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HomeMy WebLinkAboutDRC-2011-006309 - 0901a0688023a08dDENISON MINES Sent VIA Federal Express May 27, 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 60265 USA Tel: 303 628-7798 Fax: 303 3894125 www.denisonmines.com Re: Transmittalof 1st Quarter 2011 Groundwater MonUoring Report Groundwater QuaUty 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 1 st Quarter of 2011 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 very 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 DENISONI)~~ MINES Sent VIA Federal Express May 27, 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 Re: Transmittal of lst Quarter 2011 Groundwater Monitoring Report Denison Mines (USA) Corp. 1050 17th Street, Suite 950 Denver, CO 80265 USA Tel: 303 628·7798 Fax: 303 389-4125 www.denisonmines.com 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 1st Quarter of2011 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 very truIY'~ ~INES (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 White Mesa Uranium Mill Groundwater Monitoring Report State of Utah Groundwater Discharge Permit No. UGW370004 1st Quarter (January through March) 2011 Prepared by: Denison Mines (USA) Corp. Suite 950 1050 17i11' Street Denver CO 80265 May 27,2011 TABLE OF CONTENTS 1.0 INTRODUCTION ................................................................................................... 1 1.1 GWDP Modifications During the First Quarter ................................................... 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 .................................................................................... 2 2.1.5 Groundwater Head Monitoring ..................................................................... 3 2.2 Field Data ............................................................................................................. 3 2.3 Laboratory Results -Quarterly Sampling ............................................................ 3 2.3.1 Copy of Laboratory Results .......................................................................... 3 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 ........................................ 6 3.0 QUALITY ASSURANCE AND DATA VALIDATION ....................................... 6 3.1 Field QC Samples ................................................................................................. 6 3.2 Adherence to Mill Sampling SOPs ...................................................................... 7 3.3 Analyte Completeness Review ............................................................................. 7 3.4 Data Validation .................................................................................................... 8 3.4.1 Field Data QAlQC Evaluation ...................................................................... 9 3.4.2 Holding Time Evaluation ............................................................................ 10 3.4.3 Receipt Temperature Evaluation ................................................................. 10 3.4.4 Analytical Method Checklist ...................................................................... 10 3.4.5 Reporting Limit Evaluation ........................................................................ 11 3.4.6 Trip Blank Evaluation ................................................................................. 11 3.4.7 QAlQC Evaluation for Routine Sample Duplicates ................................... 11 3.4.8 Radiologies Counting Error and Duplicate Evaluation .............................. 11 3.4.9 Rinsate Blanks ............................................................................................ 12 3.4.10 Other Laboratory QAlQC ........................................................................... 13 4.0 CORRECTNE ACTION REPORT ...................................................................... 16 4.1 Identification and Definition of the Problem ..................................................... 16 4.2 Assignment of Responsibility for Investigating the Problem ............................ 16 4.3 Investigation and Determination of Cause ofthe Problem ................................ 16 4.4 Determination of a Corrective Action to Eliminate the Problem ....................... 17 4.5 Assigning and Accepting Responsibility for Implementing the Corrective ...... 17 4.6 Implementing the Corrective Action and Evaluating Effectiveness .................. 17 4.7 Verifying That the Corrective Action Has Eliminated the Problem .................. 17 4.8 Assessment of Corrective Actions from Previous Period .................................. 17 6.0 ELECTRONIC DATA FILES AND FORMAT ................................................... 18 7.0 SIGNATURE AND CERTIFICATION ................................................................ 19 1 LIST OF TABLES Table 1 Summary of Well Sampling for the Period Table 2 Exceedances and Acceleration Requirements Table 3 GWCL Exceedances Through First Quarter 2011 Under the June 17,2010 and February 15, 2011 GWDP 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-10 Rinsate Evaluation 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 LF.l of State of Utah Groundwater Discharge Pennit No. UGW370004 (the "GWDP") for the first quarter of 2011 (the "quarter") for Denison Mines (USA) Corp's. ("DUSA's") White Mesa Uranium Mill (the "Mill"). As required under Parts I.E. 1 , LE.2 and LE.5 of the GWDP this Report includes all recorded field measurements and laboratory analyses for well monitoring conducted during the quarter. 1.1 GWDP Modifications During the First Quarter During the first quarter of 2011, the approved June 17, 2010 GWDP was revised on February 15, 2011. The revision incorporated changes necessary to address various activities at the Mill. No changes were issued to the Groundwater Compliance Limits ("GWCLs") specified in Table 2; however, the following were changes issued for the groundwater monitoring program described herein. The February 15, 2011 revision to the GWDP, Part 1.E.2 changed the status of MW-20 and MW-22 from background monitoring wells to general monitoring wells. The frequency of monitoring for these wells was changed from quarterly to semiannually. Additionally, the revised GWDP changed the monitoring requirements for MW-33 and MW-34. Because MW-33 has been dry since installation no further head monitoring or sampling is required per the revised GWDP. Head monitoring on a quarterly basis is still required in MW-34, but sampling is no longer required per the revised GWDP. Two replacement monitoring wells for MW-33 and MW-34 are also required to be installed as a result of the revised GWDP. These two replacement wells will be monitored under this groundwater monitoring program upon installation and development. 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, chlorofonn contaminant investigation wells and nitrate contaminant investigation wells is attached under Tab A. Groundwater samples and measurements were taken during this reporting period (January through March), as discussed in the remainder of this section. 2.1.1 Groundwater Compliance Monitoring Groundwater samples and field measurements collected during the first quarter included both quarterly and accelerated monitoring. Accelerated monitoring is discussed below in Section 2.1.2. In this first quarter report, samples classified as being collected quarterly include those wells which are routinely sampled every quarter as well as semi-annual wells which are sampled on an accelerated quarterly schedule due to exceedances reported in previous quarterly reports. Wells which are sampled routinely every quarter 1 N:lRequired ReportslOroundwater Quarterly Monitoring Report\20 II Q I \20 11_ Q I_OW _Report tcxt.doc were analyzed for the parameters listed in Table 2 and Part I.E.1.c) 2)ii of the GWDP dated June 17, 2010 and February 15, 2011. The semi-annual wells which have been accelerated to quarterly are analyzed only for those parameters which exceeded the Groundwater Compliance Limits ("GWCLs") in Table 2 and Part I.E.1.c) 2)ii of the GWDP as described in the 4th Quarter Groundwater Monitoring Report (DUSA March 1,2011). 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 rinsate blanks. 2.1.2 Accelerated Groundwater Monitoring. In addition to the quarterly monitoring referenced above, accelerated monthly sampling was performed, and results reported, for the wells indicated in Table 1. The accelerated sampling frequency, analyte list and well list were determined based on the previously reported analytical results and are included in Table 2 of this report. 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. These two wells were continually monitored on a quarterly basis through the first quarter of 2011. As noted in Section 1.1 above, on February 15, 2011, the sampling frequency requirements for MW-20 and MW-22 were changed to semi-annually. MW- 20 and MW-22 were sampled during the first quarter 2011 either before (as in the case of MW-22) the February 15, 2011 permit revision, or shortly after the receipt of the February 15, 2011 permit revision (as in the case of MW-20). These data are included for information purposes. The revised frequency for sampling MW-20 and MW-22 will be implemented starting in the second quarter 2011. Table 1 indicates the sampling dates and the dates DUSA received laboratory data for these wells during 2011. 2.1.4 Parameters Analyzed All routine quarterly groundwater monitoring samples were analyzed for the parameters listed in Table 2 and Part I.E. 1. c) 2)ii of the GWDP dated June 17,2010 and February 15, 2 N:lRequired ReportslGroundwater Quarterly Monitoring Report12011 QI12011_QI_GW_Report text.doc 2011. The accelerated monitoring samples were analyzed for a more limited and specific parameter list as shown in Table 2 of this report. 2.1.5 Groundwater Head Monitoring Depth to groundwater was measured in the following wells and/or piezometers, pursuant to Part I.E.2 ofthe GWDP dated June 17,2010 and February 15, 2011: • The groundwater compliance monitoring wells including MW -20, MW -22, MW- 34, and MW-35. • Existing monitoring well MW-4 and all of the temporary chloroform investigation wells. • Piezometers -P-l, 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 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 wells MW-20 and MW-22, which will change to a semi-annual frequency commencing in the second quarter 2011 as discussed above. Attached under Tab C are copies of all field data sheets recorded in association with the January and March 2010 accelerated monitoring and sampling efforts. 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"). 3 N:lRequired ReportslOroundwater Quarterly Monitoring Report120 II Q 1120 11_ Q I_OW _Report text. doc 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 first quarter under the GWDP (i.e., all regular quarterly and accelerated samples), are provided in Tab E. Also included under Tab E are the results of analyses for duplicate and rinsate blank samples for this sampling effort, as identified in Table 1. The laboratory report dates for samples collected for the January and March accelerated sampling (i.e. quarterly accelerated to monthly) are provided in Table 1. Results from analysis of samples collected for the January and March accelerated sampling (i.e. quarterly accelerated to monthly) are provided in Tab F. Also included under Tab Fare 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 (June 17, 2010 and February 15, 2011), background groundwater quality has been determined on a well-by-well basis, as defined 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 in the January 20, 2010 GWDP. These new GWCLs were in effect for sampling required during the current first quarter monitoring period. Exceedances of the January 21,2010 GWCLs as reported in 2010 reports determined the accelerated monthly monitoring program implemented during this quarter. Exceedances of the GWCLs for the first quarter (January through March) of2011 are listed in Table 2 for sampling required under the revised GWDP (June 17, 2010 and February 15, 2011). Table 3 shows the accelerated sampling program which started in the second quarter 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. 