100, .. 1 cr~I L:S www.energylab.com AlllljtJQlbuU«lC.SlJrClIW Helena, MT 817-472-0711 • Billings, MT 800-735-4489 • Casper, WV 888-235-0515 Gillette, WV 886-886-7175 • Rapid City, SD 888-672-1225 • College Station, 1X 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Project: Semi Annual Groundwater LablD: C 10110584-003 Client Sample ID: MW 15 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS -DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLIDES -DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±l Gross Alpha minus Rn & U MDC Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result ND 446 412 41 0.23 148 ND 0.1 10.5 468 2350 7.87 3850 ND ND ND ND ND ND ND ND ND ND ND ND 99.5 ND ND ND 46.9 ND ND 0.05 0.07 0.1 Units mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L S.u. mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L pC ilL pC ilL pC ilL MDC -Minimum detectable concentration U -Not detected at minimum detectable concentration Report Date: 12/08/10 Collection Date: 11/11/1011:30 DateReceived: 11/16/10 Matrix: Aqueous MCL! Qualifiers RL QCL Method Analysis Date 1 By D D D D U A2320 B 11/16/1018:401 jba A2320 B 11/16/10 18:40 1 jba , E200.7 12/03/10 14:531 cp 1 A4500-CI B 11/23/1010:55/1r 0.10 A4500-F C 11/17/1 0 11 :27 1 jba 0.5 E200.7 12/03/10 14:531 cp 0.05 A4500-NH3 G 11/17/10 16:42/dc 0.1 E353.2 11/19/10 12:431 de 0.5 E200.7 12/03/10 14:531 cp E200.7 12/03/10 14:53 1 cp 50 A4500-S04 E 11/30/10 11 :32 1 Ir 0.01 A4500-H B 11/16/10 12:55/1r 11 A2540 C 11/16/10 16:15/1r 5.0 E200.8 11/20/10 10:031 smi 0.50 E200.8 11/20/1010:031 sml 0.50 E200.8 11/20/10 10:031 sml 25 E200.8 11/20/1010:031 sml 10 E200.8 11/20/10 10:031 sml 10 E200.8 11/20/1010:031 sml 30 E200.7 12/03/10 14:53 1 cp 1.0 E200.8 11/20/10 10:031 sml 10 E200.8 11/20/1010:031 sml 0.50 E200.8 11/20/1010:031 sml 10 E200.8 11/20/1010:031 sml 20 E200.8 11/20/1010:031 sml 5.0 E200.8 11/20/1010:031 sml 10 E200.8 12/04/10 11 :37 1 sml 0.50 E200.8 11/20/1010:031 sml 100 E200.8 11/20/1010:031 sml 0.30 E200.8 11/20/10 10:03 1 sml 15 E200.8 11/20/1010:031 sml 10 E200.8 11/20/1010:031 sml E900.1 02/22/11 22 :32 1 ep E900.1 02/22/11 22:321 ep E900.1 02/22/11 22:32 1 ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 7 of 32 EN:RGY i\[ IOHA'O:~H ~j ----m?J~ www.energylab.com AIu/ytk;JI rn./llrlcl Silel 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 866-&86-7175 • Rapid City, SD 888-672-1225 . Colloge Station,1X 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Project: Semi Annual Groundwater Lab 10: C1 011 0584-003 Client Sample 10: MW 15 Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result -3.72 57.5 53.4 3670 1.05 ND ND ND ND ND ND ND ND ND ND 108 132 106 106 Units % meq/l meq/l mg/l ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L %REC %REC %REC %REC S -Spike recovery outside of advisory limits. Report Date: 12/08/10 Collection Date: 11/11/10 11 :30 DateReceived: 11/16/10 Matrix: Aqueous MCL! Qualifiers Rl QCl Method Analysis Date 1 By Calculation 12/05/10 11 :241 kbh Calculation 12105/1 0 11 :24 1 kbh Calculation 12105/1 0 11 :24 1 kbh Calculation 12/05/1 0 11 :24 1 kbh Calculation 12/05/1 0 11 :24 1 kbh 20 SW8260B 11/24/1002:091 rmh 1.0 SW8260B 11/24/1002:091 rmh 1.0 SW8260B 11/24/1002:091 rmh 1.0 SW8260B 11/24/10 02:091 rmh 1.0 SW8260B 11/24/10 02:091 rmh 20 SW8260B 11/24/1002:091 rmh 1.0 SW8260B 11/24/1002:091 rmh 1.0 SW8260B 11/24/1002:091 rmh 1.0 SW8260B 11/24/1002:091 rmh 1.0 SW8260B 11/24/1002:091 rmh 80-120 SW8260B 11/24/1002:091 rmh S 70-130 SW8260B 11/24/1002:091 rmh 80-120 SW8260B 11/24/10 02:091 rmh 80-120 SW8260B 11/24/1002:091 rmh MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 8 of 32 A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, VT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter-Semiannual Groundwater 1011399-002A Client Sample ID: MW-17 Collection Date: 11117/2010 1255h Received Date: Method Used: 11119/2010 1030h SW8260C Contact: Jo Ann Tischler Analyzed: 11122/2010 0941h Analytical Results VOAs by GCIMS Method 8260C/S030C Units: ~gIL Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result QUill 1.00 < 1.00 77-144 121 80-123 104 80-124 104 80-125 95.2 Report Date: 11123/2010 Page 5 of25 All analyses applicable to the CWA, SDWA, and RCRA are perfonned in accordance to NELAC protocols. Pertinent sampling information is located on the auached COCo This repor! is provided for the exclusive use of the addressee. Privileges ofsubsequenl use of the name of this company or any member ofits slaff, or reproduction oflhis report in connection with the advertisement, promotion or sale of any product or process, orin connection with the re-publiclltion of this report for any purpose olher than for the addressee will be granted only on contact. This company accepts no responsibility except for the due perrormance of inspection and/or analysis in good faith and according to the rules o[lhe trade and of science. EN:RGY L I\P..OllAI OliIL:': www.energytab.com AMIytIm~smc. ,m Helens, MT 877-472-0711 • Billings, MT 800-735-4489 . Casper, WY aB8-235-0515 Gillette, WY 866-686-7175 • Rapid City, SO 888-672-1225 • College Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Lab 10: C1 011 0730-002 Client Sample 10: MW 17 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS· DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLIDES· DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result ND 478 353 38 0.26 171 0.07 1.1 11.9 564 2340 7.53 3860 ND ND ND ND ND ND ND ND 164 ND ND ND 11.7 ND 0.51 ND 25.6 ND ND 0.4 0.09 0.1 Units mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L S.u. mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L pCilL pCi/L pCi/L MDC -Minimum detectable concentration Report Date: 12/3011 0 Collection Date: 11/17/10 12:55 DateReceived: 11/19/10 Matrix: Aqueous MCL! Qualifiers RL QCL Method Analysis Date 1 By D D D D A2320 B 11/19/1016:521 jba A2320 B 11/19/1016:521 jba E200.7 12/06/10 12:491 cp A4500-CI B 11/23/10 11 :08 1 Ir 0.10 A4500-F C 11/22/1011:171 jba 0.5 E200.7 12/06/10 12:49 1 cp 0.05 A4500-NH3 G 11/29/1012:371 dc 0.1 E353.2 11/23/1013:041 dc 0.5 E200.7 12/06/10 12:49 1 cp E200.7 12/06/1012:491 cp 50 A4500-S04 E 11/30/1011:41/1r 0.01 A4500-H B 11/19/10 15:50 1 Ijl 11 A2540 C 11/19/10 14:47/1jl 5.0 E200.8 11/30/10 04:461 sml 0.50 E200.8 11/30/10 04:461 sml 0.50 E200.8 11/30/1004:461 sml 25 E200.8 11/30/1004:461 sml 10 E200.8 11/30/1004:461 sml 10 E200.8 11/30/1004:461 sml 30 E200.7 12/06/1012:491 cp 1.0 E200.8 11/30/10 04:461 sml 10 E200.8 11/30/10 04:46 1 sml 0.50 E200.8 11/30/1004:46/sml 10 E200.8 11/30/1004:461 sml 20 E200.8 11/30/1004:461 sml 5.0 E200.8 11/30/1004:461 sml 10 E200.8 11/30/10 04:46 1 sml 0.50 E200.8 11/30/10 04:46 1 sml 100 E200.8 11/30/10 04:461 sml 0.30 E200.8 11/30/1004:461 sml 15 E200.8 11/30/1004:461 sml 10 E200.8 11/30/1004:461 sml E900.1 02/23/11 05:241 ep E900.1 02/23/11 05 :24 1 ep E900.1 02/23/11 05 :24 / ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 5 of 34 EI\ERGY , I\BOr;'~\I C.JHIt ~ www.energylab.eom AIuIytIt:M rzuu.-SIIU 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 866-68&-7175 • Rapid City, SD 888-672-1225 • College Station, 1X 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/30/10 Collection Date: 11/17/10 12:55 DateReceived: 11/19/10 Matrix: Aqueous Client: Project: LablD: Denison Mines USA Corp Semi-Annual Groundwater 2010 C1 011 0730-002 Client Sample ID: MW 17 Analyses DATA QUALITY NC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (O.BO -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-dB Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result -0.940 57.7 56.6 3730 1.03 ND ND ND ND ND ND ND ND ND ND 111 110 97.0 103 MCL! Units Qualifiers RL QCL Method Analysis Date 1 By % Calculation 12/16/10 07:07 1 kbh meq/L Calculation 12/16/10 07:071 kbh meq/L Calculation 12/16/10 07:07 1 kbh mg/L Calculation 12/16/10 07:071 kbh Calculation 12/16/10 07:071 kbh ug/L 20 SWB260B 11/24/1000:491 rmh ug/L 1.0 SWB260B 11/24/10 00:491 rmh ug/L 1.0 SWB260B 11/24/10 00:49/ rmh ug/L 1.0 SWB260B 11/24/10 00:491 rmh ug/L 1.0 SWB260B 11/24/1000:49/ rmh ug/L 20 SWB260B 11/24/1000:491 rmh ug/L 1.0 SWB260B 11/24/1000:491 rmh ug/L 1.0 SWB260B 11/24/1000:491 rmh ug/L 1.0 SWB260B 11/24/10 00:491 rmh ug/L 1.0 SWB260B 11/24/1000:491 rmh %REC BO-120 SWB260B 11/24/1000:491 rmh %REC 70-130 SWB260B 11/24/1000:491 rmh %REC BO-120 SWB260B 11/24/10 00:491 rmh %REC BO-120 SWB260B 11/24/10 00:491 rmh MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 6 of 34 AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter -Semiannual Groundwater 1011452-004A Client Sample ID: MW-18 Collection Date: 11118/2010 1140h Received Date: Method Used: 11/23/20101025h SW8260C Contact: Jo Ann Tischler Analyzed: 11124/2010 2026h Analytical Results VOAs by GCIMS Method 8260CIS030C Units: ~gIL Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 109 80-123 107 80-124 103 80-125 98.9 Report Date: 11/29/2010 Page 7 of27 All analyses applicable to the CWA, SDWA. and RCRA are perfonned in accordance to NELAC protocols. Pertinent sampling infonnation is located on the attached COCo This report is provided [or Lhe exclusive use oftbe addressee. Privileges of subsequent use of the name of this company or any member of its staff, or reproduction of this report in connection with the advertisement, promoLion or sale of any product or process, or in connection with the re-publication of this report for any purpose other than for the addressee will be granted only on contact. This company accepts no responsibility except for the due performance of inspection and/or analysis in good faith and according Lo the rules of the trade and of science. EN:RGY 'A~j,(}I.'~~.I·lfJI • www.energylab.com AMIyfIaI Exu/IIig smc. rm Helena, MT 811-472-0111 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 865-68&-7175 • Rapid City, SD 888-&72-1225 . College Station, 1X 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Lab 10: C 1 011 0844-004 Client Sample 10: MW 18 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS -DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLIDES -DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result ND 469 564 52 0.22 126 0.09 ND 9.6 174 1910 7.87 3030 ND ND ND ND ND ND 94 ND 70 ND ND ND ND ND 3.57 ND 42.7 ND ND 1.1 0.7 0.8 Units mgJL mg/L mg/L mg/L mg/L mg/L mgJL mg/L mgJL mgJL mgJL s.u. mgJL ug/L ug/L ug/L ugJL ugJL ug/L ug/L ug/L ug/L ug/L ug/L ugJL ugJL ugJL ugJL uglL uglL ugJL uglL pCi/L pCi/L pC ilL MDC -Minimum detectable concentration Report Date: 01/06/11 Collection Date: 11/18/10 11 :40 DateReceived: 11/23/10 Matrix: Aqueous MCU Qualifiers RL QCL Method Analysis Date I By D D D A2320 B A2320 B E200.7 A4500-CI B 0.10 A4500-F C 0.5 E200.7 0.05 A4500-NH3 G 0.1 E353.2 0.5 E200.7 E200.7 50 A4500-S04 E 0.01 A4500-H B 10 A2540 C 5.0 E200.8 0.50 E200.8 0.50 E200.8 25 E200.8 10 E200.8 10 E200.8 30 E200.7 1.0 E200.8 10 E200.8 0.50 E200.8 10 E200.8 20 E200.B 5.0 E200.8 10 E200.B 0.50 E200.B 100 E200.B 0.30 E200.8 15 E200.B 10 E200.B E900.1 E900.1 E900.1 MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. 11/23/10 19:391 jba 11/23/10 19:39 1 jba 12116/10 16:071 cp 12115/10 15:16 lime 12101/10 10:021 jba 12116/1016:071 cp 11/29/1013:21 1 dc 11/24/10 13:391 dc 12116/1016:071 cp 12116/1016:071 cp 11/30/10 12:15 IIr 11/24/10 10:50 IIr 11/23/10 16:45 IIr 12122110 12:32/ sml 12122110 12:32/ sml 12122110 12:32/ sml 12122110 12:32 I sml 12122110 12:32 I sml 12122110 12:32 I sml 12116/1016:07/ cp 12122110 12:32 I sml 12122110 12:32 I sml 12122110 12:32 I sml 12122110 12:32 I sml 12122110 12:32 I sml 12122110 12:32 I sml 12122110 12:32 I sml 12122110 12:32 1 sml 1212211012:32/ sml 1212211012:32 I sml 12122110 12:321 sml 12122110 12:32/ sml 12102110 12:45 I ep 12/02110 12:45/ ep 12102110 12:45 / ep Page 9 of 36 EN:RGY 1\"-tl'Hf'·I L'f<l\ ~ www.enerRYIab.com AIIfyIIaI fJaIIfM:I smc. '151 Helena, MT 811-472-0711 • Billings, MT 800-735-4489 • Caspar, WV 888-235-0515 Gillette, WY 866-686-7175 • Rapid City, SD 888-672-1225 • College Station,1X 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp Semi-Annual Groundwater 2010 C1 011 0844-004 Client Sample 10: MW 18 Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TOS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-0ichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. Result -2.77 49.0 46.4 3090 0.980 ND ND NO ND ND NO NO ND ND NO 101 100 98.0 99.0 Units % meq/l meq/l mg/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l %REC %REC %REC %REC Qualifiers Rl 20 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 80-120 70-130 80-120 80-120 Report Date: 01/06/11 Collection Date: 11/18/1 0 11 :40 DateReceived: 11/23/10 Matrix: Aqueous MCll QCl Method Analysis Date I By Calculation 12123/1007:181 kbh Calculation 12123/10 07:18 1 kbh Calculation 12123/10 07:18 1 kbh Calculation 12123/10 07:181 kbh Calculation 12123/10 07:181 kbh SW8260B 12101/10 17:151 ilr SW8260B 12101/1017:151 ilr SW8260B 12101/1017:151 ilr SW8260B 12101/1017:151 ilr SW8260B 12101/1017:151 ilr SW8260B 12101/1017:151 ilr SW8260B 12101/1017:151 ilr SW8260B 12101/1017:151 ilr SW8260B 12101/1017:151 ilr SW8260B 12101/10 17:15/ilr SW8260B 12101/1017:151 ilr SW8260B 12101/10 17:151 ilr SW8260B 12101/1017:151 ilr SW8260B 12101/1017:151 ilr MCl -Maximum contaminant level. NO -Not detected at the reporting limit. Page 10 of 36 A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter -Semiannual Groundwater 1011452-005A Client Sample ID: MW-19 Collection Date: 11118/2010 1450h Received Date: Method Used: 11123120101025h SW8260C Contact: Jo Ann Tischler Analyzed: 11124/2010 2045h Analytical Results VOAs by GC/MS Method 8260C/S030C Units: J.Lg/L Dilution Factor: 1 Compound Tetrahydrofuran SUIT: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 111 80-123 108 80-124 101 80-125 98.4 Report Date: 11/29/2010 Page 8 of27 All analyses applicable to the CWA. SDWA, and ReRA arc perfonned in accordance to NELAC protocols. Pertinent sampling infonnalion is Located on the attached COCo This report. is provided for the exclusive use crthe addressee. Privileges of subsequent use of the name of this company or any member cfits staff, or reproduction of this report in connection wilh the advertisement, promo Lion or sale of any product OT process, or in connection with the re-publication of this report for any purpose other than for the addressee will be granted only on contacL. This company accepts no responsibility except for the due performance of inspection and/or analysis in good faith and according to the rules of the trade and of science. EN:RGY l/\dOI )/\I OI-l1 .-, www.energylab.com AIIIfyIIaI £mIJBu SIJru 1m Helena, MT 871·472·0111 • Billings, MT 800·135·4489 . Casper, WY 888-235-0515 Gillotte, WY 86&-6B6· 7175 • Rapid City, SD IIB·&72-1225 • College StatiDn, TX 888·690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 LablD: C1 011 0844-005 Client Sample ID: MW 19 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS -DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLlDES· DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Report Defin itions: RL -Analyte reporting limit. QCL -Quality control limit. Result ND 271 152 25 1.00 49.5 ND 2.4 4.2 98.9 552 7.77 1010 ND ND ND ND ND ND ND ND ND ND ND ND 10.8 ND ND ND 6.48 ND ND 1.2 0.7 0.8 Units mg/l mg/l mg/l mg/l mg/l mg/l mg/l mg/L mg/L mg/L mg/L S.u. mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L pCilL pC ilL pC ilL MDC -Minimum detectable concentration Report Date: 01/06/11 Collection Date: 11/18/10 14:50 DateReceived: 11/23/10 Matrix: Aqueous MCl! Qualifiers Rl QCl Method Analysis Date! By D D D A2320 B 11/23/1019:471 jba A2320 B 11/23/1019:471 jba 0.5 E200.7 12128/10 15:241 cp A4500-CI B 12115/10 15:18 IImc 0.10 A4500-F C 12101/10 10:05 1 jba 0.5 E200.7 12128/10 15:241 cp 0.05 A4500-NH3 G 11/29/1013:231 dc 0.2 E353.2 11/24/1013:421 dc 0.5 E200.7 12128/10 15:241 cp 0.6 E200.7 12128/10 15:241 cp 10 A4500-S04 E 11/30/10 12:18 IIr 0.01 A4500-H B 11/24/10 10:56/1r 10 A2540 C 11/23/10 16:45 IIr 5.0 E200.8 12122110 12:391 sml 0.50 E200.8 12122110 12:391 sml 0.50 E200.8 12122110 12:391 sml 25 E200.8 12122110 12:391 sml 10 E200.8 12122110 12:391 sml 10 E200.8 12122110 12:391 sml 30 E200.7 12116/1016:111 cp 1.0 E200.8 12122110 12:391 sml 10 E200.8 12122110 12:391 sml 0.50 E200.8 12122110 12:391 sml 10 E200.8 12122110 12:39/sml 20 E200.8 12122110 12:39 1 sml 5.0 E200.8 12122110 12:391 sml 10 E200.8 12122110 12:391 sml 0.50 E200.8 12122110 12:391 sml 100 E200.8 12122110 12:391 sml 0.30 E200.8 12122110 12:391 sml 15 E200.8 12/22110 12:39/sml 10 E200.8 12/22/1012:391 sml E900.1 12102110 12:451 ep E900.1 12102110 12:451 ep E900.1 12/02110 12:451 ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 11 of 36 EN:RGY f\1-i()I.j\ I ( jf JI ", www.energylab.com A/IIIJfIaI EIRIIItIH SbIu IW Helena, MT 817-472-0711 • Billings, MT 800-735-4489 • Casper, 'NY 888-235-0515 Gillette, WV 886-686-7175 • Rapid City, SD 888-672-1225 • College Station, 1X 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp Semi-Annual Groundwater 2010 C1 011 0844-005 Client Sample 10: MW 19 Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result -2.53 16.9 16.0 1040 0.970 ND ND ND ND ND ND ND ND ND ND 98.0 106 97.0 98.0 Units % meq/L meq/L mg/L ug/L ug/L ug/l ug/L ug/L ug/L ug/L ug/L ug/L ug/L %REC %REC %REC %REC Qualifiers Rl 20 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 80-120 70-130 80-120 80-120 Report Date: 01/06/11 Collection Date: 11/18/10 14:50 DateReceived: 11/23/10 Matrix: Aqueous MCL! QCl Method Analysis Date 1 By Calculation 01/05/11 10:201 kbh Calculation 01/05/11 10:201 kbh Calculation 01/05/11 10:201 kbh Calculation 01/05/11 10:201 kbh Calculation 01/05/11 10:201 kbh SWB260B 12101/10 17:51 1 ilr SW8260B 12101/10 17:51 1 ilr SW8260B 12101/1017:511 ilr SW8260B 12101/10 17:51 1 ilr SW8260B 12101/1017:511 jlr SW8260B 12101/1017:51/ jlr SW8260B 12101/1017:511 jlr SW8260B 12101110 17:51 / jlr SW8260B 12101/1017:511 jlr SW8260B 12101/1017:51/ jlr SW8260B 12101/1017:511 jlr SWB260B 12101/1017:511 jlr SWB260B 12101/1017:51/ jlr SW8260B 12101/1017:51/jlr MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 12 of 36 A AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter Semi Annual Ground Water 1011479-002A Client Sample ill: MW-20 Collection Date: 1112212010 1245h Received Date: Method Used: 11/24/2010 1040h SW8260C Contact: Jo Ann Tischler Analyzed: 11/27/2010 1611h Analytical Results VOAs by GC/MS Method 8260C/S030C Units: J.Lg/L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 111 80-123 107 80-124 103 80-125 99.7 Report Date: 121712010 Page 5 of21 All analyses applicable to the CW A, SDWA, and RCRA arc perfonned in accordance to NELAC protocols. Pertinent sampling information is located on the attached COCo This report is provided for the exclusive usc of the addressee. Privileges of subsequent usc of the name of this company or any member of its staff, or reproduction of lhis reporl in connection with the advertisement, promotion or sale of any product or process, or in connection wit~ the rc.--publication of th~s repOrl_ for a?y purpose olher than for the addressee will be granted only on contact. Thjs company accepts no responsibility except for thc due perfonnance of inspection and/or analysis in good faith EN:RGY :~ . ..,. ~) I. /\ I ( I ~ I •. www.energytab.com AMI1fIcM £xuIIau SIm:I rm Helen., MT 877·412·0711 • Billings, MT 800·735·4489 • Casper, WV 881-235-0515 Gillette, WY 86&-686·7175 • Rapid City, SD 818·&72·1225 • College Station, 1X 881-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 LablD: C1 011 0870-002 Client Sample ID: MW20 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS· DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLlDES· DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result ND 226 330 64 0.36 85.2 0.10 6.8 44.5 1280 3570 8.08 5280 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 8.25 ND 24 2.8 1.0 Units mglL mg/L mg/L mg/L mg/L mg/L mglL mglL mglL mglL mglL S.u. mg/L ug/L ug/L uglL uglL uglL ug/L uglL uglL uglL uglL uglL uglL uglL uglL ug/L uglL ug/L ug/L uglL pC ilL pCi/L pCi/L MDC -Minimum detectable concentration Report Date: 12/30/10 Collection Date: 11/22/10 12:45 DateReceived: 11/24/10 Matrix: Aqueous MCU Qualifiers RL QCL Method Analysis Date 1 By D D D D D A2320 B 12101/1017:221 jba A2320 B 12101/10 17:221 jba E200.7 12109/10 12:51 1 cp 1 A4500-CI B 12115/10 15:29/1mc 0.10 A4500-F C 12101/10 11 :20 1 jba 0.5 E200.7 12109/10 12:51 1 cp 0.05 A4500-NH3 G 11/29/1013:551 dc 0.5 E353.2 11/24/1014:271 dc 0.5 E200.7 12109/10 12:51 1 cp E200.7 12109/10 12:51 1 cp 50 A4500-S04 E 11/30/10 12:31 IIr 0.01 A4500-H B 11/24/10 14:4311r 16 A2540 C 11/24/10 16:04 IIr 5.0 E200.8 12117/1002:551 sml 0.50 E200.8 1212211013:001 sml 0.50 E200.8 12122110 13:00 1 sml 25 E200.8 12117/10 02:551 sml 10 E200.8 12117/10 02:551 sml 10 E200.8 12122110 13:00 1 sml 30 E200.7 12109/10 12:51 1 cp 1.0 E200.8 12123/10 14:40 1 sml 10 E200.8 12117/10 02:551 sml 0.50 E200.8 12123/10 14:401 sml 10 E200.8 1212211013:001 sml 20 E200.8 12117/10 02:551 sml 5.0 E200.8 12117/1002:551 sml 10 E200.8 12123/1014:401 sml 0.50 E200.8 12123/10 14:40 1 sml 100 E200.8 12123/10 14:401 sml 0.30 E200.8 12123/10 14:401 sml 15 E200.8 12117/10 02:551 sml 10 E200.8 12123/1014:401 sml E900.1 12102110 09:381 ep E900.1 12102110 09:38 1 ep E900.1 12102110 09:38 1 ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 5 of 27 EN:RGY f\ ',' )1· ,\ I ' ,ll ' www.enerRYIab.com AM/ybI ExuIIIta SIlIa ,az Halena, MT 877-472-0711 • Bllllnll!, MT 800-735-4489 • Calper, WV 888-235-0515 Gillette, WV 88~8B8-7175 • Rapid City, SD 888-172-1225 • Collells Station, 1X 881-698-221 B LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: LablD: Denison Mines USA Corp Semi-Annual Groundwater 2010 C1 011 0870-002 Client Sample ID: MW 20 Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result 0.0160 80.4 80.4 5560 0.950 NO NO NO NO NO NO NO NO 4.6 3.4 96.0 105 97.0 99.0 Units % meqll meqll mg/l ug/L uglL uglL uglL uglL uglL uglL uglL uglL uglL %REC %REC %REC %REC Qualifiers Rl 20 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 80-120 70-130 80-120 80-120 Report Date: 12/30/10 Collection Date: 11/22/1012:45 DateReceived: 11/24/10 Matrix: Aqueous MCU QCl Method Analysis Date 1 By Calculation 12116/1007:161 kbh Calculation 12116110 07:161 kbh Calculation 12116/10 07:161 kbh Calculation 12116/10 07:161 kbh Calculation 12116/10 07:161 kbh SW8260B 12102110 00:31 1 jlr SW8260B 12102110 00:31 1 jlr SW8260B 1210211000:31 / jlr SW8260B 1210211000:31 / jlr SW8260B 1210211000:31 / jlr SW8260B 12102110 00:31 1 jlr SW8260B 12102110 00:31 1 jlr SW8260B 12102110 00:31 1 jlr SW8260B 1210211000:311 jlr SW8260B 12102110 00:31 1 jlr SW8260B 12102110 00:31 1 jlr SW8260B 12102110 00:31 1 jlr SW8260B 12102110 00:31 1 jtr SW8260B 1210211000:31/ jlr MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 6 of 27 A AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, VT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter-Semiannual Groundwater 1011399-003A Client Sample ID: MW-22 Collection Date: 11116/2010 1235h Received Date: Method Used: 11/19/2010 1030h SW8260C Contact: Jo Ann Tischler Analyzed: 11122/2010 1000h Analytical Results VOAs by GCIMS Method 8260C/S030C Units: Ilg/L Dilution Factor: 1 Compound Tetrahydrofuran SUIT: 1,2-Dichloroethane-d4 SUIT: 4-Bromofluorobenzene SUIT: Dibromofluoromethane SUIT: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 121 80-123 104 80-124 103 80-125 93.7 Report Date: 1112312010 Page 6 of25 All analyses appJicabJe to the CWA, SDWA, and ReRA are performed in accordance to NELAC protocols. Pertinent sampling infonnalion is located on the attached CDC. This report is provided for the exclusive use of the addressee. Privileges of subsequent use of the name of this company or any member of its staff, or reproduction of this report in connecLion with the advertisement, promotion or sale of any product or process, or in connection with the re-publication oflhis report. for any purpose other than for the addressee will be granted only on contact. This company accepts no responsibility except for the due perfonnance of inspection andlor analysis in good faith and according to the rules of the trade and of science. EN:RGY l\iIOll~'\r G'~1£ "; www.energylab.com AMIytIaI~ SIlo 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 Gillette, WY 86&-686-7175 • Rapid City, so 888-672-1225 • College Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Lab ID: C1 011 0730-003 Client Sample ID: MW 22 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS -DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLIDES -DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result ND 565 449 65 2.95 890 0.27 0.3 22.6 252 4890 6.41 7130 ND 2.22 86.7 ND 281 ND 41 ND 28500 ND 698 132 8.8 ND 1.00 ND 44.9 ND 485 2.2 0.2 0.1 Units mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L s.u. mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/l ug/l ug/l ug/L ug/L ug/L ug/L ug/l ug/l pC ill pC ilL pC ilL MOC -Minimum detectable concentration Report Date: 12/30/10 Collection Date: 11/16/10 12 :35 DateRecelved: 11/19/10 Matrix: Aqueous MCL! Qualifiers Rl QCl Method Analysis Date I By D D D D A2320 B 11/19/1017:001 jba A2320 B 11/19/10 17:00 I jba E200.7 12/06/10 12:531 cp 1 A4500-CI B 11/23/1011:11 Ilr 0.10 A4500-F C 11/22/10 11 :27 I jba 0.5 E200.7 12/06/1012:53 I cp 0.05 A4500-NH3 G 11/29/10 12:391 dc 0.1 E353.2 11/23/10 13:14 I dc 0.5 E200.7 12/06/10 12:53 I cp 1 E200.7 12/06/10 12:53 I cp 100 A4500-S04 E 11/30/10 11 :46 I Ir 0.01 A4500-H B 11/19/1015:5111jl 17 A2540 C 11/19/1014:48 I Ijl 5.0 E200.8 11/30/10 04:53 I sml 0.50 E200.8 11/30/10 04:531 sml 0.50 E200.8 11/30/10 04:53 I sml 25 E200.8 11/30/10 04:53 I sml 10 E200.8 11/30/10 04:53 I sml 10 E200.8 11/30/10 04:53 I sml 30 E200.7 12/06/10 12:53 I cp 1.0 E200.8 11/30/10 04:53 I sml 10 E200.8 11/30/10 04:53 I sml 0.50 E200.8 11/30/1004:53 I sml 10 E200.8 11/30/1004:53 I sml 20 E200.8 11/30/10 04:53 I sml 5.0 E200.8 11/30/1004:53 I sml 10 E200.8 11/3011 0 04:53/sml 0.50 E200.8 11/30/1004:53 I sml 100 E200.8 11/30/1004:53 I sml 0.30 E200.8 11/30/1004:53 I sml 15 E200.8 11/30/1004:53 I sml 10 E200.8 11/30/10 04:53 I sml E900.1 02/23/11 05:24 I ep E900.1 02/23/11 05:24 I ep E900.1 02123/11 05:24 I ep MCl -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 7 of 34 EN:RGY • ,'\UonA, C.HIL~J www.energylab.com AMIytkM rxun-. SItIu 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gilletta, WY 886-886-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/30/10 Collection Date: 11/16/10 12:35 DateRecelved: 11/19/10 Matrix: Aqueous Client: Project: Lab 10: Denison Mines USA Corp Semi-Annual Groundwater 2010 C1 011 0730-003 Client Sample 10: MW 22 Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: DibromofJuoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyle reporting limit. QCL -Quality control limit. Result -2.66 113 107 6860 1.04 ND ND ND ND ND ND ND ND ND ND 108 113 94.0 101 MCL! Units Qualifiers Rl QCl Method Analysis Date 1 By % Calculation 12/16/10 07:081 kbh meq/L Calculation 12116/10 07:08 1 kbh meq/L Calculation 12/16/10 07:08 1 kbh mg/L Calculation 12/16/10 07:08 1 kbh Calculation 12/16/10 07:08 1 kbh ug/L 20 SW8260B 11/24/1001 :261 rmh ug/L 1.0 SW8260B 11/24/1001 :261 rmh ug/L 1.0 SW8260B 11/24/10 01 :261 rmh ug/L 1.0 SW8260B 11/24/1001 :261 rmh ug/L 1.0 SW8260B 11/24/10 01 :26 1 rmh ug/L 20 SW8260B 11/24/10 01 :26 1 rmh ug/L 1.0 SW8260B 11/24/10 01 :26 1 rmh ug/L 1.0 SW8260B 11/24/1001 :261 rmh ug/L 1.0 SW8260B 11/24/10 01 :261 rmh ug/L 1.0 SW8260B 11/24/1001 :261 rmh %REC 80-120 SW8260B 11/24/1001 :26 1 rmh %REC 70-130 SW8260B 11/24/1001 :261 rmh %REC 80-120 SW8260B 11/24/10 01 :261 rmh %REC 80-120 SW8260B 11/24/1001 :26 1 rmh MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 8 of 34 A AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter Semi Annual Ground Water 10 11479-003A Client Sample ID: MW-23 Collection Date: 11122/20101030h Received Date: Method Used: 11/24/2010 1 040h SW8260C Contact: Jo Ann Tischler Analyzed: 11127/2010 2152h Analytical Results VOAs by GC/MS Method 8260CIS030C Units: J.Lg/L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromotluorobenzene Surr: Dibromotluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4. 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 110 80-123 107 80-124 103 80-125 99.2 Report Date: 12n12010 Page6of21 All analyses applicablc to the CWA, SDWA, and RCRA are perfonned in accordance to NELAC protocols_ Pertinent sampling infonn"tion is located on the atlachcd COCo This report is provided for the exclusive usc of the addressee. Privileges of subsequent usc oflhe name of this company or any member of its slafr, or reproduction of this report in connection with the advertisement, promotion or sale orany product or process, or in connection wit.h the rc.:public~Lion .of lh!s ,report. for any purpose olher than for the addressee will be granted only on contact. This company accepts no responsibilily except for the due performance of inspection and/or analysis in goad faith EI\ERGY ,,' \!)I /1 I ' j.J • www.energylab.com Aufyt/I:M EtuIMIf:t smc. rm Helena, MT 877·472-0111 • Billings, MT 800·735-4489 . Casper, WY 888-235-0515 Gillette, WY 86&-686·7175 • Rapid City, SD 818-&72-1225 • College Station, 1X 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 LablD: C1 011 0870-003 Client Sample ID: MW23 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS -DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLlDES· DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Report Defln Itlons: RL -Analyte reporting limit. QCL -Quality control limit. Result ND 309 440 9 0.23 144 ND 0.2 9.9 374 2280 8.00 3560 ND ND NO NO ND ND ND ND 65 ND ND ND ND NO 0.51 ND 12.5 ND 15 1.8 0.9 1.0 Units mglL mg/L mglL mg/L mg/L mg/L mglL mg/L mglL mglL mglL S.u. mglL uglL ug/L uglL uglL uglL ug/L uglL ug/L uglL ug/L ug/L uglL uglL uglL uglL uglL uglL uglL uglL pCi/L pCi/L pCi/L MDC -Minimum detectable concentration Report Date: 12/30110 Collection Date: 11/22/10 10:30 DateReceived: 11/24/10 Matrix: Aqueous MCL! Qualifiers RL QCL Method Analysis Date 1 By D 0 0 A2320 B 12101/10 17:30/jba A2320 B 12101/10 17:30 I jba E200.7 12109/10 12:55/cp A4500-CI B 12115/10 15:31 IImc 0.10 A4500-F C 12101/10 11 :22 I jba 0.5 E200.7 12109/10 12:551 cp 0.05 A4500-NH3 G 11/29/1013:571 dc 0.1 E353.2 11/24/10 14:37 I dc 0.5 E200.7 12109/10 12:55 I cp E200.7 12109/10 12:551 cp 50 A4500-S04 E 11/30/10 12:35 IIr 0.01 A4500-H B 11/24/10 14:54 IIr 10 A2540 C 11/24/10 16:0511r 5.0 E200.8 12117/1003:021 sml 0.50 E200.8 1212211013:271 sml 0.50 E200.8 1212211013:27 I sml 25 E200.8 12117/1003:021 sm! 10 E200.8 12117/10 03:021 sml 10 E200.8 1212211013:27 I sml 30 E200.7 12109/10 12:55 I cp 1.0 E200.8 12123/1014:471 sml 10 E200.8 12117/10 03:021 sml 0.50 E200.8 12123/1014:471 sml 10 E200.8 12122110 13:271 sml 20 E200.8 12117/10 03:021 sml 5.0 E200.8 12117/10 03:021 sm! 10 E200.8 12123/10 14:47 I sml 0.50 E200.8 12123/1014:471 sm! 100 E200.8 12123/1014:471 sml 0.30 E200.8 12123/1014:471 sml 15 E200.8 12117/1003:021 sml 10 E200.8 12123/1014:471 sml E900.1 12102110 09:381 ep E900.1 12102110 09:381 ep E900.1 12102110 09:38 I ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 7 of 27 EN:RGY I ,,~),-11, .. "01 '.'1'/, ., www.energylab.com AtuIytIaI ~ SInu raz Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillatta, WV 88&-888-7175 • Rapid City, SD 818-672-1225 • College Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp Semi-Annual Groundwater 2010 C1 011 0870-003 Client Sample 10: MW23 Analyses DATA QUALITY Ale Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: Rl -Analyte reporting limit. aCl -Quality control limit. Result -2.34 52.7 50.3 3420 1.04 ND ND ND ND ND ND ND ND ND ND 102 102 104 98.0 Units % meq/L meqlL mg/L ug/L uglL uglL uglL ugll ug/l ugll ug/l ugll ugll %REC %REC %REC %REC Qualifiers RL 20 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 80-120 70-130 80-120 80-120 Report Date: 12/30/1 0 Collection Date: 11/22/10 10:30 DateReceived: 11/24/1 0 Matrix: Aqueous MCU QCL Method Analysis Date 1 By Calculation 12116/10 07:161 kbh Calculation 12116/10 07:161 kbh Calculation 12116/10 07:161 kbh Calculation 12116/10 07:161 kbh Calculation 12116/10 07:161 kbh SW8260B 12101/10 19:401 jlr SW8260B 12101/1019:401 jlr SW8260B 12101/10 19:401 jlr SW8260B 12101/10 19:401 jlr SW8260B 12101/10 19:401 jlr SW8260B 12101/10 19:401 jlr SWB260B 12101/10 19:401 jlr SWB260B 12101110 19:401 jlr SWB260B 12101/10 19:40 1 jlr SW8260B 12101/1019:401 jlr SW8260B 12101/10 19:40 1 jlr SW8260B 12101/10 19:401 jlr SW8260B 12101/10 19:401 jlr SWB260B 12101/10 19:401 jlr MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 8of27 A AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter-Semiannual Groundwater 1011399-004A Client Sample ID: MW-24 Collection Date: 11117120100845h Received Date: Method Used: 11/19/2010 1030h SW8260C Contact: Jo Ann Tischler Analyzed: 11122/2010 1019h Analytical Results VOAs by GC/MS Method 8260C/S030C Units: IlgIL Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 121 80-123 105 80-124 103 80-125 94.9 Report Date: 11123/2010 Page 7 of25 All analyses applicable to the CWA. SDWA, and RCRA are perfonned in accordance to NELAC prolocols. Pertinent sampling information is located on the attached COCo This report is provided for the exclusive use of the addressee. Privileges of subsequent use of the name of this company or any member of hs starr, or reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection with the re-publication of this report for any purpose other than for the addressee will be granted only on contact. This company accepts no responsibility except for the due perfonnance of inspection and/or analysis in good faith and according to the rules of the trade and of science. EN:RGY /d ,OI~..\·IOnl~ ~,; www.anergyiab.com AM/ytkttI~st.u 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 GilieHe, WY 88&-586-7175 • Rapid City, SD 888-&72-1225 • College Station, IX 118-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Lab ID: C1 011 0730-004 Client Sample ID: MW 24 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS@ 180 C METALS -DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLIDES -DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result ND 197 478 48 0.18 173 0.71 2.7 12.B 475 2760 7.43 4200 ND ND 3.22 ND ND ND 198 ND 4480 ND ND 33 ND ND 1.09 ND 1.44 ND 56 0.1 0.07 0.1 Units mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L s.u. mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L pCilL pCi/L pCi/L MDC -Minimum detectable concentration U -Not detected at minimum detectable concentration Report Date: 12/30/10 Collection Date: 11/17/1008:45 DateReceived: 11/19/10 Matrix: Aqueous MCL! Qualifiers RL QCL Method Analysis Date I By D D D D D U 1 A2320 B 11/19/1017:081 jba 1 A2320 B 11/19/10 17:08 I jba ·1 E200.7 12/06/10 13:10/cp t A4500-CI B 11/23/10 11 :15 /lr 0.10 A4500-F C 11/22/1011:31/jba 0.5 E200.7 12/06/10 13:10 I cp 0.05 A4500-NH3 G 11/29/1012:41/dc 0.2 E353.2 11/23/1013:171 dc 0.5 E200.7 12/06/10 13:10 I cp 1 E200.7 12106/1013:10 I cp 50 A4500-S04 E 11/30/10 11 :48 1 Ir 0.01 A4500·H B 11/19/10 16:04/1jl 11 A2540 C 11/19/10 14:49 /ljl 5.0 E200.B 11/30/1005:00 I sml 0.50 E200.B 11/30/1005:00 I sml 0.50 E200.B 11/30/1005:00/sml 25 E200.B 11/30/1005:001 sml 10 E200.B 11/30/1005:001 sml 10 E200.8 11/30/10 05:001 sml 30 E200.7 12106/10 13:10 I cp 1.0 E200.B 11/30/1005:001 sml 10 E200.B 11/30/1005:001 sml 0.50 E200.8 11/30/1005:00 I sml 10 E200.8 11/30/10 05:00 I sml 20 E200.8 11/30/1005:00 I sml 5.0 E200.8 11/30/1005:00 I sml 10 E200.8 11/30/1005:001 sml 0.50 E200.B 11/30/10 05:001 sml 100 E200.8 11/30/10 05:00 I sml 0.30 E200.8 11/30/10 05:00 I sml 15 E200.8 11/30/1005:00 I sml 10 E200.8 11/30/10 05:00 I sml E900.1 02/23/11 05:241 ep E900.1 02/23/11 05:241 ep E900.1 02/23/11 05:241 ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 9 of 34 EN:RGY . I\I:-;on/~I O~~lL~3 www.energylab.com AuIybIEzuIIHt:I s..IIU Helena, MT 877-472-0711 • Billings, MT 800-135-4489 . Casper, WY 888-235-0515 Gillette, WY 8&&-&8&-7175 • Rapid City, SD 888-612-1225 • College Slallon, IX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/3011 0 Collection Date: 11/17/10 08:45 DateReceived: 11/19/10 Matrix: Aqueous Client: Project: LablD: Denison Mines USA Corp Semi-Annual Groundwater 2010 C1 011 0730-004 Client Sample ID: MW 24 Analyses DATA QUALITY NC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result -2.49 62.2 59.1 4070 1.03 ND ND ND ND ND ND ND ND ND ND 108 108 98.0 96.0 MCL! Units Qualifiers RL QCL Method Analysis Date 1 By % Calculation 12/16/10 07:08 1 kbh meq/L Calculation 12/16/10 07:08 1 kbh meq/L Calculation 12/16/10 07:08 1 kbh mg/L Calculation 12/16/10 07:08 1 kbh Calculation 12/16/10 07:08 1 kbh ug/L 20 SW8260B 11/24/1002:021 rmh ug/L 1.0 SW8260B 11/24/1002:021 rmh ug/L 1.0 SW8260B 11/24/1002:021 rmh ug/L 1.0 SW8260B 11/24/1002:021 rmh ug/L 1.0 SW8260B 11/24/1002:021 rmh ug/L 20 SW8260B 11/24/10 02:021 rm h ug/L 1.0 SW8260B 11/24/10 02:021 rmh ug/L 1.0 SW8260B 11/24/1002:021 rmh ug/L 1.0 SW8260B 11/24/1002:021 rmh ug/L 1.0 SW8260B 11/24/10 02:021 rmh %REC 80-120 SW8260B 11/24/1002:021 rmh %REC 70-130 SW8260B 11/24/1002:021 rmh %REC 80-120 SW8260B 11/24/1002:021 rmh %REC 80-120 SW8260B 11/24/1002:021 rmh MCl -Maximum contaminant level. NO -Not detected at the reporting limit. Page 10 of 34 A AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter-Semiannual Groundwater 1011246-002A Client Sample ID: MW-25 Collection Date: 1111012010 1220h Received Date: 11112120101000h Method Used: SW8260C Contact: Jo Ann Tischler Analyzed: 11117/2010 1216h Analytical Results VOAs by GCIMS Method 8260CIS030C Units: J.1g/L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 104 80-123 105 80-124 99.0 80-125 99.5 Report Date: 11/19/2010 Page 5 oC15 All a.nalyses applicable to the CWA, SDWA, and ReRA are perfonncd in accordance to NELAC proLocols. Pertinent sampling inronnalion is located on the attached COCo This report is provided for the exclusive use oflhe addressee, Privileges of subsequent use oftbe name of this company or any member ofils stafr, or reproduction oflhis report in connection with the advertisement, promotion or sale of any product or process, or in connection with the re-publication of this report Cor any purpose other than for the addressee will be granted only on conlacl. This company accepts no responsibility except for the due perfonnance oCinspeclion and/or analysis in good faith and according to the rules of the trade and of science. EN:RGY .\ Ic}'./\ICI-rr; ~;, www.energylab.com AM/JfJoI Ezc.-a -. 1m Helena, lIfT 877-412-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 GilleItJI, WY 88&-186-7115 • Rapid City, so 888-672-1225 • CD liege Station, TX 888-610-221 B LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch ReVised Date: 02/23/11 Report Date: 12/29/10 Collection Date: 11/10/1012:20 DateRecelved: 11/12/10 Matrix: Aqueous Client: Denison Mines USA Corp Project: Lab ID: 4th Quarter-Semi-Annual Groundwater C1 011 0505-002 Client Sample ID: MW 25 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS -DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLIDES -DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result Units ND mg/L 413 mg/L 354 mg/L 31 mg/L 0.31 mg/L 116 mg/L 0.56 mg/L ND mg/L 9.3 mg/L 277 mglL 1650 mglL 7.37 s.u. 2800 mg/L ND ug/L ND ug/L 1.26 ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L 1530 ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L 0.86 ug/L ND ug/L 5.89 ug/L ND ug/L ND ug/L 0.7 pCi/L 0.1 pC ilL 0.1 pCi/L MDC -Minimum detectable concentration MCU Qualifiers Rl QCl Method Analysis Date 1 By D D D A2320 B 11/13/10 02:00 1 jba A2320 B 11/13/10 02:00 1 jba E200.7 12/01/10 15:241 cp 1 A4500-CI B 11/16/1009:22/1r 0.10 A4500-F C 11/12/1013:161 jba 0.5 E200.7 12/01/10 15:241 cp 0.05 A4500-NH3 G 11/17/10 16:06/dc 0.1 E353.2 11/12110 16:07 1 dc 0.5 E200.7 12/01/10 15:241 cp E200.7 12101/10 15:24/cp 50 A4500-S04 E 11/16/10 13:49/1r 0.01 A4500-H B 11/12/10 15:101lr 10 A2540 C 11/12/10 15:09/1r 5.0 E200.8 11/20/1008:291 sml 0.50 E200.8 11/20/1008:291 sml 0.50 E200.8 11/20/10 08:291 sml 25 E200.8 11/20/1008:291 sml 10 E200.8 11/20/1008:29 1 sml 10 E200.8 11/20/10 08:29 1 sml 30 E200.7 12/01/1015:241 cp 1.0 E200.8 11/20/10 08:29 1 sml 10 E200.8 11/20/10 08:29 1 sml 0.50 E200.8 11/20/10 08:29 1 sml 10 E200.8 11/20/10 08:29 1 sml 20 E200.8 11/20/10 08:291 sml 5.0 E200.8 11/20/1008:291 sml 10 E200.8 11/30/1002:011 sml 0.50 E200.8 11/20/1008:291 sml 100 E200.8 11/20/1008:291 sml 0.30 E200.8 11/20/1008:29/sml 15 E200.8 11/20/1008:29 1 sml 10 E200.8 11/20/1008:291 sml E900.1 02/22/11 22:321 ep E900.1 02/22111 22:32 1 ep E900.1 02/22111 22:32 1 ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 5 of 38 EN:RGY ... ~,,~(}J ... \rOI H_~. www.energylab.com AAI/ffkI/ fiuIIMJu S/WU IJ!t Halena, MT 877-472-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 Gillette, WY 866-686-7175 • Rapid City, SD 888-&72-1225 • College Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/29/10 Col/ection Date: 11/10/10 12:20 DateReceived: 11/12/10 Matrix: Aqueous Client: Denison Mines USA Corp Project: Lab ID: 4th Quarter-Semi-Annual Groundwater C1 011 0505-002 Client Sample ID: MW 25 Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result Units -3.11 % 42.1 meq/L 39.5 meq/L 2650 mg/L 1.06 ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L 108 %REC 99.0 %REC 101 %REC 104 %REC MCL! Qualifiers RL QCL Method Analysis Date 1 By Calculation 12/05/10 11 :13 1 kbh Calculation 12/05/10 11 :13 1 kbh Calculation 12/05/10 11 :13 1 kbh Calculation 12/05/10 11 :13 1 kbh Calculation 12/05/10 11 :13 1 kbh 20 SW8260B 11/19/1015:551 rmh 1.0 SW8260B 11/19/1015:551 rmh 1.0 SW8260B 11/19/1015:551 rmh 1.0 SW8260B 11/19/1015:551 rmh 1.0 SW8260B 11/19/10 15:55/rmh 20 SW8260B 11/19/10 15:55/rmh 1.0 SW8260B 11/19/1015:551 rmh 1.0 SW8260B 11/19/10 15:55/rmh 1.0 SW8260B 11/19/10 15:55/rmh 1.0 SW8260B 11/19/1015:551 rmh 80-120 SW8260B 11/19/10 15:55/rmh 70-130 SW8260B 11/19/1015:551 rmh 80-120 SW8260B 11/19/10 15:55/rmh 80-120 SW8260B 11/19/10 15:551 rmh MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 6 of 38 A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, VT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter-Semiannual Groundwater 1011399-005A Client Sample ID: MW-26 Collection Date: 11115/2010 1302h Received Date: Method Used: 11119/2010 1030h SW8260C Contact: Jo Ann Tischler Analyzed: 11122/2010 1038h Analytical Results VOAs by GCIMS Method 8260CI5030C Units: ~gIL Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 SUIT: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 121 80-123 105 80-124 106 80-125 95.4 Report Date: 11123/2010 Page 8 of25 All analyses a.pplicable to the CW A, SDWA, and ReRA are performed in accordance to NELAC protocols. Pertinent sampling infoJIJIalion is located on the attached CDC, This report is provided for the exclusive use ofthe addressee. Privileges of subsequent use of the name or this company or any member of its staff, or reproduction orlhis report in connection with the advertisement, promotion or sllie of any product or process, or in connection with the re-publiclltion oflhis report for Ilny purpose other than for the addressee wiJl be gmnted only on contact. This company accepts no responsibility except for the due performance of inspection a.ndlor analysis in good failh a.nd according to the rules of the trade and oCscience. EN:RGY . I\lJon~,\l C l llt'-; www.energylab.com AM/yIIaI EmIIfta SIIIu 1m Halana, MT 877-472-0711 • Billings, MT 80D-735-4489 • Casper, WY 888-235-0515 Gilletts, WY 866-188-7175 • Rapid City, so 888-&72-1225 • College Station, lX 888-&90-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 LablD: C1 011 0730-005 Client Sample ID: MW 26 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS -DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLIDES -DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Report Definitions: RL -Analyte reporting limit. QCl -Quality control limit. Result ND 414 474 48 0.28 153 0.49 0.2 11.0 213 1880 7.61 3140 ND ND ND ND ND ND 278 ND 1080 ND ND ND ND ND ND ND 30.4 ND ND 2.2 0.2 0.1 Units mg/L mg/L mg/L mg/L mg/L mg/L mg/L mglL mg/L mglL mglL s.u. mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ugiL ug/L ug/L pC ilL pC ilL pC ilL MDC -Minimum detectable concentration Report Date: 12/30/10 Collection Date: 11/15/10 1 3 :02 DateReceived: 11/19/10 Matrix: Aqueous MCL! Qualifiers RL aCL Method Analysis Date I By 0 D D A2320 B 11/19/1017:16 I jba A2320 B 11/19/10 17: 16 I jba E200.7 12/06/10 13:14 I cp A4500-CI B 11/23/1011 :18/1r 0.10 A4500-F C 11/22110 11 :38 I jba 0.5 E200.7 12/06/10 13:141 cp 0.05 A4500-NH3 G 11/29/1012:431 dc 0.1 E353.2 11/23/10 13:191 dc 0.5 E200.7 12/06/10 13:14 I cp E200.7 12/06/1013:141 cp 50 A4500-S04 E 11/30/10 11 :55 /lr 0.01 A4500-H B 11/19/1016:11 Iljl 10 A2540 C 11/19/10 14:50/ljl 5.0 E200.8 11/30/10 05:07 I sml 0.50 E200.8 11/30/10 05:07 I sml 0.50 E200.B 11/30/1005:071 sml 25 E200.B 11/30/10 05:07 I sml 10 E200.B 11/30/1005:07 I sml 10 E200.B 11/3011005:071 sml 30 E200.7 12/06/10 13:14 I cp 1.0 E200.8 12/10/10 02:561 sml 10 E200.8 11/30/1005:071 sml 0.50 E200.8 12/23/10 14:12/sml 10 E200.8 11/30/1005:07 I sml 20 E200.8 11/30/1005:071 sml 5.0 E200.B 11/30/1005:07 I sml 10 E200.B 11/30/1005:071 sml 0.50 E200.8 12/10/10 02:56 I sml 100 E200.8 11/30/1005:07 I sml 0.30 E200.8 12/10/10 02:56 I sml 15 E200.8 11/30/10 05:07 I sml 10 E200.8 11/30/10 05:07 I sml E900.1 02123/11 05 :241 ep E900.1 02/23/11 05:241 ep E900.1 02/23/11 05:241 ep MCl -Maximum contaminant level. ND -Not detected at the reporting limit. D -Rl increased due to sample matrix. Page 11 of 34 EN:RGY ," ~) r " r ( ~ r ~:. " www.energylab.com AIIMytIa/ EXuIlMlCtl ShIu 1!152 Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 866-686-7175 • Rapid City, so 888-672-1225 • College Station, IX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Lab ID: C1 011 0730-005 Client Sample ID: MW 26 Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result -1.64 47.4 45.9 3000 1.05 ND ND ND 1900 ND ND 16 ND ND ND 106 108 98.0 98.0 D -RL increased due to sample matrix. Report Date: 12/30/10 Collection Date: 11/15/10 13:02 DateReceived: 11/19/10 Matrix: Aqueous MCL! Units Qualifiers Rl QCl Method Analysis Date 1 By % Calculation 12/16/10 07:081 kbh meq/l Calculation 12/16/10 07:08 1 kbh meq/L Calculation 12/16/10 07 :08 1 kbh mg/l Calculation 12/16/10 07:08 1 kbh Calculation 12/16/10 07:08 1 kbh ug/L 20 SW8260B 11/24/1005:441 rmh ug/L 1.0 SW8260B 11/24/1005:441 rmh ug/L 1.0 SW8260B 11/24/1005:441 rmh ug/L D 100 SW8260B 11/24/1005:071 rmh ug/L 1.0 SW8260B 11/24/1005:441 rmh ug/L 20 SW8260B 11/24/1005:441 rmh ug/L 1.0 SW8260B 11/24/10 05:441 rmh ug/L 1.0 SW8260B 11/24/10 05:441 rmh ug/L 1.0 SW8260B 11/24/10 05:441 rmh ug/L 1.0 SW8260B 11/24/1005:441 rmh %REC 80-120 SW8260B 11/24/1005:441 rmh %REC 70-130 SW8260B 11/24/1005:441 rmh %REC 80-120 SW8260B 11/24/10 05:441 rmh %REC 80-120 SW8260B 11/24/10 05:441 rmh MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 12 of 34 A AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter-Semiannual Groundwater 1011302-004A Client Sample ID: MW-27 Collection Date: 11112/2010 1220h Received Date: 11/16/20100945h Method Used: SW8260C Contact: Jo Ann Tischler Analyzed: 11/17/2010 1605h Analytical Results VOAs by GCIMS Method 8260C/5030C Units: IlgiL Dilution Factor: 1 Compound Tetrahydrofuran SUIT: 1,2-Dichloroethane-d4 SUIT: 4-Bromofluorobenzene SUIT: Dibromofluoromethane SUIT: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 112 80-123 107 80-124 102 80-125 98.0 Report Date: 11/2212010 Page 7 of!3 AU analyses applicable 10 the CWA, SDWA. and RCRA arc performed in accordance to NELAC protocols. Pertinent sampling information is located on the attached COCo This report is provided [or tho exclusive use of the addressee. Privileges of subsequent use of the name of this company or any member of its staff, or reproduction of this report in connection with Lhe advertisement, promotion or sale of Bny product or pro(;ess, or in connection wilh the re-publication of this report for any purpose other than for the addressee will be granted onLy on contact. This company accepts no responsibility except for the due perfonnance ofinspecLion endlor analysis in good faith and according to the rules of the trade and of science. EN:RGY . /\HOr-lI~ICI..lI~r:. www.energylab.com AM/yfIaI bull-. SIItu 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-8515 Gillette, WY 86&-686-7175 • Rapid City, SD 888-672-1225 • Collage Station, lX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/08/10 Collection Date: 11/12/10 12:20 DateRecelved: 11/16/10 Matrix: Aqueous Client: Project: LablD: Denison Mines USA Corp Semi Annual Groundwater Cl 011 0584-004 Client Sample ID: MW 27 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS -DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLIDES -DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result ND 459 167 45 0.68 72.1 ND 5.7 4.3 65.8 452 7.83 1110 NO NO ND ND NO ND ND NO NO ND ND ND 10.0 ND NO ND 27.7 ND ND 0.1 0.1 Units mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L s.u. mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L pCi/L pCilL pCi/L MDC -Minimum detectable concentration MCU Qualifiers Rl QCl Method Analysis Date I By D D D A2320 B 11/16/10 19:05 I jba 1 A2320 B 11/16/10 19:05/jba 0.5 E200.7 12/03/1015:41 I cp A4500-CI B 11/23/10 10:5911r 0.10 A4500-F C 11/17/10 11 :30 I jba 0.5 E200.7 12/03/1015:411 cp 0.05 A4500-NH3 G 11/17/10 16:44/de 0.5 E353.2 11/19/10 12:53 I de 0.5 E200.7 12103/1015:411 ep 0.6 E200.7 12103/1015:411 cp 10 A4500-S04 E 11/30/1011 :3611r 0.01 A4500-H B 11/16/1013:1111r 10 A2540 C 11/16/10 16:1511r 5.0 E200.B 11/20/1010:31 I sml 0.50 E200.B 11/20/1010:311 sml 0.50 E200.B 11/20/10 10:311 sml 25 E200.8 11/20/10 10:311 sml 10 E200.B 11/20/1010:31 I sml 10 E200.8 11/20/10 10:311 sml 30 E200.7 12103/10 15:41 I cp 1.0 E200.B 11/20/1010:31 I sml 10 E200.B 11/20/1010:31 I sml 0.50 E200.8 11/20/1010:311 sml 10 E200.8 11/20/1010:311 sml 20 E200.8 11/20/1010:31 I sml 5.0 E200.B 11/20/1010:31 I sml 10 E200.B 12/04/10 11 :44 I sml 0.50 E200.B 11/20/1010:311 sml 100 E200.8 11/20/1010:31 I sml 0.30 E200.8 11/20/1010:31/sml 15 E200.8 11/20/1010:311 sml 10 E200.8 11/20/1010:311 sml E900.1 02/22/11 22 :32 I ep E900.1 02/22/11 22 :32 I ep E900.1 02/22/11 22 :32 I ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 9 of 32 EI\ERGY l I\fjU l i/O I e : ,'::... ~ eE'· www.energylab.comHelena.MT877-472·0711 ·Billings.MT 800-735-4489 • Casper, WY 888-235-0515 ~ __ ~ ____ /n_·~_~ ___ ~ ___ '!U __ ~ _______ Gi_II~~B,_WY_8~1~&.~I~~~.7_1_75~._Ra~pi~d_C~~,~S_D~88~a~·6~72~.~12~2~5_._Co_lI~ag~8_St~at~ion~,~n~8~88~~~9~O_-2_21~a LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Project: Semi Annual Groundwater Lab 10: C1 011 0584-004 Client Sample 10: MW27 Analyses DATA QUALITY NC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result -3.97 18.6 17.2 1080 1.03 ND ND ND ND ND ND ND ND ND ND 107 134 106 108 Units % meq/L meq/L mglL ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L %REC %REC %REC %REC S -Spike recovery outside of advisory limits. Report Date: 12/08/10 Collection Date: 11/12/10 12:20 DateRecelved: 11/16/10 Matrix: Aqueous MCll Qualifiers Rl QCl Method Analysis Date 1 By Calculation 12105/1 0 11 :24 1 kbh Calculation 1210511 0 11 :24 1 kbh Calculation 12105/1 0 11 :24 1 kbh Calculation 12/0511 0 11 :24 1 kbh Calculation 12/05/10 11 :241 kbh 20 SW8260B 11/24110 02:45 1 rmh 1.0 SW8260B 11/24/10 02:45 1 rmh 1.0 SW8260B 11/24/10 02:451 rmh 1.0 SW8260B 11/24/1002:451 rmh 1.0 SW8260B 11/24110 02:45 1 rmh 20 SW8260B 11/24/1002:451 rmh 1.0 SW8260B 11/24/1002:451 rmh 1.0 SW8260B 11/24/1002:451 rmh 1.0 SW8260B 11/24/1002:451 rmh 1.0 SW8260B 11/24/1002:451 rmh 80-120 SW8260B 11/24/1002:451 rmh S 70-130 SW8260B 11 /24/1002:45 1 rmh 80-120 SW8260B 11 /24/10 02:45 1 rmh 80-120 SW8260B 11 /24/10 02:451 rmh MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 10 of 32 A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, VT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter-Semiannual Groundwater 1011302-005A Client Sample ID: MW-28 Collection Date: 11112/2010 1135h Received Date: Method Used: 1111612010 0945h SW8260C Contact: 10 Ann Tischler Analyzed: 11117/2010 1623h Analytical Results VOAs by GC/MS Method 8260C/S030C Units: 11g/L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dich1oroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 109 80-123 107 80-124 101 80-125 98.1 Report Date: 11122/2010 Page 8 of 13 All analyses applicable to the CWA, SDWA. and ReRA Brc perfonned in accordance to NELAC protocols. Pertinent sampling inronnation is located on the attached CDC. This report is provided for the exclusive use of the addressee. Privileges of subsequent use ofthe name of this company or any member of its statT, or reproduction oflhis report in connection with the advertisement, promotion or sale or any product or process, or in connection with lhe re-publication orthis report for any purpose other than for the addressee will be granted only on contact. This company accepts no responsibility except for the due per[onnonce of inspection and/ofanalysis in good faith and according to the rules of the trade and of science. EI\ERGY .... ,'\!.. ~()f~/\' O hlll S www.energylab.com ( AHJyfkMEmIIMI&ISIIIc.,m ) Halana, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillatte, WY 866-686-7175 • Rapid City, so 888-672-1225 • Collage Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Project: Semi Annual Groundwater Lab 10: C 10110584-005 Client Sample 10: MW 28 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS· DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLIDES • DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. Result ND 157 492 107 0.58 162 0.17 0.2 11.7 288 2290 7.69 3630 11 .9 ND 4.11 ND 31 ND 42 ND 1510 ND ND 28 ND ND 0.81 ND 3.45 ND 43 0.6 0.1 0.1 Units mg/l mg/l mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L S.u. mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/l ug/L ug/L ug/L ug/L ug/l ug/L ug/L ug/L ug/L ug/L ug/l ug/L pC ill pC ill pC ill MDC -Minimum detectable concentration Report Date: 12/08/10 Collection Date: 11/12/10 11 :35 DateReceived: 11/16/10 Matrix: Aqueous MCL! Qualifiers Rl QCl Method Analysis Date I By D D D A2320 B 11/16/1019:131 jba A2320 B 11/16/1019:131 jba E200.7 12/03/10 15:451 cp A4500-CI B 11/23/10 11 :02/1r 0.10 A4500-F C 11/17/10 11 :331 jba 0.5 E200.7 12103/10 15:451 cp 0.05 A4500-NH3 G 11/17/10 16:50/dc 0.1 E353.2 11/19/10 12:55/dc 0.5 E200.7 12/03/10 15:45 I cp E200.7 12/03/10 15:45 I cp 50 A4500-S04 E 11/30/10 11 :38 Ilr 0.01 A4500-H B 11/16/10 13:2711r 10 A2540 C 11/16/10 16:15/1r 5.0 E200.8 11/20/1010:371 sml 0.50 E200.8 11/20/1010:37/sml 0.50 E200.8 11/20/10 10:37 I sml 25 E200.8 11/20/1010:371 sml 10 E200.8 11/20/1010:371 sml 10 E200.8 11/20/1010:371 sml 30 E200.7 12103/1015:451 cp 1.0 E200.8 11/20/1010:371 sml 10 E200.8 11/20/1010:371 sml 0.50 E200.8 11/20/1010:371 sml 10 E200.8 11/20/1010:371 sml 20 E200.8 11/20/1010:371 sml 5.0 E200.8 11/20/1010:371 sml 10 E200.8 12/04/10 11 :50 I sml 0.50 E200.8 11/20/1010:371 sml 100 E200.8 11/20/1010:371 sml 0.30 E200.8 11/20/1010:371 sml 15 E200.8 11/20/1010:371 sml 10 E200.8 11/20/1010:371 sml E900.1 02/22/11 22 :32 I ep E900.1 02122111 22 :32 1 ep E900.1 02/22111 22 :32 1 ep MCl -Maximum contaminant level. ND -Not detected at the reporting limit. D -Rl increased due to sample matrix. Page 11 of 32 EI\ERGY J\{";Of?AI Ol-ll~ !:. www.energylab.com AIuITbf Ex~ SI1rc.,15t Helena, NT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Glllelte, WY 866-186-7175 · Rapid City, SD 188-672-1225 . Collage Station, TXasS-690-22IS LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/08/10 Collection Date: 11/12/10 11 :35 DateRecelved: 11/16/10 Matrix: Aqueous Client: Project: Lab 10: Denison Mines USA Corp Semi Annual Groundwater C1 011 0584-005 Client Sample 10: MW 28 Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (O.BO -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chlor%rm Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluorome!hane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions; RL -Analyte reporting limit. QCL -Quality control limit. Result -2.40 53.2 50.7 3440 1.06 ND ND ND ND ND ND ND ND ND ND 10B 150 10B 106 Units % meq/L meq/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L %REC %REC %REC %REC S -Spike recovery outside of advisory limits. MCU Qualifiers RL QCL Method Analysis Date 1 By Calculation 12/05/1 0 11 :24 1 kbh Calculation 12/05/10 11 :241 kbh Calculation 12/05/10 11 :24 1 kbh Calculation 12/05/10 11 :241 kbh Calculation 12/05/10 11 :241 kbh 20 SWB260B 11/24/1003:201 rmh 1.0 SWB260B 11/24/1003:201 rmh 1.0 SW8260B 11/24/1003:201 rmh 1.0 SW8260B 11/24/10 03:201 rmh 1.0 SW8260B 11/24/1003:201 rmh 20 SW8260B 11/24/1003:201 rmh 1.0 SW8260B 11/24/10 03:201 rmh 1.0 SWB260B 11/24/1003:201 rmh 1.0 SWB260B 11/24/1003:201 rmh 1.0 SW8260B 11/24/10 03:201 rmh BO-120 SWB260B 11/24/10 03:201 rmh S 70-130 SWB260B 11/24/10 03:201 rmh BO-120 SWB260B 11/24/10 03:201 rmh BO-120 SWB260B 11/24/1003:201 rmh MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 12 of 32 A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter-Semiannual Groundwater 1011246-003A Client Sample ID: MW-29 Collection Date: 11/9/2010 1505h Received Date: Method Used: 11112/20101000h SW8260C Contact: Jo Ann Tischler Analyzed: 11117/2010 1235h Analytical Results VOAs by GC/MS Method 8260CI5030C Units: 11g/L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 105 80-123 107 80-124 99.0 80-125 99.4 Report Date: 11/19/2010 Page 6 of 15 All analyses applicable to the CWA, SDWA. and RCRA are perfonned in accordance to NELAC protocols. Pertinenl sampling information is located on the allached COCo This report is provided for the exclusive use of the addressee. Privileges of subsequent use of lhe name of this company or any member of its stafT. or reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection with the ce-public8.tion of this report for any purpose olher than for the addressee will be granted only on contact. This company accepts no responsibility except for the due performance of inspection and/or analysis in good faith and according to the rules of the trade and of science. EI\ERGY _'"\) o r (j\TC'I~!l :.... www.energylab.com MI/ftaI~SiIru 1m Helana, MT 877-472-0711 • Billings, MT 80D-735-4489 • Casper, WY 888-235-1515 Gillette, WY 886-18&-7175 • Rapid City, SD 888-612-1225 • Collage Station, IX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Project: 4th Quarter-Semi-Annual Groundwater LablD: Cl 011 0505-003 Client Sample ID: MW 29 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS -DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLIDES -DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result Units ND mg/L 355 mg/L 470 mg/L 39 mg/L 0.74 mg/L 211 mg/L 0.99 mg/L ND mg/L 17.4 mg/L 454 mglL 2690 mg/L 7.26 s.u. 4390 mg/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L 1490 ug/L ND ug/L 4890 ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L 11 .6 ug/L ND ug/L 20 ug/L 0.7 pCi/L 0.1 pCi/L 0.1 pCilL MDC -Minimum detectable concentration Report Date: 12/29/10 Collection Date: 11/09/10 15:05 DateRecelved: 11/12/10 Matrix: Aqueous MCL! Qualifiers RL QCL Method Analysis Date 1 By D D D D A2320 B 11/13/10 02:09 1 jba A2320 B 11/13/10 02:09 1 jba E200.7 12/01/10 16:13/cp A4500-CI B 11/16/1009:24/1r 0.10 A4500-F C 11/12/1013:231 jba 0.5 E200.7 12/01/10 16:13/cp 0.05 A4500-NH3 G 11/17/10 16:08 1 de 0.1 E353.2 11/12/10 16:10/dc 0.5 E200.7 12/01/10 16:13/cp E200.7 12/01/1016:131 cp 50 A4500-S04 E 11/16/1013:50 !lr 0.01 A4500-H B 11/12/10 15:16/1r 12 A2540 C 11/12110 15:10/1r 5.0 E200.8 11/20/10 08:35 1 sml 0.50 E200.8 11/20/10 08:35 1 sml 0.50 E200.8 11/20/10 08:351 sml 25 E200.8 11/20/10 08:35 1 sml 10 E200.8 11/20/10 08:35 1 sml 10 E200.8 11/20/10 08:35 1 sml 30 E200.7 12101/1016:131 cp 1.0 E200.8 11/20/10 08:35 1 sml 10 E200.8 11/20/1008:351 sml 0.50 E200.8 11/20/1008:351 sml 10 E200.8 11/20/1008:351 sml 20 E200.8 11/20/1008:351 sml 5.0 E200.8 11/20/1008:351 sml 10 E200.8 11/30/1002:081 sml 0.50 E200.8 11/20/10 08 :351 sml 100 E200.8 11/20/1008:35/sml 0.30 E200.8 11/20/1008:351 sml 15 E200.8 11/20/1008:351 sml 10 E200.8 11/20/1008:351 sml E900.1 02/22/11 22 :32 1 ep E900.1 02/22/11 22:321 ep E900.1 02/22/11 22 :32 1 ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 7 of 38 EI\ERGY "110I~A I0l-1IL!:i www.energylab.eom AM/fIIuI bclflMlel S/Ic. 1152 Helena, MT 817·472-0711 • Billings, MT 800·731·4489 • Casper, WY 888·235·0515 Gillette, WY 8&&·186·7175 · Rapid City, SD 888·&72·1225 • Collage Station, IX 888·690·2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/29/10 Collection Date: 11/09/10 15:05 DateRecelved: 11/12/10 Matrix: Aqueous Client: Denison Mines USA Corp Project: lablD: 4th Quarter-Semi-Annual Groundwater C1 011 0505-003 Client Sample ID: MW 29 Analyses DATA QUALITY NC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (O.BO -1.20) VOLATilE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: l,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCl -Quality control limit. Result Units -1.4B % 62.9 meq/L 61.1 meq/L 4070 mg/l 1.0B ND ug/L ND ug/L ND ug/L ND ug/l ND ug/L ND ug/l ND ug/l ND ug/l ND ug/l ND ug/l 103 %REC 112 %REC 95.0 %REC 104 %REC MCL! Qualifiers Rl QCl Method Analysis Date 1 By Calculation 12/05/10 11 :13 1 kbh Calculation 12/05/1011:131 kbh Calculation 12/05/10 11 :13 1 kbh Calculation 12/05/10 11 :13 1 kbh Calculation 12/05/10 11 :13 1 kbh 20 SWB260B 11/23/1000:241 rmh 1.0 SWB260B 11/23/1000:241 rmh 1.0 SWB260B 11/23/1000:241 rmh 1.0 SWB260B 11/23/1000:241 rmh 1.0 SWB260B 11/23/10 00:24 1 rmh 20 SWB260B 11/23/1000:241 rmh 1.0 SWB260B 11/23/10 00:241 rmh 1.0 SWB260B 11/23/10 00:241 rmh 1.0 SWB260B 11/23/10 00:241 rmh 1.0 SWB260B 11/23/10 00:241 rmh BO-120 SWB260B 11/23/1000:241 rmh 70-130 SWB260B 11/23/1000:241 rmh BO-120 SW8260B 11/23/1000:241 rmh BO-120 SWB260B 11/23/1000:241 rmh MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 8 of 38 A AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter-Semiannual Groundwater 1011246-004A Client Sample ID: MW-30 Collection Date: 1119/2010 1220h Received Date: 11112/2010 1000h Method Used: SW8260C Contact: Jo Ann Tischler Analyzed: 11117/2010 1254h Analytical Results VOAs by GCIMS Method 8260CI5030C Units: j.lgIL Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 105 80-123 106 80-124 99.5 80-125 99.9 Report Date: 11/19/2010 Page 7 of15 All analyses applicable to the CWA, SDWA, and ReRA are performed in accordance to NELAC proLocols. Pertinent sampling infonnaLion is located on the attached CDC. This report is provided for the exclusivo use oflhe addressee. Privileges of subsequent use or the na.me of Lhls company or any member of its staff, or reproduction of this report in connection with Lhe advertisement, promotion or sale of any product or process, or in connection with the re-publication of this report for any purpose other than for the addressee will be granted only on contact. This company accepts no responsibility except for the due perfomlance of inspection and/or analysis in good faith and according to the rules of the trade and of science. EN:RGY ,.,! .Ofi;\I( II ill ~. www.energylab.com 1MIyt/QI~~ 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 8&6-186-7115 • Rapid City, SD 888-672-1225 • Collage Station, TX 888-690-221 8 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/29/10 Collection Date: 11/09/10 12:20 DateReceived: 11/12/10 Matrix: Aqueous Client: Denison Mines USA Corp Project: LablD: 4th Quarter-Semi-Annual Groundwater C 10110505-004 Client Sample ID: MW 30 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS -DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLIDES -DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Report Definitions: Rl -Analyte reporting limit. QCL -Quality control limit. Result Units ND mg/L 190 mg/L 251 mg/L 126 mg/L 0.36 mg/L 64.1 mg/L 0.05 mg/L 15 mglL 6.9 mglL 94.7 mg/l 720 mg/L 7.51 s.u. 1700 mg/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L 70 ug/L ND ug/L 36 ug/L ND ug/L ND ug/L ND ug/L 32.2 ug/L ND ug/L ND ug/L ND uglL 6.64 ug/L ND ug/L ND ug/L 0.2 pC ilL 0.08 pC ilL 0.1 pC ilL MDC -Minimum detectable concentration MCU Qualifiers Rl Qel Method Analysis Date 1 By D D D A2320 B 11/13/1002:171 jba A2320 B 11/13/1002:171 jba 0.5 E200.7 12/01/1016:171 cp A4500-CI B 11/16/1009:27/1r 0.10 A4500-F C 11/1211013:261 jba 0.5 E200.7 12/01/1016:171 cp 0.05 A4500-NH3 G 11/17/10 16:10/dc E353.2 11/12/1016:171 dc 0.5 E200.7 12101/1016:171 cp 0.6 E200.7 12/01/1016:171 cp 50 A4500-S04 E 11/16/10 13:52/1r 0.01 A4500-H B 11/12/10 15:20/lr 10 A2540 C 11/12/10 15:10/1r 5.0 E200.8 11/20/10 08:421 sml 0.50 E200.8 11/20/1008:421 sml 0.50 E200.8 11/20/10 08:421 sml 25 E200.8 11/20/10 08:421 sml 10 E200.8 11/20/1008:421 sml 10 E200.8 11/20/10 08 :42 1 sml 30 E200.7 12/01/1016:171 cp 1.0 E200.8 11/20/10 08:42 1 sml 10 E200.8 11/20/1008:421 sml 0.50 E200.8 11/20/1008:421 sml 10 E200.8 11/20/1008:421 sml 20 E200.8 11/20/10 08:421 sml 5.0 E200.8 11/20/1008:421 sml 10 E200.8 11/30/10 02:421 sml 0.50 E200.8 11/20/10 08:421 sml 100 E200.8 11/20/1008:421 sml 0.30 E200.8 11/20/1008:421 sml 15 E200.8 11/20/1008:421 sml 10 E200.8 11/20/1008:421 sml E900.1 02/22/11 22:321 ep E900.1 02/22/11 22:321 ep E900.1 02/22/11 22:321 ep MCl -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 9 of 38 EI\ERGY • l\H~)I .j"1 { ,..',1 " www.energylab.com Aa/yfkIII EzuIIMa S/K, 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 GlIIatta, WY 866-186-7175 • Rapid City, SD 888-672-1225 • Colleg8 Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/29/10 Collection Date: 11109/10 12:20 DateReceived: 11/12/10 Matrix: Aqueous Client: Denison Mines USA Corp Project: Lab 10: 4th Quarter-Semi-Annual Groundwater C1 011 0505-004 Client Sample ID: MW30 Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (O.BO -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-0ichlorobenzene-d4 Surr: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-dB Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result Units -1.46 % 22.B meq/L 22.1 meq/L 1440 mg/L 1.1B NO ug/L NO ug/L ND ug/L ND ug/l NO ug/L NO ug/l NO ug/L NO ug/L NO ug/L NO ug/L 104 %REC 97.0 %REC 100 %REC 100 %REC MCL! Qualifiers RL QCl Method Analysis Date 1 By Calculation 12105/1011 :141 kbh Calculation 12/05/10 11 :141 kbh Calculation 12105/1 0 11 : 14 1 kbh Calculation 12/05/10 11 : 14 1 kbh Calculation 12/05/10 11 : 14 1 kbh 20 SWB260B 11/19/10 1B:051 rmh 1.0 SWB260B 11/19/10 1B:05 1 rmh 1.0 SWB260B 11/19/10 1B:05 1 rmh 1.0 SWB260B 11/19/1018:051 rmh 1.0 SWB260B 11/19/10 1B:05 1 rmh 20 SWB260B 11/19/10 1B:05 1 rmh 1.0 SWB260B 11/19/1 0 1B :05 1 rm h 1.0 SWB260B 11/19/101B:05/rmh 1.0 SWB260B 11/19/101B:05/rmh 1.0 SWB260B 11/19/10 1B:05 1 rmh 80-120 SWB260B 11/19/10 1B:05 1 rmh 70-130 SWB260B 11/19/101B:05/rmh BO-120 SWB260B 11/19/10 1B:05 1 rmh BO-120 SWB260B 11/19/10 1B:05 1 rmh MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 10 of 38 A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter-Semiannual Groundwater 1011246-005A Client Sample ID: MW-31 Collection Date: 111912010 1430h Received Date: 1111212010 1000h Method Used: SW8260C Contact: Jo Ann Tischler Analyzed: 11117/2010 13l3h Analytical Results VOAs by GC/MS Method 8260CI5030C Units: IlgIL Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 106 80-123 109 80-124 99.4 80-125 101 Report Date: 11/19/2010 Page 8 of1S All analyses applicable La the CWA, SDWA, and ReRA are performed in accordance to NELAC prolocols. Pertinent sampling informaLion is located on the attached COCo This report is provided for the exclusive use of the addressee. Privileges of subsequent use of the name of this company or any member ofiLs staff, or reproduction of this report in connection with the advertisement, promoLion OT sale of any product or process, or in connecLion wiLh the fe-publication oflhis report. for any purpose other than for the addressee will be granted only on contact. This company accepts no responsibiliLy excepL for the due perfonnance of inspection and/or analysis in good faith and acconiing to the rules of the trade lind of science. EI\ERGY 1\ .t)1 .1\1 <""1 <I. 'j www.energylab.com AMI1fkM buIIM&f Shtu 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 166-186-7175 • Rapid City, so 888-672-1225 • College Station, ]X B88-690-Ut8 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Project: 4th Quarter-Semi-Annual Groundwater Lab ID: C1 011 0505-005 Client Sample ID: MW 31 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS -DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLIDES -DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result Units NO mg/L 216 mg/L 166 mg/L 138 mg/L 0.84 mg/L 77.8 mg/L ND mg/L 20 mg/L 5.9 mg/L 85.4 mg/L 539 mg/L 7.70 S.u. 1320 mg/L ND ug/L ND ug/L NO uglL NO ug/L ND ug/L NO ug/L NO ug/L ND ug/L NO ug/L ND ug/L ND ug/L ND ug/L 60.0 ug/L NO ug/L NO ug/L NO ug/L 6.72 ug/L NO ug/L ND ug/L 0.4 pCi/L 0.09 pC ilL 0.1 pCi/L MOC -Minimum detectable concentration Report Date: 12/29/10 Collection Date: 11/09/10 14:30 DateReceived: 11/12/10 Matrix: Aqueous MCL! Qualifiers RL QCL Method Analysis Date I By D 0 D A2320 B 11/13/10 02:25 1 jba A2320 B 11/13/1002:251 jba 0.5 E200.7 12/01/1016:21/cp A4500-CI B 11/16/1009:30/1r 0.10 A4500-F C 11/12/1013:30 I jba 0.5 E200.7 12/01/1016:211 cp 0.05 A4500-NH3 G 11/17/10 16:12/dc 2 E353.2 11/12/10 16:20 /dc 0.5 E200.7 12/01/1016:21/cp 0.6 E200.7 12101/1016:211 cp 10 A4500-S04 E 11/16/10 13:55/1r 0.01 A4500-H B 11/12/10 15:23/1r 10 A2540 C 11/12/10 15:101lr 5.0 E200.8 11/20/10 08:491 sml 0.50 E200.8 11/20/10 08:49 1 sml 0.50 E200.8 11/2011008:49 1 sml 25 E200.8 11/20/1008:491 sml 10 E200.8 11/20/1008:491 sml 10 E200.8 11/20/10 08:49 1 sml 30 E200.7 12/01/1016:211 cp 1.0 E200.8 11/20/10 08:491 sml 10 E200.8 11/20/1008:491 sml 0.50 E200.8 11/20/1008:491 sml 10 E200.8 11/20/1008:491 sml 20 E200.8 11/20/10 08:491 sml 5.0 E200.8 11 /20/10 08:491 sml 10 E200.8 11 /30/10 02:491 sml 0.50 E200.8 11/20/10 08:491 sml 100 E200.8 11/20/1008:491 sml 0.30 E200.8 11/20/10 08:49 1 sml 15 E200.8 11/20/10 08:491 sml 10 E200.8 11/20/10 08 :49 1 sml E900.1 02/22/11 22:32 I ep E900.1 02/22/11 22:321 ep E900.1 02/22/11 22:32 I ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 11 of 38 EN:RGY 1\1 >OI';/d t.JHH ~ .. www.energylab.com AnIyt/a/ Em/IMJa SIItcI 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 GiIIBHe, WY 8&6-18&-7175 • Rapid City, SD 888-&72-1225 . College Station, IX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/29/10 Collection Date: 11/09/10 14:30 DateReceived: 11/12/10 Matrix: Aqueous Client: Denison Mines USA Corp Project: LablD: 4th Quarter-Semi-Annual Groundwater C1 011 0505-005 Client Sample ID: MW 31 Analyses DATA QUALITY NC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result Units -4.15 % 20.1 meq/L 18.5 meq/L 1220 mg/L 1.08 ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L 107 %REC 102 %REC 100 %REC 100 %REC MCL! Qualifiers RL QCL Method Analysis Date 1 By Calculation 12/05/10 11 :14 1 kbh Calculation 12/05/10 11 :14 1 kbh Calculation 12105/10 11 :14 1 kbh Calculation 12/05/1011 :141 kbh Calculation 12/05/10 11 :14 1 kbh 20 SW8260B 11/19/10 18:421 rmh 1.0 SW8260B 11/19/10 18:421 rmh 1.0 SW8260B 11/19/10 18:421 rmh 1.0 SW8260B 11/19/10 16:42/rmh 1.0 SW8260B 11/19/10 18:42/rmh 20 SW8260B 11/19/1016:421 rmh 1.0 SW8260B 11/19/1018:421 rmh 1.0 SW8260B 11/19/1016:421 rmh 1.0 SW6260B 11/19/1016:421 rmh 1.0 SW6260B 11/19/1018:421 rmh 60-120 SW8260B 11/19/10 18:42/rmh 70-130 SW8260B 11/19/1 0 18 :42 1 rm h 60-120 SW8260B 11/19/10 16:421 rmh 80-120 SW6260B 11/19/1 0 18 :42 1 rm h MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 12 of 38 A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter-Semiannual Groundwater 1011246-006A Client Sample ID: MW-32 Collection Date: 11110/2010 1320h Received Date: Method Used: 11/12/2010 1000h SW8260C Contact: Jo Ann Tischler Analyzed: 11117/2010 1332h Analytical Results VOAs by GC/MS Method 8260CI5030C Units: )lg/L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene SUIT: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 107 80-123 108 80-124 99.5 80-125 99.8 Report Date: 11119/2010 Page 9 of1S All analyses applicable Lo the CWA, SDWA, and RCRA are performed in accordance to NELAC protocols. Pertinent sampling information is located on the attached COCo This report is provided for the exclusive usc of the addressee. Privileges ofsubsequcnt use of the name of this company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or saLe arany product or process, or in connection with the re-publication of this report for any purpose oLher than for the addressee will be granted only on contact. This company accepls no responsibility except for the due perfonnance of inspection and/or analysis in good faith and according to the rules of the trade and of science. Er\ERGY /"l~Or d\I CHILS www.energylab.com ~rxr.tIMIft SIIu 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 886-888-7175 • Rapid City, SD 888-&72-1225 • College Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Project: 4th Quarter-Semi-Annual Groundwater LablD: C1 011 0505-006 Client Sample ID: MW 32 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS -DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLIDES -DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Report Definitions: RL -Analy1e reporting limit. QCL -Quality control limit. Result Units ND mg/L 483 mg/L 498 mg/L 35 mg/L 0.19 mglL 211 mg/L 1.04 mg/L ND mg/L 14.4 mg/L 218 mg/L 2330 mg/L 7.23 S.u. 3690 mg/L ND ug/L ND ug/L 0.78 ug/L ND ug/L 46 ug/L ND ug/L 6200 ug/L ND ug/L 5090 ug/L ND ug/L ND ug/L 49 ug/L ND ug/L ND ug/L ND ug/L ND ug/L 2.11 ug/L ND ug/L 81 ug/L 1.4 pC ilL 0.1 pC ilL 0.1 pCi/L MDC -Minimum detectable concentration Report Date: 12/29/10 Collection Date: 11/10/10 13:20 DateReceived: 11/12/10 Matrix: Aqueous MCL! Qualifiers RL QCL Method Analysis Date 1 By D D D A2320 B 11/13/10 02:341 jba A2320 B 11/13/10 02:341 jba E200.7 12/01/10 16:251 cp A4500-CI B 11/16/1009:32/1r 0.10 A4500-F C 11/12/1013:331 jba 0.5 E200.7 12/01/1016:251 cp 0.05 A4500-NH3 G 11/17/10 16:20/dc 0.1 E353.2 11/12/1016:221 dc 0.5 E200.7 12/01/10 16:251 cp E200.7 12/01/1016:251 cp 50 A4500-S04 E 11/16/10 13:57/1r 0.01 A4500-H B 11/12110 15:301lr 10 A2540 C 11/12/10 15:10/1r 5.0 E200.8 11/20/1008:561 sml 0.50 E200.8 11/30/1002:561 sml 0.50 E200.8 11/20/1008:561 sml 25 E200.8 11/30/1002:561 sml 10 E200.8 11/30/1002:561 sml 10 E200.8 11/20/1008:561 sml 30 E200.7 12/01/1016:251 cp 1.0 E200.8 11/20/10 08:561 sml 10 E200.8 11/30/1002:561 sml 0.50 E200.8 11/20/1008:561 sml 10 E200.8 11/20/1008:561 sml 20 E200.8 11/20/1008:561 sml 5.0 E200.8 11/20/1008:561 sml 10 E200.8 11/30/1002:561 sml 0.50 E200.8 11/20/1008:561 sml 100 E200.8 11/20/10 08:561 sml 0.30 E200.8 11/20/1008:561 sml 15 E200.8 11/30/1002:561 sml 10 E200.8 11/20/1008:561 sml E900.1 02/22/11 22 :32 1 ep E900.1 02/22/11 22:321 ep E900.1 02/22/11 22:321 ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 13 of 38 EN:RGY ... /\L'-30IU\IOlll: '-, www.energylab.com AMIyI/I:M EzuI/G:I smu 1m Helena, MT 871·472-0711 • Billings, MT 800·735·4489 . Casper, WY 888·235·0515 Gillette, WY 886·186·7175 . Rapid City, SD 888·672·1225 • College Station, IX 888·690·2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/29/10 Collection Date: 11/10/10 13:20 DateReceived: 11/12/10 Matrix: Aqueous Client: Denison Mines USA Corp Project: LablD: 4th Quarter-Semi-Annual Groundwater C1 011 0505-006 Client Sample ID: MW 32 Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result Units -4.77 % 57.4 meq/l 52.2 meq/L 3560 mg/L 1.04 ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L 106 %REC 105 %REC 99.0 %REC 101 %REC MCL! Qualifiers Rl QCl Method Analysis Date 1 By Calculation 12/05/1 0 11 : 14 1 kbh Calculation 12/05/10 11 :14 1 kbh Calculation 12/05/1011 :14 1 kbh Calculation 12/05/10 11:14/kbh Calculation 12/05/1011 :14 1 kbh 20 SW8260B 11/19/1019:191 rmh 1.0 SW8260B 11/19/10 19:191 rmh 1.0 SW8260B 11/19/10 19:19/rmh 1.0 SW8260B 11/19/10 19:191 rmh 1.0 SW8260B 11/19/10 19:19/rmh 20 SW8260B 11/19/1019:191 rmh 1.0 SW8260B 11/19/1019:191 rmh 1.0 SW8260B 11/19/1019:191 rmh 1.0 SW8260B 11/19/1019:191 rmh 1.0 SW8260B 11/19/1019:191 rmh 80-120 SW8260B 11/19/1019:191 rmh 70-130 SW8260B 11/19/10 19:19/rmh 80-120 SW8260B 11/19/10 19:191 rmh 80-120 SW8260B 11/19/10 19:191 rmh MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 14 of 38 A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: I Denison Mines 4th Quarter-Semiannual Groundwater 1011504-002A Client Sample ID: MW-34 Collection Date: 1112912010 0810h Received Date: Method Used: 1113012010 1005h SW8260C Contact: Jo AnnITischler Analyzed: 11130/2010 141Sh Analytical Results VOAs by GC/MS Method 8260CI5030C Units: IlgiL Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-dS CAS Number 109-99-9 17060-07-0 460-00-4 IS6S-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 114 SO-123 107 SO-124 106 SO-125 98.1 Report Date: 12/8/2010 Page 5 of 17 All analyses applicable to the CWA, SDWA. and RCRA arc perfonned in accordance to NELAC protocols. Pertinent sampling information is located on the attached COCo This report is provided for the exclusive usc of the addressee. Privileges of subsequent use of the name of this company or any member of Hs staff, or reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection wit,h the rc~public~lion ,of Lh~s report. for a~y putpose other than for the addressee will be granted only on contact. This company accepts no responsibility except for the due perfonnance of inspection and/or analysis in good faith EN:RGY _ 1-\ P,c) 17 AI ~"rClI C""r:- www.energylab.com WIybI £zukI SIIru 1m Helena, MT 877·472·0111 • Billings, MT 800·735-4489 • Casper, WY 881·235·0515 Gillette, WV 866·686·7175. Rapid City, SI) 888·672·1225 • College Stalion,lX 888·690·2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 LablD: C1 011 0928-002 Client Sample ID: MW34 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS· DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLlDES· DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±l Gross Alpha minus Rn & U MDC Report Definitions: Rl -Analyte reporting limit. QCL -Quality control limit. Result ND 335 492 69 0.54 144 0.15 0.3 13.8 398 2280 7.68 3720 ND ND ND ND ND ND 32 ND 247 ND ND ND 128 ND 0.73 ND 27.4 ND ND 1.5 0.8 1.0 Units mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L S.u. mg/l ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/l ug/L ug/l ug/L ug/L ug/L ug/L ug/L pC ilL pC ilL pC ilL MDC -Minimum detectable concentration Report Date: 01/06/11 Collection Date: 11/29/10 08:10 DateReceived: 11/30/10 Matrix: Aqueous MCL! Qualifiers Rl QCl Method Analysis Date 1 By D D D D A2320 B 12101/10 18:45/jba A2320 B 12/01/1018:451 jba E200.7 12/09/10 13:031 cp , A4500-CI B 12/15/10 15:36/1mc 0.10 A4500-F C 12/01/1012:101 jba 0.5 E200.7 12109/10 13:03 1 cp 0.05 A4500-NH3 G 12/07/1011 :20 1 dc 0.1 E353.2 12/03/10 12:32 1 dc 0.5 E200.7 12/09/10 13:03 1 cp 1 E200.7 12/09/10 13:031 cp 50 A4500-S04 E 12/06/10 13:59/1r 0.01 A4500-H B 11/30/10 15:10/1r 11 A2540 C 12101/10 15:07/1r 5.0 E200.8 12/17/1003:161 sml 0.50 E200.8 12/2211014:091 sml 0.50 E200.8 12/17/1003:16/sml 25 E200.8 12/17/1003:161 sml 10 E200.8 12/17/1003:161 sml 10 E200.8 12/22110 14:091 sml 30 E200.7 12/09/10 13:031 cp 1.0 E200.8 12/23/10 15:21 1 sml 10 E200.8 12/17/10 03:16 1 sml 0.50 E200.8 01/04/11 11 :241 sml 10 E200.8 12/17/10 03:161 sml 20 E200.8 12/17/10 03:161 sml 5.0 E200.8 12117/10 03:161 sml 10 E200.8 12/22/1014:091 sml 0.50 E200.8 12/23/10 15:21 1 sml 100 E200.8 12/17/10 03:161 sml 0.30 E200.8 12/23/1015:211 sml 15 E200.8 12117/10 03:161 sml 10 E200.8 12/22/10 14:09 1 sml E900.1 12/02/10 09:381 ep E900.1 12/02/10 09:381 ep E900.1 12/02/10 09:381 ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -Rl increased due to sample matrix. Page 5 of25 EI\ERGY I ; I), 1'1 1 '1/1-'--' www.energylab.com AnlIftJaI ~ SfIlU tm Helena, MT 877·412·0111 • Billings, MT 800·135·4489. Casper, WY 888·235·0515 Gillette, WY 866-186·1175 • Rapid City, SD 888·612·1225 • College Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: LablD: Denison Mines USA Corp Semi-Annual Groundwater 2010 C1 011 0928-002 Client Sample ID: MW34 Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (O.BO -1 .20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-dB Report Defin it ions : RL -Analyte reporting limit. QCL -Quality control limit. Result -0.707 54.B 54.1 3580 1.04 ND ND ND ND ND ND ND ND 1.1 1.4 99.0 110 97.0 96.0 Units % meq/L meq/L mg/L ug/L ug/l ug/l ug/L ug/L ug/L ug/L ug/L ug/L ug/L %REC %REC %REC %REC Qualifiers Rl 20 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 BO-120 70-130 BO-120 BO-120 Report Date: 01/06/11 Collection Date: 11/29/10 08:10 DateReceived: 11/30/10 Matrix: Aqueous MCll QCl Method Analysis Date 1 By Calculation 12/16/10 07:41 1 kbh Calculation 12/16/10 07:41 1 kbh Calculation 12/16/10 07:41 1 kbh Calculation 12/16/10 07:41 1 kbh Calculation 12116/10 07:41 1 kbh SWB260B 12102/10 02:20 1 ilr SWB260B 12/02110 02:20 1 ilr SWB260B 12102/10 02:201 ilr SWB260B 12102110 02:201 ilr SWB260B 12/02110 02:20 1 jlr SWB260B 12/02/10 02:201 jlr SWB260B 12/02110 02:201 jlr SWB260B 12/02110 02:20 1 jlr SWB260B 12/02/10 02:201 jlr SWB260B 12/02/10 02:201 ilr SWB260B 12/02/10 02:201 ilr SWB260B 12102110 02:201 jlr SWB260B 12102110 02:201 jlr SWB260B 12102/10 02:20 1 ilr MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 6of25 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter-Semiannual Groundwater 1011504-001A Client Sample ID: MW-34R Collection Date: 11126/2010 1011h Received Date: Method Used: 11130/2010 1005h SW8260C Contact: Jo ADn Tischler Analyzed: 11130/2010 1359h Analytical Results VOAs by GC/MS Method 8260C/5030C Units: ~g/L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 114 80-123 105 80-124 105 80-125 97.6 Report Date: 12/8/201 0 Page 4 of 17 All analyses applicable to the CWA, SDWA, and RCRA are performed in accordance to NELAC protocols. Pertinent sampling information is located on the attached COCo This report is provided [or the exclusive use of the addressee. Privileges of subsequent use of the name or this company or any member of its staff, or reproduction oftbis report in connection with the advertisement, promotion or sale of any product or process, or in connection with the r~:public~tion ,ofth!s.report for a,nypu9'0sc other than for the addressee will be gran Led only on contacl. This company accepts no responsibility except for the due perfonnance ofinspection and/or analysis in good faith EN:RGY 1_ /\ ~L' f1/\T~)f?l:=-':-::; www.energylab.com ~~Sblurw Helena, MT 817·472·0111 • Billings, MT 800·735·4489 • Casper, WY 888·235·0515 Gillette, WY 866-686-7175 • Rapid City, SIJ 888·672·1225 • College Station, 1X 888·690·2218 LABORATORY ANAL VTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Lab 10: C1 011 0928-001 Client Sample 10: MW34R Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TOS @ 180 C METALS· DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLlDES· DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MOC Report Defin itions: RL -Analyte reporting limit. QCL -Quality control limit. Result NO 5 NO NO NO NO 0.06 0.1 NO NO 2 8.00 NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO NO 1.5 0.8 1.0 Units mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L S.u. mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L pCi/L pCi/L pC ilL MOC -Minimum detectable concentration o -RL increased due to sample matrix. Report Date: 01/06/11 Collection Date: 11/26/10 10:11 DateReceived: 11/30/10 Matrix: Aqueous MCll Qualifiers Rl QCl Method Analysis Date 1 By A2320 B 12/01/10 18:241 jba A2320 B 12101/10 18:241 jba 0.5 E200.7 12/09/10 12:59 1 cp A4500-CI B 12/15/10 15:32 /lmc 0.10 A4500-F C 12/01/10 11 :59 1 jba 0.5 E200.7 12/09/10 12:591 cp 0.05 A4500-NH3 G 12107/10 11:18/dc 0.1 E353.2 12/03/10 12:30 1 dc 0.5 E200.7 12/09/10 12:59 1 cp 0 0.6 E200.7 12/09110 12:59 1 cp B A4500-S04 E 12/06/10 13:56 1 Ir 0.01 A4500-H B 11/30/10 15:02 /lr 10 A2540 C 12/01/10 15:05 /lr 5.0 E200.8 12/17/1003:09/sml 0.50 E200.8 12/22/1014:021 sml 0.50 E200.8 12/17/10 03:091 sml 25 E200.8 12/17/10 03:091 sml 10 E200.8 12117/10 03:091 sml 10 E200.8 12/22/10 14:021 sml 30 E200.7 12/09/10 12:59 1 cp 1.0 E200.8 12/17/1003:091 sml 10 E200.8 12/17/1003:091 sml 0.50 E200.8 01/04/11 11:171 sml 10 E200.8 12/17/10 03:09 1 sml 20 E200.8 12/17/10 03:091 sml 5.0 E200.8 12117/1003:09/sml 10 E200.8 12/22/10 14:021 sml 0.50 E200.8 12117/10 03:091 sml 100 E200.8 12/17/10 03:091 sml 0.30 E200.8 12/17/10 03:091 sml 15 E200.8 12/17/10 03:091 sml 10 E200.8 12/22/10 14:021 sml E900.1 12/02110 09:38 1 ep E900.1 12102110 09:38 1 ep E900.1 12102110 09:38 1 ep MCL -Maximum contaminant level. NO -Not detected at the reporting limit. B -The analyte was detected in the method blank. Page 3 of 25 EN:RGY I ;")('f(j\IC'I.t1 S www.energylab.com ~/EudHuSinu 1m Helena, MT 817-472-0711 • Billings, MT 800-735-4489. Casper, WY 888-235-0515 Gillette, WY 8&&-&8&-7115 • Rapid City, SD 818-&72-1225 • College Station, lX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: LablD: Client Sample ID: Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Denison Mines USA Corp Semi-Annual Groundwater 2010 C1 011 0928-001 MW34R Result -93.7 0.132 0.00428 Units % meq/L meq/L -The ion balance is not appropriate for samples with near blank results. VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-0ichlorobenzene-d4 Surr: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. NO ug/L NO ug/L NO ug/L NO ug/L NO ug/L NO ug/L NO ug/L NO ug/L NO ug/L NO ug/L 99.0 %REC 105 %REC 103 %REC 100 %REC Qualifiers Rl 20 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 80-120 70-130 80-120 80-120 Report Date: 01/06/11 Collection Date: 11/26/1010:11 DateReceived: 11/30/10 Matrix: Aqueous MCLI QCl Method Analysis Date 1 By Calculation 12116/10 07:401 kbh Calculation 12116/10 07:40 1 kbh Calculation 12/16/10 07:40 1 kbh SW8260B 12102/10 01 :441 jlr SW8260B 12/02110 01 :441 jlr SW8260B 12/02/10 01 :441 jlr SW8260B 12102/10 01 :44 1 jlr SW8260B 12102/10 01 :44 1 jlr SW8260B 12/02/10 01 :44 1 jlr SW8260B 12102/10 01 :44 1 jlr SW8260B 12102/10 01 :44 1 jlr SW8260B 12/02/10 01 :44 1 jlr SW8260B 12102/10 01 :44 1 jlr SW8260B 12102/10 01 :44 1 jlr SW8260B 12/02/10 01 :441 jlr SW8260B 12102/10 01 :441 jlr SW8260B 12/02/10 01 :44 1 jlr MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 4 of 25 A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter-Semiannual Groundwater 1012066-001A Client Sample ID: MW-35 Collection Date: 12/1/2010 0840h Received Date: Method Used: 12/3/20101000h SW8260C Contact: Jo Ann Tischler Analyzed: 12/3/2010 2343h Analytical Results VOAs by GC/MS Method 8260CI5030C Units: /lg/L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 115 80-123 107 80-124 106 80-125 98.9 Report Date: 12114/2010 Page 4 of 15 All analyses applicable to the CWA, SDWA, and ReRA EIre pcrfonncd in accordance to NELAC protocols. Pertinent sampling information is located on the attached CDC. This report is provided for the exclusive use ofthc addressee. Privileges of subsequent use afthc name of this company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or sale or any product or process, or in connection with the fe-publication of this report for any purpose otber than fortbe addressee will be granted only on contact. This company accepts no responsibility except fOf the due performance of inspection and/or analysis in good faith and according to the rules of the trade and of science. EI\ERGY J\l~Of,iAI OIHL~ www.energylab.com AtuIytIuIEZclll.""S/1IU 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 86&-IB6-7175 • Rapid City, so 888-&72-1225 • College Station, IX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp ProJect: Semi-Annual Groundwater 2010 LablD: C1 01201 05-001 Client Sample ID: MW 35 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS -DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLIDES -DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result ND 412 490 69 0.41 142 0.31 NO 11.7 379 2310 7.02 3760 ND ND ND ND 18 ND 388 NO 698 ND ND 26 ND NO 1.14 NO 27.2 ND 14 2.6 0.2 0.1 Units mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L S.u. mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L pCi/L pCi/L pCifL MDC -Minimum detectable concentration Report Date: 01/10/11 Collection Date: 12/01/1008:40 DateReceived: 12/03/10 Matrix: Aqueous MCU Qualifiers RL QCL Method Analysis Date I By 0 0 0 D A2320 B 12/03/1018:171 jba A2320 B 12/03/10 18:17 I jba E200.7 12/10/1015:10 I cp A4500-CI B 12/15/10 15:40/1mc 0.10 A4500-F C 12/07/10 10:40 I jba 0.5 E200.7 12/10/1015:10 I cp 0.05 A4500-NH3 G 12/07/10 12:34/dc 0.1 E353.2 12/03/10 14:50 I dc 0.5 E200.7 12/10/10 15:10/cp 1 E200.7 12/10/1015:10 I cp 50 A4500-S04 E 12/06/10 14:10/1r 0.01 A4500-H B 12103/10 14:44/1r 11 A2540 C 12/03/10 14:25 Ilr 5.0 E200.8 12/10/1011 :041 sml 0.50 E200.8 12/10/10 11 :041 sml 0.50 E200.8 12/10/10 11 :041 sml 25 E200.8 12/10/10 11 :041 sml 10 E200.8 12/10/10 11 :04 I sm I 10 E200.8 12/10/10 11:04/sml 30 E200.7 12/10/1015:101 cp 1.0 E200.8 12/10/10 11:04/sml 10 E200.8 12110/1011:041 sml 0.50 E200.8 12/10/1011 :04 1 sml 10 E200.8 12/10/1011 :04 1 sml 20 E200.8 12/10/10 11 :04 1 sml 5.0 E200.8 12/10/10 11 :04 1 sml 10 E200.8 01/07/11 12:461 sml 0.50 E200.8 12/10/10 11:04/sml 100 E200.B 12/10/10 11:04/sml 0.30 E200.8 12/10/10 11:04/sml 15 E200.8 12110/1011 :04 1 sml 10 E200.8 12/10/10 11 :04 1 sml E900.1 02/23/11 05 :25 1 ep E900.1 02/23/11 05 :25 1 ep E900.1 02/23/11 05 :25 1 ep MCL -Maximum contaminant level. NO -Not detected at the reporting limit. o -RL increased due to sample matrix. Page 3 of 22 EN:RGY . l\~onJ\lor~l[ s www.energylab.com ~Eltlll4IJ(;1S11tu 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 866-686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 01/10/11 Collection Date: 12/01/10 08:40 DateReceived: 12/03/10 Matrix: Aqueous Client: Project: LablD: Denison Mines USA Corp Semi-Annual Groundwater 2010 C1 01201 05-001 Client Sample ID: MW 35 Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result -3.46 56.8 53.0 3620 1.04 ND ND ND ND ND ND ND ND ND ND 99.0 106 99.0 99.0 MCU Units Qualifiers Rl QCl Method Analysis Date 1 By % Calculation 12/16/10 10:181 kbh meq/L Calculation 12/16/1010:181 kbh meq/L Calculation 12/16/1010:181 kbh mg/L Calculation 12/16/1010:181 kbh Calculation 12/16/1010:181 kbh ug/L 20 SW8260B 12/10/1017:131 jlr ug/L 1.0 SW8260B 12/10/1017:131 jlr ug/L 1.0 SW8260B 12/10/1017:131 jlr ug/L 1.0 SW8260B 12/10/1017:131 jlr ug/L 1.0 SW8260B 12/10/1017:131 jlr ug/L 20 SW8260B 12/10/1017:131 jlr ug/L 1.0 SW8260B 12/10/1017:131 jlr ug/L 1.0 SW8260B 12/10/1017:131 jlr ug/L 1.0 SW8260B 12/10/1017:131 jlr ug/L 1.0 SW8260B 12/10/1017:131 jlr %REC 80-120 SW8260B 12/10/1017:131 jlr %REC 70-130 SW8260B 12/10/1017:131 jlr %REC 80-120 SW8260B 12/10/10 17:13/jlr %REC 80-120 SW8260B 12/10/1017:131 jlr MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 4 of 22 A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter-Semiannual Groundwater 1011246-007 A Client Sample ID: MW-65 Collection Date: 11110/2010 1320h Received Date: Method Used: 11112/2010 1000h SW8260C Contact: Jo Ann Tischler Analyzed: 11117/2010 1351h Analytical Results VOAs by GC/MS Method 8260CI5030C Units: )lg/L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 105 80-123 106 80-124 98.8 80-125 98.9 Report Date: 11/19/2010 Page 10 ofl5 All analyses applicable to the CWA, SDWA, and RCRA are perfonned in accordance to NELAC protocols. Pertinent sampling information is located on the aLLached COCo This report is provided for the exclusive use of the addressee, Privileges of subsequent use ofthe name of this company or any metnber of its starr, or reproduction of this report in connection with the advertisement, promotion or sale orany product or process, or in connection with the re-publication of this report [or any purpose other than for the addressee will be granted only on contact. This company accepts no responsibility except for the due per[omlance o[ inspection andlor analysis in good faith and according to the rules ofLhe trade and of science. EI\ERGY /\bOr-i'bl Ol-.ll:_~; www.8IIeI.gylab.com AM/ytkM EmIIal:I sma 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 8&&-18&-7175 • Rapid City, SD 888-&12-1225 • College Slalion, lX 888-&90-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Project: 4th Quarter-Semi-Annual Groundwater LablD: C1 011 0505-007 Client Sample ID: MW65 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS -DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLIDES -DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result Units ND mg/L 480 mg/L 518 mg(L 31 mg(L 0.18 mg(L 219 mg(L 1.01 mg(L ND mg/L 14.5 mg(L 224 mg/L 2410 mg(L 7.22 S.u. 3730 mg/L ND ug(L ND ug(L 0.81 ug(L ND ug(L 38 ug(L ND ug(L 6190 ug(L ND ug(L 4760 ug(L ND ug(L ND ug/L 48 ug/L ND ug/L ND ug(L ND ug(L ND ug/L 2.05 ug/L ND ug/L 76 ug(L 1.4 pC ilL 0.1 pCi(L 0.1 pCifL MDC -Minimum detectable concentration Report Date: 12/29/10 Collection Date: 11/10/10 13:20 DateReceived: 11/12/10 Matrix: Aqueous MCLI Qualifiers RL QCL Method Analysis Date 1 By D D D A2320 B 11/13/10 02:421 jba A2320 B 11/13/10 02:421 jba E200.7 12/06(1012:41 1 cp A4500-CI B 11(16/10 09:34( Ir 0.10 A4500-F C 11(12/1013:371 jba 0.5 E200.7 12(06(10 12:41 1 cp 0.05 A4500-NH3 G 11/17/1016:22 (dc 0.1 E353.2 11(12(1016:25 (dc 0.5 E200.7 12106(1012:41/cp 1 E200.7 12(06(1012:41 (cp 50 A4500-S04 E 11(16(1014:18 (Ir 0.01 A4500-H B 11/12/10 15:47(lr 10 A2540 C 11(12/10 15:101lr 5.0 E200.8 11(20(1009:03 (sml 0.50 E200.8 11/20/1009:03 (sml 0.50 E200.8 11(20(1009:03 (sml 25 E200.B 11 (20(1 0 09:031 sml 10 E200.B 11 (20/1 0 09:031 sml 10 E200.B 11(20(1009:03 (sml 30 E200.7 12(01(10 16:29 ( cp 1.0 E200.B 11/20(10 09:03 ( sml 10 E200.B 11/20/10 09:03 ( sml 0.50 E200.8 11/20/1009:03 (sml 10 E200.8 11(20(1009:03 (sml 20 E200.8 11(20/1009:03 (sml 5.0 E200.8 11(20(10 09:03 (sml 10 E200.B 11 (30(1 0 03:03 ( sml 0.50 E200.B 11 (20(1 0 09:031 sml 100 E200.B 11/20(1009:031 sml 0.30 E200.B 11 (20(1 0 09:031 sml 15 E200.8 11 (20(1 0 09:03 ( sml 10 E200.8 11/20(1009:03 (sml E900.1 02(22111 22 :32 ( ep E900.1 02(22(11 22:32 ( ep E900.1 02(22/11 22:32 ( ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 15 of 38 EN:RGY A· 81.J\I OHII ~ www.energylab.com AM/f*tfI~ SIIIu 1m Helena, MT 877·472-0711 • Billings, MT 800·735-4489 • Casper, WY 888·235·D515 Gillette, WY 86&·186·7175 • Rapid City, SO 888·672·1225 • College Station, IX 888-690·2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/29/10 Collection Date: 11/10/10 1 3 :20 DateRecelved: 11/12/10 Matrix: Aqueous Client: Denison Mines USA Corp Project: Lab ID: 4th Quarter-Semi-Annual Groundwater C1 011 0505-007 Client Sample ID: MW 65 Analyses DATA QUALITY NC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichiorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result Units -4.24 % 58.9 meq/L 54.1 meq/L 3660 mg/L 1.02 ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L 106 %REC 106 %REC 101 %REC 98.0 %REC MCU Qualifiers RL QCL Method Analysis Date 1 By Calculation 12109/10 15:54 1 kbh Calculation 12/09/10 15:541 kbh Calculation 12/09/10 15:54 1 kbh Calculation 12/09/10 15:54 1 kbh Calculation 12109/10 15:54 1 kbh 20 SW8260B 11/19/1019:551 rmh 1.0 SW8260B 11/19/10 19:55/rmh 1.0 SW8260B 11119/1019:551 rmh 1.0 SW8260B 11/19/10 19:55/rmh 1.0 SW8260B 11 /19/10 19:55 /rmh 20 SW8260B 11/19/1019:551 rmh 1.0 SW8260B 11/19/1019:551 rmh 1.0 SW8260B 11/19/10 19:551 rmh 1.0 SW8260B 11/19/10 19:551 rmh 1.0 SW8260B 11/19/10 19:55/rmh 80-120 SW8260B 11/19/10 19:55/rmh 70-130 SW8260B 11/19/1 0 19 :55 1 rm h 80-120 SW8260B 11/19/10 19:55 1 rmh 80-120 SWB260B 11/19/1019:551 rmh MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 16 of 38 A AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter -Semiannual Groundwater 1011452-006A Client Sample ID: MW-70 Collection Date: 11118/2010 1140h Received Date: Method Used: 11123/2010 1025h SW8260C Contact: Jo Ann Tischler Analyzed: 11124/2010 2104h Analytical Results VOAs by GCIMS Method 8260CIS030C Units: ~g!L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 111 80-123 107 80-124 103 80-125 98.6 Report Date: 11/29/2010 Page 9 of27 All analyses applicable to the CWA, SDWA, and ReRA arc performed in accordance to NELAC protocols. Pertinent sampling information is located on the attached CDC. This report is provided for the exclusive use of the addressee. Privileges of subsequent use of the name of this company or any member of its stafr, or reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in cOTUlection with the Te-publication of this report for any purpose other than faT the addressee will be granted only on contRct. This company accepts no responsibility except for the due performance of inspection and/or analysis in good faith and according to the rules of the trade and or science. EN:RGY '''H()I~j\'~'I~1 .