4 N :\Required ReportslGroundwater Quarterly Monitoring Report\20 II Q I \20 11_ Q I_OW _Report text doc 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 ofthe issuance of the revised GWDP on January 20,2010, which sets revised GWCLs, all requirements to perform accelerated monitoring under Part I.G.1 ofthe previous GWDP ceased effective on January 20, 2010, and the effect ofthe 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 first quarter 2011 was required under the revised GWDP for only those constituents that exceeded the GWCLs in 2010. 2.4.3 Compliance Status Analytes which have exceeded the GWCLs set forth in the GWDP for 2010 are summarized in Table 2. The analytes which exceeded their respective GWCLs during the first quarter 2011 will be sampled on an accelerated schedule as noted in Table 2. Analytes which exceeded their respective GWCLs during 2010 are currently sampled on an accelerated schedule. A review of the accelerated data collected during first quarter 2011 indicate that several analytes have exceeded their respective GWCLs for two consecutive sampling periods as reported in DUSA's letter to DRC on May 13, 2011. Table 3 summarizes the results of the accelerated sampling program from first quarter 2010 through first quarter 2011. Part I.G.l c) of the GWDP states, with respect to exceedances of GWCLs, "that the Permittee shall prepare and submit within 30 calendar days to the Executive Secretary a plan and a time schedule for assessment of the sources, extent and potential dispersion of the contamination, and an evaluation of potential remedial action to restore and maintain groundwater quality to insure that Permit limits will not be exceeded at the compliance monitoring point and that DMT or BAT will be reestablished." DUSA submitted an exceedanxce notice on May 13, 2011 for the first quarter 2011 results. The summary in the Exceedance Notice includes, for each exceedance, a brief discussion of whether such a plan and schedule is required at this time in light of other actions currently being undertaken by Denison, as determined by Utah Department of Environmental Quality ("UDEQ") Staff and stated in teleconferences with Denison on April 27 and May 2, 2011. Where applicable, the plans and time schedules for assessment will be submitted to the Executive Secretary within 30 days of the May 13, 2011 Exceedance Notice. 5 N:lRequired ReportslGroundwater Quarterly Monitoring Report1201l QI12011_Ql_GW_Report text, doc 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 3.4.9 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 ofthe Mill's Chain of Custody and Analytical Request Record forms for each set of Analytical Results, 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. 6 N;\Required ReportslGroundwater Quarterly Monitoring Report120 II Q 1120 11_ Q I_OW _Report text.doc Three 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. Three 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 MW-33, MW-34, and MW-35. A rinsate blank sample was collected from the pump prior to sampling MW-35. There is no rinsate blank associated with either MW-33 as it was dry, or MW-34 which is sampled with a disposable bailer due to the low volume of water present. Sampling with a disposable bailer is contemplated by the approved QAP for wells which cannot be sampled using a pump. Duplicate, trip blank and rinsate sample results are shown in Tab G. 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. 3.3 Analyte Completeness Review All analyses required by the GWDP for the quarterly wells were performed. The accelerated quarterly sampling (quarterly to monthly) required for this quarter, as shown in Tables 2 and 3, was performed as required except as noted below. 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 with one exception as noted below. Accelerated sampling for gross alpha in MW -26 was initiated as soon as the exceedance requirement was identified in February 2011. The fourth quarter data were received in late February 2011 due to an analytical problem that was identified with the fourth quarter 2010 sample which required the sample be reanalyzed within the approved holding time of 6 months. A gross alpha sample was not collected in MW-26 in January 2011, because the data for the fourth quarter 2010 sampling event was not received until 7 N:lRequired ReportslOroundwater Quarterly Monitoring Report\20 11 Q 1 \20 11_ Q I_OW _Report text.doc February 2011. Due to the receipt date of the reanalyzed data (February) it was not possible to collect a sample in January. Denison's management review of groundwater QA/QC identified an error in the checking spreadsheet for field pH. No other analytes were affected. Correction of the spreadsheet resulted in corrections to field pH entries reported in the Exceedance Notices for Q1 through Q4, 2010 as follows: • Fourteen of the corrected pH values remained within compliance limits and there were no changes other than the values reported. • Ten pH values in five wells which were not previously reported as exceedances have been identified as exceedances. All five wells were already in accelerated monitoring status for either pH or another analyte and field pH measurements were collected. • Seven pH values in five wells which were incorrectly reported as exceedances have been identified as being in compliance. In all of these instances no data were lost as a result of the corrections to the data reporting and checking spreadsheets. • One instance of a missed accelerated sampling event for field pH was noted as a result of the corrections to the spreadsheet. The field pH in MW-29 was outside compliance limits in the fourth quarter 2010 and accelerated (quarterly) sampling should have begun in the first quarter 2011; however, the spreadsheet error and changed pH entry was not identified until second quarter 2011. It should be noted that per Denison's letter to UDEQ of January 31, 2011, GWCLs for pH are under re-evaluation, and proposed revised GWCLs will be submitted to UDEQ on or before June 30, 2011. Any pH exceedance reported in previous exceedance tables for first through fourth quarter 2010, or in the corrected table in the May 13, 2011 Exceedance Notice, may no longer be an actual exceedance following implementation of new GWCLs. Corrective actions are described in more detail in Section 4 ofthis 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 QA/QC evaluation, a receipt temperature check, a holding time check, an analytical method check, a reporting limit check, a trip blank check, a QA/QC evaluation of routine sample duplicates, a QA/QC evaluation of accelerated sample duplicates, a gross alpha counting error evaluation and a review of each laboratory's reported QA/QC information. Each evaluation is discussed in the following sections. Data check tables indicating the results of each test are provided under Tab G. 8 N:IRequired ReportslGroundwatcr Quarterly Monitoring Report\20 II Q I \20 11_ Q I_OW _Report text-doc 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 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-3S. In all cases these wells were evacuated to dryness before two casing volumes could be pumped. In addition, MW -20 was purged to dryness after 2 casing volumes had been purged. All accelerated sampled locations conformed to the QAP requirement to evacuate two well casing volumes before sampling. During review of the field data sheets, it was observed that sampling personnel consistently recorded depth to water for the quarterly and 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 S 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 S NTU prior to sampling. As such the noted observations regarding turbidity measurements greater than S NTU below are included for information purposes only. • Turbidity measurements were less than S NTU for all of the quarterly wells except MW-S, MW-12, MW-19, MW-20, MW-32, and MW-34. The QAP does not require that turbidity measurements be less than S NTU prior to sampling. 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 sampling wells. • Turbidity measurements were less than S NTU for all of the accelerated sampling. Turbidity measurements prior to sampling were within a 10% RPD for all accelerated sampling wells DUSA's letter to UDEQ of March 26, 2010 discusses further why turbidity does not appear to be an appropriate parameter for assessing well stabilization. In response to UDEQ's subsequent correspondence dated June 1, 2010 and June 24, 2010, DUSA is 9 N:lRequired ReportslGroundwater Quarterly Monitoring Report120 II QI12011_QI_ OW_Report tcxt.doc currently implementing a monitoring well redevelopment program. The redevelopment program has reviewed the available turbidity data for the nitrate wells and has developed a list of wells that have undergone redevelopment utilizing several strategies. The redevelopment strategies include additional surging and bailing and overpumping as necessary. Surging and bailing and overpumping for the nitrate and chloroform wells is complete. Redevelopment of the groundwater wells is in progress. Data from the redevelopment of the groundwater wells will be reviewed with the data from the redevelopment of the chloroform and nitrate program wells. A single report will be prepared at the completion of the redevelopment program for the wells in all three programs, which is planned for submittal on or before the end of the third quarter 2011. DUSA will review the redevelopment data and summarize the status of the Mill wells. Redevelopment results will be discussed with UDEQ in an effort to come to a consensus regarding turbidity considerations for the groundwater wells at the Mill site. All other field parameters (conductance, pH, redox potential, and temperature) for all wells were within the required RPD for both quarterly 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 for the laboratory pH measurement in the rinsate blank MW-35R as noted by the "H" qualifier in the laboratory data which is included in Tab E. Laboratory pH is not a required parameter on Table 2 of the GWDP. The required field pH measurement was collected at the time of sampling as required by the GWDP and as such there is no affect on the quality or usability of the data. 3.4.3 Receipt Temperature Evaluation Chain of Custody sheets (for AWAL) 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 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 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 Quality ("UDEQ") Bureau of Lab Improvement. Potentially, to accommodate ongoing improvement in technology and methodology, the entire Table 1 and the Chloroform 10 N :\Required Report.IOroundwater Quarterly Monitoring Report\20 11 Q 1 \20 11_ Q I_OW _Report te.t.doc 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 routine 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 blank contamination. Trip blank evaluations are provided in Tab G. All trip blank results associated with both the quarterly 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 with detections in both the parent and duplicate sample 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 samples. Results of the RPD test are provided under Tab G. All duplicate results were within a 20% RPD in the accelerated samples. 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% 11 N :\Required ReportslGroundwater Quarterly Monitoring Report\20 II Q I \20 11_ Q 1_ GW _Report te.l.doc 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. The quarterly and accelerated sample and duplicate results met the comparability check specified in the QAP. Results of quarterly and accelerated radiologic sample QC are provided under Tab G. All quarterly and accelerated radiologic sample results met the counting error requirement specified above. 3.4.9 Rinsate Blanks One rinsate blank and one DIPB were collected. Rinsate blank sample checks are provided in Tab G. Per the approved QAP, DIFBs are not required and as such there are no acceptance criteria. The DIFB had reported detections of bicarbonate as HC03. (bicarbonate) chloride, and sulfate. It is important to note that several of the method blanks also had detections of sulfate and bicarbonate, and the detections of those analytes in both the rinsate blanks and DIFB are most likely the result of low level laboratory contamination. Chloride was not detected in the rinsate blank, and therefore its detection is not applicable to the results and has no affect on the quality or usability of the results. The rinsate blank sample had reported low level concentrations of bicarbonate, nitrate, sulfate and iron. 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 analytes but nitrate met this criterion. The nitrate levels reported in the rinsate blank samples for this investigation are similar to the nitrate rinsate sample concentrations reported for the previous nitrate and chloroform sampling programs. The investigation into the nitrate reported in the rinsate blanks will continue as part of the chloroform and nitrate sampling programs because dedicated pumps have been installed into all of the current groundwater wells and rinsate blanks are not anticipated during the groundwater program. The data collected for this ongoing investigation under the nitrate and chloroform programs is as follows: • The nitrate concentrations in the rinsate samples from both the chloroform sampling program and the nitrate sampling program are just slightly above the detection limit and are not dependent on or affected by the previous sample concentrations. • The presence of nitrate in both the chloroform and nitrate sampling programs indicates that the contamination is due to external factors such as the nitric acid rinse during the decontamination process and potential absorption of nitrogen 12 N :\Required ReportslOroundwater Quarterly Monitoring Report120 11 Q 112011_ Q I_OW _Report text.doc from the nitric acid into the non-stainless steel portions of the purging equipment including the pump tubing and connectors. The investigation into the nitrate in the rinsate blanks is continuing, with additional focus on the rinsate collection process. Nitric acid introduced during the decontamination process is the single highest possible source of nitrate ions. However, there may be some contribution of nitrate from the decontamination process andlor the purging equipment. To address these issues, the decontamination process and rinsate collection process are being reviewed to determine if the purging equipment in combination with the nitric acid wash used during the decontamination process are causing the nitrate detections in the rinsate blanks. Corrective actions are described in Section 4.0 3.4.10 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 WAL 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. Seventeen sets of quarterly sample results (thirteen wells, two duplicates, one rinsate and one DIFB) and six sets of accelerated samples had the reporting limit raised for at least one analyte due to matrix interference andlor 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. The check samples included at least the following: a method blank, a laboratory control spike ("LCS"), a matrix spike (.oMS") and a matrix spike duplicate ("MSD"), or the equivalent, where applicable. It should be noted that: • Laboratory fortified blanks are equivalent to LCSs. 13 N:lRequired ReportslGroundwater Quarterly Monitoring Report\20ll QI\2011_QI_GW_Report te.~doc • 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.I, used to determine gross alpha, a sample duplicate was used instead of a MSD. All qualifiers, and the corresponding explanations reported in the QNQC 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 QNQC Summary Reports indicates that the MS/MSDs recoveries and the associated RPDs for all quarterly 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 outside of the acceptance limits are indicative of matrix interference. Furthermore, the quarterly VOC sample (CI1020352) 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 QNQC 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 percent recovery for the March monthly uranium sample in (CII030538) spiked for the MS/MSD analyses was not calculated as the analyte level in the sample was greater than 4 times the spiking level added to the sample. The sample that was spiked for the MS/MSD pair was not collected at the Mill, and the high level of uranium reported in the sample 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 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 and accelerated sampling met the requirement specified 14 N:lRequired ReportslGroundwater Quarterly Monitoring Report120 II Q 1120 11_ Q 1_ GW _Report text.doc in the QAP. The infonnation from the Laboratory QAlQC Summary Reports indicates that the surrogate recoveries for all quarterly 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. Furthennore, 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 infonnation from the Laboratory QAlQC Summary Reports indicates that the LCS recoveries for both the quarterly and accelerated samples were within acceptable laboratory limits for all LCS compounds. 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 laboratory- grade water sample made and carried through all analytical steps. Reagent blanks are blanks created post sample preparation and are applicable only to samples which do not undergo an analytical preparation step such as digestion or extraction. For the Mill samples, a method blank is prepared for all analytical methods, but reagent blanks are created only for the metals samples. Per the approved QAP, contamination detected in analysis of reagent blanks (and method blanks) will be used to evaluate any analytical laboratory contamination of environmental samples. The QAP does not specify the process for evaluation of reagent or method blanks. For consistency, the QAP required evaluation criteria for rinsate blanks will be used. The QAP criteria for rinsate blanks states that nonconfonnance will exist when blanks are within an order of magnitude of the sample results. Twenty-six analytes in the quarterly samples and two analytes in the accelerated samples were reported in either the method blanks or reagent blanks from EL. Method and reagent blank results are included in Tab E. In all cases the positive sample results were more than an order of magnitude greater than the reagent/method blanks results. The detections noted for the reagent/method blanks are lower than the reporting limits specified in the QAP except for bicarbonate, sodium and sulfate which were reported at or above the QAP required RLs. In the case of bicarbonate, sodium and sulfate the sample results were several orders of magnitude above the method/reagent blank detections and therefore had no affect on the usability of the data. The low level detections in the method/reagent blank samples have no affect on the quality or usability of the data. The method/reagent blank samples which had detections at or above the QAP required RL also had no affect on the quality or usability of the data due to the levels of detections in the samples which were significantly higher than the method/reagent blank results. Additionally, blank detections are 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/reagent blank with each batch and evaluate the results has been completed as required. 15 N :\Required ReportslGroundwater Quarterly Monitoring Report120 11 Q 1120 11_ Q 1_ GW _Report text.doc 4.0 CORRECTIVE ACTION REPORT Necessary corrective actions identified during the current monitoring period are described below, in accordance with Part I.F.l.e of the GWDP. The corrective action for nitrate detections reported in the rinsate blanks is discussed in the nitrate and chloroform reports for the first quarter 2011. The nitrate levels in the rinsate blanks is not discussed below because Denison plan to address this issue with the installation ofa dedicated pump in MW-35, which is the only groundwater well that was previously sampled with a portable pump, (with the prior approval of the Executive Secretary in accordance with Part I.E. 11 of the GWDP) that is, there will no longer be any groundwater wells that use a portable pump and would therefore require a rinsate blank sample. Because a dedicated pump will be installed in MW-35, the corrective action for the groundwater program will be complete when the pump is installed. If future sampling with a portable pump is necessary, rinsate blanks will be collected and assessed as necessary. 4.1 Identification and Defmition of the Problem Denison's management review of groundwater QAlQC identified an error in the checking spreadsheet for field pH. Correction of the spreadsheet resulted in corrections to some field pH entries reported in the Exceedance Notices for Ql through Q4, 2010. No other analytes were affected. As described in Section 3.3 and in the May 13, 2011 Exceedance Notice, field pH corrections resulted in some samples being reported as exceedances when they were not; some samples not being reported as exceedance; and some samples retaining the same compliance status. The corrected spreadsheet identified one additional well to be sampled for field pH. The field pH in MW-29 was outside compliance limits in the fourth quarter. The spreadsheet error and changed pH entry was identified in second quarter 2011and accelerated field pH sampling was initiated in April 2011 during the second quarter. However,it should be noted that per Denison's letter to UDEQ of January 31,2011, GWCLs for pH are under re-evaluation and proposed revised GWCLs will be submitted to UDEQ on or before June 30, 2011. Any pH exceedance reported in previous exceedance tables for first through fourth quarter 2010, or in the corrected table in the May 13, 2011 Exceedance Notice, may no longer be an actual exceedance following implementation of new GWCLs. Rinsate Blank Detections DI water used for decontamination does not show the presence of nitrate; however, low level nitrate was reported 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 16 N :\Required ReportslGroundwater Quarterly Monitoring Report120 11 Q 1120 1 1_ Q 1_ G W _Report te<t,doc The corrections to the field pH values were the result of a spreadsheet error which caused the incorrect reporting of several field pH values in Q1 through Q4 2010. 4.4 Determination of a Corrective Action to Eliminate the Problem All spreadsheets used for data checking have been verified. Additional staff are being trained to review data management tools and verify entries. 4.5 Assigning and Accepting Responsibility for Implementing the Corrective Action It will be the responsibility of the Director, Compliance and Permitting to implement this corrective action. 4.6 Implementing the Corrective Action and Evaluating Effectiveness The corrective action described above is complete. The data management spreadsheets have been verified and all field pH data have been corrected. Additional verification will be conducted quarterly. 4.7 Verifying That the Corrective Action Has Eliminated the Problem Verification is complete. The corrected values are currently reflected in the data management tools in use. Additional verification will be conducted quarterly to assure that the spreadsheets accurately reflect the reported values. 