~ www.eneraylab.com AIIfTI/t:II E#IIIau JIIlcI rm Helena, MT 877-412-0711 • Billings, MT 800-135-4489 • Casper, WY 881-235-0515 GiIIBtta, WY 116-111-7175 • Rapid City, SD 118-&72-1225 • College Station, TX 818-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 LablD: C1 011 0844-006 Client Sample ID: MW70 Analyses MAJOR IONS Carbonate as C03 Bicarbonate as HC03 Calcium Chloride Fluoride Magnesium Nitrogen, Ammonia as N Nitrogen, Nitrate+Nitrite as N Potassium Sodium Sulfate PHYSICAL PROPERTIES pH Solids, Total Dissolved TDS @ 180 C METALS -DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt \ Copper{ Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc RADIONUCLIDES -DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Report Defln ltions: RL -Analyte reporting limit. QCL -Quality control limit. Result ND 467 566 53 0.22 127 0.09 ND 9.6 177 1950 7.88 3160 ND ND ND ND ND ND 118 ND 68 ND ND ND ND ND 3.63 ND 43.4 ND ND 0.7 0.6 0.8 Units mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L s.u. mgIL ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L pCi/L pC ilL pC ilL MDC -Minimum detectable concentration U -Not detected at minimum detectable concentration Report Date: 01/06/11 Collection Date: 11/18/10 11 :40 DateReceived: 11/23/10 Matrix: Aqueous MCLI Qualifiers RL QCL Method Analysis Date 1 By D D D U A2320 B 11/23/10 20:171 jba A2320 B 11/23/1020:171 jba E200.7 12116/10 16:15/cp A4500-CI B 12115/10 15:22 /lmc 0.10 A4500-F C 12101/10 10:17 1 jba 0.5 E200.7 12116/1016:151 cp 0.05 A4500-NH3 G 11/29/10 13:251 dc 0.1 E353.2 11/24/10 13:441 dc 0.5 E200.7 12116/10 16:15/cp E200.7 12116/10 16:15/cp 50 A4500-S04 E 11/30/10 12:20 Ilr 0.01 A4500-H B 11/24/1011 :06 /lr 10 A2540 C 11/23/10 16:46/1r 5.0 E200.8 12122110 12:461 sml 0.50 E200.8 12122110 12:46 1 sml 0.50 E200.8 12122110 12:46 1 sml 25 E200.8 12122110 12:461 sml 10 E200.8 1212211012:461 sml 10 E200.8 12122110 12:461 sml 30 E200.7 12116/10 16:15/cp 1.0 E200.8 12122110 12:461 sml 10 E200.8 1212211012:461 sml 0.50 E200.8 12122110 12:461 sml 10 E200.8 1212211012:461 sml 20 E200.8 12122110 12:46 1 sml 5.0 E200.8 12122110 12:46 1 sml 10 E200.8 1212211012:461 sml 0.50 E200.8 1212211012:461 sml 100 E200.8 12122110 12:461 sml 0.30 E200.8 1212211012:461 sml 15 E200.8 1212211012:461 sml 10 E200.8 1212211012:461 sml E900.1 12102110 12:45 1 ep E900.1 12102110 12:451 ep E900.1 12102110 12:451 ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 13 of 36 EN:RGY : ;'\'~C)H.\I :""Ill ~ www.energylab.com AMlyflallIuIIIa SIIu 'IU Helens, MT 811-412-0711 • Billings, MT 800-735-4489 • Casper, WV 88 .... 235-0515 Gillette, WY 816-686-1115 • Rapid City, SD 888-112-1225 • Colloge Station, 1X 88 .... 690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp Semi-Annual Groundwater 2010 C10110844-006 Client Sample 10: MW 70 Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofiuoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Defin Itlons: RL -Analyte reporting limit. QCL -Quality control limit. Result -3.15 49.7 46.6 3120 1.01 NO NO NO NO NO NO NO NO NO NO 102 99.0 100 99.0 Units % meq/L meq/L mg/L ug/L ugIL uglL uglL uglL uglL uglL ug/L ug/L uglL %REC %REC %REC %REC Qualifiers Rl 20 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 80-120 70-130 80-120 80-120 Report Date: 01/06/11 Collection Date: 11/18/10 11 :40 DateReceived: 11/23/10 Matrix: Aqueous MCU QCl Method Analysis Date 1 By Calculation 12123/1007:191 kbh Calculation 12123/10 07:191 kbh Calculation 12123/10 07:191 kbh Calculation 12123/10 07:191 kbh Calculation 12123/1007:191 kbh SW8260B 12101/1018:281 ilr SW8260B 12101/1018:281 ilr SW8260B 12101/1018:281 ilr SW8260B 1210111 0 18:281 ilr SW8260B 12101/1018:281 ilr SW8260B 12101/10 18:281 ilr SW8260B 12101/10 18:281 ilr SW8260B 12101/10 18:281 ilr SW8260B 12101/10 18:281 ilr SW8260B 12101/10 18:281 ilr SW8260B 12101/10 18:281 ilr SW8260B 12101/10 18:281 ilr SW8260B 12101/10 18:281 ilr SW8260B 12101/10 18:28/jlr MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 14 of 36 A AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter-Semiannual Groundwater 10 11246-008A Client Sample ID: Trip Blank Collection Date: 1119/2010 Received Date: Method Used: 1111212010 1000h SW8260C Contact: Jo Ann Tischler Analyzed: 11117/2010 1410h Analytical Results VOAs by GCIMS Method 8260C/S030C Units: Ilg/L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qua] 1.00 < 1.00 77-144 106 80-123 106 80-124 98.4 80-125 98.9 Report Date: 11119/2010 Page 11 of 15 All analyses applicable to the CW A, SDWA. and ReRA are performed in accordance to NELAC prolocols. Pertinent sampling information is located on the attached COCo This report is provided for the exclusive use of the addressee. Privileges of subsequent use of the name of this company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection with the fe-publication orthis report. for any purpose oilier than for the addressee will be granted only on contact. This company accepts no responsibility except for the due performance of inspection and/or analysis in good faith and according to the rules oftbe trade and of science. A AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter-Semiannual Groundwater 1011302-006A Client Sample ID: Trip Blank Conection Date: 1111112010 Received Date: Method Used: 11/16/2010 0945h SW8260C Contact: Jo Ann Tischler Analyzed: 11/17/2010 1642h Analytical Results VOAs by GCIMS Method 8260CI5030C Units: ~glL Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 111 80-123 104 80-124 100 80-125 97.5 Report Date: 11/22/2010 Page 9 of 13 All analyses applicable to the CWA, SDWA, and ReRA are perfonned in accordance to NELAC protocols. Pertinent sampling infonnalion is located on the Bttached CDC. This report is provided fOT the exclusive use of the addressee. Privileges of subsequent use ofthe name of this company or any member of ils sla1T. or reproduction of this report in connection with the advertisement, promotion or s81e of any product or process, or in conneclion with lhe re-publication oflhis report for any purpose other than for the addressee will be granted only on contact This company accepts no responsibility except for the due performance of ins peel ion andlor analysis in good faith and according to the rules orthe trade and of science . A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter-Semiannual Groundwater 1011399-006A Client Sample ID: Trip Blank Collection Date: 11115/2010 Received Date: Method Used: 11119/2010 1030h SW8260C Contact: Jo Ann Tischler Analyzed: 11122/2010 1059h Analytical Results VOAs by GCIMS Method 8260CI5030C Units: Ilg/L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-dB CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 122 80-123 104 80-124 104 80-125 95.4 Report Date: 1112312010 Page 9 of25 All analyses applicable to the CWA, SDWA, and RCRA are perfonned in accordance to NELAC protocols. Pertinent sampling infonnation is located on tbe allached COCo This report is provided for the exclusive use of the addressee. Privileges of subsequent use of the name of this company or any member of its staff, or reproduction of this report in connecLion with the advertisement, promotion or sale of any product or process. or in connection with lhe re-publication of this report for any purpose other than for (he addressee will be granted only 00 contact, This company accepts no responsibility except for the due perfonnance ofinspection andlor ana1ysis in good faith and according to the rules of the lrade and or science. A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, VT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter -Semiannual Groundwater 1011452-007 A Client Sample ID: Trip Blank Collection Date: 11118/2010 Received Date: Method Used: 11123/2010 1025h SW8260C Contact: Jo Ann Tischler Analyzed: 11/24/2010 2123h Analytical Results VOAs by GC/MS Method 8260CI5030C Units: ~gIL Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 111 80-123 106 80-124 103 80-125 98.8 Report Date: 1112912010 Page 10 of27 AU analyses applicable to the CW ~ SDWA, and RCRA lirc performed in accordance to NELAC protocols. Pertinent sampling information is located on the attached COCo This report is provided for the exclusive use of the addressee. Privileges of subsequent use orthe name of this company OT any member of its staff, or reproduction ofthis report. in connection with the advertisement, promotion or sale of any product or process, or in connection with the re-publication of lhis report for any purpose olher than for the addressee will be gmnled only on contact. This company accepts no responsibility Cjltccpl for the due performance of inspection andlor analysis in good faith and according to the rules orlhe trade and of science. A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter Semi Annual Ground Water 1011479-004A Client Sample ID: Trip Blank Collection Date: 11122/2010 Received Date: Method Used: 11124/2010 1040h SW8260C Contact: Jo Ann Tischler Analyzed: 11127/2010 2211h Analytical Results VOAs by GC/MS Method 8260C/S030C Units: J.lg/L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 111 80-123 106 80-124 102 80-125 98.3 Report Date: 121712010 Page 7 of21 AU analyses applicable to llIe CWA, SDWA, and RCRA are perfonned in accordance to NELAC protocols. Pertinent sampling infonnation is located on the attached COCo This report is provided for the exclusive usc of the addressee. Privileges of subsequenl use of the name of this company or any member of ils staff, or reproduction of this report in connection with the advertisemenl, promolion or sale of any product or process, or in connection wi~h the r~:publie~tion .ofth~s.'cpo~ for any purpose other llIan for the addressee will be granted only on eontaeL This company accepts no responsibility except forthe due performance or inspection and/or analysis in good faith A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: D~nison Mines 4th Quarter-Semiannual Groundwater 1011504-003A Client Sample ID: Trip Blank Collection Date: 11126/2010 Received Date: Method Used: 11130/2010 1005h SW8260C Contact: Jo Ann Trschler Analyzed: 11130/2010 1437h Analytical Results VOAs by GCIMS Method 8260C/S030C Units: J.1g/L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dich1oroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 114 80-123 107 80-124 104 80-125 97.4 Report Date: 12/S/2010 Page6of17 All analyses applicable to the CW A, SDWA, and RCM are performed in accordance to NELAC protocols, Pertinent sampling information is located on the attached CDC. This report is provided for the exclusive usc of the addressee. Privileges or subsequent use of the name of this company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection WiL.h the r~-publication .oflh!s report for B.ny purpose oLher than for the addressee will be gran Led only on contact This company accepls no responsibiliLy except for lhe due performance ofLnspection and/or analysis in good faith A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 4th Quarter-Semiannual Groundwater 1012066-002A Client Sample ill: Trip Blank Collection Date: 121112010 Received Date: Method Used: 12/312010 1000h SW8260C Contact: Jo Ann Tischler Analyzed: 12/4/2010 0040h Analytical Results VOAs by GC/MS Method 8260C/5030C Units: Ilg/L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 CAS Number 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 Reporting Analytical Limit Result Qual 1.00 < 1.00 77-144 115 80-123 106 80-124 104 80-125 96.5 Report Date: 12114/2010 Page 5 of 15 All aoalyses applicable to the CWA, SDWA, and RCRA are performed in accordance to NELAC protocols. Pertinent sampling infonnation is located on the attached cae Tbis report is provided for the exclusive usc of the addressee. Privileges of subsequent use of the name of this company or any member of its staff, OT reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection with the re·publieation of this report for a.ny purpose other than for the addressee will be granted only on contact. This company accepts no responsibiUty except for the due perfonnance of inspection andlor analysis in good faith and according to the rules of the trade and of science. EN:RGY 1\:·OJ." .. ..,OHil !J www.energylab.com AIuIytkM~ SIIa 11M Helena, MT 877-472-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 Gillette, WY 886-186-7175 • Rapid City, so 888-&72-1225 • College Station, IX 888-&90-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Project: Lab 10: 4th Quarter-Semi-Annual Groundwater C1 011 0505-008 Client Sample 10: Trip Blank Analyses VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCl -Quality control limit. Result Units ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/L ND ug/l ND ug/L ND ug/l 107 %REC 90.0 %REC 103 %REC 103 %REC Report Date: 12/29/10 Collection Date: 11/10/10 DateRecelved: 11/12/10 Matrix: Aqueous MCL! Qualifiers RL QCL Method Analysis Date 1 By 20 SWB260B 11/19/1014:41/rmh 1.0 SWB260B 11/19/1014:411 rmh 1.0 SWB260B 11/19/1014:41/ rmh 1.0 SWB260B 11/19/1014:411 rmh 1.0 SWB260B 11/19/1014:411 rmh 20 SWB260B 11/19/1014:41/rmh 1.0 SWB260B 11/19/1014:41/rmh 1.0 SW8260B 11/19/1014:411 rmh 1.0 SW8260B 11/19/1014:41/rmh 1.0 SWB260B 11/19/1014:41/rmh BO-120 SW8260B 11/19/1014:41/rmh 70-130 SWB260B 11/19/1014:411 rmh 80-120 SW8260B 11/19/1014:411 rmh 80-120 SWB260B 11/19/10 14:41 1 rmh MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 17 of 38 EN:RGY . I\B()HA,TOI ill <..1 www.energylab.com M.tytia/ Etulllll&l SIRe. rm Helena, MT 871-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 866-686-7175 · Rapid City, SO 888-672-1225 • College Station, 1X 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/08/10 Collection Date: 11/12/10 12:20 DateReceived: 11/16/10 Matrix: Aqueous Client: Project: Lab ID: Denison Mines USA Corp Semi Annual Groundwater C1 011 0584-006 Client Sample ID: Trip Blank Analyses VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-0ichlorobenzene-d4 Surr: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result NO NO NO NO NO NO NO NO NO NO 108 117 99.0 98.0 MCll Units Qualifiers Rl QCl Method Analysis Date 1 By ug/l 20 SW8260B 11/24/1 0 00: 12 1 rm h ug/L 1.0 SW8260B 11/24/1000:121 rmh ug/L 1.0 SW8260B 11/24/1000:12/rmh ug/L 1.0 SW8260B 11/24/1000:121 rmh ug/L 1.0 SW8260B 11/24/1000:121 rmh ug/L 20 SW8260B 11/24/1000:121 rmh ug/L 1.0 SW8260B 11/24/1000:12/rmh ug/L 1.0 SW8260B 11/24/1000:12/rmh ug/L 1.0 SW8260B 11/24/1000:12/rmh ug/L 1.0 SW8260B 11/24/1000:12/rmh %REC 80-120 SW8260B 11/24/10 00:121 rmh %REC 70-130 SW8260B 11/24/1000:121 rmh %REC 80-120 SW8260B 11/24/1000:12/rmh %REC 80-120 SW8260B 11/24/1000:121 rmh MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 13 of 32 EI\ERGY • AElOI1/\ I O flH S Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 86&-18&·7175 • Rapid City, SD 888·&72·1225 • Collage Station, 1X 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/30/10 Collection Date: 11/17/1012:55 DateReceived: 11/19/10 Matrix: Aqueous Client: Project: LablD: Denison Mines USA Corp Semi-Annual Groundwater 2010 Cl 011 0730-007 Client Sample ID: Trip Blank Analyses VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-0ichlorobenzene-d4 Surr: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result NO NO NO NO NO NO NO NO NO NO 110 107 94.0 100 MCL! Units Qualifiers Rl QCl Method Analysis Date 1 By ug/l 20 SW8260B 11/24/1003:161 rmh ug/L 1.0 SW8260B 11/24/1003:161 rmh ug/L 1.0 SW8260B 11/24/1003:161 rmh ug/L 1.0 SW8260B 11/24/1003:16/rmh ug/L 1.0 SW8260B 11/24/10 03:16/ rmh ug/L 20 SW8260B 11/24/1003:161 rmh ug/L 1.0 SW8260B 11/24/1003:161 rmh ug/L 1.0 SW8260B 11/24/1003:161 rmh ug/L 1.0 SW8260B 11/24/1003:161 rmh ug/L 1.0 SW8260B 11/24/10 03:161 rmh %REC 80-120 SW8260B 11/24/10 03:161 rmh %REC 70-130 SW8260B 11/24/1003:16/rmh %REC 80-120 SW8260B 11/24/10 03:161 rmh %REC 80-120 SW8260B 11/24/10 03:161 rmh MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 15 of 34 EN:RGY ! .'HOPI", I UI ~1 So www.energylab.com AuIy/II:II ExuIIHu SInu rlSZ Helena, MT 871-472-0111 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gilletta, WV 888-886-1115 • Rapid City, SD 118-812-1225 • College Station, 1X 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: LablD: Denison Mines USA Corp Semi-Annual Groundwater 2010 C1 011 0844-008 Client Sample ID: Trip Blank Analyses VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-0ichlorobenzene-d4 Surr: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. Result NO NO NO NO NO NO NO NO NO NO 98.0 109 101 98.0 Units uglL uglL uglL ug/L ug/L ug/L uglL uglL uglL uglL %REC %REC %REC %REC Qualifiers RL 20 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 80-120 70-130 80-120 80-120 Report Date: 01/06/11 Collection Date: 11/18/10 DateReceived: 11/23/10 Matrix: Aqueous MCL! QCL Method Analysis Date 1 By SW8260B 12101/1023:181 jlr SW8260B 12101/1023:181 jlr SW8260B 12101/10 23:181 jlr SW8260B 12101/1023:181 jlr SW8260B 12101/1023:181 jlr SW8260B 12101/1023:181 jlr SW8260B 12101/1023:181 jlr SW8260B 12101/10 23:181 jlr SW8260B 12101/10 23:18/jlr SW8260B 12101/10 23:181 jlr SW8260B 12101/1023:181 jlr SW8260B 12101/10 23:181 jlr SW8260B 12101/10 23:181 jlr SW8260B 12101/1023:181 jlr Mel -Maximum contaminant level. NO -Not detected at the reporting limit. Page 16 of 36 EN:RGY )\ • .., r ) I. /. I . ~ I ~: • www.energyiab.com AII/ftII:6I ~ SIIIU lat Helena, MT 877-472-0711 • Billings, MT 801-735-4489 . Casper, WV 188-235-0515 Gilletta, WV 11&-186-7175 • Rapid City, SIlIII-612-1225 • College Station, TX 118-690-2211 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp Semi-Annual Groundwater 2010 C1 011 0870-004 Client Sample 10: Trip Blank Analyses VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-0ichlorobenzene-d4 Surr: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. Result NO NO NO NO NO NO NO NO NO NO 100 110 96.0 100 Units uglL uglL uglL ug/l ug/l ug/l ug/l ugll ugll ugll %REC %REC %REC %REC Qualifiers RL 20 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 80-120 70-130 80-120 80-120 Report Date: 12/30/10 Collection Date: 11/22/1 0 DateReceived: 11/24/1 0 Matrix: Aqueous MCU QCL Method Analysis Date I By SW8260B 12102110 01 :07 / ilr SW8260B 12102110 01 :07 / ilr SW8260B 12102110 01 :07 / ilr SW8260B 12102110 01 :07 I ilr SW8260B 12102110 01 :07 / ilr SW8260B 12102110 01 :07 / ilr SW8260B 12102110 01 :07 I ilr SW8260B 12102110 01 :07 I ilr SW8260B 12102110 01 :07 / ilr SW8260B 12102110 01 :07 I ilr SW8260B 12102110 01 :07 I ilr SW8260B 12102110 01 :07 I ilr SW8260B 12102110 01 :07 / ilr SW8260B 12102110 01 :07 / ilr MCl -Maximum contaminant level. NO -Not detected at the reporting limit. Page 90f27 EN:RGY I ,\ ,1)[ ) 1 ' .... rJI ,- www.energylab.com AaIytI&a/ ExuIIrtln SInA 1m Helena, MT 811-412-0111 • Billings, MT 800-135-4489. Casper, WY 881-235-0515 Gillette, 'NY '1&-181-1175 • Rapid City, SI) '18-672-1225 • College Station, 1X 881-19D-221 8 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp Semi-Annual Groundwater 2010 C1 011 0928-003 Client Sample 10: Trip Blank Analyses VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-0ichlorobenzene-d4 Surr: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-dS Report Defin itions: RL -Analyte reporting limit. QCL -Quality control limit. Result NO NO NO NO NO NO NO NO NO NO 9S.0 112 96.0 9S.0 Units ug/l ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L %REC %REC %REC %REC Qualifiers Rl 20 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 SO-120 70-130 SO-120 SO-120 Report Date: 01/06/11 Collection Date: 11/29/1 0 DateReceived: 11/30/1 0 Matrix: Aqueous MCll QCl Method Analysis Date 1 By SWS260B 12/02110 02:571 ilr SWS260B 12/02/10 02:571 ilr SWS260B 12/02/10 02:571 ilr SWS260B 12102/10 02:571 ilr SWS260B 12102/10 02:57 1 ilr SWS260B 12/02/10 02:57 1 ilr SWS260B 12/02110 02:57 1 ilr SWS260B 12102/10 02:57 1 ilr SWS260B 12102/10 02:571 ilr SWS260B 12102110 02:571 ilr SWS260B 12102110 02:57 1 ilr SWS260B 12102/10 02:57 1 ilr SWS260B 12102110 02:571 ilr SWS260B 12/02110 02:571 jlr MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 7 of 25 EN:RGY .0- A F10r"'I' .. IOnll S WYIW.energylab.com AAI/fIkII fXulllII£f SIn. 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 868-&86-7175 • Rapid Ci1y, so 888-&12-1225 • College Station, IX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Project: Lab 10: Denison Mines USA Corp Semi-Annual Groundwater 2010 C1 0120105-002 Client Sample 10: Trip Blank Analyses VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-0ichlorobenzene-d4 Surr: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. Result NO NO NO NO NO NO NO NO NO NO 96.0 110 99.0 95.0 Units ug/L ug/L ug/L ug/l ug/L ug/l ug/L ug/L ug/l ug/l %REC %REC %REC %REC Report Date: 01/10/11 Collection Date: 12/01/10 DateReceived: 12/03/10 Matrix: Aqueous MCU Qualifiers RL QCl Method Analysis Date I By 20 SW8260B 12/10/10 17:49 1 ilr 1.0 SW8260B 12110/1017:49/ ilr 1.0 SW8260B 12/10/10 17:491 ilr 1.0 SW8260B 12/10/1017:491 ilr 1.0 SW8260B 12/10/1017:491 ilr 20 SW8260B 12110/10 17:49 1 ilr 1.0 SW8260B 12/10/1017:491 ilr 1.0 SW8260B 12/10/10 17:49 1 ilr 1.0 SW8260B 12/10/10 17:491 ilr 1.0 SW8260B 12/10/1017:491 ilr 80-120 SW8260B 12/10/10 17:491 ilr 70-130 SW8260B 12/10/1017:491 ilr 80-120 SW8260B 12/10/1017:491 ilr 80-120 SW8260B 12/10/1017:491 ilr MCl -Maximum contaminant level. NO -Not detected at the reporting limit. Page 5 of 22 EI\ERGY __ 1\\ .011./\1010'11 .: www.anergylab.com AuIyIIM bufIfta SIIu '151 Halena, liT 877-472-D711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 886-188-7175 . Rapid City, SD 888-672-1225 • Coli ega station, IX 888-&90-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Project: LablD: Denison Mines USA Corp 4th Quarter-Semi-Annual Groundwater C1 011 0505-009 Client Sample 10: Temp Blank Analyses PHYSICAL PROPERTIES Temperature Report Definitions: Rl -Analyte reporting limit. QCl -Quality contrallimit. Result Units 3.0 Report Date: 12/29/10 Collection Date: 11/10/10 DateRecelved: 11/12/10 Matrix: Aqueous MCU Qualifiers Rl QCl Method Analysis Date 1 By E170.1 11/12/1009:201 kbh MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 18 of 38 EN:RGY • A\;OI It'\.JOI~lr ~ www.energylab.com Mllltlal Clelfll«. SIIc. 1m Helena, MT 877-472-0711 • Billings, MT 80D-735-4489 • Casper, WY 888-235-0515 Gillette, WY 816-188-7175 • Rapid City, SD 888-&72-1225 • Collage Station, IX 888-&9D-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/08/10 Collection Date: 11/12/10 12 :20 DateReceived: 11/16/10 Matrix: Aqueous Client: Project: Lab ID: Denison Mines USA Corp Semi Annual Groundwater C1 011 0584-007 Client Sample ID: Temp Blank Analyses PHYSICAL PROPERTIES Temperature Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. Result Units 3.0 MCU Qualifiers RL QCL Method Analysis Date I By E170.1 11/16/10 09: 1 0 / kbh MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 14 of 32 EI\ERGY .I\HOn.r"'On n:::s www.energyiab.com AMIyfIatI CxcI*M:t Ska 1st Helena, MT B77-472-0711 • Billings, MT 800·735·4489 • Casper, WY 888-235-0515 Gillette, WY 866·IB6-7175 • Rapid City, SD 888·672·1225 • CDllage StatiDn, TX 888-6811-221 a LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/30/10 Collection Date: 11/17/10 12:55 DateReceived: 11/19/10 Matrix: Aqueous Client: Project: Lab 10: Denison Mines USA Corp Semi-Annual Groundwater 2010 C1 011 0730-008 Client Sample 10: Temp Blank Analyses PHYSICAL PROPERTIES Temperature Report Definitions: Rl -Analyte reporting limit. QCL -Quality control limit. Result Units 2.0 MCL! Qualifiers RL QCL Method Analysis Date 1 By E170.1 11/1911009:301 kbh MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 16 of 34 EN:RGY I f\f-H .. H~"\I ,,=,,1..JJr ~. www.energylab.com AuIy/Ia/~SIIcI 'lSI Helena, MY 877-472-0711 • Billings, MY 800-135-4489 • Casper, WY 888-235-0515 Gillette, WY 88&-186-7175 • Rapid City, SD 888-672-1225 • CollBge Station, TX 881-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp Semi-Annual Groundwater 2010 C1 011 0844-007 Client Sample ID: Temp Blank Analyses PHYSICAL PROPERTIES Temperature Report Delln it Ions : Rl -Analyte reporting limit. QCl -Quality control limit. Result Units 2.0 Qualifiers Rl Report Date: 01/06/11 Collection Date: 11/18/1 0 DateReceived: 11/23/10 Matrix: Aqueous MCll QCl Method Analysis Date I By E170.1 11/23/10 12:151 kbh MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 15 of 36 EI\ERGY 1\ '1-' }I~ /\ I . " JJ " www.energylab.com AIII/fIII:II ErAItMcI sac. rm Helen., MT 817-472-0111 • Billings, MT 800-135-4489 • Casper, WV 888-235-0515 Gillette, WY 88&-88&-7175 • Rapid City, Sil 888-672-1225 • College Station, IX 888-&90-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: LablD: Denison Mines USA Corp Semi-Annual Groundwater 2010 C1 011 0870-005 Client Sample ID: Temp Blank Analyses PHYSICAL PROPERTIES Temperature Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. Result Units 3.0 Qualifiers Rl Report Date: 12/30/10 Collection Date: 11/22/1 0 DateReceived: 11/24/10 Matrix: Aqueous MCll QCl Method Analysis Date 1 By E170.1 11/24/10 00:001 kbh MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 10 of 27 EI\ERGY I I '-:1_"1-;/ I .):-11_ <-;;: www.energylab.com AMIJfIaI ExuIIHI:t .. rm Helena, MT 877-472-0711 • Billings, MT 800-735-4489. Casper, WY 888-235-0515 GII/atta, WY 8B&-B8&-7175 • Rapid City, SD 118-672-1225 • College Station, 1X 888-&90-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp Semi-Annual Groundwater 2010 C1 011 0928-004 Client Sample 10: Temp Blank Analyses PHYSICAL PROPERTIES Temperature Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. Result Units 2.0 Qualifiers Rl Report Date: 01/06/11 Collection Date: 11/29/10 DateReceived: 11/3011 0 Matrix: Aqueous MCll QCl Method Analysis Date 1 By E170.1 11/30/10 08 :50 1 kbh MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 8 of 25 EN:RGY A:-:Or;ATOnU s www.energylab.com AMJyt/I:.t ExuUMls:lShIe. 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 GillBtte, WY 866-686-7175 • Rapid City, so 888-612-1225 • College Station, IX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Project: Lab ID: Denison Mines USA Corp Semi-Annual Groundwater 2010 C1 01201 05-003 Client Sample ID: Temp Blank Analyses PHYSICAL PROPERTIES Temperature Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. Result Units 3.0 Report Date: 01/10/11 Collection Date: 12/01/10 DateReceived: 12/03/10 Matrix: Aqueous MCL! Qualifiers Rl QCl Method Analysis Date 1 By E170.1 12/03/10 09 :30 1 kbh MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 6 of 22 A Jo Ann Tischler Denison Mines 1050 17th Street, # 950 AMERICAN Denver, CO 80265 WEST TEL: (303) 389-4132 ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer RE: 4th Quarter-Semiannual Groundwater Dear Jo Ann Tischler: Lab Set ID: 1011246 American West Analytical Laboratories received 8 sample(s) on 11/12/2010 for the analyses presented in the following report. All analyses were performed in accordance to The NELAC Institute protocols unless noted otherwise. American West Analytical Laboratories is certified by The NELAC Institute in Utah and Texas; and is state certified in Colorado and Idaho. Certification document is available upon request. If you have any questions or concerns regarding this report please feel free to call. The abbreviation "Surr" found in organic reports indicates a surrogate compound that is intentionally added by the laboratory to determine sample injection, extraction, andlor purging efficiency. The "Reporting Limit" found on the report is equivalent to the practical quantitaion limit (PQL). This is the minimum concentration that can be reported by the method referenced and the sample matrix. The reporting limit must not be confused with any regulatory limit. Analytical results are reported to three significant figures for quality control and calculation purposes. Thank: You, Approved by: Digitally signed by Jose G. J 0 S e G ~~~~~=Jose G. Rocha, • o=American West Analylical Laboratories, ou=Quality Assurance Officer, Roc h a ~:~tjOSe@awal.labs.com, Oat.: 2010.11.2211:11:38 -07'00' Laboratory Director or designee Report Date: 1111912010 Page 1 ofl5 All analyses applicable to the CW A, SDWA. and ReRA are perfonned in accordance 10 NELAC protocols. Pertinent sampling infonnalion is located on the attached CDC. This report is provided for the exclusive use of the addressee. Privileges of subsequent use of the name of this company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection with the re·publicalion of this report [or any purpose other than for the addressee will be granted only on contact This company accepts no responsibility except [or the due performance of in spec Lion and/or analysis in good faith and according to the rules ofLhe trade and of science. A SAMPLE SUMMARY AMERICAN Client: Denison Mines Contact: Jo Ann Tischler WEST Project: 4th Quarter-Semiannual Groundwater Lab SetID: 1011246 ANALYTICAL Date Received: 11112/2010 1000h LABORATORIES Lab Sample ID Client Sample ID Date Collected Matrix Analysis 1011246-001A MW-14 11110/2010 lSlSh Aqueous VOAbyGC/MS 463 West 3600 South Method 8260C/S030C Salt Lake City, UT 1011246-002A MW-2S 11110/2010 1220h Aqueous VOAby GC/MS 84115 Method 8260C/S030C 1011246-003A MW-29 1119/2010 IS0Sh Aqueous VOAby GC/MS Method 8260C/S030C 1011246-004A MW-30 1119/2010 1220h Aqueous VOAbyGC/MS (801) 263-8686 Method 8260C/S030C Ton Free (888) 263-8686 1011246-00SA MW-31 1119/2010 1430h Aqueous VOAbyGC/MS Fax (801)263-8687 Method 8260C/S030C email: awal@awal-labs.com 1011246-006A MW-32 11110/2010 1320h Aqueous VOAbyGC/MS Method 8260C/S030C Kyle F. Gross 101l246-007A MW-6S 11110/2010 1320h Aqueous VOAby GC/MS Method 8260C/S030C Laboratory Director 1011246-008A Trip Blank 1119/2010 Aqueous VOAbyGC/MS Method 8260C/S030C Jose Rocha QA Officer Report Date: 11/19/2010 Page 2 of15 All analyses applicable La the CW A, SDWA, and RCRA are perfonned in accordance to NELAC prolocols. Pertinent sampling inrormation is located on the attached COCo This report is provided for the exclusive usc of the addressee. Privileges of subsequent use of the name of this company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection with tho re-publication of lhis report for any purpose other than for the addressee will be granted only on contact This company accepts no responsibility except for the due performance of inspection andlor analysis in good faith and according to the rules of the trade and of science. A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Volatile Case Narrative Client: Contact: Denison Mines Jo Ann Tischler Project: Lab SetID: Sample Receipt Information: Date of Receipt: Date(s) of Collection: Sample Condition: C-O-C Discrepancies: Method: Analysis: 4th Quarter Semiannual Groundwater 1011246 11112/2010 11/9 & 1111012010 Intact None SW-8468260CIS030C Tetrahydrofuran General Set Comments: Tetrahydrofuran was not observed above reporting limits. Holding Time and Preservation Requirements: All samples were received in appropriate containers and properly preserved. The analysis and preparation of all samples were performed within the method holding times following the methods stated on the analytical reports. Analytical QC Requirements: All instrument calibration and calibration check requirements were met. All internal standard recoveries met method criterion. Batch QC Requirements: MB, LCS, MS, MSD, RPD, and Surrogates: Method Blanks (MBs): No target analytes were detected above reporting limits, indicating that the procedure was free from contamination. Laboratory Control Sample (LCSs): All LCS recoveries were within control limits, indicating that the preparation and analysis were in control. Matrix Spike 1 Matrix Spike Duplicate (MS/MSD): All percent recoveries and RPDs (Relative Percent Differences) were inside established limits, indicating no apparent matrix interferences. Surrogates: All surrogate recoveries were within established limits. Corrective Action: None required. Report Date: 11/19/2010 Page 3 of 15 All analyses applicable to the CWA, SDWA, and RCRA are perfonned in accordance to NELAC protocols. Pertinent sampling informlltion is located on the allached COCo This report is provided for the exclusive use oflhe addressee. Privileges of subsequent use oflhe name oflhis company or any member of its staff, or reproduction of this report in conneclion with the advertisement, promotion or sale orany product or process, OT in connection wilh the re-publication a(lhis report for any purpose other than for the addressee will be granted only on contacl. This company accepts no responsibility except for the due perfOimance ofinspeclion and/or analysis in good faith and according to the rules of the trade and of science. A Client: Denison Mines Lab Set ID: 1011246 Project: 4th Quarter-Semiannual Groundwater Sample ID Analyte LCS VOC 111710A Tetrahydrofuran LCS VOC 111710A Surr: 1,2-Dichloroethane-d4 LCS VOC 111710A Surr: 4-Bromofluorobenzene LCS VOC 111710A Surr: Dibromofluoromethane LCS VOC 111710A Surr: Toluene-d8 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Units Jlg/L %REC %REC %REC %REC Salt Lake City, UT 84115 (801) 26341686. Toll Free (888) 263·8686, Fax (801) 263·8687 e-mail: awal@awal·labs.com,web: www.awal-Iabs.com QC SUMMARY REPORT Dept: MSVOA QC Type: LCS Amount Original Method Result Spiked Amount %REC SW8260C 23,} 20.00 0 116 SW8260C 52.0 50.00 104 SW8260C 49.4 50.00 98.7 SW8260C 50.5 50.00 101 SW8260C 48.9 50.00 97.9 Limits 43-146 69-132 85-118 80-120 81-120 Kyle F. Gross Laboratory Director Jose Rocha QA Officer %RPD RPD Limit Qualifiers Analysis Date 11117/2010 11/17/2010 1111712010 11/17/2010 11117/2010 Report Date: 11/1912010 Page: 12 of15 All analyses applicable to the CW A, SOW A, and RCRA arc performed in accordance to NELAe protocols. Pertinent sampling information is located otL the aC1achcd COCo This report is provided for the exclusive use of the addressee. Privileges of subsequent usc of the Dame of this company or any member" of its staff, or reproduction of this report in connection with the advertisement.. promotion or sale of any product or process, or in connection with the fe-publication oftb:is report for any purpose other than for the addressee will be granted only on contact. This company accepts no responsibility except for the due performance ofinsp~tion and/or analysis in good faith and according to the rules of the trw and of science. A Client: Denison Mines Lab Set ID: 1011246 Project: 4th Quarter-Semiannual Groundwater Sample ID Analyte MB VOC 111710A Tetrahydrofuran MB VOC 111710A SUIT: 1,2-Dichloroethane-d4 MB VOC 111710A SUIT: 4-Bromofluorobenzene MB VOC 111710A SUIT: Dibromofluoromethane MB VOC 111710A SUIT: Toluene-d8 AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Units J.lg/L %REC %REC %REC %REC Salt Lake City, UT 84115 (801) 263-8686, Toll Fre. (888) 263-8686, Fax (801) 263-8687 e-mail: awal@awal-labs.com, web: www.awal-Iabs.com C SUMMARY REPORT Dept: MSVOA QC Type: MBLK Amount Original Method Result Spiked Amount %REC SW8260C < 1.00 SW8260C 51.7 50.00 103 SW8260C 52.4 50.00 105 SW8260C 49.7 50.00 99.4 SW8260C 50.3 50.00 101 Limits 69-132 85-118 80-120 81-120 Kyle F. Gross Laboratory Director Jose Rocha QA Officer Analysis % RPD RPD Limit Qualifiers Date 1111712010 11/17/2010 11117/2010 1111712010 11117/2010 Report Date: 11/1912010 Page 13 of15 All analyses applicable to the CW A, SOW A, and RCRA arc performed in accordance to NELAe protocols. Pertinent sampling information is located on the attached COCo This report is provided for the exclusive usc of the addressee. Privileges of subsequent usc of the Dame of this company or any member of its staff, or reproduction armis report in connection with the advertisement, promotion or sale afaoy product or process, or in connection with thc Tc-publlcation of this report for any purpose other than [or the addressee will be granted ooly on contacL This company accepts DO responsibility except [ot" the due performance ofinspcction and/or analysis in good faith and according to the rules of the Ilade aad of science, A Client: Denison Mines Lab Set ID: 1011246 Project: 4th Quarter-Semiannual Groundwater Sample ID Analyte 1011246-001AMS Tetrahydrofuran 1011246-001AMS Surr: 1,2-Dichloroethane-d4 1011246-001AMS Surr: 4-Bromotluorobenzene 1011246-001AMS Surr: Dibromotluoromethane 1011246-001AMS Surr: Toluene-d8 AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Units IlgIL %REC %REC %REC %REC Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 263-8686, Fax (801) 263-8687 e-mail: awal@awal-Iabs~com, web: www.awal-labs.com QC SUMMARY REPORT Dept: MSVOA QCType: MS Amount Original Method Result Spiked Amount %REC SW8260C 23.7 20.00 0 119 SW8260C 54.1 50.00 108 SW8260C 49.4 50.00 98.9 SW8260C 50.4 50.00 101 SW8260C 48.4 50.00 96.8 Limits 43-146 77-144 80-123 80-124 80-125 Kyle F. Gross Laboratory Director Jose Rocha QA Officer %RPD RPD Limit Qualifiers Analysis Date 11117/2010 11117/2010 11117/2010 11117/2010 11117/2010 Report Date: 11/1912010 Page 14 of1S All analyses applicable to the CWA, SDWA. and RCRA arc performed in accordance to NELAC protocols, Pertinent sampling information is located on the attached COCo This report is provided for the exclusive use of the addressee. Privileges Qfsubscqucnt use of the name of this company or any member o[1ts staIT, or reproduction of this report in connection with the advertisement, promotion or sale cfany product or process, or in connection with the re-publication of this report for any purpose othcr than for the addressee will be granted only on contact. This company accepts no responsibility except for the due performance of inspection and/or analysis in good faith and according to the rules of the trade and of science. A Client: Denison Mines Lab Set ID: 1011246 Project: 4th Quarter-Semiannual Groundwater SampleID Analyte 1011246-001AMSD Tetrahydrofuran 1011246-001AMSD Surr: 1,2-Dichloroethane-d4 1011246-001AMSD Surr: 4-Bromofluorobenzene 1011246-001AMSD Surr: Dibromofluoromethane 1011246-001AMSD Surr: Toluene-dS AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Units j!g/L %REC %REC %REC %REC Salt Lake City, UT 84115 (801) 263-8686. Toll Free (888) 263-8686, Fax (801) 263-8687 e-mail: awal@awal-Iabs.com, web: www.awaJ-labs.com QC SUMMARY REPORT Dept: MSVOA QC Type: MSD Amount Original Method Result Spiked Amount %REC SWS260C 22.1 20.00 0 110 SWS260C 54.0 50.00 lOS SWS260C 49.2 50.00 9S.5 SWS260C 50.4 50.00 101 SWS260C 47.S 50.00 95.6 Limits 43-146 77-144 SO-123 SO-124 SO-125 Kyle F. Gross Laboratory Director Jose Rocha QA Officer %RPD RPD Limit Qualifiers 7.25 25 Analysis Date 11117/2010 11117/2010 11117/2010 11117/2010 11117/2010 Report Date: 11/1912010 Page 15 ofl5 All analyses applicable to the CWA, SDWA, and RCRA arc performed in accordance to NELAC protocols. Pertinent sampling infonnation is located on the attached COCo This report is provided [arthe exclusive use of the addressee_ Privileges of subsequent use oftbc name of this company or any member of its staff, or reproduction oftbis report in connection with the advertisement, promotion or sale orany product or process, or in connection with the re-publication ofthis report fOT any purpose other than for the addressee will be granted only on contact. This company accepts no responsibility except for the due pcrfonnance of inspection and/or analysis in good faith and accordlng to the rules of the bade and ofsciencc. American West Analytical Laboratories WORK ORDER Summary Work Order: 1011246 Client: Denison Mines Page I of 1 ClientID: DENI00 Contact: Jo Ann Tischler 11/12/2010 Project: 4th Quarter-Semiannual Groundwater QC Level: LEVEL III WO Type: Project Comments: No Hard Copies (UL). QC 3 &' Summary. EDD-CSV. Report THF to 1 Ilg~9:b -k,l SamplelD Client Sample ID Collected Date Received Date Date Due Matrix Test Code Sel Storage 1011246-QOIA MW-14 11110/2010 3:15:00 PM 11112/201010:00:00 AM 1113012010 Aqueous 8260-W ~ YOCFridge 3 1011246-002A MW-25 1 lf1 0120 1 0 12:20:00 PM 11130/2010 8260-W ~ VOCFridge J 011246-003A MW-29 J 1I9{2010 3:05:00 PM 11I30f2010 8260-W ~ VOCFridge 101 1246-004A MW-30 1119/2010 12:20:00 PM 11!3012010 8260-W ~ YOCFridge lO1l246-005J\. MW-31 1119/20102:30:00 PM 1lI3012010 8260-W ~ YOCFridge 1011246-006A MW-32 11110/2010 1:20:00 PM lI/3 0120 1 0 8260-W ~I VOCFridge 1011246-007 A MW-65 1113012010 8260-W ~ VOCFridge lO1l246-00SA Trip Blank 1119{2010 11130/2010 8260-W ~ VOCFridge OENlson~J. Sheet 1 ofl MINES CHAIN OF CUSTODY Samples Shipped to: American West Analytical Lab 463 West 3600 South Salt Lake City. Ut 84115 Contact: Ryan Palmer or David Turk Ph: 435 678 2221 rpalmer@denisonmines.com dturk@denisonmines.com Chain of Custody/Sampling Analysis Request p , t rOlee s amplers N arne s amplers S' t Igna ure 4th Quarter-Semiannual :J~~~ Groundwater Tanner Holliday Date Time SamplelD Collected Collected LaboratolY Analysis Requested MW 14 111'10/2010 1515 THF MW25 11/10/2010 1220 THF MW29 11/912010 1505 THF MW30 11/9/2010 1220 THF MW 31 11/9/2010 1430 THF MW32 111'10/2010 1320 THF MW65 11/'10/2010 1320 THF "lri1> ~lan~ \\(q/~ID 11\ Please notify Ryan Palmer of ReciePt tempature on these samples Immj;ldiately! Thank y_ou, ,.,...- Relinquished By:(Signature) DatelTime 7S19naturA) DatelTime :J~JI~ 11/11/2010 1130 Rellnqulshed By:(Signature) 7 ~ZffiJ ~Zime d ',I'!...;rl/ It ~\O '4 J.S- UPS Internet Shipping: Shipment Label UPS Internet Shipping: View/Print Label I. Print the label(s): Select the Print button on the print dialog box that appears. Note: If your browser does not support this function select Print from the File menu to print the label. ~. Fold the printed label at ·the solid line below. Place the label in a UPS Shipping Pouch. If you do not have a pouch, affix the folded label using clear plastic shipping tape over the entire label. 3. GETTING YOUR SHIPMENT TO UPS Customers without a Dally Pickup Schedule a same day or future day Pickup to have a UPS driver pickup all of your Internet Shipping packages. Hand the package to any UPS driver in your area. Take your package to any location of The UPS Store®, UPS Drop Box, UPS Customer Center, UPS Alliances (Office Depot® or Staples®) or Authorized Shipping Outlet near you. Items sent via UPS Return ServicesSM (including via Ground) are also accepted at Drop Boxes. To find the location nearest you, please visit the 'Find Locations' Quick link at ups.com. Customers with a Daily Pickup Your driver will pickup your shipment(s) as usual. FOLD HERE Page 1 of 1 https:/ Iwww.ups.comluis/create?ActionOriginPair=print_Receipt&POPUP_LEVEL=1...11111120 1 0 - --------------._----- Lab Set ID: ( \j f I '2 L{ & Samples Were: CDC Tape Was: Container Type: No. Rec_ ~ Shipped By: lAfS Present on Outer Package ~WAL Supplied Plastic o Hand Delivered Xl'Yes DNa DN/A D A ~upplied Clear Glass o Ambient Untlroken on Outer package D A WAL Su~d Amber Glass . 'f/. Chilled NYes DNo 0 N/A _ o A WAL SllPPlied=:TOX Vials Temperature 3_::l°C Present on Sample o Amber 0 Clear D Hea seD No Headspace Rec. Broken!Leaking DYes !'.(No DN/A . DYes ONo ~N/A o Non A W AL Supplied Contain~ Notes: Unbrol<en on Sample Notes: ~ DYes DNa r/..N/A Pro~erly_Preserved Ff!Yes DNa DN/A Notes: Notes: \ Rec_ Within Hold ItYes DNa " Discrepancies Between Labels and COC Notes: [ Notes: rBett.le..I,'LDe Preservative All pHs OK Ammonia . ...ll. .,..,..~(). COD Cyanide Metals . N02 &N03 Nutrients O&G Phenols Sulfide TKN TOC TP04 TPH Procedure: 1) 2) 3) 4) 5) . 6) 7) pH <2 H2SO4 ---PH>12NaOH ----.:.. ' .. pH<2HNO; ~ -I pH <2 H2SO4 -... t--- pH <2 H,S04 r---.. pH<2HCL -........... - pH <2 HZS04 --...... pH> 9NaOH, ZnAC --....... pH<iH2S04 ............. p_H<2 H]P04 .. . .......... pH <2 H2S04 ........... pH <2 HCL .~ Pour a small amount of sample in the sample lid Pour sample from Ud gently over wide r'l-nge pH paper Do Not dip the pH papa r in the sample bottle or lid . . If saniple is not preserved properly list its extension and re~iving pH in the appropriate column above Flag COG and notify client for further instructions . Place client conversation on COC . Samples may be adjusted at client request· DYes"" »No ) . .. i """ ........, """ I A Jo Ann Tischler Denison Mines 1050 17th Street, # 950 AMERICAN Denver, CO 80265 WEST TEL: (303) 389-4132 ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, VT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer RE: 4th Quarter-Semiannual Groundwater Dear Jo Ann Tischler: Lab Set ID: 1011302 American West Analytical Laboratories received 6 sample(s) on 11116/2010 for the analyses presented in the following report. All analyses were performed in accordance to The NELAC Institute protocols unless noted otherwise. American West Analytical Laboratories is certified by The NELAC Institute in Utah and Texas; and is state certified in Colorado and Idaho. Certification document is available upon request. If you have any questions or concerns regarding this report please feel free to call. The abbreviation "Surr" found in organic reports indicates a surrogate compound that is intentionally added by the laboratory to determine sample injection, extraction, and/or purging efficiency. The "Reporting Limit" found on the report is equivalent to the practical quantitaion limit (PQL). This is the minimum concentration that can be reported by the method referenced and the sample matrix. The reporting limit must not be confused with any regulatory limit. Analytical results are reported to three significant figures for quality control and calculation purposes. Thank You, Approved by: Digitally signed by Jose G. J 0 5 e G ~~~~~=Jose G. Rocha, • o=American West Analylical Laboratortes, ou=Quality Assurance Officer, Roc h a ~~~~=Jose@aWal-labs.com, Date: 2010.11.2211:45:37 -07'00' Laboratory Director or designee Report Date: 11/22/2010 Page I ofl3 All analyses applicable to the CWA, SDWA. and RCRA are pcrromcd in accordance to NELAC protocols. Pertinent sampling information is Located on the att.ached CDC. This report is provided for the exclusive use ofthe addressee. Privileges or subsequent use of the name of this company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection with the re-publication of this report for any purpose other than for the addressee will be granted only on contact This company accepts no responsibiliLy except for the due perfonnance of inspection and/or analysis in good faith and according to the rules of the trade and of science. A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Client: Project: Lab SetID: Date Received: Lab Sample ID 1011302-001A 1011302-002A 1011302-003A 1011302-004 A 1011302-005A 1011302-006A SAMPLE SUMMARY Denison Mines Contact: Jo Ann Tischler 4th Quarter-Semiannual Groundwater 1011302 11/16/2010 0945h Client Sample ID Date Collected Matrix Analysis MW-5 1111112010 l505h Aqueous VOA by GC/MS Method 8260CI5030C MW-ll 11/11/2010 1215h Aqueous VOAby GC/MS Method 8260C/5030C MW-15 11111/2010 1130h Aqueous VOAby GC/MS Method 8260CI5030C MW-27 11112/2010 1220h Aqueous VOAbyGCIMS Method 8260CIS030C MW-28 11/12/2010 1135h Aqueous VOAby GCIMS Method 8260CIS030C Trip Blank 1111112010 Aqueous VOAby GCIMS Method 8260CI5030C Report Date: 11/22/2010 Pagc20ft3 All analyses applicable La the CW A, SDWA, and RCRA ilre performed in accordance to NELAC proLocols. Pertinent sampling information is located on the altBchcd COCo This report is provided for the exclusive use of the addressee. Privileges or subsequent use oflhe name of this company or any member of its starf, OT reproduction of this report in connection with the advertisement, promotion or sale of !:lny product or process, or in connection with the re-publicalion of this report for any purpose other than for lhe addressee will be granted only on contacl. This company accepts no responsibility except for the due perfonnance of inspection and/or analysis in good faith and according to the rules of the trade and of science. A AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Volatile Case Narrative Client: Contact: Denison Mines Jo Ann Tischler Project: Lab SetID: Sample Receipt Information: Date of Receipt: Date(s) of Collection: Sample Condition: C-O-C Discrepancies: Method: Analysis: 4th Quarter-Semiannual Groundwater 1011302 11116/2010 11111 & 11/12/2010 Intact None SW-8468260C/5030C Tetrahydrofuran General Set Comments: Tetrahydrofuran was observed above its reporting limits on sample 10 11302-00 1 A. Holding Time and Preservation Requirements: All samples were received in appropriate containers and properly preserved. The analysis and preparation of all samples were performed within the method holding times following the methods stated on the analytical reports. Analytical QC Requirements: All instrument calibration and calibration check requirements were met. All internal standard recoveries met method criterion. Batch QC Requirements: MB, LCS, MS, MSD, RPD, and Surrogates: Method Blanks (MBs): No target analytes were detected above reporting limits, indicating that the procedure was free from contamination. Laboratory Control Sample (LCSs): All LCS recoveries were within control limits, indicating that the preparation and analysis were in control. Matrix Spike 1 Matrix Spike Duplicate (MS/MSD): All percent recoveries and RPDs (Relative Percent Differences) were inside established limits, indicating no apparent matrix interferences. Surrogates: All surrogate recoveries were within established limits. Corrective Action: None required. Report Date: 11122/2010 Page 3 of 13 All analyses applicable to the CWA, SDWA, and RCRA are performed in accordance to NELAC prolocols. Pertinent sampling information is located on the allBched CDC. This report is provided fOT the exclusive use of the addressee. Privileges of subsequent use of the name of this company or any member of ils starr, or reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection wilh the re-pubLication of this report for any purpose olher than for Lhe addressee will be granted onLy on contRct This company accepts no responsibility except for the due perfonnance of inspection andlor analysis in good faith and according to the ruLes of the trade and of science. A Client: Denison Mines Lab SetID: 1011302 Project: 4th Quarter-Semiannual Groundwater Sample ID Analyte LCS VOC 111710A Tetrahydrofuran LCS VOC 111710A Surr: 1,2-Dichloroethane-d4 LCS VOC 111710A Surr: 4-Bromofluorobenzene LCS VOC 111710A Surr: Dibromofluoromethane LCS VOC 111710A Surr: Toluene-d8 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Units 1J.g/L %REC %REC %REC %REC Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 263-8686. Fax (801) 263-8687 e-mail: awa1@awal-1abs.com,web: www.awal-labs.com QC SUMMARY REPORT Dept: MSVOA QC Type: LCS Amount Original Method Result Spiked Amount %REC SW8260C 23.1 20.00 0 116 SW8260C 52.0 50.00 104 SW8260C 49.4 50.00 98.7 SW8260C 50.5 50.00 101 SW8260C 48.9 50.00 97.9 Limits 43-146 69-132 85-118 80-120 81-120 Kyle F. Gross Laboratory Director Jose Rocha QA Officer %RPD RPD Limit Qualifiers Analysis Date 11117/2010 11117/2010 11117/2010 11/17/2010 11117/2010 Report Date: 11122/2010 Page 10 of 13 All analyses applicable to the CW A, SDWA, and RCRA arc performed in accordance to NELAC protocols. Pertinent sampling information is located on the attached COCo This report is provided for the exclusive usc of the addressee Privileges ofsubscqucnt usc ofthc: name of this company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection with the re-publication of this report fOT any purpose other than for the addressee will be granted only on contact. This company accepts no responsibility except [or the due performance of in spec lion and/or analysis in good faith and according to thc rules of the trade and ofscicncc. A Client: Denison Mines Lab Set ID: 1011302 Project: 4th Quarter-Semiannual Groundwater SampleID Analyte MB VOC 111710A Tetrahydrofuran MB VOC 111710A SUIT: 1,2-Dichloroethane-d4 MB VOC 111710A SUIT: 4-Bromofluorobenzene MB VOC 111710A SUIT: Dibromofluoromethane MB VOC 111710A SUIT: Toluene-d8 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Units I!glL %REC %REC %REC %REC Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 263-8686, Fax (801) 263-8687 e-mail: awal@awal-labs.com, web: www.awal-Iabs.com QC SUMMARY REPORT Dept: MSVOA QC Type: MBLK Amount Original Method Result Spiked Amount %REC SW8260C < 1.00 SW8260C 51-7 50.00 103 SW8260C 52.4 50.00 105 SW8260C 49.7 50.00 99.4 SW8260C 50.3 50.00 101 Limits 69-132 85-118 80-120 81-120 Kyle F. Gross Laboratory Director Jose Rocha QA Officer Analysis % RPD RPD Limit Qualifiers Date 11/17/2010 11117/2010 11117/2010 11117/2010 11117/2010 Report Date: 11122/2010 Page 11 of13 All analyses applicable to the CWA, SDWA, and RCRA arc perfonned in accordance to NELAC protocols~ Pertinent sampling information is located on the attached COCo This report is provided forthc exclusive usc of the addressee Privileges ofsubscqUCDt usc of the Dame ofthls company or any member of its staff. or reproduction of this report in connection with the advertisement, promotion or sale ofaDY product or process, or in connection with the re-publieation of this report for any purpose other than for the addressee win be granted only on contact, This company accepts no responsibility except for the due performance of inspection and/or analysis in good faith and according to the rules of the trade and ofscicnce A Client: Denison Mines Lab Set ID: 1011302 Project: 4th Quarter-Semiannual Groundwater Sample ID Analyte 1011246-001AMS Tetrahydrofuran 1011246-001AMS Surr: 1,2-Dichloroethane-d4 1011246-001AMS Surr: 4-Bromofluorobenzene 1011246-001AMS Surr: Dibromofluoromethane 1011246-001AMS Surr: Toluene-dS AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Units 1J.g/L %REC %REC %REC %REC Salt Lake City, UT 84115 (801) 263-8686, Toll fr •• (888) 263-8686, Fax (801) 263-8687 e-mail: awal@awal~labs.com. web: www.awal-labs.com QC SUMMARY REPORT Dept: MSVOA QCType: MS Amount Original Method Result Spiked Amount %REC SWS260C 23.7 20.00 0 119 SWS260C 54.1 50.00 lOS SWS260C 49.4 50.00 9S.9 SWS260C 50.4 50.00 101 SWS260C 4S.4 50.00 96.S Limits 43-146 77-144 SO-123 SO-124 SO-125 Kyle F. Gross Laboratory Director Jose Rocha QA Officer %RPD RPD Limit Qualifiers Analysis Date 11/1712010 11117/2010 11/17/2010 11/17/2010 11117/2010 Report Date: 11 1221201 0 Page 12 of 13 All analyses applicable to the: CWA. SDWA. and RCRA arc perfonned in accordance to NELAC protocols. PcniDCDt sampling information is loc:au::d on the anachcd COCo This report is provided fortbc exclusive usc: of the addressee. Privileges of subsequent use of the name ofthi! company or any member orits staff, orrcproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection with the Te-publication of this report for aDy purpose other than for the addressee will be granted only on cOntact This company accepts no responsibility except for the due pcrfonnancc of inspection and/or analysis in good faith and according to the rules of the trade and of science. A Client: Denison Mines Lab Set ID: 1011302 Project: 4th Quarter-Semiannual Groundwater Sample ID Analyte 1011246-001AMSD Tetrahydrofuran 1011246-001AMSD SUIT: 1,2-Dichloroethane-d4 1011246-001AMSD SUIT: 4-Bromofluorobenzene 1011246-001AMSD SUIT: Dibromofluoromethane 1011246-001AMSD SUIT: Toluene-d8 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Units Ilg/L %REC %REC %REC %REC Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 263-8686, Fax (801) 263-8687 e-mail: awa1@awal-1abs.com.web:www.awal-Iabs.com QC SUMMARY REPORT Dept: MSVOA QCType: MSD Amount Original Method Result Spiked Amount %REC SW8260C 22.1 20.00 0 110 SW8260C 54.0 50.00 108 SW8260C 49.2 50_00 98.5 SW8260C 50.4 50.00 101 SW8260C 47_8 50.00 95.6 Limits 43-146 77-144 80-123 80-124 80-125 Kyle F. Gross Laboratory Director Jose Rocha QA Officer Analysis %RPD RPD Limit Qualifiers Date 7.25 25 11/17/2010 11/17/2010 11/17/2010 11117/2010 1111712010 Report Date: 11/22/2010 Page 13 of!3 All analyses applicable to the CWA, SDWA, and RCRA are performed in accordance to NELAC !'Toweols, Pertinent sampling infonnatioD is located on the attached COC This; report is provided for the exclusivc usc of the addressee. Privileges ofsubscqucnt usc of the name of this company or any member orits staff, orrcproduction ofth;s report in connection with the advertisement, promotion or sale of any product or process, or in connection with the re-publication of this rcpon for any purpose other than for the addressee: will be granted only on contaCt. This company accepts no responsibility except for the due performance ofinspcction andlor analysis in good faith and according to the rules of the trade and ofscic:nce. -------------,-_ ... --- American West Analytical Laboratories WORK ORDER Summary Client: Denison Mines Client ID: DEN 1 00 Contact: Jo AIm Tischler Project: Semi Annual Ground Water QC Level: LEVEL III Comments: No Hard Copies (UL). QC 3 & Summary. EDD-CSV. Report TIIF to 1 p.gIL.; SampleID Client Sample ID Collected Date Received Date Date Due 1011302-Q01A MW-5 11/11/2010 3:05:00 PM 11116120109:45:00 AM 11130/2010 1011302-002A MW-ll 1111112010 12:15:00 PM 11/30/2010 1011302-003A MW-IS 111111201011:30:00 AM 11130/2010 101I302-004A MW-27 11112/2010 12:20:00 PM 1113012010 1011302-005A MW-28 11112/2010 11:35:00 AM 11130/2010 1011302-006A Trip Blank 1111112010 1II30/2010 Matrix Aqueous Worl{Order: 1011302 WOType: Test Code 8260-W 8260-W 8260-W 8260-W 8260-W 8260-W Page 1 of 1 11/16/2010 Project Set Storage ~ VOCFridge ~ VOCFridge ~ VOCFridge ~ VOCFridge ~ VOCFridge ~ VOCFridge l:l~ 3 ~ -10 \\2'6'~~1~ '0 \\ 5'J2.. Sheet 1 of 1 CHAIN OF CUSTODY Samples Shipped to: American West Analytical Lab 463 West 3600 South Contact: Ryan Palmer or David Turk Ph: 4356782221 Salt Lake City, Ut 84115 rpalmer@denisonmines.com dturk@denlsonmines.com Chain of Custody/Sampling Analysis Request Project Samplers Name Samplers Signature 4th Quarter-Semiannual Groundwater Sample 10 MW 5 MW 11 MW 15 MW27 MW 28 Trip Blank Date Collected 11/11/2010 11/11/2010 11/"11/2010 11/12/2010 11/12/2010 11/11/2010 Tanner Holliday Time Collected Laboratory Analysis Requested 1505 THF 1215 THF 1130 THF 1220 THF 1135 THF THF Please notif~ Ryan Palmer of Reciept tempature on these samples Immediately! Thank you . I Relinquished By:(Signature) 0~~)M Relinquished By:(Signatu e) DatelTime Received By:(Signature) 11/15/2010 1130 DatelTime Received 8y:(Signature) / DatefTime I Lab Set ID: \ f) \ \ :::z.l) "2--... Samples Were: COC Tape Was: Container Type: ~Rec. o Shipped By: Present on ~er Package o A WAL Supplied Plastic ./ rn-Rand Delivered DYes 0 ON/A o A WAL Supplied Clear Glass ,,/' o Ambient ' Unbroken on Outer package o AWAL Supplied Amber Glass ,,/' r;;rChill ed DYes DNo B1TIA, Temperature 2.3 °C presen~ample o A WAL Supplied VO=; Vials o Amber 0 Clear 0 He ace 0 No Headspace Rec. BrokenILeakiug DYes UYNo ON/A . DYes 0 ON/A o Non A W AL SuPR!.~ Container Notes: Unbrol,en on sa~ V o Yes DNa fA Properly Preserved p-1es ONo ON/A Notes: Notes: I Rec, Within Hold O'Y'es DNa Discrepancies Between Labels and COC Notes: Notes: " .~~. Bottle Type , ' Preservative ,All pHs OK / Ammonia , pH <2 H2SO4 /' COD pH <2 H2SO4 ,/' , . Cyanide PH>12NaOH V : Metals pH <2 HN03 /. N02 &N03 pH <2 H2S0~ /1-"" Nutrients pH <2 H2SO4 /. O&G pH<2HCL ./' Phenols pH <2 H2SO4 ' ,/' Sulfide pH> 9NaOH, ZnAC ,/' TKN pH<2~S04 ,/' TOC pH <2 H3P04 /' ' , TP04 pH <2 H2SO4 V TPH pH <2 HCL ./ ./ " . , . / . / /' Procedure: Pour a small amount of sample in the sample lid Pour sample from Lid gently over wide rCjnge pH paper Do Not dip the pH paper in the sample bottle or lid . . 1) 2) 3) 4) 5) If sarnple is not preserved. properly list its extension and receiving pH in the appropriate column above ,6) 7) Flag cac and notify client for further instructions ' Place client conversation on cac . Samples may be adjusted at client request " DYes . ' ' . ~ ~o I A Jo Ann Tischler Denison Mines 1050 17th Street, # 950 AMERICAN Denver, CO 80265 WEST TEL: (303) 389-4132 ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awaL-Iabs.com Kyle F. Gross Laboratory Director RE: 4th Quarter-Semiannual Groundwater Dear Jo Ann Tischler: Lab Set ID: 1011399 American West Analytical Laboratories received 7 sample(s) on 11/1912010 for the analyses presented in the following report. All analyses were performed in accordance to The NELAC Institute protocols unless noted otherwise. American West Analytical Laboratories is certified by The NELAC Institute in Utah and Texas; and is state certified in Colorado and Idaho. Certification document is available upon request. If you have any questions or concerns regarding this report please feel free to call. The abbreviation "Surr" found in organic reports indicates a surrogate compound that is intentionally added by the laboratory to determine sample injection, extraction, and/or purging efficiency. The "Reporting Limit" found on the report is equivalent to the practical quantitaion limit (PQL). This is the minimum concentration that can be reported by the method referenced and the sample matrix. The reporting limit must not be confused with any regulatory limit. Analytical results are reported to three significant figures for quality control and calculation purposes. Jose Rocha Thank You, QA Officer Ky I e F. Digilally signed by Kyle F. Gross DN: cn=Kyle F. Gross, o=AWAL, ou=AWAL, email=kyle@awal· G labs com, c=US ross Dale:2010.11.2411:53:11·07'OO' Approved by: L...-__________ _ Laboratory Director or designee Report Date: 11123/2010 Page 1 of25 All analyses a.pplicable to the CWA, SDWA, and RCRA are performed in accordance Lo NELAC protocols. Pertinent sampling information is located on the altached COCo This report is provided for the exclusive use of the addressee. Privileges of subsequenl use of the name of this company or any member of its sLaff, or reproduction of this report in conneclion with the advertisement, promotion or sale of any product or process, or in connection with the re-publication of this report for any purpose other than for the addressee will be granted only on contacL. This company accepts no responsibility except for the due perfonnance of inspection and/or analysis in good faith and according to the rules orlhe trade and of science. A SAMPLE SUMMARY AMERICAN Client: Denison Mines Contact: Jo Ann Tischler WEST Project: 4th Quarter-Semiannual Groundwater Lab Set ID: lO11399 ANALYTICAL Date Received: 11/19/2010 1030h LAB ORA TORIES Lab Sample ID Client Sample ID Date Collected Matrix Analysis 1011399-001A MW-4 1111512010 1350h Aqueous VOAbyGCIMS 463 West 3600 South Method 8260CI5030C Salt Lake City, UT 101 1399-002A MW-17 11117/2010 1255h Aqueous VOAbyGCIMS 84115 Method 826OC/5030C 1011399-003A MW-22 11116/2010 1235h Aqueous VOAbyGCIMS Method 8260CI5030C 1 o 11399-004A MW-24 11/17/2010 0845h Aqueous VOAbyGCIMS (801) 263-8686 Method 8260CI5030C Toll Free (888) 263-8686 1011399-005A MW-26 11/15/2010 1302h Aqueous VOAbyGCIMS Fax (801)263-8687 Method 8260CI5030C email: awal@awal-labs.com 1011399-006A Trip Blank 11115/2010 Aqueous VOAby GCIMS Method 8260C/5030C Kyle F. Gross 1011399-007A MW-2 11/1712010 1000h Aqueous VOAbyGCIMS Method 8260C/5030C Laboratory Director Jose Rocha QA Officer Report Date: 1112312010 Page 2 of25 All analyses applicable to the CWA. SDWA. and ReRA are performed in accordance to NELAC protocols. Pertinent sampling informaUon is located on the attached COCo This report is provided for the exclu.ive use o[the addressee. Privileges of subsequent use of the name of this company or any member of its staff, or reproduction of this report in connection wiLh Lhe advertisement, promotion or sale of any producL or process, or in conneclion with the re-publication of this report for any purpose other tban for the addressee will be granted only on contact. This company accepts no responsibility except for the due performance of in!pection and/or analysis in good faith and according 10 the rules ofthc trade and of science. A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Volatile Case Narrative Client: Contact: Denison Mines Jo Ann Tischler Project: Lab Set ID: Sample Receipt Information: Date of Receipt: Date(s) of Collection: Sample Condition: C-O-C Discrepancies: Method: Analysis: 4th Quarter-Semiannual Groundwater 1011399 11/19/2010 11/15-11117/2010 Intact None SW-8468260C/5030C Tetrahydrofuran General Set Comments: Tetrahydrofuran was not observed above reporting limits. Holding Time and Preservation Requirements: All samples were received in appropriate containers and properly preserved. The analysis and preparation of all samples were performed within the method holding times following the methods stated on the analytical reports. Analytical QC Requirements: All instrument calibration and calibration check requirements were met. All internal standard recoveries met method criterion. Batch QC Requirements: MB, LCS, MS, MSD, RPD, and Surrogates: Method Blanks (MBs): No target analytes were detected above reporting limits, indicating that the procedure was free from contamination. Laboratory Control Sample (LCSs): All LCS recoveries were within control limits, indicating that the preparation and analysis were in control. Matrix Spike 1 Matrix Spike Duplicate (MS/MSD): All percent recoveries and RPDs (Relative Percent Differences) were inside established limits, indicating no apparent matrix interferences. Surrogates: All surrogate recoveries were within established limits. Corrective Action: None required. Report Date: ]]/23/2010 Page 3 of25 All analys~s applicable 10 the CW AI SDWA, and RCRA are performed in accordance to NELAC pro loco Is. Pertinent sampling infonnalion is located on the aLLachcd COCo This report is provided for the exclusive use of the addressee. Privileges of subsequent usc of the name of this company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection with the re·publicstion of this report for any purpose other than for the addressee will be gmnted only on contact This company accepts no responsibility except for the due perfoJ1l1snce of inspection and/or analysis in good faith and according to the rules oflhe Lrade and of science. A Client: Denison Mines Lab Set ID: 1011399 Project: 4th Quarter-Semiannual Groundwater Sample ID Analyte LCS VOC 112210A Tetrahydrofuran LCS VOC 112210A Surr: 1,2-Dichloroethane-d4 LCS VOC 112210A Surr: 4-Bromofluorobenzene LCS VOC 112210A Surr: Dibromofluoromethane LCS VOC 112210A Surr: Toluene-d8 AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Units ~gIL %REC %REC %REC %REC Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 263-8686, Fax (801) 263-8687 e-mail: awal@awal.1abs.cam, web: www.3wal-labs.com C SUMMARY REPORT Dept: MSVOA QC Type: LCS Amount Original Method Result Spiked Amount %REC SW8260C 19_6 20.00 0 98.1 SW8260C 60.0 50.00 120 SW8260C 48.0 50_00 96.0 SW8260C 52.4 50.00 105 SW8260C 47.0 50.00 94.0 Limits 43-146 69-132 85-118 80-120 81-120 Kyle F. Gross Laboratory Director Jose Rocha QA Officer %RPD RPD Limit Qualifiers Analysis Date 1112212010 11/22/2010 1112212010 11122/2010 11122/2010 Report Date: 1112312010 Page 11 of25 AU analyses applicable to the CW A, SOW A, and RCRA arc pcrfonncd in accordance to NELAC protocols. Pmlinent sampling infonnation is located 00 the anachcd cae This report is provided fOT the exclusive usc of the addressee. Privileges of subsequent usc of the name of this company or any member of its starr, or reproduction of this report in connection with the: advertisement, promotion or sale ohoy product or process, or in connection with tllc rc-publication of this report for 8lly purpose other than for the addressee will be granted only On contact. This company accepts no rcsponsibilily except for the due pcrforTD811cc of inspection andlor anatys;s in good faith and according to the rules of the trade snd ofsciencc. A Client: Denison Mines Lab SetID: 1011399 Project: 4th Quarter-Semiannual Groundwater Sample ID Analyte MB VOC 112210A Tetrahydrofuran MB VOC 112210A Surr: 1,2-Dichloroethane-d4 MB VOC 112210A Surr: 4-Bromofluorobenzene MB VOC 112210A Surr: Dibromofluoromethane MB VOC 112210A Surr: Toluene-d8 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Units J.lg/L %REC %REC %REC %REC Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 263-8686, Fax (801) 263-8687 e-mail: awal@awal.lahs.com, web: www.awal-labs.com QC SUMMARY REPORT Dept: MSVOA QC Type: MBLK Amount Original Method Result Spiked Amount %REC SW8260C < 1.00 SW8260C 59.5 50.00 119 SW8260C 52.2 50.00 104 SW8260C 51.2 50.00 102 SW8260C 47.7 50_00 95.5 Limits 69-132 85-118 80-120 81-120 Kyle F. Gross Laboratory Director Jose Rocha QA Officer Analysis %RPD RPD Limit Qualifiers Date 11122/2010 11122/2010 11122/2010 11/22/2010 1lI22/2010 Report Date: 1112312010 Page 12 of25 All analyses applicable to the CW A. SDWA, and RCRA arc pcrfonned in accordance to NELAC protocols, Pertinent sampling information is located 00 the attached coe, This report is provided for the exclusive use ofthc: addressee.. Privileges ofsubscqucnt usc of the name of this company or any member of its s[aff, or reproduction of this report 10 connection with the: advertisement, promotion or sale of any product or process, or in connection with the rc-publication of this report for any putpose other than forthc addressee will be granted ouly on contact This company accepts no responsibility except for the due pcrformam:e of inspection and/or analysis in good faith and according to the rules of the: trade and of science. A Client: Denison Mines Lab Set ID: 1011399 Project: 4th Quarter-Semiannual Groundwater Sample ID Analyte 1011399-003AMS Tetrahydrofuran 1011399-003AMS Surr: 1,2-Dichloroethane-d4 1011399-003AMS Surr: 4-Bromofluorobenzene 1011399-003AMS Surr: Dibromofluoromethane 1011399-003AMS Surr: Toluene-d8 AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Units 11g/L %REC %REC %REC %REC Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 263-8686, Fax (801) 263-8687 c:-mail: awal@awaJ-labs.com, web: www.awal-Iabs.com QC SUMMARY REPORT Dept: MSVOA QCType: MS Amount Original Method Result Spiked Amount %REC SW8260C 24.6 20.00 0 123 SW8260C 62.0 50.00 124 SW8260C 48.3 50.00 96.6 SW8260C 52.0 50.00 104 SW8260C 46.5 50.00 93.0 Limits 43-146 77-144 80-123 80-124 80-125 Kyle F. Gross Laboratory Director Jose Rocha QA Officer %RPD RPD Limit Qualifiers Analysis Date 11122/2010 1112212010 1112212010 1112212010 11122/2010 Report Date: 11123/2010 Page l3 of25 All analyses applicable to the CW ~ SDW A, and RCRA are performed in accordance to NELAC protocols. Pertinent sampling information is located on the: attached COC, This report is provided for the exclusive usc of the addressee. Privileges of subsequent usc: of the name of this company or any member of its starr, or reproduction afthis report in connection with the advertisement, promotion or sale or any product or process. or in connection with the rc-puhlication of this report for any pUIp0se other than for the addresscc will be granted only On contact. This company accepts no responsibility except for the due performance of inspection andlor analysis in good faith and according to the rules of the trade and ofscicnce. A Client: Denison Mines Lab Set ID: 1011399 Project: 4th Quarter-Semiannual GroWldwater Sample ID Analyte 1011399-003AMSD Tetrahydrofuran 1011399-003AMSD Surr: 1,2-Dichloroethane-d4 1011399-003AMSD SUIT: 4-Bromofluorobenzene 1011399-003AMSD SUIT: Dibromofluoromethane 1011399-003AMSD SUIT: Toluene-d8 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Units 11g!L %REC %REC %REC %REC Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 263-8686, Fax (801) 263-8687 e-mail: awal@awal-labs,com, web: www.3waJ-labs.com QC SUMMARY REPORT Dept: MSVOA QCType: MSD Amount Original Method Result Spiked Amount %REC SW8260C 23.1 20_00 0 116 SW8260C 62.2 50_00 124 SW8260C 48.2 50_00 96.4 SW8260C 52.4 50_00 105 SW8260C 46.4 50.00 92.7 Limits 43-146 77-144 80-123 80-124 80-125 Kyle F _ Gross Laboratory Director Jose Rocha QA Officer %RPD RPD Limit Qualifiers 6.41 25 Analysis Date 1112212010 11122/2010 11122/2010 11/22/2010 11/22/2010 Report Date: 1112312010 Page 14 of25 All analyses applicable to the CW A, SOW A, and RCRA arc performed in accordance to NELAC protocols. Pertinent sampling information is located on the attached COCo This rcpon is provided for the exclusive use of the addressee, Priv:ileges of subsequent usc of the Dame of this company or any member of its staff, or reproduction arlhis report in connection with the advc:rtisemcnt, promotion or sale orany product or process, or in connection with the re-publicatioD of this report for any PUIposc other than for the addressee will be: gnmtcd only on CO'Dtact. This company accepts no responsibility except for the due performance ofinspcction and/or ana\ysis in good faith and according to the: rules of the: trade:: and ofscicncc. Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\DATA\NOV10-C\22NOV10A\ B77L3991.D 22 Nov 2010 9:22 am 101l399-001A SAMP 5.0ML 10F3 6 Sample Multiplier: 1 Quant Time: Nov 22 13:18:08 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_23.M Quant Title VOA Calibration QLast Update Wed Nov 17 09:42:13 2010 Response via Initial Calibration (QT Reviewed) ! undance TIC: BnL3991.0\dala .. ms 8000000 7500000 7000000 6500000 6000000 5500000 5000000 4500000 4000000 3500000 3000000 2500000 2000000 1500000 1000000 ,g .,; <I!. d> "9 Q) <: " <: ~ "I. <: " Q) !'! il !ll !'! ~ l'l il e e .l2 ~ e 0 :6 .l2 ~ {? ~ Cl U E ..l;. to ~ e " rJl '" ~ to " rJl 500000 Ime->"--_-=2"'.0'-"0-'2"".5O=_ AFULLW_23.M Mon Nov 22 13:20:15 2010 J!.OO 9.50 10.00---1 0.50 11.:9.0 11.50 Report Date: 1II2312ti'm1E¥egtf!150f25 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\DATA\NOVIO-C\22NOVIOA\ 878L3992.D 22 Nov 2010 9:41 am 101l399-002A SAMP 5.0ML lOF3 7 Sample Multiplier: 1 Quant Time: Nov 22 13:22:17 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_23.M Quant Title VOA Calibration QLast Update Wed Nov 17 09:42:13 2010 Response via Initial Calibration (QT Reviewed) undance TIC: B78l3992.D\data.ms 800000 750000 .,; 'i' " " Q) ~ 1l E! .9 J:: ~ 0 ~ " " ~ 700000 il E! 650000 (/) .9 J:: g-.Y Cl Q) .... N " " ~ Cl g ~ 600000 'g ~ E E! ill III " I: 1l " (/) 550000 E! 0 If Cl ~ 500000 450000 400000 350000 (/) ell. f Q) ~ J:: ;; ~ E 0 E! il 0 " is '5 N. E 300000 250000 E! ~ ,Q Cl (/) 200000 5 (/) 150000 100000 50000 . Ie 1 ~ 1 1 l t L l I" o me-> 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 6,qO 7.00 7.50 8.00 8.50 9.00 9.50 10.00 10.50 11.00 '1.50 AFULLW_23.M Mon Nov 22 13:22:24 2010 Report Date: 11/23/2f1Jm~gtl16 of25 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitat ion Report C:\msdehem\1\DATA\NOV10-C\22NOV10A\ B79L3993.D 22 Nov 2010 10:00 am 1011399-003A SAMP 5.0ML 10F3 8 Sample Multiplier: 1 Quant Time: Nov 22 13:24:00 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_23.M Quant Title VOA Calibration QLast Update Wed Nov 17 09:42:13 2010 Response via Initial Calibration (QT Reviewed) I ~ TIC: B791.3993.Dldata.ms 700000 ¥t ., c: III ~ e 650000 .Q B ~ ~ 21 ~ 600000 CIJ ~ ~ ~ " ~ .:;. ~ "'. 550000 g 0 'E la E e '" I: " CIJ 500000 450000 400000 350000 300000 250000 200000 150000 100000 50000 2.00 2.50 3.00 3.50 4.00 4.50 AFULLW_23.M Man Nov 22 13:24:17 2010 0.0!LJQ.,5Q.Jj .~,§O Report Date: 1I/2312ijftJ.JE¥agdi17 of2S Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\DATA\NOV10-C\22NOV10A\ B80L3994.D 22 Nov 2010 10:19 am 101l399-004A SAMP 5.0ML 10F3 9 Sample Multiplier: 1 Quant Time: Nov 22 13:25:29 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_23.M Quant Title VOA Calibration QLast Update Wed Nov 17 09:42:13 2010 Response via Initial Calibration (QT Reviewed) ! bundance TIC: BBOL3994.D\dala.ms 750000 700000 ..f 'ij "% " CD 650000 600000 ~ ~ .lIl ~ ~ ~ "l. ~ ~ -II CD 0 ~ ". .lIl ~ ~ ~ .,; E " ~ 550000 CD '" N 5 " ~ (/) 0 ::I II: 500000 0 ~ 450000 400000 350000 300000 (/) ~ .,; ~ " .l!! .&; 15 ~ E ~ 250000 ~ _II ::I 0 'a N. E ~ I: -" ::I i5 (/) 200000 ~ (/) 150000 100000 50000 O~~~~R9~~~~~~TH~~~~no~~~~~~~~~on~~~~~~~~~~~ 6.=;0 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50 10.00 10.50 11.00 11.50 AFULLW_23.M Mon Nov 22 13:26:03 2010 Report Date: 11I2312ijftB"EFag#18of25 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\DATA\NOVIO-C\22NOVIOA\ B81L3995.D 22 Nov 2010 10:38 am 101l399-005A SAMP 5.0ML 10F3 10 Sample Multiplier: 1 Quant Time: Nov 22 13:27:28 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_23.M Quant Title VOA Calibration QLast Update Wed Nov 17 09:42:13 2010 Response via Initial Calibration (QT Reviewed) undance TIC: 881 L3995.D\data.ms 4000000 3800000 3600000 3400000 3200000 3000000 2800000 2600000 2400000 2200000 2000000 1800000 1600000 1400000 1200000 uf ~ " "C 1000000 BOOOOO 600000 '" ~ <Jl .. '" ~ g-" "C Q) ~ " " i'! Z N Z oJ ~ e " " ~ ~ e Q) 0 .9 CI!. ~ f-U 0 .<: Z ~ " .Il Q) ~ '6 '" " CI!. e en '" 0 E ... , .<: " ~ ! " .=! 0 e i~ I: lii " ~ e en <Jl .9-.<: E 5 e ,g "'-400000 0 I: I: " " <Jl en 200000 O~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~rn~~~~~~n me -> 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50 10.00 10.50 11.00 11.50 AFULLW_23.M Mon Nov 22 13:27:57 2010 Report Date: 11/23/2fi'm:JEAlge'i190f25 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\I\DATA\NOVI0-C\22NOVI0A\ B82L3996.D 22 Nov 2010 10:59 am 1011399-006A SAMP 5.0ML 10F3 11 Sample Multiplier: 1 Quant Time: Nov 22 13:28:51 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_23.M Quant Title VOA Calibration QLast Update Wed Nov 17 09:42:13 2010 Response via Initial Calibration (QT Reviewed) --r bund 80 ance TIC: BB2L3996.0\data.ms 0000 75 0000 ..; " '" ~ r: 0000 ~ f 0 :z: " 0 !! 0000 ~ ~ "l. .Q Q) :fi c: 0 Q) ~ ..t. 70 65 il ~ 0000 e 0 " 60 15 E !f e '" 0000 ~ !S Q) (fJ ~ 55 g Ii: 50 0000 @ 4500 00 4000 00 3500 00· 00 "! (fJ .; 1? ~ .J! ~ 1D E E! e .Q .s= 000 g ~ 15 E 3000 250 e t: ,g " 0 Cf) 000 t: " (fJ 200 150 000 1000 00 50 000 [!1me- 0 J. ~ ! 3.50 l . ~ l ~! 6.bo 6.50 7.50 8.bo > 2.00 2.50 3.00 4.00 _4.50 5.00 _~p 7.00 8.50 AFULLW_23.M Mon Nov 22 13:29:01 2010 - 9.00 " .'. 9.§O-1QoQO 10.50 11.00 11 ~50 Report Date: 11123/2ttroJEAlgtllO of25 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\DATA\NOVIO-C\22NOVIOA\ B83L3997.D 22 Nov 2010 11:16 am 1011399-007A SAMP 5.0ML 10F3 12 Sample Multiplier: 1 Quant Time: Nov 22 13:32:16 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_23.M Quant Title VOA Calibration QLast Update Wed Nov 17 09:42:13 2010 Response via Initial Calibration (QT Reviewed) I bundance TIC: 883L3997.0\data.ms 750000 700000 on 1 " ~ " 650000 .0 ~ !! ~ ~ u ~ Q ~ .2l !! 600000 "l. ~ Q) .Il " Q Q) ~ "'. '" ~ Q g ~ 550000 '5 E !! m I: ::I <J) 500000 450000 400000 350000 300000 250000 ~ <J) .,; " til .. .r= ! ~ 0 !! 2: g .Y 'Ii Q E "'- 200000 ~ ~ Q <J) to ::I <J) 150000 100000 50000 6.50 7.00 7.50 8.JlQJ.50 9.00 9.50 10.00 1.Q,50~00.....1!.50 AFULLW_23.M Mon Nov 22 13:32:41 2010 Report Date: 11/23/2liroJE¥agd121 of25 Data Path Data File Acq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via 1600000 1500000 1400000 1300000 1200000 1100000 900000 Quantitation Report C:\msdehem\1\DATA\NOV10-C\22NOV10A\ B74LCS20.D 22 Nov 2010 8:25 am LCS VOC 112210A LCS SEE COVERSHEET FOR ID AND AMOUNTS 3 Sample Multiplier: 1 Nov 22 08:36:55 2010 C:\MSDCHEM\1\METHODS\AFULLW_23.M VOA Calibration Wed Nov 17 09:42:13 2010 Initial Calibration (Not Rev iewed) TIC: 874LCS20.D\data.ms AFULLW_23.M Mon Nov 22 10:26:55 2010 Report Date: 11/23I2ijIm%ge122of25 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdchem\1\DATA\NOV10-C\22NOV10A\ B76LMBLK.D 22 Nov 2010 9:03 am MB VOC 112210A MBLK 5.0ML 5 Sample Multiplier: 1 Quant Time: Nov 22 10:27:13 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_23.M Quant Title VOA Calibration QLast Update Wed Nov 17 09:42:13 2010 Response via Initial Calibration (QT Reviewed) f bundance TIC: B76LMBLK.Oldat.ams 750000 ~ ~ 2! 700000 g ~ ~ <Il .2 650000 or :6 " • ~ ~-, g ~ If 'a " E j e m I: e " g en 600000 550000 II 0 ~ 500000 450000 400000 350000 en CIl. f ~ 300000 ~ ~ ~ .Q .r:; e .9 g 0 'a N_ 250000 E I: e " ,Q en 0 I: " en 200000 150000 100000 50000 J.. 2.50 3.00 4.50 5.00 _5.90 6.bo 6.50 7.00 7.50 8.09_ 8,k 9.0L~'§o_ .', 2.00 3.50 4.00 10.00 10~0 11.00 11.~ o .Ime-> AFULLW_23.M Mon Nov 22 10:27:18 2010 Report Date: 11123/2ijfmEFilgtl23 of2S Quantitation Report C:\msdehem\1\DATA\NOV10-C\22NOV10A\ 884S3993.D 22 Nov 2010 11:35 am 1011399-003AMS Data Path Data File Aeq On Operator Sample Mise MS 5.0ML 20F3 ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via undance 1150000 1100000 1050000 1000000 950000 900000 850000 750000 700000 650000 13 Sample Multiplier: 1 Nov 22 11:47:03 2010 C:\MSDCHEM\1\METHODS\AFULLW_23.M VOA Calibration Wed Nov 17 09:42:13 2010 Initial Calibration AFULLW_23.M Mon Nov 22 13:33:11 2010 (Not Reviewed) Report Date: 1 1 12312li'tmE¥eg#24 of25 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\l\DATA\NOV10-C\22NOV10A\ 885S3993.D 22 Nov 2010 11:54 am 1011399-003AMSD MSD 5.0ML 30F3 14 Sample Multiplier: 1 Quant Time: Nov 22 12:06:03 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_23.M Quant Title VOA Calibration QLast Update Wed Nov 17 09:42:13 2010 Response via Initial Calibration (Not Reviewed) TIC: 885S3993.D\data.ms 1150000 1100000 6.50000 '" 800000 i 700000 650000 400000 350000 300000 Q " ] ~ I~ !! :. 16 -jll6 100000 E ffi roE 0 u.g E .2 ~ 50000 m AFULLW_23.M Mon Nov 22 13:33:32 2010 1? .i Q) c: ~ I c: " .c I ~ 0 :! !!~ ~ ~t= ¥ :.'" ~ z ~ OJ il 0 d[ Report Date: 11123/2ijroJEl'Qg~5 of25 American West Analytical Laboratories WORK ORDER Summary Client: Denison Mines Client ID: DEN 100 Contact: Jo Ann Tischler Project: 4th Quarter-Semiam1L1al Groundwater QC Level: LEVEL III Comments: No Hal'd Copies (UL). QC 3 & Summary. EDD-CSV. Report THF to 1 ~lgl*~ •• I Sample ID Client Sample ID Colleded Date Received Date Date Due 10II399-00lA MW-4 1111512010 1:50:00 PM 11119/2010 10:30:00 AM 12/312010 IOl1399-002A M\V-17 11117/2010 12:55:00 PM 12/3/2010 1011399-003A MW-22 1111612010 12:35:00 PM 12/3/2010 1011399-004A MW-24 11117/20108:45:00 AM 1213/2010 10 11399-00SA MW-26 1II15/201O 1:02:00 PM 121312010 101 1399-006A Trip Blank 1111512010 1213/2010 1011399-007A l\'£W-2 !lII7/2010 10:00:00 AlvI 12/3/2010 Matrix Aqueous Work Order: 1011399 Page 1 ofl 1111912010 WOType: Project Test Code Sel Storage 8260-W 0 VOCFridge 8260-W ~ VOCFridge 8260-W ~ VOCFridge 8260-W ~ VOCFridge 8260-W ~ VOCFridge 8260-W ~ VOCFridge 8260-W ~ VOCFridge ~ 3 ---_. _ .... - Sheet 1 of 1 CHAIN OF CUSTODY Samples Shipped to: American West Analytical Lab 463 West 3600 South . Salt Lake City, Ut 8411 ~ Contact: Ryan Palmer or David Turk Ph: 435 678 2221 rpalmer@denisonmines.com dturk@denisonmines.com Chain of Custody/Sampling Analysis Request p rOlge t s amplers N arne s amplers 51 t Igoa ure 4th Quarter·Semiannual :JoMbL~ Groundwater Tanner Holliday Date Time SamplelD Collected Collected Laboratory Analysis Requested fl1~v t{ '·IS·1l 1:SS0 THF tI1tv 17-I ·/7·Jl1 1255 THF (;Jtv . .2:2 'I./~ -It 12J5 THF frJw :J 1./ r/ .. rl·JIJ /lX-liS-~ THF fI1 tv .;2b I). t((": / IJ ... /~d2 THF . Trip Blank 1'IS~/O THF .m/A) _bZ 'll 1'/(1 j(){I() 7Hp Please notify RYan Palmer of Reciept tempature on these sam~es Immediatelyl Thank you. Relinquished By:(Signatufe) Daterrlme ~~~ Relinquished By:(Signature) ---I Lab SetID: \. P \ 1,394 I~ I COC Tane Was: I Container. TVDe: I --/7 I 'l)e, ~ \'\\"1. ~ I ~. :.w._m Present on On~Package , ,DYes ~o DN/A Unbroken on Outer pa~ge DYes DNo ~/A , Present onjiample , ' 0 Yes ,8'No 0 N/A DC DYes DNa 'DN/A Notes: , ' Unbroken on SamgJe--' DYes DNo 8i'N/A Notes: I Properly Preserved ~es DNa DNJA I Notes: Notes: Rec. Within Hold oNo Discrepancies Between Labels and cae Notes: Bottle Type , Ammonia COD " Cyanide Metals N02 &N03 Nutrients '0&0 Phenols Sulfide TKN Toe TP04 TPH Procedure: Notes: ' Preservative , All pHs OK pH <2 H2S04 ' , " pH <2 HZS04 ./ PH >12 NaOH ./ pH<2HNOs . ' V . pH <2 H2S04 ' /' ' pH<2H:zS04 " '/ pH<2HCL / :pH <2 H2S04 ' ./ -.. pH> 9NaOH, ZnAC /' pH <2 HZS04 '/ . ' . pH<2H3P04 V pH <2 H2SO4 /' pH <2HCL V ' /. /' ./' 17 -L.... -'------Pour a small amount of sample in the sample lid Pour sample from Lid gently over wide range pH paper Do Not dip the pH paper In the sample bottle or lid ' . 1) 2) 3) 4) 5) If sample Is not preserved, properly list Us extension and receiving pH in the appropriate column above Flag COC a.nd notify client for further Instructions ,6) 7) Place client conversation on coe Samples may be adjusted at client request / V ' . . , : , . , , " . ' . . '. ' .. DYes [}ffi) ' ' , ' ' ' . , , . - A Jo Ann Tischler Denison Mines 1050 17th Street, # 950 AMERICAN Denver, CO 80265 WEST TEL: (303) 389-4132 ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director RE: 4th Quarter -Semiannual Groundwater Dear Jo Ann Tischler: Lab Set ID: 1011452 American West Analytical Laboratories received 7 sample(s) on 11123/2010 for the analyses presented in the following report. All analyses were performed in accordance to The NELAC Institute protocols unless noted otherwise. American West Analytical Laboratories is certified by The NELAC Institute in Utah and Texas; and is state certified in Colorado and Idaho. Certification document is available upon request. If you have any questions or concerns regarding this report please feel free to call. The abbreviation "SUIT" found in organic reports indicates a surrogate compound that is intentionally added by the laboratory to determine sample injection, extraction, and/or purging efficiency. The "Reporting Limit" found on the report is equivalent to the practical quantitaion limit (PQL). This is the minimum concentration that can be reported by the method referenced and the sample matrix. The reporting limit must not be confused with any regulatory limit. Analytical results are reported to three significant figures for quality control and calculation purposes. Jose Rocha Thank You, QA Officer Ky I e F. Digitally Signed by Kyle F. Gross DN: cn=Kyle F. Gross. o=AWAL. ou=AWAL, email=kyle@awal- G labs com, c=US ross Dato:2010.12.0210:57:1B-{)7'OO' Approved by: Laboratory Director or designee Report Date: 11/29/2010 Page 1 of27 AJI analyses applicable to the CWA, SDWA. and RCRA are performed in accordance to NELAC protocols. Pertinent sampling infonnatio[] is Located on the aLlached COCo This report is provided for the exclusive use of the addressee. Privileges of subsequent use of the name of this company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection with the re-publication of this report. for any purpose other than faT the addressee will be grunted only on contact. This company accepts no rcsponsibilHy except for the due performance of ins pee Lion andlor analysis in good raith and according to the rules of the trade and of science, A SAMPLE SUMMARY AMERICAN Client: Denison Mines Contact: Jo Ann Tischler WEST Project: 4th Quarter -Semiannual Groundwater Lab Set ID: 1011452 ANALYTICAL Date Received: 11123/2010 1025h LAB ORA TORIES Lab Sample ID Client Sample ID Date Collected Matrix Analysis 1011452-001A MW-l 11118/2010 1515h Aqueous VOA by GCIMS Method 463 West 3600 South 8260C/5030C Salt Lake City, DT 1011452-002A MW-3 11119/2010 0945h Aqueous VOA by GCIMS Method 84115 8260C/5030C 1011452-003A MW-12 11/19/2010 1008h Aqueous VOA by GC/MS Method 8260C/5030C 1 o 11452-004A MW-18 11/18/2010 1140h Aqueous VOA by GC/MS Method (801) 263-8686 8260C/5030C Toll Free (888) 263-8686 1011452-005A MW-19 11118/2010 1450h Aqueous VOA by GC/MS Method Fax (801)263-8687 8260C/5030C email: awal@awal-labs.com 1011452-006A MW-70 11118/2010 1140h Aqueous VOA by GC/MS Method 8260C/5030C Kyle F. Gross 101l452-007A Trip Blank 11118/2010 Aqueous VOA by GC/MS Method 8260C/5030C Laboratory Director Jose Rocha QA Officer Report Date: 11/29/2010 Page 2 of27 All analyses applicable to the CWA, SDWA, and RCRA are performed in accordance to NELAC protocols. Pertinent sampling infonnation is located on the attached coc. This report is provided for the exclusive use of the addressee. Privileges of subsequent use of the name of this company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or sale orany producL or process, or in connection with the re-publicalion of this report [or any purpose other than for the addressee will be granted only on contacl. This company accepts no responsibility except for the due perfonnance of inspection andlor analysis in good faith and according to the rules of the trade and of science. A AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Volatile Case Narrative Client: Contact: Denison Mines Jo Ann Tischler Project: Lab SetlD: Sample Receipt Information: Date of Receipt: Date(s) of Collection: Sample Condition: C-O-C Discrepancies: Method: Analysis: 4th Quarter -Semiannual Groundwater 1011452 11123/2010 11118 & 11119/2010 Intact None SW-8468260C/5030C Tetrahydrofuran General Set Comments: One sample exhibited Tetrahydrofuran above its reporting limit. Holding Time and Preservation Requirements: All samples were received in appropriate containers and properly preserved. The analysis and preparation of all samples were performed within the method holding times following the methods stated on the analytical reports. Analytical QC Requirements: All instrument calibration and calibration check requirements were met. All internal standard recoveries met method criterion. Batch QC Requirements: MB, LCS, MS, MSD, RPD, and Surrogates: Method Blanks (MBs): No target analytes were detected above reporting limits, indicating that the procedure was free from contamination. Laboratory Control Sample (LCSs): All LCS recoveries were within control limits, indicating that the preparation and analysis were in control. Matrix Spike / Matrix Spike Duplicate (MSIMSD): All percent recoveries and RPDs (Relative Percent Differences) were inside established limits, indicating no apparent matrix interferences. Surrogates: All surrogate recoveries were within established limits. Corrective Action: None required. Report Date: 11/29/2010 Page 3 of27 All analyses applicable to Lhe CW A. SDWA, and ReRA are performed in accordance to NELAC protocols. Pertinent sampling infonnaLion is located OD the attached COCo This report is provided for Lhe exclusive use of Lhe addressee. Privileges of subsequent use of the name of this company or any member cfils staff, or reproduction of this report in connection with the advertisemenL, promotion or sale or any product or process, or in connection with the re-publication ofthjs report [or any purpose other than for the addressee will be granted only on contact. This company accepts no responsibility except for the due perfonnance of inspection and/or analysis in good faith and according to the rules of the trade and of science. A Client: Denison Mines Lab Set ID: 1011452 Project: 4th Quarter -Semiannual Groundwater Sample ID Analyte LCS VOC 112410A Tetrahydrofuran LCS VOC 1124IOA Surr: 1,2-Dichloroethane-d4 LCS VOC 112410A SUIT: 4-Bromofluorobenzene LCS VOC 1124IOA Surr: Dibromofluoromethane LCS VOC 112410A Surr: Toluene-d8 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Units Ilg/L %REC %REC %REC %REC Salt Lake City, UT 84115 (801) 263-8686. Toll Free (888) 263-8686. Fax (801) 263-8687 e~mail: awa1@awal-labs,com, web: www.awal-labs.com QC SUMMARY REPORT Dept: MSVOA QC Type: LCS Amount Original Method Result Spiked Amount %REC SW8260C 20.0 20.00 0 100 SW8260C 51.8 50.00 104 SW8260C 49.3 50.00 98.5 SW8260C 50.2 50.00 100 SW8260C 49.6 50.00 99.2 Limits 43-146 69-132 85-118 80-120 81-120 Kyle F. Gross Laboratory Director Jose Rocha QA Officer %RPD RPD Limit Qualifiers Analysis Date 1112412010 11/2412010 1112412010 1112412010 1112412010 Report Date: 11129/2010 Page 11 of27 All analyses applicable to the CW A, SDWA, and RCRA arc performed in accordance to NELAC protocols. Pertinent sampling information is located on the attached COCo This report is provided for the exclusive usc of the addressee. Privileges of subsequent usc o[thc name armis company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or sale orany product or process, or in connection with the rc-publication of this report for any purpose o1herthan fOT the addressee will be granted only on contact. This company accepts no responsibility except for the due perfonnancc of inspection and/or analysis in good faith and according to the rules of the trade and of science. A Client: Denison Mines Lab Set ID: 1011452 Project: 4th Quarter -Semiannual Groundwater Sample ID Analyte MB VOC 112410A Tetrahydrofuran MB VOC 112410A Surr: 1,2-Dichloroethane-d4 MB VOC 112410A Surr: 4-Bromofluorobenzene MB VOC 112410A Surr: Dibromofluoromethane MB VOC 112410A Surr: Toluene-dS AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Units 11g/L %REC %REC %REC %REC Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 263-8686. Fax (801) 263-8687 e-mail: awal@awaJ-labs.com, web: www..awal-Iabs.com QC SUMMARY REPORT Dept: MSVOA QC Type: :MBLK Amount Original Method Result Spiked Amount %REC SWS260C < 1.00 SWS260C 52.9 50.00 106 SWS260C 52.2 50.00 104 SWS260C 50.3 50.00 101 SWS260C 50.3 50.00 101 Limits 69-132 S5-11S SO-120 SI-120 Kyle F. Gross Laboratory Director Jose Rocha QA Officer Analysis % RPD RPD Limit Qualifiers Date 11124/2010 11124/2010 11/2412010 1112412010 11/2412010 Report Date: 1112912010 Page 12 of27 All analyses applicable to the CWA, SOW ~ and ReRA are performed in accordance to NELAe prolacols. Pertinent sampling information is located on the attached CDC, This report is provided fOT the exclusive usc of the addressee. Privileges of subsequent usc of the name of this company or any member of its staff, or reproduction of this report in conncction with the advertisement, promotion or sale of any product or process, or in connection with the re~publication of this report for any purpose other than for the addressee will be granted only on contact. This company accepts no responsibility except for the due performance of inspection and/or analysis in good faith and according 10 the rules of the uade and of science. A Client: Denison Mines Lab Set ID: 1011452 Project: 4th Quarter -Semiannual Groundwater Sample ID Analyte 101 1452-001AMS Tetrahydrofuran 1011452-001AMS Surr: 1,2-Dichloroethane-d4 1011452-001AMS Surr: 4-Bromofluorobenzene 1011452-001AMS Surr: Dibromofluoromethane 1011452-001AMS Surr: Toluene-dS 1011464-001AMS Tetrahydrofuran 1011464-001AMS Surr: 1,2-Dichloroethane-d4 1011464-001AMS Surr: 4-Bromofluorobenzene 1011464-001AMS Surr: Dibromofluoromethane 1011464-001AMS Surr: Toluene-dS AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Units f-lg/L %REC %REC %REC %REC f-lg/L %REC %REC %REC %REC Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 263-8686, Fax (801) 263-8687 e-mail: awal@awlll.labs,com, web: www.awal-labs.com QC SUMMARY REPORT Dept: MSVOA QCType: MS Amount Original Method Result Spiked Amount %REC SWS260C 36.6 20.00 10.70 130 SWS260C 54.S 50.00 110 SWS260C 49.5 50.00 9S.9 SWS260C 51.2 50.00 102 SWS260C 4S.3 50.00 96.7 SWS260C 22.0 20.00 0 110 SWS260C 54.S 50.00 110 SWS260C 49.4 50.00 9S.7 SWS260C 51.2 50.00 102 SWS260C 4S.2 50.00 96.4 Limits 43-146 77-144 SO-123 SO-124 SO-125 43-146 77-144 SO-123 SO-124 SO-125 Kyle F. Gross Laboratory Director Jose Rocha QA Officer %RPD RPD Limit Qualifiers Analysis Date 1112412010 1112412010 1112412010 1112412010 11/2412010 1112412010 1112412010 1112412010 1112412010 1112412010 Report Date: 11129/2010 Page 13 of27 AU analyses applicable to the CWA, SDWA, and RCRA arc performed in accord.s.ncc to NELAe protocols, Pcrtincntsamplinginformation is located on the attacbcdCOC, This report is provided for Lbc exclusive usc of the addressee. Privileges orsubscquc:nt usc orthe Dame oflhis company or Bny rncmbcrorits st.arr, or reproduction orthis report in connection with the advertisement, promotion or sale orany product or process, or in connectioo with the rc-publication of this report (or aoy purpose other than fOr the addressee will be granted only on contact This company accepts no responsibilily except for the due performance of inspection and/or analysis in good faith and according to the rules of the trade and of science. A Client: Denison Mines Lab Set ID: 1011452 Project: 4th Quarter -Semiannual Groundwater SampleID Analyte 1011452-OOIAMSD Tetrahydrofuran 1011452-001AMSD Surr: 1,2-Dichloroethane-d4 1011452-001AMSD Surr: 4-Bromofluorobenzene 1011452-001AMSD Surr: Dibromofluoromethane 1011452-OOIAMSD Surr: Toluene-dS 1011464-001AMSD Tetrahydrofuran 1011464-001AMSD Surr: 1,2-Dichloroethane-d4 1011464-001AMSD Surr: 4-Bromofluorobenzene 1011464-OO1AMSD Surr: Dibromofluoromethane 101 1464-001AMSD Surr: Toluene-dS AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Units 1Lg/L %REC %REC %REC %REC 1Lg/L %REC %REC %REC %REC Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 263-8686, Fax (801) 263-8687 e-mail: awa1@awal-labs.com. web: www.awa1-1abs.com QC SUMMARY REPORT Dept: MSVOA QCType: MSD Amount Original Method Result Spiked Amount %REC SW8260C 36.2 20.00 10.70 127 SW8260C 54.2 50.00 lOS SWS260C 50.3 50.00 101 SW8260C 51.3 50.00 103 SWS260C 4S.S 50.00 97.5 SWS260C 22.5 20.00 0 113 SWS260C 54.9 50.00 110 SWS260C 49.6 50.00 99.2 SWS260C 5L7 50.00 103 SWS260C 4S.1 50.00 96.2 Limits 43-146 77-144 SO-123 SO-124 SO-I25 43-146 77-144 SO-123 SO-124 SO-125 Kyle F. Gross Laboratory Director Jose Rocha QA Officer Analysis %RPD RPD Limit Qualifiers Date L21 25 1112412010 2.43 25 11124/2010 1112412010 11124/2010 1112412010 1112412010 11124/2010 1112412010 1112412010 1112412010 Rqxnt Date: 1112912010 Page 14 of27 AU analyses applicable to the CW A. SDWA. and RCRA arc pcrfonncd in accordance to NElAC protocols. Pcrtincntsampling infonnation is located on 1.hc attached COCo This repon is provided for the exclusive usc of the addressee. Privileges of subsequent use of the name of Ibis company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection with the re-publiCD.tion oflhis report for any purpose other than for thc addressee win be granted only aD contact. This company accepts no responsibility except for the due performance ofinspection and/or analysis in good faith and according to the rules of the trade and of science. Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\DATA\NOVIO-C\24NOVIOA\ C84L4521.D 24 Nov 2010 4:38 pm 101l452-001A SAMP 5.0ML lOF3 15 Sample Multiplier: 1 Quant Time: Nov 29 10:29:53 2010 Quant Method C:\msdehem\1\METHODS\AFULLW_24.M Quant Title VOA Calibration QLast Update Mon Nov 29 10:10:12 2010 Response via Initial Calibration (QT Reviewed) (t\.bundance TIC; C84L4521.D\data.ms 1400000 1350000 1300000 1250000 1200000 1150000 1100000 1050000 1000000 950000 900000 850000 800000 750000 700000 650000 600000 550000 q " q co .. i!! 500000 .c 16 Jl! E e ~ 450000 g ..Q '5 -6 E 15 400000 i N_ I ~ (/) 350000 1ii f- 300000 250000 200000· 150000 100000 50000 ""'--"':=------""=-_5!<:.""00"---'g.50 6.po 6.50 7.00 7.50 8.00 8.50 9.00 AFULLW_24.M Mon Nov 29 10:30:13 2010 Report Date: 1l/29/201~g.agei5 of27 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via Quantitation Report C:\msdehem\l\DATA\NOV10-C\24NOV10A\ C94L4522.D 24 Nov 2010 7:48 pm 1011452-002A SAMP 5.0ML 10F3 25 Sample Multiplier: 1 Nov 27 14:08 :33 2010 C:\MSDCHEM\1\METHODS\AFULLW_24.M VOA Calibration Wed Nov 24 15:45:52 2010 Initial Calibration (QT Reviewed) , bundanc e TIC: C94L4522.D\cIata.ms 1300000 1250000 ui 'i' <D 1200000 C ~ ..1l 1150000 e .Q G 1100000 0 ..r -~ ~ c :a " 1050000 ..1l I:! 1000000 <J) .Q t 1i ~ * <D 950000 .0 0 e ~ g '5 900000 850000 1f E e " m ~ 5 " .0 <J) e 0 " u:: 800000 0 ~ 750000 700000 650000 600000 550000 500000 <4. rIl 450000 " t " ~ ~ q; ~ E E! 0 400000 0 il " '5 0 E N_ I:! 350000 ,g 5 0 5 rIl rIl 300000 250000 200000 150000 100000 50000 me-> ..A. ~ ! ~ 5.00 1 6.00 6.50 8.50 2.00 2.50 3.00 3.50.--1:.99 4.50 5.50 7.00 7.50 8.00 o AFULLW_24.M Sat Nov 27 14:21:38 2010 9.00 9.50 10.00 10.50 11.00 11.50 Report Date: 11/29/21HOg.agei6of27 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\DATA\NOV10-C\24NOV10A\ C95L4523.D 24 Nov 2010 8:07 pm 1011452-003A SAMP 5.0ML 10F3 26 Sample Multiplier: 1 Quant Time: Nov 27 14:08:55 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_24.M Quant Title VOA Calibration QLast Update Wed Nov 24 15:45:52 2010 Response via Initial Calibration (QT Reviewed) I undance 1300000 TIC: C95L4523.D\data.ms 1250000 1200000 1150000 1100000 1050000 1000000 950000 900000 850000 800000 750000 700000 650000 600000 550000 500000 450000 400000 350000 ~ (/) 300000 250000 200000 150000 100000 50000 3.00 3.50 4.00 4.,~50"--="--,,,, ~--=::=-~ !l!.-...!.::>!l!.-~!l!.-~~....2:.!~..;9~,50~--'.:1O.00 10.50 11 .00 11 .50 AFULLW_24.M Sat Nov 27 14:22:11 2010 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via Quantitation Report C:\msdehem\1\DATA\NOV10-C\24NOV10A\ C96L4524.D 24 Nov 2010 8:26 pm 1011452-004A SAMP 5.0ML 10F3 27 Sample Multiplier: 1 Nov 27 14:09:27 2010 C:\MSDCHEM\1\METHODS\AFULLW_24.M VOA Calibration Wed Nov 24 15:45:52 2010 Initial Calibration (QT Reviewed) undance TIC: C96L4524.0\data.ms 1200000 1150000 l ' 00000 1050000 1000000 950000 900000 850000 800000 750000 700000 650000 600000 550000 500000 450000 400000 350000 300000 250000 200000 150000 10.0000 50000 o l ~ Ime-> 2.00 2.50 3.00. 3.50. 4.00. 4.50 5.0.0 5.50 6.0.0. 6.50 7.0.0 7:~0 8~ 8:50 91 0 9.50 10.00. 1 C~50 11 ~OO 11 .50 AFULLW_24.M Sat Nov 27 14:22:44 2010 Report Dare: 1112912<H~g"age48 of27 Quantitation Report Data Path Data File Aeq On Operator Sample Mise C:\msdehem\1\DATA\NOVI0-C\24NOVI0A\ C97L4525.D 24 Nov 2010 8:45 pm 1011452-005A SAMP 5.0ML 10F3 ALS Vial 28 Sample Multiplier: 1 Quant Time: Nov 27 14:09:51 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_24.M Quant Title VOA Calibration QLast Update Wed Nov 24 15:45:52 2010 Response via Initial Calibration ~undance 1200000 1150000 1100000 1050000 1000000 950000 900000 850000 800000 750000 700000 650000 600000 550000 500000 450000 400000 350000 300000 250000 200000 150000 100000 TIC: C97L452 fnme-> 2.00 2.50 3.00 3.50 4.00 4.50 !i.bo 5.5..9~!bo 6.50 AFULLW_24.M Sat Nov 27 14:23:17 2010 (QT Reviewed) 5.D\data.ms ui' "0 ;, "' " ~ " ..c e .Q .s;; (,) ..., ~ " .. "' IS ] e C/) .Q ~ .s;; .11 " 0 ~ .;;, .. ..c 0 e g li1 '5 E e m I: ::I C/) ~ 7.00 7.50 8.00 8.50 9.00 9.50 10.g0 10.50_11 .00 11 .50 Report Date: 11129/2(ijijg.agei90f27 Data Path Data File Acq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\DATA\NOV10-C\24NOV10A\ C98L4526.D 24 Nov 2010 9:04 pm 1011452-006A SAMP 5.0ML 10F3 29 Sample Multiplier: 1 Quant Time: Nov 27 14:10:12 2010 Quant Method C:\msdehem\1\METHODS\AFULLW_24.M Quant Title VOA Calibration QLast Update Wed Nov 24 15:45:52 2010 Response via Initial Calibration (QT Reviewed) undanc e TIC: C98L4526.D\dala./'hs 1200000 1150000 !4I ~ ., ~ 1100000 ~ .2 .t= () 1050000 ~ ..; "9 ., 1000000 " ., N " ., -" e 950000 <f) .Q Ii ~ 0 " ..t_ ~ 900000 .,-., ~ -" " e OJ g ~ i '5 E e ~ m 850000 800000 u. I: 0 :> ~ <f) 750000 700000 650000 600000 550000 500000 CIl. CIl. ~ ., i i e .2 g :fi '5 0 E "'-.s :> 0 en ~ en 450000 400000 350000 300000 250000 200000 150000 100000 .J.. ~ ~ 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 8.50 50000 o Ime--> AFULLW_24.M Sat Nov 27 14:23:50 2010 9.00 9.50 1Q-il0 10.50 11 .00 11~ Report Date: 11I29/2<HOg"ageiO of27 Data Path Data File Acq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\DATA\NOV10-C\24NOV10A\ C99L4527.D 24 Nov 2010 9:23 pm 1011452-007A SAMP 5.0ML 10F3 30 Sample Multiplier: 1 Quant Time: Nov 27 14:10:34 2010 Quant Method C:\msdchem\1\METHODS\AFULLW_24.M Quant Title VOA Calibration QLast Update Wed Nov 24 15:45:52 2010 Response via Initial Calibration (QT Reviewed) \Abundance nc: C99L4527.0\data.ms 1300000 1250000 ~ 1! 1200000 ~ 1l E! 1150000 ~ u ..; 0 ~ '!'l ~ <= 1100000 fa .8 E! 1050000 0 (J) ~ .; 0 <= 1000000 ~ .i:. .. 0 .c ~ E! 950000 oj g re '6 E <= E! 900000 1l m E! I: 0 " " (J) u: 850000 0 ~ 800000 750000 700000 650000 600000 550000 500000 <4 <4 CD 1! <= l'! no 450000 .c 1;; 1;; E! E 0 E! :2 ~ ." 400000 0 0 N_ E E! ~ of! 350000 0 (J) I: " (j) 300000 250000 200000 150000 100000 50000 0 J.. ~ A 3.50 4.bo 4.W I 5.50 6.50 7.~0 a.bo 8.50 Inme-> 2.00 2.50 3.00 5.00 6.00 7.00 AFULLW_24.M Sat Nov 27 14:24:23 2010 9.00 9.50 10.00 10.50 11.00 11 ~50 Report Date: 11/29/2<H~g.8geil of27 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\l\DATA\NOVlO-C\24NOVlOA\ C8lLCS20.D 24 Nov 2010 3:41 pm LCS VOC 112410A LCS SEE COVERSHEET FOR ID AND AMOUNTS 12 Sample Multiplier: 1 Quant Time: Nov 29 10:19:23 2010 Quant Method C:\msdehem\1\METHODS\AFULLW_24.M Quant Title VOA Calibration QLast Update Mon Nov 29 10:10:12 2010 Response via Initial Calibration 2500000 2400000 2300000 2200000 2100000 2000000 1900000 1800000 1700000 1600000 1500000 1400000 1300000 .,; " " 1200000 ~ il e g u:: n ~ AFULLW_24.M Mon Nov 29 10:19:25 2010 'I 18 ~ " " ~ t: " en (Not Reviewed) <Ii "0 " " ~ .lll e .Q ~ () ~ Report Date: 11/29/2cHOg.ligei20f27 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\DATA\NOV10-C\24NOV10A\ C83LMBLK.D 24 Nov 2010 4:19 pm MB VOC 112410A MBLK 5.0ML 14 Sample Multiplier: 1 Quant Time: Nov 24 16:32:06 2010 Quant Method C:\msdehem\1\METHODS\AFULLW_24.M Quant Title VOA Calibration QLast Update Wed Nov 24 15:45:52 2010 Response via Initial Calibration (QT Reviewe d) e IAbundanc 1400000 TIC: C83LMBlK.O\dala.ms 1350000 .; -0 ~ 1300000 :a co .lIl ..j" !2 'i' .l2 " .c; co <..l " 0 j ~ !2 .l2 1250000 1200000 1150000 00. ~ :g ~ ~ " 0 1100000 ~ ~ !2 g 1050000 oj 1i co E " !2 ~ m 1000000 " 1= ~ " !2 00 0 950000 .i! LL 0 ~ 900000 850000 800000 750000 700000 650000 600000 00 ell. .; :g a ~ .c; 15 !2 E .l2 550000 500000 !2 .c; 0 -" " 0 450000 <= t't 0 E !2 15 ,Q 0 00 400000 15 00 350000 300000 250000 200000 150000 100000 50000 J.. 4.bo 4.50 I 5.~L 6.bo 6.50 2.00 2.50 3.00 3.50 5.00 7.00 7.50 8.00 8.50 o Ime-> AFULLW_24.M Wed Nov 24 16:32:24 2010 9.bo 9.50 10.00 10.50 11.00 1 1 .~Q.. Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\l\DATA\NOV10-C\24NOV10A\ C87S4521.D 24 Nov 2010 5:35 pm 1011452-001AMS MS 5.0ML 20F3 18 Sample Multiplier: 1 Quant Time: Nov 24 17:47:23 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_24.M Quant Title VOA Calibration QLast Update Wed Nov 24 15:45:52 2010 Response via Initial Calibration (Not Reviewed) TIC: C87S4521 .D\data.ms 1300000 AFULLW_24.M Wed Nov 24 18:08:57 2010 Report Date: 1lI29/2!HOg.agci4of27 Quantitation Report C:\msdehem\1\DATA\NOV10-C\24NOV10A\ C89S4641.D 24 Nov 2010 6:13 pm 1011464-001AMS Data Path Data File Aeq On Operator Sample Mise MS 5.0ML 20F3 ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via 1900000 1800000 1600000 1500000 1400000 1300000 1200000 1100000 20 Sample Multiplier: 1 Nov 24 18:25:27 2010 C:\MSDCHEM\1\METHODS\AFULLW_24.M VOA Calibration Wed Nov 24 15:45:52 2010 Initial Calibration AFULLW_24.M Wed Nov 24 18:26:35 2010 (Not Reviewed) Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdchem\1\DATA\NOV10-C\24NOV10A\ C88D4521.D 24 Nov 2010 5:54 pm 1011452-001AMSD MSD 5.0ML 30F3 19 Sample Multiplier: 1 Quant Time: Nov 24 18:06:21 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_24.M Quant Title VOA Calibration QLast Update Wed Nov 24 15:45:52 2010 Response via Initial Calibration (Not Reviewed) TIC: C88D4521 .D\data.ms .; 1700000 '? i!! III c: 1600000 ~ .SI ~ "" 1500000 "; 0 fa "l. 1400000 co '? g " 1300000 i (/) of c: " oj I c: I ~ E 1000000 .& E' a! g () u:: 900000 0 fa 700000 en 600000 of c: .. ~ 0 500000 I!! il Ci gl ~ () il g 11 jt ~ I~ {j~~ ~ t:g 2-15 ~ ~ ~~ <~ w 0 ()~ ~ 100000 AFULLW_24.M Wed Nov 24 18:09:30 2010 I i ~ ~ .,.SI j:§ ~.f!I>;-~~ z~ 8-~ 0 ~ Report Date: 11129/2!Hijg.agei60f27 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\l\DATA\NOV10-C\24NOV10A\ C90D4641.D 24 Nov 2010 6:32 pm 1011464-001AMSD MSD 5.0ML 30F3 21 Sample Multiplier: 1 Quant Time: Nov 24 18:44:32 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_24.M Quant Title VOA Calibration QLast Update Wed Nov 24 15:45:52 2010 Response via Initial Calibration 1400000 1300000 AFULLW_24.M Sat Nov 27 14:04:10 2010 (Not Reviewed) I ! "_-_0_-__ O_~_I American West Analytical Laboratories WORK ORDER Summary WorltOrder: 1011452 Client: Denison Mines Page 1 of 1 Client ID: DEN 100 Contact: Jo Ann Tischler 11123/2010 Project: 4th Quarter-Semiannual Groundwater QC Level: LEVEL ill WO Type: Project Comments: No Hard Copies (UL). QC 3 & Summary. EDD-CSV. Report TID' to 1 J.1~Qz;:, _.~ \ SaroplelD Client Sample ID Collected Date Received Date Date Due Matrix Test Code Sel Storage 1011452·001A MW-I III 1 812010 3:15:00 PM 1112312010 10:25:00 AM 121912010 Aqueous 0 8260·W ~ VOCFridge 3 iOI1452·002A MW-3 11119120109:45:00 AM 121912010 8260-W ~ VOCFridge 1011452·003A MW-12 11/1912010 10:08:00 AM 12/9/2010 8260-W ~ VOCFridge IQ1l452-004A MW·18 1111812010 II:40:00 AM 1219/2010 8260-W ~ VOCFridge 101 1452-005A MW-19 11118120102:50:00 PM 12/912010 8260-W ~ VOCFridge 101 1452·006A MW-70 11/18/2010 11:40:00 AM 12/912010 8260-W ~ VOCFridge 1011452"()07A Trip Blank 1111812010 1219/2010 8260-W ~ VOCFridge · ---.------- Ie //'-/52- Sheet 1 of 1 r CHAIN OF CUSTODY Samples Shipped 10: American West Analytical Lab 463 West 3600 South Contact: Ryan Palmer or David Turk Ph: 435 678 2221 Salt Lake City, Ut 84115 rpalmer@denisonmines.com dturk@denisonmines.com Chain of Custody/Sampling Analysis Request Pro'ect 4th Quarter-Semiannual Groundwater Sample 10 MW1 MW3 MW 12 MW 18 MW 19 MW70 Trip Blank Date Collected 11/18/2010 11/19/2010 11/19/2010 11/18/2010 11/18/2010 11/18/2010 11/18/2010 Samplers Name Tanner Hollida Time Collected Laboratory Analysis Requested 1515 THF 945 THF 1008 THF 1140 THF 1450 THF 1140 THF THF Please notify Ryan Palmer of Reciept tempature on these samples ImmediateM Thank you. Relinquished By:(Signature .::.J~~ Dateffime Received By:(Signature) 11/22/2010 1130 DatefTime Received By:(Signature) c} f Dateffime ~?)e/Time %.3;& (0 -. --.--------_._-----------------, Lab SetID: ! {J (f liS-v Samples Were: COC Tape Was: Container Tvpe: No. Rec. aShipped By: IA y?S Present on Outer Package o A WAL Supplied Plastic D Hand Delivered A: Yes DNa DNIA ~ AL Supplied Clear Glass o Ambient Unbroken 011 Outer pacl,age o A WAl>S.uoolied Amber Glass ~Chilled J?iYes ONe DN/A o AWAL SU~TOC/TOX Vials Temperature ).b °C Present on Sample o Amber 0 Clear adspace 0 No Headspace Rec, BrokenlLeakiog DYes llNo ON/A ' 'DYes ONe ~A D Non A WAL Supplied ~iller Notes: . Unbroken on Sample Notes: ~ DYes ONe ~N/A Properly Preserved j('Yes ONo DNIA Notes: Notes: \ . Rec, Within Hold if Yes DNo Discrepancies Between Labels and coe Notes: \ Notes: , , , -Bett!.eType Preservative , AllpHsOK' AmmOlua--_ pH <2 H2S04 COD ~S04 Cyanide PH>12NaOH ~ . , Metals pH <2 HNOs -r----.- N02 &NOs pH <2 H2SO4 --Nutrients pH <2 H2SO4 .---.. O&G pH<2HCL --.. Phenols , ,pH <2 H2S04 ' -----t-'--I ' , Sulfide pH> 9NaOH, ZnAC .......... r--.... " TKN pH <2 H2SO4 ........... t- TOC . pH <2 HjPO~ .............. TP04 TPH Procedure: 1) 2) 3) 4) 5) ,6) 7) pH <2 H2SO4 pH<2HCL --_. ---- Pour a small amount of sample in the sample lid Pour sample from Lid gently over wide range pH paper Do Not dip the pH paper In the sample bottle or lid . , , '----- If sample is not preserved. properly list Its extension and recE1iving pH in the appropriate column above Flag COC and notify client for further instructions Place client conversation on coe . Samples may be adjusted at client request ............. .............. ' ............ -- DYes .. . : . .......... r-......... .............. -- MNo \ I . __ .. ----- UPS Internet Shipping: Shipment Label UPS Internet Shipping: View/Print Label I. Print the label(s}: Select the Print button on the print dialog box that appears. Note: If your browser does not support this function select Print from the File menu to print the label. 2. Fold the printed label at the solid line below. Place the label in a UPS Shipping Pouch. If you do not have a pouch, affix the folded label using clear plastic shipping tape over the entire label. 3. GETTING YOUR SHIPMENT TO UPS Customers without a Daily Pickup Schedule a same day or future day Pickup to have a UPS driver pickup all of your Internet Shipping packages. Hand the package to any UPS driver in your area. Take your package to any location of The UPS Store®, UPS Drop Box, UPS Customer Center, UPS Alliances (Office Depot® or Staples®) or Authorized Shipping Outlet near you. Items sent via UPS Return ServicesSM (including via Ground) are also accepted at Drop Boxes. To find the location nearest you, please visit the 'Find Locations' Quick link at ups.com. Customers with a Daily Pickup Your driver will pickup your shipment(s) as usual. FOLD HERE Page 1 of 1 https:/ /www.ups.com/uis/create?ActionOriginPair=print_Receipt&POPUP_LEVEL=1...11122/20 10 A Jo Ann Tischler Denison Mines 1050 17th Street, # 950 AMERICAN Denver, CO 80265 WEST TEL: (303) 389-4132 ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director RE: 4th Quarter Semi Annual Ground Water Dear Jo Ann Tischler: Lab Set ID: 1011479 American West Analytical Laboratories received 4 sample(s) on 11/24/2010 for the analyses presented in the following report. All analyses were performed in accordance to The NELAC Institute protocols unless noted otherwise. American West Analytical Laboratories is certified by The NELAC Institute in Utah and Texas; and is state certified in Colorado and Idaho. Certification document is available upon request. If you have any questions or concerns regarding this report please feel free to call. The abbreviation "Surr" found in organic reports indicates a surrogate compound that is intentionally added by the laboratory to determine sample injection, extraction, and/or purging efficiency. The "Reporting Limit" found on the report is equivalent to the practical quantitaion limit (PQL). This is the minimum concentration that can be reported by the method referenced and the sample matrix. The reporting limit must not be confused with any regulatory limit. Analytical results are reported to three significant figures for quality control and calculation purposes. Jose Rocha Thank You, QA Officer Ky I e F. Digitally signed by Kyle F. Gross ON: cn=Kyle F. Gross. o=AWAL. ou=AWAL. email=kyle@awal- G labs.com. c=US ro S S Date: 2010.12 0715:41:31-07'00' Approved by: Laboratory Director or designee Report Date: 121712010 Page I of 21 All analyses applicable to the CW A. SDWA. and RCRA are perfonmed in accordance to NELAC protocols. Pertinent sampling infonmation is located on thc attached CDC. This report is provided for the exclusive usc of the addressee. Privileges of subsequent use of Lhe name of this company or any member of its staff, or reproduction of this rcporL in connection with the advertisement, promotion or sale of any product or process, or in connection wiL,h the n:~public~lion Oflh~s rep0r1: for a~y purpose other than for the addressee wiIJ be gran led only on contacl. This company accepls no responsibility excepl for the due pcrfonnanee of inspection andlor analysis in good failh A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Client: Project: Lab Set ID: Date Received: Lab Sample ID 1011479-001A 1011479-002A 1011479-003A 1011479-004A SAMPLE SUMMARY Denison Mines 4th Quarter Semi Annual Ground Water 1011479 11124/2010 1040h Client Sample ID Date Collected MW-3A 11122/2010 0940h MW-20 11122/2010 1245h MW-23 11122/2010 1030h Trip Blank 1112212010 Contact: Jo Ann Tischler Matrix Analysis Aqueous VOA by GC/MS Method 8260CI5030C Aqueous VOA by GC/MS Method 8260CI5030C Aqueous VOA by GC/MS Method 8260CI5030C Aqueous VOA by GC/MS Method 8260CI5030C Report Date: 121712010 Page2of21 All analyses applicable Lo the CWA, SDWA, and RCRA are performed in accordance 10 NELAC proLocols. PertinenL sampling informalion is located on the aLtached COCo This report is provided for the exclusive use of Ihe addressee. Privileges of subsequent usc of lhe name of this company or any member of its stalT, or reproduction of this report in connection wiLh the advertisement, promotion or sale of any product or process, or in connection wit.h the r~:pubJjc?tion .ofth~s.report for a~y purpose other Lban for the addressee will be granted only on contact. This company accepts no responsibility excepl for lhe due perronnance or inspl.."Ction and/or analysis in good faith A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer V olatile Case Narrative Client: Contact: Denison Mines Jo Ann Tischler Project: Lab SetID: Sample Receipt Information: Date of Receipt: Date of Collection: Sample Condition: C-O-C Discrepancies: Method: Analysis: 4th Quarter Semi Annual Ground Water 1011479 11124/2010 11122/2010 Not Intact None SW-846 8260C/5030C Tetrahydrofuran General Set Comments: Tetrahydrofuran was not observed above its reporting limit. One vial for sample "MW 3A" (lOl1479-001A) was received frozen and broken. Holding Time and Preservation Requirements: All samples were received in appropriate containers and properly preserved. The analysis and preparation of all samples were performed within the method holding times following the methods stated on the analytical reports. Analytical QC Requirements: All instrument calibration and calibration check requirements were met. All internal standard recoveries met method criterion. Batch QC Requirements: MB, LCS, MS, MSD, RPD, and Surrogates: Method Blanks (MBs): No target analytes were detected above reporting limits, indicating that the procedure was free from contamination. Laboratory Control Sample (LCSs): All LCS recoveries were within control limits, indicating that the preparation and analysis were in control. Matrix Spike / Matrix Spike Duplicate (MS/MSD): All percent recoveries and RPDs (Relative Percent Differences) were inside established limits, indicating no apparent matrix interferences. Surrogates: All surrogate recoveries were within established limits. Corrective Action: None required. Report Date: 121712010 Page 3 of21 All analyses applicable to the CW A, SDWA. and RCRA are performed in accordance to NELAC protocol,. Pertinent sampling information is located on the attached COCo This report is provided for the exclusive usc of the addressee. PriviJeges of subsequent use of the name of this company or any member of its staff, or reproduction of this report in connection with the advertisemenL, promotion or sale of any product or process, or in connection wil,h lhe T~-public?tion of lh!s report. for a,!'lY pU'r0se other than [or the addressee will be granted only on contact. This company accepts no responsibility except for the due pcrfonnancc or inspection and/or analysis in good faith A Client: Denison Mines Lab Set ID: 1011479 Project: 4th Quarter Semi Annual Ground Water Sample ID Analyte LCS VOC 112710A Tetrahydrofuran LCS VOC 112710A Surr: 1,2-Dichloroethane-d4 LCS VOC 112710A Surr: 4-Bromofluorobenzene LCS VOC 112710A Surr: Dibromofluoromethane LCS VOC 112710A Surr: Toluene-d8 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 263-8686, Fax (801) 263-8687 e-mail: awal@awal~labs.com. web: www.awal-Iabs.com C SUMMARY REPORT Contact: Dept: Jo Ann Tischler MSVOA QC Type: LCS Amount Original Units Method Result Spiked Amount %REC Limits 11g/L SW8260C 18.1 20.00 0 90.7 43-146 %REC SW8260C 54.6 50.00 109 69-132 %REC SW8260C 48.4 50.00 96.9 85-118 %REC SW8260C 51.7 50.00 103 80-120 %REC SW8260C 47.9 50.00 95.8 81-120 Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limit Qual Date Analyzed 11127/2010 1514h 11127/2010 1514h 11127/2010 1514h 11127/2010 1514h 11127/2010 1514h Report Date: 121712010 Page8of21 An analyses applicable to the CWA, SDWA, and RCRA arc pcrfonncd in accordance to NELAC protocols Pertinent sampling information is located on the attached cae, This report is provided for the exclusive usc orthc addressee. Privileges of subsequent use oflhc name of this company or any member of its staff. or reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or 1n cOnnection with the rc-publication of this report for any purpose other than for thc addressee will be granted only on contact. This company accepts no responsibility except for the due performance of inspection and/or analysis in good A Client: Denison Mines Lab Set ID: 1011479 Project: 4th Quarter Semi Annual Ground Water Sample ID Analyte MB VOC 112710A T etrahydrofuran MB VOC 112710A SUIT: 1,2-Dichloroethane-d4 MB VOC 112710A Surr:4-Bromofluorobenzene MB VOC 112710A Surr: Dibromofluoromethane MB VOC 112710A Surr: Toluene-d8 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Units I1g1L %REC %REC %REC %REC Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 263-8686, Fax (801) 263-8687 e-mail: awal@awal-labs.com, web: www.awal-labs.com C SUMMARY REPORT Contact: Dept: QCType: Amount Original Jo Ann Tischler MSVOA MBLK Method Result Spiked Amount %REC Limits SW8260C < 1.00 SW8260C 55.4 50.00 III 69-132 SW8260C 53.4 50.00 107 85-118 SW8260C 51.1 50.00 102 80-120 SW8260C 50.4 50.00 101 81-120 Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limit Qual Date Analyzed 11/27/2010 1552h 11/27/2010 1552h 11127/2010 1552h 11/27/2010 1552h 11/27/2010 1552h Report Date: 121712010 Page 9 of21 All analyses applicablcto the CWA, SDWA. and ReRA are pcrfonncd in accordance to NELAC protocols. Pertinent sampling information is located on the attached COCo This report is provided for the exclusive usc ofthc addressee. Privileges ofsubscqucnt usc crthc name of this company or any member of its staff, orrcproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection with the rc-publication of this report for any purpose other than for the addressee \Yill be granlcd only 00 contact" This company accepts no responsibilily except ror the due pcrfonnance of inspection and/or analysis in good A Client: Denison Mines Lab Set ID: 1011479 Project: 4th Quarter Semi Annual Ground Water Sample ID Analyte 1011472-004AMS T etrahydrofuran 1011472-004AMS Surr: 1,2-Dichloroethane-d4 1011472-004AMS Surr: 4-Bromofluorobenzene 1011472-004AMS Surr: Dibromofluoromethane 1011472-004AMS Surr: Toluene-d8 1011479-002AMS Tetrahydrofuran 1011479-002AMS Surr: 1,2-Dichloroethane-d4 1011479-002AMS Surr: 4-Bromofluorobenzene 1011479-002AMS Surr: Dibromofluoromethane 1011479-002AMS Surr: Toluene-d8 AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 263-8686, Fax (801) 263-8687 e-mail: awal@awal.labs.com, web: www.awal-labs.com C SUMMARY REPORT Contact: Jo Ann Tischler Dept: MSVOA QCType: MS Amount Original Units Method Result Spiked Amount %REC Limits IlgiL SW8260C 26.9 20.00 0 135 43-146 %REC SW8260C 56.4 50.00 113 77-144 %REC SW8260C 49.8 50.00 99.6 80-123 %REC SW8260C 51.9 50.00 104 80-124 %REC SW8260C 48.0 50.00 95.9 80-125 11g/L SW8260C 20.0 20.00 0 99.8 43-146 %REC SW8260C 56.4 50.00 113 77-144 %REC SW8260C 49,1 50.00 98.3 80-123 %REC SW8260C 52.4 50.00 105 80-124 %REC SW8260C 47.8 50.00 95.6 80-125 Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limit Qual Date Analyzed 11127/20101727h 11127/2010 1727h 11127/2010 1727h 11/27/2010 1727h 11127/2010 1727h 11127/2010 1649h 1112712010 1649h 11127/2010 1649h 11127/2010 1649h 11127/2010 1649h Report Date: 12nt2010 Page 10 of21 All analyses applicable to the CWA, SOW A, and RCRA arc pcrfonncd in accordance to NELAe protocols. Pertinent sampling information is located on the attached COCo This report is provided for the exclusive usc of the addressee. Privllcgcs of subsequent usc of the name of this company or any member of its staff, or reproduction of thls report in connection with the advertisement, promotion or sale of any product or process, orin connection with the n:-publication of this report for any purpose other than for the addressee will be granted only on contact, This company accepts no responsibility except for the due pcrfonnance of inspection and/or analysis in good A Client: Denison Mines Lab Set ID: 1011479 Project: 4th Quarter Semi Annual Ground Water Sample ID Analyte 1011472-004AMSD Tetrahydrofuran 1011472-004AMSD SUIT: 1,2-Dichloroethane-d4 1011472-004AMSD Surr: 4-Bromofluorobenzene 1011472-004AMSD Surr: Dibromofluoromethane 1011472-004AMSD SUIT: Toluene-d8 1011479-002AMSD Tetrahydrofuran 1011479-002AMSD Surr: 1,2-Dichloroethane-d4 1011479-002AMSD Surr: 4-Bromofluorobenzene 1011479-002AMSD Surr: Dibromofluoromethane 1011479-002AMSD Surr: Toluene-dS AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 263-8686, Fax (801) 263-8687 e-mail: awal@awal-Iabs.com.web:www~awal-labs.com QC SUMMARY REPORT Contact: Jo Ann Tischler Dept: MSVOA QCType: MSD Amount Original Units Method Result Spiked Amount %REC Limits 11g/L SW8260C 24.9 20.00 0 124 43-146 %REC SW8260C 56.4 50.00 113 77-144 %REC SW8260C 48.8 50.00 97.5 80-123 %REC SW8260C 51.9 50.00 104 80-124 %REC SW8260C 47.2 50.00 94.4 80-125 11g/L SW8260C 25.3 20.00 0 127 43-146 %REC SW8260C 56.0 50.00 112 77-144 %REC SWS260C 49.2 50.00 98.3 SO-123 %REC SWS260C 52.2 50.00 104 SO-124 %REC SW8260C 47.S 50.00 95.5 SO-125 Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limit Qual 8.03 25 23.7 25 Date Analyzed 11/27/2010 1746h 11/27/2010 1746h 11/27/2010 1746h 11127/2010 1746h 11127/2010 1746h 11/27/2010 1708h 11127/2010 1708h 11127/2010 170Sh 11127/2010 170Sh 11127/2010 1708h Report Date: 121712010 Page 11 of21 All analyses applicable to the CWA, SDWA, and ReRA are pcrfonncd in accornancc to NELAC protocols. Pertinent sampling information is located on the attached COC, This report is provided for the exclusive usc of the addressee. Privileges ofsubscqucnt usc of the name of this company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection with the rc-publication of this report for any purpose other than for the addressee will be granted only on contact This company accepts DO responsibility except for the due performance of inspection and/or analysis in good Data Path Data File Acq On Operator Sample Mise ALS Vial Quanti tation Report C:\msdehem\1\DATA\NOVIO-C\27NOVIOA\ D25L4791 .D 27 Nov 2010 9 :33 pm 101l479-001A SAMP 5 .0ML 10F3 23 Sample Multiplier : 1 Quant Time: Nov 29 11 :30 :10 2010 Quan t Method C:\msdehem\I\METHODS\AFULLW_24 .M Quant Title VOA Calibration QLast Update Mon Nov 29 10 :10 :12 2010 Response via Initial Calibration (QT Reviewed) ! bundance ---TIC: D2SL4791 .D\dala.ms 1300000 1250000 1200000 i ~ 1150000 !:! ~ ~ 1100000 0 ~ 10S0000 .... '9 1000000 <Il. i .. 9S0000 900000 8S0000 i ~ ,g ~ jj c ~ .i. .... r ~ ~ ~ ~ E m ~ 15 g IJ) 800000 a: c !2i 750000 700000 6S00OO 600000 550000 500000 450000 400000 3S0000 300000 250000 200000 150000 100000 50000 0 lme-> 2.00 2.50 AFULLW_24.M Mon Nov 29 11:39:27 2010 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via Quantitation Report C:\msdehem\1\DATA\NOV10-C\27NOV10A\ D08L4792.D 27 Nov 2010 4:11 pm 1011479-002A SAMP 5.0ML 10F3 6 Sample Multiplier: 1 Nov 27 16:23:55 2010 C:\MSDCHEM\1\METHODS\AFULLW_24.M VOA Calibration Wed Nov 24 15:45:52 2010 Initial Calibration (QT Reviewed) ( bundance rIc: DOBL4792.0\data.ms- 1200000 1150000 1100000 1050000 1000000 950000 900000 850000 800000 750000 700000 650000 600000 550000 500000 450000 400000 350000 300000 250000 200000 150000 100000 50000 L1 o Ime-.::? __ , , , , 1 1 AFULLW_24.M Sat Nov 27 16:24:12 2010 C/) C/). or Q) iii c: .c '" .r: 'Iii 'Iii e E 0 e :2 0 .Y " Cl '5 E N. e t: ,Q " 0 C/) ~ C/) I f 1 c: Q) ~ ~ .Q .§ ~ .c .11 ~ Cl c: ":. 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Report Date: 121712!H@gipage43 of21 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via f bundance 1300000 1250000 1200000 1150000 1100000 1050000 1000000 950000 900000 850000 800000 750000 700000 650000 600000 550000 500000 450000 400000 350000 300000 250000 200000 150000 100000 50000 me--> Quantitation Report C:\msdehem\1\DATA\NOV10-C\27NOV10A\ D26L4793.D 27 Nov 2010 9:52 pm 101l479-003A SAMP 5.0ML 10F3 24 Sample Multiplier: 1 Nov 29 11:30:39 2010 C:\msdehem\1\METHODS\AFULLW_24.M VOA Calibration Mon Nov 29 10:10:12 2010 Initial Calibration (QT Reviewed) TIC: D26L4793.D\data.~ en en ~ ~ os i iJi E e 12 .t= 0 .Y :> 0 'a ~ E e t: ~ :> en ~ en AFULLW_24.M Mon Nov 29 11:39:59 2010 ~.OQJ.~o 10.00 10.50 11.00 11.50 Report Date: 12/712(fi~glPage14 of21 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via Quantitati on Report C:\msdehem\1\DATA\NOV10-C\27NOV10A\ D27L4794.D 27 Nov 2010 10:11 pm 1011479-004A SAMP 5.0ML 10F3 25 Sample Multiplier: 1 Nov 29 11:31:05 2010 C:\msdehem\1\METHODS\AFULLW_24.M VOA Calibration Mon Nov 29 10:10:12 2010 Initial Calibration (QT Revie wed ) e IAbundanc 1300000 -TIC: D27L4794~5\da-la.ms -- 1250000 ~ "0 1200000 ~ ~ .8 1150000 e .!l .s::: 1100000 1050000 () ~ 0 f Iii ~ ~ ~ rfJ .!l 1000000 950000 900000 of ii " Q) 0 N .... " .2l e ~ 0 " !!1 of 1i E " ,5 Q) ~ ~ t: " rfJ 850000 0 " II: 0 800000 !ii 750000 700000 650000 600000 550000 500000 rfJ 450000 ~ ~ .J!! .J!! 1ii 1;) E 400000 E 0 e iJ 0 is " '15 <4. E e ~ ,Q rfJ 0 350000 t: " 300000 rfJ 250000 200000 150000 100000 50000 _lL III il 2.00 2.50 3j(L .~ ~ 5,~0 MO~Q.~O 5.0IL _E!,QL .M O 7.00 7.50 B.OO _~&Q.. ~OO o AFULLW_24.M Mon Nov 29 11:40:32 2010 9.@ 10.00 10.50 11 .00 11.50 Report Date: 121712(ftOgtpage1S of21 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\DATA\NOV10-C\27NOV10A\ D05LCS20.D 27 Nov 2010 3:14 pm LCS VOC 112710A LCS SEE COVERSHEET FOR ID AND AMOUNTS 3 Sample Multiplier: 1 Quant Time: Nov 27 15:26:07 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_24.M Quant Title VOA Calibration QLast Update Wed Nov 24 15:45:52 2010 Response via Initial Calibration (Not Reviewed) ~undance TIC: D05LCS20.D\data.ms 2600000 2500000 2400000 2300000 2200000 21 2000000 1900000 1800000 1700000 1600000 1500000 "!. "l. co JI i -0 " " !!l ~ to E " .Ii C/) ~ ~il i!l " .. .8 1400000 1100000 !1 g u: Cl ~ " 1i! 'iii [;! AFULLW_24.M Sat Nov 27 16:55:52 2010 Report Date: 121712~@gqlage16 of21 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\DATA\NOV10-C\27NOV10A\ D07LMBLK.D 27 Nov 2010 3:52 pm MB VOC 112710A MBLK 5.0ML 5 Sample Multiplier: 1 Quant Time: Nov 27 16:37:36 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_24.M Quant Title VOA Calibration QLast Update Wed Nov 24 15:45:52 2010 Response via Initial Calibration -- (QT Reviewed) bundance TIC: 007LMBLK.D\data.ms 1200000 1150000 ..; 1100000 ~ <: 1050000 1000000 ~ ~ i . ~ :;: C/) .11 ~ 0 Q) ,j.o N 950000 <: 0 i II !ii e 0 ::I '5 E 900000 e OJ ~ ~ (/) 850000 <: Q) ~ II 800000 e 0 ::I a: 0 750000 !ii 700000 650000 600000 550000 500000 450000 C/) (/). " of <: <: '" '" .c:: 400000 .c:: "iii "iii e E .Q e -fi g 5 '8 No E 350000 e t: .g ::I 0 (/) t: 300000 al 250000 200000 150000 100000 50000 ime-·> j.. 3.50 4.00 4.50 5.00 6.00 6.50 2.00 2.50 3.00 5.50 7.00 7.50 8.00 8.50 9.00 o AFULLW_24.M Sat Nov 27 16:37:49 2010 -- I ..,.... 9.50 10.00 10.50 J..LQL1 1.!19 Report Date: 121712!R@gipage"17 of21 Quantitation Report C:\msdehem\1\DATA\NOV10-C\27NOV10A\ D12S4 724. D 27 Nov 2010 5:27 pm 1011472-004AMS Data Path Data File Aeq On Operator Sample Mise MS 5.0ML 20F5 ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via 10 Sample Multiplier: 1 Nov 27 17:39:09 2010 C:\MSDCHEM\1\METHODS\AFULLW_24.M VOA Calibration Wed Nov 24 15:45:52 2010 Initial Calibration (Not Reviewed) , bundance TIC: 012S472.tO\clata.ms 2000000 1900000 1800000 1700000 1600000 1 ~ .:: Il .:: 1500000 ~ E :!l 0 1400000 ~ 0 ~ 1300000 "!. <Xl V " .:: 1200000 " CIt " ~ " ! .:: I:: II 1100000 1000000 900000 " ?< I Cf) c. .. E rg i!l (a!! III ~ Itf " ~ 1l !? .. a iii .. If 1~ 0 800000 ~ ~ !! 700000 U{ i!l g 600000 ~ 500000 '" .:: 400000 300000 200000 100000 ~i i!l ~i ..i!l q ~ " 1 .:: ~~ ~ i" ~ -" ~v 1.1 ~ ,~ 0 0 1.1 -.11 j~ ~ "8 " -~~~ ! f w -8 ~ I ~ " !:! ~ I ~ ,,-" c~ -~ r .EN Q,.: co : z .c ~- O~~~n9~~~~~'~~~~~~~~~'I~I~~~·~;¥~~~~·~~~~~~~~~~~~~~~~~~TTT 2.00 2.50 3~3.50 4.00 4.50 5.00 5.50 6.00 6.qO 7.00 7.QQ ~,.Q9 I ime-> AFULLW_24.M Mon Nov 29 11:01:10 2010 Report Date: 121712(ftijgCPage480f21 Oata Path Oata File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\OATA\NOV10-C\27NOV10A\ 010S4792.0 27 Nov 2010 4:49 pm 1011479-002AMS MS 5.0ML 20F3 8 Sample Multiplier: 1 Quant Time: Nov 27 17:01:00 2010 Quant Method C:\MSOCHEM\1\METHODS\AFULLW_24.M Quant Title VOA Calibration QLast Update Wed Nov 24 15:45:52 2010 Response via Initial Calibration (Not Reviewed) TIC: 010S4792.0\dala.ms 2100000 2000000 1900000 1800000 E 1300000 1200000 AFULLW_24.M Sat Nov 27 17:02:02 2010 Report Date: 121712(ft@g~age49 of21 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via fA undance 1600000 1500000 1400000 1000000 900000 800000 700000 600000 500000 400000 200000 100000 Quantitation Report C:\msdehem\I\DATA\NOVI0-C\27NOVI0A\ D13D4 724. D 27 Nov 2010 5:46 pm 1011472-004AMSD MSD 5.0ML 30F5 11 Sample Multiplier: 1 Nov 27 17:58:03 2010 C:\MSDCHEM\I\METHODS\AFULLW_24.M VOA Calibration Wed Nov 24 15:45:52 2010 Initial Calibration (Not Reviewed) E O~~~~~~~~~~~~~~~~~~~~~·~MR~~~~rn~~~~~~~~~~~~~~~~~ ..!!!e-~ AFULLW_24.M Mon Nov 29 11:01:45 2010 Report Date: 121712(flagtpageiO of21 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\OATA\NOV10-C\27NOV10A\ 01104792.0 27 Nov 2010 5:08 pm 1011479-002AMSO MSO 5.0ML 30F3 9 Sample Multiplier: 1 Quant Time: Nov 27 17:20:04 2010 Quant Method C:\MSOCHEM\1\METHOOS\AFULLW_24.M Quant Title VOA Calibration QLast Update Wed Nov 24 15:45:52 2010 Response via Initial Calibration (Not Reviewed) undance--TIC: 011 04792. D\data. ms 2100000 2000000 1900000 1800000 1700000 1600000 1500000 1400000 en 1300000 1200000 i 1100000 1000000 900000 800000 700000 600000 500000 400000 300000 rr: <Ii c 200000 jl! 'iii E Ie .Q .c 0 AFULLW_24.M Mon Nov 29 11:00:35 2010 Report Date: 12/7/2(flOg~agei1 of21 American West Analytical Laboratories WORK ORDER Summary Work Order: 1011479 Client: Denison Mines Page 1 of 1 ClientID: DENIOO Contact: Jo Ann Tischler 11124/2010 Project: 4th Quarter Semi Annual Ground Water QCLevel: LEVEL III WOType: Project Comments: No Hard Copies (UL). QC 3 & Summary. EDD-CSV. Report THFto 11l+t~ SampleID Client Sample ID Collected Date Received Date DateDu~ Matrix Test Code Sel Storage 101l479-001A MW-3A 11122120109:40:00 AM 111241201010:40:00 AM 12110/2010 Aqueous 8260-W ~ VOCFridge 3 1011479-002A MW-20 1112212010 12:45:00 PM 12110/2010 8260-W ~ VOCFridge 1011479-003A MW-23 11/2212010 10:30:00 AM ]2110/2010 8260-W ~ VOCFridge 101l479-004A Trip Blank 11/2212010 12/10/2010 8260-W ~ VOCFridge 5. ( .. Sheet 1 of 1 < lut/If?; CHAIN OF CUSTODY Samples Shipped to: American West Analytical Lab 463 West 3600 South Salt Lake City, Ut 84115 Contact: Ryan Palmer or David Turk Ph: 435 678 2221 roalmer@denisonmines.com dturk@denisonmines.com Chain of Custody/Sampling Analysis Request Project 4th Quarter-Semiannual Groundwater Sample 10 MW3A MW20 MW23 Trip Blank Date Collected 11/22/2010 11/22/2010 11/22/2010 11/22/2010 Samplers Name Samplers Signature Tanner Holliday Time Collected Laboratory Analysis Requested 940 THF 1245 •.. THF 1030 THF THF , Please notify Ryan Palmer of Reciept tempature on these samples Immediatelyl Thank you. Relinquished fr(Signature) j aJW.I<-H( . Relinquished By:(Signature) Datemme Datemme D~lTime " .I ·//(0 ( ~ Lab Set ID: . I <Jj 1 'i 2 J Samples Were: CDC Tape Was: '. Containel~ Type: No. Rec. ~ ShiPped B.Jf: V1. p.s Present on Outer Pac}tage '&t\ W AL Supplied Plastic o Hand Delivered ~Yes ONe DNJA o A ~ Supplied Clear Glass o Ambient Unbroken on Outer pac),age o A WAL ~plied Amber Glass ~Chilled . A'Yes DNa ONJA . o A WAL su~~(ArrOCJTOX Vials t>'I-; f OL Ten}perature ,1 I DC Present on Sample o Amber 0 Clear eadspace 0 No Headspace Rec. BrokenILeaking I l1Yes ONe DN/A DYes DNa %N/A o Non A WAL SupplieiN;;",ontainer Notes: .;J.. 319 ~c;, 5' lee. ~ roke. ' . Unbroken on Sample Notes: ~ .:)Ci.. ""-1'1 Lc. V/'r...1 DYes DNa gfN/A . ~ Properly Preserved ~Yes DNa ONJA Notes: Notes: Rec. Within Hold AYes DNo Discrepancies Between Labels and CDC DYes NNo Notes: Notes: " '. . ' " I Bottle Type . Preservative . All pHs OK . Ammonia '-. pH <2 H2S04 .. . . .. COD ~S04 Cyanide PH> 12 NaOIf'----I Metals pH <2'HNOs ---.. . N02 &NOs . pH <2 H2S04 --r--- Nutrients . pH <2 H2S04 ---.' ' .' .. O&G pH <2HCL --~ Phenols " pH <2 H2S04 .~t-.. .. Sulfide pH> 9NaOH, ZnAC --...:: TKN pH <2 H2SO4 .. ~ TOe pH <2 HSP04 ' . '" TPQ>! pH <2 H2S04 i'... TPH pH<2HCL ........ I-... ............. ............ I "-I "'" I ~ .J_. _ .-M ____ 11 -.• _OL _~........ _1_:_ a.L.._ ......... _1_ I:." 2) Pour sample from' Lid gently over wide range pH paper 3) Do Not dip the pH paper in the sample bottle or lid . 4) If sample is not Preserved properly list its extension and receiving pH in the appropriate column above . 5) Flag coe and notify client for further instructions . 6) Place client conversation on coe 7) Samples may be adjusted at client request UPS Internet Shipping: Shipment Label 'IJPS Internet Shipping: ViewlPrint Label I .. , .... 'I. Pril)t the label(s): Select the Print button on the print dialog box that appears. Note: If your browser does not support this function select Print from the File menu to print the label. ~. Fold the printed label at the solid line below. Place the label in a UPS Shipping Pouch. If you do not have a pouch, affix the folded label using clear plastic shipping tape over the entire label. 3. GETTING YOUR SHIPMENT TO UPS Customers without a Daily Pickup . ~ . .., ......... . Schedule a same day or future day Pickup to have a UPS driver pickup all of your Internet Shipping packages. Hand the package to any UPS driver in your area. Take your package to any location of The UPS Store®, UPS Drop Box, UPS Customer Center, UPS Alliances (OHice Depot® or Staples®) or Authorized Shipping Outlet near you. Items sent via UPS Return ServicessM (including via Ground) are also accepted at Drop Boxes. To find the location nea~est you, please visit the 'Find Locations' Quick link at ups.com. Customers with a Daily Pickup Your driver will pickup your shipment(s) as usual. FOLD HERE ... ......... Page 1 of 1 https:/ /www.ups.comluis/create?ActionOrlginPair=print_Receipt&POPUP __ LEVEL=1...11/23/20 10 • A • Jo Ann Tischler Denison Mines 1050 17th Street, # 950 AMERICAN Denver, CO 80265 WEST TEL: (303) 389-4132 ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer RE: 4th Quarter-Semiannual Groundwater Dear Jo Ann Tischler: Lab Set ID: 1011504 American West Analytical Laboratories received 3 sample(s) on 11130/2010 for the analyses presented in the following report. All analyses were performed in accordance to The NELAC Institute protocols unless noted otherwise. American West Analytical Laboratories is certified by The NELAC Institute in Utah and Texas; and is state certified in Colorado and Idaho. Certification document is available upon request. If you have any questions or concerns regarding this report please feel free to call. The abbreviation "Surr" found in organic reports indicates a surrogate compound that is intentionally added by the laboratory to determine sample injection, extraction, andlor purging efficiency. The "Reporting Limit" found on the report is equivalent to the practical quantitaion limit (PQL). This is the minimum concentration that can be reported by the method referenced and the sample matrix. The reporting limit must not be confused with any regulatory limit. Analytical results are reported to three significant figures for quality control and calculation purposes. Thank You, Approved by: Digitally signed by Jose G. J 0 S e G ~~~~~=Jose G. Rocha. • o=American West Analytical Laboratories, ou=Quality Assurance Officer, Roc h a ~:~~=jose@aWal-labs.com, Date: 2010.12.09 08:45:51 -07'00' Laboratory Director or designee Report Date: 12/8/2010 Page 1 ofl1 All analyses applicable lo lhe CW /\. SDW/\. and RCRA arc performed in accordance lo NEL/\C prolocols. Pertinenl sampling informal ion is loealed on lhe allached CDC. This report is provided for lhe exclusive use oflhe addressee. Privileges of subsequent usc of lhe name of lhis company or any member of its staff; or reproduction of this reporl in connection with the advertisement, promotion or sale of any product or process, or in connection wit.h the r~-public~tion .of th~s .report. for a~y purpose other than for the addressee wi II be granted only on contacl. This company accepts no responsibility exccpl for the due performance of inspection andlor analysis in good faith A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Client: Project: Lab Set ID: Date Received: Lab Sample ID 1011504-001A I011504-002A 101lS04-003A SAMPLE SUMMARY Denison Mines Contact: Jo Ann Tischler 4th Quarter-Semiannual Groundwater 1011504 11130/2010 1005h Client Sample ID Date Collected Matrix Analysis MW-34R 11/26/2010 IOllh Aqueous VOA by GC/MS Method 8260CI5030C MW-34 11129/2010 0810h Aqueous VOA by GC/MS Method 8260CIS030C Trip Blank 11126/2010 Aqueous VOA by GC/MS Method 8260CI5030C Report Date: 12/8/2010 Page 2 of 17 All analyses applicable to the CW A, SDWA, and ReRA are perfonned in accordance to NELAC protocols. Perlinent sampling infonnation is located on the attached COCo This reporl is provided for the exclusive use of the addressee. Privileges of subsequent use of the name of this company or any member of its staff, or reproduction of this report in conncclion with the advertisement, promotion or sale of any product or process, or in connection with the re.:public~tion .of th~s.rcporl. for a.ny purpose other than for the addressee will be granted only on contact. This company accepts no responsibility excepL for the due performance of ins peel ion and/or analysis in good faith A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer • Volatile Case Narrative Client: Contact: Denison Mines Jo Ann Tischler Project: Lab SetID: Sample Receipt Information: Date of Receipt: Date(s) of Collection: Sample Condition: C-O-C Discrepancies: Method: Analysis: 4th Quarter-Semiannual Groundwater 1011504 11130/2010 11/26 & 11/29/2010 Intact None SW-846 8260C/5030C Tetrahydrofuran General Set Comments: Tetrahydrofuran was not observed above reporting limits. Holding Time and Preservation Requirements: All samples were received in appropriate containers and properly preserved. The analysis and preparation of all samples were performed within the method holding times following the methods stated on the analytical reports. Analytical QC Requirements: All instrument calibration and calibration check requirements were met. All internal standard recoveries met method criterion. Batch QC Requirements: MB, LCS, MS, MSD, RPD, and Surrogates: Method Blanks (MBs): No target analytes were detected above reporting limits, indicating that the procedure was free from contamination. Laboratory Control Sample (LCSs): All LCS recoveries were within control limits, indicating that the preparation and analysis were in control. Matrix Spike I Matrix Spike Duplicate (MS/MSD): All percent recoveries and RPDs (Relative Percent Differences) were inside established limits, indicating no apparent matrix interferences. Surrogates: All surrogate recoveries were within established limits. Corrective Action: None required. Report Date: 12/8/2010 Page 3 of 17 All analyses applicable to ill. CW A. SDWA. and RCM are performed in accordance La NELAC protocols. Pertinent sampling information is located on the attached CDC. This report is provided for the exclusive use of tbe addressee. Privileges of subsequent use of the name of this company or any member of its slatT, or reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection wil}t the re.:public~tion .of th~s .report .. for a~y 'pu~ose other than for the addressee will be granled only on contact. This company accepts no responsibility except for the due performance of inspection and/or analysis in good faith A Client: Denison Mines Lab Set ID: 10 11504 Project: 4th Quarter-Semiannual Groundwater Sample ID Analyte LCS VOC 113010A Tetrahydrofuran LCS VOC 11301 OA Surr: 1,2-Dichloroethane-d4 LCS VOC 1 130 lOA Surr: 4-Bromofluorobenzene LCS VOC 113010A Surr: Dibromofluoromethane LCS VOC 113010A Surr: Toluene-d8 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 263-8686, Fax (801) 263-8687 c-mail: awal@awal-Iabs~com. web: www.awal-Iabs.com C SUMMARY REPORT Contact: Dept: Jo Ann Tischler MSVOA QC Type: LCS Amount Original Units Method Result Spiked Amount %REC Limits Jlg/L SW8260C 16.1 20.00 0 80.4 43-146 %REC SW8260C 54.8 50.00 110 69-132 %REC SW8260C 48.3 50.00 96.6 85-118 %REC SW8260C 52.5 50.00 105 80-120 %REC SW8260C 47.6 50.00 95.2 81-120 Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limi Qual Date Analyzed 11/30/2010 1205h 11130/2010 1205h 11130/2010 1205h 11/30/2010 120511. 11130/2010 1205h • • Report Date: 12/8/2010 Page 7 of17 All analyses applicable to the CWA, SDWA, and RCRA are performed in accordance to NELAC protocols. Pertinent sampling infonnation is located on the attached CDC This report is provided for the exclusive usc ofthc addressee. Privileges of subsequent usc afthc name aftbis company or any member of its staff, aT reprodUCLion of this report in connection with the advertisement, promotion or sale of any product or process, or in connection with the re-publication of this report for any purpose other than for the addressee win be granted only on contact. This company accepts no responsibility except for the due performance of inspection and/or analysis in good A Client: Denison Mines Lab Set ID: 1011504 Project: 4th Quarter-Semiannual Groundwater Sa~ple ID Analyte MB VOC 113010A Tetrahydrofuran MB VOC 113010A SUIT: 1,2-Dichloroethane-d4 MB VOC 113010A SUIT: 4-Bromofluorobenzene MB VOC 113010A SUIT: Dibromofluoromethane MB VOC 113010A SUIT: Toluene-d8 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Units Ilg/L %REC %REC %REC %REC Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 263-8686, Fax (801) 263-8687 e-mail: awal@awal-labs.com, web: www.awal-labs.com C SUMMARY REPORT Contact: Jo Ann Tischler MSVOA MBLK Dept: QC Type: Amount Original Method Result Spiked Amount %REC Limits SW8260C < l.00 SW8260C 56.2 50.00 112 69-132 SW8260C 52.5 50.00 105 85-118 SW8260C 52.4 50.00 105 80-120 SW8260C 49.2 50.00 98.4 81-120 Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limi Qual Date Analyzed 11130/2010 1243h 11/30/2010 1243h 11/30/201 0 1243h 11/30/2010 1243h 11/30/2010 1243h Report Date: 12/8/2010 Page 8 ofl? AU analyses applicable to the CWA, SDWA, and RCRA arc performed in accordance to NELAC protocols Pertinent sampling information is located on the attached COC, This report is provided for the exclusive usc of the addrcsscc_ Privileges or subsequent usc of the name ofthis company or any member of its staff, or reproduction oftl1i5 report in connection with the advertisement, promotion or sale ofany product or process, or in connection with the rc-publication of this report for any purpose other than for the addressee will be grantcdonly on contact This company accepts no responsibility except for the due performance of inspection and/or analysis in good A Client: Denison Mines Lab Set ID: 1011504 Project: 4th Quarter-Semiannual Groundwater Sample ID Analyte 1011S04-001AMS Tetrahydrofuran 1011S04-001AMS SUIT: 1,2-Dichloroethane-d4 1011S04-001AMS SUIT: 4-Bromofluorobenzene 1011S04-001AMS SUIT: Dibromofluoromethane 1011S04-001AMS SUIT: Toluene-d8 AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 263-8686, Pax (801) 263-8687 e-mail: awal@awal-Iabs.com, web: www.awal-labs.com C SUMMARY REPORT Contact: Dept: Jo Ann Tischler MSVOA QC Type: MS Amount Original Units Method Result Spiked Amount %REC Limits J.1g1L SW8260C 22.1 20.00 0 110 43-146 %REC SW8260C S6.9 SO.OO 114 77-144 %REC SW8260C 49.1 SO.OO 98.2 80-123 %REC SW8260C S2.2 SO.OO 104 80-124 %REC SW8260C 47.6 SO.OO 9S.3 80-12S Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limi Qual Date Analyzed 11/30/2010 1847h 11/30/2010 1847h 11130/2010 1847h 11130/2010 1847h 11130/2010 1847h 4- Report Date: 12/8/2010 Page 9 ofl7 An analyses applicable to the CWA, SDWA, and RCRA arc performed in accordance Lo NELAC protocols. Pertinent sampllng information is located on the attached CDC, This report is provided for the exclusive use of the addressee. Privileges of subsequent usc of the name ofthis company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection with the re-publieation of this report for any purpose other than for the addressee will bc grantcd only on contact. This company accepts no responsibility except for the due performance of inspection and/or analysis in good A Client: Denison Mines Lab Set ID: 1011504 Project: 4th Quarter-Semiannual Groundwater Sample ID Analyte 1011S04-001AMSD Tetrahydrofuran 1011S04-001AMSD SUIT: 1,2-Dichloroethane-d4 I011S04-00IAMSD SUIT: 4-Bromofluorobenzene 1011S04-001AMSD SUIT: Dibromofluoromethane 1011S04-001AMSD SUIT: Toluene-d8 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 263-8686, Fax (801) 263-8687 e-mail: awal@awaJ.labs.com, web: www.awal-Iabs_com C SUMMARY REPORT Contact: Dept: Jo Ann Tischler MSVOA QCType: MSD Amount Original Units Method Result Spiked Amount %REC Limits Ilg/L SW8260C 22.1 20.00 0 111 43-146 %REC SW8260C S6.9 SO.OO 114 77-144 %REC SW8260C 48.4 SO.OO 96.7 80-123 %REC SW8260C S2.5 SO.OO lOS 80-124 %REC SW8260C 47.2 SO.OO 94.3 80-12S Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limi Qual 0 2S Date Analyzed 11/30/2010 IS1Sh 11130/20101S1Sh 11130/2010 IS1Sh 11130/20;0 ISISh 11/30/2010 IS1Sh Report Date: 12/8/2010 Page 10 of17 All analyses applicable to the CWA, SOW A, and RCRA arc pcrfonncd in accordance to NELAe protocols. Pertinent sampling infonnation is located on the attached COCo This report is provided forthc exclusive usc of the addressee. Privileges of subsequent usc of the name of this company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection with the re-publication of this report for any purpose other than for the addressee will be granted only on contact. This company accepts no responsibility except for the due perfoTTIlanee of inspection and/or analysis in good Data Path Data File Acq On Operator Sample Mise ALS Vial • Quanti tation Report C:\msdehem\1\DATA\NOV10-C\30NOV10A\ D62L5041.D 30 Nov 2010 1:59 pm 101l504-001A SAMP 5.0ML 10F3 9 Sample Multiplier: 1 Quant Time: Nov 30 14:18:15 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_24.M Quant Title VOA Calibration QLast Update Mon Nov 29 10:10:12 2010 Response via Initial Calibration (QT Reviewe d> I -TIC: D62L5041 .D\data.ms e 1350000 1300000 1250000 1200000 1150000 1100000 1050000 1000000 950000 900000 850000 800000 750000 700000 650000 600000 550000 500000 450000 400000 350000 300000 250000 200000 150000 100000 50000 J. o J~.:.-> __ 2.00 2.50 3:QL3"§.0 4.Q() /jJ <II 1 j a W E Q ~ ~ 0 "6 E N_ e '3 .!l 0 '" $ '" .t 4.~0-.2:00 AFULLW_23.M Tue Nov 30 14:18:42 2010 .,; " i -8 ~ ~ -=-0 t! § 21 . j e ~ ~ a ~ c: 0 ~ !!i cD g ~ 'a E c: e .8 GI e :; g '" u:: § ~ "" ~ 5.50 6.bo 61;0 -1.00 7.~8.00 8.50 9.00 9.50 10~00 10:50 11 .00 11 :50 Report Date: _12/8/2ijfU1EF'tlg~11 oft7 Quanti tation Report (QT Revie\>/ed) Data Path Data File , Aeq On Operator Sample Mise ALS Vial C :\msdehem\1\DATA\NOV10-C\30NOV10A\ D63L5042.D 30 Nov 2010 2 :18 pm 1011504-002A SAMP 5.0ML 10F3 10 Sample Multiplier: 1 Quant Time: Nov 30 14 :49 :31 2010 Quant Method C:\MSDCHEM\1\METHODS\AFOLLW_24 .M Quant Title VOA Calibration QLast Update Mon Nov 29 10:10:12 2010 Response via Initial Calibration TIC: Ds3L5042.""bTctata.ms 1400000 1350000 1300000 1250000 1200000 1150000 1100000 1050000 1000000 950000 900000 850000 800000 750000 700000 650000 600000 550000 500000 450000 400000 350000 300000 250000 200000 150000 100000 <Il "l j " ~ t; '8 E ~ e g .S! ~ 0 E "t e Gl ;; 0 <h ;; <h 18 ~ ~ r:: ~ ,Sl & () ~ I • t ~ i g Ii: 0 !ii 50000 o -A ~ ~d AFULLW_23.M Tue Nov 30 14:49:40 2010 ~ ! '" E! "l j .~ s: .w .8 q .... B ~ ~ a E <> ro t: .jj Report Date: 12(,8/211roJEl"age112of17 Data Path Data File Aoq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\DATA\NOV10-C\30NOV10A\ D64L5043 .D 30 Nov 2010 2 :37 pm 101l504-003A SAMP 5.0ML lOF3 11 Sample Multiplier: 1 Quant Time: Nov 30 14:51:09 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_24.M Quant Title VOA Calibration QLast Update Mon Nov 29 10:10:12 2010 Response via Initial Calibr ation (QT Reviewed) u ndance TIC: D64L5043.D\data.ms 300000 250000 200000 150000 ~ ~ ! I!! .. " ~ 100000 :! ., , J 1 ~ ~ 050000 m ~ 0 ~ ~ r 000000 0 ~ os ~ 950000 d e ! ttl ~ 900000 <0 0 If 850000 0 ~ 800000 750000 700000 650000 600000 550000 '" '" 500000 8 ~ :! ~ ~ ~ 450000 e 1i2 g :6 c 0 400000 ~ ~ E j 0 350000 S <0 300000 250000 200000 150000 100000 50000 0 J.. " ~ A e-> 2.0Q_~.5.0 3.bo 3.50 4.bL 4.qo~QL~§!L f?00 9:59_ 7·!LCLL~°--M.9 8.50 m AFULLW_23.M Tue Nov 30 14:51:36 2010 --- 910 9.10 10~00 10~50 11 .00 11 .~ Report Date: 12/8/~lUJEftgt113 of 17 Data Path Data File Ae~ On Operator Sample Mise ALS Vial • Quantitation Report C:\msdehem\1\DATA\NOV10-C\30NOV10A\ D565LCS20.D 30 Nov 2010 12:05 pm LCS VOC 113010A LCS SEE COVERSHEET FOR ID AND AMOUNTS 3 Sample Multiplier: 1 Quant Time: Nov 30 12:17:51 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_24.M Quant Title VOA Calibration QLast Update Mon Nov 29 10:10:12 2010 Response via Initial Calibration (Not Reviewed) TIC: D565LCS20.D\dala.ms 800000 700000 600000 500000 ~ ~~ 400000 ~ ~ ;;;;~ 300000 ~ ~ ~~ AFULLW_23.M Tue Nov 30 13:24:31 2010 I Data Path Data File Acq @n Operator Sample Mise ALS Vial • Quantitati on Report C :\msdehem\l\DATA\NOV10-C\30NOV10A\ DS8LMBLK .D 30 Nov 2010 12 :43 p m MB VOC 11301011. MBLK 5 . OML 5 Samp~e Multiplier : 1 Quant Time : Nov 30 13 :40:54 2010 Quant Method C:\MSDCHEM\1\METHODS\AFOLLW_24.M Quant Tltle VOA Calibration QLast Update Mon Nov 29 10 :10 :12 2010 Response via Init ial Cal ibration (QT Reviewed) lwundance TIC: D58LMBLK.O\data.ms 1500000 .,; 'C 1400000 ~ 1! I" .2 .c (.) ;g ~ ~ ~ g iii 1300000 " f 0 "l ii 1200000 .2 c ~ ..t. .8 0 e Iii f ~ ~ ~ " " i is to " ~ VI 1100000 1000000 ~ 900000 800000 700000 III VI g '" 2 ~ ~ E I" .2 .c 600000 500000 ~ .11 0 " ~ E ~ ~ c " 0 VI ~ 400000 300000 200000 100000 A I I I L T I T AFULLW_23.M Tue Nov 30 13:41:05 2010 • , I T I Report Date: 12/812~m:l~ge415 of 17 Data Path Data File Aeq On 4 Operator Sample Mise ALS Vial Quant Time: ~uantitation Report C:\msdehem\1\DATA\NOVIO-C\30NOVIOA\ D77S5071.D 30 Nov 2010 6:47 pm 1011507-001AMS MS 5.0ML 20F3 24 Sample Multiplier: 1 Nov 30 18:59:10 2010 C:\MSDCHEM\1\METHODS\AFULLW_24.M VOA Calibration Quant Method Quant Title QLast Update Response via Mon Nov 29 10:10:12 2010 Initial Calibration (Not Reviewed) -TIC: D77S5071.D\data.ms 2100000 2000000 1900000 1800000 1700000 1600000 1500000 1400000 1300000 1100000 1000000 900000 700000 600000 500000 400000 m~ AFULLW_24.M Wed Dec 01 11:42:17 2010 Report Date: 12/8/2ijfU1EP'eg#16 of 17 Data Path Data File Aeq On , Operator Sample Mise ALS Vial Q~ntitation Report C:\msdehem\1\DATA\NOV10-C\30NOV10A\ D66D5071. D 30 Nov 2010 3:15 pm 1011504-001AMSD MSD 5.0ML 30F3 13 Sample Multiplier: 1 Quant Time: Nov 30 15:27:25 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_24.M Quant Title VOA Calibration QLast Update Mon Nov 29 10:10:12 2010 Response via Initial Calibration (Not Reviewed) TIC: D66D5071.D\data.ms 21 1900000 1700000 1600000 1500000 1100000 1000000 BOOOOO 700000 600000 500000 400000 300000 AFULLW_23.M Tue Nov 30 15:49:58 2010 ~ ~ c: Ol .0 ~ Ole co. Q) 0 ~.!a I> Report Date: 12/8/2ijro1E¥tige1170f17 American West Analytical Laboratories WORK ORDER Summary Client: Denison Mines Client ID: DEN 1 00 Contact: Project: 4th Quarter-Semiannual Groundwater QC Level: Jo Ann TiscWer LEVELIIl Work Order: 1011504 Page 1 of 1 11 130/2010 WOType: Project Comments: No Hard Copies (UL). QC 3 & Summary. EDD-CSV. Report THFto 1 ILg/L.; \It-l bt> SampleID Client Sample ID Collected Date Received Date Date Due Matrix Test Code Sel Storage 10JI504-001A MW-34R JlI2612010 10:11 :00 AM 11/301201010:05:00M11211412010 Aqueous 8260-W ~ VOCFtidge 3 LOllSQ4-OO1A MW-14 11129/2010 8:tO:OO AM 12/1412010 8260-W ~ VOCFridge 10115(l4..003A TripBlallk 1112612010 1211412010 8260-W ~ VOCFridge Sheet 1 of 1 CHAIN OF CUSTODY Samples Shipped to: American West Analytical Lab 463 West 3600 South Contact: Ryan Palmer or David Turk Ph: 435 678 2221 Salt Lake City, Ut 84115 rpalmer@denisonmines.com dturk@denisonmihes.com Chain of Custody/Sampling Analysis Request Project 4th Quarter-Semiannual Groundwater Sample 10 MW34R MW-34 Trip Blank Date Collected 11/26/2010 11/29/2010 11/26/2010 Samplers Name Samplers Signature Tanner Holliday Time Collected Laboratory Analysis Requested 1011 THF 810 THF THF \/ Please notify Ryan Palmer of Reciept tempature on these samples Immediately! Thank you. Relinquished By:(Signature) Date/Time Received By:(Signature) 11/29/2010 1000 DatefTime Received By:(Signature) \" DatefTlme Lab Set ill' /f'lLl0>4-• c> 1"0 Saqtples Were: COC Tape Was: Container Type: IY'Sbipped By: It\.