4.8 Assessment of Corrective Actions from Previous Period The previous Groundwater Monitoring Report (DUSA February 28,2011) specified two corrective actions. The first corrective action was to correct rinsate blank collection procedures and the second was the result of an accelerated monitoring frequency omission. The effectiveness ofthose corrective actions is discussed below. The fourth quarter 2010 quarterly groundwater report noted that: "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." During the first quarter 2011, the rinsate collection procedure was followed as required and the appropriate number of rinsate blanks was collected. A DIFB was also collected. Additionally, a corrective action to install a dedicated pump in MW-35 prior to the end of the second quarter 2011 was noted. The installation of the dedicated pump will be 17 N :\Required ReportslGroundwater Quarterly Monitoring Report120 II Q 1120 11_ Q ,_ GW _Report text.doc completed upon receipt of Executive Secretary approval. After installation of the dedicated pump, rinsate blanks will no longer be required under the groundwater sampling program and as such this corrective action will be considered complete. The fourth quarter 2010 quarterly groundwater report noted that "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." The omission of the analytes from the December monthly event prompted the QA Manager to revise the exceedance tracking procedures, and review frequency and procedures for the analytical data received from the laboratory. Additional staff were trained and used to review data against the GWCLs which resulted in a quicker processing time and additional reviews of the requirements. The monthly accelerated program conducted in March 2011, included all analytes scheduled to be sampled in March as specified in the corrective action. No further corrective action is required. 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 I. 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") format from the A W AL data. A copy of the transmittal e-mail is included under Tab J. 18 N :\Required ReportslOroundw.ter Quarterly Monitoring Report\20 11 Q 1 \20 11_ Q I_OW _Report text.doc 7.0 SIGNATURE AND CERTIFICATION This document was prepared by Denison Mines (USA) Corp. on May 27, 2011. (USA) CORP. By: . Fryde und Vice President, Regulatory Affairs and Counsel 19 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 owle e and belief, true, accurate, and complete. 1 am aware that there are significant nalti for submitting false information, including the possibility of fine and nt fo owing violations. Dav' Fryd lund Vic President, Regulatory Affairs and Counsel Denison M'mes (USA) Cotp. 20 Tables Table I: Summary of Well Sampling for the Period Purpose for sampling Well Normal Frequency this quarter Sample Date Date of Lab Report Quarterly Samples MW-II Quarterly Quarterly 2/2/20 II 3110/2011 (21712011) MW-14 Quarterly Quarterly 21712011 3/15/2011 (2/17/2011) MW-20 Quarterly Background* 2116/2011 3/24/20 II (2/22120 II) MW-22 Quarterly Background* 2/8/2011 3115/2011 (2117/20 ll) MW-25 Quarterly Quarterly 2/2/2011 311 0/20 II (217120 II ) MW-26 Quarterly Quarterly 2/16/2011 3/24/20 II (2/22/20 11) MW-30 Quarterly Quarterly 2/112011 3/10/20 II (217120 II ) MW-31 Quarterly Quarterly 2/1/2011 311 0/20 II (217120 II ) MW-33 Quarterly Quarterly· Dry Dry MW-34 Quarterly Quarterly* 2116/2011 3124/20 II (2122120 II) MW-35 Quarterly Quarterly 2115/2011 3124/20 II (2/22/2011) MW-35R I per day** Rinsate of MW-35 2114/2011 3/24/20 II (2/22/20 11) MW-60 I per sample period or Field Blank 2116/2011 3/24/2011 (2/2212011) MW-65 I per Batch Duplicate of MW -22 2/8/2011 3/15/2011 (2117/2011) Accelerated Samples Accelerated Quarterly Samples MW-2 Semi-annually Accelerated 211412011 3/24/2011 MW-3 Semi-annually Accelerated 2/1512011 3/24/2011 MW-3A Semi-annually Accelerated 2/16/2011 3 124/20 II MW-5 Semi-annually Accelerated 2/14/2011 3/24/2011 MW-12 Semi-annually Accelerated 2/15/2011 3/24/2011 MW-18 Semi-annually Accelerated 211512011 3/24/2011 MW-19 Semi-annually Accelerated 2/2112011 Field pH -2/21/2011 MW-23 Semi-annually Accelerated 2/912011 Field pH -2/9/2011 MW-24 Semi-annually Accelerated 2110/2011 3115/2011 MW-27 Semi-annually Accelerated 2/912011 3115/2011 MW-28 Semi-annually Accelerated 2114/2011 3/24/2011 MW-32 Semi-annually Accelerated 2/9/2011 3/15/2011 MW-70 I per Batch Duplicate of MW -18 2115/2011 3/24/2011 Accelerated January Monthly MW-II Monthly Accelerated 1111/2011 2/1/2011 (1120/2011) MW-14 Monthly Accelerated 111112011 Field pH -IIll/20ll MW-25 Monthly Accelerated 111112011 211120 II MW-26 Monthly Accelerated 1112/2011 2/112011 MW-30 Monthly Accelerated 1110/2011 2/1/2011 MW-31 Monthly Accelerated 1110/2011 2/1/2011 MW-65 Monthly Duplicate ofMW-25 111112011 21112011 Accelerated March Monthly MW-II Monthly Accelerated 3115/2011 4/14/2011 (3/15/20 II) MW-14 Monthly Accelerated 311412011 Field pH -3/14/2011 MW-25 Monthly Accelerated 311512011 4114/2011 MW-26 Monthly Accelerated 3115/2011 4/14/2011 MW-30 Monthly Accelerated 3/14/2011 411412011 MW-31 Monthly Accelerated 3114/2011 4/14/2011 MW-65 I per Batch Duplicate of MW-25 3/15/2011 4/14/2011 Notes: Date in parenthesis depicts the date that tetrahydrofuran was reported from American West Analytical Laboratories. All other constituents were reported from Energy Laboratories . • These wells were sampled either prior to or shortly after the revised GWDP was issued on February (5, 20 II. In all cases the status of these wells and the requirements to sample them were changed in the February 15, 2011 GWDP. The data are included for information purposes only. The purpose for sampling listed in the above table reflects the purpose from the previous GWDP. ** llinsates are collected at a freequency of I per day when dedicated sampling equipment is not used. Table 2 -Exceedances and Acceleration Requirements Monitoring Wen GWCLin liirst Rcsult Routine nmplo Acceleraled Exc«dnnce tRrt o(·At'c.lernled Constituent Exceeding GWCL E cc.dlltg,lbc (Water Class) Current GWDP C;WeL Frcyuoney Fi'cfJuancy Samplel'crlod Monltorl,!,!: Qun\1crly W.I" A ••• lcralc\1 to Monthly Silmpllnlll MW-II (Class II) Manganese (uglL) 131.29 134 Quarterly Monthly QI2010 May 2010 Tetrahydrofuran (uglL) 11.5 12 Quarterly Monthly QI2010 May 2010· MW-14 (Class III) Field pH (S.U) 6.5 -8.5 6.4S Quarterly Monthly QI2010 May 2010 MW-25 (Class III) Uranium (uglL) 6.5 6.57 Quarterly Monthly Q32010 Janunry 2011·· Bald aft ($;UJ 6,5 .8.5 6.36 QuWrIy MOIUh1Y QUOIO 1amJIny·2011 MW-26 (Class Ill) Nitrate + Nitrite (as N) (mglL) 0.62 1.3 Quarterly Monthly QI2010 May 2010 Uranium (uglL) 41.8 58.7 Quarterly Monthly QI2010 May2010 Chloroform (uglL) 70 700 Quarterly Monthly QI2010 May 2010 Chloride (mglL) 58.31 72 Quarterly Monthly QI2010 May 2010 Methylene Chloride (uglL) 5 9.9 Quarterly Monthly Q22010 June 2010 Field pH (S.U.) 6.74 -8.5 6.59 Quarterly Monthly QI2010 May 2010 TDS(mglL) 3284.19 3440 Quarterly Monthly Q32010 January 20 II· MW-30 (Class II) Nitrate + Nitrite Cas N) (mglL) 2.5 16.1 Quarterly Monthly QI2010 May 2010 Chloride (mglL) 128 134 Quarterly Monthly QI2011 May 2011 Selenium (ugIL) 34 35.3 Quarterly Monthly Q22010 July 2010 MW-31 (Class III) Nitrate + Nitrite (as N) (mglL) 5 21.7 Quarterly Monthly Ql2010 May 2010 TOS(mglL) 1320 1330 Quarterly Monthly Q32010 January 2011·· Sulfate (mgIL) 532 539 Quarterly Monthly Q42010 March 2011 Chloride (mg/L) [43 145 Quarterly Month[y QI2011 Mliy2011 Semi-Annual WeDs Accelerated to Quarterly SamJ>linJl' Monitoring Well GWCLln FlrslRcsult Sample Accelerated Exe •• dance Start of Accelerated (Water Class) Constituent Exceeding GWCL Current GWDP ExccedJng Ihe, Frequency Frequency I Sample Period Monitoring GWCL MW-2 (Class III) Gross Alpha minus Rn & U (PCilL) 3.2 3.5 Semi-Annually Quarterly Q42010 Ql20ll MW-3 (Class III) Selenium (uglL) 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 CmglL) 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 (mglL) 3640 3680 Semi-Annually Quarterly Q22010 Q32010 TOS CmglL) 5805 5860 Semi-Annually Quarterly Q22010 Q32010 Selenium (uglL) 89 94.8 Semi-Annually Quarterly Q42010 QI2011 MW-5 (Class II) Uranium (uglL) 7.5 11.6 Semi-Annually Quarterly Q42010 012011 Semi-Annual WeUs Accelerated to Quarterly Sampliog' MonitOring Well GWCLio First Result S~mple Accelerated Exeeedance Start of Accelerated Constituent ExceedIng GWCL E ~ccdlng Ihe (Water Class) Current GWDP GWCL. Frequency Frequency Sample Period Monitoring MW-12 (Class Ill) ~pH(S;U.)' 6;S.8;S 6.41 ~Annuallr ~ Q4.2010 Qj 20) 1 Selenium (ugll,) 25 25.7 Semi-Annually Quarterly Q22010 Q32010 MW-18 (Class III) Thallium (uglL) 1.95 3.73 Semi-Annually Quarterly Q22010 Q32010 Sulfate (mglL) 1938.9 1950 Semi-Annually Quarterly Q22010 Q32010 Field pH (S.U.) 6.25-8.5 6.2 Semi-Annually Quarterly Q22010 Q32010 TOS (mglL) 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 Ill) Cadmium (uglL) 2.5 4.28 Semi-Annually Quarterly Q22010 Q32010 Thallium (uglL) I I.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 Ill) Nitrate + Nitrite Cas NJ (mglL) 5,6 5.8 Semi-Annually Quarterly Q22010 Q32010 Chloride CmglL) 38 42 Semi-Annually Quarterly Q22010 QJ 2010 Sulfate (mglL) 462 469 Semi-Annually Quarterly Q22010 Q32010 TDS(mglL) 1075 1160 Semi-Annually Quarterly Q22010 Q32010 MW-28 (Class III) Chloride (mglL) 105 108 Semi-Annually Quarterly Q22010 Q32010 Field pl I (S. U.l 6.1 -8.5 5.67 Semi-Annually Quarterly Q22010 Q32010 MW·29 (ct.IU) field pH (S.U.) 6A6-8.s 6.17 ScmI·Ann\lalIY QIIaJUtIy 042010 022011 MW-32 (Class III) Gross Alpba minus Rn & U (PCilL) 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: I GWCL Values are taken from June 21, 2010 and February 15,2011 versions of the GWDP in whicb the GWCL table has not been changed. • THF bas not reported an exceedance since Q I 20 I 0 and has had 10 consecutive monotiring results below the GWCL. UDEQ requires continued monitoring of this constituent. Table 3 -GWCL Exceedances for First Quarter 2011 under the February 15,2011 GWDP Ql Results1 Q2 Results Q3 Results Q4 Results Monitoring GWCLin Ql Q2 May May June June July July August August Q3 October October Q4 December December Well (Water Constituent Exceeding Jun 17,2010 Sample Ql Result Sample Q2 Monthly Monthly Monthly Monthly Monthly Monthly Monthly Monthly Sample Q3 Monthly Monthly Sample Q4 Result Monthly Monthly Class) GWCL GWDP Date Date Result Sample Result Sample Result Sample Result Sample Result Date Result Sample Result Date Sample Result Date Date Date Date Date Date Required Quarterly Sampling Wells MW-ll Manganese (uglL) 131.29 2/10110 134 4/28110 137 5/24110 122 6116/10 99 7/20110 123 8/25/10 138 9/8/10 128 10/20/10 141 1111 1110 133 12115110 158 (Class I£) Tetrahydrofuran (ug/L) 11.5 2/1 0/10 12 4/28/10 5.2 5/2411 0 <l.0 6/16110 <1.0 7/27/10 2.17 8/25/10 <1.0 9/8/10 <1.0 <1.0 <1.0 <1.0 MW-14 Field pH (S.u.) 6.5 -8.5 2/2110 (Class III) 6.45 4/21110 6.29 5/21 /10 6.36 6/16/10 6.45 7/20/10 7.19 8/25/10 6.48 9/8/10 6.51 10/20110 6.60 11/10/10 6.37 12/1511 0 6.47 MW-25 (Class Field pH (S.U.) 6.5 - 8.5 6.53 7.2 NS NA NS NA NS NA NS NA 6.58 NS NA 1111011 0 6.36 NS NA III) 2/26/2010 4/28/2010 9/8/2010 Uranium 6.5 5.93 6.43 NS NA NS NA NS NA NS NA 6.57 NS NA 5.89 NS NA Nitrate + Nitrite (as N) 0.62 1.3 2 0.3 0.4 0.6 0.6 0.7 0.4 0.2 0.4 CmglL) 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 Chloroform (ug/L) 70 700 1700 800 940 900 2800 2100 1000 1900 1400 Chloride (mg/L) 58.31 72 57 80 47 52 49 64 52 48 52 MW-26 Field pH (S.U.) 6.74 -8.5 2/2/10 6.59 4/22/10 7.18 5/21 /10 6.36 6.98 6.45 6.39 6.60 6.61 6.49 12/15/10 6.45 (Class III) Dichloromethane 6116110 7/21/10 8116110 9/26/10 10/20110 11/15110 (Methylene Chloride) 5 1 9.9 NR 2.2 12 24 45 5.5 16 1.2 (uglL) TDS CmglL) 3284.19 3100 3280 NS NS NS NS 3440 NS 3140 NS Gross Alpha minus Rn & 4.69 2.4 0.6 NS NS NS NS 2.5 NS 6.4 NS U (pCi/L) Nitrate + Nitrite (as N) 2.5 16.1 15.8 17 15.3 7/21110 16 8/24110 16 15 15 15 16 MW-30 CmgIL) (Class II) Chloride CmglL) 128 2/9/10 127 4/27/10 97 5/21/10 NS 6/15/10 NS NS NS NS NS 9/1 5/10 111 10/19/10 NS I I/9/10 126 1211411 0 NS Selenium (ug/L) 34 32 35.3 NS NS 7/27/10 33.5 8/24110 35.6 32.6 32.4 32.2 