\(S Present on Outer Pacimge o A WAL Su~ied Plastic o Hand Delivered wV'es 0 No 0 N/A o A WAL Supplied Clear Glass /'" o Al)lbient un~en on Outer package o A WAL Supplied Amber Glass ~ rn-Ch ill ed es ONo DN/A Temperature 3 .3 °C presen~mple o AWAL Supplied VOA~%;als o Amber D Clear 0 Heads 0 No Head~ace Rec. BrokenILeaking DYes gNo DN/A . DYes 0 DN/A D Non A WAL SUpplie9.eOntainer Notes: "Unbroi(en on sa:;r}'e v · / DYes ONo IA Properly Preserved [if Yes ONo DN/A Notes: Notes: / Rec. Within Hold ~Yes ONo Discrepal1cies Between Labels and COC I Notes: Notes; I '\)h , I " . Bottle Type Preservative . All pHs OK ......V Ammonia pH <2 H2S04 /'" COD pH <2 H2S04 /. . Cyanide PH>12NaOH " . V Metals pH <2HN03 .. . " /'" N02 & N03 pH<2H2S04 • ...... V Nutrients pH <2 H1S04 /' O&G pH <2 HCL ...... v Phenols pH <2H2SO.j /" . Sulfide pH> 9NaOH, ZnAC . ./ ./ TKN pH <2 HZS04 / TOC pH <2 H3P04 V TPO~ pH <2 H2SO4 . / .. TPH pH <2HCL V / .. / / (' ---'--- Procedure: 1) 2) 3) 4) 5) .6) 7) Pour a small amount of sample In tne sample lid Pour sample from Lid gently over wide range pH paper Do Not dip the pH paper in the sample bottle or lid . If sample is not· preserved properly list its extension and rec~iving pH in the appropriate column above Flag COC and notify client for further instructions Place client conversation on COC Samples may be adjusted at dient request '-...". ./ No.;tec. /'" / DYes ffNo . . ' . . "- A Jo Ann Tischler Denison Mines 1050 17th Street, # 950 AMERICAN Denver, CO 80265 WEST TEL: (303) 389-4132 ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director RE: 4th Quarter-Semiannual Groundwater Dear Jo Ann Tischler: Lab Set ID: 1012066 American West Analytical Laboratories received 2 sample(s) on 12/3/2010 for the analyses presented in the following report. All analyses were performed in accordance to The NELAC Institute protocols unless noted otherwise. American West Analytical Laboratories is certified by The NELAC Institute in Utah and Texas; and is state certified in Colorado and Idaho. Certification document is available upon request. If you have any questions or concerns regarding this report please feel free to call. The abbreviation "Surr" found in organic reports indicates a surrogate compound that is intentionally added by the laboratory to determine sample injection, extraction, and/or purging efficiency. The "Reporting Limit" found on the report is equivalent to the practical quantitaion limit (PQL). This is the minimum concentration that can be reported by the method referenced and the sample matrix. The reporting limit must not be confused with any regulatory limit. Analytical results are reported to three significant figures for quality control and calculation purposes. Jose Rocha Thank You, QA Officer Ky I e F. Digitally signed by Kyle F. Gross ON: cn=Kyle F. Gross, o=AWAL, ou=AWAL, email=kyle@awal- G labs com, c=US r 0 S S Dal.: 2010 12 1409:28:20 -07'00' Approved by: Laboratory Director or designee Report Date: 12114/2010 Page 1 of15 All analyses applicable to the CWA, SDWA. and ReRA are performed in accordance to NELAC protocols. P'ertinent sampling information is located on the attached cac. This report is provided fortbe exclusive use oftbe addressee. Privileges or subsequent use of the name of this company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection with the re-publication of this report fOT any purpose otber than for the addressee will be granted only on contact. This company accepts no responsibility except for the due perfonnancc of inspection andlor analysis in good faith amI according to the rules of the trade and ofscicnce~ A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Sail Lakc City UT 84115 (80 I) 263-86 6 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Cljent: Project: Lab Set ID: Date Received: Lab Sample ID IOJ2066·001A 1012066·002A SAMPLE SUMMARY Denison Mines Contact: Jo Ann Tischler 4th Quarter~Semiannual Groundwater 1012066 1213/2010 1000h Client Sample ID Date Collected Matrix Analysis MW-35 12/1/2010 0840h Aqueous VOA by GC/MS Method 8260C/5030C Trip Blank 12/1/2010 Aqueous VOA by GC/MS Method 8260C/5030C RcportDIlIC: 1211412010 l'agc2orl5 AII.""I~'" .pplh:llble '0 ,ho elVA, SDWA, .lId RCRA ore pctronncd h,.coolda.c" '0 ELAC pro'ocol •. Pertl,,"t .. mpllllll I"Com!>t,on i,loeal.d 011 'he att •• hed cae. Thi. report is plovided ror thccxcl .. iv. UK oflh. olJdrc.sscu. Privileges ur fub:R"quc:nI IISC oflhc nunte or.his co",pllny or JlD,y mcmbtr criu: StAlT, or rcprodm::lion oflhl$ n:pDr1 in c;.onOf,,;c:lion wirh fhl:' ndvcrilscmmll. promotion or $lIe orl\ny produt:( or procc$$, or In connection wllh Ihe r.·publico'ioll of ,hi, rcpol1 ( .. any pUI]lOSC olhollM" fOI the .dd="", will be s",n'od only un Will..". This comp,ny .""elll' no msponsiblli'y aCC'J11 rar Lbo due )1Ctfonn,nec: of itUJ'C"lian .. dlor analysi. In good folth ttntl 8ecUJdin~ te) the nlle:s ,,(the: trode and of:ccletl~. A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Volatile Case Narrative Client: Contact: Denison Mines Jo Ann Tischler Project: Lab SetID: Sample Receipt Information: Date of Receipt: Date(s) of Collection: Sample Condition: C-O-C Discrepancies: Method: Analysis: 4th Quarter-Semiannual Groundwater 1012066 12/3/2010 12/1/2010 Intact None SW-846 8260C/S030C Tetrahydrofuran General Set Comments: Tetrahydrofuran was not observed above reporting limits. Holding Time and Preservation Requirements: All samples were received in appropriate containers and properly preserved. The analysis and preparation of all samples were performed within the method holding times following the methods stated on the analytical reports. Analytical QC Requirements: All instrument calibration and calibration check requirements were met. All internal standard recoveries met method criterion. Batch QC Requirements: MB, LCS, MS, MSD, RPD, and Surrogates: Method Blanks (MBs): No target analytes were detected above reporting limits, indicating that the procedure was free from contamination. Laboratory Control Sample (LCSs): All LCS recoveries were within control limits, indicating that the preparation and analysis were in control. Matrix Spike / Matrix Spike Duplicate (MSIMSD): All percent recoveries and RPDs (Relative Percent Differences) were inside established limits, indicating no apparent matrix interferences. Surrogates: All surrogate recoveries were within established limits. Corrective Action: None required. Report Date: 12/14/2010 Page 3 of15 All analyses applicable to the CWA, SDWA, and RCRA are performed in accordance to NELAC protocols. Pertinent sampling information is located on the attached cae, This report is provided for the exclusive use of the addressee. Privileges of subsequent usc of the name oftrus company or any member of its staff, orreprodul::tion of this report in connel::tion with the advertisement, promotion or sale of any produl::t or process, or in connection with the re-publication of this report for any purpose other than for the addressee will be granted only on cootal::t. This company accepts no responsibility except for the due perfonnance of inspection andlor analysis in good faith and according to the rules of the trade and of science. A Client: Denison Mines Lab Set ID: 1012066 Project: 4th Quarter-Semiannual Groundwater Sample ID Analyte LCS VOC 1203108 Tetrahydrofuran LCS VOC 1203108 SUIT: 1,2-Dich1oroethane-d4 LCS VOC 1203108 SUIT: 4-8romofluorobenzene LCS VOC 1203108 SUIT: Dibromofluoromethane LCS VOC 1203108 SUIT: Toluene-d8 AMERICAN WEST ANAL YTICAL LABORATORIES 463 West 3600 South Units ~g/L %REC %REC %REC %REC Salt Lake City, UT 84115 (801) 263-8686. Toll Free (888) 263-8686. Fax (801) 263-8687 e-mail: awal@awal-Iabs,com, web: www.awal-Iabscom QC SUMMARY REPORT Contact: Jo Ann Tischler MSVOA Dept: QC Type: LCS Amount Original Method Result Spiked Amount %REC Limits SW8260C 14.6 20.00 0 72.8 43-146 SW8260C 53.2 50.00 106 69-132 SW8260C 49.2 50.00 98.3 85-118 SW8260C 51.4 50.00 103 80-120 SW8260C 48.1 50.00 96.2 81-120 Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limi Qual Date Analyzed 12/3/2010 1834h 12/3/2010 1834h 12/3/2010 1834h 12/3/2010 1834h 1213/2010 1834h Report Date: 12114/2010 Page 6 of 15 All analyses applicable to the CWA. SDWA, and RCRA are perfonned in accordam:e 10 NELAC prolocols. Pertinent sampling information is local.ed on the attached COC, This report. is provided for the exclusive use of the addressee Privileges of subsequent usc of the name of this company or any member of its staff, or reproduction of this repon in connection with the advertisement, promotion or sale of any prodUCl or process, or in connection with Lhe fe-publication of this report for any purpose other than for the addressee will be gramed only on contact. This company accep1.S no responsibility except for the due performance of inspeclion andlor analysis in good faith and according lo the rules oftbe Irade and ofsciencc. A Client: Denison Mines Lab Set ID: 1012066 Project: 4th Quarter-Semiannual Groundwater Sample ID Analyte MB VOC 120310B Tetrahydrofuran MB VOC 120310B Surr: 1,2-Dichloroethane-d4 MB VOC 120310B Surr: 4-Bromofluorobenzene MB VOC 120310B Surr: Dibromofluoromethane MB VOC 120310B Surr: Toluene-dS AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Units Ilg/L %REC %REC %REC %REC Salt Lake City, UT 84115 (801) 263-8686, ToJl Free (888) 263-8686, Fax (801) 263-8687 e-mail: awal@awal-Iabs.com, web: www.awal-Iabs.com QC SUMMARY REPORT Contact: Jo Ann Tischler MSVOA MBLK Dept: QC Type: Amount Original Method Result Spiked Amount %REC Limits SWS260C < 1.00 SWS260C 56.S 50.00 114 69-132 SWS260C 53.2 50.00 106 S5-11S SWS260C 52.0 50.00 104 SO-120 SWS260C 49.1 50.00 9S.1 SI-120 Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limi Qual Date Analyzed 12/3/2010 1917h 12/3/2010 1917h 12/3/2010 1917h 12/3/2010 1917h 12/3/2010 1917h Report Date: 12114/2010 Page 7 of 15 AU analyses applicable to Ute CWA, SDWA, and RCRA are performed in accordance to l\'ELAC protocols. Perunent sampling information is located on !he attached coe This report is provided for the exclusive use of the addressee. Privileges of subsequent usc cftbe name of this company or any member of its s1aff, or reproduction of this report in connection wilh the advertisement, promotion or sale of any product or process, or in connection with the re-publication of\his repan for any purpose other than for the addressee will be granted only on contact. This company accepts no respomibility except for the due performance of inspection andlor ana1ysis in good faith and according to the rules of the trade and of science, A Client: Denison Mines Lab Set ID: 10 12066 Project: 4th Quarter-Semiannual Groundwater Sample ID Analyte 1012066-001AMS Tetrahydrofuran 1012066-001AMS SUIT: 1,2-Dichloroethane-d4 1012066-001AMS SUIT: 4-Bromofluorobenzene 1012066-001AMS SUIT: Dibromofluoromethane 1012066-001AMS SUIT: Toluene-dS AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 26H686, Fax (801) 263-8687 e-mail: awal@awal-labs.com. web: www.awal-Iabscom QC SUMMARY REPORT Contact: Jo Ann Tischler Dept: MSVOA QC Type: MS Amount Original Units Method Result Spiked Amount %REC Limits ~g/L SWS260C IS.6 20.00 0 93.1 43-146 %REC SWS260C 57.S 50.00 116 77-144 %REC SWS260C 4S.5 50.00 97.1 SO-123 %REC SWS260C 53.6 50.00 107 SO-124 %REC SWS260C 46.4 50.00 92.7 SO-125 Kyle F_ Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limi Qual Date Analyzed 12/4/2010 0002h 12/4/2010 0002h 12/4/2010 0002h 12/4/2010 0002h 12/4/2010 0002h Report Date: 12114/2010 Page 8 of15 All analyses applicable to the CWA, SDWA. and RCRA are perfannc:d in accordance to NELAC protocols. Pertinent sampling infarmalion is located on the attached COCo This report is provided for the exclusive use of lhe addressee. Privileges of subsequenL use of the name of this company or any member of its staff, or reproduction afmis report in connection with the advertisement, promolion OT sale of any product or process, or in connection with the re-publicaLion of this report for any purpose other than for the addressee will be granted only on contact, This company accep1s no responsibility ellcept for the due performance of inspection and/or analysis in good faith and accordlng to the rules of the trade and of science, A Client: Denison Mines Lab Set ID: 1012066 Project: 4th Quarter-Semiannual Groundwater Sample ID Analyte 1012066-001AMSD Tetrahydrofuran 1012066-001AMSD SUIT: 1,2-Dichloroethane-d4 1012066-001AMSD SUIT: 4-Bromofluorobenzene 1012066-001AMSD SUIT: Dibromofluoromethane 1012066-001AMSD SUIT: Toluene-d8 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 263-8686, Fax (801) 263-8687 e-mail: awal@awal-labs.com, web: www.awal-labs.com QC SUMMARY REPORT Contact: Dept: Jo Ann Tischler MSVOA QC Type: MSD Amount Original Units Method Result Spiked Amount %REC Limits IlgiL SW8260C 17.8 20,00 0 89,2 43-146 %REC SW8260C 57.4 50.00 115 77-144 %REC SW8260C 49.3 50.00 98.6 80-123 %REC SW8260C 53.0 50.00 106 80-124 %REC SW8260C 47.0 50.00 93.9 80-125 Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limi Qual 4.22 25 Date Analyzed 12/4/2010 0021h 12/4/2010 0021h 12/4/2010 0021h 12/4/2010 0021h 12/4/2010 0021h Report Date: 12114/2010 Page 9 of 15 AU analyses applicable to the CWA, SDWA, and ReRA are performed in accordance 10 NELAC protocols, Pertinent sampling information is lOcated on the attached COC, This report is provided fOT the exclusive use oftbe addressee. Privileges of subsequent use of the name afmis company or any member of i15 staff. OT reproduction of this repon in connecLion with the advertisement, promotion or sale of any producl or process, or in connection with the re-publica1ion of this repOrt for any purpose other than for me addressee will be granted ooly on contacL This company accepts no responsibility e){cept fOf the due performance of inspeclion andlor analysis in good faith and according 10 the rules of tile trade and of science. Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\DATA\DECIO-C\03DECIOA\ F39L0661.D 3 Dee 2010 11:43 pm 1012066-001A SAMP 5.0ML lOF3 17 Sample Multiplier: 1 Quant Time: Dee 04 13:22:16 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_24.M Quant Title VOA Calibration QLast Update Mon Nov 29 10:10:12 2010 Response via Initial Calibration (QT Reviewed) Abundance TIC: F39L0661.Dldata,ms 1350000 1300000 1250000 1200000 1150000 110000.0 105000.0 10000'00 950000 900000 850000 800000 750000 700000 650000 600000 550000 500000 450000 400000 350000 300000 250000 200000 150000 100000 50000 .A. <IJ .; i E e g 15 E e -" is 1= " en 0 T!1Tl~-.> 2,09 2,50 3.00 _3 .. ~_ ..1.0.0 4.50 5.00-2:~.9~:..QL§.~O-Z..9.Q L5<1 §.90 ~~O ~.QO 9,50 10~00 10~50 11,00 11.50 I AFULLW_24.M Sat Dee 04 13:24:19 2010 Report Date: 12/14/2ti'fUJEVage'lIO of15 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via Abundance 1350000 1300000 1250000 1200000 1150000 1100000 1050000 1000000 950000 900000 850000 800000 750000 700000 650000 600000 550000 500000 450000 400000 350000 300000 250000 200000 150000 100000 50000 Quan titation Report C:\msdehem\1\DATA\DEC10-C\03DECI0A\ F42L0662 .D 4 Dee 2010 12 :40 am 1012066-002A SAMP 5.0ML lOF3 19 Sample Multiplier: 1 Dec 04 18 :24 :57 2010 C:\MSDCHEM\1\METHODS\AFULLW_24 .M VOA Calibration Mon Nov 29 10:10:12 2010 Initial Calibration (QT Reviewed) TIC; F42L0662.0\dala.ms ~ ~ ~ j ~ a ! c Iii j (J) 0 I g ~ ~ ~ 8 ~ E e <II ~ <I! <I! ~ ~ 15 ! E !! ~ 0 E <'! ~ ~ 0 " c7l o .J... ~ 2.00 2.50 3.bo 3.50 4.bo 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50 10.00 10.50 11 .00 11 .50 AFULI.W_24 .M Sat Dee O<l. 18 :25 :11 2010 Report Dale: 1211412~fU3%gt!111 ofiS Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via ~undance 2700000 2600000 2500000 2400000 2300000 1700000 1600000 1500000 1400000 1300000 1200000 1100000 1000000 900000 Quantitation Report C:\msdehem\1\DATA\DEC10-C\03DEC10A\ F23LCS20.D 3 Dee 2010 6:34 pm LCS VOC 120310B LCS SEE COVERSHEET FOR ID AND AMOUNTS 3 Sample Multiplier: 1 Dee 03 18:46:47 2010 C:\MSDCHEM\1\METHODS\AFULLW_24.M VOA Calibration Mon Nov 29 10:10:12 2010 Initial Calibration (Not Reviewed) TIC: F23LCS20.D\data.ms j !i! () 0 ~ i ~ ~ '" ~ ~ I <IJ gf I w '" ~ .ll e g u:: 0 f-!!l AFULLW_24.M Sat Dee 04 12:58:10 2010 Report Date: 12!14/2{j'!UJE!'"e.g~12 of 15 Quantitation Report C:\msdehem\1\DATA\DEC10-C\03DEC10A\ F2SLMBLK.D 3 Dec 2010 7:17 pm Data Path Data File Acq On Operator Sample Mise MB VOC 120310B MBLK S.OML ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via 5 Sample Multiplier: 1 Dec 04 13:03:23 2010 C:\MSDCHEM\1\METHODS\AFULLW_24.M VOA Calibration Mon Nov 29 10:10:12 2010 Initial Calibration (QT Reviewed) Abundance TIC: F25LMBLK.O\dala.ms 1500000 1450000 1400000 1350000' 1300000 1250000 1200000 1150000 1100000 1050000 1000000 950000 900000 850000 800000 750000 700000 650000 600000 ~ CIJ " 1f c 550000 J! os 1il ~ e 500000 E 0 e '5 g i5 450000 15 ~ E e 5 .Q 0 CIJ 400000 5 CIJ 350000 300000 250000 200000 150000 100000 I 50000 O~~~~~TnRTrR~~~~~~~~~",orl~~~~~~~J~~MMTrnTMM~~TM~rM~~~ Time-> 2"bo 2.59 3,00 3.~ 4.QO 4.50 5.00 5.~0. 6.00 6.50 7.00 7.50 8.00 8.50 9,00 9.~Q 1Q.00 1Q,?D 11.00 11.50 AFULLW_24.M Sat Dec 04 13:03:38 2010 Report Date: 12114/2ti'fUJEp'flgc113 of15 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via Quantitation Report C:\msdehem\1\DATA\DEC10-C\03DEC10A\ F40L0661.D 4 Dee 2010 12:02 am 1012066-001AMS MS 5.0ML 10F3 18 Sample Multiplier: 1 Dee 04 00:14:16 2010 C:\MSDCHEM\1\METHODS\AFULLW_24.M VOA Calibration Mon Nov 29 10:10:12 2010 Initial Calibration (Not Reviewed) bu~dance TIC: F40L0661.Dldata.ms 20 0000 1900000 1800000 1700000 1600000 1500000 1400000 1300000 1200000 1100000 1000000 90000.0 800000 700000 600000 500000 '400000 300000 200000 100000 -A. '" r= ~ E 0 E e <II lh ~ ?< a. .. E 0 ime··> 2.00 2 .. 50 }.OO 3.69 4.09 4.50 5.00 5.50 6.00 6.59 7.0.11 7.5_0 8.9.0 il.~ 9.00 9.50 10.00 10~50 11.00 11150 AFULLW_24.M Sat Dee 04 13:08:47 2010 Report Date: 12/14/2~fWEp'!lge'l14 ofl5 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via Abundance 1900000 1800000 rrlme-> 2. Quantitation Report C:\msdehem\1\DATA\DEC10-C\03DEC10A\ F41L0661.D 4 Dec 2010 12:21 am 1012066-001AMSD MSD 5.0ML 10F3 18 Sample Multiplier: 1 Dec 04 00:33:16 2010 C:\MSDCHEM\1\METHODS\AFULLW_24.M VOA Calibration Mon Nov 29 10:10:12 2010 Initial Calibration (Not Reviewed) TIC: F41 L0661 .0\data,ms AFULLW_24.M Sat Dec 04 13:09:21 2010 10.,00 10.50 11.00 11 , Report Date: 12114/2ti'fU.JE¥age115 of 15 · ----.- American West Analytical Laboratories WORK ORDER Summary Client: Denison Mines Client JD: DEN) 00 Contact: Io Ann TiscWer Project: 4th Quarter-Semialmual Groundwater QC Level: LEVEL ill Comments: No Hard Copies (UL). QC 3 & Summary. EDD-CSV. Report THF to ] ~lgIL.;~-l SamplelD Client Sample ID Collected Date Received Date DateDlle I012066·001A MW-35 12/112010 8:40:00 AM 12/312010 LO:OO:OOAM 1211712010 1012066·002A Trip Blank WI120!O 1211712010 Matrix Aqueous Work Order: 1012066 Page I ofl 12/312010 WOType: Project -1J~ Test Code Sel Storage 8260·W o VOCFridge 3 8260-W o VOCFridge , '-_ .. l . le\ZO~b ~ I Shee" of 1 CHAIN OF CUSTODY Samples Shipped to: American West Analytical Lab 463 West 3600 South Salt Lake City, Ut 84115 Contact: Ryan Palmer or David Turk Ph: 435 678 2221 rpalmer@denisonmines,com dturk@denisonmines.com Chain of Custody/Sampling Analysis Request p . rOJect S amp ers N arne S am~lers S' t !9-"a ure 4th Quarter·Semiannual :JoJ/J.VL-)j~V Groundwater Tanner Holliday Date Time Sample 10 Collected Collected Laboratory Analysis Requested MW35 12/1/2010 840 THF Trip Blank 12/1/2010 THF Please notify Ryan Palmer of Reciept tempature on these samples Immediately! Thank you. DatelTime Received By:(Signature) 1213/2010 1000 DatelTime ~ DatelTime V Lab Set ill: . \ D \ -Z Olo(o Sam nles Were: cae Tape Was: Container Type: g-Sj}ipped By: lA 'r' ~ Pl'esent on Outer Package D A WAL Supplied Plastic ../ o Hand Delivered IJ.26s 0 No 0 N/A D A WAL Supplied Clear Glass ./ o A):nbient Uo~en on Outer package o A WAL Supplied Amber Glass / rlYthiIled es DNa DN/A , TenJ.perature :A, 7< °C / presen~ample o A WAL Supplied VOArr~( Vials o Amber 0 Clear D Head ce D No Headspace Ree. BrokenlLeaking. DYes m1\Io DN/A 'DYes . 0 DN/A D Non A WAL Supp~ontainer Notes: .. Unbrol{en on sa~e V / o Yes DNa fA PrQperiy Preserved I1(Yes DNo DN/A Notes: Notes: , /- Ree. Within Hold MYes DNo Discrepancies Between Labels and cac Notes: Bottle Type Ammonia COD Cyanide Metals N02 & NOs Nutrients O&G Phenols Sulfide TKN TOe TP04 TPH Procedure: Notes: . .. . / Preservative All pHs OK ./ , .QH <2 H2SO4 / pH <2 H,S04 /' PH >12 NaOH /' pH <2'1INO, /' pH <2 H2SO4 • ./' pH <2 H2SO4 .' ./ pH <2 HCL /' .pH <2 H2S04 ' / .. pH> 9NaOH, ZnAC L . pH <2 H2SO4 / pH <2 H3P04 / " .. pH <2 H2SO4 / pH<2HCL / / / / 1/ Pour a small amount of sample in the sample lid Pour sample from Lid gently over wide range pH paper Do Not dip the pH paper in the sample boltle or lid . 1) 2} 3) 4) 5) If sample is not preserved. properly list its extension and receiving pH in the appropriate column above Flag CDC and notify client for further instructions .6) 7) Place client conversation on coe Samples may be adjusted at dient request /iJb . ' I .. . , " ,. >" PKf. Ree, DYes . , I / uNo . ' 'I I E~RGY _ 1'\\..'_)101\ I CHI~_~' www.energyiab.com AMf1/iuI Exullttlcl SItM IIS2 Helena, MT 877·472·0711 • Bllllnls, MT 800·735·4489 • Caspar, WY 888·235·0515 Gillette, WY 81&·88&·7175 • Rapid City, SO 888·&72·1225 • College Station, TX 888·&90·2218 ANALYTICAL SUMMARY REPORT February 23, 2011 Denison Mines USA Corp 6425 S Hwy 191 Blanding, UT 84511 Workorder No.: Cl 011 0505 Quote 10: C1640 -POC Wells Project Name: 4th Quarter-Semi-Annual Groundwater Energy Laboratories, Inc. Casper WY received the following 9 samples for Denison Mines USA Corp on 11/12/2010 for analysis. Sample ID Client Sample ID Collect Date Receive Date Matrix Test Cl 011 0505-001 MW 14 11/10/1015:15 11/12/10 Aqueous Metals by ICP/ICPMS, Dissolved Alkalinity QA Calculations Chloride Fluoride Nitrogen, Ammonia Nitrogen, Nitrate + Nitrite pH Gross Alpha minus Rn222 and Uranium Solids, Total Dissolved Sulfate SW8260B VOCs, Standard List Cl0ll0505-002 MW 25 11/10/10 12 :20 11/12/10 Aqueous Same As Above C 10110505-003 MW 29 11/09/1015:0511/12/10 Aqueous Same As Above Cl 011 0505-004 MW 30 11/09/10 12 :20 11/12/10 Aqueous Same As Above Cl 011 0505-005 MW31 11/09/10 14:30 11/12/10 Aqueous Same As Above Cl0ll0505-006 MW32 11/10/1013:20 11/12/10 Aqueous Same As Above Cl 011 0505-007 MW 65 11 /10/10 13 :20 11/12/10 Aqueous Same As Above C 10110505-008 Trip Blank 11/1 0/1 0 00 :00 11/12/10 Aqueous SW8260B VOCs, Standard List C 10110505-009 Temp Blank 11 /1 0/1 0 00 :00 11 /12/10 Aqueous Temperature This report was prepared by Energy Laboratories, Inc., 2393 Salt Creek Hwy., Casper, WY 82601. Any exceptions or problems with the analyses are noted in the Laboratory Analytical Report, the QA/QC Summary Report, or the Case Narrative. The results as reported relate only to the item(s) submitted for testing. If you have any questions regarding these test results, please call. Report Approved By: cS¥~D <J~~ Reporting Supervisor Digitally signed by Stephanie Waldrop Date: 2011 .02.23 14:08:57 -07:00 Page 1 of 38 / EN:RGY t=-~ ,,'. >I.ldU"··. ~ www.energylab.com AlulytJMrxr.u-. .. 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4481 • Casper, WY 888-235-0515 Gillette WY 86&-&86-7175 • Ra Id C SD 888-672-1225 · Colle e Station, TX 888-&90-2218 CLIENT: Denison Mines USA Corp Project: 4th Quarter-Semi-Annual Groundwater Sample Delivery Group: C 10110505 REVISED/SUPPLEMENTAL REPORT Revised Date: 02/23/11 Report Date: 12/29/10 CASE NARRATIVE The attached analytical report has been revised from a previously submitted report due to the request by Kathy Weinel on February 10, 2011 for the reanalysis of Gross Alpha minus Rn & U on all samples. The data presented here is from that recheck analysis. The Gross Alpha minus Uranium and Radon recheck data presented in this report is a result of multiple actions taken by the laboratory in order to meet the client stated goal of 'precision should be less than or equal to 20% of the reported analyte response'. The primary analytical changes include the use of a larger sample volume (2 times) coupled with an increased count time (4 times). which did result in reduced preciSion values. ORIGINAL SAMPLE SUBMITTAL(S) All original sample submittals have been returned with the data package. SAMPLE TEMPERATURE COMPLIANCE: 4"C (±2"C) Temperature of samples received may not be considered properly preserved by accepted standards. Samples that are hand delivered immediately after collection shall be considered acceptable if there is evidence that the chilling process has begun. GROSS ALPHA ANALYSIS Method 900.0 for gross alpha and gross beta is intended as a drinking water method for low TDS waters. Data provided by this method for non potable waters should be viewed as inconsistent. RADON IN AIR ANALYSIS The desired exposure time is 48 hours (2 days). The time delay in returning the canister to the laboratory for processing should be as short as possible to avoid excessive decay. Maximum recommended delay between end of exposure to beginning of counting should not exceed 8 days. SOIUSOLID SAMPLES All samples reported on an as received basis unless otherwise indicated. ATRAZINE, SIMAZINE AND PCB ANALYSIS Data for PCBs, Atrazine and Simazine are reported from EPA 525.2. PCB data reported by ELI reflects the results for seven individual Aroclors. When the results for all seven are ND (not detected), the sample meets EPA compliance criteria for PCB monitoring. SUBCONTRACTING ANALYSIS Subcontracting of sample analyses to an outside laboratory may be required. If so, ENERGY LABORATORIES will utilize its branch laboratories or qualified contract laboratories for this service. Any such laboratories will be indicated within the Laboratory Analytical Report. BRANCH LABORATORY LOCATIONS eli-b -Energy Laboratories, Inc. -Billings, MT eli-g -Energy Laboratories, Inc. -Gillette, WY eli-h -Energy Laboratories, Inc. -Helena, MT eli-r -Energy Laboratories, Inc. -Rapid City, SD eli-t -Energy Laboratories, Inc. -College Station, TX CERTIFICATIONS: USEPA: WY00002, Radiochemical WY00937; FL-DOH NELAC: E87641, Radiochemical E871 017; California: 02118CA; Oregon: WY200001 ; Utah: 3072350515; Virginia: 00057; Washington: C1903 ISO 17025 DISCLAIMER: The results of this Analytical Report relate only to the items submitted for analysis. ENERGY LABORATORIES, INC. -CASPER,WY certifies that certain method selections contained in this report meet requirements as set forth by the above accrediting authorities. Some results requested by the client may not be covered under these certifications. All analysis data to be submitted for regulatory enforcement should be certified in the sample state of origin. Please verify ELI's certification coverage by visiting www.energylab.com ELI appreCiates the opportunity to provide you with this analytical service. For additional information and services visit our web page www.energylab.com. Page 2 of 38 EN:RGY ;\ljOl,:d Lllll ':' www.energylab.com AMIyIk6/~smc. 1m Helena, MT877-472-D711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 Gillette, WY 8&B-I86-7175 • Rapid City, SD 888-&72-1225 • College StatiDn, TX 888-690-2218 QAlQC Summary Report Prepared by Casper, WY Branch Revised Date: 02123/11 Report Date: 12/29/10 Work Order: C 1011 0505 Client: Denison Mines USA Corp Project: 4th Quarter-Semi-Annual Groundwater Analyte Count Result Units Method: A2320 B Sample 10: MBLK Alkalinity, Total as CaC03 Carbonate as C03 Bicarbonate as HC03 Sample 10: LCS Alkalinity, Total as CaC03 Sample 10: Cl0110505-001AOUP Alkalinity, Total as CaC03 Carbonate as C03 Bicarbonate as HC03 Sample 10: C10110505-001AMS Alkalinity, Total as CaC03 Qualifiers: RL -Analyte reporting limit. 3 3 MOC -Minimum detectable concentration Method Blank ND mg/L ND mg/L NO mg/L Laboratory Control Sample 207 mg/L Sample Duplicate 395 mg/L NO mg/L 481 mg/L Sample Matrix Spike 533 mg/L RL %REC Low LImit High LImit Run: MANTECH_l01112B Run: MANTECH_l011128 5.0 104 90 110 Run: MANTECH_l01112B 5.0 5.0 5.0 Run: MANTECH_l01112B 5.0 111 80 120 NO -Not detected at the reporting limit. RPO RPOLimlt Qual 0.3 0.3 Batch: R139857 11/12/1016:28 11/12/1016:43 11/13/1001 :43 10 10 10 11/13/1001 :52 Page 19 of 38 EN:RGY /\ ~ If )f .. • .. 1 (., ~ I L • , www.energylab.com AM/ytIaI fJuIIftc, $/", lISt Helena, MT 877-472-0711 • BIllings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 886-886-7175 . Rapid City, SD 888-612-1225 • College Station, TX 888-610-2218 QA/Qe Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/29/10 Work Order: Cl 011 0505 Client: Denison Mines USA Corp Project: 4th Quarter-Semi-Annual Groundwater Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLImit Qual Method: A2540 C Batch: 101112_2_SLDS-TDS-W Sample 10: MBLK1_101112 Method Blank Run: BAL-l_l01112C 11 /12/10 15:00 Solids, Total Dissolved TDS @ 180 C ND mg/L 10 Sample 10: LCS1_l01112 Laboratory Control Sample Run: BAL-l_101112C 11/1211015:00 Solids, Total Dissolved TDS @ 180 C 983 mg/L 10 98 90 110 Sample 10: C10110505-007AMS Sample Matrix Spike Run: BAL-1 -101112C 11 /12/1015:11 Solids, Total Dissolved TDS @ 180 C 5760 mg/L 10 101 90 110 Sample 10: C10110505-007AMSO Sample Matrix Spike Duplicate Run: BAL-l_101112C 11 /12/1015:11 Solids, Total Dissolved TOS @ 180 C 5780 mg/L 10 102 90 110 0.3 10 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MDe - Minimum detectable concentration Page 20 of 38 EN:RGY ;\P.OI J/d , ..... d,l~ .... www.energylab.com AM/tIkM~SIItu rm Helena, MT 877-472-0711 • Billings, MT 800-735-4488 • Casper, WY 888-235-0515 Gillette, WY 8&6-186-7175 • Rapid City, SO 888-&72-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/29/10 Work Order: Cl0110505 Client: Denison Mines USA Corp Project: 4th Quarter-Semi-Annual Groundwater Analyte Count Result Units Method: A4S00-CI B Sample 10: MBLK9-101116 Chloride Sample 10: C10110S0S-007AMS Chloride Sample 10: C10110S0S-007AMSO Chloride Sample 10: LCS3S-101116 Chloride Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mg/L Sample Matrix Spike 119 mg/L Sample Matrix Spike Duplicate 120 mg/L Laboratory Control Sample 3510 mg/L RL %AEC Low Limit High limit APO APOLimlt Qual Batch: 101116-CL-TTR-W Run: TITRATION_101116A 11 /16/1008:56 0.5 Run: TITRATlON_101116A 11 /16/1009:37 1.0 99 90 110 Run: TITRATION_101116A 11/16/1009:39 1.0 100 90 110 0.7 10 Run: TITRATION_101116A 11/16/1009:41 1.0 99 90 110 ND -Not detected at the reporting limit. Page 21 of 38 EN:RGY www.energylab.com Helena, MT 877-472-D711 • Billings, MT 8DO-735-4488 • Casper, WY 888-235-0515 Gillette, WY 8&&-18&-7175 • Rapid City, so 888-&12-1225 • College StatiDn, 1X 888-&80-2218 / .. 1 ,,)J~/,' C:Ht ~. AMIybI EzuIllGct S/IIe. 1151 QAlQC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/29/10 Work Order: C 1011 0505 Client: Denison Mines USA Corp Project: 4th Quarter-Semi-Annual Groundwater ------------------ Analyte Count Result Units RL %REC Low Limit High limit RPO RPOLimlt Qual Method: A4S00·F C Batch: R139826 Sample 10: MBLK Method Blank Run: MANTECH_101112A 11/12/10 09:51 Fluoride ND mg/L 0.05 Sample 10: LCS Laboratory Control Sample Run: MANTECH_101112A 11/12110 09:58 Fluoride 1.02 mg/L 0.10 102 90 110 Sample 10: C10110S0S-007AMS Sample Matrix Spike Run: MANTECH_1 01112A 11/12/1013:40 Fluoride 1.06 mg/L 0.10 88 80 120 Sample 10: C10110S05-007AMSO Sample Matrix Spike Duplicate Run: MANTECH_101112A 11/1211013:43 Fluoride 1.08 mg/L 0.10 90 80 120 1.9 10 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 22 of 38 EI\ERGY l\'IOJU\I CI Hl ', www.energylab.com AuIfIItM ru.u-SIJIu IW Helena, MT 871-472-0711 • Billings, MT 800-735-4488 • Casper, WY 888-235-0515 Gillette, WY 8&&-18&-7175 • Rapid City, so 888-672-1225 • College Station, TX 888-610-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 4th Quarter-Semi-Annual Groundwater Revised Date: 02/23/11 Report Date: 12/29/10 Work Order: C1 0110505 Analyte Method: A4500-H B Sample 10: ICV1_101112_4 pH Method: A4500-H B Sample 10: C10110505-006AOUP pH Qualifiers: RL -Analyte reporting limit. -----------------------------------------------------------------, Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Initial Calibration Verification Standard 6.86 S.u. 0.010 100 Sample Duplicate 7.19 S.u. 0.010 98 Analytical Run: ORION555A-2_101112D 11/1211014:33 102 Batch: 101112_ 4_PH-W_555A-2 Run: ORION555A-2_101112D 11/1211015:35 0.6 10 ND -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 23 of 38 EN:RGY /\II~)r .. \1 CI../ll ~. www.energylab.com AMIytkM &utIHt:t S/Rc, "51 Helena, MT 817-472-0711 • Billings, MT 800-135-4489 • Casper, WY 888-235-0515 Gillette, WY 8BB-B86-7175 • Rapid City, SD 888-&72-1225 • College Sialion, IX 888-690-221 8 QA/Qe Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/29/10 Work Order: C10110505 Client: Denison Mines USA Corp Project: 4th Quarter-Semi-Annual Groundwater Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: A4S00-NH3 G Batch: R140044 Sample 10: MBLK-1 Method Blank Run: TECHNICON_l 01117A 11 /17/1012:00 Nitrogen, Ammonia as N ND mg/L 0.02 Sample 10: LCS-2 Laboratory Control Sample Run: TECHNICON_l 01117A 11 /17/1012:02 Nitrogen, Ammonia as N 1.93 mg/L 0.050 96 90 110 Sample 10: Cl0110S04-0050MS Sample Matrix Spike Run : TECHNICON_l 01117A 11 /1 7/1015:58 Nitrogen, Ammonia as N 3.91 mg/L 0.050 98 80 120 Sample 10: Cl0110S04-0050MSO Sample Matrix Spike Duplicate Run : TECHNICON_i 011i7A 11/17/1016:00 Nitrogen, Ammonia as N 4.08 mg/L 0.050 107 80 120 4.3 10 Sample 10: C10110S37-003CMS Sample Matrix Spike Run: TECHNiCON_101117A 11/17/1016:30 Nitrogen, Ammonia as N 1.92 mg/L 0.050 96 80 120 Sample 10: C10110S37-003CMSO Sample Matrix Spike Duplicate Run: TECHNICON_l 01117A 11/17/1 0 16 :32 Nitrogen, Ammonia as N 2.09 mg/L 0.050 104 80 120 8.5 10 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 24 of 38 EN:RGY .' ,'\·\OI-H·dCI~I! ~~ www.energylab.com AIuJ/yIkIIbullftc.smu,15Z Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 88&-IB6-7175 • Rapid City, SD 888-&72-1225 • College Sialion, TX 888-&90-221 B QAlQC Summary Report Prepared by Casper. WY Branch Revised Date: 02/23/11 Report Date: 12/29/10 Work Order: C1 011 0505 Client: Denison Mines USA Corp Project: 4th Quarter-Semi-Annual Groundwater Analyte Count Result Units Method: A4500-S04 E Sample 10: BLNKB-1_101116 Sulfate Sample 10: LCS-1_101116 Sulfate Sample 10: C10110505·007AMS Sulfate Method Blank 10 mg/L Laboratory Control Sample 4950 mg/L Sample Matrix Spike 3240 mg/L -Matrix spike recoveries outside the acceptance range are considered matrix-related. Sample 10: C10110505·007AMSO Sulfate Sample Matrix Spike Duplicate 3260 mg/L -Matrix spike recoveries outside the acceptance range are considered matrix-related. Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration RL %REC Low Limit High LImit Run: TURB-2_101116A 0.8 Run: TURB-2_1 01116A 100 103 90 110 Run: TURB-2_101116A 50 86 90 110 Run: TURB-2_1 01116A 50 88 90 110 ND -Not detected at the reporting limit. RPO RPDLlmit Qual Batch: 101116_CS04-TURB-W 11/16/1013:28 11/16/1 0 13 :29 11/16/1014:23 S 11/16/1014:26 0.6 10 S S -Spike recovery outside of advisory limits. Page 25 of 38 EI\ERGY ._/\UOt ."IOI~I L·'; www.energylab.com ~£xuI/f",SlIIU IW Helen., lIT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 866-&8&-7175 • Rapid City, SD 888-672-1225 • College Sialion, TX 888-&80-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Report Date: 12/29/10 Project: 4th Quarter-Semi-Annual Groundwater Work Order: Cl all 0505 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLImit Qual Method: E200.7 Batch: R140483 Sample 10: MB-101201A 5 Method Blank Run: ICP2-C_l01201A 12/01/1013:00 Calcium ND mg/L 0.2 Iron ND mg/L 0.002 Magnesium ND mg/L 0.05 Potassium ND mg/L 0.02 Sodium ND mg/L 0.3 Sample 10: LFB-101201A 5 Laboratory Fortified Blank Run : ICP2-C_l01201A 12/01/1013:04 Calcium 48.7 mg/L 0.50 97 85 115 Iron 0.955 mg/L 0.030 95 85 115 Magnesium 49.9 mg/L 0.50 100 85 115 Potassium 43.4 mg/L 0.50 87 85 115 Sodium 46.2 mg/L 0.50 92 85 115 Sample 10: C10110250-007CMS2 5 Sample Matrix Spike Run: ICP2-C_l01201A 12/01/1015:04 Calcium 304 mg/L 1.0 95 70 130 Iron 1.93 mg/L 0.030 94 70 130 Magnesium 115 mg/L 1.0 95 70 130 Potassium 90.7 mg/L 1.0 84 70 130 Sodium 141 mg/L 1.0 94 70 130 Sample 10: C10110250-007CMSO 5 Sample Matrix Spike Duplicate Run: ICP2-C_l01201A 12/01 /1015:08 Calcium 302 mg/L 1.0 93 70 130 0.5 20 Iron 1.90 mg/L 0.030 93 70 130 1.9 20 Magnesium 115 mg/L 1.0 95 70 130 0.0 20 Potassium 93.1 mg/L 1.0 86 70 130 2.7 20 Sodium 140 mg/L 1.0 93 70 130 0.9 20 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 26 of 38 EN:RGY I\! jOIlHI OUI: -..; www.energylab.com AM/yIIa/ ExA/I8Ja SIItu 181 Helena, MT 877-472-0711 • Billings, MT 800-735-4488 . Casper, WY 888-235-0515 Gillette, WY 8&&-18&-7175 · Rapid City, SD 888-672-1225 • College Station, TX 888-&80-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Report Date: 12/29/10 Project: 4th Quarter-Semi-Annual Groundwater Work Order: C 10110505 Analyte Count Result Units RL %REC Low limit High Limit RPO RPOLimit Qual Method: E200.7 Batch: R140655 Sample 10: MB-101206A 4 Method Blank Run: ICP2-C_l01206A 12106/10 11 :24 Calcium ND mg/L 0.2 Magnesium ND mg/L 0.05 Potassium ND mg/L 0.02 Sodium ND mg/L 0.3 Sample 10: LFB-101206A 4 Laboratory Fortified Blank Run: ICP2-C_l01206A 12/06/1 0 11 :28 Calcium 49.8 mg/L 0.50 100 85 115 Magnesium 51.2 mg/L 0.50 102 85 115 Potassium 43.4 mg/L 0.50 87 85 115 Sodium 48.0 mg/L 0.50 96 85 115 Sample 10: Cl0110470-001CMS2 4 Sample Matrix Spike Run: ICP2-C_l01206A 12/06/10 12:21 Calcium 313 mg/L 1.0 105 70 130 Magnesium 117 mg/L 1.0 98 7,0 130 Potassium 93.0 mg/L 1.0 87 70 130 Sodium 149 mg/L 1.0 99 70 130 Sample 10: Cl0110470-001CMSO 4 Sample Matrix Spike Duplicate Run: ICP2-C_l01206A 12/06/1012:25 Calcium 313 mg/L 1.0 105 70 130 0.0 20 Magnesium 117 mg/L 1.0 97 70 130 0.3 20 Potassium 95.1 mg/L 1.0 89 70 130 2.2 20 Sodium 152 mg/L 1.0 102 70 130 1.8 20 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 27 of 38 EN:RGY 1\1:')IU,lnfHL~ www.energylab.com AM/ytIaI rxuu.a SIK. 1m Helena, tofT 877-472-0711 • Billings, MT 800-735-4481 • Casper, WY 888-235-0515 Gillette, WY 866-186-7175 • Rapid City, SD IB8-&72-1225 • College Station, IX 888-69D-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/29/10 Work Order: C1 0110505 Client: Denison Mines USA Corp Project: 4th Quarter-Semi-Annual Groundwater Analyte Count Result Units RL %REC Low Limit High Limit RPO RPDLimit Qual Method: E200.8 Batch: R140133 Sample 10: LRB 17 Method Blank Run: ICPMS2-C_l01119A 11/19/10 11 :56 Arsenic NO mg/L 6E-05 Beryllium NO mg/L 3E-05 Cadmium NO mg/L lE-05 Chromium NO mg/L 4E-05 Cobalt NO mg/L 2E-05 Copper NO mg/L 7E-05 Lead NO mg/L 3E-05 Manganese NO mg/L 5E-05 Mercury NO mg/L 8E-05 Molybdenum 6E-05 mg/L 5E-05 Nickel NO mg/L 0.0007 Selenium NO mg/L 0.0002 Thallium NO mg/L lE-05 Tin 0.0002 mg/L 6E-05 Uranium NO mg/L 1 E-05 Vanadium NO mg/L 3E-05 Zinc 0.003 mg/L 0.0003 Sample 10: LFB 17 Laboratory Fortified Blank Run: ICPMS2-C_l01119A 11/19/1014:51 Arsenic 0.0544 mg/L 0.0010 109 85 115 Beryllium 0.0565 mg/L 0.0010 113 85 115 Cadmium 0.0533 mg/L 0.0010 107 85 115 Chromium 0.0528 mg/L 0.0010 106 85 115 Cobalt 0.0521 mg/L 0.0010 104 85 115 Copper 0.0511 mg/L 0.0010 102 85 115 Lead 0.0529 mg/L 0.0010 106 85 115 Manganese 0.0530 mg/L 0.0010 106 85 115 Mercury 0.00545 mg/L 0.0010 109 85 115 Molybdenum 0.0535 mg/L 0.0010 107 85 115 Nickel 0.0515 mg/L 0.0010 103 85 115 Selenium 0.0553 mg/L 0.0010 111 85 115 Thallium 0.0530 mg/L 0.0010 106 85 115 Tin 0.0543 mg/L 0.0010 108 85 115 Uranium 0.0555 mg/L 0.00030 111 85 115 Vanadium 0.0525 mg/L 0.0010 105 85 115 Zinc 0.0527 mg/L 0.0010 100 85 115 Sample 10: C101105B4-003BMS4 17 Sample Matrix Spike Run : ICPMS2-C_l01119A 11/20/1010:10 Arsenic 0.0505 mg/L 0.0010 100 70 130 Beryllium 0.0447 mg/L 0.010 89 70 130 Cadmium 0.0472 mg/L 0.010 94 70 130 Chromium 0.0486 mg/L 0.0010 97 70 130 Cobalt 0.0480 mg/L 0.010 93 70 130 Copper 0.0547 mg/L 0.010 103 70 130 Lead 0.0510 mg/L 0.050 102 70 130 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MOC -Minimum detectable concentration Page 28 of 38 EI\ERGY I ',l I www.energylab.com AMIy/k6I bullHcl SIIIu 11$1 Helena, MT 817-472-0711 • Billings, MT 800-735-44B9 • Casper, WY 8B8-235-0515 Gillette, WY B&6-186-7175 • Rapid City, SO 888-672-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Report Date: 12/29/10 Project: 4th Quarter-Semi-Annual Groundwater Work Order: C 10110505 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: E200.8 Batch: R140133 Sample 10: C10110584-003BMS4 17 Sample Matrix Spike Run: ICPMS2-C_101119A 11/20/10 10:10 Manganese 0.04B7 mg/L 0.010 93 70 130 Mercury 0.004B9 mg/L 0.0010 9B 70 130 Molybdenum 0.0433 mg/L 0.0010 B6 70 130 Nickel 0.054B mg/L 0.050 100 70 130 Selenium 0.141 mg/L 0.0010 83 70 130 Thallium 0.0339 mg/L 0.0010 6B 70 130 S Tin 0.0404 mg/L 0.0010 81 70 130 Uranium 0.102 mg/L 0.00030 110 70 130 Vanadium 0.0504 mg/L 0.0010 9B 70 130 Zinc 0.0469 mg/L 0.010 B5 70 130 Sample 10: C10110584-003BMSO 17 Sample Matrix Spike Duplicate Run: ICPMS2-C_101119A 11 /20/1010:17 Arsenic 0.0523 mg/L 0.0010 104 70 130 3.6 20 Beryllium 0.0452 mg/L 0.010 90 70 130 0.9 20 Cadmium 0.0479 mg/L 0.010 96 70 130 1.5 20 Chromium 0.0477 mg/L 0.0010 95 70 130 1.7 20 Cobalt 0.04B3 mg/L 0.010 94 70 130 0.6 20 Copper 0.0542 mg/L 0.010 102 70 130 1.0 20 Lead 0.0515 mg/L 0.050 103 70 130 0.9 20 Manganese 0.0493 mg/L 0.010 95 70 130 1.1 20 Mercury 0.00505 mg/L 0.0010 101 70 130 3.2 20 Molybdenum 0.0451 mg/L 0.0010 90 70 130 4.1 20 Nickel 0.0544 mg/L 0.050 99 70 130 0.7 20 Selenium 0.144 mg/L 0.0010 89 70 130 2.0 20 Thallium 0.0356 mg/L 0.0010 71 70 130 4.B 20 Tin 0.0440 mg/L 0.0010 BB 70 130 B.6 20 Uranium 0.102 mg/L 0.00030 110 70 130 0.1 20 Vanadium 0.0506 mg/L 0.0010 99 70 130 0.3 20 Zinc 0.0472 mg/L 0.010 B6 70 130 0.6 20 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MDC -Minimum detectable concentration S -Spike recovery outside of advisory limits. Page 29 of 38 EI\ERGY _!\UU't/,1 UI-</Il ..... www.energylab.com AMIyIIa/ E-"-SIIIu 1m Helena, MT 877-472-D711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 888-886-7175 • Rapid City, SO 888-672-1225 • College Station, TX 888-&90-2218 QA/Qe Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Report Date: 12/29/10 Project: 4th Quarter-Semi-Annual Groundwater Work Order: C1 0110505 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLlmlt Qual Method: E200.8 Batch: R140353A Sample 10: C10110681-001CMS4 6 Sample Matrix Spike Run: ICPMS4-C_101129B 11 /29/10 23 :23 Beryllium 0.0473 mg/L 0.010 95 70 130 Chromium 0.0483 mg/L 0.0010 96 70 130 Cobalt 0.0507 mg/L 0.010 101 70 130 Manganese 0.0625 mg/L 0.010 101 70 130 Silver 0.D141 mg/L 0.010 71 70 130 Vanadium 0.0514 mg/L 0.0010 97 70 130 Sample 10: C10110681-001CMSO 6 Sample Matrix Spike Duplicate Run: ICPMS4-C_101129B 11/29/10 23:29 Beryllium 0.0470 mg/L 0.010 94 70 130 0.7 20 Chromium 0.0505 mg/L 0.0010 101 70 130 4.5 20 Cobalt 0.0534 mg/L 0.010 106 70 130 5.2 20 Manganese 0.0644 mg/L 0.010 105 70 130 3.0 20 Silver 0.0152 mg/L 0.010 76 70 130 7.3 20 Vanadium 0.0531 mg/L 0.0010 100 70 130 3.1 20 Sample 10: LRB 6 Method Blank Run: ICPMS4-C_101129B 11/29/1019:01 Beryllium ND mg/L 3E-05 Chromium ND mg/L 5E-05 Cobalt ND mg/L 1 E-05 Manganese NO mg/L 2E-05 Silver ND mg/L 8E-05 Vanadium ND mg/L 1E-05 Sample 10: LFB 6 Laboratory Fortified Blank Run: ICPMS4-C_101129B 11/29/1019:08 Beryllium 0.0539 mg/L 0.0010 108 85 115 Chromium 0.0517 mg/L 0.0010 103 85 115 Cobalt 0.0532 mg/L 0.0010 106 85 115 Manganese 0.0525 mg/L 0.0010 105 85 115 Silver 0.0206 mg/L 0.0010 103 85 115 Vanadium 0.0510 mg/L 0.0010 102 85 115 Qual itlers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MOC -Minimum detectable concentration Page 30 of 38 EN:RGY ~.,\fjOI1/\I Oll!l !:: www.energylab.com Alultb/~SIIta '152 Helena, MT 877-472-0711 • Billings, MT 800-735-4488 • Casper, WY 888-235-0515 Gillette, WY 886-188-7175 • Rapid City, SO 188-&72-1225 • College Station, TX 888-&80-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/29/10 Work Order: C10110505 Client: Denison Mines USA Corp Project: 4th Quarter-Semi-Annual Groundwater Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLlmlt Qual Method: E353.2 Batch: R139845 Sample 10: MBLK-1 Method Blank Run: TECHNICON_1 01112A 11/12/1013:00 Nitrogen, Nitrate+Nitrite as N ND mg/L 0.04 Sample 10: LCS-2 Laboratory Control Sample Run: TECHNICON_101112A 11/12/1013:02 Nitrogen, Nitrate+Nitrite as N 2.50 mg/L 0.10 100 90 110 Sample 10: C10110505-007CMS Sample Matrix Spike Run: TECHNICON_1 01112A 11/12/1016:30 Nitrogen, Nitrate+Nitrite as N 1.93 mg/L 0.10 96 90 110 Sample 10: C10110505-007CMSO Sample Matrix Spike Duplicate Run: TECHNICON_1 01112A 11/12/10 16:32 Nitrogen, Nitrate+Nitrite as N 1.94 mg/L 0.10 97 90 110 0.5 10 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 31 of 38 EN:RGY ~l\l.(U I/~I GI{1l ~ www.energylab.com AMIy/IcMEiuIIH,.U",,'lJt Helena, MT 877-472-0711 • Billings, MT BOO-735-44BB . Casper, WY 888-235-0515 Gillatta, WY 8&&-186-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-680-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/29/10 Work Order: C1 011 0505 Client: Denison Mines USA Corp Project: 4th Quarter-Semi-Annual Groundwater ------------------------- Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: E900.1 Batch: GA-0395 Sample 10: MB-GA-0395 3 Method Blank Run : G542M_11 0217A 02/22111 22:32 Gross Alpha minus Rn & U -0.07 pC ilL U Gross Alpha minus Rn & U Precision (±) 0.06 pC ilL Gross Alpha minus Rn & U MDC 0.1 pCi/L Sample 10: LCS-GA-0395 Laboratory Control Sample Run: G542M_110217A 02/22/11 22:32 Gross Alpha minus Rn & U 11.6 pC ilL 111 70 130 Sample 10: C11020352-001CMS Sample Matrix Spike Run: G542M_110217A 02123/11 05:25 Gross Alpha minus Rn & U 20.2 pCi/L 94 70 130 Sample 10: C11020352-001CMSO Sample Matrix Spike Duplicate Run: G542M_110217A 02123/11 05 :25 Gross Alpha minus Rn & U 20.2 pCilL 94 70 130 0.2 17 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MDC -Minimum detectable concentration U -Not detected at minimum detectable concentration Page 32 of 38 EN:RGY _1\~l.OI ;J,r ()JHL~; www.erwrgylab.com ~/Exu/l8clSIIIc' 1m Helena, MT 817-472-0711 • Billings, MT 800-735-4489 . Casper, WY 8.1-235-0515 Gillette, WY 86&-&86-7175 • Rapid City, SD 888-672-1225 • College Station, TJ( 888-680-2218 QAlQe Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Report Date: 12/29/10 Project: 4th Quarter-Semi-Annual Groundwater Work Order: C1 011 0505 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLlmlt Qual Method: SW8260B Batch: R140181 Sample 10: 111910_LCS_4 16 Laboratory Control Sample Run: SATURNCA_101119A 11 /19/1012:50 Acetone 110 ug/L 20 107 70 130 Benzene 9.9 ug/L 1.0 99 70 130 Carbon tetrachloride 9.1 ug/L 1.0 91 70 130 Chloroform 9.6 ug/L 1.0 96 70 130 Chloromethane 7.8 ug/L 1.0 78 70 130 m+p-Xylenes 19 ug/L 1.0 97 70 130 Methyl ethyl ketone 100 ug/L 20 104 70 130 Methylene chloride 9.4 ug/L 1.0 94 70 130 Naphthalene 8.8 ug/L 1.0 88 70 130 o-Xylene 10 ug/L 1.0 102 70 130 Toluene 9.8 ug/L 1.0 98 70 130 Xylenes, Total 29 ug/L 1.0 98 70 130 Surr: 1,2-0ichlorobenzene-d4 1.0 102 80 120 Surr: Oibromofluoromethane 1.0 98 70 130 Surr: p-Bromofluorobenzene 1.0 99 80 130 Surr: Toluene-d8 1.0 107 80 120 Sample 10: 111910_MBLK_6 16 Method Blank Run: SATURNCA_101119A 11 /19/1014:03 Acetone NO ug/L 20 Benzene NO ug/L 1.0 Carbon tetrachloride NO ug/L 1.0 Chloroform NO ug/L 1.0 Chloromethane NO ug/L 1.0 m+p-Xylenes NO ug/L 1.0 Methyl ethyl ketone NO ug/L 20 Methylene chloride NO ug/L 1.0 Naphthalene NO ug/L 1.0 o-Xylene NO ug/L 1.0 Toluene NO ug/L 1.0 Xylenes, Total NO ug/L 1.0 Surr: 1,2-0ichlorobenzene-d4 1.0 109 80 120 Surr: Oibromofluoromethane 1.0 91 70 130 Surr: p-Bromofluorobenzene 1.0 102 80 120 Surr: Toluene-d8 1.0 102 80 120 Sample 10: C10110538-006AMS 16 Sample Matrix Spike Run: SATURNCA_101119A 11/19/1021 :08 Acetone 130000 ug/L 20000 128 70 130 Benzene 35000 ug/L 1000 117 70 130 Carbon tetrachloride 11000 ug/L 1000 112 70 130 Chloroform 11000 ug/L 1000 113 70 130 Chloromethane 16000 ug/L 1000 159 70 130 S m+p-Xylenes 24000 ug/L 1000 101 70 130 Methyl ethyl ketone 110000 ug/L 20000 114 70 130 Methylene chloride 10000 ug/L 1000 104 70 130 Naphthalene 9900 ug/L 1000 99 70 130 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MOC -Minimum detectable concentration S -Spike recovery outside of advisory limits. Page 33 of 38 EN:RGY .\"OJ~/d()HL !; YIWW.enelgylab.com AMIyIIm £zrMIMN:I SIIIu 1m Helena, MT 877-472-0711 • Billings, MT 80o-735-448B • Casper, WY 888-235-0515 Gillette, WY 8&&-188-7175 • Rapid City, so 888-672-1225 • College Station, TX 888-&80-2218 QA/Qe Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Report Date: 12/29/10 Project: 4th Quarter-Semi-Annual Groundwater Work Order: C1 011 0505 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: SW8260B Batch: R140181 Sample 10: C10110538-006AMS 16 Sample Matrix Spike Run: SATURNCA_l01119A 11/19/1 0 21 :08 o-Xylene 12000 ug/L 1000 100 70 130 Toluene 27000 ug/L 1000 116 70 130 Xylenes, Total 36000 ug/L 1000 100 70 130 Surr: 1,2-Dichlorobenzene-d4 1.0 107 80 120 Surr: Oibromofluoromethane 1.0 101 70 130 Surr: p-Bromofluorobenzene 1.0 100 80 120 Surr: Toluene-d8 1.0 101 80 120 Sample 10: C10110538-006AMSO 16 Sample Matrix Spike Duplicate Run : SATURNCA_101119A 11/19/1021 :45 Acetone 130000 ug/L 20000 134 70 130 4.3 20 S Benzene 34000 ug/L 1000 106 70 130 3.3 20 Carbon tetrachloride 11000 ug/L 1000 114 70 130 2.5 20 Chloroform 12000 ug/L 1000 118 70 130 4.5 20 Chloromethane 16000 ug/L 1000 164 70 130 2.7 20 S m+p-Xylenes 25000 ug/L 1000 105 70 130 3.9 20 Methyl ethyl ketone 120000 ug/L 20000 121 70 130 6.1 20 Methylene chloride 11000 ug/L 1000 110 70 130 5.2 20 Naphthalene 9600 ug/L 1000 96 70 130 2.9 20 o-Xylene 12000 ug/L 1000 106 70 130 4.6 20 Toluene 25000 ug/L 1000 100 70 130 6.1 20 Xylenes, Total 37000 ug/L 1000 106 70 130 4.1 20 Surr: 1,2-Dichlorobenzene-d4 1.0 102 80 120 0.0 10 Surr: Oibromofluoromethane 1.0 108 70 130 0.0 10 Surr: p-Bromofluorobenzene 1.0 98 80 120 0.0 10 Surr: Toluene-dB 1.0 100 80 120 0.0 10 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MOC -Minimum detectable concentration S -Spike recovery outside of advisory limits. Page 34 of 38 EN:RGY • /'.UOJ ,,·~I Ol--ll( ~ WWN.energyiab.com AM/fI*6I esuu.ta SItIu 1m Helena, MT 817-472-0711 • Billings, MT 800-735-44B9 • Cuper, WY B88-235-0515 Gillette, WY 816-886-7175 • Rapid City, SD 888-&72-1225 • College Station, TX 8BB-6BO-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/29/10 Work Order: C10110505 Client: Denison Mines USA Corp Project: 4th Quarter-Semi-Annual Groundwater Analyte Count Result Units RL %REC Low Limit High limit RPO RPOLimlt Qual Method: SW8260B Batch: R140212 Sample 10: 22-Nov-10_LCS3 16 Laboratory Control Sample Run: GCMS2_1011228 11/22/1014:55 Acetone 120 ug/L 20 120 70 130 Benzene 9.2 ug/L 1.0 92 70 130 Carbon tetrachloride 8.2 ug/L 1.0 82 70 130 Chloroform 9.2 ug/L 1.0 92 70 130 Chloromethane 9.1 ug/L 1.0 91 70 130 m+p-Xylenes 18 ug/L 1.0 91 70 130 Methyl ethyl ketone 110 ug/L 20 111 70 130 Methylene chloride 8.6 ug/L 1.0 86 70 130 Naphthalene 8.6 ug/L 1.0 86 70 130 o-Xylene 9.0 ug/L 1.0 90 70 130 Toluene 9.4 ug/L 1.0 94 70 130 Xylenes, Total 27 ug/L 1.0 90 70 130 Surr: 1,2-0ichlorobenzene-d4 1.0 105 80 120 Surr: Oibromofluoromethane 1.0 105 70 130 Surr: p-Bromofluorobenzene 1.0 98 80 130 Surr: Toluene-d8 1.0 101 80 120 Sample 10: 22-Nov-10_MBLK_6 16 Method Blank Run: GCMS2_101122B 11/22/1016:05 Acetone NO ug/L 20 Benzene NO ug/L 1.0 Carbon tetrachloride NO ug/L 1.0 Chloroform NO ug/L 1.0 Chloromethane NO ug/L 1.0 m+p-Xylenes NO ug/L 1.0 Methyl ethyl ketone NO ug/L 20 Methylene chloride NO ug/L 1.0 Naphthalene NO ug/L 1.0 o-Xylene NO ug/L 1.0 Toluene NO ug/L 1.0 Xylenes, Total NO ug/L 1.0 Surr: 1,2-0ichlorobenzene-d4 1.0 108 80 120 Surr: Oibromofluoromethane 1.0 108 70 130 Surr: p-Bromofluorobenzene 1.0 98 80 120 Surr: Toluene-d8 1.0 100 80 120 Sample 10: C10110702-006AMS 16 Sample Matrix Spike Run: GCMS2_101122B 11/22/10 21 :26 Acetone 1200 ug/L 200 117 70 130 Benzene 120 ug/L 10 97 70 130 Carbon tetrachloride 75 ug/L 10 75 70 130 Chloroform 93 ug/L 10 93 70 130 Chloromethane 60 ug/L 10 60 70 130 S m+p-Xylenes 740 ug/L 10 80 70 130 Methyl ethyl ketone 1100 ug/L 200 110 70 130 Methylene chloride 87 ug/L 10 87 70 130 Naphthalene 160 ug/L 10 106 70 130 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MDC -Minimum detectable concentration S -Spike recovery outside of advisory limits. Page 35 of 38 EN:RGY .f\I,OH,\ICllll ~ www.energylab.com AIuIftIt:M IxuI1wIu SIta 1m Helena, NT 877-472-0711 • Billings, MT BOO-735-4489 • Cuper, WY 888-235-0515 Gillette, WY 8&&-&86-7175 • Rapid City, so 888-&72-1225 • College Sialion, TX 888-&90-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Report Date: 12/29/10 Project: 4th Quarter-Semi-Annual Groundwater Work Order: C1 0110505 Analyte Count Result Units RL %REC Low limit High Limit RPO RPOLImit Qual Method: SW8260B Batch: R140212 Sample 10: C10110702-006AMS 16 Sample Matrix Spike Run: GCMS2_101122B 11/22/10 21 :26 a-Xylene 440 ug/L 10 96 70 130 Toluene 500 ug/L 10 109 70 130 Xylenes, Total 1200 ug/L 10 85 70 130 Surr: 1,2-Dichlorobenzene-d4 1.0 108 80 120 Surr: Dibromofluoromethane 1.0 109 70 130 Surr: p-Bromofluorobenzene 1.0 96 80 120 Surr: Toluene-d8 1.0 105 80 120 Sample 10: C10110702-006AMSO 16 Sample Matrix Spike Duplicate Run: GCMS2_101122B 11/22/10 22:01 Acetone 1100 ug/L 200 111 70 130 5.3 20 Benzene 120 ug/L 10 100 70 130 2.7 20 Carbon tetrachloride 80 ug/L 10 BO 70 130 5.7 20 Chloroform 97 ug/L 10 97 70 130 4.2 20 Chloromethane 64 ug/L 10 64 70 130 5.8 20 S m+p-Xylenes 760 ug/L 10 90 70 130 2.7 20 Methyl ethyl ketone 1100 ug/L 200 112 70 130 1.4 20 Methylene chloride 92 ug/L 10 92 70 130 5.4 20 Naphthalene 160 ug/L 10 112 70 130 4.0 20 a-Xylene 450 ug/L 10 104 70 130 1.B 20 Toluene 490 ug/L 10 105 70 130 O.B 20 Xylenes, Total 1200 ug/L 10 95 70 130 2.3 20 Surr: 1,2-Dichlorobenzene-d4 1.0 106 BO 120 0.0 10 Surr: Dibromofluoromethane 1.0 106 70 130 0.0 10 Surr: p-Bromofluorobenzene 1.0 94 80 120 0.0 10 Surr: Toluene-dB 1.0 103 80 120 0.0 10 Qualifiers: RL -Analy1e reporting limit. ND -Not detected at the reporting limit. MDC -Minimum detectable concentration S -Spike recovery outside of advisory limits. Page 36 of 38 EN:RGY , ,"'d I{)I/,"'I (..HHl .... www.energylab.com Alulytfal &u/IIIIU SIIIu 1m Helena, tIT 877"'72-0711 • Billings, MT 808-735-4419 . Casper, WY 888-235-0515 Gil/alta, WY 886-&8&-1175 · Rapid City, SD 888-872-1225 . College Stallon, 1X 888-680-2218 Workorder Receipt Checklist Denison Mines USA Corp IIIIIIIIIIIII~~ IIIIIIII~ ~IIIIIIII~IIIIIIIIIIIII~ C10110505 Login completed by: Halley Ackerman Reviewed by: BL2000\kschroeder Reviewed Date: 11/18/2010 Shipping container/cooler in good condition? Custody seals intact on shipping container/cooler? Custody seals intact on sample bottles? Chain of custody present? Chain of custody signed when relinquished and received? Chain of custody agrees with sample labels? Samples in proper container/bottle? Sample containers intact? Sufficient sample volume for indicated test? All samples received within holding time? ContainerlTemp Blank temperature: Water -VOA vials have zero headspace? Water -pH acceptable upon receipt? Contact and Corrective Action Comments: None Yes 0 Yes 0 Yes 0 Yes 0 Yes 0 Yes 0 Yes 0 Yes 0 Yes 0 Yes 0 3°C On Ice Yes 0 Yes 0 Date Received: 11/12/2010 Received by: ckw Carrier name: Fed Ex No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 Not Present 0 Not Present 0 Not Present 0 No VOA vials submitted 0 Not Applicable 0 Page 37 of 38 "U III to CD W co o -w co "~Il{.Y Chain of Custody and Analytical Request Record ,efBlJifitdUY4' PLEASE PRINT (Provide as much information as possible.) Page _1_ of ---1- Compan~~ame: \ Project Name, PWS. Permit, Etc. t Sample Origin EPA/State Compliance: Uen 1,50t'\ M. n~ L.f11, ~<r-5a"1:cm~\ G-counJvJtA1't:r State: lX(" Yes I!I No 0 Report Mail Address: "PO ~()( is'~'\ Contact Name: Phone/Fax: Email: Sampler: (Plea~e Print) ~ \ClnA"~\ \)..\ 8''1&1) ~~(>.n ?6-.\ty1cr 435 b 16 Xt2.l -r;.."c:r ~"tlIJ,,~ Invoice Address: Invoice Contact & Phone: Purchase Order: Quote/Bottle Order: ~~<.. D,,~;~ ~~ 4:1& blB ~ Special Report/Formats: !l: &U:!l&I1'\7@[)@ ~~®(!iJ~ • Contact ELI prior to . ~~D~ ~( a .... RUSH sample submittal ... .."....--! t'~tJ:a~....;L~_--i .... 0 II) ~ ~ for charges and Cooler IO(.~ .~!D~~~ Q ~ R scheduling-See Q)\' n./\. I J!I> en ro ro <:: w t:.. Instruction Page i\ \ "'" w +--o DW 0 EDD/EDT(Electronic Data) §~~ ~ ~ :f. I ~ . ReceiptTemp o POTWrNWTP Formal: ~«~Iffil~ ~ ~ e u Comments. '3 0 o State: 0 LEVEL IV .... ~HJ,§ (§ \.J ~ E c o Other: 0 NELAC ~~Il§' "'" « :J On Ice: vJ N ::JaJ:ccaJ!l: ~ I-5 z 0.. l!ira \I W "E Custody Seal !6 >1 1 W .{g On Bottle ~ N I---S-AM-P-LE-ID-E-NTI-F-'C-A-Tl-O-N---'-C-OI-'e-c-tio-n---r-Co-II-ecti-'-on---+-Men-A-T-R-1x---i d CJ) m H ~~:~:r( (~: (Name, Location, I nterval, etc,) Date Time Match [V) N 1 MW)"\ n. \Q.~ \S\S ~-W '{.. ~ 2 MW ~ \1· \O!JDIO ~~ b-W 'f. ~ 3 MW ~q 11I.tt -)btb \~05 frvJ "-~ 4 I~W ~o H·t.t-:J.o~ \~ '-.-\J -.j. ~ 5 MW ~ \ 1\-'\-.;1010 \"t36 b-vl1 ~ 5 Mw ~ lI-IO -:lOlo r~·C> f,;-w 'f. ~ 7 MYL ~ H.I()-;l.0lO \~O (.,-w "} ~. 8~:o_~'a~K ~ ~~~ "R~t-~h'\D5C5 10 <=::!I Custody R..r'5uished byl~rin.tt Oate/Tl1)e; -'" Sly"} "~11. / Rooelved by (pnnt): Daleft uno: Signature: R -f'"cN\na-Hollul4l-t. 1I.II-jDJ{) 1I~ ... )~,!J~ eco rd RelinquIShed by {printl' 0 Oatemme: Signature: ..., Received by (print): Dalernme: Signature, MUST be S· ed r-------------------------~~r<rm~~'T~'~~~~'~~I~--~y~TI';~~;I--~~)~----~~'9~~.wro~:------19n Sample Disposal: Return to Client Lab Disposal: .LAA. nC::>:I,( 1.. ' 'ifJ..i fD '1.L.1J In certain circumstances, samples submitted to Energy Laboratories, Inc. may be subcontracted to oth,¥ cern ied laboratories in order to complete the analysis requested. This serves as notice of this possibility, All sub-contract data will be clea~ aled on your analytical report. www.energylab.com EN:RGY _,\HO'V\". OI~IL'G lWI'W.energylab.com AMIytIuI ErclllHf:l SIM, 1151 Helena, MT 877-472-0711 • Billings, MT 800-135-4489 • Caspar, WY 888-235-0515 Gillette, WY 8&&-&86·7175 . Rapid City, SO 888-&12-1225 • College Station, 1X 888-690-2218 ANALYTICAL SUMMARY REPORT February 23, 2011 Denison Mines USA Corp 6425 S Hwy 191 Blanding, UT 84511 WorkorderNo.: Cl0ll0584 Quote ID: C1640 -POC Wells Project Name: Semi Annual Groundwater Energy Laboratories, Inc. Casper WY received the following 7 samples for Denison Mines USA Corp on 11/16/2010 for analysis. Sample 10 Client Sample 10 Collect Date Receive Date Matrix Test Cl 011 0584-001 MW5 11/11 /1 0 1 5 :05 11 /1 6/1 0 Aqueous Metals by ICP/lCPMS, Dissolved Alkalinity QA Calculations Chloride Fluoride Nitrogen, Ammonia Nitrogen, Nitrate + Nitrite pH Gross Alpha minus Rn222 and Uranium Solids, Total Dissolved Sulfate SW8260B VOCs, Standard List C 10110584-002 MW 11 11/11/1012:1511/16/10 Aqueous Same As Above C 10110584-003 MW 15 11/11/10 11 :30 11/16/10 Aqueous Same As Above C 1 011 0584-004 MW 27 11/12/10 12 :20 11/16/10 Aqueous Same As Above C 10110584-005 MW 28 11/1 2/1 0 11 :35 11/16/10 Aqueous Same As Above C 1011 0584-006 Trip Blank 11/12/10 12:20 11/16/10 Aqueous SW8260B VOCs, Standard List C 10110584-007 Temp Blank 11/12/10 12 :20 11/16/10 Aqueous Temperature This report was prepared by Energy Laboratories, Inc., 2393 Salt Creek Hwy., Casper, WY 82601. Any exceptions or problems with the analyses are noted in the Laboratory Analy1ical Report, the QA/QC Summary Report, or the Case Narrative. The results as reported relate only to the item(s) submitted for testing. If you have any questions regarding these test results, please call. Report Approved By: c3¥~ £) tJtJ.~ Reporting Supervisor Digitally signed by Stephanie Waldrop Date: 2011.02.23 14:15:35 -07:00 Page 1 of 32 www.energylab.com AM/yIiMEn.u-SM /152 Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gilletts WY 866-&86-7115 • Ra id C' SO 888-&72-1225 • Colle e Station TX 888-690-2218 CLIENT: Denison Mines USA Corp Project: Semi Annual Groundwater Sample Delivery Group: C 10110584 REVISED/SUPPLEMENTAL REPORT Revised Date: 02/23/11 Report Date: 12/08/10 CASE NARRATIVE The attached analytical report has been revised from a previously submitted report due to the request by Kathy Weinel on February 10, 2011 for the reanalysis of Gross Alpha minus Rn & U on all samples. The data presented here is from that recheck analysis. The Gross Alpha minus Uranium and Radon recheck data presented in this report is a result of multiple actions taken by the laboratory in order to meet the client stated goal of 'precision should be less than or equal to 20% of the reported analyte response'. The primary analytical changes include the use of a larger sample volume (2 times) coupled with an increased count time (4 times), which did result in reduced precision values. ORIGINAL SAMPLE SUBMITIAL(S) All original sample submittals have been returned with the data package. SAMPLE TEMPERATURE COMPLIANCE: 4"C (±2"C) Temperature of samples received may not be considered properly preserved by accepted standards. Samples that are hand delivered immediately after collection shall be considered acceptable if there is evidence that the chilling process has begun. GROSS ALPHA ANALYSIS Method 900.0 for gross alpha and gross beta is intended as a drinking water method for low TDS waters. Data provided by this method for non potable waters should be viewed as inconsistent. RADON IN AIR ANALYSIS The desired exposure time is 48 hours (2 days). The time delay in returning the canister to the laboratory for processing should be as short as possible to avoid excessive decay. Maximum recommended delay between end of exposure to beginning of counting should not exceed 8 days. SOIL/SOLID SAMPLES All samples reported on an as received basis unless otherwise indicated. ATRAZINE, SIMAZINE AND PCB ANALYSIS Data for PCBs, Atrazine and Simazine are reported from EPA 525.2. PCB data reported by ELI reflects the results for seven individual Aroclors. When the results for all seven are ND (not detected), the sample meets EPA compliance criteria for PCB monitoring. SUBCONTRACTING ANALYSIS Subcontracting of sample analyses to an outside laboratory may be required. If so, ENERGY LABORATORIES will utilize its branch laboratories or qualified contract laboratories for this service. Any such laboratories will be indicated within the Laboratory Analytical Report. BRANCH LABORATORY LOCATIONS eli-b -Energy Laboratories, Inc. -Billings, MT eli-g -Energy Laboratories, Inc. -Gillette, WY eli-h -Energy Laboratories, Inc. -Helena, MT eli-r -Energy Laboratories, Inc. -Rapid City, SD eli-t -Energy Laboratories, Inc. -College Station, TX CERTIFICATIONS: USEPA: WY00002, Radiochemical WY00937; FL-DOH NELAC: E87641 , Radiochemical E871 017; California: 02118CA; Oregon: WY200001; Utah : 3072350515; Virginia: 00057; Washington: C1903 ISO 17025 DISCLAIMER: The results of this Analytical Report relate only to the items submitted for analysis. ENERGY LABORATORIES, INC. -CASPER,WY certifies that certain method selections contained in this report meet requirements as set forth by the above accrediting authorities. Some results requested by the client may not be covered under these certifications. All analysis data to be submitted for regulatory enforcement should be certified in the sample state of origin. Please verify ELI's certification coverage by visiting www.energylab.com ELI appreciates the opportunity to provide you with this analytical service. For additional information and services visit our web page www.energylab.com. Page 2 of 32 EN:RGY _.\llnf~i'Ic.I~I( !.... www.energylab.com AJutllalEI~SIIIu 1m Helena, MT 117-472-0711 • Billings, MT 100-735-4489 • Casper, WY 888-235-0515 Gillette, WY 816-68&-7175 • Rapid City, SD 888-&72-1225 • CDllege Station, TX 188-&90-221 1 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Report Date: 12/08/10 Project: Semi Annual Groundwater Work Order: C1 0110584 ------------------------------------------------------- Analyte Method: A2320 B Sample 10: MBLK Alkalinity, Total as CaC03 Carbonate as C03 Bicarbonate as HC03 Count Result 3 Method Blank 3 ND 4 Units mg/L mg/L mg/L Sample 10: LCS Laboratory Control Sample Alkalinity, Total as CaC03 206 mg/L Sample 10: C10110584-003AOUP 3 Sample Duplicate Alkalinity, Total as CaC03 362 mg/L Carbonate as C03 ND mg/L Bicarbonate as HC03 Sample 10: C10110584-003AMS Alkalinity, Total as CaC03 Qualifiers: RL -Analyte reporting limit. MOC -Minimum detectable concentration 441 mg/L Sample Matrix Spike 497 mg/L RL %REC Low Limit High Limit Run: MANTECH_101116A Run: MANTECH_101116A 5.0 102 90 110 Run : MANTECH_101116A 5.0 5.0 5.0 Run: MANTECH_101116A 5.0 105 80 120 ND -Not detected at the reporting limit. RPO RPOLImit Qual 1.1 1.1 Batch: R139984 11/16/1 0 16 :56 11 /16/1017:11 11/16/1018:48 10 10 10 11/16/1018:56 Page 15 of 32 EN:RGY ~ ,'\HOI U\IOHIL'S ~. E ~ www.energylab.comHelena,1IT877-472-0711 ·BlllinKs,MTBOO-735-44BI · Casper, WY 888-235-0515 ~ AIuIyIItM ru.u.ae. SiIIU 1m GiIIBlts, WY 816-186-7175 • Rapid City, SD 888-672-1225 • ColisKe Station, 1X 888-&90.2218 ~----------------~----------------------------------------~------------- QAlQC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/08/10 Work Order: Cl 0110584 Client: Denison Mines USA Corp Project: Semi Annual Groundwater Analyte Count Result Units Method: A2540 C Sample 10: MBLK1_101116 Solids, Total Dissolved TDS @ 180 C Method Blank ND mg/L Sample 10: LCS1_101116 Laboratory Control Sample Solids, Total Dissolved TDS @ 180 C 1030 mg/L Sample 10: Cl0110591·001AMS Sample Matrix Spike Solids, Total Dissolved TDS @ 180 C 2310 mg/L Sample ID: Cl0l10591-001AMSO Sample Matrix Spike Duplicate Solids, Total Dissolved TDS @ 180 C 2280 mg/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration RL %REC Low Limit High Limit Run: BAL-l_l01116A 10 Run: BAL-C 101116A 10 103 90 110 Run: BAL-C l01116A 10 102 90 110 Run: BAL-l _101116A 10 101 90 110 ND -Not detected at the reporting limit. RPO RPOLimit Qual Batch: 101116_1_SLDS-TDS-W 11/16/1 0 16: 13 11/16/1016:13 11/16/1016:17 11/16/1016:18 1.3 10 Page 16 of 32 EI\ERGY www.energyl~b.com Helena, MT 877-472-0711 • Billings, MT 800-735-4488 . Casper, WY 888-235-D515 Gillette, WY 8&&-188-7175 • Rapid City, SD 888-672-1225 • College Station, IX 888-680-2218 Af:10J1i,rOJ..tIL~ AMIyfIm £zuIIHa S/itu ,m QAlQC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/08/10 Work Order: C1 011 0584 Client: Denison Mines USA Corp Project: Semi Annual Groundwater Analyte Count Result Units Method: A4S00-CI B Sample 10: MBLK9-101123 Chloride Sample 10: C10110730-00SAMS Chloride Sample 10: C10110730-00SAMSO Chloride Sample 10: LCS3S-101123 Chloride Qualifiers: RL -Analyte reporting limit. MDC - Minimum detectable concentration Method Blank ND mg/L Sample Matrix Spike 231 mg/L Sample Matrix Spike Duplicate 234 mg/L Laboratory Control Sample 3510 mg/L RL %REC Low Limit High Limit Run : TITRATION_1 01123A 0.5 Run: TITRATION_1 01123A 1.0 103 90 110 Run: TITRATION_101123A 1.0 105 90 110 Run: TITRATION_1 01123A 1.0 99 90 110 ND -Not detected at the reporting limit. RPO RPOLimit Qual Batch: 101123-CL-TTR-W 11/23/10 10:40 1.5 11/23/1011 :20 11/23/10 11 :23 10 11/23/1011 :33 Page 17 of 32 EN:RGY www.energylab.com Helena, MT 877-472-0711 • Billings, MT BOO-735-4489 • Casper, WY 888-235-0515 Gillatte, WY 886-186-7175 • Rapid City, SO 888-&72-1225 • College Sialion, TX 888-690-221 a l ~\fjO i./· Il:'" il j AIIMyIIt:M Exr:MIMIa stm;, 1m QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/08/10 Work Order: C1 011 0584 Client: Denison Mines USA Corp Project: Semi Annual Groundwater Analyte Count Result Units Method: A4500-F C Sample 10: MBLK Fluoride Sample 10: LCS Fluoride Sample 10: C10110584-002AMS Fluoride Sample 10: C10110584-002AMSO Fluoride Qualifiers: RL -Analyte reporting limit. MDe -Minimum detectable concentration Method Blank ND mg/L Laboratory Control Sample 1.02 mg/L Sample Matrix Spike 1.47 mg/L Sample Matrix Spike Duplicate 1.47 mg/L RL %REC Low limit High Limit RPO RPOLImit Qual Batch: R140025 Run: MANTECH_l01117A 11/17/1009:20 0.05 Run: MANTECH_l 01117 A 11/17/1009:22 0.10 102 90 110 Run: MANTECH_l01117A 11/17/1011:13 0.10 98 80 120 Run: MANTECH_l01117A 11/17/10 11 :20 0.10 98 80 120 0.0 10 ND -Not detected at the reporting limit. Page 18 of 32 www.energylab.com EI\ERGY .... BOI .. J\t GHH !..i ~I ru.fWluSlRc. 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 Gillette, WY 816-&86-7175 • Rapid City, so 888-672-1225 • Collage Station, TX 888-680-2218 Client: Denison Mines USA Corp Project: Semi Annual Groundwater QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/08/10 Work Order: C10110584 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: A4S00-H B Sample 10: ICV1_101116_1 pH Method: A4S00-H B Sample 10: C10110S84-003AOUP pH Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Initial Calibration Verification Standard 6.87 s.u. 0.010 100 Sample Duplicate 7.82 s.u. 0.010 98 Analytical Run: ORION555A-2_1 01116A 11/16/1012:10 102 Run: ORION555A-2_1 01116A 11/16/1013:06 10 0.6 ND -Not detected at the reporting limit. Page 19 of 32 EN:RGY www.energylab.com Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 8&&-&8&-7175 • Rapid City, SO 888-672-1225 • College Station, TX 888-680-2218 • ~'HOI(/\ICf~ll!:" AMIytkM baIIftI:I S1m:. 1m QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/08/10 Work Order: C10110584 Client: Denison Mines USA Corp Project: Semi Annual Groundwater Analyte Count Result Units Method: A4500-NH3 G Sample 10: MBLK-1 Method Blank Nitrogen, Ammonia as N ND mg/L Sample 10: LCS-2 Laboratory Control Sample Nitrogen, Ammonia as N 1.93 mg/L Sample 10: C10110537-003CMS Sample Matrix Spike Nitrogen, Ammonia as N 1.92 mg/L Sample 10: C10110537-003CMSO Sample Matrix Spike Duplicate Nitrogen, Ammonia as N 2.09 mg/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration RL %REC Low Limit High Limit RPO RPOLlmlt Qual Batch: R140044 Run: TECHNICON_1 01117A 11/17/1012:00 0.02 Run: TECHNICON_101117A 11/17/1012:02 0.050 96 90 110 Run: TECHNICON_101117A 11/17/1016:30 0.050 96 80 120 Run: TECHNICON_1 01117A 11/17/1016:32 0.050 104 80 120 8.5 10 ND -Not detected at the reporting limit. Page 20 of 32 EN:RGY .... 1'.l~On/\1 O loll:;' ~ www.energylab.com Alulyt/a/Exu&,u:ISIIc./1IU Helena, MT 877-472-0711 • Billings, MT 800-735-4-489 • Casper, WY 888-235-0515 Gillette, WY B&8-&8&-7175 • Rapid City, SD 888-&72-1225 • College Station, TX 888-&80-2218 Client: Denison Mines USA Corp Project: Semi Annual Groundwater QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/08/10 Work Order: C10110584 Analyte Count Result Units RL %AEC Low Limit High Limit RPO RPOLlmlt Qual Method: A4500-S04 E Sample 10: LCS-1_101130 Sulfate Sample 10: MBLK-1_101130 Sulfate Sample 10: C10110730-004AMS Sulfate Sample 10: C10110730-004AMSO Sulfate Qual ifiers: RL -Analyte reporting limit. MDe -Minimum detectable concentration Laboratory Control Sample 5100 mg/L Method Blank NO mg/L Sample Matrix Spike 3780 mg/L Sample Matrix Spike Duplicate 3750 mg/L Batch: 101130_1_S04-TURB-W Run: TURB-2_1 01130A 11/30/10 11 :06 100 106 90 110 Run: TURB-2_1 01130A 11/30/1011 :08 0.8 Run: TURB-2_101130A 11/30/1011 :50 50 106 90 110 Run: TURB-2_101130A 11/30/1011 :52 50 104 90 110 0.5 10 ND -Not detected at the reporting limit. Page 21 of 32 EN:RGY L ,\lIOfl/\ICHll ~ WI'IW.energylab.com AnlIytIW Cz~ $hrc. lISt Helena, MT877-472-D711 • Billings, MT800-735-44B9 · Casper, WY888-235-0515 Gillette, WY B&&-&8&-7175 • Rapid City, SD 888-672-1225 • CollugB Station, 1X 888-690-221 B QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Report Date: 12/08/1 0 Project: Semi Annual Groundwater Work Order: C1 0110584 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: E200.7 Batch: R140572 Sample 10: MB-101203A 5 Method Blank Run: ICP2-C_101203A 12103/10 12:25 Calcium NO mg/L 0.2 Iron 0.003 mg/L 0.002 Magnesium NO mg/L 0.05 Potassium ND mg/L 0.02 Sodium NO mg/L 0.3 Sample 10: LFB-101203A 5 Laboratory Fortified Blank Run: ICP2-C_101203A 12/03/10 12:29 Calcium 45.9 mg/L 0.50 92 85 115 Iron 0.914 mg/L 0.030 91 85 115 Magnesium 46.7 mg/L 0.50 93 85 115 Potassium 46.5 mg/L 0.50 93 85 115 Sodium 43.8 mg/L 0.50 88 85 115 Sample ID: C10110468-001CMS2 5 Sample Matrix Spike Run: ICP2-C_101203A 12/03/10 14:33 Calcium 190 mg/L 1.0 92 70 130 Iron 1.87 mg/L 0.030 92 70 130 Magnesium 134 mg/L 1.0 92 70 130 Potassium 93.9 mg/L 1.0 87 70 130 Sodium 124 mg/L 1.0 93 70 130 Sample 10: C10110468-001CMSO 5 Sample Matrix Spike Duplicate Run: ICP2-C_101203A 12/03/10 14:37 Calcium 190 mg/L 1.0 92 70 130 0.0 20 Iron 1.91 mg/L 0.030 93 70 130 1.8 20 Magnesium 135 mg/L 1.0 93 70 130 0.9 20 Potassium 91.7 mg/L 1.0 85 70 130 2.4 20 Sodium 126 mg/L 1.0 95 70 130 1.5 20 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MDe -Minimum detectable concentration Page 22 of 32 EN:RGY • ,a.HL :~i'II_J:' ~ www.energylab.com AMlTt/cM EXutmu:. SIMI 1m Helena,lIT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WV 881-235-0515 Gillette, WY 88&-88&-7175 . Rapid City, SD 888-&72-1225 • College Station, IX 888-&80-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/08/10 Work Order: C 1011 0584 Client: Denison Mines USA Corp Project: Semi Annual Groundwater Analyte Count Method: E200.8 Result Sample 10: LRB 17 Method Blank Arsenic NO Beryllium NO Cadmium NO Chromium NO Cobalt NO Copper NO Lead NO Manganese NO Mercury NO Molybdenum SE-05 Nickel NO Selenium NO Thallium NO Tin 0.0002 Uranium NO Vanadium NO Zinc 0.003 Units mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L Sample 10: LFB 17 Laboratory Fortified Blank Arsenic 0.0544 mg/L Beryllium 0.05S5 mg/L Cadmium 0.0533 mg/L Chromium 0.0528 mg/L Cobalt 0.0521 mg/L Copper 0.0511 mg/L Lead 0.0529 mg/L Manganese 0.0530 mg/L Mercury 0.00545 mg/L Molybdenum 0.0535 mg/L Nickel 0.0515 mg/L Selenium 0.0553 mg/L Thallium 0.0530 mg/L Tin 0.0543 mg/L Uranium 0.0555 mg/L Vanadium 0.0525 mg/L Zinc 0.0527 mg/L Sample 10: C10110491-004BMS4 17 Sample Matrix Spike Arsenic 0.0524 mg/L Beryllium 0.0495 mg/L Cadmium 0.0474 mg/L Chromium 0.0504 mg/L Cobalt 0.0489 mg/L Copper 0.0530 mg/L Lead 0.0534 mg/L Qualifiers: RL -Analyte reporting limit. MOC -Minimum detectable concentration RL %REC Low Limit High Limit RPO RPOLImit Qual Batch: R140133 Run: ICPMS2-C_101119A 11/19/10 11 :5S SE-05 3E-05 1E-05 4E-OS 2E-OS 7E-OS 3E-OS 5E-OS 8E-OS 5E-OS 0.0007 0.0002 1E-05 SE-05 1E-OS 3E-05 0.0003 Run: ICPMS2-C_101119A 11/19/1014:51 0.0010 109 85 115 0.0010 113 85 115 0.0010 107 85 115 0.0010 10S 85 115 0.0010 104 85 115 0.0010 102 85 115 0.0010 10S 85 115 0.0010 10S 85 115 0.0010 109 85 115 0.0010 107 85 115 0.0010 103 85 115 0.0010 111 85 115 0.0010 lOS 85 115 0.0010 108 85 115 0.00030 111 85 115 0.0010 105 85 115 0.0010 100 85 115 Run : iCPMS2-C_101119A 11/19/1022:41 0.0010 103 70 130 0.010 99 70 130 0.010 95 70 130 0.050 100 70 130 0.010 98 70 130 0.010 98 70 130 0.050 107 70 130 NO -Not detected at the reporting limit. Page 23 of 32 EN:RGY .lI.fh..lPi\I OHIl-G www.enefgyl~b.com AtuIyIkM rzc.u.-smc, IISZ Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 881-235-0515 Gillette, WY 866-886-7175 • Rapid City, SD 888-&72-1225 • College Station, TX 888-&90-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Report Date: 12/08/10 Project: Semi Annual Groundwater Work Order: C10110584 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLlmlt Qual Method: E200.B Batch: R140133 Sample 10: C10110491-004BMS4 17 Sample Matrix Spike Run: ICPMS2-C_101119A 11/19/1022:41 Manganese 0.0615 mg/L 0.010 99 70 130 Mercury 0.00515 mglL 0.0010 103 70 130 Molybdenum 0.0558 mg/L 0.0010 111 70 130 Nickel 0.0508 mg/L 0.050 98 70 130 Selenium 0.0466 mg/L 0.0010 90 70 130 Thallium 0.0522 mg/L 0.0010 104 70 130 Tin 0.0544 mg/L 0.0010 109 70 130 Uranium 0.0571 mg/L 0.00030 114 70 130 Vanadium 0.0516 mg/L 0.0010 103 70 130 Zinc 0.0471 mg/L 0.010 90 70 130 Sample 10: C10110491-004BMSO 17 Sample Matrix Spike Duplicate Run: ICPMS2-C_l01119A 11/19/1022:48 Arsenic 0.0527 mg/L 0.0010 104 70 130 0.6 20 Beryllium 0.0501 mg/L 0.010 100 70 130 1.3 20 Cadmium 0.0473 mg/L 0.010 95 70 130 0.3 20 Chromium 0.0510 mg/L 0.050 101 70 130 1.1 20 Cobalt 0.0491 mg/L 0.010 98 70 130 0.4 20 Copper 0.0532 mg/L 0.010 98 70 130 0.5 20 Lead 0.0535 mg/L 0.050 107 70 130 0.1 20 Manganese 0.0617 mg/L 0.010 100 70 130 0.3 20 Mercury 0.00528 mg/L 0.0010 105 70 130 2.4 20 Molybdenum 0.0561 mg/L 0.0010 112 70 130 0.5 20 Nickel 0.0510 mg/L 0.050 98 70 130 0.4 20 Selenium 0.0461 mg/L 0.0010 89 70 130 1.2 20 Thallium 0.0522 mg/L 0.0010 104 70 130 0.0 20 Tin 0.0550 mg/L 0.0010 110 70 130 1.0 20 Uranium 0.0573 mg/L 0.00030 114 70 130 0.3 20 Vanadium 0.0520 mg/L 0.0010 104 70 130 0.7 20 Zinc 0.0553 mg/L 0.010 106 70 130 16 20 Method: E200.8 Batch: R140588A Sample 10: C10110584-005BMS4 Sample Matrix Spike Run: ICPMS4-C_l01203A 12/04/10 12:25 Silver 0.0172 mg/L 0.010 86 70 130 Sample 10: C101105B4-005BMSO Sample Matrix Spike Duplicate Run: ICPMS4-C_l01203A 12/04/1012:32 Silver 0.0167 mg/L 0.010 84 70 130 2.6 20 Sample 10: LRB Method Blank Run: ICPMS4-C_l01203A 12/03/1013:14 Silver ND mg/L 8E-05 Sample 10: LFB Laboratory Fortified Blank Run: ICPMS4-C_l01203A 12/03/1013:21 Silver 0.0199 mg/L 0.0010 99 85 115 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 24 of 32 EN:RGY www.energylab.com Helena, NT 877-472-0711 • Billings, MT BOO-73S-44B9 • Casper, WY 888-235-0515 Gillette, WY 886-IB6-7175 • Rapid City, SD 188-672-1225 • College Station, 1X 888-&90-2218 ..... r~nOl U\I Unrl ~j AuIJtlul CruUIflC. SiJIC. 1m QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 1 2/08/1 0 Work Order: Cl 011 0584 Client: Denison Mines USA Corp Project: Semi Annual Groundwater Analyte Count Result Units Method: E353.2 Sample 10: MBLK-1 Method Blank Nitrogen, Nitrate+Nitrite as N ND mg/L Sample 10: LCS-2 Laboratory Control Sample Nitrogen, Nitrate+Nitrite as N 2.38 mg/L Sample 10: C10110584-0030MS Sample Matrix Spike Nitrogen, Nitrate+Nitrite as N 2.29 mg/L Sample 10: C10110584-0030MSO Sample Matrix Spike Duplicate Nitrogen, Nitrate+Nitrite as N 2.32 mg/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration RL %REC Low limit High Limit RPO RPOLimit Qual Batch: R140135 Run: TECHNICON_1 01119A 11/19/1011 :51 0.04 Run: TECHNICON_1 01119A 11/19/10 11 :53 0.10 95 90 110 Run: TECHNICON_1 01119A 11/19/1012:46 0.10 107 90 110 Run: TECHNICON_l 01119A 11/19/1 0 12 :48 0.10 109 90 110 1.3 10 ND -Not detected at the reporting limit. Page 25 of 32 EN:RGY ....... '-'JOB/\I OI~IL~j www.energylab.com IMIf*ttI ClutIIw. SII!c. 1m Helena, MT 817-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 866-186-7175 . Rapid City, SD 188-672-1225 . College Station, TX 888-680-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/08/10 Work Order: C1 011 0584 Client: Denison Mines USA Corp Project: Semi Annual Groundwater Analyte Method: E900.1 Sample 10: MB-GA-0395 Gross Alpha minus Rn & U Count Result 3 Method Blank -0.07 Gross Alpha minus Rn & U Precision (±) 0.06 Gross Alpha minus Rn & U MDC 0.1 Units pCi/L pC ilL pC ilL Sample 10: LCS-GA-0395 Gross Alpha minus Rn & U Laboratory Control Sample Sample 10: C11020352-001CMS Gross Alpha minus Rn & U Sample 10: C11020352-001CMSO Gross Alpha minus Rn & U Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration 11.6 pCilL Sample Matrix Spike 20.2 pCilL Sample Matrix Spike Duplicate 20.2 pCi/L RL %REC Low Limit High Limit Run: G542M_110217A Run: G542M_110217A 111 70 130 Run: G542M_110217A 94 70 130 Run: G542M_110217A 94 70 130 NO -Not detected at the reporting limit. RPO RPOLimit Qual 0.2 Batch: GA-0395 02/22/11 22 :32 U 02122/11 22 :32 02/23/11 05 :25 02/23/11 05 :25 17 U -Not detected at minimum detectable concentration Page 26 of 32 EN:RGY l\IJOrV\ICt.:IL ~ www.energylab.com AIu/tfIaI rxr:.u.-SIIIu 1m Helena, t.fT877-472-D711 • Billings, MT 8DO-735-40489 . Casper, WY 888-235-0515 Gillette, WY 8&&-&86-7175 • Rapid City, SD 188-&72-1225 • College Station, TX 888-&80-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Report Date: 12/08/10 Project: Semi Annual Groundwater Work Order: C1 0110584 Analyte Count Result Units RL %REC Low Limit High limit RPO RPOLimit Qual Method: SW8260B Batch: R140278 Sample 10: 112310_LCS_5 16 Laboratory Control Sample Run: SATURNCA_101123A 11/23/10 13:29 Acetone 130 ug/L 20 126 70 130 Benzene 11 ug/L 1.0 109 70 130 Carbon tetrachloride 12 ug/L 1.0 118 70 130 Chloroform 11 ug/L 1.0 114 70 130 Chloromethane 16 ug/L 1.0 157 70 130 S m+p-Xylenes 21 ug/L 1.0 105 70 130 Methyl ethyl ketone 120 ug/L 20 125 70 130 Methylene chloride 11 ug/L 1.0 109 70 130 Naphthalene 10 ug/L 1.0 100 70 130 o-Xylene 11 ug/L 1.0 106 70 130 Toluene 11 ug/L 1.0 110 70 130 Xylenes, Total 32 ug/L 1.0 105 70 130 Surr: 1,2-0ichlorobenzene-d4 1.0 112 BO 120 Surr: Oibromofluoromethane 1.0 99 70 130 Surr: p-Bromofluorobenzene 1.0 108 80 130 Surr: Toluene-d8 1.0 103 80 120 Sample 10: 112310_MBLK3 16 Method Blank Run: SATURNCA_101123A 11/23/1014:47 Acetone NO ug/L 20 Benzene NO ug/L 1.0 Carbon tetrachloride NO ug/L 1.0 Chloroform NO ug/L 1.0 Chloromethane NO ug/L 1.0 m+p-Xylenes NO ug/L 1.0 Methyl ethyl ketone NO ug/L 20 Methylene chloride NO ug/L 1.0 Naphthalene NO ug/L 1.0 o-Xylene NO ug/L 1.0 Toluene NO ug/L 1.0 Xylenes, Total NO ug/L 1.0 Surr: 1,2-0ichlorobenzene-d4 1.0 106 BO 120 Surr: Oibromofluoromethane 1.0 104 70 130 Surr: p-Bromofluorobenzene 1.0 102 BO 120 Surr: Toluene-dB 1.0 101 BO 120 Sample 10: C10110737-001AMS 16 Sample Matrix Spike Run: SATURNCA_101123A 11/23/10 21 :08 Acetone 1200 ug/L 200 125 70 130 Benzene 110 ug/L 10 106 70 130 Carbon tetrachloride 120 ug/L 10 118 70 130 Chloroform 220 ug/L 10 96 70 130 Chloromethane 150 ug/L 10 152 70 130 S m+p-Xylenes 200 ug/L 10 101 70 130 Methyl ethyl ketone 1200 ug/L 200 124 70 130 Methylene chloride 120 ug/L 10 121 70 130 Naphthalene 100 ug/L 10 102 70 130 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MOC -Minimum detectable concentration S -Spike recovery outside of advisory limits. Page 27 of 32 EN:RGY >--,'\l)onl\l a • ..:JlS www.eAefgylab.com AMIytIetII IxufIftt:f fIIIu 1151 Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 86&-186-7175 . Rapid City, SD 188-&72-1225 . ColiegeSlation, 1X 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Report Date: 12/08/1 0 Project: Semi Annual Groundwater Work Order: C1 0110584 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimlt Qual Method: SW8260B Batch: R140278 Sample 10: C10110737-001AMS 16 Sample Matrix Spike Run: SATURNCA_101123A 11/23/10 21 :08 o-Xylene 100 ug/L 10 104 70 130 Toluene 110 ug/L 10 110 70 130 Xylenes, Total 310 ug/L 10 102 70 130 Surr: 1,2-Dichlorobenzene-d4 1.0 106 80 120 Surr: Dibromofluoromethane 1.0 111 70 130 Surr: p-Bromofluorobenzene 1.0 102 80 120 Surr: Toluene-d8 1.0 105 80 120 Sample 10: C10110737-001AMSO 16 Sample Matrix Spike Duplicate Run: SATURNCA_101123A 11/23/10 21 :45 Acetone 1300 ug/L 200 130 70 130 4.4 20 Benzene 110 ug/L 10 112 70 130 5.5 20 Carbon tetrachloride 140 ug/L 10 139 70 130 16 20 S Chloroform 260 ug/L 10 131 70 130 15 20 S Chloromethane 180 ug/L 10 177 70 130 15 20 S m+p-Xylenes 220 ug/L 10 110 70 130 8.7 20 Methyl ethyl ketone 1300 ug/L 200 130 70 130 4.7 20 Methylene chloride 130 ug/L 10 128 70 130 5.8 20 Naphthalene 120 ug/L 10 116 70 130 13 20 o-Xylene 110 ug/L 10 113 70 130 8.1 20 Toluene 110 ug/L 10 110 70 130 0.4 20 Xylenes, Total 330 ug/L 10 111 70 130 8.5 20 Surr: 1,2-Dichlorobenzene-d4 1.0 103 80 120 0.0 10 Surr: Dibromofluoromethane 1.0 111 70 130 0.0 10 Surr: p-Bromofluorobenzene 1.0 105 80 120 0.0 10 Surr: Toluene-d8 1.0 101 80 120 0.0 10 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MDC -Minimum detectable concentration S -Spike recovery outside of advisory limits. Page 28 of 32 EN:RGY ~I\FlOI U\TOHIL~ www.energylab.com ~EtuIIM!c.S/IIC' 1m Helena, MT 877-472-0111 • Billings, MT 800-735-4489 • Casper, W'/888-235-0515 Gillette, WY 8&6-&8&-7175 • Rapid City, SD 888-672-1225 • CDilege Sialion, TX 888-&90-221 B OA/oe Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/08/10 Work Order: C1 0110584 Client: Denison Mines USA Corp Project: Semi Annual Groundwater Analyte Count Method: SW8260B Result Units Sample 10: 23-NoY-10_LCS_4 16 Laboratory Control Sample Acetone 150 ug/L Benzene 9.8 ug/L Carbon tetrachloride 9.9 ug/L Chloroform 11 ug/L Chloromethane 10 ug/L m+p-Xylenes 18 ug/L Methyl ethyl ketone 140 ug/L Methylene chloride 10 ug/L Naphthalene 9.9 ug/L o-Xylene 9.0 ug/L Toluene 10 ug/L Xylenes, Total 27 ug/L Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Sample 10: 23-NoY-10_MBLK_6 16 Method Blank Acetone ND ug/L Benzene ND ug/L Carbon tetrachloride ND ug/L Chloroform ND ug/L Chloromethane ND ug/L m+p-Xylenes ND ug/L Methyl ethyl ketone ND ug/L Methylene chloride ND ug/L Naphthalene ND ug/L o-Xylene ND ug/L Toluene ND ug/L Xylenes, Total ND ug/L Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-8romofluorobenzene Surr: Toluene-d8 Sample 10: C10110625-001BMS 16 Sample Matrix Spike Acetone 1700 ug/L Benzene 110 ug/L Carbon tetrachloride 100 ug/L Chloroform 110 ug/L Chloromethane 100 ug/L m+p-Xylenes 190 ug/L Methyl ethyl ketone 1400 ug/L Methylene chloride 110 ug/L Naphthalene 99 ug/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration RL %REC Low Limit High limit RPO RPOLimit Qual Batch: R140282 Run: GCMS2_101123B 11/23/1012:50 20 150 70 130 S 1.0 98 70 130 1.0 99 70 130 1.0 108 70 130 1.0 104 70 130 1.0 91 70 130 20 138 70 130 S 1.0 102 70 130 1.0 99 70 130 1.0 90 70 130 1.0 101 70 130 1.0 91 70 130 1.0 105 80 120 1.0 120 70 130 1.0 100 80 130 1.0 104 80 120 Run: GCMS2_1 011238 11/23/1014:01 20 1.0 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 1.0 1.0 108 80 120 1.0 109 70 130 1.0 105 80 120 1.0 101 80 120 Run: GCMS2_1 011238 11/23/1021 :25 200 170 70 130 S 10 98 70 130 10 101 70 130 10 111 70 130 10 102 70 130 10 91 70 130 200 144 70 130 S 10 112 70 130 10 97 70 130 ND -Not detected at the reporting limit. S -Spike recovery outside of advisory limits. Page 29 of 32 Er\ERGY , .. , lon:dOI .. ll os www.energylab.com AIuIytIat Ezulln&#l Sira 1151 Helena, MT 877-472-0711 • Billings, MT 800-739-4489 • Casper, WY 888-235-0519 Gillette, WY 8&&-186-7175 • Rapid City, so 888-672-1225 • College Station, 'IX 888-680-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/08/10 Work Order: C1 011 0584 Client: Denison Mines USA Corp Project: Semi Annual Groundwater Analyte Count Method: SW8260B Result Units Sample 10: C1 011 0625-001 BMS o-Xylene 16 Sample Matrix Spike Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Sample 10: C10110625-001BMSO Acetone Benzene Carbon tetrachloride Chloroform Chloromethane m+p-Xylenes Methyl ethyl ketone Methylene chloride Naphthalene o-Xylene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Qualifiers: RL -Analyte reporting limit. 95 ug/L 100 280 ug/L ug/L 16 Sample Matrix Spike Duplicate 1500 ug/L 120 ug/L 100 ug/L 110 ug/L 100 ug/L 200 ug/L 1400 ug/L 110 ug/L 110 ug/L 100 ug/L 110 ug/L 300 ug/L MDC -Minimum detectable concentration RL %REC Low Limit High Limit RPO RPOLimit Qual Batch: R140282 Run: GCMS2_101123B 11/23/1021 :25 10 95 70 130 10 98 70 130 10 93 70 130 1.0 105 80 120 1.0 122 70 130 1.0 100 80 120 1.0 106 80 120 Run: GCMS2_101123B 11/23/1 0 22 :00 200 152 70 130 11 20 S 10 106 70 130 6.4 20 10 103 70 130 1.6 20 10 112 70 130 1.4 20 10 104 70 130 2.7 20 10 95 70 130 4.4 20 200 138 70 130 4.0 20 S 10 112 70 130 0.4 20 10 111 70 130 13 20 10 101 70 130 5.7 20 10 103 70 130 4.5 20 10 97 70 130 4.8 20 1.0 108 80 120 0.0 10 1.0 118 70 130 0.0 10 1.0 100 80 120 0.0 10 1.0 105 80 120 0.0 10 ND -Not detected at the reporting limit. S -Spike recovery outside of advisory limits. Page 30 of 32 EI\ERGY t AI10I-.1/\I U'~II~) www.energyiab.com AMIyt/eI/ElullMMstx. 'IIU Helena, MT 877-472-0711 • Billings, MT 808-735-4489 . Casper, WV 888-235-0515 Gillette, WY 88&-886-7175 · RapId City, SD 888-172-1225 . College Statlon,1X 888-&8D-2218 Workorder Receipt Checklist Denison Mines USA Corp IIIII~IIIIIIIIIIIIIIIIIIIIIIIII~IIIIIIIIIIIIIIIIIII C10110584 Login completed by: Edith McPike Reviewed by: BL2000\hackerman Reviewed Date: 11/17/2010 Shipping container/cooler in good condition? Custody seals intact on shipping container/cooler? Custody seals intact on sample bottles? Chain of custody present? Chain of custody signed when relinquished and received? Chain of custody agrees with sample labels? Samples in proper container/bottle? Sample containers intact? Sufficient sample volume for indicated test? All samples received within holding time? ContainerfTemp Blank temperature: Water -VOA vials have zero heads pace? Water -pH acceptable upon receipt? Contact and Corrective Action Comments: 1 vial for sample MW-28 was received broken Yes 0' Ves 0' Yes 0 Yes 0' Ves 0' Ves 0' Yes 0' Yes 0 Yes 0' Yes 0' 3°C On Ice Yes 0' Yes 0' Date Received: 11/16/2010 Received by: em No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0' No 0 No 0 No 0 No 0 Carrier name: Fed Ex Not Present 0 Not Present 0 Not Present 0' No VOA vials submitted 0 Not Applicable 0 Page 31 of 32 'U OJ co CD w N 0 -w N Chain of Custody and Analytical Request Record Company Name: r ' '. A A ' .t...J enl~ IV \,,{\Q Report Mail Address: PO ~())( gC1\ G\tA"~Ir\~ \AT %4S1 \ Invoice Address: \J ~Go.fW'\ l.. PLEASE PRINT {Provide as much information as po~sible.l Project Name, PWS, Permit, Etc. I Sample Origin ~eJ1\:o.(\(\v-c..\ G-rOW'lcA.M-cr State: U-r Contact Name: Phone/Fax: Email: l(~" r~\".,(.r 4:?0 G.7lJ ~I Invoice Contact & Phone: Purchase Order: 0'"'-~ ; J. ..,.... vr)l;. l..r~5 b78~J Page _l_ of _1_ EPNState Compliance: Yes 0' No 0 Sampler: (Please Print) -Gncr Hoi J,Jai Quote/Bottle Order: Special ReporVFormats: S: &W&l1 \'7@[J@ ~~@l1D§@W@ o ... ~OCll~ ~m;g51ii> ._> 0 >-ro Contact ELI prior to I shr~DY: I RUSH sample submittal 7f1:f [> l( for charges and Cooter lO(s): .. ~I R DDW o POTWNJWTP o State: ___ _ o Other: ___ _ SAMPLE IDENTIFICATION o EDD/EDT(Electronlc Data) Format: ____ _ o LEVEL IV D NELAC Collection Collection (Name, Location. Interval, etc.) Date Time , My.) 5 11-11,).010 ISO':' 2 MW II I HI -;J.o/{) \:l~ 3 tJ..vJ 15 iHI ·:l.DIO 1130 4 }\I\W ';)..7 11-l;t -~Ol () 1~ 5 fVl w ;;.g 11 ·'~10Ia 1135 6 -r;..;~ B\c,..ok : "1t~f BIn.ct. 9 I 10 ~CI)~ lJl~ 0>= ~ 0) U>Ooc: () ..... <CI)I= :i:: o ...... 1 c: or .... iI).$ C:'c ..S) ~ 0.('0 00 -Et?SI~' \j ::::J Q>.!:::Ois za.<l:Ig>o E >1 ~ <1l '" CI) ok ~ MATRIX ~~~ G-vJ b-W G:.-W G-W ~ o x x 'f. )( ~ Custody Record RelinquisheO by (PriM): -)Mnc.r_.~ol\~1...\ 1 \ ~r):~i() 113 D :3::atll1il i..A Reronqulshed bY{prin!): , Oateo'Tlme: SlQl)3ture: -'-./ MUST be Signed Sample Disposal: Return to Client Lab Disposal: 0 w J: 0 ~ ~ Ul UJ en Received by (P"nt): Recefved by (print). Rc:.:e17"P/Ai C '0 C e I U (II c .... ::::J ~ I S .... (II '0 c (II U5 I H DateiTome, DaI9ITI!lIe: scheduling -See Instruction Page Comments: L}at"J)!~: / /'} '1/\ 'lfU/ // Z ,t'LL ('ltd/A Rece'ij>t'T em p ~ °C On Ice: (i) N cu~o::ttt=ea'6 CI On Coole' :-- InlB.ct Y N Signature N Ml tc.h ~ ~ ~ ~ ~ (5) ~ ~ o ~1Y'1t25fij It::::! Siilnall:r'e: Slgn.Me: -Sognalure: In certain circumstances, samples submitted to Energy Laboratories, Inc. may be subcontracted to other certified laboratories In order to complete the analysis requested. This serves as notice of this possibility. All sub-conlract data will be clearly notated on your analytical report. Visit our web site at www.energylab.com for additional information, downloadable fee schedule, forms, and links. EI\ERGY ~ ,l-! ... ' ~ t. I ,;' f_' www.energylab.com ~~Siru'm Helena, PIT 877-472-0711 • Billings, PIT 800-735-4489 • Caspar, WY 888-235-0515 Gillette, WY 8&&-686-7115 • Rapid City, SD 888-672-1225 • College Station, TX 888-&90-2218 ANAL VTICAL SUMMARY REPORT February 23, 2011 Denison Mines USA Corp 6425 S Hwy 191 Blanding, UT 84511 Workorder No.: C 10110730 Quote ID: C1640 -POC Wells Project Name: Semi-Annual Groundwater 2010 Energy Laboratories, Inc. Casper WY received the following 8 samples for Denison Mines USA Corp on 11/19/2010 for analysis. Sample ID Client Sample ID Collect Date Receive Date Matrix Test C1 011 0730-001 MW4 11 /15/10 13 :50 11 /19/10 Aqueous Metals by ICP/ICPMS, Dissolved Alkalinity QA Calculations Chloride Fluoride Nitrogen, Ammonia Nitrogen, Nitrate + Nitrite pH Gross Alpha minus Rn222 and Uranium Solids, Total Dissolved Sulfate SW8260B VOCs, Standard List C 10110730-002 MW 17 11/17/1012:5511119/10 Aqueous Same As Above C 10110730-003 MW 22 11/16/10 12 :35 11/19/10 Aqueous Same As Above C 10110730-004 MW24 11/17/10 08:45 11/19/10 Aqueous Same As Above C 10110730-005 MW 26 11/15/10 13 :02 11/19/10 Aqueous Same As Above C10110730-006 MW2 11/17/1010:00 11/19/10 Aqueous Same As Above C 10110730-007 Trip Blank 11/17/10 12 :55 11 /19/10 Aqueous SW8260B VOCs, Standard List C 10110730-008 Temp Blank 11/17/10 12 :55 11/19/10 Aqueous Temperature This report was prepared by Energy Laboratories, Inc., 2393 Salt Creek Hwy., Casper, WY 82601. Any exceptions or problems with the analyses are noted in the Laboratory Analytical Report, the QA/QC Summary Report, or the Case Narrative. The results as reported relate only to the item(s) submitted for testing. If you have any questions regarding these test results, please call. Report Approved By: cSt:?~ cD cJtJ.~ Reporting Supervisor Digitally signed by Stephanie Waldrop Date: 2011 .02.23 14:22:33 -07:00 Page 1 of 34 www.energylab.com AM/yfic.t buIIfta SIIu /1152 Helens, MT 877-472-0111 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette WY 8&6-&86-7115 • Ra Id CI so 888-672-1225 • Colle e Station TX 888-690-2218 CLIENT: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Sample Delivery Group: C10110730 REVISED/SUPPLEMENTAL REPORT Revised Date: 02/23/11 Report Date: 12/30/10 CASE NARRATIVE The attached analytical report has been revised from a previously submitted report due to the request by Kathy Weinel on February 10, 2011 for the reanalysis of Gross Alpha minus Rn & U on all samples. The data presented here is from that recheck analysis. The Gross Alpha minus Uranium and Radon recheck data presented in this report is a result of multiple actions taken by the laboratory in order to meet the client stated goal of 'precision should be less than or equal to 20% of the reported analyte response'. The primary analytical changes include the use of a larger sample volume (2 times) coupled with an increased count time (4 times), which did result in reduced precision values. ORIGINAL SAMPLE SUBMITTAL(S) All original sample submittals have been returned with the data package. SAMPLE TEMPERATURE COMPLIANCE: 40C (±2"C) Temperature of samples received may not be considered properly preserved by accepted standards. Samples that are hand delivered immediately after collection shall be considered acceptable if there is evidence that the chilling process has begun. GROSS ALPHA ANALYSIS Method 900.0 for gross alpha and gross beta is intended as a drinking water method for low TDS waters. Data provided by this method for non potable waters should be viewed as inconsistent. RADON IN AIR ANALYSIS The desired exposure time is 48 hours (2 days). The time delay in returning the canister to the laboratory for processing should be as short as possible to avoid excessive decay. Maximum recommended delay between end of exposure to beginning of counting shOUld not exceed 8 days. SOIL/SOLID SAMPLES All samples reported on an as received basis unless otherwise indicated. ATRAZINE, SIMAZINE AND PCB ANALYSIS Data for PCBs, Atrazine and Simazine are reported from EPA 525.2. PCB data reported by ELI reflects the results for seven individual Aroclors. When the results for all seven are ND (not detected), the sample meets EPA compliance criteria for PCB monitoring. SUBCONTRACTING ANALYSIS Subcontracting of sample analyses to an outside laboratory may be required. If so, ENERGY LABORATORIES will utilize its branch laboratories or qualified contract laboratories for this service. Any such laboratories will be indicated within the Laboratory Analytical Report. BRANCH LABORATORY LOCATIONS eli-b -Energy Laboratories, Inc. -Billings, MT eli-g -Energy Laboratories, Inc. -Gillette, WY eli-h -Energy Laboratories, Inc. -Helena, MT eli-r -Energy Laboratories, Inc. -Rapid City, SD eli-t -Energy Laboratories, Inc. -College Station, TX CERTIFICATIONS: US EPA: WY00002, Radiochemical WY00937; FL-DOH NELAC: E87641, Radiochemical E871017; California: 02118CA; Oregon: WY200001; Utah: 3072350515; Virginia: 00057; Washington: C1903 ISO 17025 DISCLAIMER: The results of this Analytical Report relate only to the items submitted for analysis. ENERGY LABORATORIES, INC. -CASPER,WY certifies that certain method selections contained in this report meet requirements as set forth by the above accrediting authorities. Some results requested by the client may not be covered under these certifications. All analysis data to be submitted for regulatory enforcement should be certified in the sample state of origin. Please verify ELI's certification coverage by visiting www.energylab.com ELI appreciates the opportunity to provide you with this analytical service. For additional information and services visit our web page www.energylab.com. Page 2 of 34 EN:RGY l .·"lD:'~·\IOrlH ~'" www.energylab.com ~/E.ruu.:.SIIIu 1m Helena, NT 877-472-D711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 8&6-186-7175 • Repid City, so 888-672-1225 • College Station, lX 888-690-221 B QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/30/1 0 Work Order: Cl0ll0730 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Method: A2320 B Sample 10: MBLK Alkalinity, Total as CaC03 Carbonate as C03 Bicarbonate as HC03 Sample 10: LCS Alkalinity, Total as CaC03 Sample 10: Cl0110723-002AMS Alkalinity, Total as CaC03 Sample 10: C10110730-005AOUP Alkalinity, Total as CaC03 Carbonate as C03 Bicarbonate as HC03 Qualifiers: RL -Analyte reporting limit. ------------------ Count Result Units 3 Method Blank 4 mg/L ND mg/L 5 mg/L Laboratory Control Sample 204 mg/L Sample Matrix Spike 431 mg/L 3 Sample Duplicate 341 mg/L ND mg/L 416 mg/L MDC -Minimum detectable concentration RL %REC Low Limit High Limit Run: MANTECH_l01119A Run: MANTECH_l01119A 5.0 100 90 110 Run: MANTECH_l01119A 5.0 103 80 120 Run: MANTECH_l01119A 5.0 5.0 5.0 ND -Not detected at the reporting limit. RPO RPOLImit Qual 0.6 0.6 Batch: R140144 11/19/1015:15 11/19/1015:31 11/19/1016:12 11/19/10 17:24 10 10 10 Page 17 of 34 EN:RGY . 1\}IOIl/d OHH ~; www.energylab.com AM/yIIaI~stm;, 1m Helena, MT 877-472-0711 • Billings, MT 800-731-4489 • Casper, WY 888-235-0515 Gillette, WY 8&6-686-7175 • Rapid City, SD 888-&72-1225 • College Station, TX 888-&90-2218 QA/Qe Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/30/10 Work Order: C1 011 0730 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Method: A2540 C Result Sample 10: MBLK1_101118 Solids, Total Dissolved TDS @ 180 C Method Blank ND Units mg/L Sample 10: LCS1_10111B Laboratory Control Sample Solids, Total Dissolved TDS @ 180 C 999 mg/L Sample 10: C10110730-001AMS Sample Matrix Spike Solids, Total Dissolved TDS@ 180 C 3710 mg/L Sample 10: C10110730-001AMSO Sample Matrix Spike Duplicate Solids, Total Dissolved TDS @ 180 C 3720 mg/L Sample 10: C10110730-006AMS Sample Matrix Spike Solids, Total Dissolved TDS @ 180 C 5240 mg/L Sample 10: C10110730-006AMSO Sample Matrix Spike Duplicate Solids, Total Dissolved TOS @ 180 C 5200 mg/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration RL %REC Low Limit High Limit Run : BAL-1_101119A 10 Run: BAL-1_101119A 10 100 90 110 Run: BAL-1 101119A - 10 103 90 110 Run : BAL-1 _101119A 10 104 90 110 Run: BAL-1_101119A 10 105 90 110 Run: BAL-1 _101119A 10 103 90 110 NO -Not detected at the reporting limit. RPO RPOLlmlt Qual Batch: 101118_1_SLDS-TDS-W 11/19/10 09:03 0.1 0.7 11/19/1009:05 11/19/1014:46 11/19/1014:47 10 11/19/1014:51 11/19/1014:52 10 Page 18 of 34 EN:RGY _ .. ,' JOB/,I OHI[ .; www.energyiab.com Alulyb/~SIIa IW Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WV 888-235-0515 Gillette, WY 886-686-7175 • Rapid City, so 888-672-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/30/10 Work Order: C1 0110730 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: A4500-CI B Sample 10: MBLK9-101123 Chloride Sample 10: C1011073Q-005AMS Chloride Sample 10: C10110730-005AMSO Chloride Sample 10: C10110730-006AMS Chloride Sample 10: C10110730-006AMSO Chloride Sample 10: LCS35-101123 Chloride Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mg/L Sample Matrix Spike 231 mg/L Sample Matrix Spike Duplicate 234 mg/L Sample Matrix Spike 43.4 mg/L Sample Matrix Spike Duplicate 43.4 mg/L Laboratory Control Sample 3510 mg/L RL %REC Low Limit High limit RPO RPOLimlt Qual Batch: 101123-CL-TTR-W Run: TITRATION_101123A 11/23/1010:40 0.5 Run: TITRATION_1 01123A 11/23/10 11 :20 1.0 103 90 110 Run: TITRATION_1 01123A 11/23/10 11 :23 1.0 105 90 110 1.5 10 Run: TITRATION_101123A 11/23/1011 :28 1.0 103 90 110 Run: TlTRATION_101123A 11/23/1011:31 1.0 103 90 110 0.0 10 Run: TITRATION_101123A 11/23/10 11 :33 1.0 99 90 110 ND -Not detected at the reporting limit. Page 19 of 34 EI\ERGY .1\\1,)I U'IG:~IL'!.,; www.energylab.com AM/ffDI~SIJJu 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4488 . Casper, WY 888-235-0515 Gillette, WY 866-18S-7175 • Rapid City, SD 888-672-1225 • College Sialion, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/30/10 Work Order: C 10110730 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Method: A4500-F C Sample 10: MBLK Fluoride Sample 10: LCS Fluoride Sample 10: C10110730-002AMS Fluoride Sample 10: C10110730-002AMSO Fluoride Qualifiers: RL -Analyte reporting limit. Count Result Units Method Blank ND mg/L Laboratory Control Sample 1.04 mg/L Sample Matrix Spike 1.21 mg/L Sample Matrix Spike Duplicate 1.21 mg/L MDC -Minimum detectable concentration RL %REC Low Limit High Limit RPO RPOLimit Qual Batch: R140164 Run: MANTECH_101122A 11/22/1009:58 0.05 Run : MANTECH_101122A 11/22/10 10:02 0.10 104 90 110 Run: MANTECH_101122A 11/22/1011:21 0.10 95 80 120 Run : MANTECH_101122A 11/2211011 :24 0.10 95 80 120 0.0 10 ND -Not detected at the reporting limit. Page 20 of 34 www.energylab.com EN:RGY /\ll OIU,If.)IHL'';' AM/ftJt2I EJ"UIIIC. SlJrc. flU Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 868-188-7175 • Rapid City, SO 888-&72-1225 • College Station, TX 888-&90-2218 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Method: A4S00-H B QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/30/10 Work Order: Cl 011 0730 Result Units Rl %REC Low Limit High Limit RPO RPOLimit Qual Sample 10: ICVC101119_2 pH Initial Calibration Verification Standard Analytical Run: ORION555A-2_1011198 11/19/1014:33 Method: A4S00-H B Sample 10: C10110723-00SAOUP pH Qualifiers: RL -Analyte reporting limit. MOC -Minimum detectable concentration 6.91 S.u. 0.010 101 Sample Duplicate 7.48 S.u. 0.010 98 102 Run: ORION555A-2_1011198 0.3 11/19/10 15 :27 10 NO -Not detected at the reporting limit. Page 21 of 34 EN:RGY ~ /\1 !C>I 1/\1 OI-lH ~; www.energylab.com AMIyIIaI ExuIIenn smu 1m Helena, MT 877-472-0711 • Billings, MT BOO-735-4488 • Casper, WY 888-235-0515 Gillette, WY 866-186-7175 • Rapid City, so 888-572-1225 • College Station, 1X 888-680-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/30/10 Work Order: Cl 0110730 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: A4S00-NH3 G Sample 10: MBLK-l Method Blank Nitrogen, Ammonia as N NO mg/L Sample 10: LCS-2 Laboratory Control Sample Nitrogen, Ammonia as N 1.95 mg/L Sample 10: C10110730-00S0MS Sample Matrix Spike Nitrogen, Ammonia as N 2.73 mg/L Sample 10: C10110730-00S0MSO Sample Matrix Spike Duplicate Nitrogen, Ammonia as N 2.85 mg/L Qualifiers: RL -Analyte reporting limit. MDC - Minimum detectable concentration RL %REC Low Limit High Limit RPO RPOLimit Qual Batch: R140338 Run: TECHNICON_101129A 11/29/1012:31 0.02 Run: TECHNICON_1 01129A 11/29/1012:33 0.050 98 90 110 Run: TECHNICON_101129A 11/29/10 12:45 0.050 112 80 120 Run: TECHNICON_1 01129A 11/29/10 12:47 0.050 118 80 120 4.3 10 ND -Not detected at the reporting limit. Page 22 of 34 EN:RGY ~ I\nOrV\r<.ir~IL ~ www.energylab.com AuJytiuf b:uIIlflt:t SIJIc. 1m Helena, MT877-472-G711 • Billings, MT 800-135-4489 • Casper, WY 888-235-0515 Gillette, WY 868-688-7175 • Rapid City, so 188-672-1225 • College Station, TX 888-690-221 a QA/QC Summary Report Prepared by Casper. WY Branch Revised Date: 02/23/11 Report Date: 12/30/10 Work Order: Cl 011 0730 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: A4S00-S04 E Sample 10: LCS-1_101130 Sulfate Sample 10: MBLK-1_1D1130 Sulfate Sample 10: C1D11073D-DD4AMS Sulfate Sample 10: C1011D73D-DD4AMSO Sulfate Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Laboratory Control Sample 5100 mg/L Method Blank ND mglL Sample Matrix Spike 3780 mg/L Sample Matrix Spike Duplicate 3750 mg/L RL %REC Low Limit High Limit RPO RPOLImit Qual Batch: 101130_1_S04-TURB-W Run: TURB-2_101130A 11/30/10 11 :06 100 106 90 110 Run: TURB-2_101130A 11/30/1011 :08 0.8 Run: TURB-2_1 01130A 11/30/1011 :50 50 106 90 110 Run: TURB-2_1 01130A 11/30/10 11 :52 50 104 90 110 0.5 10 ND -Not detected at the reporting limit. Page 23 of 34 EI\ERGY ,,-\.j )f1 .\I .... :JJ -.i www.energylab.com AMIyIIm~SItIU flU Helena, MT877-472-0711 • Billings, MT 800-735-4488 . Casper, WY 888-235-0515 GiIIBlte, WY 866-186-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-680-2218 QA/QC Summary Report Prepared by Casper. WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Report Date: 12/30/10 Project: Semi-Annual Groundwater 2010 Work Order: C10110730 Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Method: E200.7 Batch: R140655 Sample ID: MB-l01206A 5 Method Blank Run : ICP2-C_l01206A 12/06/10 11 :24 Calcium NO mg/L 0.2 Iron NO mg/L 0.002 Magnesium NO mg/L 0.05 Potassium NO mg/L 0.02 Sodium NO mg/L 0.3 Sample 10: LFB-l01206A 5 Laboratory Fortified Blank Run: ICP2-C_l01206A 12106/10 11 :28 Calcium 49.8 mg/L 0.50 100 85 115 Iron 0.996 mg/L 0.030 100 85 115 Magnesium 51.2 mg/L 0.50 102 85 115 Potassium 43.4 mg/L 0.50 87 85 115 Sodium 48.0 mg/L 0.50 96 85 115 Sample 10: Cl0ll0780-002BMS2 5 Sample Matrix Spike Run: ICP2-C_l01206A 12/06/10 13:26 Calcium 9770 mg/L 46 96 70 130 Iron 196 mg/L 0.31 96 70 130 Magnesium 10200 mg/L 10 95 70 130 Potassium 9270 mg/L 3.9 88 70 130 Sodium 49300 mg/L 58 104 70 130 Sample 10: Cl0ll0780-002BMSD 5 Sample Matrix Spike Duplicate Run: ICP2-C_l01206A 12106/10 13 :30 Calcium 9750 mg/L 46 96 70 130 0.2 20 Iron 197 mg/L 0.31 97 70 130 0.5 20 Magnesium 10300 mg/L 10 96 70 130 1.1 20 Potassium 9240 mg/L 3.9 88 70 130 0.3 20 Sodium 49500 mg/L 58 107 70 130 0.5 20 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MDC - Minimum detectable concentration Page 24 of 34 EN:RGY ,,\I~On',lor~IL~ www.energylab.com AH/JIIt»I bI:.u-I sac. 1152 Helena, MTB77-472-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 Gillette, WY 8&6-186-7175 • Rapid City, SD 888-672-1225 • College Sialion, TX 888-&90-221 8 OA/oe Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/30/10 Work Order: C 10110730 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: E200.8 Sample 10: LRB 3 Method Blank Lead NO mg/L Thallium 3E-05 mg/L Uranium NO mg/L Sample 10: LFB 3 Laboratory Fortified Blank Lead 0.0522 mg/L Thallium 0.0515 mg/L Uranium 0.0526 mg/L Sample 10: C10110756-006BMS4 3 Sample Matrix Spike Lead 0.0518 mg/L Thallium 0.0523 mg/L Uranium 0.215 mg/L Sample 10: C10110756-006BMSO 3 Sample Matrix Spike Duplicate Lead 0.0546 mg/L Thallium 0.0548 mg/L Uranium 0.223 mg/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration RL %REC Low Limit High Limit RPO RPOLimit Qual Batch: R140766 Run: ICPMS2-C_101209B 12/09/10 21 :06 3E-05 1E-05 1E-05 Run: ICPMS2-C_101209B 12/09/10 21 :12 0.0010 104 85 115 0.0010 103 85 115 0.00030 105 85 115 Run: ICPMS2-C_101209B 12/10/1003:43 0.050 104 70 130 0.0010 105 70 130 0.00030 111 70 130 Run: ICPMS2-C_101209B 12/10/10 03:50 0.050 109 70 130 5.4 20 0.0010 110 70 130 4.7 20 0.00030 127 70 130 3.6 20 NO -Not detected at the reporting limit. Page 25 of 34 EN:RGY _~'l-.?OI~1\ 1 CJJIL!..i www.energylab.com AMIyIIt:M~smc. IW Helena, MT877-472-0711 • BIllings, MT 800-735-4489 . Casper, WY 888-235-0515 Gillette, WY 8&6-186-7175 • Rapid City, so 888-672-1225 • Coliege Sialion, IX 888-&80-2218 OA/oe Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/30/10 Work Order: Cl 011 0730 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Method: E200.8 Sample 10: C10110730-005BMS4 Arsenic Beryllium Cadmium Chromium Cobalt Copper Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc Sample 10: C10110730-005BMSO Arsenic Beryllium Cadmium Chromium Cobalt Copper Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc Sample 10: LRB Arsenic Beryllium Cadmium Chromium Cobalt Qualifiers: RL -Analyte reporting limit. Count Result Units 18 Sample Matrix Spike 0.0521 mg/L 0.0420 mg/L 0.0486 mg/L 0.0515 mg/L 0.0579 mg/L 0.0487 mg/L 0.0529 mg/L 1.12 mg/L 0.00472 mg/L 0.0509 mg/L 0.0560 mg/L 0.0536 mg/L 0.0169 mg/L 0.0528 mg/L 0.0354 0.0832 0.0512 0.0445 mg/L mg/L mg/L mg/L 18 Sample Matrix Spike Duplicate 0.0521 mg/L 0.0402 mg/L 0.0487 mg/L 0.0498 mg/L 0.0581 mg/L 0.0474 mg/L 0.0522 mg/L 1.11 mg/L 0.00471 mg/L 0.0537 mg/L 0.0543 mg/L 0.0546 mg/L 0.0163 mg/L 0.0519 mg/L 0.0390 mg/L 0.0823 mg/L 0.0499 mg/L 0.0426 mg/L 18 Method Blank NO NO NO NO NO mg/L mg/L mg/L mg/L mg/L NO -Not detected at the reporting limit. RL %REC Low limit High Limit 0.0010 0.010 0.010 0.0010 0.010 0.010 0.050 0.010 0.0010 0.0010 0.050 0.0010 0.010 0.0010 0.0010 0.00030 0.0010 0.010 0.0010 0.010 0.010 0.0010 0.010 0.010 0.050 0.010 0.0010 0.0010 0.050 0.0010 0.010 0.0010 0.0010 0.00030 0.0010 0.010 4E-05 3E-05 7E-05 5E-05 lE-05 104 84 97 103 103 97 106 94 99 99 105 84 105 71 109 102 87 104 80 97 100 104 95 104 94 105 96 107 82 104 78 107 99 83 Run: ICPMS4-C_l01129B 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 70 70 70 70 70 70 70 70 70 70 130 130 130 130 130 130 130 130 130 130 130 Run: ICPMS4-C_l01129B 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 70 70 70 70 70 70 70 130 130 130 130 130 130 130 130 Run: ICPMS4-C_l01129B RPO RPOLimlt Qual 0.0 4.4 0.3 3.5 0.4 2.6 1.4 1.3 0.2 5.4 3.1 1.7 3.3 1.6 9.5 1.1 2.5 4.3 Batch: R140353A 11 /30/1005:41 A 11 /30/10 05:48 20 20 20 20 20 20 20 20 A 20 20 20 20 20 20 20 20 20 20 11 /29/10 19:01 A -The analyte level was greater than four times the spike level. In accordance with the method % recovery is not calculated. MOC -Minimum detectable concentration Page 26 of 34 EI\ERGY I\I~Ot .t>..rOHIL~ www.energylab.com Atu/yIIt:M ExuIIwIa st.c. /1152 Helena, MT 877-472-0711 • BIllings, MT 800-735-4489 • Casper, WV 888-235-0515 Gillette, WY 866-&86-7175 • Rapid Ctty, SO 88B-672-1225 • Collega Station, TX 888-680-221 8 QA/Qe Summary Report Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Method: E200.8 Result Sample 10: LRB 18 Method Blank Copper NO Lead NO Manganese NO Mercury 5E-05 Molybdenum NO Nickel NO Selenium NO Silver NO Thallium NO Tin 0.0005 Uranium NO Vanadium NO Zinc 0.005 Prepared by Casper, WY Branch Revised Date: 02123/11 Report Date: 12/30/10 Work Order: C 1 0110730 Units RL %REC Low Limit High Limit RPO RPOLImit Qual Batch: R140353A Run: ICPMS4-C_101129B 11/29/1019:01 mg/L 6E-05 mg/L 2E-05 mg/L 2E-05 mg/L 2E-05 mg/L 8E-05 mg/L 5E-05 mg/L 5E-05 mg/L 8E-05 mg/L 2E-05 mg/L 0.0002 mg/L 8E-06 mg/L 1E-05 mg/L 0.0001 Sample 10: LFB 18 Laboratory Fortified Blank Run: ICPMS4-C_101129B 11/29/10 19:08 Arsenic 0.0519 mg/L 0.0010 104 85 115 Beryllium 0.0539 mg/L 0.0010 108 85 115 Cadmium 0.0524 mg/L 0.0010 105 85 115 Chromium 0.0517 mg/L 0.0010 103 85 115 Cobalt 0.0532 mg/L 0.0010 106 85 115 Copper 0.0523 mg/L 0.0010 105 85 115 Lead 0.0526 mg/L 0.0010 105 85 115 Manganese 0.0525 mg/L 0.0010 105 85 115 Mercury 0.00525 mg/L 0.0010 104 85 115 Molybdenum 0.0502 mg/L 0.0010 100 85 115 Nickel 0.0508 mg/L 0.0010 102 85 115 Selenium 0.0525 mg/L 0.0010 105 85 115 Silver 0.0206 mg/L 0.0010 103 85 115 Thallium 0.0525 mg/L 0.0010 105 85 115 Tin 0.0499 mg/L 0.0010 99 85 115 Uranium 0.0520 mg/L 0.00030 104 85 115 Vanadium 0.0510 mg/L 0.0010 102 85 115 Zinc 0.0543 mg/L 0.0010 98 85 115 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MOC -Minimum detectable concentration Page 27 of 34 EN:RGY I\HOUATOBI( S www.energylab.com AMI/IIM IzuIIftft $Ix. 1m Helena, MT 817-472-0711 • Billings, MT 800-735-4488 • Casper, WY 888-235-0515 Gillette, WY 8&6-&86-7175 . Rapid City, SO 888-672-1225 • Collogs Station, IX 888-&90-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 1 213011 0 Work Order: C 10110730 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: E200.8 Sample 10: C10120061-001CMS4 Mercury Sample 10: C10120061-001CMSO Mercury Sample 10: LRB Mercury Sample 10: LFB Mercury Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Sample Matrix Spike 0.00518 mg/L Sample Matrix Spike Duplicate 0.00520 mglL Method Blank ND mg/L Laboratory Fortified Blank 0.00541 mg/L RL %REC Low Limit High Limit Run: ICPMS4-C_101222A 0.0010 104 70 130 Run: ICPMS4-C_101222A 0.0010 104 70 130 Run: ICPMS4-C_101222A 2E-05 Run: ICPMS4-C_101222A 0.0010 108 85 115 ND -Not detected at the reporting limit. RPO RPOLimit Qual 0.3 Batch: R141221A 12/23/10 15 :35 12/23/10 15 :42 20 12/23/10 13:52 12/23/1013:59 Page 28 of 34 EI\ERGY ._.'\H()rd~l 01 UL~ www.energylab.com AIulytIMEruJINtlSi8C,'151 Helena, MT 877-472-0711 • Billings, MT BOO-735-44BB • Casper, WY 888-235-0515 Gillette, WY 866-68&-7175 • Rapid City, SD 888-672-1225 • Collogo StatiDn, IX 888-680-221 B QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/30/10 Work Order: Cl 0110730 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: E353.2 Sample 10: MBLK-1 Method Blank Nitrogen, Nitrate+Nitrite as N ND mg/L Sample 10: LCS-2 Laboratory Control Sample Nitrogen, Nitrate+Nitrite as N 2.44 mg/L Sample 10: C10110729-0010MS Sample Matrix Spike Nitrogen, Nitrate+Nitrite as N 2.78 mg/L Sample 10: C10110729-0010MSO Sample Matrix Spike Duplicate Nitrogen, Nitrate+Nitrite as N 2.87 mg/L Qualifiers: RL -Analyte reporting limit. MDC - Minimum detectable concentration RL %REC Low Limit High limit RPO RPOLimlt Qual Batch: R140238 Run: TECHNICON_l 01123A 11 /23/1011 :07 0.04 Run: TECHNICON_l 01123A 11 /23/10 11 :09 0.10 98 90 110 Run: TECHNICON_l01123A 11 /23/10 13:07 0.10 98 90 110 Run: TECHNICON_l 01123A 11 /23/1013:09 0.10 103 90 110 3.2 10 ND -Not detected at the reporting limit. Page 29 of 34 EN:RGY L ~\I.()I~A JOr .. Hr!; www.energylab.com AMIyIkM Exa/IatJa Sba 1m Helena, MT 877-472-0711 • Billings, MT 800-731-4488 • Casper, WY 888-235-0515 Gillette, WY 8&&-186-7171 • Rapid City, so 888-&72-1225 • College Sialion, 1X 888-680-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/30/10 Work Order: C10110730 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Method: E900.1 Result Sample 10: MB-GA-0395 3 Method Blank Gross Alpha minus Rn & U -0.07 Gross Alpha minus Rn & U Precision (±) 0.06 Gross Alpha minus Rn & U MDC 0.1 Units pC ilL pC ilL pCi/L Sample 10: LCS-GA-0395 Laboratory Control Sample Gross Alpha minus Rn & U 11.6 pCi/L Sample 10: C11020352-001CMS Sample Matrix Spike Gross Alpha minus Rn & U 20.2 pC ilL Sample 10: C11020352-001CMSO Sample Matrix Spike Duplicate Gross Alpha minus Rn & U 20.2 pCi/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration RL %REC Low LImit High LImit RPO RPOLimit Qual Batch: GA-0395 Run : G542M_110217A 02/22111 22:32 U Run: G542M_110217A 02122111 22:32 111 70 130 Run: G542M_110217A 02123/11 05:25 94 70 130 Run: G542M_110217A 02123/11 05 :25 94 70 130 0.2 17 ND -Not detected at the reporting limit. U -Not detected at minimum detectable concentration Page 30 of 34 EN:RGY , .·,LlDn.\TOI~H ~-; www.energylab.com AIuIyIIaI ExcMIatu:I SfIIc. 1m Helena, MT 877-472-0711 • Billings, MT 800-135-4489 • Casper, WY 888-235-0515 Gillette, WY 8&&-88&-7175 • Rapid City, so 888-&72-1225 • Collage StatlDn, IX 888-&80-221 8 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 12/3011 0 Work Order: C 1011 0730 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Method: SW8260B Result Units Sample 10: 112310_LCS_5 16 Laboratory Control Sample Acetone 130 ug/L Benzene 11 ug/L Carbon tetrachloride 12 ug/L Chloroform 11 ug/L Chlorom ethane 16 ug/L m+p-Xylenes 21 ug/L Methyl ethyl ketone 120 ug/L Methylene chloride 11 ug/L Naphthalene 10 ug/L a-Xylene 11 ug/L Toluene 11 ug/L Xylenes, Total 32 ug/L Surr: l ,2-0ichlorobenzene-d4 Surr: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Sample 10: 112310_MBLKJ 16 Method Blank Acetone NO ug/L Benzene NO ug/L Carbon tetrachloride NO ug/L Chloroform NO ug/L Chloromethane NO ug/L m+p-Xylenes NO ug/L Methyl ethyl ketone NO ug/L Methylene chloride NO ug/L Naphthalene NO ug/L a-Xylene NO ug/L Toluene NO ug/L Xylenes, Total NO ug/L Surr: 1,2-0ichlorobenzene-d4 Surr: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Sample 10: C10110737-001AMS 16 Sample Matrix Spike Acetone 1200 ug/L Benzene 110 ug/L Carbon tetrachloride 120 ug/L Chloroform 220 ug/L Chloromethane 150 ug/L m+p-Xylenes 200 ug/L Methyl ethyl ketone 1200 ug/L Methylene chloride 120 ug/L Naphthalene 100 ug/L Qualifiers: RL -Analyte reporting limit. MOC -Minimum detectable concentration RL %REC Low Limit High Limit RPO RPOLimlt Qual Batch: R140278 Run: SATURNCA_l01123A 11 /23/1013:29 20 126 70 130 1.0 109 70 130 1.0 118 70 130 1.0 114 70 130 1.0 157 70 130 S 1.0 105 70 130 20 125 70 130 1.0 109 70 130 1.0 100 70 130 1.0 106 70 130 1.0 110 70 130 1.0 105 70 130 1.0 112 80 120 1.0 99 70 130 1.0 108 80 130 1.0 103 80 120 Run: SATURNCA_l01123A 11/23/1014:47 20 1.0 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 1.0 1.0 106 80 120 1.0 104 70 130 1.0 102 80 120 1.0 101 80 120 Run: SATURNCA_101123A 11/23/10 21 :08 200 125 70 130 10 106 70 130 10 118 70 130 10 96 70 130 10 152 70 130 S 10 101 70 130 200 124 70 130 10 121 70 130 10 102 70 130 NO -Not detected at the reporting limit. S -Spike recovery outside of advisory limits. Page 31 of 34 EN:RGY . :"HOB",I CHE !3 , . www.energylab.com AMIytIM~Siru 1m Helena, MTB77-472-0711 • Billings, MT800-739-4489 . Casper, WY888-235-D515 Gillette, WY 88&-188-7175 • Rapid City, so IB8-672-1225 • College Station, TX 888-&90-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Report Date: 12/30/10 Project: Semi-Annual Groundwater 2010 Work Order: C10110730 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: SW8260B Batch: R140278 Sample 10: C10110737-001AMS 16 Sample Matrix Spike Run: SATURNCA_101123A 11/23/10 21 :08 o-Xylene 100 ug/L 10 104 70 130 Toluene 110 ug/L 10 110 70 130 Xylenes, Total 310 ug/L 10 102 70 130 Surr: 1,2-Dichlorobenzene-d4 1.0 106 80 120 Surr: Dibromofluoromethane 1.0 111 70 130 Surr: p-Bromofluorobenzene 1.0 102 80 120 Surr: Toluene-d8 1.0 105 80 120 Sample 10: C10110737-001AMSO 16 Sample Matrix Spike Duplicate Run: SATURNCA_101123A 11/2311 0 21 :45 Acetone 1300 ug/L 200 130 70 130 4.4 20 Benzene 110 ug/L 10 112 70 130 5.5 20 Carbon tetrachloride 140 ug/L 10 139 70 130 16 20 S Chloroform 260 ug/L 10 131 70 130 15 20 S Chloromethane 180 ug/L 10 177 70 130 15 20 S m+p-Xylenes 220 ug/L 10 110 70 130 8.7 20 Methyl ethyl ketone 1300 ug/L 200 130 70 130 4.7 20 Methylene chloride 130 ug/L 10 128 70 130 5.8 20 Naphthalene 120 ug/L 10 116 70 130 13 20 o-Xylene 110 ug/L 10 113 70 130 8.1 20 Toluene 110 ug/L 10 110 70 130 0.4 20 Xylenes, Total 330 ug/L 10 111 70 130 8.5 20 Surr: 1,2-Dichlorobenzene-d4 1.0 103 80 120 0.0 10 Surr: Dibromofluoromethane 1.0 111 70 130 0.0 10 Surr: p-Bromofluorobenzene 1.0 105 80 120 0.0 10 Surr: Toluene-d8 1.0 101 80 120 0.0 10 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MDC -Minimum detectable concentration S -Spike recovery outside of advisory limits. Page 32 of 34 EN:RGY l I\U(JBAI LiI~1l !..; ~-www.ehergylab.com ~ AII.1yb1 m.IIrtIu SIne, 1151 Helena, MT 177-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 18&-186-7175 • Rapid City, so 188-672-1225 • College StatiDII, 1X 881-680-2218 Workorder Receipt Checklist Denison Mines USA Corp III~II ~IIIIIIIIIIIIIIII ~III ~lllllllllill ~IIIIII C10110730 Login completed by: Edith McPike Reviewed by: BL2000\alynch Reviewed Date: 12/2/2010 Shipping container/cooler in good condition? Custody seals intact on shipping container/cooler? Custody seals intact on sample bottles? Chain of custody present? Chain of custody signed when relinquished and received? Chain of custody agrees with sample labels? Samples in proper container/bottle? Sample containers intact? Sufficient sample volume for indicated test? All samples received within holding time? ContainerlTemp Blank temperature: Water -VOA vials have zero headspace? Water -pH acceptable upon receipt? Contact and Corrective Action Comments: Yes 0' Yes 0' Yes 0 Yes 0' Yes 0' Yes 0' Yes 0' Yes 0' Yes 0' Yes 0' 2°C On Ice Yes 0' Yes 0 Date Received: 11/19/2010 Received by: em No 0 No 0 No 0 NoD No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0' Carrier name: FedEx Not Present 0 Not Present 0 Not Present 0' No VOA vials submitted 0 Not Applicable 0 Sample MW 22 was received with a PH of 5 for metals and radionuclides; 1 ml of HN03 was added to sample in the laboratory Page 33 of 34 'qlll{"Y HfI@IIU.kUlt" Chain of Custody and Analytical Request Record Page_i _of_'_ Company Name:O e.('\ ;~Ol\ M ; r"tes Report Mail Address: PO ~ox go~ BIMJ.it1~ i,}."T" ~o.j.5i1 Invoice AddreSS: S~<. Special Report/Formats: D ow o EOO/EDT(Electronic Data) o POTWNJWTP Format:. ____ _ D State: ___ _ o Other: ___ _ o LEVEL IV o NELAC PLEASE PRINT (Provide as much information as possibleJ. Project Name. PWS, Permit. Etc. 4 I Sample Origin Se.fl"I i6-/IIlIAO--\ &r~J~¢<.r ,?.OK) State: lA, Contact Name: Phone/Fax: Email: R~QJ\ PoJ,.,u 43.5 b7S ~I Invoice Contact & Phone: Do..";~ , .... ,.1< '"1:.\5 (;"7g ~I Purchase Order: EPA/State Compliance: Yes 0 No 0 Sampler: (Please Print) IWln~r ).leI} 1:.\0. (l Quote/Bottle Order: $: ~W@O@ 1JJ~®QD~rn® .1 Contact ELI prior to RUSH sample sUbmittal V a ... ~o ",15 ~CD ;g OI :v ._> 0 >'15 J9(/)(/)<lI :> c: <II en;> 83:15 ~ g> 0 ..... ~(/)~djl:;;C T ~ iD 2 c::'§ ~ ~Q.",o a -p~I~' \J ::lw.=m$: zo..<JljpO ~ E >1 rJ3 ...:l t=' 0 ~ W I "0 () C :J « a I-ro ~ c 5 l- W "E W ell fJ) "0 C ell U5 R for charges and scheduling -See I nstruction Page Comments: U DC On Ice: S Custody Seal On Bonle On Cooler Intact SAMPLE IDENTIFICATION Collection ColI~tion I MATRIX (Name Location, Interval. etc.) Date TIme ~ '3 H SIgnature Match 1 b-~ tJ..vJ Y 1l~i5 ·~rO 13:,<) y. 2 MvJ 17 11-11-.2.010 \lSf> b-\J )t 3 Mw~ H ·14.-~DI() p:~ b-vJ y. 4 P!W ~y \I-li-loIO 08t.t5 b-vJ 'y.. I 5 Mw ~fo 'i'15-~I~ 13o;t 6-vJ 6 MW :l. 11-\7-1.010 lOCO b-W 7 "1C-;~ Blu.n~ :~iV/w~ 'X )( N N N N 10 ~~~~~~~~~~~~~--~~~~ ~ Custody .. :1lMM..... RecelYcd by (pilill); I I QalefTiiOO; ~ Sgnal~J$Z~ ~ Record ~~~~~---1!L16L~~~ Rticelviiif6Y1pnnl): Oillemme· Signature.: aMUSTbe.~------________________________ ~~~==~ __ ~~~~ ____ ~~~ ____ ~ (.oJ SI ed y ~~b . 1.')/, t1 /. naura: .;,. gn Return to Client: ___ _ Lab Disposal: _L'"'7'/7' I -rjlu '1f :;;cJ In certain circumstances, samples submitted to Energy Laboratories. Inc. may be subcontracted to other certified laboratories in order to complete the analysis requested. This serves as notice of this possibility. All sub-contract data will be clearly notated on your analytical report. Visit our web site at www.energylab.com for additional information, downloadable fee schedule. fonns. and links. EN:RGY (\ . >' 'I, ~,I 'i ~ I • www.energylab.com MIIyfII:M IIuIIIIcI.trIrcI ,m Helena, MT 877-412-0711 • Billings, MT 800-735-4489 . Casper, W'{ 111-235-0515 Gllletbl, WY 111-116-1175 • Rapid City, SD 118-172-1225 • College Station, 1X 1 ..... 691-221. ANAL VTICAL SUMMARY REPORT January 06, 2011 Denison Mines USA Corp 6425 S Hwy 191 Blanding, UT 84511 WorkorderNo.: C10110844 Quote ID: C1640 -POC Wells Project Name: Semi-Annual Groundwater 2010 Energy Laboratories, Inc. Casper WY received the following 8 samples for Denison Mines USA Corp on 11/23/2010 for analysis. Sample 10 Client Sample 10 Collect Date Receive Date Matrix Test C1 011 0844-001 MW 1 11/18/1015:15 11/23/10 Aqueous Metals by ICPIICPMS, Dissolved Alkalinity QA Calculations Chloride Fluoride Nitrogen, Ammonia Nitrogen, Nitrate + Nitrite pH Gross Alpha minus Rn222 and Uranium Solids, Total Dissolved Sulfate SW8260B VOCs, Standard List C 1 011 0844-002 MW3 11/19/1009:45 11/23/10 Aqueous Same As Above C1 011 0844-003 MW 12 11/19/1010:08 11/23/10 Aqueous Same As Above C1 011 0844-004 MW 18 11/18/10 11 :40 11/23/10 Aqueous Same As Above C1 011 0844-005 MW 19 11/18/10 14:50 11/23/10 Aqueous Same As Above C 1 011 0844-006 MW70 11/18/10 11 :40 11/23/10 Aqueous Same As Above C 1 011 0844-007 Temp Blank 11/18/10 00:00 11/23/10 Aqueous Temperature C 1 011 0844-008 Trip Blank 11/18/1000:00 11/23/10 Aqueous SW8260B VOCs, Standard List This report was prepared by Energy Laboratories, Inc., 2393 Salt Creek Hwy., Casper, WY 82601. Any exceptions or problems with the analyses are noted in the Laboratory Analytical Report, the QAlQC Summary Report, or the Case Narrative. The results as reported relate only to the item{s) submitted for testing. If you have any questions regarding these test results, please call. Report Approved By: c:5i:?~ J) tJtJ.~ Reporting Supervisor Digitally Signed by Stephanie Waldrop Date: 2011.01 .06 10:56:46 -07:00 Page 1 of 36 www.energyfab.com AII/fIIaI EafIai .. 1m Helena, MT 811-412-0111 • 8illinlls, MT 800-135-4489 . Casper, WY 888-235-0515 Gillette WV8&&-&88-7115 . Ra IdCI SO 888-672-1 225 • Colle eStatlon TX 888-69D-2218 CLIENT: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Report Date: 01/06/11 Sample Delivery Group: C1 011 0844 CASE NARRATIVE ORIGINAL SAMPLE SUBMITTAL(S) All original sample submittals have been returned with the data package. SAMPLE TEMPERATURE COMPLIANCE: 4'C (±2'C) Temperature of samples received may not be considered properly preserved by accepted standards. Samples that are hand delivered immediately after collection shall be considered acceptable if there is evidence that the chilling process has begun. GROSS ALPHA ANALYSIS Method 900.0 for gross alpha and gross beta is intended as a drinking water method for low TDS waters. Data provided by this method for non potable waters should be viewed as inconsistent. RADON IN AIR ANALYSIS The desired exposure time is 48 hours (2 days). The time delay in returning the canister to the laboratory for processing should be as short as possible to avoid excessive decay. Maximum recommended delay between end of exposure to beginning of counting should not exceed 8 days. SOIUSOLID SAMPLES All samples reported on an as received basis unless otherwise indicated. ATRAZINE, SIMAZINE AND PCB ANALYSIS Data for PCBs, Atrazine and Simazine are reported from EPA 525.2. PCB data reported by ELI reflects the results for seven individual Aroclors. When the results for all seven are NO (not detected), the sample meets EPA compliance criteria for PCB monitoring. SUBCONTRACTING ANALYSIS Subcontracting of sample analyses to an outside laboratory may be required. If so, ENERGY LABORATORIES will utilize its branch laboratories or qualified contract laboratories for this service. Any such laboratories will be indicated within the Laboratory Analytical Report. BRANCH LABORATORY LOCATIONS eli-b -Energy Laboratories, Inc. -Billings, MT eli-g -Energy Laboratories, Inc. -Gillette, WY eli-h -Energy Laboratories, Inc. -Helena, MT eli-r -Energy Laboratories, Inc. -Rapid City, SO eli-t -Energy Laboratories, Inc. -College Station, TX CERTIFICATIONS: USEPA: WY00002, Radiochemical WY00937; FL-DOH NELAC: E87641, Radiochemical E871 017; California: 02118CA; Oregon: WY200001; Utah: 3072350515; Virginia: 00057; Washington: C1903 ISO 17025 DISCLAIMER: The results of this Analytical Report relate only to the items submitted for analysis. ENERGY LABORATORIES, INC. -CASPER,WY certifies that certain method selections contained in this report meet requirements as set forth by the above accrediting authorities. Some results requested by the client may not be covered under these certifications. All analysis data to be submitted fm regulatory enforcement should be certified in the sample state of origin. Please verify ELI's certification coverage by visiting www.energylab.com ELI appreciates the opportunity to provide you with this analytical service. For additional information and services visit our web page www.energylab.com. Page 2 of 36 EN:RGY ! ;\~·>'.; ... l ;fn ._ www.energylab.com AM(yIIAI CUdIIa .. '151 Helena, MT 877-472-0711 • Billings, MT 801-735-4489 • Caspar, WY 888-235-8515 Gillette, WY 868-186-7175 • Rapid City, SD 888-172-1225 • College Station, 1X 818-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: A2320 B Sample 10: MBLK 3 Method Blank Alkalinity, Total as CaC03 ND mg/L Carbonate as C03 ND mg/L Bicarbonate as HC03 ND mg/L Sample 10: LCS Laboratory Control Sample Alkalinity, Total as CaC03 206 mg/L Sample 10: C10110844-006AOUP 3 Sample Duplicate Alkalinity, Total as CaC03 384 mg/L Carbonate as C03 ND mg/L Bicarbonate as HC03 469 mg/L Sample 10: C10110844-006AMS Sample Matrix Spike Alkalinity, Total as CaC03 518 mg/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Report Date: 01/06/11 Work Order: C10110844 RL %REC Low Limit High Limit Run: MANTECH_101123A Run: MANTECH_101123A 5.0 103 90 110 Run: MANTECH_l01123A 5.0 5.0 5.0 Run: MANTECH_l01123A 5.0 108 80 120 NO -Not detected at the reporting limit. RPO RPOLimit Qual 0.3 0.3 Batch: R140349 11/23/1019:57 11/23/10 20:10 11/23/1020:25 10 10 10 11/23/10 20:34 Page 17 of 36 EN:RGY I t\ t" ) r •• ~ I ~ I <II '" www.energylab.com AHIttIaI~ .. 'IU Helena, MT 871-412-0111 • Billings, MT 800-735-4489 • Casper, WY 881-235-0515 Gillette, WY 11&-888-7175 • Rapid Citv, so 888-672-1225 • CoHege Station, IX 881-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: A2540 C Sample 10: MBLK1_101123 Method Blank Solids, Total Dissolved TDS @ 180 C NO mgIL Sample 10: LCS1_101123 Laboratory Control Sample Solids, Total Dissolved TDS @ 180 C 986 mgIL Sample 10: C10110844-006AMS Sample Matrix Spike Solids, Total Dissolved TDS @ 180 C 5190 mg/L Sample 10: C10110844-006AMSO Sample Matrix Spike Duplicate Solids, Total Dissolved TDS@ 180 C 5160 mg/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Report Date: 01/06/11 Work Order: C 1 011 0844 RL %REC Low Limit High Limit Run: BAL-l_l01123A 10 Run: BAL-l_l01123A 10 99 90 110 Run: BAL-l_101123A 10 102 90 110 Run: BAL-l_l01123A 10 102 90 110 ND -Not detected at the reporting limit. RPO RPOLlmlt Qual Batch: 101123_1_SLDS-TOS-W 11/23/10 16:41 11/23/10 16:41 11/23/10 16:46 11/23/10 16:46 0.6 10 Page 18 of 36 Er\ERGY I f\'''H)!~~''~I~.!H II · www.energylab.com AMIytIaI bu/IIIa SIIJA llU Helena, MT 811-412-0711 • Billings, MT 800-135-4489 • Casper, WV 888-235-0515 Gillette, WV 866-&86-7175 • Rapid City, SD 888-172-1225 • College Stillon, TX 888-690-2218 QAlQC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: A4500-CI B Sample 10: MBLK9-12/15/2010 Chloride Sample 10: C10110928-Q01AMS Chloride Sample 10: C10110928-001AMSO Chloride Sample 10: LCS35-12/15/2010 Chloride Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mg/L Sample Matrix Spike 35.1 mglL Sample Matrix Spike Duplicate 35.5 mg/L Laboratory Control Sample 3580 mg/L Report Date: 01/06/11 Work Order: C1 011 0844 RL %REC Low Limit High limit RPO RPOLimit Qual Batch: 12115/2010-CL-TIR-W Run: TITRATION_101215A 12115/1014:51 0.5 Run: TITRATION_101215A 12115/10 15:33 1.0 99 90 110 Run: TITRATION_101215A 12115/10 15:35 1.0 100 90 110 1.0 10 Run: TITRATION_101215A 12115/10 15:49 1.0 101 90 110 ND -Not detected at the reporting limit. Page 19 of 36 EN:RGY I ~\~iOI.·~",I C~l~1 " www.energylab.com ~&ullMASi1Iu rm Helen., MT 877-472-0711 • Billings, MJ 800-735-4489 • Casper, WY 881-235-0515 Gillette, WY 8&&-&8&-7175 • Rapid City, SD 888-672-1225 • College Station, TX 881-&90-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: A4S00-F C Sample 10: MBLK Fluoride Sample 10: LCS Fluoride Sample 10: C10110B44-00SAMS Fluoride Sample 10: C10110B44-00SAMSO Fluoride Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank NO mg/L Laboratory Control Sample 1.04 mg/L Sample Matrix Spike 2.00 mglL Sample Matrix Spike Duplicate 2.00 mg/L Report Date: 01/06/11 Work Order: C 10110844 RL %REC Low Limit High limit Run: MANTECH_101201A 0.05 Run: MANTECH_101201A 0.10 104 90 110 Run: MANTECH 101201A - 0.10 100 80 120 Run: MANTECH_101201A 0.10 100 80 120 NO -Not detected at the reporting limil. RPO RPOLlmit Qual 0.0 Batch: R140441 12101/1008:44 12101/1008:51 12101/10 10:08 12101/1010:11 10 Page 20 of 36 EI\ERGY I 1\1-101 .... ' .. 1 _'I ~I ~~ www.energylab.com ~EJtuIItIra-. rw Helena, MT 877-472-0111 • Billings, MT 800-735-4489 . Casper, WY 881-235-0515 Gillette, 'I('( 888-888-1175 • Rapid City, so 118-872-1225 • CollegB Station, TX 181-890-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Report Date: 01/06/11 Work Order: C 1 011 0844 Analyte Count Result Units RL %REC Low limit High Limit RPO RPOLimit Qual Method: A4500-H B Sample 10: ICV1_101123_1 pH Method: A4500-H B Sample 10: C1011084~01AOUP pH Method: A4500-H B Sample 10: ICV1_101124_1 pH Method: A4500-H B Sample 10: C10110846-001 BOUP pH Qualifiers: RL -Anaiyte reporting limit. MDC -Minimum detectable concentration Initial Calibration Verification Standard 6.86 S.u. 0.010 100 Sample Duplicate 7.97 S.u. 0.010 Initial Calibration Verification Standard 6.86 S.u. 0.010 100 Sample Duplicate 8.30 S.u. 0.010 98 Analytical Run: ORION555A-2_101123A 11/23/10 15:23 102 Batch: 101123_1_PH-W_555A-2 Run: ORION555A-2_101123A 11/23/1016:26 98 0.1 10 Analytical Run: ORION555A-2_101124A 11/24/10 10:00 102 Batch: 101124_1_PH-W_555A-2 Run: ORION555A-2_101124A 11/24/10 11 :09 0.2 10 ND -Not detected at the reporting limit. Page 21 of 36 EN:RGY , I\q. )P/~I ____ i-l1 • www.energylab.com AIWyIIaI~SIIIu ,m Helena, MT 811-472-0711 • Billings, MT 800-135-4489 • Casper, 'NY 888-235-0515 Gillatta, 'NY 888-888-7175 • Rapid City, SD 888-&72-1225 • College station, IX 888-680-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: A4500-NH3 G Sample 10: MBLK-1 Nitrogen, Ammonia as N Sample 10: LCS-2 Nitrogen, Ammonia as N Sample 10: C10110844-003DMS Nitrogen, Ammonia as N Sample 10: C10110844-0030MSO Nitrogen, Ammonia as N Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mglL Laboratory Control Sample 1.95 mg/L Sample Matrix Spike 2.33 mg/L Sample Matrix Spike Duplicate 2.34 mglL Report Date: 01/06/11 Work Order: C10110844 RL %REC Low limit High limit Run: TECHNICON_101129A 0.02 Run: TECHNICON_1 01129A 0.050 98 90 110 Run: TECHNICON_101129A 0.050 110 80 120 Run: TECHNICON_1 01129A 0.050 111 80 120 ND -Not detected at the reporting limit. RPO RPOLImit Qual 0.4 Batch: R140338 11/29/1012:31 11/29/10 12:33 11/29/10 13:15 11/29/1013:17 10 Page 22 of 36 EN:RGY 1 r 8 <)f-<}\1 =)I~I ~. www.energylab.com AuIybI &uIINu SiIIa rm Helena, MT 811-472-0111 • Billings, MT 800-735~89 . Casper, WY 888-235-0515 Gillatta, WV 866-686-7115 • Rapid City, SD 888-672-1225 • College Station, 1X 888-698-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: A4500-S04 E Sample 10: LCS-C101130 Sulfate Sample 10: MBLK-C101130 Sulfate Sample 10: C10110730-004AMS Sulfate Sample 10: C10110730-004AMSO Sulfate Qualifiers: RL -Analyte reporting limit. MDe -Minimum detectable concentration Laboratory Control Sample 5100 mglL Method Blank NO mg/L Sample Matrix Spike 3780 mg/L Sample Matrix Spike Duplicate 3750 mgIL Report Date: 01/06/11 Work Order: C1 011 0844 RL %REC Low limit High limit RPO RPOLimlt Qual Batch: 101130_1_S04-TURB-W Run: TURB-2_1 01130A 11/30/10 11 :06 100 106 90 110 Run: TURB-2_1 01130A 11/30/1011 :08 0.8 Run: TURB-2_1 01130A 11/30/1011 :50 50 106 90 110 Run: TURB-2_1 01130A 11/30/1011 :52 50 104 90 110 0.5 10 NO -Not detected at the reporting limit. Page 23 of 36 EN:RGY , I\Yl)! ..... " ll~I ' .~ www.enefgytall.com AuIyIIaI £JtuJIMa S/IIU 1m Helena, MT 877-472-0711 • Billinl/s, MT 800-735-4489 • Casper, 'NY 888-235-0515 Gilletta, WY 888-88&-1175 • Rapid City, SD 888-&72-1225 • College Station,"IX 888-&90-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: E200.7 Sample 10: MB-101216A 5 Method Blank Calcium ND mg/L Iron ND mg/L Magnesium ND mg/L Potassium ND mg/L Sodium ND mg/L Sample 10: LFB-101216A 5 Laboratory Fortified Blank Calcium 46.7 mg/L Iron 0.932 mg/L Magnesium 46.5 mg/L Potassium 43.3 mg/L Sodium 46.4 mg/L Sample 10: C10110756-007BMS2 5 Sample Matrix Spike Calcium 228 mg/L Iron 1.92 mg/L Magnesium 109 mglL Potassium 99.4 mg/L Sodium 241 mg/L Sample 10: C10110756-007BMSO 5 Sample Matrix Spike Duplicate Calcium 228 mg/L Iron 1.91 mg/L Magnesium 108 mglL Potassium Sodium Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration 100 mglL 247 mg/L Report Date: 01/06/11 Work Order: C10110844 RL %REC Low Limit High Limit RPO RPOLimit Qual 0.2 0.002 0.05 0.02 0.3 0.50 0.030 0.50 0.50 0.50 1.0 0.030 1.0 1.0 1.0 1.0 0.030 1.0 1.0 1.0 93 93 93 87 93 97 94 95 88 99 97 93 95 89 105 Run: ICP2-C_l01216A Run: ICP2-C_l01216A 85 115 85 115 85 115 85 115 85 115 Run: ICP2-C_l01216A 70 130 70 130 70 130 70 130 70 130 Run: ICP2-C_l01216A 70 130 70 130 70 130 70 130 70 130 ND -Not detected at the reporting limit. 0.0 0.3 0.8 1.0 2.8 Batch: R140994 12116/10 14:49 12116/10 14:53 12116/1015:43 12116/10 15:47 20 20 20 20 20 Page 24 of 36 EI\ERGY I I\'-il )1;,\1 (H--II· • www.energyfab.com ~EXUllltK:lSInu ,m Helena, MT 871-472-0111 • Billings, MT 808-135-4489 • Casper, WY 881-235-0515 Gillette, 'NY 88~&86-1175 • Rapid City, SD 888-872-1225 • College Station, TX 888-890-2218 QAlQC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: E200.7 Sample 10: MB-101227A Calcium Magnesium Potassium Sodium Sample 10: LFB-101227A Calcium Magnesium Potassium Sodium Sample 10: C10120516-003BMS2 Calcium Magnesium Potassium Sodium 4 4 4 Sample 10: C10120516-Q03BMSO 4 Calcium Magnesium Potassium Sodium Qualifiers: RL -Analyte reporting limit. MDC - Minimum detectable concentration Method Blank ND mg/L ND mg/L ND mg/L ND mg/L Laboratory Fortified Blank 49.0 mgIL 48.2 mg/L 48.4 mg/L 47.4 mg/L Sample Matrix Spike 124 mg/L 103 mg/L 91.3 mg/L 205 mg/L Sample Matrix Spike Duplicate 123 mg/L 102 mg/L 91 .9 mg/L 204 mg/L Report Date: 01/06/11 Work Order: C10110844 RL %REC Low Limit High Limit RPO RPOLImit Qual 0.2 0.05 0.02 0.3 0.50 0.50 0.50 0.50 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 98 96 97 95 99 98 88 100 98 96 89 98 Run: ICP2-C_l01227A Run: ICP2-C_l01227A 85 115 85 115 85 115 85 115 Run: ICP2-C_l01227A 70 130 70 130 70 130 70 130 Run: ICP2-C_101227A 70 130 70 130 70 130 70 130 ND -Not detected at the reporting limit. 0.5 1.4 0.7 0.6 Batch: R141265 12127/10 11 :31 12127/10 11 :35 12127/1 0 12:36 12127/1012:40 20 20 20 20 Page 25 of 36 EN:RGY I f\ I I )1 J ~\ I ' ) I-J! ._~ www.energylab.com ~E1UIwaSinu rm Helena, MT 171-472-0711 • Billings, MT 800-135-4419 • Casper, WY 811-235-0515 Gillette, W'f 81&-186-1115 • Rapid City, SD 888-672-1225 • College Statlon,TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: E200.7 Sample 10: MB-101228A 4 Calcium Magnesium Potassium Sodium Sample 10: LFB-101228A 4 Calcium Magnesium Potassium Sodium Sample 10: C10110844-005BMS2 4 Calcium Magnesium Potassium Sodium Sample 10: C10110844-005BMSO 4 Calcium Magnesium Potassium Sodium Qualifiers: RL -Analyte reporting limit. MOC -Minimum detectable concentration Method Blank NO mglL NO mglL ND mg/L NO mgIL Laboratory Fortified Blank 49.5 mglL 49.9 mglL 48.4 mglL 46.5 mg/L Sample Matrix Spike 249 mglL 148 mg/L 92.4 mglL 204 mg/L Sample Matrix Spike Duplicate 248 mg/L 148 mg/L 92.2 mglL 204 mg/L Report Date: 01/06/11 Work Order: C1 011 0844 RL %REC Low Limit High Limit RPO RPOLImit Qual 0.2 0.05 0.02 0.3 0.50 0.50 0.50 0.50 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 99 100 97 93 96 96 86 103 94 96 86 103 Run: ICP2-C_l01228A Run: ICP2-C_l01228A 85 115 85 115 85 115 85 115 Run: ICP2-C_l01228A 70 130 70 130 70 130 70 130 Run: ICP2-C_l01228A 70 130 70 130 70 130 70 130 NO -Not detected at the reporting limit. 0.6 0.1 0.2 0.0 Batch: R141316 12128/10 14:29 12128/10 14:33 12128/10 15:28 12128/1015:32 20 20 20 20 Page 26 of 36 EI\ERGY I 1\~l)lu\I ' H I '+' www.energylab.com ~ &uIIwIt;t $ItJu 1151 Helen., MT 877·472-0711 • Billings, MT 800·735-4489 • Casper, WY 888-235-0515 Gillette, WY 8&&-&8&·1175 • Rapid City, S[J 888·&72·1225 • College Station, 1X 818-&90-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Method: E200.B Sample 10: C10110B70-002BMS4 Arsenic Beryllium Cadmium Chromium Cobalt Copper Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc Count Result Units 18 Sample Matrix Spike 0.256 mg/L 0.185 mg/L 0.221 0.289 0.258 0.247 0.266 0.286 0.0117 0.319 0.267 0.244 0.0464 0.268 0.162 0.306 0.312 0.317 mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mglL mg/L mg/L mg/L mg/L mg/L mg/L mg/L Sample 10: C10110B70-002BMSO 18 Sample Matrix Spike Duplicate Arsenic 0.263 mg/L Beryllium 0.186 mg/L Cadmium Chromium Cobalt Copper Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc 0.222 0.300 0.263 0.252 0.266 0.292 0.00954 0.336 0.277 0.249 0.0442 0.269 0.182 mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 0.307 mg/L 0.330 mg/L 0.319 mg/L Sample 10: LRB Arsenic Beryllium Cadmium Chromium Cobalt 18 Method Blank NO mg/L NO mglL NO mg/L ND mg/L NO mg/L Qualifiers: RL -Analyte reporting limit. MOC -Minimum detectable concentration S -Spike recovery outside of advisory limits. Report Date: 01/06/11 Work Order: C10110844 RL %REC Low Limit High Limit 0.0010 0.010 0.010 0.050 0.010 0.010 0.050 0.010 0.0010 0.10 0.050 0.0010 0.010 0.10 0.10 0.00030 0.10 0.010 0.0010 0.010 0.010 0.050 0.010 0.010 0.050 0.010 0.0010 0.10 0.050 0.0010 0.010 0.10 0.10 0.00030 0.10 0.010 4E-05 3E-05 7E-05 5E-05 lE-05 Run: ICPMS4-C_l01221A 97 70 130 74 70 130 88 114 101 97 106 99 35 109 102 95 46 107 65 107 117 85 100 75 89 118 103 99 106 102 26 116 106 97 44 108 73 107 124 86 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 Run: ICPMS4-C_l01221A 70 130 70 130 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 Run: ICPMS4-C_l01221A ND -Not detected at the reporting limit. R -RPO exceeds advisory limit. RPO RPOLimit Qual 2.5 0.6 0.7 3.7 1.7 2.1 0.0 1.9 20 5.4 3.5 2.0 4.9 0.5 12 0.4 5.5 0.7 Batch: R141190A 1212211013:06 S S S 1212211013:13 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 SR s 12121/1017:14 Page 27 of 36 EI\ERGY 1\~-\nl~J\T CIJl " Helen., MT 877-472-0711 • Billings, MT 800·735-4489 • Casper, WY 888-235·0515 Gillette, WY 886-888·7175 • Rapid City, SD 818·872·1225 • College Station, 1X 888·890·2218 QAlQC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 01/06/11 Project: Semi-Annual Groundwater 2010 Work Order: C10110844 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: E200.8 Batch: R141190A Sample 10: LRB 18 Method Blank Run: ICPMS4-C_101221A 12121/1017:14 Copper NO mg/L 6E-05 Lead NO mg/L 2E-05 Manganese 7E·05 mg/L 2E-05 Mercury NO mg/L 2E-05 Molybdenum NO mg/L 8E-05 Nickel NO mg/L 5E-05 Selenium NO mg/L 5E-05 Silver NO mg/L 8E-05 Thallium NO mg/L 2E-05 Tin 0.0005 mg/L 0.0002 Uranium 4E-05 mg/L 8E-06 Vanadium NO mg/L 1E-05 Zinc 0.005 mg/L 0.0001 Sample 10: LFB 18 Laboratory Fortified Blank Run: ICPMS4-C_101221A 12121/10 17:21 Arsenic 0.0520 mg/L 0.0010 104 85 115 Beryllium 0.0534 mg/L 0.0010 107 85 115 Cadmium 0.0527 mg/L 0.0010 105 85 115 Chromium 0.0520 mg/L 0.0010 104 85 115 Cobalt 0.0534 mg/L 0.0010 107 85 115 Copper 0.0529 mg/L 0.0010 106 85 115 Lead 0.0519 mg/L 0.0010 104 85 115 Manganese 0.0537 mg/L 0.0010 107 85 115 Mercury 0.00499 mg/L 0.0010 100 85 115 Molybdenum 0.0500 mg/L 0.0010 100 85 115 Nickel 0.0526 mg/L 0.0010 105 85 115 Selenium 0.0541 mg/L 0.0010 108 85 115 Silver 0.0209 mg/L 0.0010 104 85 115 Thallium 0.0514 mg/L 0.0010 103 85 115 Tin 0.0502 mg/L 0.0010 99 85 115 Uranium 0.0520 mg/L 0.00030 104 85 115 Vanadium 0.0516 mg/L 0.0010 103 85 115 Zinc 0.0539 mg/L 0.0010 97 85 115 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 28 of 36 EN:RGY 1\' H ,,~,'., ~) i J) .... www.energylab.com A8tyfIaI EIAIIrIa SbIa ,m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 818-235-0515 Gillette, WY 116-686-7175 • Rapid City, SD 118-&72-1225 • Col/elle Statlon,1X 888-690-2218 QAlQC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Method: E200.8 Sample 10: C10120061-D01CMS4 Beryllium Cadmium Cobalt Copper Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Zinc Count Result Units 15 Sample Matrix Spike 0.0520 mg/L 0.0523 mg/L 0.0530 mg/L 0.0550 mg/L 0.0525 mg/L 0.0539 mg/L 0.00410 mg/L 0.0530 mg/L 0.0554 mg/l 0.0503 mg/L 0.0183 mg/L 0.0523 mg/L 0.0452 mg/L 0.0526 mg/l 0.0567 mg/L Sample 10: C10120061-D01CMSO 15 Sample Matrix Spike Duplicate Report Date: 01/06/11 Work Order: C 10110844 RL %REC Low Limit High Limit RPO RPOLimit Qual 0.010 0.010 0.010 0.010 0.050 0.010 0.0010 0.0010 0.050 0.0010 0.010 0.0010 0.0010 0.00030 0.010 104 105 106 109 105 103 82 105 110 101 92 105 90 99 108 Run: ICPMS4-C_101222A 70 130 70 130 70 130 70 130 70 70 70 70 70 70 70 70 70 70 70 130 130 130 130 130 130 130 130 130 130 130 Run: ICPMS4-C _1 01222A Batch: R141221A 12123/10 09:21 Beryllium 0.0511 mg/L 0.010 102 70 130 1.7 0.2 0.0 0.6 1.5 1.5 3.0 3.6 0.5 1.9 2.1 2.3 4.5 1.3 0.4 12123/1009:28 20 Cadmium Cobalt Copper Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Zinc Sample 10: LRB Beryllium Cadmium Cobalt Copper Lead Manganese Mercury Molybdenum Nickel Selenium Silver Qualifiers: Rl -Analyte reporting limit. 0.0524 0.0530 0.0547 0.0533 0.0547 0.00398 0.0549 0.0551 0.0512 0.0180 0.0536 0.0473 0.0533 0.0570 15 Method Blank ND ND 0.00153 ND ND ND ND ND ND ND ND MDC -Minimum detectable concentration mg/l mg/L mg/L mg/L mg/l mg/L mg/L mg/L mg/L mg/L mg/L mg/l mg/L mg/l mg/L mg/L mg/L mg/L mg/L mg/L mg/l mg/L mg/L mg/l mg/l 0.010 0.010 0.010 0.050 0.010 0.0010 0.0010 0.050 0.0010 0.010 0.0010 0.0010 0.00030 0.010 0.00050 0.00050 0.010 0.010 0.0010 0.010 0.00050 0.010 0.020 0.0050 0.010 105 106 108 107 104 80 109 109 102 90 107 95 101 109 70 70 70 70 70 70 70 70 70 70 70 70 70 70 130 130 130 130 130 130 130 130 130 130 130 130 130 130 Run: ICPMS4-C_101222A ND -Not detected at the reporting limit. 20 20 20 20 20 20 20 20 20 20 20 20 20 20 12123/1013:52 Page 29 of 36 E~RGY 1 AHUf.,\.'_I JI :.... www.energyfab.com Au/tfItM~SbIu rm Helena, MT 877-412-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 8&&-&86-7175 • Rapid City, SD 888-&12-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 01/06/11 Project: Semi-Annual Groundwater 2010 Work Order: C 10110844 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: E200.8 Batch: R141221A Sample 10: LRB 15 Method Blank Run: ICPMS4-C_101222A 12123/10 13:52 Thallium NO mg/L 0.00050 Tin NO mg/L 0.10 Uranium NO mg/L 0.00030 Zinc 0.00118 mg/L 0.010 Sample 10: LFB 15 Laboratory Fortified Blank Run: ICPMS4-C_101222A 12123/10 13:59 Beryllium 0.0545 mg/L 0.0010 109 85 115 Cadmium 0.0534 mg/L 0.0010 107 85 115 Cobalt 0.0538 mg/L 0.0010 105 85 115 Copper 0.0553 mg/L 0.0010 111 85 115 Lead 0.0536 mg/L 0.0010 107 85 115 Manganese 0.0564 mg/L 0.0010 113 85 115 Mercury 0.00541 mg/L 0.0010 108 85 115 Molybdenum 0.0515 mg/L 0.0010 103 85 115 Nickel 0.0554 mg/L 0.0010 111 85 115 Selenium 0.0531 mg/L 0.0010 106 85 115 Silver 0.0212 mg/L 0.0010 106 85 115 Thallium 0.0535 mg/L 0.0010 107 85 115 Tin 0.0508 mg/L 0.0010 102 85 115 Uranium 0.0528 mg/L 0.00030 105 85 115 Zinc 0.0577 mg/L 0.0010 113 85 115 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MOC -Minimum detectable concentration Page 30 of 36 EI\ERGY 1 I\QUH,\l:'.1;1I • www.energylab.com ~ExWiIIIa$lnu Jm Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gilletta, W'f 88&-888-7175 • Rapid City, SD 888-812-1225 • College Station,TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: E353.2 Sample 10: MBLK-1 Nitrogen, Nitrate+Nitrite as N Sample 10: LCS-2 Nitrogen, Nitrate+Nitrite as N Sample 10: C10110844-0060MS Nitrogen, Nitrate+Nitrite as N Sample 10: C10110844-0060MSO Nitrogen, Nitrate+Nitrite as N Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mg/L Laboratory Control Sample 2.51 mg/L Sample Matrix Spike 1.89 mg/L Sample Matrix Spike Duplicate 2.06 mg/L Report Date: 01/06/11 Work Order: C10110844 RL %REC Low Limit High Limit RPO RPOLimit Qual Batch: R140299 Run : TECHNICON_101124A 11/24/1012:12 0.04 Run: TECHNICON_101124A 11/24/1012:14 0.10 100 90 110 Run : TECHNICON_101124A 11/24/1014:07 0.10 95 90 110 Run: TECHNICON_1 01124A 11/24/10 14:09 0.10 103 90 110 8.6 10 ND -Not detected at the reporting limit. Page 31 of 36 EN:RGY t ".,OIl) .. f O' .... 1 ~ www.energylab.com AMfIIIaIElUllliaSitlu 1m Halena, MT 877-472-0111 • Billings, MY 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 88&-886-7175 • Rapid City, SI) 888-872-1225 • College Station, 1X 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: E900.1 Sample 10: MB-GA-0377 Gross Alpha minus Rn & U 3 Method Blank 0.4 pCi/L pCi/L pCi/L Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Sample 10: LCS-GA-0377 Gross Alpha minus Rn & U Sample 10: C10110844-006CMS Gross Alpha minus Rn & U Sample 10: C10110844-006CMSO Gross Alpha minus Rn & U Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration 0.6 0.9 Laboratory Control Sample 25.0 pCi/L Sample Matrix Spike 22.9 pCl/L Sample Matrix Spike Duplicate 23.0 pCi/L Report Date: 01/06/11 Work Order: C1 011 0844 RL %REC Low Limit High Limit Run:G5000VV_101201B Run: G5000VV_101201B 93 70 130 Run: G5000VV_101201B 84 70 130 Run:G5000VV_101201B 84 70 130 NO -Not detected at the reporting limit. RPO RPOLimit Qual 0.2 Batch: GA-0377 1210211011 :11 U 1210211011:11 12102110 12:45 1210211012:45 28.7 U -Not detected at minimum detectable concentration Page 32 of 36 EN:RGY I\~Sl)I~I.1 '_11 <ll "_ www.energylab.com AMIytItM rzun.-SInu ,m Helena, MT 871-472-0711 • 81111nls, MT BOO-735-4489 • Casper, WY 888-235-0515 Gillette, WY 88&-888-7175 • Rapid City, so 888-872-1225 • College Station, 1X 888-890-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 01/06/11 Project: Semi-Annual Groundwater 2010 Work Order: C1 0110844 Analyte Count Result Units RL %REC Low limit High Limit RPO RPOLlmlt Qual Method: SW8260B Batch: R140482 Sample 10: 120110_LCS_4 16 Laboratory Control Sample Run: SATURNCA_l01201A 12101/1012:51 Acetone 120 ug/L 20 118 70 130 Benzene 8.0 ug/L 1.0 80 70 130 Carbon tetrachloride 8.6 ug/L 1.0 86 70 130 Chloroform 8.8 ug/L 1.0 88 70 130 Chloromethane 9.1 ug/L 1.0 91 70 130 m+p-Xylenes 17 ug/L 1.0 85 70 130 Methyl ethyl ketone 100 ug/L 20 102 70 130 Methylene chloride 9.3 ug/L 1.0 93 70 130 Naphthalene 8.6 ug/l 1.0 86 70 130 o-Xylene 8.5 ug/L 1.0 85 70 130 Toluene 8.3 ug/L 1.0 83 70 130 Xylenes, Total 25 ug/L 1.0 85 70 130 Surr: 1,2-0ichlorobenzene-d4 1.0 103 80 120 Surr: Oibromofluoromethane 1.0 105 70 130 Surr: p-Bromofluorobenzene 1.0 101 80 130 Surr: Toluene-d8 1.0 98 80 120 Sample 10: 120110_MBLK_6 16 Method Blank Run: SATURNCA_l01201A 12101/10 14:03 Acetone NO ug/L 20 Benzene NO ug/L 1.0 Carbon tetrachloride NO ug/L 1.0 Chloroform NO ug/L 1.0 Chloromethane NO ug/l 1.0 m+p-Xylenes NO ug/L 1.0 Methyl ethyl ketone NO ugIL 20 Methylene chloride NO ug/L 1.0 Naphthalene NO ug/L 1.0 o-Xylene NO ug/L 1.0 Toluene NO ug/L 1.0 Xylenes, Total NO ug/L 1.0 Surr: 1,2-0ichlorobenzene-d4 1.0 96 80 120 Surr: Oibromofluoromethane 1.0 100 70 130 Surr: p-Bromofluorobenzene 1.0 97 80 120 Surr: Toluene-d8 1.0 93 80 120 Sample ID: C10110870-003EMS 16 Sample Matrix Spike Run: SATURNCA_l01201A 12101/1020:16 Acetone 1100 ug/L 200 112 70 130 Benzene 100 ugIL 10 103 70 130 Carbon tetrachloride 110 ug/L 10 106 70 130 Chloroform 110 ug/L 10 108 70 130 Chloromethane 110 ug/L 10 107 70 130 m+p-Xylenes 210 ug/L 10 104 70 130 Methyl ethyl ketone 1000 ug/L 200 104 70 130 Methylene chloride 100 ug/L 10 102 70 130 Naphthalene 100 ug/L 10 104 70 130 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MOC -Minimum detectable concentration Page 33 of 36 EI\ERGY ,i\I-10PJ\I Dr1'i 'J. www.energylab.com AuIy/kM bUIIMu smc. 1m Helens, MT 871-412-0711 • Billings, MT 800-735-4489 • Casper, WY 881-235-0515 Gilletta, WY 885-888-1175 • Rapid City, SI) 888-612-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 01/06/11 Project: Semi-Annual Groundwater 2010 Work Order: C1 011 0844 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: SW8260B Batch: R140482 Sample 10: C10110870-o03EMS 16 Sample Matrix Spike Run: SATURNCA_101201A 12101/1020:16 o-Xylene 100 ug/L 10 102 70 130 Toluene 110 ug/L 10 107 70 130 Xylenes, Total 310 ug/L 10 103 70 130 Surr: 1,2-Dichlorobenzene-d4 1.0 102 80 120 Surr: Dibromofluoromethane 1.0 103 70 130 Surr: p-Bromofluorobenzene 1.0 104 80 120 Surr: Toluene-d8 1.0 100 80 120 Sample 10: C10110870-o03EMSO 16 Sample Matrix Spike Duplicate Run: SATURNCA_101201A 12101110 20:53 Acetone 1200 ugiL 200 119 70 130 6.2 20 Benzene 110 ugiL 10 108 70 130 4.6 20 Carbon tetrachloride 110 ug/L 10 105 70 130 0.4 20 Chloroform 110 ug/L 10 106 70 130 2.2 20 Chloromethane 100 ug/L 10 104 70 130 3.4 20 m+p-Xylenes 210 ug/L 10 104 70 130 0.4 20 Methyl ethyl ketone 1100 ug/L 200 112 70 130 7.4 20 Methylene chloride 110 ug/L 10 106 70 130 3.9 20 Naphthalene 110 ugiL 10 107 70 130 3.4 20 o-Xylene 100 ug/L 10 103 70 130 1.2 20 Toluene 110 ug/L 10 109 70 130 1.5 20 Xylenes, Total 310 ugiL 10 104 70 130 0.1 20 Surr: 1,2-Dichlorobenzene-d4 1.0 103 80 120 0.0 10 Surr: Dibromofluoromethane 1.0 105 70 130 0.0 10 Surr: p-Bromofluorobenzene 1.0 104 80 120 0.0 10 Surr: Toluene-d8 1.0 102 80 120 0.0 10 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 34 of 36 EN:RGY ,...\c-' • '\ I ) ..?ll ') ~" www.Bllergylab.com ~ """EI~SIa 1m Helena, MT 817-472-0111 • Billings, MT 800-735-4489 . Casper, WV 888-235-0515 GIIIBtta, WV 888-188-7175 . Rapid City, SD 888-872-1225 . CoilageStatlon,lX 888-690-2218 Workorder Receipt Checklist Denison Mines USA Corp 111111111111111111111111111111111111111111111111111 ~II C10110844 Login completed by: Halley Ackerman Reviewed by: BL2000\kschroeder Reviewed Date: 12/1/2010 Shipping container/cooler in good condition? Custody seals intact on shipping container/cooler? Custody seals intact on sample bottles? Chain of custody present? Chain of custody signed when relinquished and received? Chain of custody agrees with sample labels? Samples in proper container/bottle? Sample containers intact? Sufficient sample volume for indicated test? All samples received within holding time? ContainerlTemp Blank temperature: Water -VOA vials have zero headspace? Water -pH acceptable upon receipt? Contact and Corrective Action Comments: None Yes 0' Yes 0' Yes 0 Yes 0' Yes 0' Yes 0' Yes 0 Yes 0 Yes 0' Yes 0' 2°C On Ice Yes 0 Yes 0 Date Received: 11/23/2010 Received by: ha No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 Carrier name: FedEx Not Present 0 Not Present 0 Not Present 0 No VOA vials submitted 0 Not Applicable 0 Page 35 of 36 ""U Dl co CD w C'l o -w C'l Chain of Custody and Analytical Request Record Page _I _ of -L C14~grrety .tI·l{lli·liil&~ PLEASE PRINT (Provide as much information as possible.) Company Name: , M:nc.~ Project Nam~ PWS, Permit, Etc. c\ t :J.DID Sample Origin EPA/State Compliance: Let\,son S e."~'" l>\fVHAo\'\ Gr-ov...n. v.)o.: ~ (' State: \A'r" Yes 1&1 No 0 Report Mail Address: PC B~)t. rsoq Contact Name: Phone/Fax: Email: Sampler: (Please Print) B\~"tt~~ V-., ~&..\ i:,11 R ~ P",l rYl< I /..1~5 b78~1 -'-;"tlCl" ~ D 11/ J ~ 'II Invoice Address: Invoice Contact & Phone: \..\~.s Purchase Order: Quote/Bottle Order: SCAtv'l( fJ~~i~ lv.rk ~78 ;42.2) Special Report/Formats: 3;: &W&[1W@D@ ~~@([I~@:@) .. Contact ELI prior to StrA tJ( 0 "-RUSH sample submittal ~o (/)~ [ R for charges and Cooler"1Dtl): . ~m;gOI Q; C scheduling -See ~\ ._> 0 >-ro o DW D EDD/EDT(Electronic Data) ~Cf)~ gj 3;: ~ W Instruction Page 03;:= ~ Cl J: "C Receipt Temp o POTWN.JWTP Format: U c: Comments: u <t~I.Q.!: ::J U A D State: D LEVEL IV '5 ,,-ml~ j ~ e °C "-a;.$ c: ~c 10 ~ c..ctJ 00 c: o Other: D NELAC ~115 ' t-L-On Ice: 0 ~ « ::J ::J Q).~ iii 3;: l-S zo..<tlg>o ~ W "E Custody Seal ~ >1 W 10 On Bottle Y N J en "C ~: en c: On Cooler .2l H Intact en SAMPLE IDENTIFICATION Collection Collection MATRIX Signature 8N (Name, Location, Interval, etc.) Date Time Match 1 AvJ \ IH~·;1.OIO 1~\.5 b.-W )( ~ 2 M.vJ ~ Ii-A ~;l.OIO t>~45 b~vJ ')( ~ 3 MvJ \~ 11.lq~;zoIO IOc)i( b-vJ "" fQJ nnn 4 Mw 18 II-IX-;2.0ID lI~O C:, -\,J he' ~ 5 M.W \l\ 1 H~·;z,olo 11.\50 b-W )< '= ~ 6 MW 7D \\ ·H~-.lOfO HLiD b-W ')c ~ 7 -r"rio &\o..O\( 11-i~ ·;J.OiO ;~ 8 --vrmn ~\CV<\'{ ~h. Ul 0 crM'-{ 9 '.-~ ~ 10 ~ Custody Relinquished it ;1"1); DaleIT'me: J J JI. :'7!Ure: Received by (print): Datemme: Signalure: Record ~~ Ulli ; Q,1l I h2J. -.:2.010 lI~o :)/lNYJr' • Relinquished by (prinl):Q Datemme: SIgl\lJUjte: Received by (print): Dalemme: Signature: MUST be I Sign~ _Sample Disposal~_ 8eturn to Client: ~e<;elViKfl)y .... uurawry: \\,r~ :lG ~(J\ ~M~: Lab Disposal: In certain circumstances, samples submitted to Energy Laboratories, Inc. may be subcontracted to other certified laboratories in order to complete the analysis requested. This serves as notice of this possibility. All sub-contract data will be clearly notated on your analytical report. VISit our web site at www.energylab.com fOf additional infOfmation, downloadable fee schedule, forms, and links. Er\ERGY .\ )J, I f II ' www.energylab.com AMIytieII fxuIHu SInu fm Helena, MT 871·472·0111 • Billings, MT 800·135-4489 • Casper, WY 818-235-0515 Gillette, WY 811-888·1115 • Rapid City, SD 888·&12·1225 • College Station, 1X 888-690-2218 ANAL VTICAL SUMMARY REPORT December 30, 2010 Denison Mines USA Corp 6425 S Hwy 191 Blanding, UT 84511 Workorder No.: C1 011 0870 Quote 10: C1640 -POC Wells Project Name: Semi-Annual Groundwater 2010 Energy Laboratories, Inc. Casper WY received the following 5 samples for Denison Mines USA Corp on 11/24/2010 for analysis. Sample 10 Client Sample 10 Collect Date Receive Date Matrix Test C1 011 0870-001 MW3A 11/22/10 09:40 11/24/10 Aqueous Metals by ICP/ICPMS, Dissolved Alkalinity QA Calculations Chloride Fluoride Nitrogen, Ammonia Nitrogen, Nitrate + Nitrite pH Gross Alpha minus Rn222 and Uranium Solids, Total Dissolved Sulfate SW8260B VOCs, Standard List C 1 011 0870-002 MW20 11/22/10 12:45 11/24/10 Aqueous Same As Above C1 011 0870-003 MW23 11/22/10 10:30 11/24/10 Aqueous Same As Above C10110870-004 Trip Blank 11/22/1000:00 11/24/10 Aqueous SW8260B VOCs, Standard List C1 011 0870-005 Temp Blank 11/22/10 00:00 11/24/10 Aqueous Temperature This report was prepared by Energy Laboratories, Inc., 2393 Salt Creek Hwy., Casper, WY 82601. Any exceptions or problems with the analyses are noted in the Laboratory Analytical Report, the QA/QC Summary Report, or the Case Narrative. The results as reported relate only to the item(s) submitted for testing. If you have any questions regarding these test results, please call. Report Approved By: c3¥~ £) <JtJ.~ Reporting Supervisor Digitally signed by Stephanie Waldrop Date: 2010.12.30 15:21 :41 ·07:00 Page 1 of 27 www.energylab.com AMJyt/c6I ExuINcI S/iIU II:U Helena, MT 871·412·0111 • Billings, MT 801·135-4489 • Casper, WY 111-235-0515 Glllatte WY 166-686·1175 • Ra Id CI SO 888~612·1225 • Colle e Stallon TX 818-690-2218 CLIENT: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Report Date: 12/30/1 0 Sample Delivery Group: C10110870 CASE NARRATIVE ORIGINAL SAMPLE SUBMITTAL(S) All original sample submittals have been returned with the data package. SAMPLE TEMPERATURE COMPLIANCE: 4"C (±2"C) Temperature of samples received may not be considered properly preserved by accepted standards. Samples that are hand delivered immediately after collection shall be considered acceptable if there is evidence that the chilling process has begun. GROSS ALPHA ANALYSIS Method 900.0 for gross alpha and gross beta is intended as a drinking water method for low TDS waters. Data provided by this method for non potable waters should be viewed as inconsistent. RADON IN AIR ANALYSIS The desired exposure time is 48 hours (2 days). The time delay in returning the canister to the laboratory for processing should be as short as possible to avoid excessive decay. Maximum recommended delay between end of exposure to beginning of counting should not exceed 8 days. SOIUSOLID SAMPLES All samples reported on an as received basis unless otherwise indicated. ATRAZINE, SIMAZINE AND PCB ANALYSIS Data for PCBs, Atrazine and Simazine are reported from EPA 525.2. PCB data reported by ELI reflects the results for seven individual Aroclors. When the results for all seven are ND (not detected), the sample meets EPA compliance criteria for PCB monitoring. SUBCONTRACTING ANALYSIS Subcontracting of sample analyses to an outside laboratory may be required. If so, ENERGY LABORATORIES will utilize its branch laboratories or qualified contract laboratories for this service. Any such laboratories will be indicated within the Laboratory Analytical Report. BRANCH LABORATORY LOCATIONS eli-b -Energy Laboratories, Inc. -Billings, MT eli-g -Energy Laboratories, Inc. -Gillette, WY eli-h -Energy Laboratories, Inc. -Helena, MT eli-r -Energy Laboratories, Inc. -Rapid City, SD eli-t -Energy Laboratories, Inc. -College Station, TX CERTIFICATIONS: USEPA: WY00002, Radiochemical WY00937; FL-DOH NELAC: E87641, Radiochemical E871017; California: 02118CA; Oregon: WY200001; Utah: 3072350515; Virginia: 00057; Washington: C1903 ISO 17025 DISCLAIMER: The results of this Analytical Report relate only to the items submitted for analysis. ENERGY LABORATORIES, INC. -CASPER,WY certifies that certain method selections contained in this report meet requirements as set forth by the above accrediting authorities. Some results requested by the client may not be covered under these certifications. All analysis data to be submitted for regulatory enforcement should be certified in the sample state of origin. Please verify ELI's certification coverage by visiting www.energylab.com ELI appreciates the opportunity to provide you with this analytical service. For additional information and services visit our web page www.energylab.com. Page 2 of 27 EN:RGY /~ " 11· / I ,--J ~ I '. www.energylab.com Autyf/AI~SInu 'lIZ Helen., MT 871-472-0111 • Billings, MT 800-135-4489 • Casper, WY 888-235-0515 Gillette, W'( 886-888-7115 • Rapid City, SD 888-872-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: A2320 B Sample 10: MBLK 3 Method Blank Alkalinity, Total as CaC03 ND mg/L Carbonate as C03 ND mg/L Bicarbonate as HC03 ND mg/L Sample 10: LCS Laboratory Control Sample Alkalinity, Total as CaC03 206 mg/L Sample 10: Cl0110928-001AOUP 3 Sample Duplicate Alkalinity, Total as CaC03 3.18 mg/L Carbonate as C03 ND mg/L Bicarbonate as HC03 3.88 mg/L Sample 10: C10110928-001AMS Sample Matrix Spike Alkalinity, Total as CaC03 134 mg/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration RL O/OREC 5.0 1.0 1.0 5.0 103 5.0 5.0 5.0 5.0 104 Report Date: 12/30/10 Work Order: C1 011 0870 Low Limit High Limit Run: MANTECH_l 01201 B Run: MANTECH_l 01201 B 90 110 Run: MANTECH_l01201B Run: MANTECH_101201B 80 120 RPO RPOLimlt Qual Batch: R140469 12101/10 15:27 12101/10 15:42 12101/1018:28 10 10 10 12101/1018:37 ND -Not detected at the reporting limit. Page 11 of 27 EI\ERGY /'I~')l .. -I r !JI • www.energylab.com AMIyffaI EtuIItta SIta 1m Helen., NT 817-412-071t • Billings, NT 800-135-4489 • Casper, WY 881-235-0515 Gillatta, WV 888-888-1115 • Rapid City, SD 888-672-1225 • College Station, lX 888-&90-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: A2540 C Sample 10: MBLK1_101124 Solids, Total Dissolved TDS @ 180 C Method Blank NO mg/L Sample 10: LCS1_101124 Laboratory Control Sample Solids, Total Dissolved TDS @ 180 C 961 mg/L Sample 10: C10110870-003AMS Sample Matrix Spike Solids, Total Dissolved TDS @ 180 C 5590 mg/L Sample 10: C10110870-003AMSO Sample Matrix Spike Duplicate Solids, Total Dissolved TDS @ 180 C 5590 mg/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Report Date: 12/30/10 Work Order: C1 011 0870 RL %REC Low Limit High Limit Run: BAL-l_l01124C 10 Run: BAL-l_l01124C 10 96 90 110 Run: BAL-1_101124C 10 104 90 110 Run: BAL-1_101124C 10 102 90 110 NO -Not detected at the reporting limit. RPO RPOLlmit Qual Batch: 101124_1_SLDS-TDS-W 11/24/10 15:54 11/24/10 15:55 11/24/10 16:05 11/24/10 16:06 0.1 10 Page 12 of 27 EN:RGY /'I..1,(J;.,d ,..1<J1 • www.energylab.com AIuIyIkM~SIIru 1m Helena, MT B17-412-0111 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY B8&-B88-7175 • Rapid City, SD 888-&72-1225 • Collags Station, 1X 888-&80-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: A4500-CI B Sample 10: MBLK9-12115/2010 Chloride Sample 10: C10110928-001AMS Chloride Sample 10: C10110928-001AMSO Chloride Sample 10: LCS35-12/15/2010 Chloride Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank NO mglL Sample Matrix Spike 35.1 mglL Sample Matrix Spike Duplicate 35.5 mg/L Laboratory Control Sample 3580 mglL Report Date: 12/30/10 Work Order: C 10110870 RL O/OREC Low limit High Limit RPO RPOLimlt Qual Batch: 12115/2010-CL-TIR-W Run: TITRATION_101215A 12115/1014:51 0.5 Run: TITRATION_1 01215A 12115/10 15:33 1.0 99 90 110 Run: TITRATION_101215A 12115/10 15:35 1.0 100 90 110 1.0 10 Run: TITRATION_101215A 12115/10 15:49 1.0 101 90 110 ND -Not detected at the reporting limit. Page 13 of 27 EN:RGY , /,' ~ \ ) , .... " r I" 1 # www.energylab.com AMIytWI~fInu 'lSI Helena, MT 817-412-0111 • Billings, MT 800-735-4489 • Casper, WY 881-235-0515 Gillette, WY 118-188-1115 • Rapid City, SD .18-872-1225 • College Station,1X 881-698-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: A4S00-F C Sample 10: MBLK Fluoride Sample 10: LCS Fluoride Sample 10: Cl0110870-o01AMS Fluoride Sample 10: Cl0ll0870-001AMSO Fluoride Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mg/L Laboratory Control Sample 1.04 mg/L Sample Matrix Spike 2.20 mg/L Sample Matrix Spike Duplicate 2.16 mg/L Report Date: 12/30/10 Work Order: C1 011 0870 RL %REC Low Limit High Limit RPO RPOLimit Qual Batch: R140441 Run: MANTECH_l 01201 A 12101/10 08:44 0.05 Run: MANTECH_l 01201 A 12101/10 08:51 0.10 104 90 110 Run: MANTECH_l 01201 A 12101/1011:14 0.10 92 80 120 Run: MANTECH_l 01201 A 12101/1011 :17 0.10 88 80 120 1.8 10 ND -Not detected at the reporting limit. Page 14 of 27 www.energylab.com EI\ERGY 1\ ,{)I •• ,1 F ... l • AM/yffaI ExuIIHt:I SIIIu ,m Helen., MT 177·472·0711 • Billings, MT 800·735-4489 • Casper, WV 881-235-0515 Gillette, WV 885-886·7175 • Rapid City, SD 888·672·1225 • Collsge Station, TX 888-690-2218 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Method: A4S00-H B QA/QC Summary Report Prepared by Casper, WY Branch Report Date: 12/30/10 Work Order: C10110870 Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Sample 10: ICVC101124_2 pH Initial Calibration Verification Standard Analytical Run: ORION555A-2_1011248 11/24/10 14:05 Method: A4S00-H B Sample 10: C10110871-001AOUP pH Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration 6.80 S.u. 0.010 99 98 102 Batch: 101124_2_PH-W_555A-2 Sample Duplicate Run: ORION555A-2_101124B 11/24/1015:02 8.03 s.u. 0.010 2.3 10 NO -Not detected at the reporting limit. Page 15 of 27 EN:RGY ,'\'--,. )I.~' I 1.11 • www.energylab.com ..,.~ .. rnz Helena, flIT 871·472·0111 • Billings, flIT 800·135-4489 • Casper, WY 888·235·0515 GiliaHa, WY 8&&-&8&·7175 • Rapid City, SD 818·&72·1225 • College Station, IX 8.1·690-2218 QAlQC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: A450G-NH3 G Sample 10: MBLK·1 Nitrogen, Ammonia as N Sample 10: LC5-2 Nitrogen, Ammonia as N Sample 10: C10110867-G07CMS Nitrogen, Ammonia as N Sample 10: C10110867-G07CMSO Nitrogen, Ammonia as N Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank NO mg/L Laboratory Control Sample 1.95 mg/L Sample Matrix Spike 1.94 mg/L Sample Matrix Spike Duplicate 1.93 mgIL Report Date: 12/30/10 Work Order: C10110870 RL %REC Low limit High Limit RPO RPOLImit Qual Batch: R14033B Run: TECHNICON_101129A 11/29/10 12:31 0.02 Run: TECHNICON_1 01129A 11/29/10 12:33 0.050 9B 90 110 Run: TECHNICON_101129A 11/29/1013:47 0.050 97 BO 120 Run: TECHNICON_1 01129A 11/29/10 13:49 0.050 96 BO 120 0.5 10 NO -Not detected at the reporting limit. Page 16 of 27 EI\ERGY AY.)Ju.l HI • www.energylab.com AIJIIyIIaI &uI1M:I .. llU Helena, MT 871-412-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 88&-186-1115 • Rapid City, so 888-112-1225 • CDllegeStaliDn, 1X 888-690-2218 QA/Qe Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units MethOd: A4500-S04 E Sample ID: LCS-C101130 Sulfate Sample 10: MBLK-1_101130 Sulfate Sample 10: C10110870-001AMS Sulfate Sample 10: C10110870-001AMSO Sulfate Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Laboratory Control Sample 5100 mg/L Method Blank ND mg/L Sample Matrix Spike 5880 mg/L Sample Matrix Spike Duplicate 5850 mg/L Report Date: 12/30/10 Work Order: C 1 0110870 RL %REC Low Limit High Limit Run: TURB-2_1 01130A 100 106 90 110 Run: TURB-2_10113OA 0.8 Run: TURB-2_101130A 100 106 90 110 Run: TURB-2_1 01130A 100 104 90 110 ND -Not detected at the reporting limit. RPO RPOLimlt Qual Batch: 101130_1_S04-TURB-W 11/30/1011 :06 11/30/10 11 :08 11/30/10 12:28 11/30/1 0 12:29 0.5 10 Page 17 of 27 Er\ERGY i~'~l Ir~l\ I f.; • www.energylab.com ..",.,EJaIINa"'1IZ Helena, MT 817-472-0111 • Billings, MT 800-735-4489 • Casper, VI'( 811-235-0515 Gil/etta, WY 116 .. 186-7175 • Rapid City, SO 188-872-1225 • College Station, lX 888-680-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: E200.7 Sample 10: MB-101209A Calcium Iron Magnesium Potassium Sodium Sample 10: LFB .. 101209A Calcium Iron Magnesium Potassium Sodium Sample 10: C10110688-001CMS2 Calcium Iron Magnesium Potassium Sodium Sample 10: Cl0110688-001CMSO Calcium Iron Magnesium Potassium Sodium Qualifiers: RL -Analyte reporting limit. 5 5 5 5 MDC -Minimum detectable concentration Method Blank ND mg/L ND mg/L ND mg/L ND mg/L ND mg/L Laboratory Fortified Blank 49.4 mg/L 0.991 mgll 50.1 mg/L 52.5 mg/L 48.0 mg/L Sample Matrix Spike 105 mg/L 1.99 mg/L 99.4 mg/L 90.7 mgll 157 mg/L Sample Matrix Spike Duplicate 104 mg/L 2.00 mg/L 99.9 mg/L 91.3 mg/L 161 mg/L Report Date: 12/30/10 Work Order: C10110870 RL %REC Low limit High Limit RPO RPOLlmlt Qual 0.2 0.002 0.05 0.02 0.3 0.50 0.030 0.50 0.82 0.50 1.0 0.030 1.0 1.0 1.0 1.0 0.030 1.0 1.0 1.0 99 99 100 105 96 97 97 97 88 96 97 98 98 89 100 Run: ICP2-C_l01209A Run: ICP2-C_l01209A 85 115 85 115 85 115 85 115 85 115 Run: ICP2-C_l01209A 70 130 70 130 70 130 70 130 70 130 Run: ICP2-C_l01209A 70 130 70 130 70 130 70 130 70 130 ND -Not detected at the reporting limit. 0.6 0.5 0.5 0.7 2.3 Batch: R140755 12109/10 11 :31 1210911 0 11 :35 12109/10 12:28 12109/1 0 12:32 20 20 20 20 20 Page 18 of 27 EI\ERGY /~ .