30.5 Nitrate + Nitrite (as N) 5 21.7 22.5 5/21/10 23 6/15/10 21.1 7/21110 20 8/24110 22 21 1011911 0 20 20 20 CmglL) MW-31 TDS (mglL)' 1320 2/9/10 1150 4/20/10 1220 NS NA NS NA NS NA NS NA 1330 NS NA 1320 12/14/10 NS (Class III) 9/13/10 11/9/10 Chloride CmglL) 143 128 128 NS NA NS NA NS NA NS NA 139 NS NA 138 NS Sulfate (mg/L) 532 507 522 NS NA NS NA NS NA NS NA 527 NS NA 539 NS Required Semi-Annual Sampling Wells MW-2 (Class Gross Alpha minus Rn & 3.2 NS NA l.2 NS NA NS NA NS NA NS NA NS NA NS NA 3.5 NS NA III) U (pC ilL) MW-3 (Class Selenium (uglL) 37 NS NA 37.2 NS NA NS NA NS NA NS NA 35.5 NS NA 38.8 NS NA 6.14 III) Field pH (S.U.) 6.5 -8.5 NS NA 5/3110 (6.25) NS NA NS NA NS NA NS NA 9/20110 6.39 NS NA 11/19/10 6.35 NS NA 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 Field pH (S.U.) 6.5 -8.5 NS NA 6.23 NS NA NS NA NS NA NS NA 6.42 NS NA 6.21 NS NA MW-3A (6.24) (Class III) Sulfate (mglL) 3640 NS NA 5/4/10 3680 NS NA NS NA NS NA NS NA 9/21110 3630 NS NA 11122110 3850 NS NA TDS Cmg/L) 5805 NS NA 5860 NS NA NS NA NS NA NS NA 5470 NS NA 5330 NS NA Selenium (ugIL) 89 NS NA 81.4 NS NA NS NA NS NA NS NA NS NS NA 94.8 NS NA MW-5 (Class Uranium (uglL) 7.5 NS NA 4/26/10 0.39 NS NA NS NA NS NA NS NA NS NA NS NA 11/11/10 11.6 NS NA II) MW-12 Field pH (S.U.) 6.5 -8.5 NS NA 7.16 NS NA NS NA NS NA NS NA 6.62 NS NA 6.47 NS NA (Class III) Selenium (ug/L) 25 4/27110 9/20/10 11/19110 NS NA 25.7 NS NA NS NA NS NA NS NA 31.9 NS NA 27.6 NS NA MW-18 Thallium (ug/I) 1.95 NS NA 3.73 NS NA NS NA NS NA NS NA 3.64 NS NA 3.57 NS NA (Class III) Sulfate CroglL) 1938.9 NS NA 5/4110 1950 NS NA NS NA NS NA NS NA 9115/1 0 1930 NS NA 11118/10 1910 NS NA Field pH (S.U.) 6.25-8.5 NS NA 6.2 NS NA NS NA NS NA NS NA 7.23 NS NA 6.37 NS NA TDS (mg/L) 3198.77 NS NA 3280 NS NA NS NA NS NA NS NA 3190 NS NA 3030 NS NA Q1 Results Q2 Results Q3 Results Q4 Results Monitoring GWCLin Ql Q2 May May June June July July August August Q3 October October Q4 Well (Water Constituent Exceeding Current Sample Ql Result Sample Q2 Monthly Monthly Monthly Monthly Monthly Monthly Monthly Monthly Sample Q3 Monthly Monthly Sample Q4 Result GWCL Result Sample Sample Sample Sample Result Sample Class) GWDP Date Date Result Result Result Result Date Result Date Date Date Date Date Date Required Semi-Annual Sampling Wells, continued MW-19 (Class III) Field pH (S.U.) 6.78-8.5 NS MW-23 Field pH (S.U.) 6.5 -8.5 NS _(Class III) MW-24 Cadmium (ug/L) 2.5 NS (Class III) Thallium (uglL) 1 NS Field pH (S.U.) 6.5 -8.5 NS Nitrate + Nitrite (as N) 5.6 NS (mglL) MW-27 Chloride (mg/L) 38 NS (Class III) Sulfate (mglL) 462 NS TDS (mglL) 1075 NS Gross Alpha minus Rn & 2 NS U (pCilL) MW-28 Chloride (mg/L) 105 NS (Class llJ) Field pH (S.U.) 6.1 -8.5 NS MW-29 (Class III)2 Field pH (S.U.) 6.46 -8.5 NS MW-32 Gross Alpha minus Rn & 3.33 NS (Class III) U (pCi/L) Field pH (S.U.) 6.4 -8.5 NS Notes: GWCL values are taken from February 15,2011 version of GWDP. NS = Not Required and Not Sampled NR = Required and Not Reported NA = Not Applicable Exceedances are shown in yellow NA 5/4/10 NA 4/22/10 NA NA 5/6/1 0 NA NA NA NA 5/3110 NA NA NA NA 4/19/10 NA 4/27/10 NA 4/20/10 NA 6.61 NS NA NS NA NS NA NS NA 9/15/10 6.93 (6.66) 6.18 NS NA NS NA NS NA NS NA 9/14/10 7.05 4.28 NS NA NS NA NS NA NS NA 5.06 1.3 NS NA NS NA NS NA NS NA 9/21/10 1.57 5.91 NS NA NS NA NS NA NS NA 6.64 (5.78) 5.8 NS NA NS NA NS NA NS NA 5.9 42 NS NA NS NA NS NA NS NA 42 469 NS NA NS NA NS NA NS NA 9/14/10 461 1160 NS NA NS NA NS NA NS NA 1060 1.6 NS NA NS NA NS NA NS NA NA 108 NS NA NS NA NS NA NS NA 106 9/14/10 5.67 NS NA NS NA NS NA NS NA 5.91 6.82 NS NA NS NA NS NA NS NA NS NA 5.4 NS NA NS NA NS NA NS NA 9/13/10 2.9 6.03 NS NA NS NA NS NA NS NA 6.33 o Values shown in parentheses are results from resampling of the 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 NS NA 11118110 6.8 NS NA 11122/10 6.44 NS NA 3.22 NS NA 11117/10 1.09 NS NA 6.1 NS NA 5.7 NS NA 45 NS NA 11112/10 452 NS NA 1110 NS NA 2.4 NS NA 11112/1 0 107 NS NA 5.72 NS NA 11/9/1 0 6.17 NS NA 11/10/10 8.8 NS NA 6.05 1. Denison's management review of groundwater QAlQC identified an error in the checking spreadsheet for field pH. Correction of the spreadsheet resulted in corrections to some field pH entries in Q 1 through Q4, 2010. No other analytes were affected. Fourteen of the corrected pH values remained within compliance limits and have no effect on the above table. Ten pH values in five wells which were not previously reported as exceedances have been identifed as exceedances in the corrected table. All five wells were already in accelerated monitoring status. Seven pH values in five wells which were incorrectly reported as exceedances have been identifed in the corrected table as being in compliance. The remainder of pH values in all wells for the 4 quarters were either unchanged or did not result in a change of complaince status after the corrections. It should be noted that per Denison's letter to DEQ of January 31,2011, GWCLs for pH are under re-evaluation and proposed revised GWCLs will be submitted to DEQ on or before June 30, 2011. Any pH exceedance reported in previous exceedance tables for Q1 through Q4, 2010, or the corrected table above, may no longer be an actual exceedance following implementation of new GWCLs. 2. Based on the corrected spreadsheet results, pH in MW29 was outside compliance limits in Q4 and accelerated (quarterly) sampling should have begun in Ql, 2011. However, the spreadsheet error and changed pH entry was not identified until Q2 2011. The well is currently on accelerated status. December December Monthly Monthly Sample Result Date 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 Ql 2011 Results GWCLin January January March 2011 Monitoring Well Constituent Exceeding Jun 17, 2011 2011 Q12011 Q12011 Monthly March 2011 Sample (Water Class) GWCL 2010 Monthly Monthly Sample Result Sample Monthly Frequency GWDP Sample Sample Date Date Result Date Result MW -11 (Class II) Manganese (ug/L) 131.29 1111111 121 2/2111 145 3115/11 68 Quarterly Tetrahydrofuran (ug/L) 11.5 <1.0 <1.0 <1.0 Quarterly MW-14 (Class Field pH (S.U.) 6.5 -8.5 1111111 6.37 217111 6.22 3114111 6.76 Quarterly III) MW-25 (Class lIT) Field pH (S.U.) 6.5 -8.5 1111111 6.44 2/2111 6.66 3115/11 6.79 Quarterly Uranium 6.5 7.02 4.77 6.8 Quarterly Nitrate + Nitrite (as N) 0.62 0.2 0.25 0.6 Quarterly (mg/L) Uranium (ug/L) 41.8 32 69.3 31.8 Quarterly Chloroform (ug/L) 70 800 730 1200 Quarterly Chloride (mg/L) 58.31 52 59 64 Quarterly MW-26 (Class Field pH (S.U.) 6.74 -8.5 1112111 6.83 2116111 6.06 311 5/11 6.89 Quarterly III) Dichloromethane (Methylene Chloride) 5 <1.0 10 14 Quarterly (ug/L) TDS (mg/L) 3284.19 3100 3270 3140 Quarterly Gross Alpha minus Rn & 4.69 NS 3 2.7 Quarterly U (pC ilL) Nitrate + Nitrite (as N) 2.5 15 16 17 Quarterly (mg/L) MW-30 (Class II) Chloride (mg/L) 128 1110111 NS 211111 134 3114111 NS Quarterly Selenium (ug/L) 34 36.2 34.7 34 Quarterly Nitrate + Nitrite (as N) 5 19 21 22 Quarterly (mg/L) MW-31 (Class TDS (mgIL) 1320 III 0111 1240 211111 1220 3/14/l1 1250 Quarterly III) Chloride (mg/L) 143 NS 145 NS Quarterly Sulfate (mg/L) 532 NS 538 531 Quarterly MW-2 (Class Ill) Gross Alpha minus Rn & 3.2 NS NA 1.1 NS NA Semi-Annually U (pCi/L) Selenium (ug/L) 37 NS NA 40.5 NS NA Semi-Annually MW-3 (Class III) Field pH (S.U.) 6.5 -8.5 NS NA 2115111 6.09 NS NA Semi-Annually Fluoride (Mg/L) 0.68 NS NA 0.69 NS NA Semi-Annually MW-3A (Class Field pH (S.U.) 6.5 -8.5 NS NA 6.05 NS NA Semi-Annually III) Sulfate (mg/L) 3640 NS NA 2/l6111 3730 NS NA Semi-Annually TDS (mg/L) 5805 NS NA 5770 NS NA Semi-Annually Selenium (ug/L) 89 NS NA 99 NS NA Semi-Annually MW-5 (Class II) Uranium (ug/L) 7.5 NS NA 2114111 29.5 NS NA Semi-Annually MW-12 (Class Field pH (S.U.) 6.5 -8.5 NS NA 2/15111 6.43 NS NA Semi-Annually III) Selenium (ug/L) 25 NS NA 39 NS NA Semi-Annually Thallium (ug/l) 1.95 NS NA 3.49 NS NA Semi-Annually MW-18 (Class Sulfate (mg/L) 1938.9 NS NA 1770 NS NA Semi-Annually III) Field pH (S.U.) 6.25-8.5 NS NA 2115111 6.27 NS NA Semi-Annually TDS (mg/L) 3198.77 NS NA 3250 NS NA Semi-Annually January Monitoring Well Constituent Exceeding GWCLin 2011 (Water Class) GWCL Current Monthly GWDP Sample Date 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 (ug/L) 2.5 NS Thallium (ug/L) 1 NS III) Field pH (S.u.) 6.5 -8.5 NS Nitrate + Nitrite (as N) 5.6 NS (mg/L) MW-27 (Class Chloride (mg/L) 38 NS III) Sulfate (mg/L) 462 NS TDS (mg/L) 1075 NS Gross Alpha minus Rn & 2 NS U (pC ilL) MW-28 (Class Chloride (mg/L) 105 NS III) Field pH (S.U.) 6.1 -8.5 NS MW-29 (Class Field pH (S.u.) 6.46 -8.5 NS III)2 MW-32 (Class Gross Alpha minus Rn & 3.33 NS U (pCiIL) III) Field pH (S.U.) 6.4 -8.5 NS Notes: GWCL values are taken from February 15,2011 version ofGWDP. NS = Not Required and Not Sampled NR = Required and Not Reported NA = Not Applicable Exceedances are shown in yellow Ql 2011 Results January March 2011 2011 Q12011 Q12011 Monthly March 2011 Sample Monthly Sample Result Sample Monthly Frequency Sample Date Result Result Date NA 2/2112011 6.78 NS NA Semi-Annually NA 2/9/2011 6.13 NS NA Semi-Annually NA 1.78 NS NA Semi-Annually NA 2110/2011 1.41 NS NA Semi-Annually NA 5.73 NS NA Semi-Annually NA 6 NS NA Semi-Annually NA 46 NS NA Semi-Annually NA 2/9/2011 455 NS NA Semi-Annually NA 1090 NS NA Semi-Annually NA 0.7 NS NA Semi-Annually NA 2114/2011 114 NS NA Semi -Annually NA 5.69 NS NA Semi-Annually NA NS NA NS NA Semi-Annually NA 2/9/2011 1.5 NS NA Semi-Annually NA 5.99 NS NA Semi-Annually o Values shown in parentheses are results from resampling of the 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 1. Denison's management review of groundwater QAlQC identified an error in the checking spreadsheet for field pH. Correction of the spreadsheet resulted in corrections to some field pH entries in Q 1 through Q4, 2010. No other analytes were affected. Fourteen of the corrected pH values remained within compliance limits and have no effect on the above table. Ten pH values in five wells which were not previously reported as exceedances have been identifed as exceedances in the corrected table. All five wells were already in accelerated monitoring status. Seven pH values in five wells which were incorrectly reported as exceedances have been identifed in the corrected table as being in compliance. The remainder of pH values in all wells for the 4 quarters were either unchanged or did not result in a change of complaince status after the corrections. It should be noted that per Denison's letter to DEQ of January 31, 2011, GWCLs for pH are under re-evaluation and proposed revised GWCLs will be submitted to DEQ on or before June 30, 2011. Any pH exceedance reported in previous exceedance tables for Q1 through Q4, 2010, or the corrected table above, may no longer be an actual exceedance following implementation of new GWCLs. 2. Based on the corrected spreadsheet results, pH in MW29 was outside compliance limits in Q4 and accelerated (quarterly) sampling should have begun in Ql, 2011. However, the spreadsheet error and changed pH entry was not identified until Q2 2011. The well is currently on accelerated status. 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, January 2011 Tab C2 Field Data Worksheets Accelerated Monitoring, March 2011 Tab D Quarterly Depth to Water Tab E Laboratory Analytical Reports -Quarterly Sampling Tab F Laboratory Analytical Reports -Accelerated Monitoring Tab Fl Laboratory Analytical Reports -Accelerated Monitoring, January 2011 Tab F2 Laboratory Analytical Reports -Accelerated Monitoring, March 2011 Tab G Quality Assurance and Data Validation Tables G-1NB G-2 G-3NB G-4NB G-5 G-6NB G-7NB G-8NB G-9NB G-I0 Field Data QNQC Evaluation Holding Time Evaluation Laboratory Temperature Check Analytical Method Check Reporting Limit Evaluation Trip Blank Evaluation QNQC 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 l' jJ r( II r" .,,:;;~ #'7 I!.,f II ' " II II /I ~ //..