-iC )1'1'" • ,HI • www.energytab.com .",.,~stx. ,1ft Helena, MT 877-412-0711 • Billings, MT 800-735-4489 . Casper, WY 818-235-0515 Gil/atilt, WV 866-'86-7175 • Rapid City, SD 888-672-1225 . College Station, 1X 888-890-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: E200.8 Sample 10: C10110928-002BMS4 11 Sample Matrix Spike Arsenic 0.0526 mg/L Cadmium 0.0493 mg/L Chromium 0.0521 mg/L Cobalt 0.0533 mg/L Manganese 0.313 mg/L Molybdenum 0.0536 mgIL Nickel 0.0512 mg/L Selenium 0.179 mg/L Silver 0.0112 mg/L Tin 0.0357 mg/L Vanadium 0.0571 mg/L Sample 10: C10110928-002BMSO 11 Sample Matrix Spike Duplicate Arsenic 0.0520 mg/L Cadmium 0.0485 mg/L Chromium 0.0524 mgIL Cobalt 0.0519 mg/L Manganese 0.298 mg/L Molybdenum 0.0548 mg/L Nickel 0.0519 mg/L Selenium 0.172 mg/L Silver 0.0112 mg/L Tin 0.0377 mg/L Vanadium 0.0566 mg/L Sample 10: LRB 11 Method Blank Arsenic ND mg/L Cadmium ND mg/L Chromium ND mg/L Cobalt ND mg/L Manganese ND mg/L Molybdenum ND mglL Nickel 0.000140 mg/L Selenium ND mg/L Silver ND mg/L Tin ND mg/L Vanadium ND mg/L Sample 10: LFB 11 Laboratory Fortified Blank Arsenic 0.0534 mg/L Cadmium 0.0566 mg/L Chromium 0.0547 mg/L Cobalt 0.0532 mgIL Manganese 0.0546 mg/L Molybdenum 0.0536 mg/L Qualifiers: RL -Analyte reporting limit. ND . Not detected at the reporting limit. S -Spike recovery outside of advisory limits. Report Date: 12/30/10 Work Order: C10110870 RL %REC Low Limit High Limit RPO RPOLlmit Qual Batch: R141005A Run: ICPMS4-C_101216A 1211711003:50 0.0010 105 70 130 0.010 99 70 130 0.050 104 70 130 0.010 102 70 130 0.010 70 130 A 0.0010 104 70 130 0.050 97 70 130 0.0010 101 70 130 0.010 56 70 130 S 0.0010 71 70 130 0.0010 107 70 130 Run: ICPMS4-C_101216A 12117/10 03:57 0.0010 103 70 130 1.2 20 0.010 97 70 130 1.6 20 0.050 104 70 130 0.5 20 0.010 99 70 130 2.6 20 0.010 70 130 4.7 20 A 0.0010 106 70 130 2.4 20 0.050 98 70 130 1.4 20 0.0010 89 70 130 3.5 20 0.010 56 70 130 0.2 20 S 0.0010 75 70 130 5.6 20 0.0010 106 70 130 0.8 20 Run: ICPMS4-C_101216A 12116/10 16:35 0.0050 0.00050 0.020 0.010 0.010 0.010 0.020 0.0050 0.010 0.10 0.020 Run: ICPMS4-C_101216A 12116/10 16:43 0.0010 107 85 115 0.0010 113 85 115 0.0010 109 85 115 0.0010 106 85 115 0.0010 109 85 115 0.0010 107 85 115 A -The analyte level was greater than four times the spike level. In accordance with the method % recovery is not calculated. MDC - Minimum detectable concentration Page 19 of 27 EN:RGY /\.,. . ,.' ", . www.energylab.com AM/fIIAI~" 1m Helenl, MT 877-472-0711 • Billings, MT 808-735-4489 • Casper, WY 881-235-0515 Gillatta, 'NY 888-'88-7175 • Rapid City, so '''-172-1225 • College Station, TX 881-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: E200.8 Sample 10: LFB 11 Laboratory Fortified Blank Nickel 0.0551 mgIL Selenium 0.0545 mglL Silver 0.0225 mglL Tin 0.0536 mglL Vanadium 0.0546 mgIL Method: E200.8 Sample 10: C10110870-002BMS4 4 Sample Matrix Spike Beryllium 0.185 mg/L Cadmium 0.221 mglL Copper 0.247 mglL Molybdenum 0.319 mglL Sample 10: C10110870-002BMSO 4 Sample Matrix Spike Duplicate Beryllium 0.186 mg/L Cadmium 0.222 mglL Copper 0.252 mg/L Molybdenum 0.336 mglL Sample 10: LRB 4 Method Blank Beryllium NO mglL Cadmium NO mglL Copper NO mglL Molybdenum NO mglL Sample 10: LFB 4 Laboratory Fortified Blank Beryllium 0.0534 mgIL Cadmium 0.0527 mgIL Copper 0.0529 mg/L Molybdenum 0.0500 mg/L Qualifiers: RL -Analyte reporting limit. MDC - Minimum detectable concentration RL 0.0010 0.0010 0.0010 0.0010 0.0010 0.010 0.010 0.010 0.10 0.010 0.010 0.010 0.10 0.00050 0.00050 0.010 0.010 0.0010 0.0010 0.0010 0.0010 Report Date: 12/3011 0 Work Order: C10110870 %REC Low Limit High Limit RPO RPOLimit Qual Batch: R141005A Run: ICPMS4-C_101216A 12116/10 16:43 110 85 115 109 85 115 112 85 115 107 85 115 109 85 115 Batch: R141190A Run: ICPMS4-C_101221A 12122110 13:06 74 70 130 88 70 130 97 70 130 109 70 130 Run: ICPMS4-C_101221A 12122110 13:13 75 70 130 0.6 20 89 70 130 0.7 20 99 70 130 2.1 20 116 70 130 5.4 20 Run: ICPMS4-C_101221A 12121/1017:14 Run: ICPMS4-C_101221A 12121/10 17:21 107 85 115 105 85 115 106 85 115 100 85 115 NO -Not detected at the reporting limit. Page 20 of 27 EN:RGY ",' II · J", I '~~ I • Client: Denison Mines USA Corp Helena, MT 877-472-0111 • Billings, MT 801-735-44" • Casper, WY 888-235-0515 Gillette, WY 888-&8&-7175 • Rapid City, SD 888-&72-1225 • College Station, 1X 888-610·2218 QA/QC Summary Report Prepared by Casper, WY Branch Report Date: 12/30/10 Project: Semi-Annual Groundwater 2010 Work Order: C 10110870 Analyte Count Result Units RL %REC Low Limit High Limit RPD RPOLimit Qual Method: E200.8 Batch: R141221A Sample 10: C10120061-001CMS4 7 Sample Matrix Spike Run: ICPMS4-C_101222A 12123/10 09:21 Lead 0.0525 mg/L 0.050 105 70 130 Mercury 0.00410 mg/L 0.0010 82 70 130 Silver 0.0183 mglL 0.010 92 70 130 Thallium 0.0523 mglL 0.0010 105 70 130 Tin 0.0452 mglL 0.0010 90 70 130 Uranium 0.0526 mglL 0.00030 99 70 130 Zinc 0.0567 mglL 0.010 108 70 130 Sample 10: Cl0120061-001CMSO 7 Sample Matrix Spike Duplicate Run : ICPMS4-C_l01222A 12123/10 09:28 Lead 0.0533 mgIL 0.050 107 70 130 1.5 20 Mercury 0.00398 mglL 0.0010 80 70 130 3.0 20 Silver 0.0180 mglL 0.010 90 70 130 2.1 20 Thallium 0.0536 mg/L 0.0010 107 70 130 2.3 20 Tin 0.0473 mg/L 0.0010 95 70 130 4.5 20 Uranium 0.0533 mglL 0.00030 101 70 130 1.3 20 Zinc 0.0570 mglL 0.010 109 70 130 0.4 20 Sample 10: LRB 7 Method Blank Run: ICPMS4-C_l01222A 12123/10 13:52 Lead NO mglL 0.0010 Mercury NO mglL 0.00050 Silver NO mglL 0.010 Thallium NO mglL 0.00050 Tin NO mglL 0.10 Uranium NO mglL 0.00030 Zinc 0.00118 mglL 0.010 Sample 10: LFB 7 Laboratory Fortified Blank Run: ICPMS4-C_l01222A 12123/10 13:59 Lead 0.0536 mgIL 0.0010 107 85 115 Mercury 0.00541 mg/L 0.0010 108 85 115 Silver 0.0212 mg/L 0.0010 106 85 115 Thallium 0.0535 mglL 0.0010 107 85 115 Tin 0.0508 mglL 0.0010 102 85 115 Uranium 0.0528 mglL 0.00030 105 85 115 Zinc 0.0577 mglL 0.0010 113 85 115 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MOC -Minimum detectable concentration Page 21 of 27 EI\ERGY ... ~i. II •• '.1 , 1.1 '. www.energyiab.com AM/ffII:III~" ,1St Helenl, MT 817-412-0711 • Billings, NT 800-135-4489 • Casper, WY 818-235-0515 GillattlI, WY 118-88B-1115 • Rapid City, SD 118-872-1225 • Co/lege Stalion, TX 818-690-2211 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: E353.2 Sample 10: MBLK-1 Nitrogen, Nitrate+Nitrite as N Sample 10: LCS-2 Nitrogen, Nitrate+Nitrite as N Sample 10: C10110867-007CMS Nitrogen, Nitrate+Nitrite as N Sample 10: C10110867-007CMSO Nitrogen, Nitrate+Nitrite as N Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mg/L Laboratory Control Sample 2.51 mg/L Sample Matrix Spike 2.02 mg/L Sample Matrix Spike Duplicate 2.00 mg/L Report Date: 12/30/10 Work Order: C10110870 RL %REC Low LImit High LImit Run: TECHNICON_1 01124A 0.04 Run: TECHNICON_1 01124A 0.10 100 90 110 Run: TECHNICON_101124A 0.10 101 90 110 Run: TECHNICON_1 01124A 0.10 100 90 110 ND -Not detected at the reporting limit. RPO RPOLlmit Qual 1.0 Batch: R140299 11124/10 12:12 11/24/1012:14 11/24/10 14:30 11/24/1 0 14:32 10 Page 22 of 27 EI\ERGY l\---1.lJi.,"I.l ' In " www.energytab.com ~~SIIIu'm Helen., MT 877·412·0711 • Billings, MT 800·735-4489 • Casper, 'NY 888·235-0515 Gillette, 'NY 818-686·7115 • Rapid City, SD 888·172·1225 • College Station, 1X 881-690·2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: E900.1 Sample 10: MB-GA-0378 Gross Alpha minus Rn & U 3 Method Blank -0.1 pCi/L pCVL pCi/L Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Sample 10: LCS·GA-0378 Gross Alpha minus Rn & U Sample 10: C10110928-002CMS Gross Alpha minus Rn & U Sample 10: C10110928·002CMSO Gross Alpha minus Rn & U QualHlers: RL -Analyte reporting limit. MDC -Minimum detectable concentration 0.5 Laboratory Control Sample 30.9 pCi/L Sample Matrix Spike 23.8 pCi/L Sample Matrix Spike Duplicate 26.4 pC ilL Report Date: 12/30/10 Work Order: C1 0110870 RL %REC Low Limit High Limit Run: G5000W_101201A Run: G5000W_101201A 118 70 130 Run: G5000W_101201A 85 70 130 Run: G5000W_101201A 95 70 130 NO -Not detected at the reporting limit. RPO RPOLImit Qual 10 Batch: GA-0378 12102110 09:38 U 1210211009:38 1210211011 :11 12102110 11 :11 29.4 U -Not detected at minimum detectable concentration Page 23 of 27 EN:RGY 1\0--",1·,\1.1-11 ", www.energyiab.com AMI!fIaI &uIIIIa smc. 1m Halen., MT 877-472-0711 • BiIIlnl" MT 80'-735-4489 • Casper, WY •• 8-235-0515 Glilatte, 'N'( 88&-886-7175 • Rapid City, SO 888-872-1225 • College Station, TX 888-S9O-2218 QAlQC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 12/30/10 Project: Semi-Annual Groundwater 2010 Work Order: C10110870 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: SW8260B Batch: R140482 Sample 10: 120110_LCS_4 16 Laboratory Control Sample Run: SATURNCA_l01201A 12101/1012:51 Acetone 120 ug/L 20 118 70 130 Benzene 8.0 ug/L 1.0 80 70 130 Carbon tetrachloride 8.6 ug/L 1.0 86 70 130 Chloroform 8.8 ug/L 1.0 88 70 130 Chloromethane 9.1 ug/L 1.0 91 70 130 m+p-Xylenes 17 ug/L 1.0 85 70 130 Methyl ethyl ketone 100 ug/L 20 102 70 130 Methylene chloride 9.3 ug/L 1.0 93 70 130 Naphthalene 8.6 ug/L 1.0 86 70 130 o-Xylene 8.5 ug/L 1.0 85 70 130 Toluene 8.3 ug/L 1.0 83 70 130 Xylenes, Total 25 ug/L 1.0 85 70 130 Surr: l,2-0ichlorobenzene-d4 1.0 103 80 120 Surr: Oibromofluoromethane 1.0 105 70 130 Surr: p-Bromofluorobenzene 1.0 101 80 130 Surr: Toluene-d8 1.0 98 80 120 Sample 10: 120110_MBLK_6 16 Method Blank Run: SATURNCA_l 01201 A 12101/10 14:03 Acetone NO ug/L 20 Benzene NO ug/L 1.0 Carbon tetrachloride NO ug/L 1.0 Chloroform NO ug/L 1.0 Chloromethane NO ug/L 1.0 m+p-Xylenes NO ug/L 1.0 Methyl ethyl ketone NO ug/L 20 Methylene chloride NO ug/L 1.0 Naphthalene NO ug/L 1.0 o-Xylene NO ug/L 1.0 Toluene NO ug/L 1.0 Xylenes, Total NO ug/L 1.0 Surr: 1,2-0ichlorobenzene-d4 1.0 96 80 120 Surr: Oibromofluoromethane 1.0 100 70 130 Surr: p-Bromofluorobenzene 1.0 97 80 120 Surr: Toluene-d8 1.0 93 80 120 Sample 10: C10110870-o03EMS 16 Sample Matrix Spike Run: SATURNCA_l01201A 12101/1020:16 Acetone 1100 ug/L 200 112 70 130 Benzene 100 ug/L 10 103 70 130 Carbon tetrachloride 110 ug/L 10 106 70 130 Chloroform 110 ug/L 10 108 70 130 Chlorom ethane 110 ug/L 10 107 70 130 m+p-Xylenes 210 ug/L 10 104 70 130 Methyl ethyl ketone 1000 ug/L 200 104 70 130 Methylene chloride 100 ug/L 10 102 70 130 Naphthalene 100 ug/L 10 104 70 130 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 24 of 27 EI\ERGY I ,",. ~ JI ~ ,\ I ::. I, I '. www.energylab.com AIII1f/IM lJiaIIIRcI SIIJu ,m Helene, MT 877-472-0711 • Billings, MJ 800-735-4489 • Casper, YfY 888-235-0515 Gillatta, WY 88&-888-7175 • Rapid City, SD 888-872-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 12/30/1 0 Project: Semi-Annual Groundwater 2010 Work Order: Cl 011 0870 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: SW8260B Batch: R140462 Sample 10: C10110870-o03EMS 16 Sample Matrix Spike Run: SATURNCA_101201A 12101/1020:16 o-Xylene 100 ug/L 10 102 70 130 Toluene 110 ug/L 10 107 70 130 Xylenes, Total 310 ug/L 10 103 70 130 Surr: 1,2-Dichlorobenzene-d4 1.0 102 60 120 Surr: Dibromofluoromethane 1.0 103 70 130 Surr: p-Bromofluorobenzene 1.0 104 60 120 Surr: Toluene-d6 1.0 100 60 120 Sample ID: C10110870-003EMSD 16 Sample Matrix Spike Duplicate Run: SATURNCA_l01201A 12101/10 20:53 Acetone 1200 ug/L 200 119 70 130 6.2 20 Benzene 110 ug/L 10 106 70 130 4.6 20 Carbon tetrachloride 110 ug/L 10 105 70 130 0.4 20 Chloroform 110 ug/L 10 106 70 130 2.2 20 Chloromethane 100 uglL 10 104 70 130 3.4 20 m+p-Xylenes 210 ug/L 10 104 70 130 0.4 20 Methyl ethyl ketone 1100 ug/L 200 112 70 130 7.4 20 Methylene chloride 110 ug/L 10 106 70 130 3.9 20 Naphthalene 110 ug/L 10 107 70 130 3.4 20 o-Xylene 100 ug/L 10 103 70 130 1.2 20 Toluene 110 ug/L 10 109 70 130 1.5 20 Xylenes, Total 310 uglL 10 104 70 130 0.1 20 Surr: 1,2-Dichlorobenzene-d4 1.0 103 60 120 0.0 10 Surr: Dibromofluoromethane 1.0 105 70 130 0.0 10 Surr: p-Bromofluorobenzene 1.0 104 60 120 0.0 10 Surr: Toluene-d8 1.0 102 80 120 0.0 10 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 25 of 27 EN:RGY .'I-;' .... I·/'d (.f.'l' " www.energytab.com AMfItIaI~ .. rm Helene, MT 877-472-0711 • BIllings, MT 801-735-4489 • Casper, WY 888-235-1515 Gillette, WY 888-888-7175 • Rapid City, SD 118-872-1225 • Collage Station, 1X 888-611-2218 Workorder Receipt Checklist Denison Mines USA Corp III~I~ 11111111111111111111111111111111111111111111111 C10110870 Login completed by: Edith McPike Reviewed by: BL2000\kschroeder Reviewed Date: 12/1/2010 Shipping container/cooler in good condition? Custody seals intact on shipping container/cooler? Custody seals intact on sample bottles? Chain of custody present? Chain of custody signed when relinquished and received? Chain of custody agrees with sample labels? Samples in proper container/bottie? Sample containers intact? Sufficient sample volume for indicated test? All samples received within holding time? ContainerlTemp Blank temperature: Water -VOA vials have zero headspace? Water -pH acceptable upon receipt? Contact and Corrective Action Comments: None Yes 0' Yes 0' Yes 0 Yes 0' Yes 0' Yes 0' Yes 0' Yes 0' Yes 0' Yes 0' 3°C Yes 0' Yes 0' Date Received: 11/24/2010 Received by: ha No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 Carrier name: FedEx Not Present 0 Not Present 0 Not Present 0' No VOA vials submitted 0 Not Applicable 0 Page 26 of 27 ,., .... ,S!, •• atiilm. Company Name: D t...(I..;,5.cA M~' "'_t..5 -.,naln OT \;ustoay and Analytical Request Record PLEASE PRINT (Provide as much Information as possible.) Project Name, PWS. Permit. Etc. I Sample Origin " /~.t . .Io...te...,.. .... c-'O Se.-' o... ...... "'v~\ L7"O"'~V-qo State: VI Page _1_ of _,_ EPA/State Compliance: Yes 8 No 0 Report Mail Address: Pc Bex lfC,\ 5\~nj.in~ LX\' 84;11 Contact Name: Phone/Fax; Email: R~o..f\ PoJM~r 435 "78 ~~I Sampler: (Please Print) k""u J..16 II ,'J4;j.. Invoice Address: Invoice Contact & Phone: Purchase Order: OuotelBottle Order: ~"'M~ Special Report/Formats: Dow o EOD/EDT(Electronic Data) o POTWMJWTP Fonnat:, ____ _ o State: ___ _ o Other: ___ _ o LEVEL IV o NELAC D6...~~~ -C.r~ 3: &OO&l1W@il@ ~~~ o .... ~O(l>~ ~al;:gOI ~ B>~ ru-m cU)Ci5 (I> 3: 03:-~::l 0) o· U 0 c: '0 « ,-li%il~ r-•• CD ~.-...J) '-G)-a .... -~ a.col~o ., ~~co. ".I ::l~ ~1~3: "'" za. Q.)o .. E >1 ~ ~ "'S G SAMPLE IDENTIFICATION Collection CoII~tion I MATRIX (Name, Location. Interval, etc.) Date Time 1 b~vJ MW 3A 1I-kl..~j{) cqQO 'j. 2 /J..\J ~o H-~·~oIC ,~~r, b'vJ f 3 Mw ~3 11 ... :;o.·~ew,) 1036 b-vJ 'f 4 ~c ~~ 13:>IO-f'k \\ .;a,~p\O :; :r~\> ~~x:., 6 -7 8 9 0 w ::t: U ~ ~ w w en ... ~l R t:. "0 c: e I U co c: :s ~ I 5 co "0 c: tll Ci5 I H Contact Ell prior to RUSH sample submittal for charges and scheduling -See Instruction Page Comments: ~G.CK Coo/II/' lO(s): ~~~ Receipt T.mp 3 DC On Ice: (:0N Custody Seal ~: ~y: Intact Y N Stgnatufl Y N Match ~ ~ ~ 11 ~ ~ ©) ~ ~ ~ rI 10 ~r.~~--~rE~~~~~~----~~~------~----~~~~~--~~~~~~~~--~~--~~=-------------~~~~~------~ cg Custody ~ Record ~b@~,.,1;l,~~;=\;--1.!..::.:l~~~~LL~_~!AClI~t....,~~~~~----+7i"=-:==~ OalelTlme: s.'gnature: ~MUSTbe~----------------------------------,"==~~~----~~------__ ~~~ ______ ~ --...I Signed RetumtoClient: Lab Disposal: ___ _ In certain circumstances, samples submitted to Energy Laboratories. Inc. may be subcontracted to other certified laboratories in order to complete the analysis requested. This serves as notice of this possibility. All sub-contract data will be clearly notated on your analytical report. Visit our web site at www.energylab.com for additional information. downloadable fee schedule. forms. and links. EN:RGY \ -dt"?.--1 ')f<r=<""' www.energylab.com bIIyt/I:M~Stru llU Helena, MT 817-412-0111 • Billings, MT 800-135-4489 • Casper, WY 888-235-0515 Gllletta, WY 8S6-188-7175 • Rapid City, SD 888-872-1225 • College Station, 1X 888-691-2218 ANALYTICAL SUMMARY REPORT January 06, 2011 Denison Mines USA Corp 6425 S Hwy 191 Blanding, UT 84511 Workorder No.: C1 011 0928 Quote 10: C1640 -POC Wells Project Name: Semi-Annual Groundwater 2010 Energy Laboratories, Inc. Casper WY received the following 4 samples for Denison Mines USA Corp on 11/30/2010 for analysis. Sample 10 Client Sample 10 Collect Date Receive Date Matrix Test C1 011 0928-001 MW34R 11/26/1010:1111/30/10 Aqueous Metals by ICP/ICPMS, Dissolved Alkalinity QA Calculations Chloride Fluoride Nitrogen, Ammonia Nitrogen, Nitrate + Nitrite pH Gross Alpha minus Rn222 and Uranium Solids, Total Dissolved Sulfate SW8260B VOCs, Standard List C1 011 0928-002 MW34 11/29/1 0 08: 10 11/30/10 Aqueous Same As Above C1 011 0928-003 Trip Blank 11/29/1 0 00 :00 11/30/10 Aqueous SW8260B VOCs, Standard List C 10110928-004 Temp Blank 11/29/1000:0011/30/10 Aqueous Temperature This report was prepared by Energy Laboratories, Inc., 2393 Salt Creek Hwy., Casper, WY 82601. Any exceptions or problems with the analyses are noted in the Laboratory Analytical Report, the QA/QC Summary Report, or the Case Narrative. The results as reported relate only to the item(s) submitted for testing. If you have any questions regarding these test results, please call. Report Approved By: cS¥~ £'> tJtJ.~ Reporting Supervisor Digitally signed by Stephanie Waldrop Date: 2011 .01.06 15:05:55 -07:00 Page 1 of 25 www.energylab.com Helena, MT 877-412-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 AM/ytII:M rxuu.oc. SIna 1m 15 • so 818-&72-1225 • 8 CLIENT: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Report Date: 01/06/11 Sample Delivery Group: C10110928 CASE NARRATIVE ORIGINAL SAMPLE SUBMITTAL(S) All original sample submittals have been returned with the data package. SAMPLE TEMPERATURE COMPLIANCE: 4"C (±2"C) Temperature of samples received may not be considered properly preserved by accepted standards. Samples that are hand delivered immediately after collection shall be considered acceptable if there is evidence that the chilling process has begun. GROSS ALPHA ANALYSIS Method 900.0 for gross alpha and gross beta is intended as a drinking water method for low TDS waters. Data provided by this method for non potable waters should be viewed as inconsistent. RADON IN AIR ANALYSIS The desired exposure time is 48 hours (2 days). The time delay in returning the canister to the laboratory for processing should be as short as possible to avoid excessive decay. Maximum recommended delay between end of exposure to beginning of counting should not exceed 8 days. SOIUSOLID SAMPLES All samples reported on an as received basis unless otherwise indicated. ATRAZINE, SIMAZINE AND PCB ANALYSIS Data for PCBs, Atrazine and Simazine are reported from EPA 525.2. PCB data reported by ELI reflects the results for seven individual Aroclors. When the results for all seven are ND (not detected), the sample meets EPA compliance criteria for PCB monitoring. SUBCONTRACTING ANALYSIS Subcontracting of sample analyses to an outside laboratory may be required. If so, ENERGY LABORATORIES will utilize its branch laboratories or qualified contract laboratories for this service. Any such laboratories will be indicated within the Laboratory Analytical Report. BRANCH LABORATORY LOCATIONS eli-b -Energy Laboratories, Inc. -Billings, MT eli-g -Energy Laboratories, Inc. -Gillette, WY eli-h -Energy Laboratories, Inc. -Helena, MT eli-r -Energy Laboratories, Inc. -Rapid City, SD eli-t -Energy Laboratories, Inc. -College Station, TX CERTIFICATIONS: USEPA: WY00002, Radiochemical WY00937; FL-DOH NELAC: E87641, Radiochemical E871 017; California: 02118CA; Oregon: WY200001; Utah: 3072350515; Virginia: 00057; Washington: C1903 ISO 17025 DISCLAIMER: The results of this Analytical Report relate only to the items submitted for analysis. ENERGY LABORATORIES, INC. -CASPER,WY certifies that certain method selections contained in this report meet requirements as set forth by the above accrediting authorities. Some results requested by the client may not be covered under these certifications. All analysis data to be submitted for regulatory enforcement should be certified in the sample state of origin. Please verify ELI's certification coverage by visiting www.energylab.com ELI appreciates the opportunity to provide you with this analytical service. For additional information and services visit our web page www.energylab.com. Page 2 of 25 EI\ERGY I • \ 1 I ." [i I r r rll ~, www.energylab.com AM/yIb/~SiJJu 1m Helena, MT 877-472-0711 • Billings, MY 800-735-4489. Casper, WY 888-235-0515 Gillette, WY 866-686-7175 • Rapid City, Sil 888-&12-1225 • College Station, 1X 888-690-2218 QAlQC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Method: A2320 B Sample 10: MBLK Alkalinity, Total as CaC03 Carbonate as C03 Bicarbonate as HC03 Count Result Units 3 Method Blank NO NO mg/L mg/L ND mg/L Sample 10: LCS Laboratory Control Sample Alkalinity, Total as CaC03 206 mg/L Sample 10: C10110928-001AOUP 3 Sample Duplicate Alkalinity, Total as CaC03 3.18 mg/L Carbonate as C03 NO mg/L Bicarbonate as HC03 Sample 10: C10110928-001AMS Alkalinity, Total as CaC03 Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration 3.88 mg/L Sample Matrix Spike 134 mg/L Report Date: 01/06/11 Work Order: C 1 011 0928 RL %REC Low Limit High Limit Run: MANTECH_1 01201 B Run: MANTECH_1 01201 B 5.0 103 90 110 Run: MANTECH_1 01201 B 5.0 5.0 5.0 Run: MANTECH_1 01201 B 5.0 104 80 120 NO -Not detected at the reporting limit. RPO RPOLimlt Qual Batch: R140469 12/01/10 15:27 12/01/10 15:42 12/01/10 18:28 10 10 10 12/01/1018:37 Page 9 of 25 EI\ERGY 1 ,>.. ) 'n/-,l '..)r:-ll •• www.energylab.com AnMyfIt:M &uIma SItJu rm Helena, MT 811-472-0111 • Billings, MY 800-735-4489 • Casper, WY 881-235-0515 Gillette, WY 1&6-&86-7115 • Rapid City, SD 818-&72-1225 • College Station, TX 811-698-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Method: A2540 C Result Sample 10: MBLK1_101201 Solids, Total Dissolved TDS @ 180 C Method Blank ND Units mg/L Sample 10: LCS1_101201 Laboratory Control Sample Solids, Total Dissolved TDS @ 180 C 980 mg/L Sample 10: C10110961-002AMS Sample Matrix Spike Solids, Total Dissolved TDS @ 180 C 3180 mg/L Sample 10: C10110961-002AMSD Sample Matrix Spike Duplicate Solids, Total Dissolved TDS @ 180 C 3150 mg/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Report Date: 01/06/11 Work Order: C 10110928 RL %REC Low Limit High Limit Run: BAL-1 _101201A 10 Run: BAL-1_101201A 10 98 90 110 Run: BAL-1 101201A -10 105 90 110 Run: BAL-1 101201A - 10 103 90 110 ND -Not detected at the reporting limit. RPD RPDLimit Qual Batch: 101201_C SLDS-TDS-W 12101/1015:03 12101/1015:05 12/01/1015:10 12/01/1015:11 0.9 10 Page 10 of 25 EN:RGY I Ar r'l[(/ I ':r~l . www.energylab.com ~/EJUIIIIcfstnu ,m Helena, MT 877-412-0711 • Billings, MT 801-735-4489 • Casper, WY 888-235-0515 Gillette, WY 86&.686-7175 • Rapid City, SD 888-172-1225 • College Station, 1X 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: A4500-CI B Sample 10: MBLK9-12/15/2010 Chloride Sample 10: C10110928-001AMS Chloride Sample 10: C10110928-001AMSO Chloride Sample 10: LCS35-12/15/2010 Chloride Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mg/L Sample Matrix Spike 35.1 mg/L Sample Matrix Spike Duplicate 35.5 mg/L Laboratory Control Sample 3580 mg/L Report Date: 01/06/11 Work Order: C1 011 0928 RL %REC Low Limit High Limit RPO RPOLimit Cual Batch: 12115/2010-CL-TIR-W Run: TITRATION_101215A 12115/1014:51 0.5 Run: TITRATION_101215A 12115/10 15:33 1.0 99 90 110 Run: TITRATION_101215A 12115/10 15:35 1.0 100 90 110 1.0 10 Run: TITRATION_101215A 12/15/10 15:49 1.0 101 90 110 NO -Not detected at the reporting limit. Page 11 of 25 EI\ERGY i\f....l,CPnr'-.JP1'-· www.energyfab.com AMlyticMEtuIiftaShlu 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 866-686-7115 • Rapid City, SD 888-672-1225 • College Station, IX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: A4S00-F C Sample 10: MBLK Fluoride Sample 10: LCS Fluoride Sample 10: C10110928-001AMS Fluoride Sample 10: C10110928-001AMSO Fluoride Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mg/L Laboratory Control Sample 1.04 mg/L Sample Matrix Spike 1.02 mg/L Sample Matrix Spike Duplicate 1.02 mg/L Report Date: 01/06/11 Work Order: C1 011 0928 RL %REC Low Limit High Limit Run: MANTECH_1 01201 A 0.05 Run: MANTECH_1 01201 A 0.10 104 90 110 Run: MANTECH 101201A - 0.10 102 80 120 Run: MANTECH_1 01201 A 0.10 102 80 120 ND -Not detected at the reporting limit. RPO RPOLimit Qual 0.0 Batch: R140441 12101/10 08:44 12/01/1008:51 12101/10 12:02 12101/10 12:07 10 Page 12 of 25 www.energytab.CIIIII EN:RGY I /\f \( G' J ,I' r 'I ", AuIyfII:ItI ~ SIIIu IISI Helena, MT 871-412-0711 • Billings, MT 800-735-4489 • Casper, WY 881-235-0515 Gillette, WY 86&-686-7115 • Rapid City, SD 888-&72-1225 • College Station, 1X 881-690-2218 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Method: A4S00-H B QA/QC Summary Report Prepared by Casper, WY Branch Report Date: 01/06/11 Work Order: C1 011 0928 Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Sample 10: ICV1_101130_1 pH Initial Calibration Verification Standard Analytical Run: ORION555A-2_1 01130A 11/30/10 14:24 Method: A4S00-H B Sample 10: C10110928-002AOUP pH Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration 6.86 s.u. 0.010 100 98 102 Batch: 101130_1_PH-W_555A-2 Sample Duplicate Run: ORION555A-2_1 01130A 11/30/10 15:17 7.74 s.u. 0.010 0.8 3 ND -Not detected at the reporting limit. Page 13 of 25 EI\ERGY I I->S,~r,~ l ' 1>1 ' www.energylab.com ~1~SIIIu rlSZ Helen., MT 871-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gilletta, WY 86&-686-1115 • Rapid City, SO .88-872-1225 • Coitege Station, lX 888-69D-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: A4500-NH3 G Sample 10: MBLK-1 Nitrogen, Ammonia as N Sample 10: LCS-2 Nitrogen, Ammonia as N Sample 10: C10110961-002EMS Nitrogen, Ammonia as N Sample 10: C10110961-002EMSO Nitrogen, Ammonia as N Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mg/L Laboratory Control Sample 1.96 mg/L Sample Matrix Spike 2.21 mg/L Sample Matrix Spike Duplicate 2.15 mg/L Report Date: 01/06/11 Work Order: C10110928 RL %REC Low Limit High Limit Run : TECHNICON_101207A 0.02 Run: TECHNICON_101207A 0.050 98 90 110 Run: TECHNICON_101207A 0.050 107 80 120 Run: TECHNICON_101207A 0.050 104 80 120 ND -Not detected at the reporting limit. RPO RPOLimit Qual 2.8 Batch: R140645 12/07/1011:14 12/07/1011:16 12107/10 11 :28 12/07/10 11 :30 10 Page 14 of 25 EI\ERGY J"t ~() r, I .T(· r~ 1-<, www.energylall.com ~~SInu'm Helena, MT 817-412-0711 • Biflings, MT BGO-735-4489 • Casper, WY 888-235-0515 Gilletts, WY 8&&-&8&-1175 • Rapid City, SD 888-&72-1225 • College Stalion, 1X 888-690-221 a QAlQC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 201 0 Analyte Count Result Units Method: A4S00-S04 E Sample 10: LCS-1_101206 Sulfate Sample 10: MBLK-1_101206 Sulfate Sample 10: C1012010S-001AMS Sulfate Sample 10: C1012010S-001AMSO Sulfate Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Laboratory Control Sample 5140 mg/L Method Blank 1 mg/L Sample Matrix Spike 3180 mg/L Sample Matrix Spike Duplicate 3200 mg/L Report Date: 01/06/11 Work Order: C1 011 0928 RL %REC Low Limit High Limit Run: TURB-2_101206A 100 107 90 110 Run: TURB-2_1 01206A 0.8 Run: TURB-2_101206A 50 91 90 110 Run: TURB-2_101206A 50 93 90 110 ND -Not detected at the reporting limit. RPO RPOLimit Qual Batch: 101206_1_S04-TURB-W 12/06/10 13:47 12106/10 13:49 12/06/10 14:16 12/06/10 14:18 0.7 10 Page 15 of 25 EN:RGY • I, (""fl!' r::",PI ' www.energylab.com AMIfIIaI h.A*-SilJu 1m Helena, MT 877-412-0711 • Billings, MT 800-735-4489 • Casper, WY 881-235-0515 Gillette, WY 86&-686-7175 • Rapid City, SIlI18-672-1225 • College Station, 1X 881-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: E200.7 Sample 10: MB-101209A 5 Method Blank Calcium NO mg/L Iron NO mg/L Magnesium ND mg/L Potassium NO mg/L Sodium NO mg/L Sample 10: LFB-101209A 5 Laboratory Fortified Blank Calcium 49.4 mg/L Iron 0.991 mg/L Magnesium 50.1 mg/L Potassium 52.5 mg/L Sodium 48.0 mg/L Sample 10: C10110688·001CMS2 5 Sample Matrix Spike Calcium 105 mg/L Iron 1.99 mg/L Magnesium 99.4 mg/L Potassium 90.7 mg/L Sodium 157 mg/L Sample 10: C10110688-001CMSO 5 Sample Matrix Spike Duplicate Calcium 104 mg/L Iron 2.00 mg/L Magnesium 99.9 mg/L Potassium 91.3 mg/L Sodium 161 mg/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration RL 0.2 0.002 0.05 0.02 0.3 0.50 0.030 0.50 0.82 0.50 1.0 0.030 1.0 1.0 1.0 1.0 0.030 1.0 1.0 1.0 Report Date: 01/06/11 Work Order: C 10110928 O/OREC Low Limit High Limit RPO RPOLimit Qual Run: ICP2-C_l01209A Run: ICP2-C_l01209A 99 85 115 99 85 115 100 85 115 105 85 115 96 85 115 Run: ICP2-C_l01209A 97 70 130 97 70 130 97 70 130 88 70 130 96 70 130 Run: ICP2-C_l01209A 97 70 130 98 70 130 98 70 130 89 70 130 100 70 130 0.6 0.5 0.5 0.7 2.3 Batch: R140755 12/09/10 11 :31 12109/10 11 :35 12109/1 0 12 :28 12109/10 12:32 20 20 20 20 20 NO -Not detected at the reporting limit. Page 16 of 25 EN:RGY ! t ..... '"""f(! I' ,<,)-. www.energylab.com AM/yflI2/ uuU."cfSllIU 1m Helena, MT B77-412-0711 • Billings, MT 800-735-4489. Casper, WY 888-235-0515 Gillette, WY B86-686-7115 • Rapid City, SD 888-&72-1225 • College Station, 1X 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: E200.8 Sample 10: C10110928·002BMS4 13 Sample Matrix Spike Arsenic 0.OS26 mg/L Cadmium 0.0493 mg/L Chromium 0.OS21 mg/L Cobalt 0.OS33 mg/L Lead 0.OS44 mg/L Manganese 0.313 mg/L Molybdenum 0.OS36 mg/L Nickel 0.OS12 mg/L Selenium 0.179 mg/L Thallium 0.OS38 mg/L Tin 0.0357 mg/L Uranium 0.0798 mg/L Vanadium 0.OS71 mg/L Sample 10: C10110928·002BMSO 13 Sample Matrix Spike Duplicate Arsenic 0.0520 mglL Cadmium 0.048S mg/L Chromium 0.OS24 mg/L Cobalt 0.OS19 mg/L Lead 0.OS32 mg/L Manganese 0.298 mg/L Molybdenum 0.0548 mg/L Nickel 0.0519 mg/L Selenium 0.172 mg/L Thallium 0.OS34 mg/L Tin 0.0377 mg/L Uranium 0.0796 mglL Vanadium 0.0566 mg/L Sample 10: LRB 13 Method Blank Arsenic NO mg/L Cadmium NO mg/L Chromium NO mg/L Cobalt NO mg/L Lead NO mg/L Manganese NO mg/L Molybdenum NO mg/L Nickel 0.0001 mg/L Selenium NO mg/L Thallium NO mg/L Tin NO mg/L Uranium NO mg/L Vanadium NO mg/L Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. Report Date: 01/06/11 Work Order: C10110928 RL O/OREC Low Limit High Limit RPO RPOLimit Qual Batch: R14100SA Run: ICPMS4-C_101216A 12/17/10 03:S0 0.0010 lOS 70 130 0.010 99 70 130 O.OSO 104 70 130 0.010 102 70 130 O.OSO 108 70 130 0.010 70 130 A 0.0010 104 70 130 0.050 97 70 130 0.0010 101 70 130 0.0010 106 70 130 0.0010 71 70 130 0.00030 110 70 130 0.0010 107 70 130 Run: ICPMS4-C_l01216A 12117/10 03:57 0.0010 103 70 130 1.2 20 0.010 97 70 130 1.6 20 O.OSO 104 70 130 0.5 20 0.010 99 70 130 2.6 20 0.050 106 70 130 2.2 20 0.010 70 130 4.7 20 A 0.0010 106 70 130 2.4 20 O.OSO 98 70 130 1.4 20 0.0010 89 70 130 3.5 20 0.0010 105 70 130 0.9 20 0.0010 75 70 130 S.6 20 0.00030 110 70 130 0.3 20 0.0010 106 70 130 0.8 20 Run: ICPMS4-C_l01216A 12116/10 16:35 4E-OS 7E-OS SE-OS 1 E-OS 2E-OS 2E-OS 8E-OS 5E-OS SE-OS 2E-OS 0.0002 8E-06 lE-OS A -The analyte level was greater than four times the spike level. In accordance with the method % recovery is not calculated. MOC -Minimum detectable concentration Page 17 of 25 EI\ERGY l .0.50111 r c..1RJ ~ www.energy!all.com AufybluullHt:d/llU 1m Helena, MT 877-472-0711 • Billings, MT 8«10-735-4489 • Casper, WY 888-235-0515 Gillette, WY 866-686-1175 • Rapid City, SD 888-672-1225 • College Station, IX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 01/06/11 Project: Semi-Annual Groundwater 2010 Work Order: C10110928 Analyte Count Aesult Units AL %AEC Low limit High Limit APO APOLimlt Qual Method: E200.B Batch: R141005A Sample 10: LFB 13 Laboratory Fortified Blank Run: ICPMS4-C_101216A 12/16/10 16:43 Arsenic 0.0534 mg/L 0.0010 107 85 115 Cadmium 0.0566 mg/L 0.0010 113 85 115 Chromium 0.0547 mg/L 0.0010 109 85 115 Cobalt 0.0532 mg/L 0.0010 106 85 115 Lead 0.0538 mg/L 0.0010 108 85 115 Manganese 0.0546 mg/L 0.0010 109 85 115 Molybdenum 0.0536 mg/L 0.0010 107 85 115 Nickel 0.0551 mg/L 0.0010 110 85 115 Selenium 0.0545 mg/L 0.0010 109 85 115 Thallium 0.0541 mg/L 0.0010 108 85 115 Tin 0.0536 mg/L 0.0010 107 85 115 Uranium 0.0537 mg/L 0.00030 107 85 115 Vanadium 0.0546 mg/L 0.0010 109 85 115 Method: E200.8 Batch: R141190A Sample 10: C10110870-002BMS4 4 Sample Matrix Spike Run: ICPMS4-C_1 01221 A 12/22/1 0 13 :06 Beryllium 0.185 mg/L 0.010 74 70 130 Copper 0.247 mg/L 0.010 97 70 130 Silver 0.0464 mg/L 0.010 46 70 130 S Zinc 0.317 mg/L 0.010 85 70 130 Sample 10: C1 011 0870-002BMSO 4 Sample Matrix Spike Duplicate Run: ICPMS4-C_l 01221 A 12122110 13:13 Beryllium 0.186 mg/L 0.010 75 70 130 0.6 20 Copper 0.252 mg/L 0.010 99 70 130 2.1 20 Silver 0.0442 mg/L 0.010 44 70 130 4.9 20 S Zinc 0.319 mg/L 0.010 86 70 130 0.7 20 Sample 10: LAB 4 Method Blank Run: ICPMS4-C_101221A 12121/1017:14 Beryllium ND mg/L 3E-05 Copper ND mg/L 6E-05 Silver ND mg/L 8E-05 Zinc 0.005 mg/L 0.0001 Sample 10: LFB 4 Laboratory Fortified Blank Run: ICPMS4-C_101221A 12/21/1017:21 Beryllium 0.0534 mg/L 0.0010 107 85 115 Copper 0.0529 mg/L 0.0010 106 85 115 Silver 0.0209 mg/L 0.0010 104 85 115 Zinc 0.0539 mg/L 0.0010 97 85 115 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MDC -Minimum detectable concentration S -Spike recovery outside of advisory limits. Page 18 of 25 EI\ERGY I.A h101(1 I ')l-'I-' www.energylab.com ARaIytIcM rxc.u.-smc. 1m Helens, MT 877-472-0711 • BIllings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 868-686-7175 • Rapid City, SD 888-672-1225 • College Station, 1X 888-690-2218 QAlQC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: E200.8 Sample 10: C10120061-001CMS4 3 Sample Matrix Spike Lead 0.0525 mg/L Thallium 0.0523 mg/L Uranium 0.0526 mg/L Sample 10: C10120061-001CMSO 3 Sample Matrix Spike Duplicate Lead 0.0533 mg/L Thallium 0.0536 mg/L Uranium 0.0533 mg/L Sample 10: LRB 3 Method Blank Lead ND mg/L Thallium ND mg/L Uranium ND mg/L Sample 10: LFB 3 Laboratory Fortified Blank Lead 0.0536 mg/L Thallium 0.0535 mg/L Uranium 0.0528 mg/L Method: E200.8 Sample 10: C10120584-002CMS4 Sample Matrix Spike Mercury 0.00548 mg/L Sample 10: Cl0120584-002CMSO Sample Matrix Spike Duplicate Mercury 0.00547 mg/L Sample 10: LRB Method Blank Mercury 4E-05 mg/L Sample 10: LFB Laboratory Fortified Blank Mercury 0.00552 mg/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration RL 0.050 0.0010 0.00030 0.050 0.0010 0.00030 2E-05 2E-05 8E-06 0.0010 0.0010 0.00030 0.0010 0.0010 2E-05 0.0010 Report Date: 01/06/11 Work Order: C 10110928 %REC Low Limit High Limit RPO RPOLImit Qual Batch: R141221A Run: ICPMS4-C_l01222A 12123/1009:21 105 70 130 105 70 130 99 70 130 Run: ICPMS4-C_l01222A 12/23/10 09:28 107 70 130 1.5 20 107 70 130 2.3 20 101 70 130 1.3 20 Run: ICPMS4-C_l01222A 12123/10 13:52 Run: ICPMS4-C_l01222A 12123/10 13:59 107 85 115 107 85 115 105 85 115 Batch: R141440A Run: ICPMS4-C_l10103A 01/04/11 12:46 100 70 130 Run: ICPMS4-C 110103A 01/04/1112:52 - 99 70 130 0.2 20 Run: ICPMS4-C_l10103A 01/03/1116:12 Run: ICPMS4-C_l10103A 01/03/11 16:19 109 85 115 ND -Not detected at the reporting limit. Page 19 of 25 EI\ERGY l i'-=-Ion, 1" 1<1 ;::-<:: www.energy/ab.com AMI]fIaI~smc. 1m He/en., MT 877-472-0711 • Billings, fIT 801-135-4489 • Casper, WY 888-235-0515 Gillette, WY 8&6-&86-7175 • Rapid City, SD 888-&12-1225 • College Station, TX 881-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: E353.2 Sample 10: MBLK-1 Nitrogen, Nitrate+Nitrite as N Sample 10: LCS·2 Nitrogen, Nitrate+Nitrite as N Sample 10: C10110892-0020MS Nitrogen, Nitrate+Nitrite as N Sample 10: C10110892-0020MSO Nitrogen, Nitrate+Nitrite as N Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mg/L Laboratory Control Sample 2.44 mg/L Sample Matrix Spike 1.98 mg/L Sample Matrix Spike Duplicate 2.04 mg/L Report Date: 01/06/11 Work Order: C1 011 0928 RL O/OREC Low Limit High Limit RPO RPOLimit Qual Batch: R140567 Run: TECHNICON_1 01203A 12103/10 12:02 0.04 Run: TECHNICON_1 01203A 12103/10 12:05 0.10 98 90 110 Run: TECHNICON_101203A 12103/10 12:20 0.10 99 90 110 Run: TECHN/CON_101203A 12103/10 12:22 0.10 102 90 110 3.0 10 ND -Not detected at the reporting limit. Page 20 of 25 EN:RGY I I~RU I 'AT~I <I-c- www.energylab.com AM/ybI £xAIIMIn SInu '151 Helena, MT 811-412-0111 • Billings, Ml800-135-4489 • Casper, WY888-235-0515 Gillette, WY 866·686-1115 • Rapid City, SJ) 888-&12·1225 • College Station, 1X 888·690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Method: E900.1 Sample 10: MB-GA-0378 Gross Alpha minus Rn & U Count Result 3 Method Blank -0.1 Gross Alpha minus Rn & U Precision (±) 0.5 Gross Alpha minus Rn & U MDC 1 Units pCi/L pCi/L pCi/L Sample 10: LCS-GA-0378 Gross Alpha minus Rn & U Laboratory Control Sample Sample 10: C10110928-002CMS Gross Alpha minus Rn & U Sample /0: C10110928-002CMSO Gross Alpha minus Rn & U Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration 30.9 pCi/L Sample Matrix Spike 23.8 pC ilL Sample Matrix Spike Duplicate 26.4 pCi/L Report Date: 01/06/11 Work Order: C10110928 RL %REC Low Limit High Limit Run: G5000W_101201A Run: G5000W_101201A 118 70 130 Run: G5000W_ 101201A 85 70 130 Run: G5000W_101201A 95 70 130 NO -Not detected at the reporting limit. RPO RPOLimit Qual 10 Batch: GA-0378 12/02/10 09:38 U 12/02/10 09:38 1210211011 :11 12/02/1011 :11 29.4 U -Not detected at minimum detectable concentration Page 21 of 25 EN:RGY I I ... · 1_) f)!.T '""I )1 '-, www.energytab.com AMI1fIt:6I Ext:aIIwIu SInu rm Helena, MT 877-472-071 1 • Billings, MT 800-735-4489 • Caspar, WY 888-235-0515 Gillette, WY 866-688-7175 • Rapid City, SD888-672-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 01/06/11 Project: Semi-Annual Groundwater 2010 Work Order: C10110928 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLImit Qual Method: SW8260B Batch: R140482 Sample 10: 120110_LCS_4 16 Laboratory Control Sample Run: SATURNCA_101201A 12101/1012:51 Acetone 120 ug/L 20 118 70 130 Benzene 8.0 ug/L 1.0 80 70 130 Carbon tetrachloride 8.6 ug/L 1.0 86 70 130 Chloroform 8.8 ug/L 1.0 88 70 130 Chloromethane 9.1 ug/L 1.0 91 70 130 m+p-Xylenes 17 ug/L 1.0 85 70 130 Methyl ethyl ketone 100 ug/L 20 102 70 130 Methylene chloride 9.3 ug/L 1.0 93 70 130 Naphthalene 8.6 ug/L 1.0 86 70 130 o-Xylene 8.5 ug/L 1.0 85 70 130 Toluene 8.3 ug/L 1.0 83 70 130 Xylenes, Total 25 ug/L 1.0 85 70 130 Surr: 1,2-0ichlorobenzene-d4 1.0 103 80 120 Surr: Oibromofluoromethane 1.0 105 70 130 Surr: p-Bromofluorobenzene 1.0 101 80 130 Surr: Toluene-d8 1.0 98 80 120 Sample 10: 120110_MBLK_6 16 Method Blank Run: SATURNCA_101201A 12/01/1014:03 Acetone NO ug/L 20 Benzene NO ug/L 1.0 Carbon tetrachloride NO ug/L 1.0 Chloroform NO ug/L 1.0 Chloromethane NO ug/L 1.0 m+p-Xylenes NO ug/L 1.0 Methyl ethyl ketone NO ug/L 20 Methylene chloride NO ug/L 1.0 Naphthalene NO ug/L 1.0 o-Xylene NO ug/L 1.0 Toluene NO ug/L 1.0 Xylenes, Total NO ug/L 1.0 Surr: 1,2-0ichlorobenzene-d4 1.0 96 80 120 Surr: Oibromofluoromethane 1.0 100 70 130 Surr: p-Bromofluorobenzene 1.0 97 80 120 Surr: Toluene-d8 1.0 93 80 120 Sample 10: C10110870-003EMS 16 Sample Matrix Spike Run: SATURNCA_101201A 12/01/1020:16 Acetone 1100 ug/L 200 112 70 130 Benzene 100 ug/L 10 103 70 130 Carbon tetrachloride 110 ug/L 10 106 70 130 Chloroform 110 ug/L 10 108 70 130 Chloromethane 110 ug/L 10 107 70 130 m+p-Xylenes 210 ug/L 10 104 70 130 Methyl ethyl ketone 1000 ug/L 200 104 70 130 Methylene chloride 100 ug/L 10 102 70 130 Naphthalene 100 ug/L 10 104 70 130 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MOC -Minimum detectable concentration Page 22 of 25 EN:RGY 1_/~ Or-I !"PI-:'_ www.energyfab.com AuIy/Il:S~SInu 1m Helena, r.rr877-472-0711 • Billings, MT 8011-735-44". Casper, WY 888-235-0515 GillattB, WY 866-686-7115 • Rapid City, SD 818-&72-1225 • College Station, 1X 881-690-2218 QA/Qe Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 01/06/11 Project: Semi-Annual Groundwater 2010 Work Order: C1 0110928 Analyte Count Result Units RL %REC Low Limit High limit RPO RPOLImit Qual Method: SW8260B Batch: R140482 Sample 10: Cl0l10870-003EMS 16 Sample Matrix Spike Run: SATURNCA_l01201A 12/01/1020:16 o-Xylene 100 ug/L 10 102 70 130 Toluene 110 ug/L 10 107 70 130 Xylenes, Total 310 ug/L 10 103 70 130 Surr: 1,2-Dichlorobenzene-d4 1.0 102 80 120 Surr: Dibromofluoromethane 1.0 103 70 130 Surr: p-Bromofluorobenzene 1.0 104 80 120 Surr: Toluene-dB 1.0 100 BO 120 Sample 10: Cl Oil 0870-003EMSO 16 Sample Matrix Spike Duplicate Run: SATURNCA_l01201A 12/01/10 20:53 Acetone 1200 ug/L 200 119 70 130 6.2 20 Benzene 110 ug/L 10 lOB 70 130 4.6 20 Carbon tetrachloride 110 ug/L 10 105 70 130 0.4 20 Chloroform 110 ug/L 10 106 70 130 2.2 20 Chloromethane 100 ug/L 10 104 70 130 3.4 20 m+p-Xylenes 210 ug/L 10 104 70 130 0.4 20 Methyl ethyl ketone 1100 ug/L 200 112 70 130 7.4 20 Methylene chloride 110 ug/L 10 106 70 130 3.9 20 Naphthalene 110 ug/L 10 107 70 130 3.4 20 o-Xylene 100 ug/L 10 103 70 130 1.2 20 Toluene 110 ug/L 10 109 70 130 1.5 20 Xylenes, Total 310 ug/L 10 104 70 130 0.1 20 Surr: l ,2-Dichlorobenzene-d4 1.0 103 BO 120 0.0 10 Surr: Dibromofluoromethane 1.0 105 70 130 0.0 10 Surr: p-Bromofluorobenzene 1.0 104 BO 120 0.0 10 Surr: Toluene-dB 1.0 102 BO 120 0.0 10 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 23 of 25 EI\ERGY I 1,,-,0f~(" ()nl;:: '_) www.energylab.com WIyIIaI ExuIIfHw smc. 1m Helena, MT 811-412-0111 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 88&-&8&-7175 • Rapid City, SD 888-&72-1225 • College Station, IX 888-&90-2218 Workorder Receipt Checklist Denison Mines USA Corp 111111111111111111111111111111111111111111111111111111I C10110928 Login completed by: Edith McPike Reviewed by: BL2000\kschroeder Reviewed Date: 12/1/2010 Shipping container/cooler in good condition? Custody seals intact on shipping container/cooler? Custody seals intact on sample bottles? Chain of custody present? Chain of custody signed when relinquished and received? Chain of custody agrees with sample labels? Samples in proper container/bottle? Sample containers intact? Sufficient sample volume for indicated test? All samples received within holding time? ContainerfTemp Blank temperature: Water -VOA vials have zero headspace? Water -pH acceptable upon receipt? Contact and Corrective Action Comments: None Yes 0 Yes 0 Yes 0 Yes 0 Yes 0 Yes 0 Yes 0 Yes 0 Yes 0 Yes 0 2·C On Ice Yes 0 Yes 0 Date Received: 11/30/2010 Received by: ha No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 Carrier name: FedEx Not Present 0 Not Present 0 Not Present 0 No VOA vials submitted 0 Not Applicable 0 Page 24 of 25 "1J Q) tC (1) N 01 0 -N 01 "g!lf{e-W • '_,*PjlllA, ~ Chain 'of Custody and Analytical Request Record PLEASE PRINT JPr9vide as much information as possible.) Page _,_ of _I _ • EPA/State Compliance: Yes ~ No 0 Company Name: De.(1iS~i,\ M ;r1C.~ Project NC!me, PWS, Permit, Etc. I Sample Origin ~e.M I G\~')nu..oJ (,..r~unJ~lA+e.r :+.010 State: ~-r Report Mail Address: Pc B~)C 8'O~ 8J",,,J.:n,.,\ \AT g'i5i1 Contact Name: K~o.f\ fo..lmu Phone/Fax: L-i$.5 678 ~I Email: Sampler: (Please Print) -r::MC.r ~ 611 :J,t" Invoice Address: Invoice Contact & Phone: Purchase Order: Quote/Bottle Order: ~CA..Wl{ D~\);J.. \~rK '-l~ f.715 ~I Special Report/Formats: s: ~ W®D@ [ru~@(!D~®'D'~[Q) .1 Contact ELI prior to Shipped by: ~~I' RUSH sample submittal D DW o POTWIWWTP D State: D Other:---- D EDD/EDT(Electronic Data) Format:. ____ _ o LEVEL IV o NELAC SAMPLE IDENTlFICATION (Name. Location.JIIterval. etc.) Collection Date Collection Time Mw -:&'1 ~ ,,-:u..~16 \Oi \ 2 MW -3~ Il-;l~·ID 08'~ 3 t r ;? Blc..I"K.' 4 5 1'"~o !b\CL(\~ 6 7 8 9 I 10 o ... ~o U)~ 2;!m ;gol Q) .~>~ ~ro COO", U) ~ 0>= lG 0) ,., u >oo c::: ......, _~CI)liiil32 :r ~Q)2 c:::-€ ~ ~ a.co 0 Cl E~I'al· \.J :l Q).!::Q)~ IZfI,°li MATRIX (3 b-W 1- 1 6-w .~ ~ustOdY ~uIshed by (print): \ ",nf\er ~oll ~ ~Ik~ Datemme: -) ~,~O~"fj _ 1 \-:L~,JcI(:, lObO -~~ __ ._ ~ Record Relinquishedby(prinl): <l Datemme: Signature: ~ for charges and Cooler 10(s): 0 R scheduling -See ~\ W C Instruction Page ::I: "0 Receipt Temp U c Comments: ::J U ~ ~ e °C <tI C "-On Ice: (!)N ::J l-S W 'E Custody Seal W <tI On Bottle Y N CI) "0 ~N C 00 Cooler ca en H Intact (!)N Signature G0N Match a I I ~f Datemme: Signature; Received by (print): ReCeived by (print): OaleITlme: Signature: uatIDilme: ~~~ j\-~ .\C) ~ MUST be Signed I ~ecejvad by Uloor.ilOrY: SalTlQle Disposal: Return to Client: Lab Disposal: In certain circumstances, samples submitted to Energy Laboratories, Inc. may be subcontracted to other certified laboratories in order to complete the analysis requested. This serves as notice of this possibility. All sub-contract data will be clearly notated on your analytical report. Visit Our web site at www.energylab.com for additional information. downloadable fee schedule, forms, and links. EI\ERGY I\i:3UH;,1 OBI! ~ www.energylab.com AMI1tIaI~~ 7152 Helena, MT 877-472-0711 • 8illlnls, MT 800·735·4489 . Casper, WY 888·235·0515 Gillatte, WY 81&·68&·7175 • Rapid City, SD 888·&72·1225 • College Station, TX 888·&10·2218 ANAL VTICAL SUMMARY REPORT February 23, 2011 Denison Mines USA Corp 6425 S Hwy 191 Blanding, UT 84511 Workorder No.: C10120105 Quote 10: C1640 -pac Wells Project Name: Semi-Annual Groundwater 2010 Energy Laboratories, Inc. Casper WY received the following 3 samples fo r Denison Mines USA Corp on 12/3/2010 for analysis. Sample ID Client Sample ID Collect Date Receive Date Matrix Test C1 01201 05-001 MW 35 12/01/10 08:40 12/03/10 Aqueous Metals by ICPIICPMS, Dissolved Alkalinity QA Calculations Chloride Fluoride Nitrogen, Ammonia Nitrogen, Nitrate + Nitrite pH Gross Alpha minus Rn222 and Uranium Solids, Total Dissolved Sulfate SW8260B VOCs, Standard List C1 01201 05-002 Trip Blank 1 2/01 /1 0 00 :00 12/03/1 0 Aqueous SW8260B VOCs, Standard List C1 01201 05-003 Temp Blank 12/01/1000:00 12/03/10 Aqueous Temperature This report was prepared by Energy Laboratories, Inc., 2393 Salt Creek Hwy., Casper, WY 82601. Any exceptions or problems with the analyses are noted in the Laboratory Analytical Report, the QA/QC Summary Report, or the Case Narrative. The results as reported relate only to the item(s) submitted for testing. If you have any questions regarding these test results, please call. Report Approved By: c3¥~ cD uJtJ.~ Reporting Supervisor Digitally signed by Stephanie Waldrop Date: 2011.02.23 14:27:43 -07:00 Page 1 of 22 www.energylab.com AMlytJalm.tlauSilru 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-D515 Gillette WY 866-&86-7175 • Ra Id CI ,SO 888-&72-1225 • Colle e Station TX 888-690-2218 CLIENT: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Sample Delivery Group: Cl0120105 REVISEDISUPPLEMENTAL REPORT Revised Date: 02/23/11 Report Date: 01 /10/11 CASE NARRATIVE The attached analytical report has been revised from a previously submitted report due to the request by Kathy Weinel on February 10, 2011 for the reanalysis of Gross Alpha minus Rn & U. The data presented here is from that recheck analysis. The Gross Alpha minus Uranium and Radon recheck data presented in this report is a result of multiple actions taken by the laboratory in order to meet the client stated goal of 'precision should be less than or equal to 20% of the reported analyte response'. The primary analytical changes include the use of a larger sample volume (2 times) coupled with an increased count time (4 times), which did result in a reduced precision value. ORIGINAL SAMPLE SUBMITTAL(S) All original sample submittals have been returned with the data package. SAMPLE TEMPERATURE COMPLIANCE: 4"C (±2"C) Temperature of samples received may not be considered properly preserved by accepted standards. Samples that are hand delivered immediately after collection shall be considered acceptable if there is evidence that the chilling process has begun. GROSS ALPHA ANALYSIS Method 900.0 for gross alpha and gross beta is intended as a drinking water method for low TDS waters. Data provided by this method for non potable waters should be viewed as inconsistent. RADON IN AIR ANALYSIS The desired exposure time is 48 hours (2 days). The time delay in returning the canister to the laboratory for processing should be as short as possible to avoid excessive decay. Maximum recommended delay between end of exposure to beginning of counting should not exceed 8 days. SOIL/SOLID SAMPLES All samples reported on an as received basis unless otherwise indicated. ATRAZINE, SIMAZINE AND PCB ANALYSIS Data for PCBs, Atrazine and Simazine are reported from EPA 525.2. PCB data reported by ELI reflects the results for seven individual Aroclors. When the results for all seven are ND (not detected), the sample meets EPA compliance criteria for PCB monitoring. SUBCONTRACTING ANALYSIS Subcontracting of sample analyses to an outside laboratory may be required. If so, ENERGY LABORATORIES will utilize its branch laboratories or qualified contract laboratories for this service. Any such laboratories will be indicated within the Laboratory Analytical Report. BRANCH LABORATORY LOCATIONS eli-b -Energy Laboratories, Inc. -Billings, MT eli-g -Energy Laboratories, Inc. -Gillette, WY eli-h -Energy Laboratories, Inc. -Helena, MT eli-r -Energy Laboratories, Inc. -Rapid City, SD eli-t -Energy Laboratories, Inc. -College Station, TX CERTIFICATIONS: USEPA: WY00002, Radiochemical WY00937; FL-DOH NELAC: E87641 , Radiochemical E871 017; California: 02118CA; Oregon: WY200001; Utah: 3072350515; Virginia: 00057; Washington: C1903 ISO 17025 DISCLAIMER: The results of this Analytical Report relate only to the items submitted for analysis. ENERGY LABORATORIES, INC. -CASPER,WY certifies that certain method selections contained in this report meet requirements as set forth by the above accrediting authorities. Some results requested by the client may not be covered under these certifications. All analysis data to be submitted for regulatory enforcement should be certified in the sample state of origin. Please verify ELI's certification coverage by visiting www.energylab.com ELI appreciates the opportunity to provide you with this analytical service. For additional information and services visit our web page www.energylab.com. Page 2 of 22 EN:RGY ~,·.lJt)n;\I (~Hll ·; www.energylab.com AM/tbI baIIncI SIIIu 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4488 . Casper, WY 888-235-0515 Gillette, WY 866-188-7175 . Rapid City, SD 888-672-1225 • College Station, IX 888-&80-2218 QA/Qe Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 01/10/11 Work Order: C10120105 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Method: A2320 B Sample 10: MBLK Alkalinity, Total as CaC03 Carbonate as C03 Bicarbonate as HC03 Count Result Units 3 Method Blank ND ND ND mg/L mg/L mg/L Sample 10: LCS Laboratory Control Sample Alkalinity, Total as CaC03 206 mg/L Sample 10: C10120093-002AOUP 3 Sample Duplicate Alkalinity, Total as CaC03 244 mg/L Carbonate as C03 Bicarbonate as HC03 Sample 10: C10120093-002AMS Alkalinity, Total as CaC03 Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration ND mg/L 298 mg/L Sample Matrix Spike 376 mg/L RL %AEC Low Limit High Limit Run: MANTECH_101203B Run: MANTECH_101203B 5.0 103 90 110 Run: MANTECH_101203B 5.0 5.0 5.0 Run: MANTECH_101203B 5.0 107 80 120 ND -Not detected at the reporting limit. APO APOLimit Qual 0.5 0.5 Batch: R140579 12/03/10 16:23 12/03/1016:38 12/03/10 17:02 10 10 10 12/03/10 17:11 Page 7 of 22 EN:RGY l .\HO • \ I ) ~ • :.~ www.energylab.com AMlybIExul/MJaSlllc./m Helena, MT 817-472-0711 • Billings, MT 800-735-4489 • Casper, WY 881-235-D515 Gillette, 'NY 866-&88-7175 • Rapid City, so 888-612-1225 • College Station, TX 888-&90-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 01/10/11 Work Order: Cl0120105 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: A2540 C Sample 10: MBLK1_101203 Method Blank Solids, Total Dissolved TDS @ 180 C ND mg/L Sample 10: LCS1_101203 Laboratory Control Sample Solids, Total Dissolved TDS @ 180 C 996 mg/L Sample 10: C10120101-002AMS Sample Matrix Spike Solids, Total Dissolved TDS @ 180 C 2550 mg/L Sample 10: C10120101-002AMSO Sample Matrix Spike Duplicate Solids, Total Dissolved TDS @ 180 C 2560 mg/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration RL %REC Low limit High Limit RPO RPOLImit Qual Batch: 101203_C SLDS-TDS·W Run: BAL-l_101203A 12/03/1014:19 10 Run: BAL-l_l01203A 12/03/10 14:19 10 100 90 110 Run: BAL-l 101203A 12103/10 14:24 - 10 102 90 110 Run: BAL-l _101203A 12/03/10 14:24 10 102 90 110 0.0 10 ND -Not detected at the reporting limit. Page 8 of 22 EI\ERGY _1\130IU\J Of--H~ .~ www.energyleb.com AMIyIIm~SIIc, 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4488 • Casper, WY 888-235-0515 Gillette, WY 886-888-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-&90-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 01 /1 0/11 Work Order: Cl 01201 05 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: A4500-CI B Sample 10: MBLK9-12/15/2010 Chloride Sample 10: C10120257-002AMS Chloride Sample 10: C10120257-002AMSO Chloride Sample 10: LCS35-12/15/2010 Chloride Qualifiers: RL -Analyte reporting limit. MOC -Minimum detectable concentration Method Blank NO mg/L Sample Matrix Spike 44.1 mg/L Sample Matrix Spike Duplicate 44.4 mg/L Laboratory Control Sample 3580 mg/L RL %REC Low Limit High Limit RPO RPOLimit Qual Batch: 12115/2010-CL-TTR-W Run : TITRATION_101215A 12/15/1014:51 0.5 Run: TITRATlON_101215A 12/15/1015:45 1.0 99 90 110 Run: TITRATION_101215A 1.0 100 90 110 0.8 12/15/1015:47 10 Run: TITRATION_101215A 12/15/10 15:49 1.0 101 90 110 NO -Not detected at the reporting limit. Page 9 of 22 EN:RGY , l\'jO}JI\'I CHrl~ www.energylab.com AMIyfIm ru.IIMu:I SIIu 1m Helena, MT 877-472-0711 • Billings, MT 800-735-44811 • Casper, WI 888-235-0515 Gillette, WY 866-&16-7175 • Rapid City, SD 888-672-1225 • College Station, IX 888-&80-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 01/10/11 Work Order: Cl0120105 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: A4500-F C Sample 10: MBLK Fluoride Sample 10: LCS Fluoride Sample 10: C10120101-001AMS Fluoride Sample 10: C10120101-001AMSO Fluoride Qual ifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mg/L Laboratory Control Sample 1.06 mg/L Sample Matrix Spike 1.14 mg/L Sample Matrix Spike Duplicate 1.12 mg/L RL %REC Low Limit High Limit RPO RPOLimit Qual Batch: R140642 Run: MANTECH_l01207A 12/07/1009:57 0.05 Run: MANTECH_l01207A 12/07/1010:02 0.10 106 90 110 Run: MANTECH_l01207A 12/07/1010:16 0.10 103 80 120 Run: MANTECH_l01207A 12/07/1010:23 0.10 101 80 120 1.8 10 ND -Not detected at the reporting limit. Page 10 of 22 www.energylab.com EN:RGY .• \UOnA T (,HI! S AMIytJc.I Exullt!l&t·SiM.,W Helena,lIT 877-472-0711 • Billings, MT 800-735-4488 • Casper, WY 888-235-0515 Gillette, WY 8&6-18&-7175 • Rapid City, SD 888-672-1225 • College Station,1X 888-690-221 a Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Method: A4500-H B QA/QC Summary Report Prepared by Casper, WY Branch Revised Dale: 02/23/11 Report Dale: 01 /10/11 Work Order: C10120105 Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Sample 10: ICV1_101203_2 pH Initial Calibration Verification Standard Analytical Run: ORION555A-2_1012038 12/03/1013:52 Method: A4500-H B Sample 10: C10120108-001AOUP pH Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration 6.91 s.u. 0.010 101 Sample Duplicate 7.57 s.u. 0.010 98 102 Run: ORION555A-2_1012038 0.0 12/03/1014:49 3 ND -Not detected at the reporting limit. Page 11 of 22 EN:RGY ~ ,d:.o()f-.'/d t::'Hll ~.; www.energylab.com AM/fIIaI~SIIIt:, 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 8&&-186-7175 • Rapid City, SD 888-672-1225 • College Sialion, 1)( 888-&10-2218 QAlQC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 01/10/11 Work Order: C10120105 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: A4500-NH3 G Sample 10: MBLK-1 Method Blank Nitrogen, Ammonia as N NO mg/L Sample 10: LCS-2 Laboratory Control Sample Nitrogen, Ammonia as N 1.96 mg/L Sample 10: C10120105-0010MS Sample Matrix Spike Nitrogen, Ammonia as N 2.69 mg/L Sample 10: C10120105-0010MSO Sample Matrix Spike Duplicate Nitrogen, Ammonia as N 2.69 mg/L Qual ifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration RL %REC Low limit High limit RPO RPOLimit Qual Batch: R140645 Run: TECHNICON_101207A 12/07/1011 :14 0.02 Run: TECHNICON_101207A 12/07/1011:16 0.050 98 90 110 Run: TECHNICON_101207A 12107/10 12:36 0.050 119 80 120 Run: TECHNICON_101207A 12/07/1012:38 0.050 119 80 120 0.0 10 ND -Not detected at the reporting limit. Page 12 of 22 EN:RGY .~\t:Df~;"'-JIHI ~; www.energylab.com AM/tfIM rruu.c. $I6c. lISt Helena, MT 877-472-0711 • Billings, MT 800-735-4488 • Casper, WY 888-235-0515 Gillette, WY 886-186-7175 • Rapid City, SO 188-672-1225 • CDliege Station, 1J( 888-&80-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 01/10/11 Work Order: C10120105 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: A4S00-S04 E Sample 10: LCS-l_l01206 Sulfate Sample 10: MBLK-l_l01206 Sulfate Sample 10: Cl0120105-001AMS Sulfate Sample 10: Cl012010S-001AMSO Sulfate Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Laboratory Control Sample 5140 mg/L Method Blank 1 mg/L Sample Matrix Spike 3180 mg/L Sample Matrix Spike Duplicate 3200 mg/L RL %AEC Low limit High limit RPO APOLimit Qual Batch: 101206_1_S04-TURB-W Run : TURB-2_101206A 12/06/10 13:47 100 107 90 110 Run: TURB-2_101206A 12/06/10 13:49 0,8 Run: TURB-2_101206A 12/06/10 14:16 50 91 90 110 Run: TURB-2_101206A 12/06/10 14:18 50 93 90 110 0,7 10 ND -Not detected at the reporting limit. Page 13 of 22 EN:RGY I\UOI :;,I Of.(lL ..... www.energylab.com AaIytIaI EmIll!Jl:. Sf1IcI 'W Helena, MT877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 8&&-&8&-7175 • Rapid City, SD 888-&72-1225 • COIIBgS Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 01/10/11 Work Order: Cl0120105 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Method: E200.7 Sample 10: MB-101210A Calcium Iron Magnesium Potassium Sodium Sample 10: LFB-101210A Calcium Iron Magnesium Potassium Sodium Sample 10: C10110780-002BMS2 Calcium Iron Magnesium Potassium Sodium Sample 10: C10110780-002BMSO Calcium Iron Magnesium Potassium Sodium Qualifiers: RL -Analyte reporting limit. Count Result Units 5 Method Blank ND mg/L ND mglL ND mg/L ND mg/L ND mg/L 5 Laboratory Fortified Blank 46.2 mg/L 0.959 mg/L 46.3 mg/L 43.2 mg/L 46.0 mg/L 5 Sample Matrix Spike 9250 mg/L 198 mg/L 9790 mg/L 9120 mg/L 45900 mg/L 5 Sample Matrix Spike Duplicate 9530 mg/L 195 mg/L 10100 mg/L 9460 mg/L 46700 mg/L MDC -Minimum detectable concentration RL %REC Low Limit High Limit RPO RPDLimit Qual Batch: R140794 Run : ICP2-C_l01210A 12/10/10 13:00 0.2 0.002 0.05 0.02 0.3 Run: ICP2-C_l01210A 12/10/1013:04 0.50 92 85 115 0.030 96 85 115 0.50 93 85 115 0.50 86 85 115 0.50 92 85 115 Run: ICP2-C_l01210A 12/10/1013:57 46 91 70 130 0.31 97 70 130 10 91 70 130 3.9 87 70 130 58 86 70 130 Run: ICP2-C_l01210A 12/10/1014:01 46 93 70 130 3.0 20 0.31 96 70 130 1.6 20 10 94 70 130 3.1 20 3.9 90 70 130 3.6 20 58 94 70 130 1.8 20 ND -Not detected at the reporting limit. Page 14 of 22 EN:RGY _ /\11 Olli\ 1 OI~ll ~; www.energylab.com AM/ytkM buIIftt:,slla 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 Gilletta, WY 8&&-186-7175 • Rapid City, so 188-&72-1225 • College Station, IX 888-&80-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 01/10/11 Work Order: Cl0120105 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Method: E200.8 Result Sample ID: LRB 17 Method Blank Arsenic 0.001 Beryllium NO Cadmium NO Chromium NO Cobalt NO Copper NO Lead NO Manganese 0.0002 Mercury NO Molybdenum NO Nickel NO Selenium 0.0008 Thallium 3E-05 Tin NO Uranium NO Vanadium NO Zinc 0.0006 Units mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L Sample 10: LFB 17 Laboratory Fortified Blank Arsenic 0.0534 mg/L Beryllium 0.0528 mg/L Cadmium 0.0527 mg/L Chromium 0.0515 mg/L Cobalt 0.0519 mg/L Copper 0.0520 mg/L Lead 0.0522 mg/L Manganese 0.0520 mg/L Mercury 0.00532 mg/L Molybdenum 0.0516 mg/L Nickel 0.0515 mg/L Selenium 0.0549 mg/L Thallium 0.0515 mg/L Tin 0.0511 mg/L Uranium 0.0526 mg/L Vanadium 0.0512 mg/L Zinc 0.0544 mg/L Sample 10: Cl0120114-003BMS4 17 Sample Matrix Spike Arsenic 0.0543 mg/L Beryllium 0.0484 mg/L Cadmium 0.0469 mg/L Chromium 0.0481 mg/L Cobalt 0.0478 mg/L Copper 0.0497 mg/L Lead 0.0537 mg/L Qual ifiers: RL -Analyte reporting limit. MOC -Minimum detectable concentration RL %REC Low Limit High Limit RPD RPOLimit Qual Batch: R140766 Run: ICPMS2-C_l01209B 12/09/10 21 :06 6E-05 3E-05 lE-05 4E-05 2E-05 7E-05 3E-05 5E-05 8E-05 5E-05 0.0007 0.0002 IE-OS 6E-05 lE-05 3E-05 0.0003 Run: ICPMS2-C_l01209B 12/09/10 21 :12 0.0010 104 85 115 0.0010 106 85 115 0.0010 105 85 115 0.0010 103 85 115 0.0010 104 85 115 0.0010 104 85 115 0.0010 104 85 115 0.0010 104 85 115 0.0010 106 85 115 0.0010 103 85 115 0.0010 103 85 115 0.0010 108 85 115 0.0010 103 85 115 0.0010 102 85 115 0.00030 105 85 115 0.0010 102 85 115 0.0010 108 85 115 Run: ICPMS2-C_l01209B 12110/10 12:38 0.0010 106 70 130 0.010 97 70 130 0.010 94 70 130 0.0010 96 70 130 0.010 94 70 130 0.010 96 70 130 0.050 107 70 130 NO -Not detected at the reporting limit. Page 15 of 22 EI\ERGY ,_,\i lr.)ll,\I OllH 0 ... www.energylab.com ~ExuIIMIuSlllu 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 86&-186-7175 • Rapid City, SO 888-672-1225 • College Station, TX 888-&80-221 B OA/oe Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: E200.8 Sample 10: C10120114-003BMS4 17 Sample Matrix Spike Manganese 0.874 mg/L Mercury 0.00525 mg/L Molybdenum 0.0531 mg/L Nickel 0.0596 mg/L Selenium 0.0496 mg/L Thallium 0.0542 mg/L Tin 0.0491 mg/L Uranium 0.141 mg/L Vanadium 0.0508 mg/L Zinc 0.0491 mg/L Sample 10: C10120114-003BMSO 17 Sample Matrix Spike Duplicate Arsenic 0.0542 mg/L Beryllium 0.0483 mg/L Cadmium 0.0467 mg/L Chromium 0.0481 mg/L Cobalt 0.0478 mg/L Copper 0.0491 mg/L Lead 0.0532 mg/L Manganese 0.875 mg/L Mercury 0.00531 mg/L Molybdenum 0.0523 mg/L Nickel 0.0572 mg/L Selenium 0.0501 mg/L Thallium 0.0536 mg/L Tin 0.0500 mg/L Uranium 0.139 mg/L Vanadium 0.0502 mg/L Zinc 0.0477 mg/L Method: E200.8 Sample 10: LRB Method Blank Silver ND mg/L Sample 10: LFB Laboratory Fortified Blank Silver 0.0193 mg/L Sample 10: C10120819-0010MS Sample Matrix Spike Silver 0.0220 mg/L Sample 10: C10120819-0010MSO Sample Matrix Spike Duplicate Silver 0.0223 mg/L QualifIers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. Report Date: 01/10/11 Work Order: C10120105 RL %REC Low limit High limit RPO RPOLImit Qual Batch: R140766 Run: ICPMS2-C_l01209B 12/10/10 12:38 0.010 70 130 A 0.0010 105 70 130 0.0010 106 70 130 0.050 99 70 130 0.0010 97 70 130 0.0010 108 70 130 0.0010 98 70 130 0.00030 113 70 130 0.0010 100 70 130 0.010 89 70 130 Run: ICPMS2-C_l01209B 12/10/10 12:45 0.0010 105 70 130 0.2 20 0.010 97 70 130 0.1 20 0.010 93 70 130 0.5 20 0.0010 96 70 130 0.1 20 0.010 94 70 130 0.1 20 0.010 95 70 130 1.4 20 0.050 106 70 130 1.0 20 0.010 70 130 0.1 20 A 0.0010 106 70 130 1.1 20 0.0010 104 70 130 1.5 20 0.050 95 70 130 4.2 20 0.0010 98 70 130 1.1 20 0.0010 107 70 130 1.2 20 0.0010 100 70 130 1.8 20 0.00030 108 70 130 1.7 20 0.0010 98 70 130 1.2 20 0.010 86 70 130 2.9 20 Batch: R141596 Run: ICPMS2-C_ll0107A 01/07/11 10:30 3E-05 Run: ICPMS2-C_l10107A 01 /07/11 10:43 0.0010 96 85 115 Run: ICPMS2-C_l10107A 01 /07/1114:14 0.010 110 70 130 Run: ICPMS2-C_l101 07A 01 /07/1114:21 0.010 112 70 130 1.2 20 A -The analyte level was greater than four times the spike level. In accordance with the method % recovery is not calculated. MDC -Minimum detectable concentration Page 16 of 22 EI\ERGY . I\liOHJ\r OI~IL:~ www.eneliYlab.com AM/ytIaf &uIIwIu SII!u llU Helena, MT 877-472-0111 • Billings, MT 800-735-4488 • Casper, WY 888-235-0515 Gillette, WY 886-18&-7175 • Rapid City, SD 888-612-1225 . College Slation, TX 888-690-2218 QAlQC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 01 /10/11 Work Order: Cl0120105 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Count Result Units Method: E353.2 Sample 10: MBlK-l Method Blank Nitrogen, Nitrate+Nitrite as N ND mg/l Sample 10: LCS-2 Laboratory Control Sample Nitrogen, Nitrate+Nitrite as N 2.44 mg/l Sample 10: C10120101·003CMS Sample Matrix Spike Nitrogen, Nitrate+Nitrite as N 1.99 mg/l Sample 10: Cl0120101·003CMSO Sample Matrix Spike Duplicate Nitrogen, Nitrate+Nitrite as N 1.98 mg/l Qualifiers: Rl -Analyte reporting limit. MDC -Minimum detectable concentration Rl %REC low Limit High Limit RPO RPOLimit Qual Batch: R140567 Run: TECHNICON_l01203A 12/03/10 12:02 0.04 Run : TECHNICON_l01203A 12/03/1012:05 0.10 98 90 110 Run : TECHNICON_l01203A 12/03/10 14:52 0.10 98 90 110 Run: TECHNICON_l 01203A 12/03/1014:55 0.10 97 90 110 0.5 10 ND -Not detected at the reporting limit. Page 17 of 22 EN:RGY ,:'\.~~ )I~/\I ,--j' Il~- www.energylab.com f ANIytkM EIuIInn SIIIu rut Helena, MT 877-472-0711 • Billings, MT 800-735-4488 . Cuper, WY 888-235-0515 Gillette, WY 866-&86-7175 • Rapid City, SD 888-6'2-1225 • Col/ege Stalion, IX 888-680-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 01/10/11 Work Order: Cl0120105 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 Analyte Method: E900.1 Sample 10: MB-GA-0395 Gross Alpha minus Rn & U Count Result 3 Method Blank -0.07 Gross Alpha minus Rn & U Precision (±) 0.06 Gross Alpha minus Rn & U MOC 0.1 Units pCi/L pCi/L pC ilL Sample 10: LCS-GA-0395 Gross Alpha minus Rn & U Laboratory Control Sample Sample 10: C11020352-001CMS Gross Alpha minus Rn & U Sample 10: Cl1020352-001CMSO Gross Alpha minus Rn & U Qualifiers: RL -Analyte reporting limit. MOC -Minimum detectable concentration 11 .6 pCi/L Sample Matrix Spike 20.2 pCi/L Sample Matrix Spike Duplicate 20.2 pCi/L RL %REC Low Limit High Limit Run: G542M_ll0217A Run: G542M_ll0217A 111 70 130 Run: G542M_ll0217A 94 70 130 Run: G542M_ll0217A 94 70 130 ND -Not detected at the reporting limit. RPO RPOLImit Qual 0.2 Batch: GA-0395 02/22/11 22:32 U 02122/11 22:32 02123/11 05 :25 02123/11 05:25 17 U -Not detected at minimum detectable concentration Page 18 of 22 EN:RGY . I\HOn':~TOHILS www.energylab.com IMITfIcIII EluIIMa Shtu '1M Helena, MT 877-472-0711 • Billings, MT 800-735-448B • Casper, WY 888-235-0515 GiJleHe, WY 866-186-7175 . Rapid City, SD 188-172-1225 • College Station, IX 888-690-2218 QAtQe Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 01/10/11 Work Order: C10120105 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 ---------------------------------- Analyte Count Result Units Rl %REC low limit High limit RPO RPOllmit Qual Method: SW8260B Batch: R140815 Sample 10: 121010_lCS_4 16 laboratory Control Sample Run: SATURNCA_10121 OA 12/10/10 13:35 Acetone 130 ug/L 20 128 70 130 Benzene 10 ug/L 1.0 100 70 130 Carbon tetrachloride 10 ug/L 1.0 100 70 130 Chloroform 10 ug/L 1.0 100 70 130 Chloromethane 8.4 ug/L 1.0 84 70 130 m+p-Xylenes 20 ug/L 1.0 99 70 130 Methyl ethyl ketone 110 ug/L 20 110 70 130 Methylene chloride 11 ug/L 1.0 108 70 130 Naphthalene 9.4 ug/L 1.0 94 70 130 o-Xylene 9.3 ug/L 1.0 93 70 130 Toluene 9.8 ug/L 1.0 98 70 130 Xylenes, Total 29 ug/L 1.0 97 70 130 Surr: 1,2-0ichlorobenzene-d4 1.0 99 80 120 Surr: Oibromofluoromethane 1.0 104 70 130 Surr: p-Bromofluorobenzene 1.0 101 80 130 Surr: Toluene-d8 1.0 101 80 120 Sample 10: 121010_MBlK_6 16 Method Blank Run: SATURNCA_l 0121 OA 12/10/10 14:48 Acetone NO ug/L 20 Benzene NO ug/L 1.0 Carbon tetrachloride NO ug/L 1.0 Chloroform NO ug/L 1.0 Chloromethane NO ug/L 1.0 m+p-Xylenes NO ug/L 1.0 Methyl ethyl ketone NO ug/L 20 Methylene chloride NO ug/L 1.0 Naphthalene NO ug/L 1.0 o-Xylene NO ug/L 1.0 Toluene NO ug/L 1.0 Xylenes, Total NO ug/L 1.0 Surr: 1,2-0ichlorobenzene-d4 1.0 99 80 120 Surr: Oibromofluoromethane 1.0 104 70 130 Surr: p-Bromofluorobenzene 1.0 101 80 120 Surr: Toluene-d8 1.0 98 80 120 Sample 10: C10120230-008BMS 16 Sample Matrix Spike Run : SATURNCA_l 0121 OA 1211 0/1 0 20 :52 Acetone 1300 ug/L 200 134 70 130 S Benzene 220 ug/L 10 110 70 130 Carbon tetrachloride 100 ug/L 10 102 70 130 Chloroform 110 ug/L 10 115 70 130 Chloromethane 92 ug/L 10 92 70 130 m+p-Xylenes 200 ug/L 10 102 70 130 Methyl ethyl ketone 1300 ug/L 200 126 70 130 Methylene chloride 110 ug/L 10 113 70 130 Naphthalene 110 ug/L 10 109 70 130 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MOC -Minimum detectable concentration S -Spike recovery outside of advisory limits. Page 19 of 22 EI\ERGY • ~·dJO}:.,oi\rc.I~J! S www.energylab.com AMly/k6I ExullMla SiIIu 1152 Helena, NT 877-472-D711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 866-&86-7175 • Rapid City, so 888-672-1225 • Colloge station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Revised Date: 02/23/11 Report Date: 01/10/11 Work Order: Cl0120105 Client: Denison Mines USA Corp Project: Semi-Annual Groundwater 2010 ---------------------------------------------------------- Analyte Count Result Units Method: SWB260B Sample 10: Cl0120230-00BBMS o-Xylene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene·d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Sample 10: C10120230-00BBMSO Acetone Benzene Carbon tetrachloride Chloroform Chloromethane m+p-Xylenes Methyl ethyl ketone Methylene chloride Naphthalene o-Xylene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Qualifiers: RL -Analyte reporting limit. 16 Sample Matrix Spike 100 ug/L 110 300 ug/L ug/L 16 Sample Matrix Spike Duplicate 1400 ug/L 220 ug/L 110 ug/L 110 ug/L 93 ug/L 200 ug/L 1300 ug/L 110 120 99 110 300 ug/L ug/L ug/L ug/L ug/L MOC -Minimum detectable concentration RL %REC Low limit High limit RPO RPOLImit Qual Batch: R140815 Run: SATURNCA_101210A 12/10/10 20 :52 10 100 70 130 10 104 70 130 10 101 70 130 1.0 100 80 120 1.0 112 70 130 1.0 103 80 120 1.0 96 80 120 Run: SATURNCA_l01210A 12/10/10 21 :28 200 139 70 130 3.5 20 S 10 106 70 130 1.5 20 10 109 70 130 6.4 20 10 115 70 130 0.0 20 10 93 70 130 0.9 20 10 102 70 130 0.0 20 200 132 70 130 4.3 20 S 10 114 70 130 1.1 20 10 116 70 130 6.7 20 10 99 70 130 1.2 20 10 112 70 130 6.9 20 10 101 70 130 0.4 20 1.0 106 80 120 0.0 10 1.0 116 70 130 0.0 10 1.0 104 80 120 0.0 10 1.0 98 80 120 0.0 10 NO -Not detected at the reporting limit. S -Spike recovery outside of advisory limits. Page 20 of 22 EN:RGY l /\il(.Jf~~'\I C1~'l-:' www.energylab.com AIIIfyIIt:M~SIIJa 1m Helena, MT 877-472-0711 • BIllings, MT 800-135-4489 . Casper, WY 888-235-0515 Gillette, WY .88-186-7175 • Rapid City, SD 188-&12-1225 . College Station, IX 888-690-2218 Workorder Receipt Checklist Denison Mines USA Corp IIIIIIII~ I~ I~I/ 1111111111 ~IIIIIIIIIIIIIII C10120105 Login completed by: Corinne Wagner Reviewed by: BL2000\kschroeder Reviewed Date: 12/7/2010 Shipping container/cooler in good condition? Custody seals intact on shipping container/cooler? Custody seals intact on sample bottles? Chain of custody present? Chain of custody signed when relinquished and received? Chain of custody agrees with sample labels? Samples in proper container/bottle? Sample containers intact? Sufficient sample volume for indicated test? All samples received within holding time? ContainerfTemp Blank temperature: Water -VOA vials have zero heads pace? Water -pH acceptable upon receipt? Contact and Corrective Action Comments: None Yes III Yes III Yes D Yes III Yes III Yes III Yes III Yes III Yes III Yes III 3°C On Ice Yes III Yes III Date Received: 12/3/2010 Received by: em No D No D No D No D No D No D No D No D No D No D No D No D Carrier name: Next Day Air Not Present D Not Present D Not Present III No VOA vials submitted D Not Applicable D Page 21 of 22 "U Q) co CD N N o --N N IIfJJI1il PLEASE PRINT (Provide as much information as posslb\e.J . Company Name: Project Name, PWS. Permit, Etc. Sample Origin EPNState Compliance: I I o e.{\.-, £OA ..1'1\',,,,,,(..5 SC.M\ 0.1\"'\10..\ b"t)v~"""","~e.r ~\O State: V'T" Yes ~ No 0 I I Report Mail Address: Po SOX' gOCt Contact Name: Phone/Fax: Email: Sampler: (Please Print) I I BIA.ut. i...u.. vr <Z"I ftll IZ.,YQ.A. ~-..\~e-r_ "il~ ~ 7t ~~:J.' l'-AA~r ""aU;J'lt..V I Invoice Address: -Invoice Contact & Phone: Purchase Order: Quote/Bottle Order: I I S. --"""-('; £)-. ..... tA Lv,.. Vi t..(~ 62 f2 '2'2.' l \ I I Special Report/Formats: $: 1~&I!Sl@[]@ ~rn@QD~rn® .. Contact ELI prior to ~Yl~fr Q ~ RUSH sample submittal ~O(l)~ for charges and Cooler IO(5}: ~fD;g ol (j) ~ Q [ R scheduling -See t): f*\(-._> 0 >.i\j UJ Instruction Page o DW 0 EDD/EDT(Eleclronic Data) Ben(/) ro $: C ullZ ::r: "0 o POTWMlWTP Format: 8'5:'5 ~ g ~ () c Comments: Receipt Temp :::l U .... « (/)!COI x ~ 0 --'3 °c o State: 0 LEVEL IV ~ Q)'~ c '§ ~ iii ll ~I,gO I--c (Y)N o Other: 0 NELAC ~ On Ice: EI'-ro ' ~ :::l :::l Q).~ Q) '5: .; l-S Zo..<CllirQ L.U 1: Custody Seal -§ >1 UJ as On Bottle @~ ~ (J) "0 en c On Cooler ~ H Intact cn N ~ en SAMPLE IDENTIFICATION Collection Collection MATRIX Signature 0 N (Name, Location. Interval, etc.) Date Time Match 1 ffiW..-36 12.-,-\ l> IOJIt.t.D .b-~ i ~ ~ 2 ~ r r~D 8\ o.~"" \2.-'~\b 3 ~ .~ Q) 7(&,., t'-. ~L)O fin n 4 "/ JI 5 1-= ~ 6 ~ 7 ~ ~ iD I;)..crc!:; 8 ~. 9 ~ ~ 10 o:::!l Custody RelinqurshIld by (pnnt); Dalemme: Slg/,t~ PtA/v-Receivod by (prllll): DSIe{Time: Signalure: __ l"r~oI\, ",,~ __ e.'" I"'~'\O \4)01\ Record Rdlnquisl1e<l by (print); DalerTlme: S'9i\atu~ Received by (print): Dalellime: Signalure. MUST be Signed 1~7;7,q}9'£ : uateJ t~j':wo 9:t:a :Signature: Sample Disposal: Return to Clieot: Lab Disposal: In certain circumstances, samples submitted to Energy Laboratories, Inc. may be subcontracted to other certified laboratories in order to complete the analysis requested. This serves as notice of this possibility. All sub-contract data will be clearly notated on your analytical report. Visit our web site at www.energylab.com for additional information, downloadable fee schedule, forms, and links. TabF Laboratory Analytical Reports -Accelerated Monitoring TabFl Laboratory Analytical Reports -Accelerated Monitoring October 2010 A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines October Monthly 1010330-001A Client Sample ID: MW-ll Collection Date: 10/20/2010 1210h Received Date: Method Used: Analytical Results Units: Jlg/L Dilution Factor: 1 Compound Tetrahydrofuran 10/22/2010 0940h SW8260C Surr: 1,2-Dich1oroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 Contact: Jo Ann Tischler Analyzed: 10/22/2010 1650h VOAs by GC/MS Method 8260C/S030C CAS Reporting Analytical Number Limit Result Qual 109-99-9 1.00 < 1.00 17060-07-0 77-144 107 460-00-4 80-123 101 1868-53-7 80-124 104 2037-26-5 80-125 101 Report Date: 11/3/2010 Page 4 of 19 All analyses applicable to the CW A, SDWA, and RCRA arc performed in accordance to NELAC protocols. Pertinenl sampling informalion is located on the attached COCo This report is provided for the exclusive usc of the addressee. Privileges of subsequenl use of the name of Lhis company or any member of ils staIr, or reproduction of this reporL in connection wjLh the advertisement, promotion or sale of any product or process, or in connecLion wil.h the rc:publication .oflh~srcport. for anypu':!'ose other than for the addressee will bc granted only on contact. This company accepts no responsibility except for the due performance of inspection andlor analysis in good f.ith EI\ERGY I 1"1 t ; (. ': i " I (. ~ , • www.energylab.com AHI1fIaI E.rcIIIIuI SIirw IIIZ Helena, NT 877-472-0711 • Bllllnp, NT 801·735·4488 • Casper, WY 118-235·0515 Gillatte, WY 818-888·7175 . Rapid City, SD 818·&72·1225 . Collage Station, TX 888-690·2218 lABORATORY ANALYTICAL REPORT Client: Project: Lab 10: Denison Mines USA Corp October Monthly Groundwater 2010 C1 01 00941·001 Client Sample 10: MW 11 Analyses METALS· DISSOLVED Manganese Report Definitions: Rl -Analyte reporting limit. aCl -Quality control limit. Result Units 141 ug/l Qualifiers Rl 10 Report Date: 11/12/10 Collection Date: 10/20/10 12:10 DateRecelved: 10/25/10 Matrix: Aqueous MCll QCl Method Analysis Date 1 By E200.B 10/26/1023:231 sml MCl -Maximum contaminant level. NO -Not detected at the reporting limit. Page 3 of 19 EI\ERGY I 1\ I ( • /<, ~. '-- www.energyleb.com IMIflIaI EaIIwIa au 1151 Helena, MT 877-472-0711 • Billings, MT 801-135-4488 • Casper, WY 888-235-0515 Gillette, WY 816-888-7175 · Rapid City, SD 888-172-1225 · Collage StatiDn, 1X 888-891-2218 LABORATORY ANALYTICAL REPORT Client: Project: Lab 10: Denison Mines USA Corp October Monthly Groundwater 2010 C1 01 00941-002 Client Sample 10: MW 14 Analyses PHYSICAL PROPERTIES pH Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. Result Units 7,70 s,u, Qualifiers Rl 0,01 Report Date: 11/12/10 Collection Date: 1 0/20/1 0 11: 10 DateReceived: 1 0/25/1 0 Matrix: Aqueous MCll QCl Method Analysis Date I By A4500-HB 10/26/1010:16/1r MCl -Maximum contaminant level. NO -Not detected at the reporting limit. Page 4 of 19 EI'ERGY . J\\ l{ >1, \ I ('j II' • Helena, MY 877-472-D711 • Billings, MY 801-735-4488 • Casper, ¥IV 888-235-D515 Gillette, ¥IV 81&-6B8-7175 • Rapid City, so 888-872-1225 • Collage station, 1X 888-890-2218 LABORATORY ANALYTICAL REPORT Client: Denison Mines USA Corp Project: LablD: October Monthly Groundwater 2010 C1 01 00941-003 Client Sample ID: MW 26 Analyses MAJOR IONS Chloride Nitrogen, Nitrate+Nltrlte as N PHYSICAL PROPERTIES pH METALS -DISSOLVED Uranium VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -QualiJy control limit. Result 52 0.4 7.82 37.5 ND NO ND 1000 NO ND 5.5 NO ND ND 106 116 105 101 o -RL increased due to sample matrix. Units mg/L mglL S.u. ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L %REC %REC %REC %REC Report Date: 11/12/10 Collection Date: 10/20/10 09:45 DateRecelved: 1 0/25/1 0 Matrix: Aqueous MCL! Qualifiers RL QCL Method Analysis Date 1 By A4500-CI B 10/26/10 12:05/1r 0.1 E353.2 11/03/10 16:38/ dc 0.Q1 A4500-H B 10/26/10 10:24/1r 0.30 E200.8 10/26/10 23:301 sml 20 SW8260B 11/03/10 04:591 ilr 1.0 SW8260B 11/03/10 04:591 ilr 1.0 SW8260B 11/03/10 04:59 I jlr D 200 SW8260B 11/02/10 16:00 I Jlr 1.0 SW8260B 11/03/1004:591 ilr 20 SW8260B 11/03/10 04:59 I ilr 1.0 SW8260B 11/03/10 04:591 ilr 1.0 SW8260B 11/03/1004:591 ilr 1.0 SW8260B 11/03/1004:591 ilr 1.0 SW8260B 11/03/10 04:591 ilr 80-120 SW8260B 11/03/10 04:591 ilr 70-130 SW8260B 11/03/1004:591 ilr 80-120 SW8260B 11/03/10 04:59 1 ilr 80-120 SW8260B 11/03/10 04:59 I ilr MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 5 of 19 EN:RGY I AH 11 .,\i( PI' • www.energyfab.com ~,.",..aa I. Huien., r.rr 877-412-071 t • Billings, r.rr 8111-735-4489 • Caspar, WV IIB-235-0515 Gillette, WY 81B-886-7175 • Rapid City, SD 888-172-1225 • Collage station, TX 888-&80-2218 LABORATORY ANALYTICAL REPORT Client: Denison Mines USA Corp Project: LabID: October Monthly Groundwater 2010 C1 01 00941-004 Client Sample ID: MW 30 Analyses MAJOR IONS Nitrogen, Nitrate+Nitrite as N METALS· DISSOLVED Selenium Report Definitions: Rl -Analyte reporting limit. aCl -Quality control limit. Result 15 32.4 o -Rl increased due to sample matrix. Units mgll ug/l Report Date: 11/12/10 Collection Date: 10/19/10 12:55 DateRecelved: 1 0/25/1 0 Matrix: Aqueous MCll Qualifiers Rl QCl Method Analysis Date 1 By 0 E353.2 11/03/10 16:41 Idc 5.0 E200.8 10/26/1023:361 sml MCl -Maximum contaminant level. NO • Not detected at the reporting limit. Page 6 of 19 EN:RGY I 1\ ~,-)I",\ /. I '-'!?J' , www.energyfab.com ~~Itru'1U Helena, MT 877-472-0711 • Billings, MT 800-735-4419 • Casper, WY 188-235-0515 Gillatte, WY 888-886-7175 • Rapid City, SD 888-172-1225 • Collage Station, TX 888-190-2218 LABORATORY ANALYTICAL REPORT Client: Project: LabID: Denison Mines USA Corp October Monthly Groundwater 2010 C1 01 00941-005 Client Sample ID: MW 31 Analyses MAJOR IONS Nitrogen, Nitrate+Nitrite as N Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result Units 20 mg/L D -Rl increased due 10 sample matrix. Report Date: 11/12/10 Collection Date: 10/19/10 14:50 DateRecelved: 1 0/25/1 0 Matrix: Aqueous MCL! Qualifiers RL QCL Method Analysis Date 1 By D E353.2 11/03/10 16:431 de MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 7 of 19 EN:RGY t 1\' ~ )1 ~,\ 11": 1 f J ( • www.energyiab.com ""'~"'ISI Helena, MT 877-472-0111 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 81&-888-1115 • Rapid City, SD 888-172-1225 • Collage Station, 1X 888-890-2218 LABORATORY ANALYTICAL REPORT Client: Denison Mines USA Corp Project: LabID: October Monthly Groundwater 2010 C1 01 00941-006 Client Sample ID: MW 65 Analyses MAJOR IONS Chloride Nitrogen, Nitrate+Nitrite as N PHYSICAL PROPERTIES pH METALS -DISSOLVED Uranium VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene XyJenes. Total Surr: 1,2-Dlchlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result 38 0.4 7.92 36.7 ND ND ND 740 ND ND 5.6 ND ND ND 102 116 113 100 D -RL increased due to sample matrix. Units mg/L mg/L S.u. ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L %REC %REC %REC %REC Report Date: 11/12/10 Collection Date: 10/20/10 09:45 DateRecelved: 1 0/25/1 0 Matrix: Aqueous MCL! Qualifiers RL QCl Method Analysis Date I By 1 A4500-CIB 10/26/10 12:07 Ilr 0.1 E353.2 11/03/10 16:54/dc 0.01 A4500-H B 10/26/10 10:32 Ilr 0.30 E200.8 10/27/10 00:11 I sml 20 SW8260B 11/02110 16:35 I jlr 1.0 SW8260B 11/02110 16:351 jlr 1.0 SW8260B 11/02110 16:351 jlr D 100 SW8260B 11/03/10 13:541 llr 1.0 SW8260B 11/02110 16:351 llr 20 SW8260B 11/02110 16:35 Illr 1.0 SW8260B 11/02110 16:351 jlr 1.0 SW8260B 11/02110 16:351 jlr 1.0 SW8260B 11/02110 16:351 jlr 1.0 SW8260B 11/02110 16:35 Illr 80-120 SW8260B 11/02110 16:351 jlr 70-130 SW8260B 11/02110 16:351 jlr 80-120 SW8260B 11/02110 16:351 jlr 80-120 SW8260B 11/02110 16:35 I jlr MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 8 of 19 A AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, UT 84115 (80 I) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines October Monthly 1010330-002A Client Sample ID: Trip Blank Collection Date: 10/20/2010 Received Date: Method Used: Analytical Results Units: J.1g/L Dilution Factor: 1 Compound Tetrahydrofuran 10/22/20100940h SW8260C Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 Contact: 10 Ann Tischler Analyzed: 10/22/2010 1753h VOAs by GC/MS Method 8260CI5030C CAS Reporting Analytical Number Limit Result Qual 109-99-9 l.00 < l.00 17060-07-0 77-144 105 460-00-4 80-123 104 1868-53-7 80-124 102 2037-26-5 80-125 101 Report Date: 11/3/2010 Page 5 of 19 All analyses applicable to lhe CWA, SDWA, and RCRA are performed in accordancc to NELAC protocols. Pertinenl sampling informalion is located on IIU,,,UIIChcd CO . TIlis ",pori is provided for the exclusive use of the addressee. PriviJeges of subsequent usc of the name of tbis company or any member of ils 5laff. or reproduction of this reporl in connection with the advcrtl$cmcnl, I"romotion or s11lc ornny product or process, or in connection with the r~:public.tion ofth~sreporl. for any purpose olher than for the addressee will be granted only on contact. This company accepts no responsibility except for Ibe due pcrfonnnncc orinspection andlor analysis in good faith EN:RGY I II" \(.', ;;\, )f l ! • www.energylab.com Alll/ytlQI ~ SbIu '152 Helena, lIT 877-472-0711 • BIllings, lIT BOO-135-4488 • Casper, WY 888-235-0515 Gillette, WY 11B-18&-7175 • Rapid City, SD .18-172-1225 • Collaga Station, 1X 181-890-2218 LABORATORY ANALYTICAL REPORT Client: Denison Mines USA Corp Project: LabID: October Monthly Groundwater 2010 C1 01 00941-007 Client Sample ID: Trip Blank Analyses VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-dB Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. Result Units NO ug/l NO ug/l NO ug/l NO ug/l NO ug/l NO ug/l NO ug/l NO ug/l NO ug/l NO ug/l 10B %REC 129 %REC 115 %REC 103 %REC Qualifiers RL 20 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 BO-120 70-130 80-120 BO-120 Report Date: 11/12/10 Collection Date: 10/20/10 DateRecelved: 1 0/25/1 0 Matrix: Aqueous MCll QCl Method Analysis Date 1 By SW8260B 11/02110 22:271 )Ir SW8260B 11/02110 22:271 )Ir SW8260B 11/02110 22:271 )Ir SW8260B 11/02110 22:271 )Ir SW8260B 11/02110 22:271 jlr SW8260B 11/02110 22:271 )Ir SW8260B 11/02110 22:271 )Ir SW8260B 11/02110 22:27 1 )Ir SW8260B 11/02110 22:27 1 jlr SW8260B 11/02110 22:27 1 )Ir SWB260B 11/02110 22:271 )Ir SW8260B 11/0211022:271 )Ir SW8260B 11/0211022:271 )Ir SW8260B 11/02110 22:271 )Ir MCl -Maximum contaminant level. ND • Not detected at the reporting limit. Page 9 of 19 EN:RGY ~ ,\·'OI~/\I (,fd' , www.energylab.com AIfI1/II:M EIaIINa SIIIa IISI Helena, MT 871-472-D711 • Billings, MY 80D-735-4419 • Caspor, WI( 888-235-D515 Gillatte, 'ltV 11&-188-7175 • Rapid City, SD 888-&72-1225 • Colloge Station, 1X 888-69D-2218 LABORATORY ANALYTICAL REPORT Client: Project: LabID: Denison Mines USA Corp October Monthly Groundwater 2010 C 10100941-008 Client Sample ID: Temp Blank Analyses PHYSICAL PROPERTIES Temperature Report Definitions: Rl -Analyte reporting limit. QCl -Quality control II mil. Result Units 4.0 Qualifiers Rl Report Date: 11/12/10 Collection Date: 10/20/10 DateRecelved: 1 0/25/1 0 Matrix: Aqueous MCll QCl Method Analysis Date 1 By E170.1 10/25/10 08:451 kbh MCl -Maximum contaminant level. NO -Not detected at the reporting limit. Page 10 of 19 A Jo Ann Tischler Denison Mines 1050 17th Street, # 950 AMERICAN Denver, CO 80265 WEST TEL: (303) 389-4132 ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-Iabs.com Kyle F. Gross Laboratory Director RE: October Monthly Dear Jo Ann Tischler: Lab Set ID: 1010330 American West Analytical Laboratories received 2 sample(s) on 1012212010 for the analyses presented in the following report. All analyses were performed in accordance to The NELAC Institute protocols unless noted otherwise. American West Analytical Laboratories is certified by The NELAC Institute in Utah and Texas; and is state certified in Colorado and Idaho. Certification document is available upon request. If you have any questions or concerns regarding this report please feel free to call. The abbreviation "Surr" found in organic reports indicates a surrogate compound that is intentionally added by the laboratory to determine sample injection, extraction, and/or purging efficiency. The "Reporting Limit" found on the report is equivalent to the practical quantitaion limit (PQL). This is the minimum concentration that can be reported by the method referenced and the sample matrix. The reporting limit must not be confused with any regulatory limit. Analytical results are reported to three significant figures for quality control and calculation purposes. Jose Rocha Thank You, QA Officer K Y I e F. g~:I~~~~~~e:. ~:~~ :~A~o;t ou=AWAL. email=kyle@awal- G labs.com, c=US ross 001.:2010.110407:33:30-06'00' Approved by: '--__________ --l Laboratory Director or designee Report Date: 1113/2010 Page 1 of 19 All analyses applicable 10 the CWA, SDW A, and RCRA are performed in accordance to NELAC protocols. Pertinent sampling information is located on the attached CDC. This report is provided for the exclusive use of the addressee. Privileges of subsequent use of the name of this company or any member or its staff, or reproduction or this report in connection with the advertisement, promotion or sale of any product or process, or in connection wil~ the n::pubJic~ljon ofth~s.rcpart. far a.ny 'pu~ose olher than for the addressee will be granted anly on corttacL This company accepls no responsibility cxcepL for the due perfonnance of inspection and/or analysis in good faith A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Client: Project: Lab Set ID: Date Received: Lab Sample ID 1010330-001A 1010330-002A SAMPLE SUMMARY Denison Mines October Monthly 1010330 10/22/20 I 0 0940h Client Sample ID MW-l1 Trip Blank Date Collected 10/20/201 1210h 10/20/201 Contact: Jo Ann Tischler Matrix Aqueous Aqueous Analysis VOA by GCIMS Method 8260C/5030C VOAbyGCIMS Method 8260C/5030C Report Date: 1113/2010 Page 2 of19 All analyscs applicable lo thc CW II, SDWII, and RCRA arc perfomled in accordance lo NELAC protocols. Pertinenl sampling infomlalion is localed on lhc altached cae. This report is provided for the cxclusive usc of lhe addressee. Privileges of subsequent use of the name of this company or any member of its staff, or reproducLion of this report in connection with the advertisement, promotion or sale of any product or process, or in connection wit.h Lhe re.