-" ~~I ~=~- " ,I " " ,I ~: 32 I' [' II ,I II II II II II I • M~.21 II II II \\ ~ ~ ~ ~ ~ ~-- 0 SCALE IN FEET EXPLANATIQN MW-20 • perched monitoring well TW4-19 0 temporary perched monitoring well PIEZ-1 perched piezometer Ii TWN-1 temporary perched nitrate <> monitoring well TW4-26 temporary perched monitoring well ~ installed May, 2010 MW-34 perched monitoring well installed -<>-August/September, 2010 PROPERTY BOUNDARY \\ \\ \\ II II II II II II II ~ MW-01 • ~S ~ .. o TWN-7 MW-02 • Mw-hs -9-1 I 1/ II (( --::: ~3 h MW-- _ MW-34 M~--9--9-__ • MW-03 • MW-20 • CELL NO.1 CELL NO.2 MW-17 • 33 MW-18 • o TWN-18 o TWN-3 o TWN-6 o TWN-8 o TWN-1S o TWN-10 o TWN-9 PIEZ-1 .. MW-19 • ".4f PIEZ-3 .. OTW4-1fbTW4-11 OTW4-13 QlW.4~ TW4-7~a-8 OTW4-1 TW4-23 o OTW4-40TW4_14 OTW4-6 *TW4-26 o TWN-11 o TWN-14 PIEZ-4 .. ,6'/k"::::::--=--=-.:='=--=- ~7 /7 * PIEZ-S " T37S T38S .. , ......... - , \"''-J #~===~ 4-======~~~~~7/ ';:: ~ --=..-=.. -=.. -=.. I ~~ 4' II- ...... ~ .....:;,..-::::.- 3000 f wildlife pond HYDRO GEO CHEM, INC. APPROVED SJS MW-22 • /1 # # # # # # # # # # SITE PLAN AND PERCHED WELL LOCATIONS WHITE MESA SITE DATE I REFERENCE Ql 2011 H:1718000/may11/welloc10.srf ~ ~ Cl ( ~ " FIGURE A-I TabB Field Data Worksheets Quarterly Sampling Mill· G~ounc;lwater Discharge Permit ) Date: 03/22/2010 Rev. 6 • Groundwater Monhoring Quality Assurance Plan (CAP) ) I ! I OENI50J)~~ ATTACHMENT 1 WHITE MESA URANIUM MILL Attachment 1 . .., See instruct ion MINIiS FIELD DATA WORKSHEET FOR GROUl\"I) WATER Description of Sampling Event: ! f ~I 0\1.&.\ t ~r Crrl>\MtA Wat-e.r ;tC.1I Sampler Name Location (well name):! MW-2. and initials: ! -r.,(lI'lU Ho ll :tA({~/"f 11 Date and Time for PurgingJ ~ :l.11t.f /4blll and Sampling (if different) L.....,;;/V'.:.,./.;..LA"--_____ ...... Well Purging Equip Used: ~ pump o@bailerWellPump(ifotherthan Bermet) I.,.......;Q~t:_O ____ __J Sampling Event I QWhr \s.rI, &\0 Prevo Well Sampled in Sampling Event IL..-M_W_,_.?_3 ____ ---' pH Buffer 7.0 7.0 pH Buffer 4.0 ~.O Specific Conductanccl.-I _'l'-'s ... q __ -->II-lMHOSI cm Well Dcpth(O.Olft): Depth to Water Before Purging/ Ie q T) Casing Volume (V) 4" well:\ ):;l...t.l1:> \(.653b) 3" Well: 0 (.367h) '--~-----' Conductance (avg) pH of Water (avg) Co.76 Well Water Temp. (avg) I i 3.Li1 Redox Potential (Eh)lt.. ..:..;13:::....'1""--_ ...... .1 Turbjdityl,-~c~_ ...... Weather Cond. Ext" Amb. Temp, °C {prior sampling event)1 -3\ Time I Oq~ I GaL Purged I 2'1. ~) I Time I 0'l:1'" I Gal. Purged I ~. II I Conductance 136~ I pHI b b'l I Conductance I :Y~~ I pH I b·68' I Temp.oC I ).:) '-\1 I Temp. DC I 13 . '::ih I Redox Potential Eh (mV) I Ij:J, I Redox Potential Eh (mV) I i (i I Turbidity (NTU) I 0 I Turbidity (NTU) I 0 I Time I o ttY7 I Gal. Purged I 2.S .';> 8' I Time I Oll'~ I Gal. Purged I 9lS . be, I Conductance I ~!:i9 I pH I 6 70 I Conductance 1 .3~~g I pH 1613 I Temp. DC I 13,Y~ I Temp. DC I I\."I ~ I Redox Potential Eh (mV) I ,~~ I Redox Potential Eh (mV) I 1~'Z I Turbidity (NTU) I 0 I Turbidity (NTU) I 0 I White Mesa Mill Field Data Worksheet lor Groundwater -" 1 012 capturx' CO"~"TIIC! WITH/"'_tfr-'UNCT'O .... LITY MIIl-G.r,ourviwater Discharge Permit Date: 03/22/2010 Rev. 6 • Groundwater Monitoring Quality Assurance Plan (OAP) Volume of Water Purged I ;>"~.DL\ Pumping Rate Calculation Flow Rate (Q). in gpm. S/60 = 1-1 ...;.t' 6;.;..\ ...... 1 __ ---1 gallon(s) Time to evacuate two casing volumes (2V) T = 2V IQ = 1 II Y ,7 1 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 Lobt1.....:.~....;/.:...;.I.\-=--_____ -J Sample Taken Sample Vol (indicate Filtered Preservative Preservative Type of Sam pic if other than as Type Added y N specified below) Y N Y N VOCs 0 0 3)t40 mJ 0 0 HCL 0 0 Nutrients 0 0 lOOml 0 0 H2SO4 0 0 Heavy Metals 'P' .... 250 ml l&-n HN03 mr 0 All Other Non Radiologics 0 0 250ml 0 0 NoPreserv. 0 0 Gross Alpha I ~~ -EI 1,000 ml ~Im .n HN03 ~& -U Other (specify) Jig--0 Sample volume 0 FWI 0 -riI - ~ ffprcscrvativc is used, specifY Type and Quantity of Prescr\'atiYe: -Comment ~ .. See instruction '" Ar r'\J~c). ()" ~1c.. ,J 07:51.\ -r~Ylt'l<.r'" Hol\.4~,\pr<,scflt ·r~(' FV.(~<!.. a.11'\ ~A/'np /.V -e ven t. PIAf'~e. b~o.~ ~t ollie · -p~~ed. We\1 'tel" ~ +O.{",1 0+ }.;.7.0 Jvllnc.A+~. w,,\, ...... wo-~ fY\o.sJ.l~ d.::ur t~ro~h6.....\ fU,(j<' fu.\j c." e.nAC!J. qn4 S.afYIf 1< Wqj c:oll~c.J~ <i}- O'i'io &rthS 41f~1\ wa.~ ~h< 0/'1 b ~""'pk <c.lle!:tc:d. O~p~l. ·ft. L..X.:h:r c..~,.. pLAr~L vJo\,~ ll&5C Le.\'.\-~I~k 0..-+ OqYb L--_______ ---I]Oo not touch this cell (SheetName) White Mesa Mill Field Data Worhheet for Groundwater .A 20f2 capturx' COM.ATIBLE WITH,;""'-,-w-rUNCTIOHALITY Mill-Groundwater Discharge Permit Groundwater Monitoring Quality Assurance Plan (QAP) ATTACHMENT 1 WHITE MESA URANIUM MILL Date: 03/22/2010 Rev. 6 Attachment 1 ~ See instruction OENISONI) ~ MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: I l!'T Qv.o..rtu" &f'Ov..fl~ Wu-~e.( ;10 II Sampler Name Location (well name): .... I_......;M......;\.IJ_-_3'--________ ~ and initials: I ....,-o.nl'lc:r l-Jo J1;J~ .!:l!rJt Date and Time for Purgin~ ;}../ IS / ;2.011 Well Purging Equip Used:~pump o@ bailer Sampling Event Q ",o.f'*-e..r'~ (,-vJ pH Buffer 7.0 -,.0 Specific Conductance .... 1 _q......;'l...;q ___ ...JIIlMHOS/ cm Depth to Water Before PurgingJ Z3 . .30 Conductance (avg) and Sampling (if different) 1L...:~_/)J~ _____ -1 Well Pump (if other than Bennet) ,-I ......;Q..:...;m-=-____ --' I MW"3}} Prevo Well Sampled in Sampling Event .... _______ ---1 pH Buffer 4.0 4.0 Well Depth(O.Olft): , Q7.0 0 Casing Volume (V) pH of Water (avg) 4" well :~-.=---:;:-1) =---iI(.653h) 3" Well: . .s. O~ .(.367h) Well Water Temp. (avg) I H .~~ Redox Potential (Eh) I ::L~S Turbidity ''----'=0=-_-' Weather Condo Ext'l Amb. Temp. O( (prior sampling event)I -::2. 6e. Time I }O30 I Gal. Purged I 'l.3b I Time I 10,31 I Gal. Purged I 4..5 "-I Conductance I :S{S3~ I pH I G,·II I Conductance I S8'34 I pH I ~_O'l I Temp.oC 1 14.3'\ I Temp.oC I lQ.3:.J.... I Redox Potential Eh (mV) 1 ~qq I Redox Potential Eh (m V) I ;;rzf.3 I Turbidity (NTU) I 0 I Turbidity (NTU) I 0 I Time I 103..£-I Gal. Purged I ~.]1 I Time 11033 I Gal. Purged I <f. '1 [( I Conductance I S '333 I pHI &,O'g 1 Conductance I 583L5 I pHI 15 .~~ I Temp.oC I )!1.d..g I Temp.oC 11Q·39 I Redox Potential Eh (mV) I .;l.~3 I Redox Potential Eh (m V) I ;rq;;J. I Turbidity (NTU) I 0 I Turbidity (NTU) I 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 I '0. LJ D gallon(s) Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = I . :;tD~ Time to evacuate two casing volumes (2V) T=2V/Q= I Qg.34 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~,-_M_'/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 0 0 3x40 ml 0 0 HCL 0 0 Nutrients 0 0 100 ml 0 0 H2SO4 0 0 Heavy Metals "KI 0 250ml '£] 0 HN03 "tl 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) 19 0 Sample volume 0 IE 0 ~ t='O~f;a~ If preservative is used, specify Type and Quantity of Preservative: r, See instruction Comment Arl":\ld 0'1' s:+e. 0\+ ot;40. \ ... nn~( Hl>n;~~~ ?r~f\+ ,*'or p\llr~-=. 6.(l J. .so.mf)'l~ -e"en+. F"'r~.e.. b-e~6.fI 0..+ O'lt.tS. Pur~(:a. 'N ell ~Qr ~ -tb-t~1 cR ~Q t--\\(lv\te.~. W6"t-ct' \.)~ G\~/).... +~r bU~O"'-1-p \)..('~~. ? \A(~(. ~nJ ~ Ck"'~ 5~ YY\ P l~.) v::> e re Loll t: ch~o. 0..1-I 03,S. 'O cp+~ ·h, V-:)""t-Gl o...\\-~(' r"'r~e. ~o..~ ~7.~O L~~ ~~tc. O-.~ \0'11 '--_______ ---'IDo not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater 2 of 2 ~iII-Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAPI i i f ATTACHMENT 1 OENISO,/)J ~ I WHITE MESA URANIUM MILL Attachment 1 ';, Sec: iU5ltUciion MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: I \ ~T GN.o-Me.(' &rov.. ,," \.00--t<!.(' :;;to 1\ Sampler Name and initials: I '"'TO,1\f\cr HaJl ;J~/rH Location (well name):L.-'-!...H~W=--_3~A!-.-_______ --..I Date and Time for Purgin~ .?-./IS/;l.OI \ and Sampling (if different) 'w:;U;.;;:....:..J~b/~;)..O~I .:.....1 ___ --l Well Purging Equip Used:~pump o@ bailer Sampling Event 'Q",,-o-('-\-c:.r\.~ Cr w pH Buffer 7.0 /.0 Specific Conductance .... ' __ '1..:..!l-.;'\-'-_--III-IMHOSI em Depth to Water Before PurgingJ ~E> 3D Conductance (avg) kl44 Well Pump (if other than Bennet) Prevo Well Sampled in Sampling Event L..I_M_W_-_18 ____ -1 pH Buffer 4.0 . Well Dcpth(O.Olft): I 'is.00 Casing Volume (V) 4" Wel1 :~(.G53h) 3" WeU:u:::==J(.367h) pH of Water (avg) Well Water Temp. (avg) I I ~ 'M Redox Potential (Eh) .... ' .... 3""'Ci4"""--_ ....... TurbiditylL-......;;.:. 5""-_-1 Weather Condo Ext'l Amb. Temp. O( (prior sampling event) I -;tf. ... Time , oqa.S I Gal. Purged I ~:;J.. I Time , O'l':<b I Gal. Purged , g 5;), I Conductance I b 14l.{ I pHI f, 0, I Conductance I Co\4r I pH I Co D-S I Temp. DC I \1.\ \9 I Temp. DC I 14.lY I Redox Potential Eh (mV) [ '30~ I Redox Potential Eh (mV) I ;>o~ I Turbidity (NTU) I s I Turbidity (NTU) I • .>-I Time I 0921 I Gal. Purged I ~ .1':2 I Time I O'i~8' I Gal. Purged I ~.9~ I Conductance I bl ~1 I pHI C; OS I Conductance I blLl5 I pH I ~.o __ ; I Temp. DC I 14 n I Temp.oC 1 1~¢3 I Redox Potential Eh (m V) I ~Oj I Redox Potcntial Eh (mV) I 31Q I Turbidity (NTU) I 'c:~ I Turbidity (NTU) I .S I White Mesa Mill Field Data Worksheet for Groundwater .A 10f2 capturx' CDM.A"'~E W'TH ......... _ri:r--.U.tT'oN."n I ~ill· Grou'!dwater Discharge Permit DatI!: 03/22/2010 Rl!v. 6 Groundwater Monitoring Quality Assurance Plan (OAP) Volume of Water Purged ,-I ...J.L.:....I ....:.~~~ __ ...J gallon(s) Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = 1 . ').06 Time to evacuate two casing volumes (2V) T"'-2V/Q= I ~O.qO I Number of casing volumes evacuated (if other than two) L8D If well evacuated to dryness, number of gallons evacuated Name of Certified Analytical Laboratory if Other Than Energy Lab~,-....;..,v._z....:..f\ ______ -J Sample Taken Sample Vol (indicate Filtered Preservative Preservative ~ • ~ :l . Type of Sam pic VOCs Nutrients Heavy Metals All Other Non Radiologies Gross Alpha Other (specifY) Sv. '-t~~f 'IDS y 0 0 ~ 0 0 ~ if other than as N specified below) 0 3x40ml 0 100m) 0 250 ml 0 250m! 0 1,000 ml 0 Sample volume Type Added y N Y 0 0 HCL 0 0 0 H2SO4 0 Ii:! 0 HN03 E[ 0 0 No Preserv. 0 0 0 HN03 0 0 Ii] 0 Tfprcscrvativc is u.~cd. specity Type and Quantity of Preservative: ~ See instruction ~Comment Arr.-.)<4 .:)1\ ~.~< 1.1.4 OJ)LlD -("'I\(\~" HdhJ~ ~"ITti.:J\'1 ,for r"r,,~ alJ~ .s4"'rh~ event ?v.r~o: be'~n c.o.~ c!S'i.'i. A5 '>OM 6..S :r .s~w t='o~ ~",\-~ aec.rc~;~ J: toc;.~ t.t ;SC:+s of' f>ttC'o.M.e.t<.("~ Pv..r~ea \0dl .\01' ~ htol.l of ~ M.nv.to v,,1\\,1 ltJe II R~n D r,j I, Pv.(~e cndeJ. IXt 0'1'"10 N 0 0 0 0 0 [j \0,,~c(' \.V~ d~o..l"'~ Dc:r~ -1-0 \..:)c.J·u o...\.Tc(" pv...~,<::: \.u~~ 'fl .~<i Lc.~t sJe "t-Arl"'uc:!~ on sd·<; ""t iOOO U .MU Hoil .a"i prcs.!,rt +" C.oHa+ .5ti.rVlpl1!.5 '()cpt~ +D \,o)qicr (....XI.s t.5 8~ Sc.M?I~ t0erc pv..lI<.J. ",t IOO.s Ler~ ~;+c. ",t Jooq '-_______ --'100 not touch this cell (SheetName) White Mesa Mill Field Data Workshl!et (or Groundwater .A 2012 capturx' CO"~AT"L' \¥ITH~""""W--'UNCTU)NA'ITY Mill-Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) I ATTACHMENT 1 I OENISONI)~~ WHITE MESA URANIUM MILL Attachment 1 See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: \ ST QlAArt((" &1" DlAnJ W", ie'; ~o 11 Location (well name):l-' -=M--.:...-vJ_-.....;;.5~ ________ ---l Sampler Name and initials: ,:::r;.I1Yl ~ r 1-] 0 II:J ~ /-r» Date and Time for Purgin~ ').../1 Li/ ~Ol \ and Sampling (if different) O'--:'#....I.'I""'A:L...-. _____ ---' Well Purging Equip Used: [![]pump o@ bailer Sampling Event Q",o.rt-c"'8 <rW pH Buffer 7.0 7_0 Specific Conductance .... ' _-,'1-"'~-L' __ ---II ~MHOSI cm Depth to Water Before Purgin~ ) ob.3S Conductance (avg) Well Pump (if other than Bennet) , Qf..D Prevo Well Sampled in Sampling Event IL....-M_W_-~_~ ____ --J pH Buffer 4.0 Well Depth(O.Olft): , 13g.5 b Casing Volume (V) pH of Water (avg) 4" well:1 ~O·~'l 1(·653h) 3" Well:L.... _() __ -J. (.367h) 7.31 Well Water Temp. (avg) , 14 .~S Redox Potential (Eh) , :f... \..\ J Turbidity' \ 6.9... Weather Condo Ext'l Amb. Temp. DC (prior sampling event)1 0 0 (. Time , 13\S I Gal. Purged , '-\;;2..31 I Time I 1-3}~ I Gal. Purged , LJ:1 .,&3 I Conductance I ~)~4 I pHI 7 .~:l.. I Conductance I :!> )'1~ I pHI 7·31 I Temp.oC ! Iq·,:)!;; I Temp.oC I \'1.3b I Redox Potential Eh (mV) ! ;;LSD I Redox Potential Eh (m V) ! ~q j I Turbidity (NTU) I 16.~ I Turbidity (NTU) l lk·:..z. J Time ! 1::)1'7 I Gal. Purged ! :l~,J~ I Time ! 1~1 8 I Gal. Purged! q;J,. s.(, I Conductance I ~1'1~ I pHI 7.::!\ I Conductance I ~1'1!l: I pH!7.31 I Temp.oC ! 1L\.~9 I Temp.oC ! 1'-l.3Q I Redox Potential Eh (mV) ! 2.14] I Redox Potential Eh (m V) I ~I{S I Turbidity (NTU) I 1 b .'J... I Turbidity (NTU) I lb.1 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 I 1...\3. L] 6 Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = I . ;2.11 gallon(s) Time to evacuate two casing volumes (2V) T=2V/Q= 11Q3.Y'1 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~ .... _N_/. ... I1,--_____ ---, 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 ml 0 0 H2SO4 0 Heavy Metals m 0 250ml E 0 HN03 ~ All Other Non Radiologies 0 0 250ml 0 0 No Preserv. 0 Gross AJpha 0 0 1,000 ml 0 0 HN03 0 Other (specify) 0 0 Sample volume 0 0 0 If preservative is used, specify Type and Quantity of Preservative: Comment Arr:\ld. On s.;+c:. 6,.1-OQ'!;4_ ~n"<r Ho)I:J"J fre.s~fl+ ~,... r"\~c: Q."c.t ~'it"'p}:\j ~n+' ?\A(,~c. be~r'I (}..~ 1000. f'\)..r~t;~ \A)c\\ tor ~ -to1-&..\ rS d..O~ ""\',nv.+c.s. 1..01).:h:r Wfil.~ ~ 1:H\-c. ~:r~. \)c(j hH~ c.blbrt.\i~o"" tl> ~<l.1o·, ?u.~c -cYl~'C~ ~t1A .sc..mpl't lAJ~ Lc>lkdd A-\-1:3;({)_ Oc.pt~ -h WOI.+C( t'lt1(r p4(je vVQ,.S ,.?.~ .:;Zl L~n .5 ;1-t: A-t 13.d.7 L--_______ --IIDO not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater See instruction 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) ATTACHMENT 1 OENISONII) ~ WHITE MESA URANIUM MILL Attachment 1 I~ See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: Gv.o..f'T(J'l -a CrrO\N\J. WA1-<.,r ~O 11 Location (well name):1 ~W -\' ~----~----------------~ Sampler Name and initials: I --'-;;"n~r H oll.·cI~?! Jnt Date and Time for Purgind -;).../ a...1 ;;1.01 \ and Sampling (if different) "N/.t\ ~--~----------~ Well Purging Equip Used:@Jpumpo@bailerWellPump(ifotherthanBennet) LI --=Q:J...~!:.....!:D::....-______ --.J Sampling Event 1 Qv.o..rt-c.rl~ 6-W ~(:)I) Prevo Well Sampled in Sampling Event 1~_M_W_-_3_0 ________ --, pH Buffer 7.0 7.0 Specific Conductance 1-1 ___ ~_q~ ______ ~1 f,lMHOS/ cm Depth to Water Before Purgin~ g~. n Conductance (avg) pH Buffer 4.0 11·0 Well Depth(O.Olft): 1 J30.D~ Casing Volume (V) pH of Water (avg) 4" well:1 ;;lb-b~ 3" Well: b 7.YK 1(·653h) (.367h) Well Water Temp. (avg) 1 13.37 Redox Potential (Eh) 1L.,?:_L._ly __ --.J TurbidityLI _O __ ----J Weather Condo Ext'l Amb. Temp. O( (prior sampling event) 1-17 0 ( I Time 1 1&% I Gal. Purged 1 'S~.H.c:> I Time I Id-YCo I Gal. Purged I S3.38' I Conductance 1 ·?3S~ I pHI 7.Lj~ I Conductance I ?"'~bO I pH I 7-L'lq I Temp.oC 1 1:;,":~A 1 Temp.oC Il ~·31 I Redox Potential Eh (mV) 1 ,?.L19 1 Redox Potential Eh (m V) I5:Y Y I Turbidity (NTU) 1 Q 1 Turbidity (NTU) 1 0 1 Time Il~Y' 1 Gal. Purged 1 "s"2.,.S~ 1 Time 1 \a..Y8 I Gal. Purged I 'Y>. 1:) \ 1 Conductance 1 ~C;;K 1 pH 1 7 ·147 1 Conductance 1 ~bj I pH I J .147 I Temp.oC 1 13 ·3Q I Temp.oC 113.'--1 0 1 Redox Potential Eh (m V) 1 .?'-/~ 1 Redox Potential Eh (mY) 1 ~ q 0 I Turbidity (NTU) I a I Turbidity (NTU) I Q 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 I SL\ .AS Pumping Rate Calculation Flow Rate (Q) in gpm. S/60 = I • ~n gallon(s) Time to evacuate two casing volumes (2V) T=2V/Q= I ~Y5·\.j3 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~ AWAL 1 S~+ of vOC.S 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 3x40 ml 0 ~ HCL ~ Nutrients ~ 0 100 ml 0 I!i H2SO4 ~ Heavy Metals ~ 0 250 ml [3 0 HN03 ~ All Other Non Radiologics ~ 0 250 rnl 0 I;ZI No Preserv. 0 Gross Alpha 1)1 0 1,000 rnl I!I 0 HN03 1)g Other (specify) En 0 Sample volume 0 [j 0 ~t'o..\ \Y\or~I\'~ If preservative is used, specify Type and Quantity of Preservative: See instruction Comment Af'r"~ca 'bYl ~:-\-<.. 0..1 o~30 . "'Te..nM,. o.n~ ("",r6r"1 fr~5.-GI\~ tOI'" f'Ui":J-e. o.l"\d .sc:.Mpll·(\~ e\JCJ1¢. r\,,('~c b~~Qf\ o..q. 0$54()' P"'r~<.t\ vJ~n ~r '" -:totc),) ~ d-.SD fv\:Y\v..tes . V0cA.~-c(' w~ C\-z:oJ ~hiOV-~ho~ 'P\).(~G. ?\)-r~(,. GY\tl.e~ O-Y\vl S~M?I<J 'vO<'fz LD\\d.1-<d. #,}-);GD. D~htc:, \.0,,-~<{' lA9rC( ?v,.(~/!: 0£AS. 39.~S \....Sf ~~\(. Q....\ \30\ '---________ ....JIDo not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater N 0 0 0 ~ 0 ~ 2 of 2 Mill -Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) I ; ()ENISONI)J~ ATTACHMENT 1 WHITE MESA URANIUM MILL Attachment 1 [(j See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: II sT QW>.l"ter GroW)J\ \/JOI. -tcr ~ \ 1 Location (well name):L-1 _""_w_-_l_:J. ________ ---' Sampler Name and initials: F1::Mne.f" Hol1,~~~/l1t Date and Time for PurgingJ1-;;2._-1_4_-_;l.._O_I_' ___ --' and Sampling (if different) I ~/ IS /.9D II Well Purging Equip Used: [IDpump o@ bailer Well Pump (if other than Bennet) I,--Q_~_D ____ -, Sampling Event I Q\MM"tcrb Cy.J pH Buffer 7.0 Specific Conductance L..I -..:..4 4"':"~"--__ ---I1 ~MHOS/ cm Depth to Water Before Purgin~ 109. S D Conductance (avg) I ~w-S Prevo Well Sampled in Sampling Event L-_______ --' pH Buffer 4.0 Well Depth(O.Olft): L-ll_3_0_,L.:_l __ -, Casing Volume (V) pH of Water (avg) 4" well:I IY ·30 1(.653h) 3" Well:L-. _o __ -J.(.367h) 6·y Well Water Temp. (avg) I \Y.51 Redox Potential (Eh) L...;I a;"";,,,....;./...:...1 _--' TurbidityL-1 _7_, 'i __ -, Weather Condo Ext'l Amb. Temp. °C (prior sampling event)l 11 0,- Time I 13()C> I Gal. Purged I I'?> .'-l~ I Time I 130J I Gal. Purged I U.~ . bb I Conductance I Y,:2.bD I pHI b,3~ I Conductance I LP.~q I pH I b.3 '} I Temp.oC I '\.~.3 =, I Temp.oC I lQ·3i I Redox Potential Eh (mV) I ;),.7d-.... I Redox Potential Eh (mV) I d-7iJ-. I Turbidity (NTU) I 7 .g I Turbidity (NTU) I I '~ I Time I 13 ()9--, I Gal. Purged I \~.81 I Time I 1303 I Gal. Purged I I~.oq I Conductance I q;z.b5 I pHI b .3~ I Conductance I 1...j.;l,~3 I pH I b ·r:13 I Temp.oC I 11...1.3] I Temp.oC I P=1. 3t: I Redox Potential Eh (mV) I ~71 I Redox Potential Eh (m V) I d-.IO I Turbidity (NTU) I 7, Cj I Turbidity (NTU) I 7.~ 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 ;;t~ .£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 /31.80 I Number of casing volumes evacuated (if other than two) \,74 If well evacuated to dryness, number of gallons evacuated Name of Certified Analytical Laboratory if Other Than Energy Lab~L-_-v._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 0 0 3x40 ml 0 0 HCL 0 0 Nutrients 0 0 100 ml 0 0 H2SO4 0 0 Heavy Metals 'EI 0 250ml E 0 HN03 1:J 0 All Other Non Radiologics 0 0 250ml 0 0 No Preserv. 0 0 Gross Alpha 0 0 1,000 ml 0 0 HN03 0 0 Other (specify) 0 0 Sample volume 0 0 0 0 If preservative is used, specify Type and Quantity of Preservative: See instruction Comment Arr:\Ieo. on site 01,1 113D. I'o.nn<.t-H~ H;cl.~ ~r~~'Cn1 ~r ?\).~c 41'1~ ~~Mpl i ~,\ el.lc'f\t· ?v.r~-c.. h~1),1] O\.-t '\3.5. Kf\o~;~ -the:. well 1.0c>u.\,)" f IA.I'\ tAr~ "L otook. L\ S~ 6f ?"'i~1YIC.~'(~ ()..f:> .sbOl\ "'~ 1. nohc~ 1=10\.0.\ r",-t< ~of'.t:.rc:.~;~I\' fv..r~Gb.. \..)c.l\ -fD. IA..~J(.J J; ns M\nlA~(.":>, l'v.("~~ \1:)-<::\\ t1.~ Dc::f-th 'h, ~oc\U' Q..~'r f~~C. ~ ~ . .s,. l~~ ~;+<. ~+ 1.3~ f'v.~<:.. cnJ.c~ ~ l~C>· Arr;\l<b, 0/\ ..s;tc.. ~t ol~4, --rb../lnt:r rlDI1;J,,\\ f>rG5e..d-J..o ('ollc:c.1-.,5Ql'l1fJe. Oept~ -k \,o.)fA1,r b~torc.Sf.l,Mf\G WCi~ \O~.ll . S6\Mpk ,o\kc.1~d lA.1-Ol-5D. Lc:..\t .,s;h ~+-1::,7.5", L..-_______ ----IIDO not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater 20f2 Mill-Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (OAP) OENISO ATTACHMENT 1 WHITE MESA URANIUM MILL Attachment 1 I ,} See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: I I ~T QV\J)o..rTe.r GrC)lA1\J\ W <1\ Of <f ~ D, \ Location (well name):L-I ----'...M_W-'-"-_-1-14.:....-_______ -----' Sampler Name and initials: I-r;",(\(.r Htlll.~",'c1/'J.l Date and Time for Purgind ~/7/:;l..t>1\ and Sampling (if different) Well Purging Equip Used:@]pump or@] bailer Well Pump (if other than Bennet) Sampling Event I Qv.o..(',,"v1 ~ b-W U, \ I ~W-~S Prevo Well Sampled in Sampling Event L--_______ ---I pH Buffer 7.0 7·0 pH Buffer 4.0 '-LO Specific ConductanceL...1 _~:.....;q....;.'1 __ --Ih.lMHOS/ cm Well Depth(O.Olft): I ,~g.7C Depth to Water Before Purgin~ I 03.]Q Casing Volume (V) 4" well:1 10,?-,~ 1(·653h) 3" Well: Q (.367h) L-~_----' Conductance (avg) Y035 pH of Water (avg) Well Water Temp. (avg) I \"'1> .~,-\ Redox Potential (Eh) I '-_l _CO_g_----I Turbidity ...... 1 _0 __ --' Weather Condo Ext" Amb. Temp. °C (prior sampling event) 1-JOe Time I llS!) I Gal. Purged I 33.b3 I Time I I~b I Gal. Purged I 33. SS I Conductance 1 I..\D37 1 pHI b.X( I Conductance 14635 I pH 1 CO·:G I Temp.oC I 13·q3 I Temp.oC I 13.q5 I Redox Potential Eh (m V) I \7C I Redox Potential Eh (m V) I lb~ I Turbidity (NTU) I 0 I Turbidity (NTU) I b I Time I 1;;23 7 I Gal. Purged I 31..). 0 6 I Time 1 1~8 I Gal. Purged I 3Y . ~ <a I Conductance I:iD3~ I pH I b·:;l,3 I Conductance I Y035 I pHI b.x;( I Temp.oC I \;).93 I Temp.oC I 13-'33 I Redox Potential Eh (m V) I lb~ I Redox Potential Eh (m V) I l~ I Turbidity (NTU) I Q 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 3\..\'7~ Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = I ~ ;l'y7 gallon(s) Time to evacuate two casing volumes (2V) T = 2V/Q = I jt-\q .Cll 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~ /tINA L I ~ d of V OC.s 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 3x40 ml 0 ~ HCL fZI Nutrients ~ 0 100 ml 0 rlI H2SO4 ~ Heavy Metals ~ 0 250ml rn 0 RN03 ~ All Other Non Radiologies ~ 0 250ml 0 rlI No Preserv. 0 Gross Alpha rn 0 1,000 ml tB 0 RNa 3 ~ Other (specify) [] 0 Sample volume 0 m 0 (,-"<:;n~.rC\\ -:I:n or~o...fI; c.S If preservative is used, specify Type and Quantity of Preservative: Comment l / ,I, See instruction Af"r ;'\l~o.. 0\'\ ~;-\-o:=. "'+ \011 . I~n nu ~o)\;dG\.J i~ ~re.s<.rd· f~r pw~~ ~I"\~ .so..tv1p1:~ -e..v~n+. Pv-('~c:... be~o..1\ ~+ \b~O . ~\"r~~d.. We-I \ ~or '" -toto..\ o-t I '-0 Min", tes . Wo..ter LUo..~ c..\-eo..'C' i1,l"ov..<fc>\,).~ ?\A\~e. P\'\1"~~ e.nJed. ~(I~ So..rYlfks L0ef'~ (.oll~G+ecJ. 11>.-t-1300 . Left ~'t"<. oj· 1.3)). D~f'th +0 WG\.-t(r o...-\1c::r ?\}\r~~ \.0a.~ IOY.I~ L....... _______ ----IIDo not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater N 0 0 0 ~ 0 EI 2 of 2 Mill • G~dwater Discharge Permit Date: 03/2'1./2010 RtV. ~ ~ater Monitoring Quality Assurance Plan (UAP) I ! , i I t OENISON'l J MINES ATTACHMENT 1 WHITE MESA URANIUM MILL Attachment 1 See illstruction FIELD DATA WORKSHEET FO}t GROUND WATER Location (well name): .... 1 _--J.M-:..:.;W~-~I~~ ______ --J Sampler Name and initials: I'''f~t'ln-er I~Gl\ ,J'~/'--n Dote and Time for Purgind J./I!?/;).,O I , and Sainpling (if different) N/-l Well Purging Equip Used:OOpump o@ bailer Well Pump (if o~her ihan Beunet) I QED Sampling Event I Q",,,,,A'~"'\':lC-vJ Prevo Well Sampleclin Sampling Event I .... ~M_W_: ~_l_~_~:-'-_--' pH Buffer 7.0 7.0 Specific Conductance .... 1 __ 'l.:..4.:..'\"'--_--'I~MHOSI em Depth to Water Before Purginsl "70. 3S I Conductance (avg) pH Buffer 4,0 y ·o Well Depth(O;Olft):. ,I 13li.OO Casing Volunle (V) 4" Wel1:141.5f> 3" Well:. 0 pH of Water (avg) I 1 (·G53h) .(.367h) Well Water Temp. (avg) 1"\ If!. Redox Potential (Eh)1 26~ .1. Turbidity ...... 1 ....:..\-=.()~_ ...... Weather Condo Ext'l Amb. Temp. °C (prior sampling event) I ;, 3~ Time I 14$-I Gal. Purged I 83 ... s: I Time I 14310 I Gal. Purged I 8'>« ff I Conduct~nce I ~:'~9 I pHI Co ,:t,'=. I Conductance I ~.5~O I p,H I b :¢7 , I Temp.oC I i;>.ii> I Tenip.oC I \3:17 1 Redox Potential Eh (mV) I .20~ I Redox Potential Eh (m V) I ¢Pq I , .. Turbidity (NTU). I \.D I Turbi4i~ ,(NTU) ., \.0 I . , .. Time I J~37 I Gal. Purged 1 15: 5'. 1 1 Time i Iti38 . 1 Gal Purge~ r K'I" 2. .J Conductance I ~tfO 1 pH I (".,..