-public~lion .oflh~s.report. for a~y 'pu'!'ose other than for the addressee will be granted only on contact. This company accepts no responsibility cxcepl for the due pcrfonnancc of inspection and/or analysis in good faith A AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer VolatHe Case Narrative Client: Contact: Denison Mines JoAnn Tischler Project: Lab Set ID: Sample Receipt Information: Date of Receipt: Date of Collection: Sample Condition: C-O-C Discrepancies: Method: Analysis: 3rd Quarter Ground Water 1010330 10/22/2010 10/20/2010 Intact None SW-8468260C/5030C Tetrahydrofuran General Set Comments: Tetrahydrofuran was not observed above reporting limits. Holding Time and Preservation Requirements: All samples were received in appropriate containers and properly preserved. The analysis and preparation of all samples were performed within the method holding times following the methods stated on the analytical reports. Analytical QC Requirements: All instrument calibration and calibration check requirements were met. All internal standard recoveries met method criterion. Batch QC Requirements: MB, LCS, MS, MSD, RPD, and Surrogates: Method Blanks (MBs): No target analytes were detected above reporting limits, indicating that the procedure was free from contamination. Laboratory Control Sample (LCSs): All LCS recoveries were within control limits, indicating that the preparation and analysis were in control. Matrix Spike I Matrix Spike Duplicate (MS/MSD): All percent recoveries and RPDs (Relative Percent Differences) were inside established limits, indicating no apparent matrix interferences. Surrogates: All surrogate recoveries were within established limits. Corrective Action: None required. Report Date: 11/3/2010 Page 3 of 19 All analyscs applicable to the CW II, SDWA, and RCRA are perfonncd in accordance to NELIIC protocols. Pertinent sampling infonnation is located on the attached COCo This report is provided for the exclusive use of the addressee. PriviJegcs of subsequenl use of the name orthis company or any member arits staff, or reproduction orthis report in conneclion wilh the advertisemenl, promotion or sale of any product or process, or in connection wit.h Lhe r~:public~tion .ofLh~s_report_ for a.ny pU'P0se other than for the addressee will be granted only on contact. This company accepts no responsibility except for the duc performance of inspection andlor analysis in good faith A Client: Denison Mines Lab Set ID: 1010330 Project: October Monthly Sample ID Analyte LCS VOC 102210A Tetrahydrofuran LCS VOC 102210A SUIT: 1,2-Dichloroethane-d4 LCS VOC 102210A SUIT: 4-Bromofluorobenzene LCS VOC 102210A SUIT: Dibromofluoromethane LCS VOC 10221 OA SUIT: To1uene-d8 AMERlCAN WEST ANALYTICAL LABORATORlES 463 West 3600 South Units 11g!L %REC %REC %REC %REC Salt Lake City, ur 84115 (801) 263-8686, Toll Free (888) 263-8686, Fax (801) 263-8687 e-mail: awal@awal-labs.com, web: www.awal-labs.com C SUMMARY REPORT Dept: MSVOA QC Type: LCS Amount Original Method Result Spiked Amount %REC SW8260C 15.7 20.00 0 78.6 SW8260C 49.3 50.00 98.6 SW8260C 48.4 50.00 96.7 SW8260C 50.1 50.00 100 SW8260C 49.8 50.00 99.5 Limits 43-146 69-132 85-118 80-120 81-120 Kyle F. Gross Laboratory Director Jose Rocha QA Officer %RPD RPD Limit Qualifiers Analysis Date 10/22/2010 10/2212010 10/22/2010 10/22/2010 10/22/2010 Report Date: 11/3/2010 Page 6 of19 All analyses applicable to the: cw A, SDWA, and RCRA arc performed in accordance to NELAC protocols. Pertinent sampling infonnatian is located on the attached COCo This report is provided for the exclusive use of the addrcsscc. Privileges of subsequent usc: of the name of this company or any member of its staff, or roproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection with the Tc-publication of this report for any purposc other than for the addressee will bc grantcd only on contact. This compaJ'ly accepts no responsibility except for the: due performance ofinspcclion and/or analysis in good A Client: Denison Mines Lab Set ID: 1010330 Project: October Monthly Sample ID Analyte MB VOC 102210A Tetrahydrofuran MB VOC 102210A SUIT: 1,2-Dichloroethane-d4 MB VOC 102210A Surr:4-Bromofluorobenzene MB VOC 102210A Surr: Dibromofluoromethane MB VOC 102210A SUIT: Toluene-d8 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Units ~glL %REC %REC %REC %REC Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 263-8686, Fax (801) 263-8687 e-mail: awal@awal-Iabs.com, web: www.awal-IabS.com C SUMMARY REPORT Dept: MSVOA QC Type: :MBLK Amount Original Method Result Spiked Amount %REC SW8260C < 1.00 SW8260C 51.6 50.00 103 SW8260C 50.8 50.00 102 SW8260C 50.1 50.00 100 SW8260C 51.3 50.00 103 Limits 69-132 85-118 80-120 81-120 Kyle F. Gross Laboratory Director Jose Rocha QA Officer Analysis %RPD RPD Limit Qualifiers Date 10/22/2010 10122/2010 10/22/2010 10/22/2010 10/22/2010 Report Date: 1113/20 10 Page 7 ofl9 AU analyses applicable to the CWA, SOWAI and RCRA are performed in accordance 10 NELAe protocols. Pcninent sampling information is located on the attached cac. This report is provided for the exclusive usc oftbc addressee. Privileges of subsequent usc of the name of this company or any member of its staff. or reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection with the rc-publication ofthis report for any purpose other than for the addressee win be granted only on contact. This company accepts no responsibility except for the due perfonnance of inspection and/or analysis in good A Client: Denison Mines Lab Set ID: 1010330 Project: October Monthly Sample ID Analyte 10 I 0312-005FM S Tetrahydrofuran 1010312-005FMS Surr: 1,2-Dich1oroethane-d4 1010312-005FMS SUIT: 4-Bromofluorobenzene lOI0312-005FMS Surr: Dibromofluoromethane 1010312-005FMS SUIT: To1uene-d8 1010324-001AMS Tetrahydrofuran 101 0324-00 lAMS Surr: 1,2-Dich1oroethane-d4 lOI0324-001AMS Surr:4-Bromofluorobenzene 1010324-001AMS Surr: Dibromofluoromethane 1010324-OO1AMS Surr: Toluene-d8 1010330-001AMS Tetrahydrofuran 1010330-001AMS SUIT: 1,2-Dichloroethane-d4 1010330-001AMS Surr: 4-Bromofluorobenzene 1010330-001AMS Surr: Dibromofluoromethane 1010330-001AMS Surr: Toluene-d8 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Units ).lg/L %REC %REC %REC %REC ).lg/L %REC %REC %REC %REC ).lg/L %REC %REC %REC %REC Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 263-8686, Fax (801) 263-8687 e-mail: awal@awal-Iabs.com, web: www.awal-labs.com C SUMMARY REPORT Dept: MSVOA QCType: MS Amount Original Method Result Spiked Amount %REC SW8260C 20.2 20.00 0 101 SW8260C 53.0 50.00 106 SW8260C 48.0 50.00 95.9 SW8260C 51.0 50.00 102 SW8260C 48.2 50.00 96.3 SW8260C 18.7 20.00 0 93.3 SW8260C 52.9 50.00 106 SW8260C 47.6 50.00 95.2 SW8260C 51.6 50.00 103 SW8260C 47.9 50.00 95.8 SW8260C 20.8 20.00 0 104 SW8260C 525 50.00 105 SW8260C 48.9 50.00 97.9 SW8260C 50.6 50.00 101 SW8260C 48.3 50.00 96.7 Limits 43-146 77-144 80-123 80-124 80-125 43-146 77-144 80-123 80-124 80-125 43-146 77-144 80-123 80-124 80-125 Kyle F. Gross Laboratory Director Jose Rocha QA Officer %RPD RPD Limit Qualifiers Analysis Date 10/22/2010 10/22/2010 10/22/2010 10/22/2010 10/22/2010 10/22/2010 10/22/2010 10/22/2010 10/22/2010 10/22/2010 10/22/2010 10/22/2010 10122/2010 10/22/2010 10122/2010 Report Date: 11/3/2010 Page 8 of 19 All analyses applicable to the CWA, SOW A, and RCRA arc pcrfonncd in accordance to NELAC protocols. Pertinent sampling infonnation is located on the attached COCo This report is provided for the exclusive usc of the addressee. Privileges of subsequent usc of the name of this company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion o'("Sale of any product or process, or in connection with the: re-publication of this report for any purpose other than for the addressee will be gr.mtcd only on contact This company accepts no responsibility except for the due pe:rl'orrnance ofinspcction and/or analysis in good A Client: Denison Mines Lab Set ID: 1010330 Project: October Monthly Sample ID Analyte 1010312-005FMSD Tetrahydrofuran 1010312-005FMSD Surr: 1,2-Dichloroethane-d4 1010312-005FMSD Surr: 4-Bromofluorobenzene 101 0312-005FMSD Surr: Dibromofluoromethane 1010312-005FMSD Surr: Toluene-d8 1010324-001AMSD Tetrahydrofuran 1010324-001AMSD Surr: 1,2-Dichloroethane-d4 1010324-001AMSD Surr:4-Brornofluorobenzene 1010324-001AMSD Surr: Dibrornofluorornethane 1010324-001AMSD Surr: Toluene-d8 1010330-001AMSD Tetrahydrofuran 1010330-001AMSD Surr: 1,2-Dichloroethane-d4 10l0330-001AMSD Surr: 4-Brornofluorobenzene 1010330-001AMSD Surr: Dibrornofluorornethane 10l0330-001AMSD Surr: Toluene-d8 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Units )lg/L %REC %REC %REC %REC Ilg/L %REC %REC %REC %REC Ilg/L %REC %REC %REC %REC Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 263-8686, Fax (801) 263-8687 e-mail: awal@awal-Iabs.com, web: www.awal-labS.com C SUMMARY REPORT Dept: MSVOA QCType: MSD Amount Original Method Result Spiked Amount %REC SW8260C 20.1 20.00 0 100 SW8260C 52.0 50.00 104 SW8260C 48.5 50.00 97.0 SW8260C 50.6 50.00 101 SW8260C 48.3 50.00 96.5 SW8260C 20.0 20.00 0 100 SW8260C 52.3 50.00 105 SW8260C 48.1 50.00 96.2 SW8260C 50.9 50.00 102 SW8260C 48.2 50.00 96.3 SW8260C 21.4 20.00 0 107 SW8260C 52.0 50.00 104 SW8260C 49.0 50.00 98.1 SW8260C 50.7 50.00 101 SW8260C 48.6 50.00 97.1 Limits 43-146 77-144 80-123 80-124 80-125 43-146 77-144 80-123 80-124 80-125 43-146 77-144 80-123 80-124 80-125 Kyle F. Gross Laboratory Director Jose Rocha QA Officer %RPD RPD Limit Qualifiers 0.646 25 7.13 25 2.74 25 Analysis Date 10/22/2010 10122/2010 10/22/2010 10/22/2010 10/22/2010 10/22/2010 10/22/2010 10/22/2010 10/22/2010 10/22/2010 10/22/2010 10122/2010 10/22/2010 10/22/2010 10/22/2010 Report Date: 11/3/2010 Page 9 of19 All analyses applicable to the CWA, SDWA, and ReRA arc pcrfonncd in accordance to NELAe protocols. PCTtinent sampling information is located on the attached COCo This report is provided for the exclusive usc of the addressee. Privileges of subsequent usc of the name of this company or any member of its staff, or reproduction ofthi5 report in connection with the advertisement, promotion or sale or any product or process, or in connection with thc re-publieation of this report for any purpose other than for the addressee will be granted only on contact. This company accepts no responsibility except for the due pcrfonnanee of inspection and/or analysis in good Data Path Data File Acq On Operator Sample Misc ALS Vial Quantitation Repor t C:\msdchem\1\DATA\OCT10-C\220CT10A\ S86L3301. D 22 Oct 2010 4:50 pm 1010330-001A SAMP 5.0ML 10F3 16 Sample Multiplier: 1 Quant Time: Oct 22 22:05:42 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_20.M Quant Title VOA Calibration QLast Update: Thu Oct 21 17:05:24 2010 Response via : Initial Calibration (QT Reviewed) l4J)undance 1100000 TIC: S8SL3301 .0\data.ms 1050000 1000000 .,; 950000 ~ ~ Q) I?! .23 e 900000 .2 .r= 850000 (.) ... ~ "0 '" !Q " ~ " 800000 Of il e " 0 ~ :2 " " ~ is .... 0 750000 => 0 u: UI ~ 0 ~ \a Q) N " 700000 .ll 650000 sooooo i g e 550000 500000 450000 400000 350000 rn ~ t '" .2! ~ ~ E e 0 0 il => q: is 0 E N. e 300000 ~ t:: :> ~ rn rn 250000 200000 150000 100000 Q) " 0 a 50000 « -'" It. o 1 '-L L L . 1 } . .1 [flme->c __ -:2.,-=-op 2.50 3.0Q 3.50 4.00 4.50 ~,Q!L.§.~.O 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50 10.00 10.50 11.00 ".~ AFULLW_20.M Fri Oct 22 22:05:54 2010 Report Date: 11/3/2cfl~gtpage10 of 19 Data Path Data File Acq On Operator Sample Misc ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via Quantitation Report C:\msdchem\1\DATA\OCTI0-C\220CTI0A\ S89L3302.D 22 Oct 2010 5 :53 pm 1010330-002A SAMP 5.0ML 10F3 18 Sample Multiplier: 1 Oct 22 22:08:44 2010 C:\MSDCHEM\1\METHODS\AFULLW_20.M VOA Calibration Thu Oct 21 17:05:24 2010 Initial Calibration (QT Reviewed) e f bundanc 11.0.0.0.0.0 --TIC: S89L33D2.0\data.ms 1.05.0.0.0.0 1.0.0.0.0.0.0 95.0.0.0.0 9.0.00.0.0 85.0.0.0.0 ~ ~ 8.0.0.0.0.0 ~ 0 " u: 75.0.0.00 0 ~ 70.0.0.0.0 650000 6.000.0.0 55.0.00.0 5.0.0.0.0.0 450.0.0.0 m 4.000.0.0 <Ii m. e: '" III .t::. e: "iii ~ E ~ !e 35.0.0.00 g .Q .t::. '5 .!.l E 0 !e "t .D is t: 3.0.0.0.0.0 t: " " m m 250000 2.0.0000 15.0.0.0.0 100.0.0.0 5.0.0.00 ~ .0 l lme-> __ 2 . .0.0 2.5.0 ~·9Q ~.~9 4.09 I-4.5L5.~ 5.50 AFULLW_20.M Fri Oct 22 22:09:14 2010 lft ~ III ;' ~ ~ ~ .Q III .t::. ~ U III 0 1l !a .Q .t::. .Y 0 <t I ~ t c I I!! ~ ~ 1- <{ 0 ;;; 0> U ~ ~ 6.DQ-P.5D 7 . .0.0 7JiD 8 . .0.0 8.5.0 9 • .0.0 9.5.0 10~DO 1D~50 11 ~.oD 11 ~5o.. Report Date: 1lI3/2010g.lige'11 of 19 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\DATA\OCT10-C\220CT10A\ S72LCS20.D 22 Oct 2010 12:24 pm LCS VOC 102210A LCS SEE COVERSHEET FOR ID AND AMOUNTS 3 Sample Multiplier: 1 Quant Time: Oct 22 12:36:46 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_20.M Quant Title VOA Calibration QLast Update: Thu Oct 21 17:05:24 2010 Response via : Initial Calibration (Not Reviewed) r. bundance TIC: S72LCS20.D\data.ms 2100000 2000000 ~ I 1900000 1800000 1700000 1600000 1500000 1400000 1300000 1200000 1100000 1000000 900000 800000 AFULLW_20.M Fri Oct 22 12:49:37 2010 Report Date: 11I3/2(jH)g~age42 of19 Quantitat i on Report C:\msdchem\1\DATA\OCT10-C\220CT10A\ S74LMBLK.D 22 Oct 2010 1:02 pm Data Path Data File Acq On Operator Sample Misc MB VOC 102210A ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via MBLK 5. OML 5 Sample Multiplier: 1 Oct 25 13:29:44 2010 C:\MSDCHEM\1\METHODS\AFULLW_20.M VOA Calibration : Thu Oct 21 17:05:24 2010 : Initial Calibration (QT Reviewed) r bundance --TIC: S74LMBLK-.-O\data,ms 1200000 1150000 1100000 1050000 <Ii '0 " c: Q) 1000000 ~ ;, ~ ~ 0 c: :l'" Q) U ~ 950000 900000 ~ .2l 2 .Q 1 .c: Q) is ~ .to 850000 ~ 0 ~ ~ 800000 ~ 750000 700000 i c .§ 650000 g i sooooo 550000 500000 450000 400000 350000 <Il. C/) Q) ~ ~ 'iii ~ E 2 .!l g i3 'E ;:;; E ~ "! -" t: is :> t: C/) :> 300000 C/) 250000 200000 150000 100000 50000 '-.... o I I I I I I I I me-> 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50_6.QL/?5Q --LOQ.......l'§Q 8-,-00 J 50 31.00 9.@ 10.00 10.50 11 .~1.~ , , AFULLW_20.M Mon Oct 25 13:30:01 2010 Report Date: 11/3/2<flDg'Page'i30f19 Quantitation Report Data Path Data File Acq On Operator Sample Misc C:\msdchem\l\DATA\OCTlO-C\220CT10A\ S91S3125.D ALS Vial 22 Oct 2010 6:31 pm 1010312-005FMS MS 5.0ML 10F3 20 Sample Multiplier: 1 Quant Time: Oct 22 18:43:04 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_20.M Quant Title VOA Calibration QLast Update Thu Oct 21 17:05:24 2010 Response via Initial Calibration 1800000 1700000 1500000 1400000 1300000 1200000 1100000 1000000 I AFULLW_20.M Fri Oct 22 22:12:12 2010 ut 00 ." " " OJ i (Not Reviewed) ~ ~ " t! ~ .Q .c .\1 0 .t. ~ !!l (/). ~ Q) I til d::I .. QI) '" (,) Report Date: 11/3/2!Hijg"age'l4of19 Data Path Data File Acq On Operator Sample Misc ALS Vial Quantitation Report C:\msdchem\1\OATA\OCT10-C\220CT10A\ S96S3241.0 22 Oct 2010 8:05 pm 1010324-001AMS MS 5.0ML 10F3 24 Sample Multiplier: 1 Quant Time: Oct 22 20:17:34 2010 Quant Method C:\MSOCHEM\1\METHODS\AFULLW_20.M Quant Title VOA Calibration QLast Update Thu Oct 21 17:05:24 2010 Response via Initial Calibration (Not Reviewed) ! bundance TIC: S96S3241 .0\dala.ms 1700000 1600000 1500000 1400000 1200000 E I ~ d " ~Ii c: " €I: ~ )" .,ti~· of .2! :il:ii :ii .r: 1» ~.s 10 >.:H E £; ~o E! W "0 .Q .Q .r: tl AFULLW_20.M Fri Oct 22 22:25:36 2010 ~ I J i . i~ ~ .: I ~ j Report Date: 11/3/2(ftijglPage1S of 19 Quantitation Report C:\msdchem\1\DATA\OCT10-C\220CT10A\ S87S3301.D 22 Oct 2010 5:13 pm 1010330-001AMS Data Path Data File Acq On Operator Sample Misc ALS Vial MS 5.0ML 10F3 17 Sample Multiplier: 1 Quant Time: Quant Method Quant Title QLast Update Response via Oct 22 17:25:09 2010 C:\MSDCHEM\1\METHODS\AFULLW_20.M VOA Calibration Thu Oct 21 17:05:24 2010 Initial Calibration (Not Reviewed) ~bundance TIC: SB7S3301.D\data.ms 1500000 1400000 J AFULLW_20.M Fri Oct 22 22:06:33 2010 Report Date: 11/3/2!flOgIPage16of19 Data Path Data File Acq On Operator Sample Misc ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via 1800000 1700000 1600000 1500000 1400000 1300000 1200000 1100000 1000000 900000 600000 500000 200000 100000 Quant itation Report C:\msdchem\l\DATA\OCTlO-C\220CT10A\ S92D3125.D 22 Oct 2010 6:50 pm 1010312-005FMSD MSD 5.0ML 10F3 20 Sample Multiplier: 1 Oct 22 19:02:01 2010 C:\MSDCHEM\1\METHODS\AFULLW_20.M VOA Calibration Thu Oct 21 17:05:24 2010 Initial Calibration (Not Revi ewed) c: S9203125.0Idata.ms ~ ~ i!l c: ~ .S1 :\i i a "'- " @ " ~ ~ c: .,; I 3, i Cll. " to 2! ~ ~ is "t l !!! !i Q ~ ., m ~ 31.2 ~ )~ ~ .c' ~ CD(J jl ~2 ~ !,g -651 ~ ~ ~~~ ~t' .g s ~~ a ::!: U1 ()~ ,g ~ AFULLW_20.M Fri Oct 22 22:12:46 2010 ., .~ " I ~ ~ .S1 I :§ ~ ~ .c ~ l!<'i I .: :E~ lit z j Report Date: 11/3/2(fl~g.age17 of19 Quantitation Report C:\msdchem\1\OATA\OCTI0-C\220CTI0A\ S9603241.0 22 Oct 2010 8:24 pm 1010324-001AMSO Data Path Data File Acq On Operator Sample Misc MSO 5.0ML 10F3 ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via 24 Sample Multiplier: 1 Oct 22 20:36:31 2010 C:\MSOCHEM\1\METHOOS\AFULLW_20.M VOA Calibration Thu Oct 21 17:05:24 2010 Initial Calibration (Not Reviewed) !Abundance TIC: S96D3241 .0ldata.ms 1800000 1600000 1500000 ~ ., " ., ~ ., .0 ~ .Q -" ,9 0 "!. .t. 1300000 ~ ~ ~ J 1100000 1000000 i i ~ ~ AFULLW_20.M Fri Oct 22 22:24:53 2010 Report Date: 11/3/2cH09ipage1S of19 Data Path Data File Acq On Operator Sample Misc ALS Vial Quantitation Report C:\msdchem\1\DATA\OCT10-C\220CT10A\ S88D3301.D 22 Oct 2010 5:34 pm 1010330-001AMSD MSD 5.0ML 10F3 17 Sample Multiplier: 1 Quant Time: Oct 22 17:46:08 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_20.M Quant Title VOA Calibration QLast Update Thu Oct 21 17:05:24 2010 Response via Initial Calibration (Not Revi ewed) --TIC: S8803301 .0\data.ms 1 BOOOOO 1700000 1600000 1500000 1400000 1300000 1200000 1100000 1000000 900000 I I BOOOOO 700000 600000 500000 400000 '" c <.> Ii 300000 of Jl c i ~~ .au .g 200000 ~ i~ U~ ~ ~~ " E ~J ill (3-8 .!2 J 100000 l ime-> AFULLW_20.M Fri Oct 22 22:06:58 2010 Report Date: 11I3/2010gipage490f19 American West Analytical Laboratories WORK ORDER Summary Work Order: 1010330 Client: Denison Mines Page 1 of 1 Client ID: DENlOO Contact: Jo Ann Tischler 1012212010 Project: October Monthly QC Level: LEVEL ill WO Type: Project Comments: No Hard Copies (UL). QC 3 & Summary. EDD-CSV. Report THF to ! tl.~~.; If ~ -+Io\?--M\ ~ Sample ID 'y--'--------------\. Client Sample ID Collected Date Received Date Date Due Matrix Test Code Sel Storage 1010330-001A MW-I1 101201201012:10:00 PM 10122120109:40:00 AM 111512010 Aqueous 8260-W 2] VOCFridge 3 1010330-002A Trip Blank 10/2012010 11/512010 8260-W 21 VOCFridge ! 0 I (j .33 (l Sheet 1 of 1 CHAIN OF CUSTODY Samples Shipped to: American West Analytical Lab 463 West 3600 South Contact: Ryan Palmer or David Turk Ph: 435 678 2221 Pro·eet October Monthly Sample 10 MW-11 trip blank Salt Lake City, Ut 84115 rpalmer@denisonmines.com dturk@denisonmines.com Chain of Custody/Sampling Analysis Request Sam lers Name Tanner Hollida Date Time Collected Collected · Laboratory Analysis Requested 10/20/2010 1210 THF THF THF THF THF THF Please nofify Ryan Palmer of RecieQt tempature; on these samples Immediately! Thank you . DatelTime Received By:(Signature) 10/21/2010 1230 DatelTime D~~ime (;(~ Lab SetID: l~ (Q.3:7 () - Samples Were: COC Tape Was: Container Type: No. Rec. c(Shipped By: (.,(1:95 Present on Outer Paclcage iJ":tt:W.AL Supplied Plastic o Hand Delivered 'f;.fYes ONo ON/A o A WAt-&wpIied Clear Glass o Ambient Un~loken on Oute)" package o A WAL SupP'He..d Amber G [ass piChilled ['j.Yes ONo DN/A . o A WAL SUPp[jed~rrox Vials Temperature .5:;; °e ( Present on Sample o Amber 0 Clear 0 Hea ce 0 No Headspace Rec. Broken/Leaking DYes ~No DN/A . DYes ONo ~N/A o NOll A WAL Supplied Cont~ Notes: , Unbroken on Simple Notes: ~ . 0 Yes 0 No t(N/A Properly Preserved 11Yes ONo ON/A Notes: I Notes: I Rec. Within Hold ~Yes DNo Discrepancies Between Labels and cae DYes Notes: I Notes: . '. . . ' . .. . .. . ' -= Bottle"JYpe--_ Preservative All pHs OK Ammonia , pH <1. n2 COD pH <2 HZS04 ----. , Cyanide PH>12 NaOH --:-:--..... Metals pH <2HNO, , . . . --r----' . N02 &NP3 pH <2 H2S04 ' -~ ---~ Nutrients pH <2 HzS04 -... --. ' . .. .. . ' O&G pH<2HCL ~, Phenols ~H <2H2S04 . --.. Sulfide pH> 9NaOH, ZnAC " ~ TKN pH <2 H2SO4 --...... TOe ' pH <2 H3P04 .. .~ T P04 pH <2 H2SO4 ~ TPH pH <2 HCL I .. Procedure: Pour a small amount of sample in the sample lid Pour sample from Lid gently over wide range pH paper 1) 2) 3) 4) 5) Do Not dip the pH paper in the sample botile or lid .' If sample is not-preserved properly list its extension and receiving pH in the appropriate column above ·6) 7) Flag COC and notrty client for further instructions . Place client conversation on CDC ' Samples may be adjusted at client request In.ro \ . ' r--.,. '" EN:RGY t " H " I' :111' www.energylab.com ~~stIIu'BZ Helen., MT 877-472-0711 • Billings, MT 801-735-4489 • Casper, WY 888-235-0515 Glilatta, WY 816-688-7175 • Rapid City, sa 888·172·1225 • College Station, TX 888-890-2218 ANALYTICAL SUMMARY REPORT November 12, 2010 Denison Mines USA Corp 6425 S Hwy 191 Blanding, UT 84511 Workorder No.: C10100941 Quote 10: C1640 -POC Wells Project Name: October Monthly Groundwater 2010 Energy Laboratories, Inc. received the following 8 samples for Denison Mines USA Corp on 10/25/2010 for analysis. Sample 10 Client Sample 10 Collect Date Receive Date Matrix Test C10100941-001 MW 11 10/20/10 12:10 10/25/10 C10100941-002 MW 14 10/20/1011 :10 10/25/10 C10100941-003 MW 26 10/20/10 09 :45 10/25/10 C10100941-004 MW 30 10/19/10 12:55 10/25/10 C10100941-005 MW 31 10/19/10 14:50 10/25/10 C10100941-006 MW 65 10/20/1009:45 10/25/10 C10100941-007 Trip Blank 10/20/10 00:00 10/25/10 C10100941-008 Temp Blank 10/20/1000:00 10/25/10 Aqueous Metals by ICP/lCPMS, Dissolved Aqueous pH Aqueous Metals by ICP/lCPMS, Dissolved Chloride Nitrogen, Nitrate + Nitrite pH SW8260B VOCs, Standard List Aqueous Metals by ICP/ICPMS, Dissolved Nitrogen, Nitrate + Nitrite Aqueous Nitrogen, Nitrate + Nitrite Aqueous Metals by ICP/ICPMS, Dissolved Chloride Nitrogen, Nitrate + Nitrite pH SW8260B VOCs, Standard List Aqueous SW8260B VOCs, Standard List Aqueous Temperature This report was prepared by Energy Laboratories, Inc., 2393 Salt Creek Hwy., Casper, WY 82601. Any exceptions or problems with the analyses are noted in the Laboratory Analytical Report, the QA/QC Summary Report, or the Case Narrative. The results as reported relate only to the item(s) submitted for testing. If you have any questions regarding these test results, please call. Report Approved By: c3¥~ £) LJtJ.~ Reporting Supervisor Digitally signed by Stephanie Waldrop Date: 2010.11.12 15:28:20 -07:00 Page 1 of 19 www.energylab.com ...,~arc.'1U Halena, MT 877-472-0711 • Billings, MT 801·735-4489 • Casper, WY 888-235-0515 Gilletta WY 886-688-7175 . Ra id C' SD 888-872-1225 . Colle a Station TX 888-690-2218 CLIENT: Denison Mines USA Corp Project: October Monthly Groundwater 2010 Report Date: 11/12/10 Sample Delivery Group: C1 01 00941 CASE NARRATIVE ORIGINAL SAMPLE SUBMIITAL(S) All original sample submittals have been returned with the data package. SAMPLE TEMPERATURE COMPLIANCE: 4"C (±2"C) Temperature of samples received may not be considered properly preserved by accepted standards. Samples that are hand delivered immediately after collection shall be considered acceptable if there is evidence that the chilling process has begun. GROSS ALPHA ANALYSIS Method 900.0 for gross alpha and gross beta is intended as a drinking water method for low TDS waters. Data provided by this method for non potable waters should be viewed as inconsistent. RADON IN AIR ANALYSIS The desired exposure time is 48 hours (2 days). The time delay in returning the canister to the laboratory for processing should be as short as possible to avoid excessive decay. Maximum recommended delay between end of exposure to beginning of counting should not exceed 8 days. SOIUSOLlD SAMPLES All samples reported on an as received basis unless otherwise indicated. ATRAZINE, SIMAZINE AND PCB ANALYSIS Data for PCBs, Atrazine and Simazine are reported from EPA 525.2. PCB data reported by ELI reflects the results for seven individual Aroclors. When the results for all seven are ND (not detected), the sample meets EPA compliance criteria for PCB monitoring. SUBCONTRACTING ANALYSIS Subcontracting of sample analyses to an outside laboratory may be required. If so, ENERGY LABORATORIES will utilize its branch laboratories or qualified contract laboratories for this service. Any such laboratories will be indicated within the Laboratory Analytical Report. BRANCH LABORATORY LOCATIONS eli-b -Energy Laboratories, Inc. -Billings, MT eli-g -Energy Laboratories, Inc. -Gillette, WY eli-h -Energy Laboratories, Inc. -Helena, MT eli-r -Energy Laboratories, Inc. -Rapid City, SD eli-t -Energy Laboratories, Inc. -College Station, TX CERTIFICATIONS: USEPA: WY00002, Radiochemical WY00937; FL-DOH NELAC: E87641, Radiochemical E871017; California: 02118CA; Oregon: WY200001; Utah: 3072350515; Virginia: 00057; Washington: C1903 ISO 17025 DISCLAIMER: The results of this Analytical Report relate only to the items submitted for analysis. ENERGY LABORATORIES, INC. -CASPER,WY certifies that certain method selections contained in this report meet requirements as set forth by the above accrediting authorities. Some results requested by the client may not be covered under these certifications. All analysis data to be submitted for regulatory enforcement should be certified In the sample state of origin. Please verify ELI's certification coverage by visiting www.energylab.com ELI appreciates the opportunity to provide you with this analytical service. For additional information and services visit our web page www.energylab.com. Page 2 of 19 EN:RGY 1 /\'\"')1./\1 -'''n' wwwJltlergylab.com AMITfJaI~SIIu 'flU Helena, MT 877-472-0711 • BIllings, MT 801-735-4489 • Casper, WY 888-235-0515 Gillatta, WY 18&-188-7175 • Rapid City, SD 888-&72-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Client: Denison Mines USA Corp Project: October Monthly Groundwater 2010 Analyte Count Result Units Method: A4500-CI B Sample 10: MBLK9-101026 Method Blank Chloride NO mg/L Sample 10: LCS35-101026 Laboratory Control Sample Chloride 3550 mg/L Sample 10: C10100941-006AMS Sample Matrix Spike Chloride 220 mg/L Sample 10: C10100941-006AMSO Sample Matrix Spike Duplicate Chloride 219 mg/L Qualifiers: RL • Analyte reporting limit. RL 0.5 1.0 1.0 1.0 Report Date: 11112/10 Work Order: C10100941 O/OREC Low Limit High Limit RPO RPOLimlt Qual Batch: 101026·CL·TTR·W Run: TITRATION_101026A 10/26/1 0 10:43 Run: TITRATION_101026A 1 0/26/1 0 11 :34 100 90 110 Run: TITRATION_101026A 10/26/10 12 :OS 103 90 110 Run: TITRATION_101026A 10/26/1012:10 102 90 110 O.S 10 NO • Not detected al the reporting limit. Page 11 of 19 EN:RGY I ,\1 )01 '/\1 <. I ~I: '_ www.energylab.com AlulytJQI Erf:""-SIneI ,m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 GiIIBita, WY 81&-888-7175 • Rapid City, SD 888-172-1225 • College Stalion, 1X 888-69D-2218 QA/QC Summary Report Client: Denison Mines USA Corp Project: October Monthly Groundwater 2010 Analyte Count Result Units Method: A4500-H B Report Date: 11/12/10 Work Order: C10100941 RL %REC Low limit High Limit RPO RPOLimit Qual Sample 10: ICV1_101026_1 pH Initial Calibration Verification Standard Analytical Run: ORION555A-2_101 026A 10/26/10 09 :08 Method: A45GO-H B Sample 10: C10100941-006AOUP pH Qualifiers: RL -Analyte reporting limit. 6.89 S.u. 0.010 100 Sample Duplicate 7.75 S.u. 0.010 98 102 Run: ORION555A-2_101026A 2.2 10/26/10 10:40 10 NO -Not detected at the reporting limit. Page 12 of 19 EN:RGY I 't'"l~), .f .... I f ~J l l ' ... www.enargyiab.com IMItIJaI~SiIU rm Helene, MT 877-472·D711 • Billings, MT BGI·735·4489 • Casper, WY 888·235·D515 Gilialte, WY 818-188·7175 • Rapid City, SD 818·172·1225 • Cotlege Statian, TX 888-690·2218 QA/QC Summary Report Client: Denison Mines USA Corp Project: October Monthly Groundwater 2010 Analyle Count Result Units Method: E200.8 SamplelD: C10100945-002BMS4 3 Sample Matrix Spike Manganese 0.0591 mg/L Selenium 0.0504 mg/L Uranium 0.0535 mg/L Sample 10: C10100945-D02BMSO 3 Sample Matrix Spike Duplicate Manganese 0.0605 mg/L Selenium 0.0511 mg/L Uranium 0.0536 mg/L Sample 10: LRB 3 Method Blank Manganese 2E-05 mg/L Selenium NO mg/L Uranium NO mg/L Sample 10: LFB 3 Laboratory Fortified Blank Manganese 0.0518 mglL Selenium 0.0535 mg/L Uranium 0.0550 mg/L Qualifiers: RL -Analyte reporting limit. RL 0.010 0.0010 0.00030 0.010 0.0010 0.00030 2E-05 5E-05 8E-06 0.0010 0.0010 0.00030 Report Date: 11/12/10 Work Order: C 1 01 00941 %REC Low Limit High Limit RPO RPOLlmlt Qual Batch: R139049A Run: ICPMS4·C_101026A 10/27/10 00:38 99 70 130 101 70 130 104 70 130 Run: ICPMS4-C_101026A 10/27/1000:45 102 70 130 2.4 20 102 70 130 1.4 20 104 70 130 0.2 20 Run: ICPMS4-C_1 01 026A 10/26/10 13:12 Run: ICPMS4-C_101026A 10/26/10 13:19 104 85 115 107 85 115 110 85 115 ND -Not detected at the reporting limit. Page 13 of 19 EN:RGY I 1\ll' )j?,'"q r Pit • _.energylab.com .,.",. &nIIIIa sma 1m Helena, MT 877-472-0711 • Billings, MT 801-735-4419 • Casper, WY 888-235-0515 Gillatta, WY 81&-888-7175 • Rapid City, SD 888-112-1225 • College Station, 1X 888-680-2218 QA/QC Summary Report Client: Denison Mines USA Corp Project: October Monthly Groundwater 2010 Analyle Count Result Units Method: E353.2 Sample 10: MBLK-1 Method Blank Nitrogen, Nltrate+Nitrite as N ND mg/L Sample 10: LCS-2 Laboratory Control Sample Nitrogen, Nltrate+Nitrite as N 2.40 mg/L Sample 10: C10100941-o03CMS Sample Matrix Spike Nitrogen, Nitrate+Nitrite as N 2.38 mg/L Sample 10: C10100941-003CMSO Sample Matrix Spike Duplicate Nitrogen, Nltrate+Nitrite as N 2.39 mg/L Qualifiers: RL • Analyte reporting limit. RL 0.04 0.10 0.10 0.10 Report Date: 11/12/1 0 Work Order: C 1 01 00941 %REC Low Limit High Limit RPO RPOLimlt Qual Batch: R139419 Run: TECHNICON_l0ll03A 11/03/10 11 :58 Run: TECHNICON_l 011 03A 11/03/1012:01 96 90 110 Run: TECHNICON_l0l103A 11/03/10 16:46 100 90 110 Run: TECHNICON_l 011 03A 11/03/1016:48 101 90 110 0.4 10 ND • Not detected at the reporting limit. Page 14 of 19 EN:RGY I 1\·-hll ,/ •• {)f"ll www.energyiab.com IMfTtluI Ettt"-smc. 1m Halena, MT 877-472-0711 • Billings, MT aaD-735-4419 • Caspllt', 'NY 881-235-0515 Gillette, WY 88&-8BB-7175 . Rapid City, SD 888-172-1225 • Collage SlatiDn,1X 888-680-2218 QA/QC Summary Report Client: Denison Mines USA Corp Project: October Monthly Groundwater 2010 Analyte Count Result Units Method: SW8260B Sample 10: 02-Nov-10_LCS_4 16 Laboratory Control Sample Acetone 72 ug/L Benzene 9.4 ug/L Carbon tetrachloride 9.3 ug/L Chloroform 9.2 ug/L Chloromethane 10 ug/L m+p-Xylenes 19 ug/L Methyl ethyl ketone 160 ug/L Methylene chloride B.B ug/L Naphthalene B.2 ug/L o-Xylene B.9 ug/L Toluene 9.4 ug/L Xylenes, Total 2B ug/L Surr: l,2-Dichlorobenzene-d4 Surr: Olbromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-dB Sample 10: 02-Nov-10_MBLK_6 16 Method Blank Acetone NO ug/L Benzene NO ug/L Carbon tetrachloride NO ug/L Chloroform NO ug/L Chloromethane NO ug/L m+p-Xylenes NO ug/L Methyl ethyl ketone NO ug/L Methylene chloride NO ug/L Naphthalene NO ug/L o-Xylene NO ug/L Toluene NO ug/L Xylenes, Total NO ug/L Surr: 1,2-0ichlorobenzene-d4 Surr: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-dB Sample 10: C10100941-0030MS 16 Sample Matrix Spike Acetone 19000 ug/L Benzene 2200 ug/L Carbon tetrachloride 2500 ug/L Chloroform 3500 ug/L Chloromethane 2BOO ug/L m+p-Xylenes 4300 ug/L Methyl ethyl ketone 22000 ug/L Methylene chloride 2400 ug/L Naphthalene 2100 ug/L Qualifiers: RL -Analyte reporting limit. S -Spike recovery outside of advisory limits. RL %REC 20 72 1.0 94 1.0 93 1.0 92 1.0 101 1.0 93 20 159 1.0 BB 1.0 B2 1.0 B9 1.0 94 1.0 92 1.0 100 1.0 100 1.0 107 1.0 103 20 1.0 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 1.0 1.0 102 1.0 95 1.0 104 1.0 101 4000 95 200 112 200 126 200 123 200 140 200 109 4000 110 200 121 200 105 Report Date: 11/12/10 Work Order: C10100941 Low Limit High Limit RPO RPOLlmlt Qual Batch: R139399 Run: GCMS2_1 011 02B 11/0211011 :55 70 130 70 130 70 130 70 130 70 130 70 130 70 130 S 70 130 70 130 70 130 70 130 70 130 BO 120 70 130 BO 130 BO 120 Run: GCMS2_1 011 02B 11/02/10 13:05 BO 120 70 130 BO 120 BO 120 Run: GCMS2_1 011 02B 11/02/10 19:31 70 130 70 130 70 130 70 130 70 130 S 70 130 70 130 70 130 70 130 NO -Not detected at the reporting limit. Page 15 of 19 EN:RGY ! '"lIH~I ~."d r·r/l1 ~ www.energytab.com AM/yIIIaI ~ SII!u /152 Helena, lIT 877-472-0711 • Billings, lIT 800-735-4419 • Caspar, WY "8-235-0515 Glllatte, WY .18-888-7175 • Rapid City, SD 888-172-1225 • College Station, 1X 888-890-221 B QA/QC Summary Report Client: Denison Mines USA Corp Report Date: 11/12/10 Project: October Monthly Groundwater 2010 Work Order: C 10100941 Analyte Count Result Units RL %REC Low Limit High limit RPO RPOLlmlt Qual Method: SW8260B Batch: R139399 Sample 10: C10100941·0030MS 16 Sample Matrix Spike Run: GCMS2_1 011 02B 11/02/1019:31 o-Xylene 2100 ug/L 200 105 70 130 Toluene 2200 ug/L 200 109 70 130 Xylenes, Total 6400 ug/L 200 107 70 130 Surr: 1,2-Dichlorobenzene-d4 1.0 103 BO 120 Surr: Dibromofluoromethane 1.0 112 70 130 Surr: p-Bromofluorobenzene 1.0 109 BO 120 Surr: Toluene-dB 1.0 102 BO 120 Sample 10: C10100941-G030MSO 16 Sample Matrix Spike Duplicate Run: GCMS2_1 011 02B 11/02/10 20 :06 Acetone 21000 ug/L 4000 104 70 130 B.B 20 Benzene 2300 ug/L 200 114 70 130 2.1 20 Carbon tetrachloride 2600 ug/L 200 129 70 130 2.2 20 Chloroform 3700 ug/L 200 134 70 130 5.B 20 S Chloromethane 2900 ug/L 200 146 70 130 4.5 20 S m+p-Xylenes 4400 ug/L 200 109 70 130 0.4 20 Methyl ethyl ketone 25000 ug/L 4000 126 70 130 14 20 Methylene chloride 2400 ug/L 200 11B 70 130 2.3 20 Naphthalene 2300 ug/L 200 115 70 130 9.1 20 o-Xylene 2100 ug/L 200 107 70 130 1.9 20 Toluene 2300 ug/L 200 113 70 130 4 20 Xylenes, Total 6500 ug/L 200 10B 70 130 0.9 20 Surr: 1,2-Dlchlorobenzene-d4 1.0 104 BO 120 0 10 Surr: Dibromofluoromethane 1.0 11B 70 130 0 10 Surr: p-Bromofluorobenzene 1.0 107 BO 120 0 10 Surr: Toluene-dB 1.0 107 BO 120 0 10 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. S -Spike recovery outside of advisory limits. Page 16 of 19 EI\ERGY I !\'--lL J! .,\1 ("'rIl l '--, www.energylab.com AMITfIaI~SIIw rm Helena, MT 877-472-0711 • Billings, MT 800-735-4419 • Caspar, WY 181-235-0515 GIIIBtte, WY 818-&88-7175 • Rapid City, SD 88B-172-1225 • College Station, 1X 188-B8D-2218 QA/QC Summary Report Client: Denison Mines USA Corp Project: October Monthly Groundwater 2010 Analyle Count Result Units Method: SW8260B Sample 10: 03-Nov-10_LCS_4 5 Laboratory Control Sample Chloroform 11 ug/L Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Sample 10: 03-Nov-10_MBLK_6 5 Method Blank Chloroform ND ug/L Surr: 1.2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Sample 10: C10100941-0060MS 5 Sample Matrix Spike Chloroform 2400 uglL Surr: 1,2-Dlchlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 RL 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 100 1.0 1.0 1.0 1.0 Report Date: 11/12/10 Work Order: C10100941 %REC Low Limit High Limit RPO RPOLlmlt Qual Batch: R139448 Run: GCMS2_1 011 03A 11/03/10 10:40 105 70 130 101 80 120 99 70 130 104 80 130 100 80 120 Run: GCMS2_101103A 11/03/10 11 :49 101 80 120 94 70 130 104 80 120 100 80 120 Run: GCMS2_1 011 03A 11/03/10 18:35 171 70 130 S 106 80 120 118 70 130 109 80 120 105 80 120 -Spike recovery is high for several analytes. This is a matrix related bias since the MS MSD pair both exhibit this same behavior yet have an acceptable RPD. Sample 10: C10100941-0060MSO 5 Sample Matrix Spike Duplicate Run: GCMS2_101103A 11/03/1019:10 Chloroform 2400 uglL 100 167 70 130 1.6 20 S Surr: 1,2-Dichlorobenzene-d4 1.0 104 80 120 0 10 Surr: Dibromofluoromethane 1.0 117 70 130 0 10 Surr: p-Bromofluorobenzene 1.0 108 80 120 0 10 Surr: Toluene-d8 1.0 108 80 120 0 10 -Spike recovery is high for several analytes. This is a matrix related bias since the MS MSD pair both exhibit this same behavior yet have an acceptable RPD. Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. S -Spike recovery outside of advisory limits. Page 17 of 19 Ef\ERGY /\. \I '.' 'I ' 1,/1, . Helena, MT 877-472-0111 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 Gillette, WY 188-886-7175 • Rapid City, SD 188-672-1225 • Collage StallDn, TX 188-690-2218 Workorder Receipt Checklist Denison Mines USA Corp 111111111111 ~IIIIIIIIIIIIIIII~ IIIIIIIIIII~IIIIIIIIII C10100941 login completed by: Corinne Wagner Reviewed by: Bl2000\kschroeder Reviewed Date: 10/27/2010 Shipping container/cooler in good condition? Custody seals intact on shipping container/cooler? Custody seals intact on sample bottles? Chain of custody present? Chain of custody signed when relinquished and received? Chain of custody agrees with sample labels? Samples in proper container/bottle? Sample containers intact? Sufficient sample volume for indicated test? All samples received within holding time? ContainerfTemp Blank temperature: Water -VOA vials have zero headspace? Water -pH acceptable upon receipt? Contact and Corrective Action Comments: None Yes 0 Yes 0 Yes 0 Yes 0 Yes 0 Yes 0 Yes 0 Yes 0 Yes 0 Yes 0 4°C On Ice Yes 0 Yes 0 Date Received: 10/25/2010 Received by: ha No 0 NoO No 0 No 0 No 0 No 0 No 0 No 0 NoO No 0 No 0 No 0 Carrier name: FedEx Not Present 0 Not Present 0 Not Present 0 No VOA vials submitted 0 Not Applicable 0 Page 18 of 19 -0 Q) <C CD (0 o -...... (0 Chain of Custody and Analytical Request Record Dd\:~on M~II~ Report Mail Address: PO se'" ~0Cl BIAA!:t'\~ lAT ~&1 01\ Invoice Address: ~c:. ~ Etc. &,.tJ~J.~tf'r 2cJ1~ State: Email: 4~ b7~~1 Purchase Order: Page_' _of_'_ Sampler: (Please Print) -r:",."u H, 1J,"Jr..r QuotelBottle Order: Special Report/Formats: ~ ~W@[]@ m®QD~~ .. Contact ELI prior to Dow OPOTWIWWTP D State: ___ _ o Other: 9 10 Cl Ii> "'0 ",.c ~cc;gOI :v ·~>S ~1ii o EDD/EDT(Electronic Data) §~~ ~ ~ Format: ~~&~I~ o LEVEL IV i ~-* g(§ DNELAC ::J~I~~ z a. <fj g»Cl g >1 (f) Collection Collection MATRIX I <i ~ .~ \J1 ~ ':1 q J11 Date Time Return to Client: Lab C W I c..> « ~ W W C/) I RUSH sample submittal ~ R for charges and scheduling -See !::. Instruction "0 I:: Comments: ::J U L~ e t'O I:: .... On Ice: ::J l-S 'E Custody Seal III On Bottle "0 c: On Cooler 1<75 H Intact Signature Match In certain circumstances, samples submitted to Energy Laboratories, Inc. may be subcontracted to other certified laboratories in order to complete the analysis requested. This serves as notice of this possibility. All sub-contract data will be clearly notated on your analytical report. Visit our web site at www.energylab.CQm for additional information. downloadable fee schedule, forms. and links. °c ~N Y N ~: G:.>N TabF2 Laboratory Analytical Reports -Accelerated Monitoring December 2010 A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QAOfficer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines December Monthly 1012345-001A Client Sample ID: MW-ll Collection Date: 12/1512010 1240h Received Date: 12117/2010 1026h Method Used: SW8260C Analytical Results Units: Ilg/L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 Contact: Jo Ann Tischler Analyzed: 12117/2010 1435h VOAs by GC/MS Method 8260C/5030C CAS Reporting Analytical Number Limit Result Qual 109-99-9 1.00 < 1.00 17060-07-0 77-144 106 460-00-4 80-123 106 1868-53-7 80-124 106 2037-26-5 80-125 99.2 Report Date: 12/27/2010 Page 4 of15 All analyses applicable to the CW A, SDWA, and RCRA are perfonned in accordance to NELAC protocols. Pertinent sampling information is located on the attached CDC. This report is provided for the exclusive use of the Hddressee~ Privileges of subsequent use of the name of this company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or sale of any product or process. or in connection with the r~~public~tion .of th~s.report. for a.ny purpose other than for the addressee will be granted only on contact. This company accepts no responsibility except for the due perfonnance of inspection andlor analysis in good faith EN:RGY A.·lI l1 ./d ·~IJI " www.energylab.com AIfII1IIe6I E1IuAtIu smc. 1m Helena, MT 817-472-0711 • Billings, MT 800-735-4489 . Casper, 'NY 888-235-0515 Gil/etta, 'If'( 8&&-186-7175 • Rapid City, SD 888-172-1225 • College Station, 1X 888-691-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: LabID: Denison Mines USA Corp December Groundwater C10120641-005 Client Sample ID: MW 11 Analyses METALS -DISSOLVED Manganese Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result Units 158 ug/L Qualifiers Rl 10 Report Date: 01/14/11 Collection Date: 12/15/1012:40 DateReceived: 12/17/10 Matrix: Aqueous MCL! QCl Method Analysis Date I By E200.8 01/14/11 13:211 sml MCl -Maximum contaminant level. NO -Not detected at the reporting limit. Page 7 of 19 EN:RGY I 1\. 101 J~ .... t '~I ~I '..: www.enefRYlab.com A/IIIJfIaI buIIrIa SItu 1m Helena, MT 811-412-0711 • Bllllnlls, MT 800-135-4489 . Casper, 'NY 888-235-0515 Gilletts, 'NY 88&-88&-1115 • Rapid City, SD 888-612-1225 • Collelle Slation,1X 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: LablD: Denison Mines USA Corp December Groundwater C10120641-001 Client Sample ID: MW 14 Analyses PHYSICAL PROPERTIES pH Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result Units 7.64 s.u. Qualifiers RL 0.01 Report Date: 01/14/11 Collection Date: 12/15/10 11 :05 DateReceived: 12/17/10 Matrix: Aqueous MCll QCl Method Analysis Date 1 By A4500-H 8 12120/10 10:38 IImc MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 3 of 19 EN:RGY 1\ 1., ( )1 I:. J ')1 ~ I • ~ www.energylab.com AaIyf/aII ~ SIIJu 1m Helena, MT 877-412-0711 • Billings, MT 800-135-4489 • Casper, WV 888-235-0515 Gillette, WV 1&6-&86-7175 · Rapid City, SD 818-672-1225 • ColiegeStatlon,1X 888-691-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: December Groundwater Lab 10: C10120641-003 Client Sample 10: MW26 Analyses MAJOR IONS Chloride Nitrogen, Nitrate+Nitrite as N PHYSICAL PROPERTIES pH METALS -DISSOLVED Uranium VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: l,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result 52 0.4 7.65 29.6 ND ND ND 1400 ND ND 1.2 ND ND ND 100 109 102 96.0 D -RL increased due to sample matrix. Units mg/L mg/L S.u. ugtL ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L %REC %REC %REC %REC Report Date: 01/14/11 Collection Date: 12/15/10 11 :30 DateReceived: 12/17/10 Matrix: Aqueous MClt Qualifiers Rl QCl Method Analysis Date t By A4500-CI B 12120/10 15:52/1mc 0.1 E353.2 12121/10 12:571 dc 0.01 A4500-H B 12120/1 0 10:45 IImc 0.30 E200.8 01/04/11 23:381 sml 20 SW8260B 12121/10 06:531 ilr 1.0 SW8260B 12121/10 06:531 ilr 1.0 SW8260B 12121/10 06:531 ilr D 100 SW8260B 12121/1006:171 ilr 1.0 SW8260B 12121/10 06:531 ilr 20 SW8260B 12121/10 06:531 ilr 1.0 SW8260B 12121/1006:531 ilr 1.0 SW8260B 12121/1006:531 ilr 1.0 SW8260B 12121/10 06:531 ilr 1.0 SW8260B 12121/10 06:531 ilr 80-120 SW8260B 12121/10 06:53 1 ilr 70-130 SW8260B 12121/10 06:531 ilr 80-120 SW8260B 12121/10 06:531 ilr 80-120 SW8260B 12121/10 06:531 ilr MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 5 of 19 EN:RGY ! I\L-!()I~/.I''''''I~I··, www.energyfab.com blfytIaI &uk. 51_ list Helena, MT 877-472-0711 • BIllings, NT 800-735-4489 • Casper, WY 888-235-0515 Gilletta, WY 866-68&-7175 • Rapid City, SD 888-672-1225 • College Slation,1X 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp December Groundwater C10120641-004 Client Sample 10: MW30 Analyses MAJOR IONS Nitrogen, Nitrate+Nilrite as N METALS -DISSOLVED Selenium Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. Result 16 30.5 o -Rl increased due to sample matrix. Units mg/l ug/l Report Date: 01/14/11 Collection Date: 12/14/10 12:25 DateReceived: 12/17/10 Matrix: Aqueous MCll Qualifiers Rl QCl Method Analysis Date 1 By 0 E353.2 12121/1013:041 dc 5.0 E200.8 01/04/11 23:451 sml MCl -Maximum contaminant level. NO -Not detected at the reporting limit. Page 6 of 19 EI\ERGY , f\ '1()1 ;)\ 1'.)1 ~I ., www.energyiab.com AMIytk:M EIuIIftIcI stnu ,m Helena, MT 817-47H711 • Billings, MT 800-735-4489 • Casper, 'NY 888-235-0515 Gillette, WY 866-&86-7175 • Rapid City, SD 888-&72-1225 • College Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp December Groundwater C10120641-002 Client Sample 10: MW 31 Analyses Result Units MAJOR IONS Nitrogen, Nitrate+Nitrite as N 20 Report Defin it ions : Rl -Analyte reporting limit. QCl -Quality control limit. o -Rl increased due to sample matrix. mgll Report Date: 01/14/11 Collection Date: 12/14/10 14:30 DateReceived: 12117/10 Matrix: Aqueous MCll Qualifiers Rl QCl Method Analysis Date 1 By o 2 E353.2 12121/1012:541 dc MCl -Maximum contaminant level. NO -Not detected at the reporting limit. Page 4 of 19 EN:RGY f~:-10P/·I·:lf.J1 "'. www.energylab.com AMf1IIaI Ix&IIIIIu .. 'IU Helena, PIT 817-472-0711 • Billings, MT 800·735-4489 . Casper, WY 888·235·0515 Gillette, WY 88&-686·7175 • Rapid CI1y, SD 818·672·1225 • College Station, 1X 888·690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: LablD: Denison Mines USA Corp December Groundwater C10120641-006 Client Sample ID: MW 65 Analyses MAJOR IONS Chloride Nitrogen, Nitrate+Nitrite as N PHYSICAL PROPERTIES pH METALS· DISSOLVED Uranium VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-0ichlorobenzene-d4 Surr: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result 51 0.4 7.69 30.8 NO NO NO 1300 NO NO NO NO NO NO 94.0 104 103 98.0 o -RL increased due to sample matrix. Units mg/L mg/L s.u. ug/L ug/L ug/L ug/L uglL ug/L ug/L ug/L ug/L ug/L ug/L %REC %REC %REC %REC Report Date: 01/14/11 Collection Date: 12/15/10 11 :30 DateReceived: 12/17/10 Matrix: Aqueous MCLI Qualifiers Rl QCl Method Analysis Date 1 By 1 A4500-CI B 12/20/10 15:54 lime 0.1 E353.2 12121/1013:071 de 0.01 A4500-H B 1212011 0 10:52/1mc 0.30 E200.8 01/04/11 23:521 sml 20 SWB260B 12121/10 05:41 1 jlr 1.0 SWB260B 12121/10 05:41 1 jlr 1.0 SWB260B 12121/1005:41 1 jlr 0 100 SW8260B 1212211004:161 jlr 1.0 SWB260B 12121/10 05:41 1 jlr 20 SWB260B 12121/10 05:41 1 jlr 1.0 SWB260B 12121/10 05:41 1 jlr 1.0 SW8260B 12121110 05:41 1 jlr 1.0 SW8260B 12121/1005:411 jlr 1.0 SW8260B 12121/10 05:41 1 jlr BO-120 SW8260B 12121/10 05:41 1 jlr 70-130 SW8260B 12121/10 05:41 1 jlr BO-120 SW8260B 12121/10 05:41 1 jlr 80-120 SW8260B 12121/10 05:41 1 jlr MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 8 of 19 A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANAL YTICAL REPORT Client: Project: Lab Sample ID: Denison Mines December Monthly 1012345-002A Client Sample ID: Trip Blank Collection Date: 12/1512010 Received Date: Method Used: Analytical Results Units: J.lg/L Dilution Factor: 1 Compound Tetrahydrofuran 1211712010 1026h SW8260C Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 Contact: Jo Ann Tischler Analyzed: 12/17/2010 1454h VOAs by GCIMS Method 8260CI5030C CAS Reporting Analytical Number Limit Result Qual 109-99-9 1.00 < 1.00 17060-07-0 77-144 106 460-00-4 80-123 106 1868-53-7 80-124 106 2037-26-5 80-125 99.1 Report Date: 12/27/2010 Page 5 of 15 All analyses applicable to the CW A, SDWA. and RCRA are performed in accordance to NELAC protocols. Pertinent sampling information is located on the attached COCo This report is provided for the exclusive use of the addressee. Privileges of subsequenl use of the name of this company or any member of its staff, or reproduction of this report in connection with Lhe advertisement. promotion or sale of any product or process, or in connection wit~ the r~:public~tion .ofth~s ,report. for a~y puryose other than for the addressee will be granted only on contact. This company accepts no responsibility except for the due perfonnance of inspection and/or analysis in good faith EI\ERGY J\· .... (H '.r.r()I~1 .) m:r www.energytab.com WIyfIaI buIIIICI stnu 1m Helene, MT 877-472-0111 • Billings, MT 80B-135-4489 • Casper, 'NY 888-235-0515 Gillotta, 'NY 8&&-186-1175 • Rapid City, SD 118-&72-1225 • College Station, 1X 888-691-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: LablD: Denison Mines USA Corp December Groundwater C10120641-007 Client Sample ID: Trip Blank Analyses VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes. Total Surr: 1 ,2-0ichlorobenzene-d4 Surr: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-dB Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result NO NO NO NO NO NO NO NO NO NO 103 109 103 95.0 Units ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L %REC %REC %REC %REC Qualifiers Rl 20 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 80-120 70-130 80-120 BO-120 Report Date: 01/14/11 Collection Date: 12115/10 DateReceived: 12/17/10 Matrix: Aqueous MCll QCl Method Analysis Date 1 By SW8260B 12121/10 05:041 ilr SW8260B 12/21/10 05:041 ilr SW8260B 12121/10 05:041 ilr SW8260B 12121/1005:041 ilr SWB260B 12121/10 05:041 ilr SWB260B 12121/10 05:041 ilr SWB260B 12121/10 05:041 ilr SW8260B 12121/1005:041 ilr SWB260B 12121/10 05:041 ilr SW8260B 12121/10 05:041 ilr SW8260B 12121/10 05:041 ilr SW8260B 12121/10 05:041 ilr SW8260B 12121/10 05:041 ilr SWB260B 12121/10 05:041 ilr MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 9 of 19 EN:RGY ! /,H .:>1./ .. 1')(." ~ www.energylab.com AMI1fIaI~stm:. rm Halena, MT 877·412-0711 • Billings, MT 800·735-4489 • Casper, WY 888-235-0515 Gillette, WY 88&-186·7175 • Rapid City, so '88·672·1225 • Callege Station, TX 888-691-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp December Groundwater C10120641-008 Client Sample 10: Temp Blank Analyses Result Units PHYSICAL PROPERTIES Temperature Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. 2.0 Qualifiers RL Report Date: 01/14/11 Collection Date: 12/15/10 DateReceived: 12117/10 Matrix: Aqueous MCU QCL Method Analysis Date I By E170.1 12117/10 09:15/ kbh MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 10 of 19 A Jo Ann Tischler Denison Mines 1050 17th Street, # 950 AMERICAN Denver, CO 80265 WEST TEL: (303) 389-4132 ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-labs.com Kyle F. Gross Laboratory Director RE: December Monthly Dear 10 Ann Tischler: Lab Set ill: 1012345 American West Analytical Laboratories received 2 sample( s) on 12/17/2010 for the analyses presented in the following report. All analyses were performed in accordance to The NELAC Institute protocols unless noted otherwise. American West Analytical Laboratories is certified by The NELAC Institute in Utah and Texas; and is state certified in Colorado and Idaho. Certification document is available upon request. If you have any questions or concerns regarding this report please feel free to call. The abbreviation "Surr" found in organic reports indicates a surrogate compound that is intentionally added by the laboratory to determine sample injection, extraction, andlor purging efficiency. The "Reporting Limit" found on the report is equivalent to the practical quantitaion limit (PQL). This is the minimum concentration that can be reported by the method referenced and the sample matrix. The reporting limit must not be confused with any regulatory limit. Analytical results are reported to three significant figures for quality control and calculation purposes. Jose Rocha Thank You, QA Officer Ky I e F. Digitally signed by Kyle F. Gross ON: cn=Kyle F. Gross. o=AWAL. ou=AWAL. email=kyle@awal- G labs com, c;::US ro S S Date: 2010.122713:05:07-07'00· Approved by: '-__________ ---J Laboratory Director or designee Report Date: 12/27/2010 Page 1 of15 All analyses applicable to the CW A. SDWA. and RCRA are perfonned in accordance to NELAC prolocols. Pertinent sampling infonnation is located on the attached CDC. This report is provided for lhe exclusive use of the addressee. Privileges of subsequent usc of the name of this company or any member of its starr, or reproducLion of this report in conneclion with the advertisement, promotion or sale of any producl or process, or in connection wit.h the r~:public~tion .ofth~s report. for a.ny puryose other than for the addressee will be granted only on contact. This company accepts no responsibiliLy except for the due performance ofinspcction and/or analysis in good faitb A AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Client: Project: Lab Set ID: Date Received: Lab Sample ID 1012345-001A 10 12345-002A SAMPLE SUMMARY Denison Mines December Monthly 1012345 1211712010 1026h Client Sample ID MW-ll Trip Blank Contact: Jo Ann Tischler Date Collected Matrix Analysis 12/15/2010 1240h Aqueous VOA by GC/MS Method 8260CI5030C 12/15/2010 Aqueous VOA by GC/MS Method 8260CI5030C Report Date: 12/27/2010 Page 2 of 15 All analyses applicable to the CW A, SDWA, and RCM are performed in accordance to NELAC protocols. Pertinent sampling information is located on tbc attached COCo This report is provided for the exclusive use of the addressee. Privileges of subsequent use of lhe name of this company or any member of its slaff, or reproduction of this report in connection with the advertisementJ promotion or sale of any product or process. or in connection wit.h the r~:public~tion ,of th~s ,report, for ~y pUr:P0se other than for the addressee will be granted only on contact. This company accepts no responsibility except for the due performance of inspection and/or analysis in good faith A AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 email: awal@awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Volatile Case Narrative Client: Denison Mines Contact: Jo Ann Tischler December Monthly 1012345 Project: Lab Set ID: Sample Receipt Information: Date of Receipt: Date(s) of Collection: Sample Condition: C-O-C Discrepancies: Method: Analysis: 12117/2010 12/15/2010 Intact None SW -846 8260CI5030C Tetrahydrofuran General Set Comments: Tetrahydrofuran was not observed above reporting limits. Holding Time and Preservation Requirements: All samples were received in appropriate containers and properly preserved. The analysis and preparation of all samples were performed within the method holding times following the methods stated on the analytical reports. Analytical QC Requirements: All instrument calibration and calibration check requirements were met. All internal standard recoveries met method criterion. Batch QC Requirements: MB, LCS, MS, MSD, RPD, and Surrogates: Method Blanks (MBs): No target analytes were detected above reporting limits, indicating that the procedure was free from contamination. Laboratory Control Sample (LCSs): All LCS recoveries were within control limits, indicating that the preparation and analysis were in control. Matrix Spike 1 Matrix Spike Duplicate (MS/MSD): All percent recoveries and RPDs (Relative Percent Differences) were inside established limits, indicating no apparent matrix interferences. Surrogates: All surrogate recoveries were within established limits. Corrective Action: None required. Report Date: 12/27/2010 Page 3 ofl5 All analyses applicable to the CWA, SDWA, and RCRA are performed in accordance to NELAC protocols. Pertinent sampling information is located on the atlached CDC. This report is provided for the exclusive use of the addressee. Privileges of subsequent use of the name of this company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or sale of any producL or process, or in connection wi~ the re-pubric~lion .ofth~s .report. for a~y pu,?ose other than for the addressee wi.ll be granted only on contacl This company accepts no responsibility except for the due pcrfonnance of inspection andlor anaJysis in good faith A Client: Denison Mines Lab Set ID: 1012345 Project: December Monthly Sample ID Analyte LCS VOC 121710A Tetrahydrofuran LCS VOC 121710A Surr: 1,2-Dichloroethane-d4 LCS VOC 121710A Surr: 4-Bromofluorobenzene LCS VOC 121710A Surr: Dibromofluoromethane LCS VOC 121710A Surr: Toluene-d8 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 263-8686, Fax (801) 263-8687 e-mail: awa1@awal-labs.com, web: www.awal-Iabs.com C SUMMARY REPORT Contact: Dept: Jo Ann Tischler MSVOA QCType: LCS Amount Original Units Method Result Spiked Amount %REC Limits Ilg/L SW8260C 14.3 20.00 0 71.4 43-146 %REC SW8260C 50.2 50.00 100 69-132 %REC SW8260C 51.5 50.00 103 85-118 %REC SW8260C 53.2 50.00 106 80-120 %REC SW8260C 49.7 50.00 99.3 81-120 Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limit Qual Date Analyzed 1211712010 1319h 12117/2010 1319h 12117/2010 1319h 12/17/2010 1319h 12117/2010 1319h Report Date: 1212712010 Page 6 of15 All analyses applicable to the CWA, SOW A, and ReRA are pcrfonncd in accordance to NELAC protocols. Pertinent sampling infonnation is located on the attached COC This report is provided for the exclusive usc of the addressee. Privileges of subsequCJ1t usc of the name of this company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or sale afmy product or process, or in connection with the rc-publication of this report for any purpose other than for the addressee will be granted only on contact. This company accepts no responsibility except for the due performance of inspection and/or analysis in good A Client: Denison Mines Lab Set ID: 1012345 Project: December Monthly Sample ID Analyte MB VOC 121710A Tetrahydrofuran MB VOC 121710A Surr: 1,2-Dichloroethane-d4 MB VOC 121710A Surr: 4-Bromofluorobenzene MB VOC 121710A Surr: Dibromofluoromethane MB VOC 121710A Surr: Toluene-d8 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Units J-lglL %REC %REC %REC %REC Salt Lake City, UT 84115 (801) 263-8686, Toll Free (888) 263-8686, Fax (801) 263-8687 e-mail: awal@awal-labs.com. web: www.awal-labs.com QC SUMMARY REPORT Contact: Dept: QC Type: Amount Original Jo Ann Tischler MSVOA MBLK Method Result Spiked Amount %REC Limits SW8260C < 1.00 SW8260C 51.6 50.00 103 69-132 SW8260C 54.4 50.00 109 85-118 SW8260C 52.6 50.00 105 80-120 SW8260C 50.8 50.00 102 81-120 Kyle F. Gross Laboratory Director Jose Rocha QAOfficer RPD %RPD Limit Qual Date Analyzed 12/17/2010 1356h 12117/2010 1356h 12/17/2010 1356h 1211712010 1356h 12/17/2010 1356h Report Date: 12/27/2010 Page 7 ofl5 All analyses applicable to the CWA, SDWA, and ReRA are performed in accordance to NELAe protocols. Pertinent sampling infonnation is localed on the attached COCo This report is provided for the exclusive usc of the addressee, Priv;)egcs of subsequcot usc of the name of this company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in conncction with thc rc-publication of this report for any purpose other than for thc addressee will bc grantcd only on contact. This company accepts no responsibility except for thc due performance of inspection andlor analysis in good A Client: Denison Mines Lab Set ID: 1012345 Project: December Monthly Sample ID Analyte 1012345-001~S Tetrahydrofuran 1012345-001~S Surr: 1,2-Dichloroethane-d4 1012345-001~S Surr: 4-Bromofluorobenzene 1012345-001~S Surr: Dibromofluoromethane 1012345-001~S Surr: To1uene-d8 AMERICAN WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686. Toll Free (888) 263-8686. Fax (801) 263-8687 e-mail: awaJ@awal-labs.com, web: www.awal-labs.com C SUMMARY REPORT Contact: Dept: Jo Ann Tischler MSVOA QC Type: MS Amount Original Units Method Result Spiked Amount %REC Limits Ilg/L SW8260C 11.9 20.00 0 59.6 43-146 %REC SW8260C 51.1 50.00 102 77-144 %REC SW8260C 49.8 50.00 99.5 80-123 %REC SW8260C 53.3 50.00 107 80-124 %REC SW8260C 48.0 50.00 95.9 80-l25 Kyle F_ Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limit Qual Date Analyzed 12117/2010 1551h 12/17/2010 1551h 12/17/2010 1551h 12/17/2010 1551h 12117/2010 1551h Report Date: 12/27/2010 Page 8 oflS All analyses applicable to the CWA, SOW A, and ReRA are performed in accordance to NELAe protocols Pertinent sampling infonnation is located on the attached COCo This report is provided for the exclusive usc of the addressee Privileges of subsequent USc of the name of this company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection with the rc-publication of this rcpon for any purpose other than for the addressee will be granted only on contact This eompany accepts no responsibility exeept fOT the due performance of inspection and/or analysis in good A Client: Denison Mines Lab Set ID: 1012345 Project: December Monthly Sample ID Analyte 1012345-001AMSD Tetrahydrofuran 1012345-001AMSD Sun: 1,2-Dichloroethane-d4 1012345-001AMSD Sun: 4-Bromofluorobenzene 1012345-001AMSD Sun: Dibromofluoromethane 1012345-001AMSD Sun: Toluene-d8 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686. Toll Free (888) 263-8686. Fax (801) 263-8687 e-mail: awal@awal-labs.com. web: www.awal-labs.com C SUMMARY REPORT Contact: Dept: Jo Ann Tischler MSVOA QC Type: MSD Amount Original Units Method Result Spiked Amount %REC Limits Ilg/L SW8260C 13.9 20.00 0 69.4 43-146 %REC SW8260C 53.3 50.00 107 77-144 %REC SW8260C 50.1 50.00 100 80-123 %REC SW8260C 53.7 50.00 107 80-124 %REC SW8260C 48.4 50.00 96.7 80-125 Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limit Qual 15.3 25 Date Analyzed 12/17/20101610h 12/17/2010 1610h 12/17/2010 1610h 12/17/2010 1610h 12/17/20101610h Report Date: 12/2712010 Page 9 oflS All analyses applicable to the CWA, SDWA, and RCRA arc: pcrfonncd in accordance to NELAe protocols. Pertinent sampling information is located on the attached COCo This report is provided fOT the exclusive Usc of the addressee. Privileges of subsequent usc of the name of this company or any member of its staff, or reproduction of this report in connection with the advertisement. promotion or sale of any product or process, or in conncction with the rc-publication of this report for any purpose othcrthan for the addressee will be granted only on contact This company accepts no responsibility ex.cept fOT the due pcrfonnanee of inspection andlor anal%is in good Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\DATA\DEC10-C\17DEC10A\ M06L3451.D 17 Dee 2010 2:35 pm 1012345-001A SAMP 5.0ML 10F3 7 Sample Multiplier: 1 Quant Time: Dee 17 15:10:24 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_24.M Quant Title VOA Calibration QLast Update Mon Nov 29 10:10:12 2010 Response via Initial Calibration (QT Reviewed) !Abundance --TIC: M06l3451.0\data.ms 1300000 1250000 ..; -0 ~ ., ~ N c: ~ l!l .Q ~ .c U ~ 0 1200000 1150000 f ~ .l2 .c .Il (/) 0 gf ~ f ~ ~ ., S!l -" 1100000 1050000 2 g 1000000 '5 E 2 <Xl 950000 t: ::> en 900000 ~ ., ~ 850000 ~ g IT: 0 800000 ~ 750000 700000 650000 600000 550000 en oj c: en .. oj .c 1;; c: E 2 2 1;; g 2 0 '5 :2 E " 2 0 -" "'-0 500000 450000 400000 t: I:: ::> ::> en en 350000 300000 250000 200000 150000 ~ ::> .!Il -0 c: ~ 100000 U 50000 _.A t I I I I o me"2 ~.OO 2.502 00 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50~00 ~50 lLOQ_~ AFULLW_24.M Fri Dee 17 15:11:13 2010 Report Date: 12/27 12ijID..l't¥ag~1O ofl5 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\DATA\DEC10-C\17DEC10A\ M07L3452.D 17 Dee 2010 2:54 pm 1012345-002A SAMP 5.0ML 10F3 8 Sample Multiplier: 1 Quant Time: Dee 17 15:10:57 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_24.M Quant Title VOA Calibration QLast Update Mon Nov 29 10:10:12 2010 Response via Initial Calibration (QT Reviewed) r-undance-TIC: M07L3452.D\data.ms 115000 0 ~ on i!! CD -u I'! ~ ~ " 0 N .Q ] .c .11 e 0 1100000 105000 0 "'-:c () 0 0 t-~ I-!!2 1000000 950000 . CQ. i!! 90.0000 IS ,; r;: r;: .8 Q) e I'! ~ Q) .0 ~ e 0 g e u:: CD 850000 80000 ~ 15 750000 700000 650000 600000 550000 500000 <fJ gf "l. .J!! Q) r;: Q; os E ~ e e 0 .Q " .c 'E .Il 450000 400000 E 0 e "'-.0 i5 ~ ~ <fJ 350000 <fJ 300000 250000 200000 150000 100000 saooo -~ iA I T o "1 I I I 1J!1~ 2·QQ~L :t!l_0_ 3.5g 4.00 4.50 5.00 5.50 ~.QL 6.50 7.00 7.50 8.00 8.50 9.00 9.50 10.00 10.50 11.00 11.50 AFULLW_24.M Fri Dee 17 15:11:46 2010 Report Date: 12/27/20'ID1El'tt.ge111 ofl5 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via 2700000 2600000 2500000 2400000 2300000 2200000 2100000 2000000 1900000 1800000 1700000 1600000 1500000 1400000 1200000 1100000 1000000 900000 800000 700000 600000 400000 300000 200000 Quantitati on Report C:\msdehem\1\DATA\DEC10-C\17DEC10A\ M02LCS50.D 17 Dee 2010 1:19 pm LCS VOC 121710A LCS SEE COVERSHEET FOR 10 AND AMOUNTS 3 Sample Multiplier: 1 Dee 17 13:30:57 2010 C:\MSDCHEM\1\METHODS\AFULLW_24.M VOA Calibration Mon Nov 29 10:10:12 2010 Initial Calibration (Not Re viewe d) TIC: M02LCS50.D\data.ms AFULLW_24.M Fri Dee 17 14:36:36 2010 l Report Date: 12/27/2ijImEp't1ge'i12of15 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\DATA\DEC10-C\17DEC10A\ M04LMBLK.D 17 Dee 2010 1:56 pm MB VOC 121710A MBLK 5.0ML 5 Sample Multiplier: 1 Quant Time: Dee 17 14:27:33 2010 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_24.M Quant Title VOA Calibration QLast Update Mon Nov 29 10:10:12 2010 Response via Initial Calibration (QT Reviewed) ~undance TIC: M04LMBLK.D\dala.ms 1300000 1250000 on ~ ~ " .u ., c 1200000 ~ ., N .2l c ., e .0 .Q e 1150000 .r:; ~ U .11 0 * 1100000 ~ ~ !!.l 1050000 I "l. ., c ., 1000000 ~ Q) ai .0 C e Q) 0 950000 ~ " 'li .2l E e e 900000 g '" u:: 0 " en 850000 ~ 800000 750000 700000 650000 600000 550000 en ai 500000 c ~ .. ~ E .. 450000 e ~ 0 e :> 0 'li :c E " 400000 e i5 ,g N. 0 ~ t: " 350000 en en 300000 250000 200000 " 150000 ~ iil '6 100000 c ~ u 50000 0 J.. , 6.50 710 810 8.~0 [rime··> ~O!L?,§Q 3.01L].5Q 4.QQ~0 5.00 §:.50 6.00 7.00 9.bo 9.50 10.00 10.50 11 ~OO 11 ~5O AFULLW_24.M Fri Dee 17 14:37:08 2010 Report Date: 12/27/2ijIDJEP'tlgti13of15 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via ~undance 2300000 2200000 2100000 2000000 1900000 1800000 1700000 1600000 1500000 1400000 1300000 1200000 11 1000000 900000 800000 700000 600000 500000 300000 200000 Quantitation Report C:\msdehem\1\DATA\DEC10-C\17DEC10A\ M10S3451.D 17 Dee 2010 3:51 pm 1012345-001AMS MS 5.0ML 20F3 11 Sample Multiplier: 1 Dee 17 16:03:16 2010 C:\MSDCHEM\1\METHODS\AFULLW_24.M VOA Calibration Mon Nov 29 10:10:12 2010 Initial Calibration (Not Reviewed) TIC: M10S3451.D\data.ms '" '" ~ t Ql I c: !! "0 f-~ '" .; I c: E i!l c: .lS e 0 " iI 0 f-~ AFULLW_24.M Fri Dee 17 16:23:49 2010 Report Date: I 2/27/2¥jft9 EP6g#I 4 of IS Quantitation Report Data Path Data File Acq On Operator Sample Mise C:\msdchem\1\DATA\DEC10-C\17DEC10A\ MllD3451. D ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via 17 Dec 2010 4:10 pm 1012345-001AMSD MSD 5.0ML 30F3 12 Sample Multiplier: 1 Dec 17 16:22:19 2010 C:\MSDCHEM\1\METHODS\AFULLW_24.M VOA Calibration Mon Nov 29 10:10:12 2010 Initial Calibration (Not Reviewed) TIC: M11 D3451.D\data.ms 2200000 2100000 2000000 1900000 1800000 1700000 1600000 1500000 1300000 1200000 mme-> AFULLW_24.M Fri Dec 17 16:24:23 2010 " en is I Report Date: 12/27/2ti'm:1E¥t1g#15 of15 American West Analytical Laboratories WORK ORDER Summary Client: Denison Mines ClientID: DEN I 00 Contact: Project: December Monthly QC Level: Comments: No Hard Copies (UL). QC 3 & Summary. EDD-CSV. Report THF to 1 Ilg/L.; SamplelD Client Sample ID Collected Date Received Date Jo Ann Tischler LEVEL III Date Due 1012345-001A MW-ll 1211512010 12;40:00 PM 1211712010 10:26:00 AM 11412011 1 01 2345-002A Trip Blallk 12/1512010 114/2011 Matrix Aqueous Work Order: 1012345 Page 1 of1 12117/2010 WOType: Project I , Test Code Sel Storage 8260-W o VOCFridge 8260-W o VOCFridge 3 American West Analytical Laboratories WORK ORDER Summary Client: CJientID: Project: Comments: SampleID 1012345-001A 1012345-002A Denison Mines DEN 1 00 Contact: December Monthly QC Level: No Hard Copies (UL). QC 3 & Summary. EDD-CSV. Report THF to 1 /lg!L.; Client Sample lD Collected Date Received Date Jo Ann Tischler LEYEL III Date Due MW-ll 12115/201012:40;00 PM 12/171201010:26:00 AM 1/412011 Trip Blank 12/1512010 1/412011 Matrix Aqueous Work Order: 1012345 Page 1 of1 12117/2010 WOType: Project 4 Test Code Sel Storage 8260-W ~ VOCFridge 8260-W ~ VOCFridge 3 OENISOJ)~ MINES CHAIN OF CUSTODY Sheet 1 of 1 Samples Shipped to: American West Analytical Lab 463 West 3600 South Contact: Ryan Palmer or David Turk Ph: 435 678 2221 Pro'ect December Monthl SampleJO MW 11 Trip Blank Salt Lake City, Ut 84115 rpalmer@denisonmines.com dturk@denisonmines.com Chain of Custody/Sampling Analysis Request Samplers Name Tanner Hollida Date Time Collected Collected Laboratory Analysis Re~uested 12/15/2010 1240 THF 12/15/2010 Please notify Ryan Palmer of Reciept tempature on these samples Immediately! Thank you. 8elinquished By:(Signature) OatefTime Recei . a By:(Signature) 12/16/2010 1300 DatelTime DatefTime 70~ Lab Set ID: / (j r 2. ? £(5" Samples Were: COC Tape Was: Container Type: No. Rec. ;&shipped By: tlf#S Present on Outer Package I ~ W AL S[JppUed Plastic o Hand Delivered 'fA. Yes DNa ON/A o A WA-L.. Supplied Clear Glass o Ambient . Unbroken on Outer package o A WAL Sbm>lied Amber Glass j;fCh ill ed mYes ONo ON/A, o A WAL SUPP~AlTOC/TOX Vials Temperature 2.~ DC t Present on Sample o Amber 0 Clear 0 eadspace 0 No Headspace Rec. BrokeolLeaking DYes ErNo ON/A . 0 Yes DNo MN/A o NOll A W AL Supplied ~tainer Notes: I Unbroken on Sample Notes: ~. DYes ONo ftfN/A Properly Presel'ved ~Yes DNa DN/A Notes: ( Notes: Rec. Within Hold r$..Yes DNa Discrepancies Between Labels and COC Notes: I No~es: '. Bottle.. Type Preservative Ail pHs OK Ammonia Vil . U_~() .' COD pH<2H2S0~ -:-'--. Cyanide PH >12 NaOH ~ t-. ; Metals pH <2 HNO; . ' , r--- N02 & N03 pH <2 H?S04 ---Nutrients pH <2 H2S04 ---'-" O&G, pH <2HCL --. , 1-' . Phenols pH <2 H2S04 --I-..... ' . Sulfide pH> 9NaOH, ZnAC --........... '. TKN pH <2 H2SO4 ............. TOC . pH <2 H3P04 . , -...... TP04 TPH Procedure: - 1) 2) 3) 4) 5) . 6) 7) pH <2 H2SO4 . pH<2HCL Pour a small amount of sample in the sample lid Pour sample (rom Lid gently over wide range pH paper Do Not dip the pH paper in tne sample bottle or lid . . . If sample is not preseNed.properJy list its extension and receiving pH in the appropriate column above Flag COC and notify client for further instructions Place client conversation on coe . Samples may be adjusted at client request '-...... ...... '" '-...., DYes ~ '" ~ . AJNa \ I , I EI\ERGY I / !-ir .... r lA\' jr~1 f_, www.energylab.com AMIytIaI£xuIIIa -. 1m Helena, MT 811-412-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 886-886-7175 • Rapid City, SD 888-672-1225 • College Statlon,lX 888-691-2218 ANALYTICAL SUMMARY REPORT January 14, 2011 Denison Mines USA Corp 6425 S Hwy 191 Blanding, UT 84511 Workorder No.: C10120641 Project Name: December Groundwater Quote 10: C1640 -POC Wells Energy Laboratories, Inc. Casper WY received the following 8 samples for Denison Mines USA Corp on 12/17/2010 for analysis. Sample 10 Client Sample 10 Collect Date Receive Date Matrix Test C10120641-001 MW 14 12/15/1011 :05 12/17/10 Aqueous pH C10120641-002 MW 31 12114/1014:30 12/17/10 Aqueous Nitrogen, Nitrate + Nitrite C10120641-003 MW26 12/15/10 11 :30 12/17/10 Aqueous Metals by ICP/ICPMS, Dissolved Chloride Nitrogen, Nitrate + Nitrite pH SW8260B VOCs, Standard List C10120641-004 MW30 12114/10 12:25 12/17/10 Aqueous Metals by ICP/ICPMS, Dissolved Nitrogen, Nitrate + Nitrite C10120641-005 MW 11 12/15/10 12:40 12/17/10 Aqueous Metals by ICP/ICPMS, Dissolved C10120641-006 MW65 12115/10 11 :30 12/17/10 Aqueous Metals by ICP/ICPMS, Dissolved Chloride Nitrogen, Nitrate + Nitrite pH SW8260B VOCs, Standard List C10120641-007 Trip Blank 12/15/10 00:00 12117/10 Aqueous SW8260B VOCs, Standard List C10120641-008 Temp Blank 12115/10 00:00 12/17/10 Aqueous Temperature This report was prepared by Energy Laboratories, Inc., 2393 Salt Creek Hwy., Casper, WY 82601. Any exceptions or problems with the analyses are noted in the Laboratory Analytical Report, the QAlQC Summary Report, or the Case Narrative. The results as reported relate only to the item(s) submitted for testing. If you have any questions regarding these test results, please call. Report Approved By: c3t.?~ D uJtJ.~ Reporting Supervisor Digitally signed by Stephanie Waldrop Date: 2011.01 .14 15:30:14 -07:00 Page 1 of 19 www.energytab.com Helena, MT 877-472-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 MI/yfIaI E1tuIIIHIa .. 1m GUietta. WY 866-686-7175 • Ra Id C SD 888-672-1225 • Colle e Station TX 888-690-2218 CLIENT: Denison Mines USA Corp Project: December Groundwater Report Date: 01/14/11 Sample Delivery Group: C 10120641 CASE NARRATIVE ORIGINAL SAMPLE SUBMITIAL{S) All original sample submittals have been returned with the data package. SAMPLE TEMPERATURE COMPLIANCE: 4"C (±2"C) Temperature of samples received may not be considered properly preserved by accepted standards. Samples that are hand delivered immediately after collection shall be considered acceptable if there is evidence that the chilling process has begun. GROSS ALPHA ANALYSIS Method 900.0 for gross alpha and gross beta is intended as a drinking water method for low TDS waters. Data provided by this method for non potable waters should be viewed as inconsistent. RADON IN AIR ANALYSIS The desired exposure time is 48 hours (2 days). The time delay in returning the canister to the laboratory for processing should be as short as possible to avoid excessive decay. Maximum recommended delay between end of exposure to beginning of counting should not exceed 8 days. SOIUSOLID SAMPLES All samples reported on an as received basis unless otherwise indicated. ATRAZINE, SIMAZINE AND PCB ANALYSIS Data for PCBs, Atrazine and Simazine are reported from EPA 525.2. PCB data reported by ELI reflects the results for seven individual Aroclors. When the results for all seven are NO (not detected), the sample meets EPA compliance criteria for PCB monitoring. SUBCONTRACTING ANALYSIS Subcontracting of sample analyses to an outside laboratory may be required. If so, ENERGY LABORATORIES will utilize its branch laboratories or qualified contract laboratories for this service. Any such laboratories will be indicated within the Laboratory Analytical Report. BRANCH LABORATORY LOCATIONS eli-b -Energy Laboratories, Inc. -Billings, MT eli-g -Energy Laboratories, Inc. -Gillette, WY eli-h -Energy Laboratories, Inc. -Helena, MT eli-r -Energy Laboratories, Inc. -Rapid City, SO eli-t -Energy Laboratories, Inc. -College Station, TX CERTIFICATIONS: USEPA: WY00002, Radiochemical WY00937; FL-DOH NELAC: E87641, Radiochemical E871 017; California: 02118CA; Oregon: WY200001; Utah: 3072350515; Virginia: 00057; Washington: C1903 ISO 17025 DISCLAIMER: The results of this Analytical Report relate only to the items submitted for analysis. ENERGY LABORATORIES, INC. -CASPER,WY certifies that certain method selections contained in this report meet requirements as set forth by the above accrediting authorities. Some results requested by the client may not be covered under these certifications. All analysis data to be submitted for regulatory enforcement should be certified in the sample state of origin. Please verify ELI's certification coverage by visiting www.energylab.com ELI appreciates the opportunity to provide you with this analytical service. For additional information and services visit our web page www.energylab.com. Page 2 of 19 EN:RGY Tt,I-i(>I~/~I L J.lJ ~~ www.el1ergytab.com ~~ .. 'm Helena, MT 877-472-0111 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gil/etta, WY 886-&8&-7175 • Rapid City, SD 888-&72-1225 • College Station, TX 888-&80-2218 Client: Denison Mines USA Corp Project: December Groundwater QA/QC Summary Report Prepared by Casper, WY Branch Report Date: 01/14/11 Work Order: C10120641 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: A4500-CI B Sample 10: MBLK9-12/20/2010 Chloride Sample 10: LCS35-12/20/2010 Chloride Sample 10: C10120641-D06AMS Chloride Sample 10: C10120641-D06AMSO Chloride Qualifiers: RL • Analyte reporting limit. Method Blank ND mg/L Laboratory Control Sample 3510 mg/L Sample Matrix Spike 86.1 mg/L Sample Matrix Spike Duplicate 87.4 mglL Batch: 12120/2010-CL-TTR-W Run: TITRATION_1 01220A 12120/10 13:16 0.5 Run: TITRATION_101220A 12/2011 0 14:59 1.0 99 90 110 Run: TITRATION_101220A 12120/10 16:07 1.0 99 90 110 Run: TITRATION_101220A 12120/10 16:13 1.0 103 90 110 1.6 10 NO -Not detected at the reporting limit. Page 11 of 19 www.energylab.com EN:RGY 1\1-3()Il}\J :~I·" '_ AIuIytIaI &ullMelSiIa 1m Helene, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 88&-888-7175 • Rapid City, so 888-872-1225 • College Station, TX 888-880-2218 Client: Denison Mines USA Corp Project: December Groundwater QA/QC Summary Report Prepared by Casper, WY Branch Report Date: 01/14/11 Work Order: C10120641 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: A4500-H B Sample 10: ICVC101220_1 pH Method: A4S00-H B Sample 10: C10120619-002AOUP pH Qualifiers: RL -Analyte reporting limit. Initial Calibration Verification Standard 6.90 S.u. 0.010 101 Sample Duplicate 7.68 s.U. 0.010 98 Analytical Run: ORION555A-2_1 01220A 12120/10 10:03 102 Batch: 101220_1_PH-W_555A-2 Run: ORION555A-2_101220A 12120/1010:26 0.1 3 ND -Not detected at the reporting limit. Page 12 of 19 EN:RGY www.energyfab.com Helena, MT 871-472-0711 • Blllinl/s, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 886-888-7175 • Rapid City, SD 888-872-1225 • College Station, 1X 888-690-2218 : 1\~lon/\l :_ H I ~ AMIybI Exu/IIIIII:II SIJra '151 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 01/14/11 Project: December Groundwater Work Order: C10120641 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: E200.8 Batch: R141484 Sample 10: LRB 2 Method Blank Run: ICPMS2-C_11 01 04A 01/04/11 13:25 Selenium 0.0002 mg/L 0.0002 Uranium ND mg/L 1E-05 Sample 10: LFB 2 Laboratory Fortified Blank Run: ICPMS2-C_110104A 01/04/11 13:32 Selenium 0.0524 mg/L 0.0010 104 85 115 Uranium 0.0518 mg/L 0.00030 104 85 115 Sample 10: C10120641-o06BMS4 2 Sample Matrix Spike Run: ICPMS2-C_110104A 01/04/11 23:58 Selenium 0.0505 mg/L 0.0010 100 70 130 Uranium 0.0897 mg/L 0.00030 118 70 130 Sample 10: C10120641-006BMSO 2 Sample Matrix Spike Duplicate Run: ICPMS2-C_110104A 01/05/11 00:32 Selenium 0.0515 mg/L 0.0010 102 70 130 2.0 20 Uranium 0.0895 mg/L 0.00030 117 70 130 0.2 20 Method: E200.8 Batch: R141855 Sample 10: LRB Method Blank Run: ICPMS4-C_110114A 01/14/11 13:01 Manganese 5E-05 mg/L 2E-05 Sample 10: LFB Laboratory Fortified Blank Run: ICPMS4-C_11 0114A 01/14/11 13:07 Manganese 0.0541 mg/L 0.0010 108 85 115 Sample 10: C10120909-002CMS4 Sample Matrix Spike Run: ICPMS4-C _11 0114A 01/14/11 13:42 Manganese 0.0522 mg/L 0.010 104 70 130 Sample 10: C10120909-o02CMSO Sample Matrix Spike Duplicate Run: ICPMS4-C_110114A 01/14/11 13:49 Manganese 0.0459 mg/L 0.010 92 70 130 13 20 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. Page 13 of 19 EN:RGY I I\dljl ~~d .... )' ... 1 ~~ www.energylab.com AIuIybI~SiIu 7111 Helena, MT 871-472-0711 • Billings, MT 800-735-4489 • Caspar, WY 88'-235-0515 Gillette, 'NY 86&-186-7175 • Rapid City, so '88-672-1225 • College Station, lX 888-690-2218 Client: Denison Mines USA Corp Project: December Groundwater QA/QC Summary Report Prepared by Casper, WY Branch Report Date: 01/14/11 Work Order: C10120641 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: E353.2 Sample 10: MBLK-1 Nitrogen, Nitrate+Nitrite as N Sample 10: LCS-2 Nitrogen, Nitrate+Nitrite as N Sample 10: C10120654-001AMS Nitrogen, Nitrate+Nitrite as N Sample 10: C10120654-001AMSO Nitrogen, Nitrate+Nitrite as N Qualifiers: RL -Analyte reporting limit. Method Blank ND mglL Laboratory Control Sample 2.50 mglL Sample Matrix Spike 4.07 mglL Sample Matrix Spike Duplicate 4.10 mglL Batch: R141128 Run: TECHNICON_l01221A 12121/10 12:22 0.04 Run: TECHNICON_l01221A 12121/10 12:24 0.10 100 90 110 Run: TECHNICON_l01221A 12121/1013:17 0.10 97 90 110 Run: TECHNICON_l01221A 12121/1013:19 0.10 99 90 110 0.7 10 ND -Not detected at the reporting limit. Page 14 of 19 EI\ERGY I"'-H)I ~/.I :)~"I ._ www.energylab.com AMIyIIcM~SIIJw ,m Helena, MT 877-472-0711 • Billings, MT 800-135-4489 • Casper, WY 888-235-0515 Gillette, WY 86&-68&-7175 • Rapid City, SD 888-&72-1225 • College StatiDn, TX 888-690-2218 QAlQC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 01/14/11 Project: December Groundwater Work Order: C 1 0120641 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: SW8260B Batch: R141110 Sample 10: 122010_LCS_ 4 16 Laboratory Control Sample Run: SATURNCA_101220A 12120/10 11 :48 Acetone 130 ug/L 20 127 70 130 Benzene 8.6 ug/L 1.0 86 70 130 Carbon tetrachloride 9.0 ug/L 1.0 90 70 130 Chloroform 9.1 ug/L 1.0 91 70 130 Chloromethane 8.5 ug/L 1.0 85 70 130 m+p-Xylenes 19 ugIL 1.0 93 70 130 Methyl ethyl ketone 110 ug/L 20 108 70 130 Methylene chloride 10 ug/L 1.0 100 70 130 Naphthalene 7.7 ug/L 1.0 77 70 130 o-Xylene 9.6 ugIL 1.0 96 70 130 Toluene 9.0 ugIL 1.0 90 70 130 Xylenes, Total 28 ug/L 1.0 94 70 130 Surr: 1,2-0ichlorobenzene-d4 1.0 98 80 120 Surr: Oibromofluoromethane 1.0 95 70 130 Surr: p-Bromofluorobenzene 1.0 98 80 130 Surr: Toluene-d8 1.0 98 80 120 Sample 10: 122010_MBLK_6 16 Method Blank Run: SATURNCA_101220A 12120/1 0 13:01 Acetone NO ug/L 20 Benzene NO ug/L 1.0 Carbon tetrachloride NO ug/L 1.0 Chloroform NO ug/L 1.0 Chloromethane NO ug/L 1.0 m+p-Xylenes NO ug/L 1.0 Methyl ethyl ketone NO ug/L 20 Methyiene chloride NO ug/L 1.0 Naphthalene NO ugIL 1.0 o-Xylene NO ug/L 1.0 Toluene NO ug/L 1.0 Xylenes, Total NO ug/L 1.0 Surr: 1,2-0ichlorobenzene-d4 1.0 102 80 120 Surr: Oibromofluoromethane 1.0 94 70 130 Surr: p-Bromofluorobenzene 1.0 98 80 120 Surr: Toluene-d8 1.0 95 80 120 Sample 10: C10120653-004AMS 16 Sample Matrix Spike Run: SATURNCA_101220A 12/20/1 0 20:37 Acetone 960 ug/L 200 96 70 130 Benzene 100 ug/L 10 104 70 130 Carbon tetrachloride 100 ug/L 10 103 70 130 Chloroform 100 ug/L 10 104 70 130 m+p-Xylenes 210 ug/L 10 107 70 130 Methyl ethyl ketone 950 ug/L 200 95 70 130 Methylene chloride 98 ug/L 10 98 70 130 Naphthalene 83 ug/L 10 83 70 130 o-Xylene 110 ug/L 10 105 70 130 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. Page 15 of 19 EN:RGY ! 1\ I.J lJ I ~;\ T ~ ) J ~ I •• www.energylab.com AM/tIfaI~ .. ,m Helena, MY 877-472-0711 • Billings, MT 800-135-4489 • Casper, WY 888-235-0515 Gillette, WY 885-186-7175 • Rapid City, SD 888-&72-1225 • College Stalion, IX 888-691-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 01/14/11 Project: December Groundwater Work Order: C10120641 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: SW8260B Batch: R14111 0 Sample 10: C10120653-004AMS 16 Sample Matrix Spike Run: SATURNCA_l01220A 12120/1020:37 Toluene 110 ug/L 10 108 70 130 Chloromethane 92 ug/L 10 92 70 130 Xylenes, Total 320 ug/L 10 107 70 130 Surr: 1,2-Dichlorobenzene-d4 1.0 96 80 120 Surr: Dibromofluoromethane 1.0 94 70 130 Surr: p-Bromofluorobenzene 1.0 100 80 120 Surr: Toluene-d8 1.0 97 80 120 Sample 10: C10120653-004AMSO 16 Sample Matrix Spike Duplicate Run: SATURNCA_101220A 12120/10 21 :13 Acetone 1100 ug/L 200 110 70 130 14 20 Benzene 110 ug/L 10 10S 70 130 2.7 20 Carbon tetrachloride 110 ug/L 10 108 70 130 4.9 20 Chloroform 110 ug/L 10 114 70 130 9.2 20 Chloromethane 100 ug/l 10 102 70 130 9.9 20 m+p-Xylenes 230 ug/L 10 113 70 130 5.4 20 Methyl ethyl ketone 1100 ug/L 200 105 70 130 10.0 20 Methylene chloride 110 ug/L 10 10S 70 130 7.4 20 Naphthalene 92 ug/L 10 92 70 130 10 20 o-Xylene 110 ug/L 10 111 70 130 5.5 20 Toluene 110 ug/L 10 106 70 130 2.S 20 Xylenes, Total 340 ug/L 10 113 70 130 5.5 20 Surr: 1,2-Dlchlorobenzene-d4 1.0 96 80 120 0.0 10 Surr: Dibromofluoromethane 1.0 103 70 130 0.0 10 Surr: p-Bromofluorobenzene 1.0 103 80 120 0.0 10 Surr: Toluene-d8 1.0 99 80 120 0.0 10 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. Page 16 of 19 EN:RGY I 1\'~DF~'d DHI " www.energylab.com AMIyIIaI EIuIIIMa SInu 1m Helena, MT 871-472-0711 • Billings, MT 80D-735-4489 • Casper, WY 888-235-0515 GillattB, 'NY 86&-888-7175 • Rapid City, SD 888-872-1225 • College Station, TX 888-698-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: December Groundwater Analyte Count Result Units Method: SW8260B Sample 10: Cl0120653-o13AMSO 5 Sample Matrix Spike Duplicate Chloroform Surr: 1 ,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-dB Sample 10: 122110_LCS_4 Chloroform Surr: l,2-Dichlorobenzene-d4 Surr: Dibromofluoromelhane Surr: p-Bromofluorobenzene Surr: Toluene-dB Sample 10: 122110_MBLK_6 Chloroform Surr: 1.2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-dB Sample 10: C10120653-013AMS Chloroform Surr: 1.2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-dB Qualifiers: RL -Analyte reporting limit. 120 ug/L 5 Laboratory Control Sample 10 ug/L 5 Method Blank ND ug/L 5 Sample Matrix Spike 110 ug/L Report Date: 01/14/11 Work Order: C 1 0120641 RL %REC Low limit High Limit RPO RPOLimlt Qual Batch: R141161 Run: SATURNCA_l01221A 12122110 01 :50 10 124 70 130 9.1 20 1.0 106 BO 120 0.0 10 1.0 109 70 130 0.0 10 1.0 lOB BO 120 0.0 10 1.0 100 BO 120 0.0 10 Run: SATURNCA_l01221A 12/21/10 17:59 1.0 101 70 130 1.0 93 BO 120 1.0 95 70 130 1.0 96 BO 130 1.0 97 BO 120 Run: SATURNCA_l01221A 12121/1019:11 1.0 1.0 95 BO 120 1.0 96 70 130 1.0 100 BO 120 1.0 93 BO 120 Run: SATURNCA_l01221A 1212211001 :14 10 114 70 130 1.0 99 BO 120 1.0 100 70 130 1.0 100 BO 120 1.0 101 BO 120 ND -Not detected at the reporting limit. Page 17 of 19 EN:RGY \rl _ • r" ).-<1 ! '-> Helena, tIT 817-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 8I6-IS8-7175 • Rapid City, SD 888-872-1225 • Co/lege Station, 1X 888-681-2218 Workorder Receipt Checklist Denison Mines USA Corp 111111111111111111111111111111111111111111111111111111I C10120641 Login completed by: Corinne Wagner Reviewed by: BL2000\kschroeder Reviewed Date: 12/22/2010 Shipping container/cooler in good condition? Custody seals intact on shipping container/cooler? Custody seals intact on sample bottles? Chain of custody present? Chain of custody signed when relinquished and received? Chain of custody agrees with sample labels? Samples in proper container/bottle? Sample containers intact? Sufficient sample volume for indicated test? All samples received within holding time? ContainerlTemp Blank temperature: Water -VOA vials have zero headspace? Water -pH acceptable upon receipt? Contact and Corrective Action Comments: None Yes III Yes III Yes D Yes III Yes III Yes III Yes III Yes III Yes III Yes III 2°C On Ice Yes III Yes III Date Received: 12/17/2010 Received by: ha No D No D No D No D No D No D No D No D No D No D No D No D Carrier name: FedEx Not Present D Not Present D Not Present III No VOA vials submitted D Not Applicable D Page 18 of 19 "U III (0 CD IU#f{G7 Chain of Custody and Analytical Request Record page_}_Of~ a Company Name: I") t:,N,j (;,J (YJJ~ Report Mail Address: p.o .. ~ ~Or G£r£J _~J ~'IS-// Invoice Addr . ... Sa~ Special Report/Formats: Dow D POTW/VIIWTP D State: D Other: ---- o EDOJEDT(Electronlc Data) Format:, ___ _ o LEVEL IV o NELAC PLEASE PRINT (Provide as much information as posslbl~.) pr~ Name, PWS, Permit, Etc, I Sample Origin EPA/State Compliance: ( / )tu;It~/ t,llllU1j/~ State: v:r Yes ~NoO Contact Name: Phone/Fax: Email: Sampler: (Please Print) Purchase Order: .-~.-<.. ~ ~Yl®O@ ~@(!!J~§@ o '- "'0 Ul 0) ~al~BI(j; .-> 0 >om ~(I)~ ~ ~ 03:~ gj OJ u «001.0 ~ ~ '-all c: "0) C:'':: .~ 8.m.20 ~~I16 ' ::J 0).=11) ~ zCi<t:I5rc E >1 ~ o ~ w t:. :r: 'C t) § « e ~ E « ~ w 'E W (1) CI) -g (1) .. R u 5 Contact ELI prior to RUSH sample submittal for charges and scheduling -See Instruction Page Comments: i ~ I,.; Ij L Receipt Temp cD... DC On Ice: / ' .y N Custody Seal On Bottle Y"" On Coole, • Y N SAMPLE IDENTIFICATION Collection I Collection I MATRIX I (Name. Location, Interval, etc.) Oate Time en H I " Intact I y . N Signature l..., N Match lmt..~ l'f 1 tz/Js/lo l JJOS-I J-tV I lXJ. I I I I I I I I I ~ I'mw 31 11.1//~LLI2I/!20 I /-W I I ~I II II II I I I ~ i 3 mw 2.hI2I1SIIIJ 1130h·tVX'~X )()( )( X ~ 4/YLW .~ 1,t'IIQ1(O 1122.S: l .t-~ I" 1 X'I' 'If I' I' Ix l I ILJ II 5 1m1J lL v:iJ I iJJ/J rJ 2 tf 0 I / -w i X I 1 I I I I I I I I I I ~ 6/'17L4/~~ IL2IJsJlIJJJi3fL l~-N I lXlXlxlx lx lxl I I I I J_, ~ t~/J ~LlI I " 1-~ -1--]-I I' 1 I I I'l l -IT 1 1 ~ 8~~\O~\6.i\n L _L 1_ 1 _ I 1_1 1 J __ L J 1 I I I I 1 ~DI2cV'~1 e ~ I 10 ~ "' ~ustodY sa. Record U; MUST be R~~:(PidJ~ OatefTime: .L.2dh r:JtJ 1:Ja7 §ure: Received by (print): OatefTime: Oatemme: l)ignafure: Received by (prinl): Signalure: Refi,,<!uislfed by (print): Dati!lTlme: (I Slg~UIl): Signed Sample Disposal: Return to Client: lab Disposal: R~~atemma: / J-/; 1/;,/,' ;. / ~ S"ogIIsture: In certain circumstances, samples submitted to Energy Laboratories, Inc. may be subcontracted to other certified laboratories in order to complete the analysis requested, This serves as notice of this possibility. All sub-contract data will be clearly notated on your analytical report. Visit our web site at www.energylab.com for additional information, downloadable fee schedule, forms, and links. TabG Quality Assurance and Data Validation Tables G-IA: Routine Field Data QAJQC Evaluation Time Req'd for 2 Time Pumped Amount Well Sample Date Casings (min) Sufficient? Conductance RPD(%l 3lH MW-l 11118/2010 177.6 190.0 Y 1888 1887 0.05 6.97 6.96 MW-2 11117/2010 114.7 120.0 Y 3785 3790 0.13 6.89 6.91 MW-3 11/19/2010 48.0 50.0 Y 5753 5752 0.02 6.35 6.35 MW-3A 1112212010 60.3 50.0 N 6036 6030 0.10 6.21 6.21 MW-4 lI/15/201O NA 1280 NC 6.79 MW-5 ll1lI/2010 192.9 195.0 Y 6.2 6.3 1.60 7.30 7.31 MW-ll 11/11!2010 243.9 245.0 Y 967.0 966.8 0.02 7.44 7.44 MW-12 1111912010 130.7 115.0 N 4253 4254 0.02 6.48 6.47 MW-14 11110/2010 151.1 155.0 Y 3982 3979 0.08 6.38 6.37 MW-15 11111/2010 183.8 185.0 Y 4369 4366 0.07 6.56 6.57 MW-17 11117/2010 215.1 220.0 Y 4473 4480 0.16 6.57 6.56 MW-18 11118/2010 381.0 385.0 Y 3531 3532 0.Q3 6.37 6.37 MW-19 11118/2010 587.9 605.0 Y 1458 1457 0.07 6.82 6.80 MW-20 11/2212010 28.9 30.0 Y 6766 6765 0.01 7.25 7.25 MW-22 11116/2010 282.3 285.0 Y 6908 6899 0.13 5.63 5.62 MW-23 1112212010 108.0 105.0 N 3946 3931 0.38 6.48 6.44 MW-24 , 1111712010 37.8 35.0 N 4596 4590 0.13 6.12 6.10 MW-25 11110/2010 241.8 265.0 Y 3255 3254 0.03 6.37 6.36 MW-26 11115/2010 NA 3526 NC 6.49 MW-27 11112/2010 263.3 270.0 Y 1565 1564 0.06 6.89 6.89 MW-28 11112/201Q.. 195.7 200.0 Y 4004 4005 0.02 5.73 5.72 MW-29 1119/2010 149.0 150.0 Y 4735 4730 0.11 6.15 6.17 MW-30 1119/2010 201.1 205.0 Y 2083 2079 0.19 6.70 6.75 MW-31 1119/2010 368.4 370.0 Y 1812 1813 0.06 6.98 6.98 MW-32 11110/2010 339.4 345.0 Y 4016 4009 0.17 6.06 6.05 MW-33 Dry_ Dry Dry Dry MW-34 1112912010 N/A N/A N/A 4286 L _fIIC I 7.39 MW-3S 121112010 1.5 1.8 Y 4216 4183 I 0.79 I 7.37 7.46 MW -20 and MW -35 were purged to dryness after 2 casing volumes were purged NI A = The amount of water in the well was insufficient to purge. The pump was not able to operate due to the minimal amount of water. The well was sampled with a bailer. NC = Not Calculated. RP.Q(o/ol Tcn1f CC) RPD(%l Redox Potential (Eh) RPD(%) Turbidi y (NTUt >5NTU RPD(%) 0.14 13.97 13.98 0.07 344 342 0.58 1.8 1.8 N 0.00 0.29 13.81 13.8 0.Q7 420 420 0.00 0 0 N 0.00 0.00 14.42 14.45 0.21 425 426 0.24 0 0 N 0.00 0.00 13.00 12.99 0.08 442 443 0.23 0.5 O.S N 0.00 NC 14.07 NC 392 NC 3 N NC 0.14 14.44 14.44 0.00 299 299 0.00 12.0 12.1 Y 0.83 0.00 14.31 14.30 0.07 317 315 0.63 0 0 N 0.00 0.15 14.7 14.76 0.41 407 407 0.00 138.7 139.2 y 0.'6 0.16 14.35 14.36 0,07 415 415 0.00 0 0 N 0.00 0.15 14.46 14.46 0.00 421 420 0.24 I 1 N 0.00 0.15 14.25 14.28 0.21 411 410 0.24 0 0 N 0.00 0.00 14.02 14.02 0.00 373 372 0.27 0 0 N 0.00 0.29 14.40 14.41 0.07 405 407 0.49 0 0 N 0.00 0.00 15.24 15.19 0.33 419 419 0.00 8.9 8.5 Y 4.60 0.18 14.51 14.5 0.07 448 448 0.00 3.6 3.6 N 0.00 0.62 14.07 14.05 0.14 435 435 0.00 0.7 0.7 N 0.00 0.33 15.69 IS.72 0.19 437 437 0.00 1.2 1.3 N 8.00 0.16 14.36 14.35 0.Q7 429 428 0.23 0.7 0.7 N 0.00 NC 14.87 liC 417 NC 0.3 N_ NC 0.00 14.65 14.66 0.07 427 427 0.00 0 0 N 0.00 0.17 14.47 14.49 0.14 446 445 0.22 0 0 N 0.00 0.32 14.53 14.52 0,07 297 290 2.39 8.4 8.5 Y 1.18 0.74 14.43 14.43 0.00 383 379 1.05 0 0 N 0.00 0.00 14.35 14.34 0.07 397 398 0.25 0 0 N 0.00 0.17 14.05 14.04 0.07 307 300 2.31 8.6 8.5 Y 1.17 Well was dry. NC 10.96 lie 274 I ~C 14.7 N jlJC 1.21 14.19 I 14.35 1.12 279 273 I 2.17 693.1 ISOS Y 73.87 G-IB: Acelerated Field Data QAJQC Evaluation Time Req'd for 2 Time Pumped Amount Well Sample Date Casings (mIn) Sufficient? Conductance RPD(%} pH RPD(%) Temp (0C) RPD(%} Redox Potential (Eb) RPD(%) Turbidity (NTU) <5 (NTU) RPD(%) Accelerated October Monthly MW-Il 10/20/2010 243.6 250.0 Y 2799 2797 0.07 7.49 7.49 0.00 15.70 15.73 0.19 152 150 1.32 0 0 y 0.00 MW-14 10/20/2010 149.7 175.0 Y 3930 3926 0.10 6.59 6.60 0.15 15.02 15.02 0.00 296 295 0.34 0 0 y 0.00 MW-26 10/20/2010 NA 3458 3461 0.09 6.60 6.61 0.15 15.67 15.65 0.13 285 283 0.70 1.1 1.1 Y 0.00 MW-30 10/19/2010 199.7 205.0 Y 2058 2056 0.10 6.79 6.77 0.29 14.98 14.98 0.00 280 272 2.90 0 0 y 0.00 MW-31 1011912010 367.1 370.0 Y 1785 1773 0.67 6.89 6.92 0.43 15.03 15.01 0.13 351 345 1.72 0.1 0.2 Y 66.67 Accelerated December Monthly MW-ll 12/15/2010 246.3 260.0 Y 2927 2924 0.10 7.37 7.37 0.00 14.37 14.38 0.07 192 185 3.71 0 0 y 0.00 MW-14 12115/2010 151.7 155.0 Y 3925 I 3926 0,03 6.46 6.47 0.15 14.14 14.14 0.00 325 325 0.00 0 0 y 0.00 MW-26 12115/2010 NA 3287 NC 6.45 NC 14.82 NC 324 NC 0 Y NC MW-30 12/14/2010 200.2 I 210.0 Y 2077 2078 0.05 6.64 6.65 0.15 14.25 14.25 0.00 341 337 1.18 0 0 y 0.00 MW-31 12114/2010 367.7 I 370.0 Y 1795 1795 0.00 6.97 6.95 0.29 14.35 14.34 0.07 327 327 0.00 0 0 y 0.00 NC -Not Calculated MW -26 is a continuously pumped well. G-2A: Holding Time Evaluation QAPHolding Constituent Time MW-l MW-2 MW-3 MW-3A MW-4 2-Butanone (MEK) 14 days 13 days 6.7 days 12.3 days 9.6 days 8.6 days Acetone 14 days 13 days 6.7 days 12.3 days 9.6 days 8.6 days Ammonia (as N) 28 days 10.9 days 12.1 days 10.2 days 7.2 days 14 days Arsenic 6 months 33.8 days 12.8 days 33.1 days 24.7 days 14.6 days Benzene 14 days 13 days 6.7 days 12.3 days 9.6 days 8.6 days Beryllium 6 months 33.8 days 12.8 days 33.9 days 30.1 days 14.6 days Cadmium 6 months 33.8 days 12.8 days 34.2 days 24.7 days 14.6 days Carbon Tetrachloride 14 days 13 days 6.7 days 12.3 days 9.6 days 8.6 days Chloride (mg/L) 28 days 27 days 6.1 days 26.2 days 23.2 days 7.9 days Chloroform 14 days 13 days 6.7 days 12.3 days 9.6 days 8.6 days Chloromethane 14 days 13 days 6.7 days 12.3 days 9.6 days 8.6 days Chromium 6 months 33.8 days 12.8 days 33.1 days 24.7 days 14.6 days Cobalt 6 months 33.8 days 12.8 days 33.1 days 24.7 days 14.6 days Copper 6 months 33.8 days 12.8 days 33.9 days 30.1 days 14.6 days Dichloromethane (Methylene Chloride) 14 days 13 days 6.7 days 12.3 days 9.6 days 8.6 days Fluoride (Mg/L) 28 days 12.8 days 5.1 days 12 days 9.1 days 6.9 days Gross Alpha minus Rn & U MDC 6 months 13.9 days 97.8 days 13.1 days 10 days 99.4 days Gross Alpha minus Rn & U Precision (±) 6 months 13.9 days 97.8 days 13.1 days 10 days 99.4 days Gross Alpha minus Rn & U 6 months 13.9 days 97.8 days 13.1 days 10 days 99.4 days Iron 6 months 28 days 19.1 days 27.3 days 17.1 days 21 days Lead 6 months 33.8 days 12.8 days 34.2 days 31.2 days 14.6 days Manganese 6 months 33.8 days 12.8 days 33.9 days 24.7 days 14.6 days Mercury 28 days 34.7 days 12.8 days 34.2 days 31.2 days 14.6 days Molybdenum 6 months 33.8 days 12.8 days 34.2 days 24.7 days 14.6 days Naphthalene 14 days 13 days 6.7 days 12.3 days 9.6 days 8.6 days Nickel 6 months 33.8 days 12.8 days 33.9 days 24.7 days 14.6 days Nitrate + Nitrite (as N) 28 days 5.9 days 6.1 days 5.2 days 2.2 days 8 days Selenium 6 months 33.8 days 12.8 days 33.9 days 24.7 days 14.6 days Silver 6 months 33 .8 days 12.8 days 34.2 days 24.7 days 14.6 days Sulfate (mg/L) 28 days 11.9 days 13.1 days 11.1 days 8.1 days 14.9 days TDS (mg/L) 7 days 5.1 days 2.2 days 4.3 days 2.3 days 4 days Tetrahydrofuran 14 days 4.8 days 2 days 4 days 2 days 3.9 days Thallium 6 months 33.8 days 12.8 days 34.2 days 31.2 days 14.6 days Tin 6 months 33.8 days 12.8 days 34.2 days 24.7 days 14.6 days Toluene 14 days 13 days 6.7 days 12.3 days 9.6 days 8.6 days Uranium 6 months 33.8 days 12.8 days 34.2 days 31.2 days 14.6 days Vanadium 6 months 33.8 days 12.8 days 33.1 days 24.7 days 14.6 days Xylenes (total) 14 days 13 days 6.7 days 12.3 days 9.6 days 8.6 days Zinc 6 months 33.8 days 12.8 days 34.2 days 31.2 days 14.6 days Bicarbonate as HC03 14 days 5.2 days 2.3 days 4.4 days 9.3 days 4.1 days Calcium 6 months 28 days 19.1 days 38.1 days 17.1 days 21 days Carbonate as C03 14 days 5.2 days 2.3 days 4.4 days 9.3 days 4.1 days Magnesium 6 months 28 days 19.1 days 38.1 days 17.1 days 21 days Potassium 6 months 28 days 19.1 days 38.1 days 17.1 days 21 days Sodium 6 months 28 days 19.1 days 38.1 days 17.1 days 21 days G-2A: Holding Time Evaluation QAPHolding Constituent Time MW-5 MW-ll MW-12 MW-14 MW-15 2-Butanone (MEK) 14 days 12.4 days 12.5 days 12.3 days 9 days 12.6 days Acetone 14 days 12.4 days 12.5 days 12.3 days 9 days 12.6 days Ammonia (as N) 28 days 6.1 days 6.2 days 10.1 days 7 days 6.2 days Arsenic 6 months 8.8 days 8.9 days 33.1 days 9.7 days 8.9 days Benzene 14 days 12.4 days 12.5 days 12.3 days 9 days 12.6 days Beryllium 6 months 8.8 days 8.9 days 33.1 days 9.7 days 8.9 days Cadmium 6 months 8.8 days 8.9 days 33.1 days 9.7 days 8.9 days Carbon Tetrachloride 14 days 12.4 days 12.5 days 12.3 days 9 days 12.6 days Chloride (mg/L) 28 days 11.8 days 11.9 days 26.2 days 5.8 days 12 days Chloroform 14 days 12.4 days 12.5 days 12.3 days 9 days 12.6 days Chloromethane 14 days 12.4 days 12.5 days 12.3 days 9 days 12.6 days Chromium 6 months 8.8 days 8.9 days 33.1 days 9.7 days 8.9 days Cobalt 6 months 8.8 days 8.9 days 33.9 days 9.7 days 8.9 days Copper 6 months 8.8 days 8.9 days 33.9 days 9.7 days 8.9 days Dichloromethanc (Methylene Chloride) 14 days 12.4 days 12.5 days 12.3 days 9 days 12.6 days Fluoride (Mg/L) 28 days 5.8 days 6 days 12 days 1.9 days 6 days Gross Alpha minus Rn & U MDC 6 months 103.3 days 103.4 days 13.1 days 104.3 days 103.5 days Gross Alpha minus Rn & U Precision (±) 6 months 103.3 days 103.4 days 13.1 days 104.3 days 103.5 days Gross Alpha minus Rn & U 6 months 103.3 days 103.4 days 13.1 days 104.3 days 103.5 days Iron 6 months 22 days 22.1 days 27.2 days 21 days 22.1 days Lead 6 months 8.8 days 8.9 days 34.2 days 9.7 days 8.9 days Manganese 6 months 8.8 days 8.9 days 33.1 days 9.7 days 8.9 days Mercury 28 days 8.8 days 8.9 days 34.2 days 9.7 days 8.9 days Molybdenum 6 months 8.8 days 8.9 days 33.1 days 9.7 days 8.9 days Naphthalene 14 days 12.4 days 12.5 days 12.3 days 9 days 12.6 days Nickel 6 months 8.8 days 8.9 days 33.9 days 9.7 days 8.9 days Nitrate + Nitrite (as N) 28 days 7.9 days 8 days 5.1 days 2 days 8 days Selenium 6 months 8.8 days 8.9 days 33.9 days 9.7 days 8.9 days Silver 6 months 22.8 days 23 days 33.9 days 19.4 days 23 days Sulfate (mg/L) 28 days 18.8 days 19 days 11.1 days 5.9 days 19 days TDS (mg/L) 7 days 5 days 5.2 days 4.3 days 2 days 5.2 days Tetrahydrofuran 14 days 4.8 days 4.9 days 4 days 1.8 days 4.9 days Thallium 6 months 8.8 days 8.9 days 34.2 days 9.7 days 8.9 days Tin 6 months 8.8 days 8.9 days 33.9 days 9.7 days 8.9 days Toluene 14 days 12.4 days 12.5 days 12.3 days 9 days 12.6 days Uranium 6 months 8.8 days 8.9 days 34.2 days 9.7 days 8.9 days Vanadium 6 months 8.8 days 8.9 days 33.1 days 9.7 days 8.9 days Xylenes (total) 14 days 12.4 days 12.5 days 12.3 days 9 days 12.6 days Zinc 6 months 8.8 days 8.9 days 33.9 days 9.7 days 8.9 days Bicarbonate as HC03 14 days 5.1 days 5.3 days 4.4 days 2.4 days 5.3 days Calcium 6 months 22 days 22.1 days 27.2 days 21 days 22.1 days Carbonate as C03 14 days 5.1 days 5.3 days 4.4 days 2.4 days 5.3 days Magnesium 6 months 22 days 22.1 days 27.2 days 21 days 22.1 days Potassium 6 months 22 days 22.1 days 27.2 days 21 days 22.1 days Sodium 6 months 22 days 22.1 days 27.2 days 21 days 22.1 days G-2A: Holding Time Evaluation QAP Holding Constituent Time MW-17 MW-18 MW-19 MW-20 MW-22 2-Butanone (MEK) 14 days 6.5 days 13.2 days 13.1 days 9.5 days 7.5 days Acetone 14 days 6.5 days 13.2 days 13.1 days 9.5 days 7.5 days Ammonia (as N) 28 days 12 days 11.1 days 10.9 days 7 days 13 days Arsenic 6 months 12.7 days 34 days 33.9 days 24.6 days 13.7 days Benzene 14 days 6.5 days 13.2 days 13.1 days 9.5 days 7.5 days Beryllium 6 months 12.7 days 34 days 33.9 days 30 days 13.7 days Cadmium 6 months 12.7 days 34 days 33.9 days 30 days 13 .7 days Carbon Tetrachloride 14 days 6.5 days 13.2 days 13.1 days 9.S days 7.5 days Chloride (mg/L) 28 days 5.9 days 27.2 days 27 days 23.1 days 6.9 days Chlorofonn 14 days 6.5 days 13.2 days 13.1 days 9.5 days 7.5 days Chloromethane 14 days 6.5 days 13.2 days 13.1 days 9.5 days 7.5 days Chromium 6 months 12.7 days 34 days 33.9 days 24.6 days 13.7 days Cobalt 6 months 12.7 days 34 days 33.9 days 24.6 days 13.7 days Copper 6 months 12.7 days 34 days 33.9 days 30 days 13.7 days Oichloromethane (Methylene Chloride) 14 days 6.5 days 13.2 days 13.1 days 9.5 days 7.5 days Fluoride (Mg/L) 28 days 4.9 days 12.9 days 12.8 days 8.9 days 6 days Gross Alpha minus Rn & U MOC 6 months 97.7 days 14 days 13.9 days 9.9 days 98.7 days Gross Alpha minus Rn & U Precision (±) 6 months 97.7 days 14 days 13.9 days 9.9 days 98.7 days Gross Alpha minus Rn & U 6 months 97.7 days 14 days 13.9 days 9.9 days 98.7 days [ron 6 months 19 days 28.2 days 28.1 days 17 days 20 days Lead 6 months 12.7 days 34 days 33.9 days 31.1 days 13.7 days Manganese 6 months 12.7 days 34 days 33.9 days 24.6 days 13.7 days Mercury 28 days 12.7 days 34 days 33.9 days 3l.1 days 13.7 days Molybdenum 6 months 12.7 days 34 days 33.9 days 30 days 13.7 days Naphthalene 14 days 6.5 days 13.2 days 13.1 days 9.5 days 7.5 days Nickel 6 months 12.7 days 34 days 33.9 days 24.6 days 13.7 days Nitrate + Nitrite (as N) 28 days 6 days 6.1 days 6 days 2.1 days 7 days Selenium 6 months 12.7 days 34 days 33.9 days 24.6 days 13.7 days Silver 6 months 12.7 days 34 days 33.9 days 31.1 days 13.7 days Sulfate (mg/L) 28 days 13 days 12 days 11.9 days 8 days 14 days TOS (mg/L) 7 days 2.1 days 5.2 days 5.1 days 2.1 days 3.1 days Tetrahydrofuran 14 days 1.9 days 4.9 days 4.8 days 1.9 days 2.9 days Thallium 6 months 12.7 days 34 days 33.9 days 3l.1 days 13.7 days Tin 6 months 12.7 days 34 days 33.9 days 3l.1 days 13.7 days Toluene 14 days 6.5 days 13.2 days 13.1 days 9.5 days 7.5 days Uranium 6 months 12.7 days 34 days 33.9 days 31.1 days 13.7 days Vanadium 6 months 12.7 days 34 days 33.9 days 24.6 days 13.7 days Xylenes (total) 14 days 6.5 days 13.2 days 13.1 days 9.5 days 7.5 days Zinc 6 months 12.7 days 34 days 33.9 days 3l.1 days 13.7 days Bicarbonate as HC03 14 days 2.2 days 5.3 days 5.2 days 9.2 days 3.2 days Calcium 6 months 19 days 28.2 days 40 days 17 days 20 days Carbonate as C03 14 days 2.2 days 5.3 days 5.2 days 9.2 days 3.2 days Magnesium 6 months 19 days 28.2 days 40 days 17 days 20 days Potassium 6 months 19 days 28.2 days 40 days 17 days 20 days Sodium 6 months 19 days 28.2 days 40 days 17 days 20 days G-2A: Holding Time Evaluation QAPHolding Constituent Time MW-23 MW-24 MW-25 MW-26 MW-27 2-Butanone (MEK) 14 days 9.4 days 6.7 days 9.1 days 8.7 days 11.6 days Acetone 14 days 9.4 days 6.7 days 9.1 days 8.7 days 11.6 days Ammonia (as N) 28 days 7.1 days 12.2 days 7.2 days 14 days 5.2 days Arsenic 6 months 24.7 days 12.9 days 9.8 days 14.7 days 7.9 days Benzene 14 days 9.4 days 6.7 days 9.1 days 8.7 days 11.6 days Beryllium 6 months 30.1 days 12.9 days 9.8 days 14.7 days 7.9 days Cadmium 6 months 30.1 days 12.9 days 9.8 days 14.7 days 7.9 days Carbon Tetrachloride 14 days 9.4 days 6.7 days 9.1 days 8.7 days 11.6 days Chloride (mg/L) 28 days 23.2 days 6.1 days 5.9 days 7.9 days 10.9 days Chloroform 14 days 9.4 days 6.7 days 9.1 days 8.7 days 11.6 days Chloromethane 14 days 9.4 days 6.7 days 9.1 days 8.7 days 11.6 days Chromium 6 months 24.7 days 12.9 days 9.8 days 14.7 days 7.9 days Cobalt 6 months 24.7 days 12.9 days 9.8 days 14.7 days 7.9 days Copper 6 months 30.1 days 12.9 days 9.8 days 14.7 days 7.9 days Dichloromethane (Methylene Chloride) 14 days 9.4 days 6.7 days 9.1 days 8.7 days 11.6 days Fluoride (Mg/L) 28 days 9 days 5.1 days 2 days 6.9 days 5 days Gross Alpha minus Rn & U MDC 6 months 10 days 97.9 days 104.4 days 99.7 days 102.4 days Gross Alpha minus Rn & U Precision (±) 6 months 10 days 97.9 days 104.4 days 99.7 days 102.4 days Gross Alpha minus Rn & U 6 months 10 days 97.9 days 104.4 days 99.7 days 102.4 days Iron 6 months 17.1 days 19.2 days 2l.l days 21 days 21.1 days Lead 6 months 31.2 days 12.9 days 9.8 days 24.6 days 7.9 days Manganese 6 months 24.7 days 12.9 days 9.8 days 14.7 days 7.9 days Mercury 28 days 31.2 days 12.9 days 9.8 days 38 days 7.9 days Molybdenum 6 months 30.1 days 12.9 days 9.8 days 14.7 days 7.9 days Naphthalene 14 days 9.4 days 6.7 days 9.1 days 8.7 days 11.6 days Nickel 6 months 24.7 days 12.9 days 9.8 days 14.7 days 7.9 days Nitrate + Nitrite (as N) 28 days 2.2 days 6.2 days 2.2 days 8 days 7 days Selenium 6 months 24.7 days 12.9 days 9.8 days 14.7 days 7.9 days Silver 6 months 31.2 days 12.9 days 19.6 days 14.7 days 22 days Sulfate (mg/L) 28 days 8.1 days 13.1 days 6.1 days 14.9 days 18 days TDS (mg/L) 7 days 2.2 days 2.3 days 2.1 days 4.1 days 4.2 days Tetrahydrofuran 14 days 2 days 2.1 days 1.9 days 3.9 days 3.9 days Thallium 6 months 31.2 days 12.9 days 9.8 days 24.6 days 7.9 days Tin 6 months 31.2 days 12.9 days 9.8 days 14.7 days 7.9 days Toluene 14 days 9.4 days 6.7 days 9.1 days 8.7 days 11.6 days Uranium 6 months 31.2 days 12.9 days 9.8 days 24.6 days 7.9 days Vanadium 6 months 24.7 days 12.9 days 9.8 days 14.7 days 7.9 days Xylenes (total) 14 days 9.4 days 6.7 days 9.1 days 8.7 days 11.6 days Zinc 6 months 31.2 days 12.9 days 9.8 days 14.7 days 7.9 days Bicarbonate as HC03 14 days 9.3 days 2.4 days 2.6 days 4.2 days 4.3 days Calcium 6 months 17.1 days 19.2 days 21.1 days 21 days 21.1 days Carbonate as C03 14 days 9.3 days 2.4 days 2.6 days 4.2 days 4.3 days Magnesium 6 months 17.1 days 19.2 days 21.1 days 21 days 21.1 days Potassium 6 months 17.1 days 19.2 days 2l.l days 21 days 21.1 days Sodium 6 months 17.1 days 19.2 days 2l.l days 21 days 2l.l days G-2A-Holding Time Evaluation QAPHolding Constituent Time MW-28 MW-29 MW-30 MW-3l MW-32 2-Butanone (MEK) 14 days 11.7 days 13.4 days 10.2 days 10.2 days 9.2 days Acetone 14 days 11.7 days 13.4 days 10.2 days 10.2 days 9.2 days Ammonia (as N) 28 days 5.2 days 8 days 8.2 days 8.1 days 7.1 days Arsenic 6 months 8 days 10.7 days 10.8 days 10.8 days 9.8 days Benzene 14 days 11.7 days 13.4 days 10.2 days 10.2 days 9.2 days Beryllium 6 months 8 days 10.7 days 10.8 days 10.8 days 19.6 days Cadmium 6 months 8 days 10.7 days 10.8 days 10.8 days 9.8 days Carbon Tetrachloride 14 days 11.7 days 13.4 days 10.2 days 10.2 days 9.2 days Chloride (mg/L) 28 days II days 6.8 days 6.9 days 6.8 days 5.8 days Chloroform 14 days 11.7 days 13.4 days 10.2 days 10.2 days 9.2 days Chloromethane 14 days 11.7 days 13.4 days 10.2 days 10.2 days 9.2 days Chromium 6 months 8 days 10.7 days 10.8 days 10.8 days 19.6 days Cobalt 6 months 8 days 10.7 days 10.8 days 10.8 days 19.6 days Copper 6 months 8 days 10.7 days 10.8 days 10.8 days 9.8 days Dichloromethane (Methylene Chloride) 14 days 11.7 days 13.4 days 10.2 days 10.2 days 9.2 days Fluoride (Mg/L) 28 days 5 days 2.9 days 3 days 3 days 2 days Gross Alpha minus Rn & U MDC 6 months 102.S days IOS.3 days 10S.4 days IOS.3 days 104.4 days Gross Alpha minus Rn & U Precision (±) 6 months 102.5 days IOS.3 days IOS.4 days IOS.3 days 104.4 days Gross Alpha minus Rn & U 6 months 102.S days 105.3 days 10S.4 days 10S.3 days 104.4 days Iron 6 months 21.2 days 22 days 22.2 days 22.1 days 21.1 days Lead 6 months 8 days 10.7 days 10.8 days 10.8 days 9.8 days Manganese 6 months 8 days 10.7 days 10.8 days 10.8 days 19.6 days Mercury 28 days 8 days 10.7 days 10.8 days 10.8 days 9.8 days Molybdenum 6 months 8 days 10.7 days 10.8 days 10.8 days 9.8 days Naphthalene 14 days 11.7 days 13.4 days 10.2 days 10.2 days 9.2 days Nickel 6 months 8 days 10.7 days 10.8 days 10.8 days 9.8 days Nitrate + Nitrite (as N) 28 days 7.1 days 3 days 3.2 days 3.1 days 2.1 days Selenium 6 months 8 days 10.7 days 10.8 days 10.8 days 9.8 days Silver 6 months 22 days 20.S days 20.6 days 20.S days 19.6 days Sulfate (mg/L) 28 days 18 days 6.9 days 7.1 days 7 days 6 days TDS (mg/L) 7 days 4.2 days 3 days 3.1 days 3 days 2.1 days Tetrahydrofuran 14 days 3.9 days 2.8 days 2.9 days 2.8 days 1.9 days Thallium 6 months 8 days 10.7 days 10.8 days 10.8 days 9.8 days Tin 6 months 8 days 10.7 days 10.8 days 10.8 days 9.8 days Toluene 14 days 11.7 days 13.4 days 10.2 days 10.2 days 9.2 days Uranium 6 months 8 days 10.7 days 10.8 days 10.8 days 9.8 days Vanadium 6 months 8 days 10.7 days 10.8 days 10.8 days 19.6 days Xylenes (total) 14 days 11.7 days 13.4 days 10.2 days 10.2 days 9.2 days Zinc 6 months 8 days 10.7 days 10.8 days 10.8 days 9.8 days Bicarbonate as HC03 14 days 4.3 days 3.S days 3.6 days 3.5 days 2.S days Calcium 6 months 21.2 days 22 days 22.2 days 22.1 days 21.1 days Carbonate as C03 14 days 4.3 days 3.S days 3.6 days 3.5 days 2.S days Magnesium 6 months 21.2 days 22 days 22.2 days 22.1 days 21.1 days Potassium 6 months 21.2 days 22 days 22.2 days 22.1 days 21.1 days Sodium 6 months 21.2 days 22 days 22.2 days 22.1 days 21.1 days G-2A: Holding Time Evaluation QAP Holding Constituent Time MW-33 MW-34 MW-35 MW-65 MW-70 2-Butanone (MEK) 14 days "'00 2.8 days 9.4 days 9.3 days 13.3 days Acetone 14 days -. 2.8 days 9.4 days 9.3 days 13.3 days Ammonia (as N) 28 days -8.1 days 6.2 days 7.1 days 11.1 days Arsenic 6 months -17.8 days 9.1 days 9.8 days 34 days Benzene 14 days -2.8 days 9.4 days 9.3 days 13.3 days Beryllium 6 months -23.2 days 9.1 days 9.8 days 34 days Cadmium 6 months --17.8 days 9.1 days 9.8 days 34 days Carbon Tetrachloride 14 days -2.8 days 9.4 days 9.3 days 13.3 days Chloride (mg/L) 28 days _. 16.3 days 14.3 days 5.8 days 27.2 days Chloroform 14 days --2.8 days 9.4 days 9.3 days 13.3 days Chloromethane 14 days -2.8 days 9.4 days 9.3 days 13.3 days Chromium 6 months -17.8 days 9.1 days 9.8 days 34 days Cobalt 6 months -17.8 days 9.1 days 9.8 days 34 days Copper 6 months -23.2 days 9.1 days 9.8 days 34 days Dichloromethane (Methylene Chloride) 14 days -2.8 days 9.4 days 9.3 days 13.3 days Fluoride (Mg/L) 28 days --2.2 days 6.1 days 2 days 12.9 days Gross Alpha minus Rn & U MDC 6 months -3.1 days 83.9 days 104.4 days 14 days Gross Alpha minus Rn & U Precision (±) 6 months -3.1 days 83.9 days 104.4 days 14 days Gross Alpha minus Rn & U 6 months --3.1 days 83.9 days 104.4 days 14 days [ron 6 months --10.2 days 9.3 days 21.1 days 28.2 days Lead 6 months --24.3 days 9.1 days 9.8 days 34 days Manganese 6 months -17.8 days 9.1 days 9.8 days 34 days Mercury 28 days _. 36.1 days 9.1 days 9.8 days 34 days Molybdenum 6 months --17.8 days 9.1 days 9.8 days 34 days Naphthalene 14 days --2.8 days 9.4 days 9.3 days 13.3 days Nickel 6 months --17.8 days 9.1 days 9.8 days 34 days Nitrate + Nitrite (as N) 28 days --4.2 days 2.3 days 2.1 days 6.1 days Selenium 6 months -17.8 days 9.1 days 9.8 days 34 days Silver 6 months --23.2 days 37.2 days 19.6 days 34 days Sulfate (mg/L) 28 days _. 7.2 days 5.2 days 6 days 12 days TDS (mg/L) 7 days _. 2.3 days 2.2 days 2.1 days 5.2 days Tetrahydrofuran 14 days --1.1 days 2.1 days 1.9 days 4.9 days Thallium 6 months --24.3 days 9.1 days 9.8 days 34 days Tin 6 months --17.8 days 9.1 days 9.8 days 34 days Toluene 14 days --2.8 days 9.4 days 9.3 days 13.3 days Uranium 6 months --24.3 days 9.1 days 9.8 days 34 days Vanadium 6 months --17.8 days 9.1 days 9.8 days 34 days Xylenes (total) 14 days --2.8 days 9.4 days 9.3 days 13.3 days Zinc 6 months -23.2 days 9.1 days 9.8 days 34 days Bicarbonate as HC03 14 days --2.4 days 2.4 days 2.6 days 5.4 days Calcium 6 months --10.2 days 9.3 days 26 days 28.2 days Carbonate as C03 14 days _. 2.4 days 2.4 days 2.6 days 5.4 days Magnesium 6 months --10.2 days 9.3 days 26 days 28.2 days Potassium 6 months --10.2 days 9.3 days 26 days 28.2 days Sodium 6 months --10.2 days 9.3 days 26 days 28.2 days G-2B: Holding Time Evaluation -Accelerated samples QAPHolding Constituent Time MW-ll MW-14 MW-26 Chloride (mg/L) 28 days ----6.1 days Chloroform 14 days --13.3 days Chloromethane 14 days --13.8 days Chromium 6 months ------ Cobalt 6 months ---- Copper 6 months ------ Dichloromethane (Methylene Chloride) 14 days ----13.8 days Field pH (S.U.) Immediate Fluoride (Mg/L) 28 days ----- Gross Alpha minus Rn & U MDC 6 months ----- Gross Alpha minus Rn & U Precision (±) 6 months ------ Gross Alpha minus Rn & U 6 months ---- Iron 6 months ----- Lab pH (S.U.) ----6 days 6 days Lead 6 months -----,- Manganese 6 months 6.5 days --- Mercury 28 days ---- Molybdenum 6 months ------ Naphthalene 14 days ---13.8 days Nickel 6 months ---- Nitrate + Nitrite (as N) 28 days ---14.3 days Selenium 6 months -_.-- Silver 6 months ---- Sulfate (mglL) 28 days ---- TDS (mg/L) 7 days ----- Tetrahydrofuran 14 days 1.9 days --- Thallium 6 months ------ Tin 6 months ----- Toluene 14 days ----13.8 days Uranium 6 months ----6.6 days G-2B: Holding Time Evaluation -Accelerated samples QAPHolding Constituent Time MW-30 MW-31 MW-ll Chloride (mg/L) 28 days ------ Chloroform 14 days ------ Chloromethane 14 days ----- Chromium 6 months ----- Cobalt 6 months ----- Copper 6 months ---- Dichloromethane (Methylene Chloride) 14 days ------ Field pH (S.U.) Immediate Fluoride (Mg/L) 28 days ----- Gross Alpha minus Rn & U MDC 6 months --- Gross Alpha minus Rn & U Precision (±) 6 months --- Gross Alpha minus Rn & U 6 months ----- Iron 6 months ----- Lab pH (S.U.) ------- Lead 6 months ----- Manganese 6 months ----3D days Mercury 28 days ------ Molybdenum 6 months ---- Naphthalene 14 days ----- Nickel 6 months ---- Nitrate + Nitrite (as N) 28 days 15.2 days 15 .1 days -- Selenium 6 months 7.5 days --- Silver 6 months ---- Sulfate (mg/L) 28 days ---- TDS (mg/L) 7 days --- Tetrahydrofuran 14 days ---1.9 days Thallium 6 months ---- Tin 6 months ----- Toluene 14 days ----- Uranium 6 months ----- G-2B: Holding Time Evaluation -Accelerated samples QAPHolding Constituent Time MW-14 MW-26 MW-30 Chloride (mg/L) 28 days --5.2 days -- Chloroform 14 days -5.8 days -- Chloromethane 14 days -5.8 days -- Chromium 6 months ----- Cobalt 6 months ------ Copper 6 months --_.--- Dichloromethane (Methylene Chloride) 14 days --5.8 days -- Field pH (S.u.) Immediate Fluoride (Mg/L) 28 days ----- Gross Alpha minus Rn & U MDC 6 months ---- Gross Alpha minus Rn & U Precision (±) 6 months ---- Gross Alpha minus Rn & U 6 months ---- Iron 6 months ---- Lab pH (S.U.) -5 days 5 days -- Lead 6 months ----- Manganese 6 months ----- Mercury 28 days ----- Molybdenum 6 months ----- Naphthalene 14 days -5.8 days -- Nickel 6 months ---- Nitrate + Nitrite (as N) 28 days -6.1 days 7 days Selenium 6 months ---21.5 days Silver 6 months ---- Sulfate (mg/L) 28 days --- TDS (mg/L) 7 days ---- Tetrahydrofuran 14 days ---- Thallium 6 months ----- Tin 6 months ------ Toluene 14 days --5.8 days - Uranium 6 months --20.5 days -- G-2B: Holding Time Evaluation -Accelerated samples QAPHolding Constituent Time MW-31 Chloride (mg/L) 28 days -- Chloroform 14 days -- Chloromethane 14 days - Chromium 6 months - Cobalt 6 months -- Copper 6 months -- Dichloromethane (Methylene Chloride) 14 days -- Field pH (S.U.) Immediate Fluoride (Mg/L) 28 days -- Gross Alpha minus Rn & U MDC 6 months -- Gross Alpha minus Rn & U Precision (±) 6 months -- Gross Alpha minus Rn & U 6 months -- Iron 6 months -- Lab pH (S.U.) ---- Lead 6 months -- Manganese 6 months - Mercury 28 days -- Molybdenum 6 months - Naphthalene 14 days -- Nickel 6 months -- Nitrate + Nitrite (as N) 28 days 6.9 days Selenium 6 months -- Silver 6 months - Sulfate (mg/L) 28 days -- TDS (mg/L) 7 dl!Ys - Tetrahydrofuran 14 days - Thallium 6 months ,- Tin 6 months - Toluene 14 days - Uranium 6 months - G-3A: Laboratory Receipt Temperature Check Sample Batch Wells in Batch Temperature 1011246* MW-14, MW-25, MW-29, MW-30, 3.5 ac MW-31, MW-32, MW-65 1011302* MW-5, MW-l1, MW-15,MW-27, 2.9 ac MW-28 1011399* MW-2, MW-4, MW-17, MW-22, MW-0.6°C 24, MW-26, 1011452* MW-l, MW-3, MW-12, MW-18, MW-2.3 aC 19, MW-70 1011479* MW-3A, MW-20, MW-23 3.1 ac 1011504* MW-34R, MW-34 3.3 ac 1012066* MW-35 3.8 ac MW-14, MW-25, MW-29, MW-30, 3.0 ac CI0I10505 MW-31, MW-32, MW-65 MW-5, MW-11, MW-15, MW-27, 3.0 ac CI0110584 MW-28 MW-2,MW-4, MW-17,MW-22, MW-2.0 ac CI0I10730 24, MW-26, CI0110844 MW-1, MW-3, MW-12, MW-18,MW-2.0°C 19, MW-70 C10110870 MW-3A,MW-20,MW-23 3.0 ac C10110928 MW-34R, MW-34 2.0°C C10120105 MW-35 3.0 ac G-38: Laboratory Receipt Temperature Check -Accelerated Samples Samp le Balch Wells in Batch Temperature 1010330· MW-I I 5.3 ·C C10100941 MW-I I, MW-14, MW-26, MW30, MW-31, 4.0 ·C MW-65 1012345· MW-il 2.2 ·C C10120641 MW-l l, MW-14, MW-26, MW30, MW-3 J, 2.0 ·C MW-65 G-4I\: i\nalytieal Method Check T Q-4fJ: Analytical Melhod Ctux:k • Acccicrall:d SamplCll " I G-5A: Routine Reporting Limit Check MW-l MW-2 QAP Reporting Constituent Limit RL Qualifier RL Qualifier 2-Butanone (MEK) 20 ~g/L 20 ug/L U 20 ug/L U Acetone 20 ~g/L 20 ug/L U 20 ug/L U Ammonia (as N) 0.05 mg/L 0.05 mg/L 0.05 mg/L U Arsenic 5 ~g/L 5 ug/L U 5 ug/L U Benzene 1.0 l:l:g/L 1 ug/L U lugiL U Beryllium 0.50 ~g/L 0.5 ug/L U 0.5 ug/L U Cadmium 0.50 ~g/L 0.5 ug/L U 0.5 ug/L U Carbon Tetrachloride 1.0 ~g/L 1 ug/L U 1 ug/L U Chloride_{mg/L) 1 mg/L 1 mg/L 1 mg/L Chloroform 1.0 ~g/L 1 ug/L U 1 ug/L U Chloromethane 1.0 ~g/L 1 ug/L U 1 ug/L U Chromium 25 ~g/L 25 ug/L U 25 ug/L U Cobalt 10 ~glL 10 ugiL U 10 ug/L U Copper 10 ~g/L 10 ugiL U 10 ug/L U Dichloromethane (Methylene Chloride) l.0 ~g/L lugiL U lugiL U Fluoride (Mg/L) 0.1 mg/L 0.1 mg/L 0.1 mg/L Gross Alpha minus Rn & U MDC 1.0pCilL o pCilL o pCilL Iron 30 ~g/L 30 ug/L 30 ug/L U Lead 1.0 ~g/L 1 ug/L U 1 ug/L U Manganese 10 ~g/L 10 ug/L 10 ugiL U Mercury 0.50 ~g/L 0.5 ug/L U 0.5 ug/L U Molybdenum 10 ~g/L 10 ugiL U 10 ug/L U Naphthalene l.0 Ilg/L 1 ug/L U 1 ug/L U Nickel 20 ~g/L 20 ug/L U 20 ugIL U Nitrate + Nitrite (as N) 0.1 mg/L 0.1 mg/L U 0.1 mg/L U Selenium 5 Ilg/L 5 ug/L U 5 ug/L Silver 10 ~g/L 10 ug/L U 10 ug/L U Sulfate (mg/L) 1 mg/L 20 mg/L D 50 mg/L D TDS (mg/L) 10 mg/L 10 mg/L 10 mg/L Tetrahydrofuran 1.0 Ilg/L 1 ~g/L 1 ~g/L Thallium 0.50 ~g/L 0.5 ug/L U 0.5 ug/L U Tin 100 ~g/L 100 ug/L U 100 ug/L U Toluene l.O~glL 1 ug/L U 1 ug/L U Uranium 0.30 ~glL 0.3 ug/L 0.3 ugIL Vanadium 15 !J,g/L 15 ugiL U 15 ug/L U Xylenes (total) l.0 !J,g/L 1 ug/L U 1 ug/L U Zinc 10 ~g/L 10 ug/L U 10 ug/L U Bicarbonate as RC03 1 mg/L 1 mg/L 1 mg/L Calcium 0.5 mg/L 0.5 mg/L 1 mg/L D Carbonate as C03 1 mg/L 1 mg/L U 1 mg/L U Magnesium 0.5 mg/L 0.5 mg/L 0.5 mg/L Potassium 0.5 mg/L 0.5 mglL 0.5 mglL Sodium 0.5 mg/L 0.6 mg/L D 1 mg/L D G-5A: Routine Reporting Limit Check MW-3 MW-3A MW-4 Constituent RL Qualifier RL Qualifier RL Qualifier 2-Butanone (MEK) 20 ug/L U 20 uglL U 20 ugIL U Acetone 20 uglL U 20 ug/L U 20 ug/L U Am monia (as N) 0.05 mg/L 0.05 mglL 0.05 mglL U Arsenic 5 ug/L U 5 ug/L U 5 ug/L U Benzene 1 ug/L U 1 ug/L U 1 ug/L U Beryllium 0.5 ug/L U 0.5 ug/L 0.5 ug/L U Cadmium 0.5 ug/L 0.5 ug/L 0.5 uglL U Carbon Tetrachloride 1 ug/L U 1 ug/L U 1 ug/L Chloride (mg/L) 1 mg/L 1 mg/L 1 mg/L Chloroform lugiL U 1 ug/L U 100 ug/L D Chloromethane 1 ug/L U 1 ug/L U 1 ug/L U Chromium 25 ug/L U 25 ug/L U 25 ug/L U Cobalt 10 ug/L U 10 ug/L U 10 ug/L U Copper 10 ugiL U 10 ugiL U 10 ug/L U Dichloromethane (Methylene Chloride) 1 ug/L U 1 ug/L U 1 ug/L U Fluoride (MglL) 0.1 mg/L 0.1 mglL 0.1 mg/L Gross Alpha minus Rn & U MDC o pCilL o pCilL o pCilL Iron 30 ug/L U 30 ugiL U 30 ug/L U Lead 1 ug/L U 1 ug/L U 1 ug/L U Manganese 10 ugiL 10 ug/L 10 ugiL U Mercury 0.5 ug/L U 0.5 ug/L U 0.5 ug/L U Molybdenwll 10 ug/L U 10 ug/L U 10 ugiL U NaphthaJene 1 ug/L U 1 ug/L U 1 ug/L U Nickel 20 ug/L U 20 ugiL U 20 ugiL U Nitrate + Nitrite (as N) 0.1 mg/L 0.1 mg/L 0.5 mg/L D Selenium 5ug/L 5 ug/L 5 ug/L Silver 10 ug/L U 10 ug/L U 10 ug/L U Sulfate (mg/L) 50 mg/L D 100 mg/L D 50 mg/L D TOS (mg/L) 16 mg/L D 17 mg/L D 10 mg/L Tetrahydrofuran 1 !!g/L 1 !!g/L 1 !!g/L Thallium O.5ug/L 0.5 ug/L 0.5 ug/L U Tin 100 ug/L U 100 ug/L U 100 ugiL U Toluene 1 ug/L U 1 ug/L U 1 ug/L U Uranium 0.3 ug/L 0.3 ug/L 0.3 ug/L Vanadium 15 ugiL U 15 ug/L U 15 ug/L U Xylenes (total) 1 ug/L U 1 ug/L U 1 ug/L U Zinc 10 ug/L 10 ug/L 10 ug/L U Bicarbonate as RC03 1 mg/L 1 mg/L 1 mglL Calcium 1 mglL D 1 mg/L D 0.5 mg/L Carbonate as C03 1 mglL U 1 mg/L U 1 mg/L U Magnesium 0.5 mglL 0.5 mg/L 0.5 mglL Potassium 0.5 mg/L 0.5 mg/L 0.5 mg/L Sodium 1 mg/L D 1 mg/L D 0.6 mglL D G-5A: Routine Reporting Limit Check 0.05 MW-5 MW-ll MW-12 Constituent RL Qualifier RL Qualifier RL Qualifier 2-Butanone (MEK) 20 ug/L U 20 ug/L U 20 ug/L U Acetone 20 ug/L U 20 ug/L U 20 ug/L U Ammonia (as N) 0.05 mg/L 0.05 mg/L 0.05 mg/L Arsenic 5 ug/L U 5 ug/L U 5 ug/L U Benzene 1 ug/L U 1 ug/L U 1 ug/L U Beryllium 0.5 ug/L U 0.5 ug/L U 0.5 ug/L U Cadmium 0.5 ug/L U 0.5 ug/L U 0.5 ug/L U Carbon Tetrachloride 1 ug/L U 1 ug/L U 1 ug/L U Chloride (mg/L) 1 mg/L 1 mg/L 1 mg/L Chloroform 1 ug/L U 1 ug/L U 1ug/L U Chloromethane 1 ug/L U 1ug/L U 1 ug/L U Chromium 25 ug/L U 25 ug/L U 25 ug/L U Cobalt 10 ug/L U 10 ug/L U 10 ug/L U Copper 10 ug/L U 10 ug/L U 10 ug/L U Dichloromethane (Methylene Chloride) 1 ug/L U 1 ug/L U 1 ug/L U .Fluoride (Mg/L) 0.1 mg/L 0.1 mg/L 0.1 mg/L Gross Alpha minus Rn & U MDC o pCi/L o pCi/L o pCilL Iron 30 ug/L 30 ug/L 30 ug/L U Lead 1 ug/L U 1 ug/L U 1 ug/L U Manganese 10 ug/L 10 ug/L 10 ug/L Mercury 0.5 ug/L U 0.5 ug/L U 0.5 ug/L U Molybdenum 10 ug/L U 10 ug/L U 10 ug/L U Naphthalene 1 ug/L U 1 ug/L U 1 ug/L U Nickel 20 ug/L U 20 ug/L U 20 ug/L U Nitrate + Nitrite (as N) 0.1 mg/L 0.1 mg/L U 0.1 mg/L U Selenium 5 ug/L U 5ug/L U 5 ug/L Silver 10 ug/L U 10 ug/L U 10 ug/L U Sulfate (mg/L) 50 mg/L D 50 mg/L D 50 mg/L D TOS (mg/L) 10 mg/L 10 mg/L 11 mg/L D Tetrahydr:ofuran 1 /lg/L 1 /lg/L 1 J.lg/L Thallium 0.5 ug/L U 0.5 ug/L U 0.5 ug/L U Tin 100 ug/L U 100 ug/L U 100 ug/L U Toluene 1 ug/L U 1 ug/L U 1 ug/L U Uranium 0.3 ug/L 0.3 ug/L 0.3 ug/L Vanadium 15 ug/L U 15 ug/L U 15 ug/L U Xy1enes (total) 1ug/L U 1 ug/L U 1 ug/L U Zinc 10 ug/L U 10 ug/L U 10 ug/L U Bicarbonate as HC03 1 mg/L 1 mg/L 1 mg/L Calcium 0.5 mg/L 0.5 mg/L 1 mg/L D Carbonate as C03 1 mg/L U 1 mg/L U 1 mg/L U Magnesium 0.5 mg/L 0.5 mg/L 0.5 mg/L Potassium 0.5 mg/L 0.5 mg/L 0.5 mg/L Sodium 0.6 mg/L D 0.6 mg/L D 1 mg/L D G-5A: Routine Reporting Limit Check MW-14 MW-15 MW-17 Constituent RL Qualifier RL Qualifier RL Qualifier 2-Butanone (MEK) 20 ug/L U 20 ug/L U 20 ug/L U Acetone 20 ugiL U 20 ugiL U 20 ug/L U Ammonia (as N) 0.05 mg/L 0.05 mg/L U 0.05 mg/L 0 Arsenic 5 ug/L U 5 ug/L U 5 ug/L U Benzene 1 ug/L U 1 ug/L U 1 ug/L U Beryllium 0.5 ug/L U 0.5 ug/L U 0.5 ug/L U Cadmium 0.5 ugiL 0.5 ugiL U 0.5 ug/L U Carbon Tetrachloride 1 ug/L U 1 ug/L U 1 ug/L U Chloride (mg/L) 1 mg/L 1 mg/L 0 1 mg/L 0 Chloroform 1 ug/L U 1 ug/L U 1 ug/L U Chloromethane 1 ug/L U lugiL U 1 ug/L U Chromium 25uglL U 25 ugiL U 25 ug/L U Cobalt 10 ug/L U 10 ug/L U 10 ug/L U Copper 10 ug/L U 10 ug/L U 10 ug/L U Dichloromethane (Methylene Chloride) 1 ug/L U 1 ug/L U 1 ug/L U Fluoride (Mg/L) 0.1 mg/L 0.1 mg/L 0 0.1 mg/L 0 Gross Alpha minus Rn & U MDC o pCilL o pCilL o pCilL Iron 30 ug/L U 30 ug/L U 30 ug/L U Lead 1 ug/L U lugiL U 1 ug/L U Manganese 10 ug/L 10 ug/L U 10 ug/L 0 Mercury 0.5 ugiL U 0.5 ug/L U 0.5 ugiL U Molybdenum 10 uglL U 10 ug/L U 10 ug/L U Naphthalene 1 ug/L U 1 ug/L U 1 ug/L U Nickel 20 ug/L U 20 ug/L U 20 ug/L U Nitrate + Nitrite (as N) 0.1 mg/L U 0.1 mg/L 0 0.1 mg/L 0 Selenium 5 ug/L U 5 ug/L 0 5 uglL 0 Silver 10 ug/L U 10 ug/L U 10 ug/L U Sulfate (mg/L) 50 mg/L D 50 mg/L D 50 mglL D TDS (mg/L) 10 mg/L 11 mg/L D 11 mg/L D Tetrahydrofuran 1 /lg/L 1 /lg/L 1 /lg/L Thallium 0.5 ug/L U 0.5 ugiL U 0.5 ug/L 0 Tin 100 ug/L U 100 ug/L U 100 ug/L U Toluene 1 ug/L U 1 ug/L U 1 ug/L U Uranium 0.3 ug/L 0.3 ug/L 0 0.3 ug/L 0 Vanadium 15 ug/L U 15 ug/L U 15 ug/L U Xylenes (total) lugiL U 1 ug/L U 1 ug/L U linc 10 ug/L 10 ug/L U 10 ug/L U Bicarbonate as RC03 1 mg/L 1 mg/L 0 1 mg/L 0 Calcium 1 mg/L D 1 mg/L D 1 mg/L D Carbonate as C03 1 mg/L U 1 mg/L U 1 mg/L U Magnesium 0.5 mglL 0.5 mg/L 0 0.5 mglL 0 Potassium 0.5 mg/L 0.5 mg/L 0 0.5 mglL 0 Sodium 1 mg/L D 1 mg/L D 1 mg/L D G-5A: Routine Reporting Limit Check MW-18 MW-19 MW-20 Constituent RL Qualifier RL Qualifier RL Qualifier 2-Butanone (MEK) 20 ug/L U 20 ug/L U 20 ug/L U Acetone 20 ug/L U 20ug/L U 20 ug/L U Ammonia (as N) 0.05 mg/L 0.05 mg/L U 0.05 mg/L Arsenic 5 ug/L U 5 ug/L U 5 ug/L U Benzene 1 ug/L U 1 ug/L U 1 ug/L U Beryllium 0.5 ug/L U 0.5 ug/L U 0.5 ug/L U Cadmium 0.5 ug/L U 0.5 ug/L U 0.5 ug/L U Carbon Tetrachloride 1 ug/L U 1 ug/L U 1 ug/L U Chloride (mg/L) 1 mg/L 1 mg/L 1 mg/L CWorofo m1 1 ug/L U 1 ug/L U 1 ug/L U Chloromethane 1 ug/L U 1 ug/L U 1 ug/L U Chromium 25 ug/L U 25 ug/L U 25 ug/L U Cobalt 10 ug/L U 10 ug/L U 10 ug/L U Copper 10 ug/L U 10 ug/L U 10 ug/L U Dichloromethane (Methylene Chloride) 1 ug/L U 1 ug/L U 1 ug/L U Fluoride (MglL) 0.1 mg/L 0.1 mg/L 0.1 mg/L Gross Alpha minus Rn & U MDC o pCilL o pCilL o pCilL Iron 30 ug/L 30 ug/L U 30 ug/L U Lead 1 ug/L U 1 ug/L U 1 ug/L U Manganese 10 ug/L 10 ug/L U 10 ug/L U Mercu~ 0.5 ug/L U 0.5 ug/L U 0.5 ug/L U Molybdenum 10 ugiL U 10 ug/L U 10 ug/L U Naphthalene 1 ug/L U 1 ug/L U 1 ug/L U Nickel 20 ug/L U 20 ug/L U 20 ug/L U Nitrate + Nitrite (as N) 0.1 mg/L U 0.2 mg/L D 0.5 mg/L D Selenium 5uglL U 5 ug/L 5ug/L U Silver 10 ug/L U 10 ug/L U 10 ug/L U Sulfate (mg/L) 50 mg/L D 10 mg/L D 50 mg/L D TDS (mg/L) 10 mg/L 10 mg/L 16 mg/L D Tetrahydrofuran 1 /!g/L 1 /!g/L 1 Ilg/L Thallium 0.5 ugiL 0.5 ug/L U 0.5 ug/L U Tin 100 ug/L U 100 ug/L U 100 ug/L U Toluene 1 ug/L U 1 ug/L U 1 ug/L Uranium 0.3 ug/L 0.3 ug/L 0.3 ug/L Vanadium 15 ug/L U 15 ug/L U 15 ug/L U Xylenes (total) lugiL U 1 ug/L U lugiL Zinc 10 ug/L U 10 ug/L U 10 ug/L Bicarbonate as RC03 1 mg/L 1 mg/L 1 mg/L Calcium 1 mg/L D 0.5 mg/L 1 mg/L D Carbonate as C03 1 mg/L U 1 mg/L U 1 mg/L U Magnesium 0.5 mgjL 0.5 mg/L 0.5 mg/L Potassium 0.5 mg/L 0.5 mg/L 0.5 mg/L Sodium 1 mg/L D 0.6 mg/L D 1 mg/L D G-5A: Routine Reporting Limit Check MW-22 MW-23 MW-24 Constituent RL Qualifier RL Qualifier RL Qualifier 2-Butanone (MEK) 20 ug/L U 20 ug/L U 20 ug/L U Acetone 20 ug/L U 20 ug/L U 20 ug/L U Ammonia (as N) 0.05 mg/L 0.05 mg/L U 0.05 mg/L 0 Arsenic 5ug/L U 5 ug/L U 5 ug/L U Benzene 1 ug/L U 1 ug/L U 1 ug/L U Beryllium 0.5 ug/L 0.5 ug/L U 0.5 ug/L U Cadmium 0.5 ug/L 0.5 ug/L U 0.5 ug/L 0 Carbon Tetrachloride 1 ug/L U 1 ug/L U lug/L U Chloride (mglL) 1 mg/L 1 mg/L 1 mg/L 0 Chloroform 1 ug/L U 1 ug/L U lug/L U Chloromethane 1 ug/L U 1 ug/L U 1 ug/L U Chromium 25 ug/L U 25 ug/L U 25 ug/L U Cobalt 10 ug/L 10 ug/L U 10 ug/L U Copper 10 ug/L U 10 ug/L U 10 ug/L U Dichloromethane (Methylene Chloride) lug/L U 1 ug/L U 1 ug/L U Fluoride (Mg/L) 0.1 mg/L 0.1 mg/L 0.1 mg/L 0 Gross Alpha minus Rn & U MDC o pCiIL o pCilL o pCilL Iron 30 ug/L 30 ug/L U 30 ug/L 0 Lead 1 ug/L U 1 ug/L U 1 ug/L U Manganese 10 ug/L 10 ug/L 10 ug/L 0 Mercury 0.5 ug/L U 0.5 ug/L U 0.5 ug/L U Molybdenum 10 ug/L 10 ug/L U 10 ug/L U Naphthalene 1 ug/L U 1 ug/L U 1 ug/L U Nickel 20 ug/L 20 ug/L U 20 ug/L 0 Nitrate + Nitrite (as N) 0.1 mg/L 0.1 mg/L 0.2 mg/L D Selenium 5ug/L 5ug/L U 5 ug/L U Silver 10 ug/L U 10 ug/L U 10 ug/L U Sulfate (mg/L) 100 mg/L D 50 mg/L D 50 mg/L D TDS (mg/L) 17 mg/L D 10 mg/L 11 mg/L D Tetrahydrofuran 1 Jlg/L 1 Ilg/L 1 Ilg/L Thallium 0.5 ug/L 0.5 ug/L 0.5 ug/L 0 Tin 100 ug/L U 100 ug/L U 100 ug/L U Toluene 1 ug/L U 1 ug/L U 1 ug/L U Uranium 0.3 ug/L 0.3 ug/L 0.3 ug/L 0 Vanadium 15 ug/L U 15 ug/L U 15 ug/L U Xylenes (total) 1 ug/L U lug/L U 1 ug/L U Zinc 10 ug/L 10 ug/L 10 ug/L 0 Bicarbonate as RC03 1 mg/L 1 mg/L 1 mg/L 0 Calcium 1 mg/L D 1 mg/L D 1 mg/L D Carbonate as C03 1 mg/L U 1 mg/L U 1 mg/L U Magnesium 0.5 mg/L 0.5 mglL 0.5 mglL 0 Potassium 0.5 mg/L 0.5 mg/L 0.5 mg/L 0 Sodium 1 mg/L D 1 mg/L D 1 mg/L D G-5A: Routine Reporting Limit Check MW-25 MW-26 MW-27 Constituent RL Qualifier RL Qualifier RL Qualifier 2-Butanone (MEK) 20 ug/L U 20 ugiL U 20 ug/L U Acetone 20 ug/L U 20 ug/L U 20 ug/L U Ammonia (as N) 0.05 mg/L 0 0.05 mg/L 0 0.05 mg/L U .Arsenic 5 ug/L U 5 ug/L U 5 ug/L U Benzene 1ug/L U 1ug/L U 1 ug/L U Beryllium 0.5 ug/L U 0.5 ug/L U 0.5 ug/L U Cadmium 0.5 ug/L 0 0.5 ug/L U 0.5 ug/L U Carbon Tetrachloride 1 ug/L U lug/L U 1 ug/L U Chloride (mg/L) 1 mg/L 0 1 mg/L 0 1 mglL 0 Chloroform 1 ug/L U 100 ug/L D 1 ug/L U Chloromethane 1 ug/L U 1 ug/L U 1 ug/L U Chromium 25 uglL U 25 uglL U 25 ug/L U Cobalt 10 ug/L U 10 ug/L U 10 ug/L U Copper 10 ug/L U 10 ug/L U 10 uglL U Dichloromethane (Methylene Chloride) 1 ug/L U 1 uglL 0 1 ug/L U Fluoride (Mg/L) 0.1 mglL 0 0.1 mg/L 0 0.1 mg/L 0 Gross Alpha minus Rn & U MDC o pCilL o pCi/L o pCilL Iron 30 ug/L U 30 ug/L 0 30 ug/L U Lead 1 ug/L U 1 ug/L U 1 ug/L U Manganese 10 ug/L 0 10 ug/L 0 10 ug/L U Mercury 0.5 ug/L U 0.5 ug/L U 0.5 ug/L U Molybdenum 10 ug/L U 10 ug/L U 10 ug/L U Naphthalene 1 ug/L U 1 ug/L U 1 ug/L U Nickel 20 ug/L U 20ug/L U 20 ug/L U Nitrate + Nitrite (as N) 0.1 mglL U 0.1 mglL 0 0.5 mg/L D Selenium 5 ug/L U 5 ug/L U 5 ug/L 0 Silver 10 ug/L U 10 ug/L U 10 ug/L U Sulfate (mglL) 50 mg/L D 50 mg/L D 10 mg/L D TDS (mgIL) 10 mg/L 0 10 mg/L 0 10 mg/L 0 Tetrahydrofuran 1 Ilg /L 1 Ilg/L 1 /lg/L Thallium 0.5 uglL 0 0.5 ug/L U 0.5 ug/L U Tin 100 ug/L U 100 ug/L U 100 ug/L U Toluene 1 ug/L U 1 ug/L U 1 ug/L U Uranium 0.3 ug/L 0 0.3 ug/L 0 0.3 ug/L 0 Vanadium 15 ug/L U 15 ug/L U 15 ug/L U Xylenes (total) 1 ug/L U 1 ug/L U 1 ug/L U Zinc 10 ug/L U 10 ug/L U 10 ug/L U Bicarbonate as RC03 1 mg/L 0 1 mg/L 0 1 mg/L 0 Calcium 1 mg/L D 1 mg/L D 0.5 mg/L 0 Carbonate as C03 1 mg/L U 1 mg/L U 1 mg/L U Magnesium 0.5 mg/L 0 0.5 mg/L 0 0.5 mg/L 0 Potassium 0.5 mg/L 0 0.5 mg/L 0 0.5 mg/L 0 Sodium 1 mg/L D 1 mg/L D 0.6 mg/L D G-5A: Routine Reporting Limit Check MW-28 MW-29 MW-30 Constituent RL Qualifier RL Qualifier RL Qualifier 2-Butanone (MEK) 20 ug/L U 20 ug/L U 20 uglL U Acetone 20 ug/L U 20 ug/L U 20 ug/L U Ammonia (as N) 0.05 mg/L 0.05 mg/L 0.05 mg/L Arsenic 5 ug/L 5 ug/L U 5 ug/L U Benzene 1 ug/L U 1 UglL U lug/L U Beryllium 0.5 ug/L U 0.5 ug/L U 0.5 ug/L U Cadmium 0.5 ug/L 0.5 ug/L U 0.5 ug/L U Carbon Tetrachloride 1 ug/L U 1 ug/L U lug/L U Chloride (mglL) 1 mglL 1 mg/L 1 mg/L Chloroform 1 ug/L U 1 ug/L U 1 ug/L U Chloromethane 1 ug/L U 1 ug/L U lug/L U Chromium 25 uglL U 25 ug/L U 25 ug/L U Cobalt 10 ug/L 10 ug/L U 10 ug/L U Copper 10 ug/L U 10 ug/L U 10 ug/L U Dichloromethane (Methylene Chloride) 1 ug/L U 1 ug/L U 1 uglL U Fluoride (MglL) 0.1 mg/L 0.1 mg/L 0.1 mg/L Gross AJpha minus Rn & U MDC OpCi/L o pCilL o pCilL Iron 30 ug/L 30 ug/L 30 ug/L Lead 1 ug/L U 1 ug/L U 1 ug/L U Manganese 10 ug/L 10 ug/L 10 ug/L Mercury 0.5 ug/L U 0.5 ug/L U 0.5 ug/L U Molybdenum 10 ug/L U 10 ug/L U 10 ug/L U Naphthalene 1 ug/L U 1 ug/L U 1 ug/L U Nickel 20 ug/L 20 ug/L U 20 ug/L U Nitrate + Nitrite (as N) 0.1 mg/L 0.1 mglL U 1 m g/L D Selenium 5 ug/L U 5 ug/L U 5 ug/L Silver 10 ug/L U 10 ug/L U 10 ug/L U Sulfate (mg/L) 50 mglL D 50 mg/L D 50 mg/L D TDS (mglL) 10 mg/L 12 mg/L D 10 mg/L Tetrahydrofuran 1 )!g/L 1 Ilg/L 1 llg/L Thallium 0.5 ug/L 0.5 uglL U 0.5 ug/L U Tin 100 ug/L U 100 uglL U 100 ug/L U Toluene 1 ug/L U 1 ug/L U 1 ug/L U Uranium 0.3 ug/L 0.3 ug/L 0.3 ug/L Vanadium 15 ug/L U 15 ug/L U 15 ug/L U Xylenes (total) 1 ug/L U 1 ug/L U 1 ug/L U Zinc 10 ug/L 10 ug/L 10 ug/L U Bicarbonate as RC03 1 mg/L 1 mg/L 1 mg/L Calcium 1 mg/L D 1 mg/L D 0.5 mg/L Carbonate as C03 1 mg/L U 1 mg/L U 1 mg/L U Magnesium 0.5 mg/L 0.5 mg/L 0.5 mg/L Potassium 0.5 mg/L 0.5 mg/L 0.5 mg/L Sodium 1 mg/L D 1 mg/L D 0.6 mg/L D G-5A: Routine Reporting Limit Check MW-31 MW-32 MW-33 Constituent RL Qualifier RL Qualifier RL Qualifier 2-Butanone (MEK) 20 ug/L U 20uglL U ---- Acetone 20 uglL U 20 ug/L U ---- Ammonia (as N) 0.05 mg/L U 0.05 mg/L ---- Arsenic 5 ug/L U 5 ug/L U ---- Benzene 1uglL U 1uglL U ---- Beryllium 0.5 ug/L U 0.5 ug/L U ---- Cadmium 0.5 ug/L U 0.5 ug/L ---- Carbon Tetrachloride 1 ug/L U 1uglL U ---- Chloride Cmg/L) 1 mg/L 1 mgIL ---- Chloroform 1 ug/L U 1 ug/L U ---- Chloromethane 1 ug/L U 1 ug/L U --- Chromium 25 ug/L U 25 ug/L U --- Cobalt 10 ug/L U 10 ug/L ---- Copper 10 ug/L U 10 ug/L U --- Dichloromethane (Methylene Chloride) 1 ug/L U 1 ug/L U --- Fluoride (Mg/L) 0.1 mg/L 0.1 mg/L ---- Gross Alpha minus Rn & U MDC o pCilL o pCilL ---- Iron 30 uglL U 30 ug/L --- Lead 1 ug/L U 1 ug/L U --- Manganese 10 ug/L U 10 ug/L -- Mercury O.5ug/L U 0.5 uglL U --- Molybdenum 10 ug/L U 10 ug/L U --- Naphthalene 1 ug/L U 1 ug/L U ---- Nickel 20 ugiL U 20uglL ---- Nitrate + Nitrite (as N) 2 mg/L D 0.1 mg/L U --- Selenium 5 ug/L 5 ug/L U ---- Silver 10 ugiL U 10 ug/L U --- Sulfate (mgIL) 10 mg/L D 50 mgIL D --- TDS (mgIL) 10 mg/L 10 mg/L --- Tetrahydrofuran 1 ~g/L 1 ~g/L ---- Thallium 0.5 ug/L U 0.5 uglL U --- Tin 100 ug/L U 100 ug/L U --- Toluene 1 ug/L U 1 ug/L U --- Uranium 0.3 ug/L 0.3 ug/L --- Vanadium 15 ug/L U 15 ugiL U ---,- Xylenes (total) 1 ug/L U 1 ug/L U --- Zinc 10 ug/L U 10 ugiL ---- Bicarbonate as HC03 1 mg/L 1 mg/L ---- Calcium 0.5 mg/L 1 mg/L D --- Carbonate as C03 1 mg/L U 1 mg/L U --- Magnesium 0.5 mg/L 0.5 mg/L -- Potassium 0.5 mg/L 0.5 mg/L -- Sodium 0.6 mglL D 1 mg/L D -- G-5A: Routine Reporting Limit Check MW-34 MW-35 MW-65 Constituent RL Qualifier RL Qualifier RL Qualifier 2-Butanone (MEK) 20 ug/L U 20 ug/L U 20 ugiL U Acetone 20 ug/L U 20 ug/L U 20 ug/L U Ammonia (as N) 0.1 mg/L 0.1 mg/L 0.05 mg/L Arsenic 5 uglL U 5ug/L U 5 ug/L U Benzene 1 ug/L U 1 ug/L U 1 ug/L U Beryllium 0.5 ugiL U 0.5 ugiL U 0.5 ugiL U Cadmium 0.5 ug/L U 0.5 ug/L U 0.5 ug/L Carbon Tetrachloride 1 ug/L U 1uglL U 1uglL U Chloride (mglL) 1 mg/L 1 mg/L 1 mg/L Chloroform 1 ug/L U 1 ug/L U 1 ug/L U Chloromethane 1 ug/L U 1 ug/L U 1uglL U Chromium 25 ug/L U 25 ug/L U 25 ug/L U Cobalt 10 ug/L U 10 ugiL 10 ugiL Copper 10 ug/L U 10 ug/L U 10 ug/L U Dichloromethane (Methylene Chloride) 1 ug/L U 1 ug/L U 1 ug/L U Fluoride (Mg/L) O.l mg/L O.l mglL 0.1 mg/L Gross AJpba minus Rn & U MDC o pCilL o pCi/L o pCi/L Iron 30 ug/L 30 ug!~ 30 ugiL Lead 1 ug/L U 1 ug/L U 1 ug/L U Manganese 10 ug/L 10 ug/L 10 ug/L Mercury 0.5 ug/L U 0.5 ug/L U 0.5 ug/L U Molybdenum 10 ug/L U 10 ugjL U 10 ug/L U Naphthalene 1ug/L U 1 ug/L U 1 ug/L U Nickel 20 ug/L U 20 ug/L 20 ug/L Nitrate + Nitrite (as N) 0.1 mg/L O.l mg/L U 0.1 mglL U Selenium 5 ug/L 5 ug/L U 5 ug/L U Silver 10 ug/L U 10 ug/L U 10 ug/L U Sulfate (mglL) 50 mg/L D 50 mg/L D 50 mg/L D TDS (mg/L) 11 mg/L D 11 mg/L D 10 mg/L Tetrahydrofuran 1 flg/L 1 flg/L 1 !J.g/L Thallium 0.5 ug/L 0.5 ug/L 0.5 ug/L U Tin 100 ug/L U 100 ug/L U 100 ug/L U Toluene 1 ug/L 1 ug/L U lugiL U Uranium 0.3 ug/L 0.3 uglL 0.3 ug/L Vanadium 15 ug/L U 15 ug/L U 15 ug/L U Xylenes (total) 1 ug/L 1 ug/L U 1 ug/L U Zinc 10 ug/L U 10 ug/L 10 ug/L Bicarbonate as RC03 1 mglL 1 mg/L 1 mg/L Calcium 1 mg/L D 1 mg/L D 1 mg/L D Carbonate as C03 1 mg/L U 1 mg/L U 1 mg/L U Magnesium 0.5 mg/L 0.5 mg/L 0.5 mg/L Potassium 0.5 mg/L 0.5 mg/L 0.5 mg/L Sodium 1 mglL D 1 mglL D 1 mg/L D G-5A: Routine Reporting Limit Check MW-70 Constituent RL Qualifier 2-Butanone (MEK) 20 ug/L U Acetone 20 uglL U Ammonia (as N) 0.05 mg/L Arsenic 5 ug/L U Benzene 1 ug/L U Beryllium 0.5 ug/L U Cadmium 0.5 ug/L U Carbon Tetrachloride 1 ug/L U Chloride (mg/L) 1 mglL Chloroform 1 ug/L U Chloromethane lug/L U Chromium 25 ug/L U Cobalt 10 ug/L U Copper 10 uglL U Dichloromethane (Methylene Chloride) 1 ug/L U Fluoride (Mg/L) 0.1 mg/L Gross Alpha minus Rn & U MDC o pCilL Iron 30 ug/L Lead 1 ug/L U Manganese 10 ug/L Mercury 0.5 ug/L U Molybdenum 10 ug/L U Naphthalene 1 ug/L U Nickel 20 uglL U Nitrate + Nitrite (as N) 0.1 mg/L U Selenium 5 ug/L U Silver 10 ug/L U Sulfate (mglL) 50 mg/L D TDS (mg/L) 10 mg/L Tetrahydrofuran 1 /lglL Thallium 0.5 uglL Tin 100 ug/L U Toluene 1 ug/L U Uranium 0.3 ug/L Vanadium 15 ug/L U Xylenes (total) 1 uglL U Zinc 10 ugjL U Bicarbonate as RC03 1 mglL Calcium 1 mg/L D Carbonate as C03 1 mg/L U Magnesium 0.5 mg/L Potassium 0.5 mg/L Sodium 1 mg/L D G-5B· Accelerated Reporting Limit Check MW-ll QAP Reporting Constituent Limit RL Qualifier 2-Butanone (MEK) 20/lg/L ---- Acetone 20/lg/L -- Benzene 1.0 J:1g/L --- Carbon Tetrachloride 1.0 /lg/L -' .. - Chloride (mg/L) 1 mg/L ---- Chloroform 1.0/lg/L -- Chloromethane 1.0/lg/L --- Dichloromethane (Methylene Chloride) 1.0/lg/L --- Field pH (S.u.) 0.01 s.u. -- Manganese 10 /lg/L 10 ug/L -- Naphthalene 1.0 flg/L --- Nitrate + Nitrite (as N) 0.1 mg/L --- Selenium 5/lg/L --- Tetrahydrofuran 1.0 flg/L 1 flg/L Toluene 1.0 flg/L --- Uranium 0.30/lg/L --- Xylenes (total) 1.0 flg/L --- G-5B: Accelerated Reporting Limit Check MW-14 MW-26 Constituent RL Qualifier RL Qualifier 2-Butanone (MEK) ---20 ugiL U Acetone ---20 ugiL U Benzene ----I ug/L U Carbon Tetrachloride ---I ug/L U Chloride (mg/L) ---I mg/L Chloroform --200 ug/L D Chloromethane --lugiL U Dichloromethane (Methylene Chloride) ---I ug/L Field pH (S.u.) ------ Manganese ------ NaQhtbalene ---lugiL U Nitrate + Nitrite (as N) ---0.1 mglL Selenium -------- Tetrahydrofuran ------- Toluene ---I ugiL U Uranium --0.3 ugiL Xylenes (total) --1 ug/L U G-5B: Accelerated Reporting Limit Check MW-30 MW-31 Constituent RL Qualifier RL Qualifier 2-Butanone (MEK) -------- Acetone ------- Benzene ------- Carbon Tetrachloride -------- Chloride (mg/L) ------- Chloroform -------- Chloromethane ----- Dichloromethane (Methylene Chloride) ------ Field pH (S.u.) ------- Manganese ------ Naphthalene ------- Nitrate + Nitrite (as N) 1 mg/L D 1 mg/L D Selenium 5ug/L 0 ---- Tetrahydrofuran ------ Toluene ------ Uranium ----- Xylenes (total) ------ G-SB: Accelerated Reporting Limit Check MW-U MW-14 Constituent RL Qualifier RL Qualifier 2-Butanone (MEK) ----- Acetone ------ Benzene ----- Carbon Tetrachloride ----- Chloride (roglL) ------ Chloroform ------ Chloromethane ------ Dichloromethane (Methylene Chloride) ------ Field pH (S.D.) ------ Manganese 10 ug/L -- Naphthalene ------ Nitrate + Nitrite (as N) ---- Selenium ------ Tetrahydrofuran I )lg/L --- Toluene ------ Uranium ------- Xylenes (total) ------ G-5B: Accelerated Reporting Limit Check MW-26 MW-30 Constituent RL Qualifier RL Qualifier 2-Butanone (MEK) -U -- Acetone --U ---- Benzene -U -- Carbon Tetrachloride --U --- Chloride (mg/L) ----- Chloroform --D ---- Chloromethane -U -- Dichloromethane (Methylene Chloride) ----- Field pH (S.D.) ------ Manganese -- ---- Naphthalene --U --- Nitrate + Nitrite (as N) ---1 mg/L D Selenium ---5 ug/L 0 Tetrahydrofuran --- --- Toluene .-U --- Uranium ----- Xylenes (total) --U --- G-SB: Accelerated Reporting Limit Check MW-31 Constituent RL Qualifier 2-Butanone (MEK) ---- Acetone ---- Benzene ---- Carbon Tetrachloride --- Chloride (mglL) --- Chloroform --- Chloromethane --- Dichloromethane (Methylene Chloride) ---- Field pH (S.U.) --- Manganese ---- Naphthalene -- Nitrate + Nitrite (as N) 2 mg/L D Selenium ---- Tetrahydrofuran -- Toluene -- Uraniwn --- Xylenes (total) -~ G-6A: Trip Bl.ank Evaluation AU trip blanks for the 2010 Fourth Quarter samples were non detect. Blank Sample Date Laboratory 1 11 /9/2010 American West Analytical Laboratorie~ 2. ] 111 112010 American West AnalyticaJ Laboratories 3 J 1/15/2010 American West Analytical Laboratories 4 11118/20 I 0 American West Analytical Laboratori~ 5 11/2212010 American West Analytical Laboratories 6 11126/2010 American West Analytical Laboratories 7 12/112010 American West Analytical Laboratories 8 11110/2010 Energy Laboratories 9 11 /12/2010 Energy Laboratories 10 11 /17/2010 Energy Laboratories 11 11/18/2010 Energi' Laboratories 12 11/22/2010 Energy Laboratories 13 11/2912010 Energy Laboratories 14 12/1i20 10 Energy Laboratories G-6B: Trip Blank Evaluation All trip blanks for the Accelerated 20 I 0 Second Quarter samples were non detect. Blank Sample Date Laboratory 1 Energy Laboratories 2 American West Analytical Laboratories 3 Energy Laboratori es 4 American West Analytical Laboratories G-7 A: QAJQC Evaluation for Routine Sample Duplicates Constituent MW-32 MW-65 %RPD Ammonia (as N) 1.04 1.01 2.93 Nitrate + Nitrite (as N) 0 0 0.00 Arsenic 0 0 0.00 Beryllium 0 0 0.00 Cadmium 0.78 0.81 3.77 Chromium 0 0 0.00 Cobalt 46 38 19.05 Copper 0 0 0.00 Iron 6200 6190 0.16 Lead 0 0 0.00 Manganese 5090 4760 6.70 Mercury 0 0 0.00 Molybdenum 0 0 0.00 Nickel 49 48 2.06 Selenium 0 0 0.00 Silver 0 0 0.00 Thallium 0 0 0.00 Tin 0 0 0.00 Uranium 2.11 2.05 2.88 Vanadium 0 0 0.00 Zinc 81 76 6.37 2-Butanone (MEK) 0 0 0.00 Acetone 0 0 0.00 Benzene 0 0 0.00 Carbon Tetrachloride 0 0 0.00 Chloroform 0 0 0.00 Chloromethane 0 0 0.00 Dichloromethane (Methylene Chloride) 0 0 0.00 Naphthalene 0 0 0.00 Tetrahydrofuran 1 1 0.00 Toluene 0 0 0.00 Xylenes (total) 0 0 0.00 Chloride (mg/L) 35 31 12.12 Fluoride (Mg/L) 0.19 0.18 5Al Lab pH (S.u.) 7.23 7.22 0.14 Sulfate (mg/L) 2330 2410 3.38 Radiologic Duplicate Tests Gross Alpha minus Rn & U MDC 0.1 0.1 0.00 Gross Alpha minus Rn & U* lA lA 0.000 Gross Alpha minus Rn & U Precision (±) 0.1 0.1 * Duplicate checks rep0rted for gross alpha Illinus RN and U are not %RPD. Calculated values are based on the formula in the approved QAP. G-7 A: QAJQC Evaluation for Routine Sample Duplicates Constituent MW-18 MW-70 %RPD Ammonia (as N) 0.09 0.09 0.00 Nitrate + Nitrite (as N) 0 0 0.00 Arsenic 0 0 0.00 Beryllium 0 0 0.00 Cadmium 0 0 0.00 Chromium 0 0 0.00 Cobalt 0 0 0.00 Copper 0 0 0.00 Iron 94 118 22.64 Lead 0 0 0.00 Manganese 70 68 2.90 Mercury 0 0 0.00 M0lybdenum 0 0 0.00 Nickel 0 0 0.00 Selenium 0 0 0.00 Silver 0 0 0.00 Thallium 3.57 3.63 1.67 Tin 0 0 0.00 Uranium 42.7 43.4 1.63 Vanadium 0 0 0.00 Zinc 0 0 0.00 2-Butanone (MEK) 0 0 0.00 Acetone 0 0 0.00 Benzene 0 0 0.00 Carbon Tetrachloride 0 0 0.00 Chloroform 0 0 0.00 Chloromethane 0 0 0.00 Dichloromethane (Methylene Chloride) 0 0 0.00 Naphthalene 0 0 0.00 Tetrahydrofuran 1 1 0.00 Chloride (mgfL) 52 53 1.90 Fluoride (MglL) 0.22 0.22 0.00 Lab pH (S.U.) 7.87 7.88 0.13 Sulfate (mgIL) 1910 1950 2.07 Radiologic Du~licate Tests Gross Alpha minus Rn & U MDC 0.8 0.8 0.00 Gross Alpha minus Rn & U* 1.2 0.7 0.54 Gross Alpba minus Rn & U Precision (±) 0.7 0.6 * Duphcate checks reported for gross alpha mlllUS RN and U are not %RPD. Calculated values are based on the formula in the approved QAP. G· 7B: QAlQC Evaluation for Accelerated Sample Duplicates MW-26 MW-65 Constituent (611612010) (611612010) %RPD Nitrate + Nitrile (as N1 OA OA 0.00 Uranium 29.6 30.8 1.88 Chlorofonn 1400 1300 7.4 1 Dichloromethane (Methylene Chloride) 1.2 NA NC Chloride (mgIL) 52 51 1.94 F;cld oH (S.U.) 6.36 6.98 9.30 Lab pH S.U. 7.82 7.92 1.27 G-'m'~; QNQC Evaluation for AQ~elerated Sample Duplicates! MW-26 MW-65 Constituent (10/20/20 I 0) (10/20/2010) %RPD Nitrate + Nitrite (as N) 6.4 10;4 0.00 Uranium 37.5 36.7 0.707 Chlorofonn 1000 ~ 29.89 Dichloromethane (Methylene Chloride) 5.5 5.6 1.80 Chloride (rugIL) 52 -~:~ 31.11 Field p_H (S .U.) 6.36 6.98 9.30 Lab pH (S.U.) 7.82 7.92 1.27 G-8: Radiologies Counting Error Gross Alpha Counting Gross Alpha minusRn&U Error ::s Well SampieDate minusRn&U Precision (:I::) 20% MW-1 11 /1812010 0.7 0.6 N MW-2 11117/2010 0.7 0.1 Y MW-3 11119/2010 0.4 0.6 N MW-3A 11 /22/2010 1.7 0.8 N MW-4 11 /1512010 0.2 0.08 N MW-5 11/1112010 0.3 0.08 N MW-ll 11 /1112010 0.2 0.08 N MW-12 1111912010 0.5 0.6 N MW-14 11110/2010 0.3 0.09 N MW-15 1111112010 0.05 0.07 N MW-17 11117/2010 0.4 0.09 N MW-18 11 /18/2010 1.1 0.7 N MW-19 11 /18/2010 1.2 0.7 N MW-20 11122/2010 2.8 1 N MW-22 11116/2010 2.2 0.2 Y MW-23 11122/2010 1.8 0.9 N MW-24 11117/2010 0.1 0.07 N MW-25 1111012010 0.7 0.1 Y MW-26 11115/2010 2.2 0.2 Y MW-27 1111212010 1 0.1 Y MW-28 1111212010 0.6 0.1 Y MW-29 1119/2010 0.7 0.1 Y MW-30 111912010 0.2 0.08 N MW-31 111912010 0.4 0.09 N MW-32 11110/2010 1.4 0.1 Y MW-33 Dry Dry Dry Dry MW-34 11129/2010 1.5 0.8 N MW-34R 11126/2010 1.5 0.8 N MW-35 12/112010 2.6 0.2 Y MW-65 1111012010 1.4 0.1 Y MW-70 11118/2010 0.7 0.6 N Groundwater concentration levels have not been established for MW-20 and MW-22. MW -60 is a DI Blank. Within GWCL GWCL? 3.75 Y 3.2 Y 1 Y 7.5 Y NA 3.75 Y 3.75 Y 7.5 Y 7.5 Y 7.5 Y 2.8 Y 7.5 Y 2.36 Y NA NA 2.86 Y 7.5 Y 7.5 Y 4.69 Y 2 Y 2.42 Y 2 Y 3.75 Y 7.5 Y 3.33 Y Dry Dry NA NA NA NA NA G-9A: Laboratory Matrix QC M t' S 'k 0;' R C a nx ;pl e 0 ecovery ompanson MSD Lab Report Well Analyte MS%REC %REC RECRange RPD 1011479 MW-20 THF 99.8 127 43 -146 23.7 MW -65 (Dup of C10110505 MW-32) Sulfate 86 88 90 -110 0.6 C10110505 MW-15 Thallium 68 71 70 -130 4.8 C10110505 NA Chloromethane 159 164 70 -130 2.7 CI0110505 NA Acetone 128 134 70 -130 4.3 C10110505 NA Chloromethane 60 64 70 -130 5.8 CIOl10584 NA Chloromethane 152 177 70 -130 15 C10110584 NA Carbon tetrachloride 118 139 70 -130 16 C10110584 NA Chloroform 96 131 70 -130 15 C10110584 NA Acetone 170 152 70 -130 11 C10110584 NA MEK 144 138 70 -130 4 CIOl10730 NA Chloromethane 152 177 70 -130 15 CIOl10730 NA Carbon tetrachloride 118 139 70 -130 16 CIOII0730 NA Chloroform 96 131 70 -130 15 ClOl10844 MW-20 Mercury 35 26 70 -130 20 CIOII0844 MW-20 Silver 46 44 70 -130 4.9 CIOII0844 MW-20 Tin 65 73 70 -130 12 CIOl10870 MW-34 Silver 56 56 70 -130 0.2 CIOII0928 MW-20 Silver 46 44 70 -130 4.9 C10120105 NA MEK 126 132 70 -130 4.3 C10120105 NA Acetone 134 139 70 -130 3.5 NA = MS samples were not Demson samples. Lab Control Sample % Recovery Lab Report Analyte LCS%REC RECRange ClOII0584 Chloromethane 157 70 -130 CIOII0584 MEK 138 70 -130 CIOl10584 Acetone 150 70 -130 CIOl10730 Chloromethane 157 70 -130 Surrogate % Recovel'Y Lab Specified Surrogate REC QAP Required Lab Report Well/Sample Analyte %REC Range Range C10110584 MW-15 Dibromofluoromethane 132 70 -130 None CIOI10584 MW-27 Dibromofluoromethane 134 70 -130 None CIOII0584 MW-28 Dibromofluoromethane 150 70 -130 None Method Blank detections G-9A: Laboratory Matrix QC QAP Reported Required Lab Report Well/Sample Analyte Concentration RL CIOl10505 NA Molybdenum 0.06 ugiL 10 ugiL CIOIIOSOS NA Tin 0.2 uglL 100 ugiL CIOIIOSOS NA Zinc 3 ug/L 10 ugiL ClOllOS84 NA Bicarbonate as RC03 3.66 mg/L 1.0 mglL ClOllOS84 NA Tron 3.0 ug/L 30 uglL ClOllOS84 NA Molybdenum 0.06 ug/L 10 ug/L CIOIlOS84 NA Tin 0.2 ug/L 100 ug/L CIOIIOS84 NA Zinc 3 ug/L 10 ug/L ClOlI0730 NA Bicarbonate as RC03 4.8S mg/L 1.0 mglL ClOl10730 NA Thallium 0.03 ug/L O.S ug/L CIOlI0730 NA Mercury O.OS ug/L 0.5 ug/L CIOIl0730 NA Tin 0.5 ug/L 100 ugiL CIOll0730 NA Zinc S ug/L 10 ug/L CIOII0844 NA Manganese 0.07 ug/L 10ug/L CIOIl0844 NA Tin O.S ug/L 100 ug/L ClOlI0844 NA Uranium 0.04 ug/L 0.3 ug/L CIOII0844 NA Zinc Sug/L 10 ug/L CIOl10844 NA Cobalt 1.S3 ug/L 10 ug/L CIOII0844 NA Zinc 1.18 ug/L 10 ug/L ClOl10870 NA Zinc 1.18 ug/L 10 ug/L CIOII0928 NA Sulfate 1.0 mg/L 1.0 mg/L CI0l10928 NA Nickel 0.1 ug/L 20 ugiL CI0120l0S NA Sulfate 1.0 mg/L 1.0 mgfL CI012010S NA Arsenic 1.0 ug/L S.O ugIL CI012010S NA Manganese 0.2 ug/L 10 ugiL CI0l20lOS NA Selenium 0.8 ug/L S.O ugIL CI0120l0S NA Thallium 0.03 ug/L O.S ugiL CI0120105 NA Zinc 0.6 ug/L 10 uglL G-96: Accelerated Laharal ry Matrix. QC Matrix Spike % Recovery Comparison Lab Report Well Analyte MS %REC MSJ)%REC RECRsnge RPD% CIOI0941 -October Accelerated MW-26 Chlorofonn 123 134 70 -130 5.8 C1010941 -October Accelerated MW-26 Chloromethane 140 146 70 -130 4.5 MW-65 (Dup C I 0 I 0941 -October Accelerated of MW-26) Chlor(JtOlm 171 \67 70 -J30 1.6 LCS%RE 159 Metbod Blank Detections Reported QAP Required L~bRcport Wtll/Sample Analyte Concentration RL C 10 II 0941 -October Accelerated NA Mnngllllesc 0.05 ugIL 10 ug/L_ C I 0 12064 1 -December Accclcrnlcd NA Selenium 0.2 ugIL 5.0 uglL CI0120641 • DcccmbcrAccclcrnicd NA MillIg:mese 0.05 uglL lO u~ G·lO Rinsate Blank Detec tions Rinsate Blank Analvte Concentration Units Sample Concentration Units MW-34R Bicarbonate as HCOJ 5 mg/L MW·34 355 mgtL MW·34R Ammon ia 0.06 mg MW-34 0.15 m MW-34R Nitrate 0.1 m MW-34 0.3 m MW-34R Sulfate 2 B mg MW·34 2280 mg B Flag IS appbed by the laboratory to mdlcate that the analyte was also detected 10 the method blanks TabH Kriged Current Quarterly Groundwater Contour Map and Depth Data fi f{ Il ~~ #~ I!. # I, " II II // \ ~~. I, ~'I 11 o MW-22 .5450 ~ =::::t- I' jl ,I ,I :1 32 I' II II II JlJ • II II I' ·21 \\ II II \\ ~ ~ N l ~ ~ SCALE IN FEET EXPLANATION perched monitoring well showing elevation in feet amsl ~ PROPERTY BOUNDARY ~ MW·20 $.teO e5457 ~ ~ ~.... --=--=--=--~-~, 3000 MW'()l e5582 MW·18 es587 TWN·ll TWN-1i', . 0561~ 056~ !Jj~O ' ~586 TWN·l0 ~ N-4 ~584 TWN·9 P~ "5594 ~:J PiEz " 12 ::w:: __ /.:IF-----hi? ---- ~? ______ ----55 ~ ~~-=--=--::::..-=--=--=---~----~ ---=--=- 8.,6'0 MW·22 "- e5450 "" II // // // // // // // // // // 0 5555 PIEZ-1 " 5594 TWN-4 ~5604 temporary perched monitoring well showing elevation in feet amsl perched piezometer showing elevation in feet amsl NOTE: MW·4, MW-26, TW4-4, TW4-19 and TW4-20 are pumping wells TW4-26 ~5537 temporary perched nitrate monitoring well showing elevation in feet amsl KRIGED 4th QUARTER, 2010 WATER lEVELS WHITE MESA SITE ~ \ c ( ~ \. MW-34 -9-5492 temporary perched monitoring well installed May, 2010 showing elevation in feet amsl perched monitoring well installed August/September, 2010 HYDRO GEO CHE~INC. APPROVED DATE REFERENCE FIGURE showinc elevation in feet amsl SJS H:/718000/feb11/wI1210.srf Tab I Groundwater Time Concentration Plots :J ...... 110 .§. OJ "C '0: 0 :;: u :J "Oi; .§. OJ :E 0 :::I ii: Time concentration plots for MW-1 Chloride in MW-l 25 20 15 10 5 t---------------------------------------------------------I o 0.6 0.5 0.4 0.3 0.2 0.1 Sample Date Fluoride in MW-l Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • Detected Values Non-Detected Values ::;- 'Iia .§. III ... J!! ~ III Time concentration plots for MW-1 Sulfate in MW-l 900 800 700 600 500 400 300 200 100 a <i' .... "'<' Sample Date Uranium in MW-l 12 10 8 .,~t----------------------------------------------------I 4 2 Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • Detected Values Non-Detected Values ::l" a:a E. CII :!:! 5 :c u ::l" a:a E. CII :!:! 5 :::I u:: Time concentration plots for MW-2 Chloride in MW-2 25 20 t1t-------------------------------------------------------~ 15 10 5 o 0.5 0.45 0.4 0.35 0.3 I ~ \ I' 0.25 0.2 0.15 0.1 0.05 0 cP"o, Sample Date Fluoride in MW-2 11 / AI Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 lJ A.a. J ~ V • • Detected Values Non-Detected values -::i' 'b! .§. GI .... .l!! :; III -::i' ........ ~ E ::> 'c ~ ::J Time concentration plots for MW-2 Sulfate in MW-2 2500 2000 1500 1000 sao a +---~~--~----~----~----~--~-----r----~--~ 20 18 16 14 12 ~ 10 8 6 4 2 )\ If \ ~ 0 r:f1'1o, Sample Date Uranium in MW-2 l t , I \ ~ , / \/ V Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 ~ '"\.X \J • • .... Detected Values Non-Detected Values 80 70 60 -::; 50 bD .s (II 40 "1:1 .~ ::c u 30 20 10 0 ~rf> )~ 1.2 0.8 -::; bD .s (II 0.6 "1:1 '1: 0 ::J u:: 0.4 0.2 -'& ME Ini:i:=t~ ~ p,-!!!!! ,..';b'" ~o l .1- ~ Time concentration plots for MW-3 ,,<C- 'f'q Chloride in MW-3 .:§Ocf' ~ Sample Date Fluoride in MW-3 ~ Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 ~, • \F -.- • • • ~ Detected Values Non-Detected values ::J' "ba .§. III .. of! :; '" ::J' } E " ·c OJ .. ::I 4500 4000 3500 3000 2500 2000 1500 1000 500 0 l&> .... 'I>~ 80 70 60 50 40 30 20 10 0 (f'\o, 0 Time concentration plots for MW-3 Sulfate in MW-3 Sample Date Uranium in MW-3 Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • Detected Values Non-Detected Values ::;-~ §. CII "C '1: 0 :c u ::;- ~ §. CII :2 ~ ::> u: Time concentration plots for MW-3A Chloride in MW-3A 80 70 ~ 1\ .-~ 60 "'" V ~/ 50 40 30 20 10 o 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 ~., \~<;' ~ ,<If' ~ ,>,l~ ... Sample Date Fluoride in MW-3A r$o ,.~ r$o ~o"" Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • ;;;;;;iI Detected Values Non-Detected Values 3800 3700 :::;- Cia 3600 .5-cu ... .l!! 3500 :i III 3400 3300 40 35 30 :::;-25 -bII .=: E 20 :::I ';: .. ... :l 15 10 5 o Time concentration plots for MW-3A Sulfate in MW-3A Sample Date Uranium in MW-3A !"-. / "----'" ~ -.. Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • Detected Values Non-Detected Values 80 70 60 ~ 50 Iio .§. cu 40 "'C .~ :i: u 30 20 10 0 ,lJ !lJ'? c: ~'b 0 1.8 1.6 1.4 1.2 ~ Iio 1 .§. cu 3! 0 0.8 :::I u:: 0.6 tt 0.4 0.2 o Time concentration plots for MW-5 Chloride in MW-S ~ '<~ Sample Date Fluoride in MW-S .It / --h Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 ~ .., .~ • • Detected Values Non-Detected values :J' "Oa E. III ... .l!! :; II'> Time concentration plots for MW-5 Sulfate in MW-S 1600 1400 1200 1000 800 600 400 200 0 !:) l'> " ,K'IJ rJf'b ",d ~'O Sample Date Uranium in MW-S 8 7 6 2 t-----t-------~----~~~~----~--------------------I o Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • Detected Values Non-Oetected Values 45 40 35 30 :::r Iia 25 .§. QI :E ~ 20 :i: u 15 10 5 0 !O'" ~ <:;)'1; 1.2 0.8 :::r Iia .§. QI 0.6 :E ~ :::I ;:;: 0.4 0.2 o !Oro § .... ,,; Time concentration plots for MW-11 !OOJ '<~ Chloride in MW-ll Sample Date Fluoride in MW-ll Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 ~ AI I~"~ • • Detected Values Non-Detected Values Time concentration plots for MW-11 Sulfate in MW-ll 1400 1200 1000 :::;- Iia 800 .§. GI .. ~ 600 :J 11\ 400 200 Sample Date Uranium in MW-ll 8 7 6 t---------------------------------------------------------I :::;-5 +--------------------------------------------------------------1 ~ § 4 t-------------------------------------------------------~ 'c ~ ::l 3 2 Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • Detected Values Non-Detected Values 90 80 70 60 :. OA 50 .§. .. "0 .;: 40 0 :;: u 30 20 10 0 !C> ~'I>~ 2.5 2 :. 1.5 OA .§. .. !! l5 :::I 1 ;:;: 0.5 !o r:\:'lJ ~'I> Time concentration plots for MW-12 '1>0) ($ ... ~ Chloride in MW-12 Sample Date Fluoride in MW-12 ~ Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 ...... .-. r--.... • • Detected Values Non-Detected Values ::; ....... ... .§. .. ... ra -:; I/) ::; ....... ... .= E ::I 'c ~ ;:) 3000 2500 2000 1500 1000 500 15 10 Time concentration plots for MW-12 Sulfate in MW-12 Sample Date Uranium in MW-12 Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • Detected Values Non-Detected Values ::; 'b:o .s til "tJ 'I: Q :c u ::; 'b:o .s til "tJ ';: Q ::J i:i: 30 2S 20 15 10 S o 0.25 0.2 0.15 0.1 0.05 o Time concentration plots for MW-14 Chloride in MW-14 Sample Date Fluoride in MW-14 Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • Detected Values Non-Detected values ::r -.. .§. ~ ~ :::J \II ::r -~ E :::J 'c l! ::::) 2500 2000 1500 1000 500 o 120 100 80 60 40 20 Time concentration plots for MW-14 Sulfate in MW-14 Sample Date Uranium in MW-14 Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • Detected Values Non-Detected Values 60 50 40 ::; -tIO .§. \1/ 30 :2 ~ ::c u 20 10 2.5 2 ::; 1.5 Go .§. \1/ :2 ~ ::s 1 u: 0.5 o Time concentration plots for MW·15 Chloride in MW-1S Sample Date Fluoride in MW-1S ~ Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • Detected Values Non-Detected Values :::. "oa .§. III .. J!! "5 III :::. 'bo ..= E ::J "2 ~ ~ Time concentration plots for MW-15 Sulfate in MW-1S 3000 2500 2000 1500 1000 500 a +-----~----r----,----~----~----~----,_----~--~ 70 60 50 30 20 10 0 ~'bo, 0 ~?J'" ~'Ij ~~ ..,<1$ Sample Date Uranium in MW-1S ~ ~r;f' ~OJ 0 ~'Ij Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • Detected Values Non-Detected Values :::a -tID .§. CII :E ~ ::2 u :::a iii; .§. CII :E ~ :::J u: Time concentration plots for MW-17 Chloride in MW-17 60 50 40 30 20 10 o +---------~--------~--------~--------~--------~--------~--------_r--------_r--------~ 2.5 2 1.5 1 0.5 .... Sample Date Fluoride in MW-17 -"' Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 ~ • • Detected Values Non-Detected values 3500 3000 2500 ::; ....... 2000 .., .§. CLI .... .l!! 1500 :; ." 1000 SOD o 50 45 40 35 ::; 30 ....... ~ E 25 ::J 'c ~ 20 :::l 15 10 5 a "","> ~~ "",'? ~~ Time concentration plots for MW-17 "",,,- ~'Ii Sulfate in MW-17 Sample Date Uranium in MW-17 ~ '<~ Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • Detected Values Non-Detected Values 80 70 60 ::; 50 -tID oS GI 40 :E ~ :c u 30 20 10 0 !:OJ'" ~'II !:OJ'" ~'II 0.5 - 0.45 0.4 0.35 ~ ::; 0.3 tiD oS GI 0.25 :E ~ :::I 0.2 ;:;: 0.15 0.1 0.05 o Time concentration plots for MW-18 .;. '<~ '\. Chloride in MW-18 ~ '<~ Sample Date Fluoride in MW-18 .-'"'1 ~ \ .... \ j' .... Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 '.... --.-... 'Y • • ~ Detected Values Non-Detected Values ~ b:a .§. OJ .... .j!! :; on ~ ....... I>D ~ E ::J 'c f! :::J 1500 1000 60 50 40 30 20 10 a Time concentration plots for MW-18 Sulfate in MW-18 Sample Date Uranium in MW-18 Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • Detected Values Non-Oetected Values 120 100 80 ::;--.:a .s .. 60 "'C 'I: 0 :c u 40 20 1.6 1.4 1.2 ::;-1 -.:a .s .. 0.8 "'C 'I: 0 :::I u: 0.6 0.4 0.2 a ",,<fJ ~'Ii s:P 'r'~" Time concentration plots for MW-19 ~'\. ~ <;f' Chloride in MW-19 Sample Date Fluoride in MW-19 1:<::J'" ~,. Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • Detected Values Non-Detected Values ::;- b:a .§. G/ .. ~ "5 II> ::;- b:a .=: E :::J 'c .. .... :J Time concentration plots for MW-19 Sulfate in MW-19 2000 1500 1000 500 Sample Date Uranium in MW-19 30 r-------------------------------------------------------~ 25 15 10 5 a Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • Detected Values Non-Oetected Values 80 70 60 :J' 50 "-l1li .§. /II 40 "a .;: 0 :i: u 30 20 10 0 C:,.,. <!' 0.4 0.35 0.3 :J' 0.25 "ba ~ .§. /II 0.2 :2 ~ ::J ii: 0.15 0.1 0.05 o Time concentration plots for MW-20 Chloride in MW-20 ~ ~.Jj> Jf' ~'), ~"> r.,,,,<l ,.;; 'r'''I ,,,,<:> &' Sample Date Fluoride in MW-20 /' ~ Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 -JI" ./' • • Detected Values Non-Detected values 4500 4000 3500 3000 ::;-o:a 2500 .§. OJ .... ~ 2000 "5 III 1500 1000 500 a 40 35 30 ::;-25 o:a .= E 20 :J 'c I!! :::l 15 10 5 a IJ~ ~ Q'" c,"'<:( Time concentration plots for MW-20 ~",'b ,,~ Sulfate in MW-20 ....-~ --..- Sample Date Uranium in MW-20 JS' ~'\, 'il'" or<:/. ,,'I) 0(;' Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 "-- • • Detected Values Non-Detected Values 80 70 60 ::; 50 ...... ....... QD .§. CII 40 "'C .~ :c u 30 20 10 0 l' <;JJ 3.5 3 ,..... 2.5 ::; ...... QD 2 .§. CII "'C 'C 0 1.5 :::I u:: 1 0.5 o ,l' <§i Time concentration plots for MW-22 ~",'b .... <1$ ~ Chloride in MW-22 Jf' .".q Sample Date Fluoride in MW-22 ...... /----~ ,7 .... Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 ..... • • Detected Values Non-Detected values 7000 6000 5000 ::i' "ba 4000 .§. Q.I ... .j!! 3000 :; III 2000 1000 o 60 50 40 ::i' ..... ~ E 30 ::J ·c f :::J 20 10 Time concentration plots for MW-22 Sulfate in MW-22 ~--- Sample Date Uranium in MW-22 Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 ~ ........... ...... • • ... Detected Values Non-Oetected values :::;-...... boD .§. GI 3! ~ :;: u Time concentration plots for MW-23 Chloride in MW-23 12 10 8 6 4 2 o ~--------~--------~------~------,---------~------~--------~----~--------~ 2.5 2 0.5 a Sample Date Fluoride in MW-23 ~ ~ Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • Detected Values Non-Detected values 3000 2500 2000 :::J' "iia .§. 1500 CII .. ~ :::I VI 1000 500 35 30 25 :::J' ... 20 ..:; E :::I C 15 E ::J 10 5 0 b c,fl,<f ~S'!' ~~ Time concentration plots for MW-23 ,l' ~o Sulfate in MW-23 Sample Date Uranium in MW-23 !' .... oS Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • Detected Values Non-Detected values 80 70 60 ::; 50 "ba E. " --...... GI 40 :E ~ :c u 30 20 10 o 0.4 0.35 0.3 ::; 0.25 "ba E. GI 0.2 :E ~ :::I u::: 0.15 0.1 0.05 0 $)" ... ~<' '<~ Time concentration plots for MW-24 s§> ",q Chloride in MW-24 ..... ... ~ '" ./ ... Sample Date Fluoride in MW-24 ~ ,i' ~~ ~o Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 ~ • • Detected Values Non-Oetected Values 3500 3000 2500 ~ 'ba 2000 .5- AI .... .J!! 1500 ~ III 1000 500 14 12 10 ... ~ liD 8 .=: E :3 ·c 6 "' ... :::> 4 2 0 Time concentration plots for MW-24 Sulfate in MW-24 Sample Date Uranium in MW-24 A \ '\ , " ... 'w' "-. .... ~ -- Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 ~ - , I \ -..- • • Detected Values Non-Detected values 40 35 ~ 30 ::;-25 .... 1>11 .§. 41 20 "a '1: 0 :c u 15 10 5 o 0.45 0.4 0.35 0.3 ::;- bD 0.25 .§. 41 "a '1: 0.2 0 :::I ;:;: 0.15 0.1 0.05 0 !:)" § ..,0$ Time concentration plots for MW-25 Chloride in MW-2S ---..... ----v ..... ~ .-.... ~ ~ <<,If .,eq V Sample Date Fluoride in MW-2S !:~ ~ ~o'" 't-q Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 A • • Detected Values Non-Detected values Time concentration plots for MW-25 Sulfate in MW-2S 2500 2000 ::;- liD 1500 .§. III .... J!! "5 1000 11\ 500 t------------------------------l o Sample Date Uranium in MW-2S 7 r-------------------------------------------------~ 5 t-----------------------------------------------------I i 4 t---------------------------------------------------I E :J .~ 3 ~ 2 t-----------------------------------------------------~ 1 t-------------------------------------------------~ o +-----~----~----~----~----r_--____ r_--~----~----~ Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • Detected Values Non-Detected Values 80 70 60 ~ 50 o:a .§. III 40 ~ ~ is 30 20 10 0 .,,,,.?" 2.5 2 ~ 1.5 o:a .§. III "C .~ :l 1 Ii: 0.5 o "i" Time concentration plots for MW·26 Chloride in MW-26 Sample Date Fluoride in MW-26 ..... -. ....... 'W" --- Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 -------- • • ~ Detected Values Non-Detected Values -.::7 "bo E. cu .... .J!! :i III -.::7 ...... 2: E :I "c E :::> Time concentration plots for MW-26 Sulfate in MW-26 2500 2000 1500 1000 500 o +---~~--~----~----~----~--~----~----~--~ 140 120 100 80 40 20 0 })" 'i:>~ s§o ~",~ Sample Date Uranium in MW-26 ~ ~f:J'b ,</' Sl~ '?' ~'Ii Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • Detected Values Non-Detected Values 50 45 40 35 ::i' 30 ..... 00 .§. ell 25 :2 5 :c u 20 15 10 5 o 0.9 0.8 0.7 0.6 ::i' 'bD 0.5 .§. ell :2 5 0.4 :::I u:: 0.3 0.2 0.1 o Time concentration plots for MW-27 Chloride in MW-27 -~ I ,..... -. ~ -.. Sample Date Fluoride in MW-27 .. A~ V"' --.. Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 ~ -I V ............... ""-= ... # • • 7 Detected Values Non-Detected Values ~ Cia .§. III .... .l!! "5 III ~ ...... ~ E ::J 'c ~ ::J Time concentration plots for MW-27 Sulfate in MW-27 600 1"------------------------------, 500 400 300 200 100 o 40 35 A ..... 30 25 20 15 10 5 0 ~<, .... <>'" Sample Date Uranium in MW-27 ~~ ..... Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 A ..... ~ • • Detected Values Non-Detected Values :zm E IntiC=tA ::J "-OIl ..s ell "C .;: 0 :c u ::J 'bo ..s ell :E ~ :::I ;:;: Time concentration plots for MW-28 Chloride in MW-28 120 100 80 60 40 20 o +-----~----~----~----~----~~----r_----~----~----~ 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 ~" ..,.;:,<' ~ ..,'b<' </,1' Sample Date Fluoride in MW-28 i' ~ 'r'q ~o~ Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • Detected Values Non-Detected Values :::l' ~ .§. CII ... ~ ::J III Time concentration plots for MW-28 Sulfate in MW-28 2600 2550 2500 2450 2400 2350 2300 2250 2200 2150 f> !' ,? ~ Sl'b .,.l .,.q ~o ,~<;< ,,.<;< ,l' ~o Sample Date Uranium in MW-28 6 5 4 t---------~~------------------------------------------------------------------I 2 1 o Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 ,l' ~o • • Detected Values Non-Detected Values 45 40 35 30 ::; lib .s 25 cu :E ~ 20 6 15 10 5 o 1.2 0.8 ::; lib .s cu 0.6 :E ~ :::I i:i: 0.4 0.2 Time concentration plots for MW-29 Chloride in MW-29 A. -V "--.I ----~ / '--=-/ Sample Date Fluoride in MW-29 o +---------~--------~--------~--------,---------~--------~--------~--------~--------~ Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • Detected Values Non-Detected values 3000 2950 2900 ::i' 'ba 2850 .§. CII ... J!! 2800 :; VI 2750 2700 16 14 12 ::i' 10 'ba .=: E 8 ::I '2 I! :J 6 4 2 a Time concentration plots for MW-29 Sulfate in MW-29 Sample Date Uranium in MW-29 -'" /\, '" .... "'--...- V ~ Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 ~ ~ ~ • • Detected Values Non-Detected values ::;-.... 01) ..s CII "CJ .;: 0 :E u ::;- "Ga ..s CII :E 5 ::I ii: Time concentration plots for MW-30 Chloride in MW-30 140 120 100 ........ ~ ~ A 1 ,......-----.,.,. ........ .... ,. ---.........." ., ~\/ ". so 60 40 20 o Sample Date Fluoride in MW-30 0.6 0.5 0.4 0.3 0.2 0.1 o +-----~----~----~----~----~~----~----~----~----~ Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • Detected Values Non-Oetected Values ::7 'bD .§. CLI .. .. ~ ::I VI Time concentration plots for MW-30 Sulfate in MW-30 1200 1000 800 I'v-~ ...... ~ ~ ----.... ...... ~ ~ 600 400 200 a Sample Date Uranium in MW-30 9 AI'\...... .-&. 8 / V ~ ~ ... ~ -..... 7 6 I 3 2 1 o Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 ~ -- • • ~ Detected Values Non-Detected Values 160 140 120 ::;-100 -til) .§. GI 80 "'C '1: 0 ~ u 60 40 20 o 2.5 2 .... .... ...... 0.5 o Time concentration plots for MW-31 Chloride in MW-31 ~ ---~ ..... ..... ..... ~ Sample Date Fluoride in MW-31 "---..... -.- Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 ~ -. .- • • Detected Values Non-Detected Values 600 500 .. rv~ 400 ::. tia oS 300 QI ... J!! :; III 200 100 a 10 9 8 7 ,./ V ::. 6 tia .=: E 5 ::J 'c III ... 4 :> 3 2 a Time concentration plots for MW-31 - Sulfate in MW-31 ... ~ --A .... --w ~ Sample Date Uranium in MW-31 .,., ~ ... "../ Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 .,... .-'" -. ~ ~ • • -, Detected Values Non-Detected Values 40 35 30 ::; 25 "bD E. cu 20 :E ~ :c u 15 10 5 0 c.,e<f'" 2.5 2 ::; 1.5 "bD E. cu :E ~ :::J 1 u:: 0.5 o f:J"> 't-»IID Time concentration plots for MW-32 Chloride in MW-32 Sample Date Fluoride in MW-32 ---~ --we ... Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 - • • Detected Values Non-Detected values :i Cia .§. GI ... ns ~ :I 11\ Time concentration plots for MW-32 Sulfate in MW-32 3000 2500 2000 .... ~ ..... ....... ~r---... ,....... • 1500 1000 500 o Sample Date Uranium in MW-32 6 5 4 t---------A.----------~~----------------------------I 2 1 t------------------------------------------------------J o Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • Detected Values Non-Detected values Time concentration plots for MW-33 Chloride in MW-33 100 ,-----------------------------------------------------~ ~ t-------------------------------------------------------~ 60 +-----------------------------------------------------~ Insufficient water for sampling 40 +-------------------------------------------------------~ 20 t-------------------------------------------------------~ o +---------------~----------------~--------------~----~ Sample Date Fluoride in MW-33 1 .-------------------------------------------------------~ 0.8 +--------------------------------------------------------1 ::J" "iii; 0.6 1--------------------------------------------------------1 .§. CII 'C Insufficient water for sampling .~ if 0.4 t--------------------------------------------------------I 0.2 +--------------------------------------------------------1 o +---------------~----------------~--------------~-----I Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • Detected Values Non-Detected Values ;;;;;;ill"" "i1!t= Intii5~A ~ §to'-!!! Time concentration plots for MW-33 Sulfate in MW-33 2500 1"------------------------------. 2000 t-----------------------------I :J 1500 ~ ~ ~ Insufficient water for sampling ] 1000 500 t----------------------------I o +---------------,--------------~-------------~-~ Sample Date Uranium in MW-33 50 I"---------------------------~ 40 t-----------------------------I :J ~ 30 t-------------------------------------~ .§. E ~ ·c g 20 10 Insufficient water for sampling o +--------------~--------------_.---------------r_--I Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 • • Detected Values Non-Detected values 80 70 • 60 ~ 50 "all £ CI) 40 :E ~ :c u 30 20 10 0 ~..,t::> ~o 0.6 • 0.5 0.4 ~ 'ba £ CI) 0.3 :E ~ :::I u: 0.2 0.1 0 ~.$J ~o Time concentration plots for MW-34 Chloride in MW-34 t::> ~.., rIJ~ Q ..,'1><;' Sample Date Fluoride in MW-34 § ~.., rIJ ..,'I><f Q Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 ~.., <,.d • • Detected Values Non-Detected Values 2500 2000 :J 1500 o:a .§. (II ... J!! "5 1000 ." 500 a 30 25 20 :J o:a .§. E 15 ::s 'c l! ::J 10 5 a ~,.:~ ~o • • Time concentration plots for MW-34 Sulfate in MW-34 Sample Date Uranium in MW-34 c:~ ~"" ()'t; ... ~(' Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 !\."" ... d • • Detected Values Non-Detected values 80 70 60 :::i" 50 "ba .§. QJ 40 :2 ::; :i: u 30 20 10 0 ,l' ~o 0.45 0.4 0.35 0.3 :::i" "ba 0.25 .§. QJ :2 ::; 0.2 ::I Ii: 0.15 0.1 0.05 0 ~'>~ ~o • • Time concentration plots for MW-35 Chloride in MW-35 r:"'~ :.'" Qrt; .... ",<::' Sample Date Fluoride in MW-35 c:'>~ :.,'> cj'J .... ",<::' Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 ~.., ... li • • Detected Values Non-Detected values ::i' "iii; .§. III .... ~ :I 11'1 ::i' "iii; .§. E :I 'c t! :J Time concentration plots for MW-35 Sulfate in MW-35 2500 • 2000 1500 1000 500 o +---------------~----------------~--------------------~----~ 30 • 25 20 15 10 5 0 ~"'~ ~o Sample Date Uranium in MW-35 c:"'~ !'>'" <:f \~('o Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 4th Quarter 2010 ~'" «,f1 • • Detected Values Non-Detected Values Tab J CSV Transmittal Letter Kathy Weinel From: Sent: To: Cc: Subject: Attachments: Dear Mr. Lundberg, Kathy Weinel Friday, February 2S, 2011 9:29 AM rlundberg@utah.gov Jo Ann Tischler; David Frydenlund Transmittal of CSV Files White Mesa Mill 2010 04 Groundwater Monitoring 1010330-EDD.csv; 1 011246-EDD.csv; 1 011302-EDD.csv; 1 011399-EDD.csv; 10114S2- EDD.csv; 1 011479-EDD.csv; 1 011S04-EDD-CSV.csv; 1 012066-EDD CSV.csv; 101234S-EDD CSV.csv; C1 011 0730_R1.csv; C1 011 0844.csv; C1 011 0870.csv; C1 011 0928.csv; C1 01201 OS _R1.csv; C10120641 .csv; C10100941 .csv; C10110S0S_R1.csv; C10110S84_R1 .csv Attached to this e-mail is an electronic copy of laboratory results for groundwater monitoring conducted at the White Mesa Mill during the fourth quarter of 2010, in Comma Separated Value (CSV) format. Please contact me at 303-389-4134 if you have any questions on this transmittal. Yours Truly Kathy Weinel Denison Mines (USA) Corp. Quality Assurance Manager 1