~'J 1 Conductance I ~".I , I pH 1 to. ;).7 J .. Temp.oC I i:;'·'1t) I Temp.oC 113.7'1 I Redox Potential Eh (mV) I :lo;;t. I Redox Potential E~ (mV) I ~t> I Turbidity (NTU) I l.Q I Turbidity (NTU) I 1.0 t ' .. ' . White Mesa Mill Field Data Worksheet for Groundwater .A 10f2 capturx· COM'Ulno "'iH/,"_~'UHCT'O"ALITI • Mill· G~oundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAPI Volume of Water Purged I $4. f,,3 Pumping Rate Calculation Flow Rate (Q), in gpm. SI60 "" I . :;>.1] gallon(s) Time to evacuate two casing volumes (2V) T=2V1Q = 1383 .07 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~L-__ N._,/_" _____ --, Sample Taken Sample Vol (indicate Filtered Preservative Preservative Type of Sample if other than as Added y N spccified below) y N Type y VOCs CJ 0 3x40 ml CJ 0 HCL 0 Nutrients 0 0 100mi 0 0 H2SO4 0 Henvy Metals m 0 250ml ffi 0 HN03 iii All Other Non Radiologies 0 0 250ml 0 0 No Preserv. 0 Gross Alpha 0 0 1,000 ml 0 0 HN03 0 Other (specify) iii 0 Sample volume 0 ~ 0 .> v-'.\C\.-\e,. If preservative is lIscd, specify Type and Quantity of IP:, Preservative: See instruction A,..r:\lc.tX 01\ ~ ',+c.. c-~ 08D5 \"',1'!1\~r-\'\oll,J~ f't"ti<n+-\~r 'Pu.~c:: o.n~ ..st.\Mrl;~ e.uent. \'v..r~e.. b5"''' 0..+ D~IO . P v.C'~'Ctl "'.Je.1I ~or CI.. +ot~\ 0.\ :)~() M\l'ttA\-~~. 0, .. :\-<.( \".)i>..!::. d~(" +hr OlA~~ov.\ ?V-'('~C . Yu.rjC cnJ~t.l. ~f'ltl SCi.flllpleS w ·ere. l,..olkdc! ~t 11,40 D Cf'lh +0 L.J~+e~ 6\~(r fW~'( WGl..~ 71 ~~ Ld+ ~I+e. A:~ HSI L..-_______ --I!Do not touch this cell (SheetName) White Mesa Mill N 0 0 0 0 0 rn Field Data Worksheet for Groundwater A 2of2 capturx' CON'ATI_LI W'TH../'--HU'n.-'~"CT'O>lAliTV Mif! -Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitonng Quality Assurance Plan (QAP) ,OENISO.})j~ ATTACHMENT 1 WHITE MESA URANIUM MILL Attaclunent 1 _-j; See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Samplin~ Event: I ,sT Q v..w +u U-r O\J-f\9 -W •. dc:.r ;;"0 II Location (well name):I ..... -=-f..i~w:...-....:.i.....:q'--_______ ..... Sampler Name and initials: I ~l'IIIcr H¢l/:J",,<\/Tlt Date and Time for Purginm ;l.,/:;l./I:z..o l' Well Purging Equip Used:~pump o@ bailer Sampling Event I Q\N).MUG &w pH Buffer 7.0 7C> Specific Conductance 1L..--Lq'f....:.'i..L-__ ...... ! (.1MHOSJ em Depth to Water Before PurgingJ }> I c>;t.. Conductance (avg) \YSl and Sampling (if different) Well Pump (if other than Bennet) Prey. Well Sampled in Sampling Event L..I _______ -J pH Buffer 4.0 y D Well Depth(O.Olft): I J'i'l .OO Casing Volume (V) 4" Well:~(.653h) 3" Wcll:~(.367h) pH of Water (avg) WelJ Water Temp. (avg) I I ~ DE Redox Potential (Eh)1 J,..7Q Turbidity ..... 1 _E> ..... 1..:..' I _~ Weather Condo Ext'l Amb. Temp. DC (prior sampling event) I -?:,o" 1 Time I t':\E I Gal. Purged 1 13~. 37 I Time I ,"'?,..b I Gal. Purged 1 1~.58 I Conductance I j~57 I pH I b.g~ I Conductance I lj~g I pH I b g ~ I Temp. DC I IY 01 I Temp. DC I )~.Q7 I Redox: Potential Eh (m V) I ;;'7 5 I Redox Potential Eh (mV) I :;2.7~ I Turbidity (NUl) I l,;i I Turbidity (NTU) I 5 .0\-I Time I IY;l.' I Gal. Purged I 13)...&0 I Time I Iq;jl.g' I Gal. Purged 1133.0 .:2 I Conductance I l!:te:2 I pH I b7'i ! Conductance I i ~bb I pH I b 71/ I Temp. DC I 14 07 I Temp.oC I 14 ru. I Redox Potential Eh (mV) I J,..S< I I Redox Potential Eh (mV) I .:2£2 I Turbidity (NTU) I ~·i I Turbidity (NTU) I 5·/ I White Mesa Mill Field Data Worksheet for Groundwater A 10'2 capturx' CO."ATI8Ll W'TH..;""--....... rir-FuHCT'ONALIU Min -Groundwater Discharge Permit Groundwater Monitoring Quality Assurance Plan (QAPl Volume of Water Purged I I.?\.~· &:IS Pumping Rate Calculation Flow Rate (Q). in gpm. S/60= I ·.217 gallon(s) Time to evacuate two casing volumes (2V) T ~ 2V/Q"'-I SiS'\, h ~ 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 LabfL..-M=.:....JvA'-'--_____ ~ Date: 03/22/2010 Rev. 6 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 m1 0 0 HCL 0 Nutrients 0 0 100ml 0 0 H2SO4 0 Heavy Melals 0 0 250ml 0 0 RN03 0 All Other Non Radiologies 0 0 250ml 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 Preser.·ative: . ~ !lComment A(/';\J~l on sJl!~..r DI.(Og '~I\f\er N~j(:J40 rrc:.~wt +0 pv..r~e Mw~/'i . P,",r~c:. bC~DJ\ ~~ 0'-\1£>. fo.r~'C~ Well ~r c:... to+" I 0+ bl.5 1V\,nv..tc:.S . W .. +er 1.;)~ d ... r 1-hr ~~o~ f,,~e . p,,(~<. ""jed "t 1~30 D~p+h +¢ Wu.4<.r '\~ef' rv.':3~ ~u.~ S~·I'l . Le.4 .s;·lc. At H3S L...-_______ ........JIDo not touch this cell (SheetName) White Mesa Mill See instruction N 0 0 0 0 0 0 Field Data Worksheet for Groundwater .A 20f2 capturx· COM'ATIBLE W'TH/'" __ /ir--PuNcTloNAL,n Mill-Grouodwiter Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) t>ENISO'/) J: ATTACHMENT 1 WHITE MESA URANIUM MILL Attachment 1 ~' See instruction M INES FIELD DATA WORKSHEET FOR GROUND WATER DcscriptionofSampli~gEvcnt: I 1ST Ci:l VJA.c-kr Crrov..f\J.We...h.r ~¢I l Sampler Name Location (well name):1 M w-~c and initials : 1 ~~Me.r lioll:,)."'j /Tlt Date and Time for PurgingJ\...;;..d-.:....I-=-g..:....;/~=u..:.;I' ____ ....I and Sampling (if different) 1-:1 2::::;;/:-':.;::'-:.:.../.:;..~::.;:;.()~II ___ --I Well Purging Equip Used :~pump o@ bailer Sampling Event I (yv..o.rh.r'~ G-\J pH Buffer 7.0 ,0 Specific Conductance .... 1 ....;q~q<t.:..-__ ---IIJlMHOSI em Depth to Water Before Purgind £.10 Conductance (avg) bT1'~ Well Pump (if other than Bennet) 1-1 ...;Q;.;...:....~~p ____ ....1 Prevo Well Sampled in Sampling Event I-I_M_W_-_~ ____ --I pH Buffcr4.0 Well Dcptb(O.O 1ft): ~..,.cc Casing Volume (V) pH of Water (avg) 4" w ell:1 3 .1'\ I (.653h) 3" Wcll:~. _o __ ~. (.367h) Well Water Temp. (avg) I Id-..Li ;\ Redox Potential (Eh)1 ~ '10 Turbidity 1'---'7<-.-1"4_---' Weather Condo Ext'J Amb. Temp. ·C (prior sampling event)I -'"ic .... Time 113 d.-() I Gal. Purged I 5.-r~ I Time II :.);l l I Gal. Purged I !). 4.S I Conductance I &1g ( I pHI b.'i3 I Conductance I b761 I pHI 6.'1.5 I . Temp. DC I Ia.. ij:) I Temp. DC I I'; 3~ I Redox Potential Eh (m V) I :,1..~O I Redox Potential Eh (mV) I ~qo I Turbidity (NTU) L "'1 .;;' I Turbidity (NTU) t Ib J Time I I~~ I Gal. Purged I .~·1 4 I Time 1 1 3~3 I Gal. Purged I Ie, "3?l I Conductance I bi~ I pHI Ce .'/G I Conductance 11016.7 I pHI (Q . q.r. I Temp.oC I 1¢..4~ I Temp.oC 1 l:l. ", 'I I Redox Potential Eh (mV) I ~'I O I Redox Potential Eh (mV) I :J.. '1 0 I Turbidity (NTU) [ '7:2 ! Turbidity (NTU) I 7 S I White Mesa Mill Field Data Worksheet for Groundwater Mill -Grouodwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) Volume of Water Purged 1,---=,~:...=4~'-\ __ ~ gallon(s) Pumping Rate Calculation Flow Rate (Q), in gpm. 5/60 = I . J if ~ Time to evacuate two casing volumes (2V) T =2V/Q = I 3.'\:D 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 A\,J 1\ L i .sed o~ \J 0 (. ~ Sample Taken Sample Vol (indicate Filtered Preservative Preservative Type ofSamplc if otber than as Added y N specified below) y . N Type y N VOCs IS1 0 3x40 rot 0 aJ HCL IZI 0 Nutrients [iJ 0 100 ml 0 iii H2SO4 [!J 0 Heavy Metals ijJ 0 250m[ 5i) 0 HN03 (i;J 0 All Other Non Radiologies [j 0 250 ml 0 m NoPreserv. 0 ~ Gross Alpha I:j 0 1,000 ml SI 0 HN03 IS 0 Other (specify) m 0 Sample volume 0 III 0 il (,.e.r.U"o..\ -rn<>~o.l'\ic:'::l Ifpre~erviltivc i!> used, s(lCcifY Type and Quantity of Preservative: See instruction L...-_______ --JIDo not touch this cell (SheetName) White Mesa Mill Field Data Worksneet for Groundwater .A 2 of? capturK CO,,"UTlIL[ WITH./'-HU'k-FUNCTIONAL( I .. MiII-Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) OENISONr') ~ MINES ATTACHMENT 1 WHITE MESA URANIUM MILL Attachment 1 [~~ See instruction FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: I I ':.T G"lv.G\rkr-(,.r ou..Y\d, \No.:h.f" ~o 1\ Sampler Name and initials: '~nr\~r Hoi /.·o\th~/IH Location (well name):, M W -M ~---------------------------------~ Date and Time for Purgingj ';J.../ <6/;;)..0 I' and Sampling (if different) N'/A ~~~---------------~ Well Purging Equip Used: ~pump o@bailerWellPump(ifotherthanBennet) .... 1 ....;:Q~E....;:D'"--_________ -' I I f'lIW-IY Sampling Event ~Q.r·h.rltl &'vJ Prevo Well Sampled in Sampling Event .... _______ --' pH Buffer 7.0 7.0 pH Buffer 4.0 4.0 Specific Conductance .... 1 ____ 4-'-q-'-q~ ___ ---'1 ~MHOSI cm Well Depth(O.Olft): '\\,:\.OD Depth to Water Before Purgin~ C::> ~. q 1 Casing Volume (V) 4" well:l 2>o.7 L\ 1(.653h) 3" Well: 0 ,C.367h) L..-__ --' Conductance (avg) Cl1 7Y pH of Water (avg) ,s,Sg ~~~------~ Well Water Temp. (avg) l\}.Oj Redox Potential (Eh) 1 3D':::' TurbiditYIL--Y_.4 __ ~ Weather Condo Ext'l Amb. Temp. ·C (prior sampling event) I -5 0e. Time 'I:J.-ID I Gal. Purged 1 fob. 710 I Time 1 1~11 I Gal. Purged I bD .97 I Conductance 1(,,'1"15-I pH I S .S'7 I Conductance I b'11l I pH I E..bo I Temp. DC I l'i ·\0 I Temp. DC III.\.O C: I Redox Potential Eh (m V) I 30~ I Redox Potential Eh (mV) I 303> I Turbidity (NTU) 1 q~ I Turbidity (NTU) I !...j .Y I Time 11?.1~ I Gal. Purged I b\. )~ I Time 1 1;;t.\3 I Gal. Purged 1 G \. 'J I I Conductance 1 b~;<::> I pH 1 S .S! I Conductance I I;q bL> I pH I 5 .3g I Temp. DC 11L\.D8 I Temp. DC I 'Q·07 I Redox Potential Eh (m V) 1 3;53 I Redox Potential Eh (m V) 1 ~u~ I Turbidity (NTU) 1 ttG I Turbidity (NTU) 1 93 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 I " 1 • g 9 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;2.33 .ljO 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~ AVJA 1.. 1 ,S c,t of' "0(.5 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 [] 0 3x40 ml 0 [] HCL ~ 0 Nutrients rn 0 100 ml 0 ~ H2SO4 iJ 0 Heavy Metals [l 0 250ml 51 0 HN03 G1 0 All Other Non Radiologies 01 0 250ml 0 rlI No Preserv. 0 IZI Gross Alpha C!I 0 1,000 ml I!:I 0 HN03 Ei!I 0 Other (specify) [:J 0 Sample volume 0 IE 0 I1J &e.n-(.rlll' -r:(\o)-~o-,,; ~ If preservative is used, specify Type and Quantity of Preservative: Comment [ }, See instruction L....-_______ ---lIDo not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater 2 of 2 MiII-Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) OENISONI)~~ ATTACHMENT 1 WHITE MESA URANIUM MILL Attachment 1 [-See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: '),ST Q"'~1" h r (;-("OIJ\(\J. vJ",,+<.<" ~Oll Location (well name ):,I--JV.._w_-_;t3-=-________ ----' Sampler Name and initials: '...,-e..r'\I1~'I" ~o 11 ;J,~ /TH Date and Time for PurgingJa......;;;,,;;;....:../_".:..:..J_~_D_..,;l..:...1 ___ ----l and Sampling (if different) N'//l-~~------~ Well Purging Equip Used: [IDpump o@ bailer Well Pump (if other than Bennet) 'Q E:D 1---'---------' Sampling Event ,Q",cM' t,,('\~ &-\oJ Prevo Well Sampled in Sampling Event I .M W -:3~ pH Buffer 7.0 7 .0 pH Buffer 4.0 q.O Specific ConductanceL-' _-:,9-:,QQ...!...-__ ....IIIlMHOS/ cm Well Depth(O.Olft): t3;t·oa Depth to Water Before Purgin~ 113. ~ 0 Casing Volume (V) Conductance (avg) pH of Water (avg) Well Water Temp. (avg) , I 'J...l 0 Redox Potential (Eh) , '3 'J5 4"well:1 \1.8\ 1(·653h) 3" Well:L-__ O __ --'.(.367h) ~.13 TurbiditYL-' --'\";"" b __ -" Weather Condo Ext'l Amb. Temp. O( (prior sampling event)' 0° c:. Time , 14d-.O I Gal. Purged I \1.'=-8 I Time I ,y~\ I Gal. Purged , 17 .gg I Conductance I LjOO~ I pH , (0·1:3> I Conductance 1 1400(:, I pHI (0·13 I Temp. DC 11 ;;l..FO I Temp. DC 11<1 .13 I Redox Potential Eh (m V) 1 :>:;2.(0 I Redox Potential Eh (m V) 1 3.?k I Turbidity (NTU) I 1.7 I Turbidity (NTU) I J.b I Time 11"lxt I Gal. Purged 1 \~-Dq I Time I \ 'i 2") I Gal. Purged I 18 .3D I Conductance I \iDO b I pH I ~·I.> I Conductance I qODb I pHI b. L3 I Temp. DC 1 l?-,.Ob I Temp. DC I l;;t·o' I Redox Potential Eh (m V) 1 3 ;LS I Redox Potential Eh (mV) I 3 =;).5 I Turbidity (NTU) I 1.7 I Turbidity (NTU) I 1. ~ 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 I #. ~g Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = I . ?,.og gallon(s) Time to evacuate two casing volumes (2V) T = 2V /Q = I 1 \ 3, "4 I Number of casing volumes evacuated (if other than two) I ,.Q3 If well evacuated to dryness, number of gallons evacuated Name of Certified Analytical Laboratory if Other Than Energy Lab~L_/II._Y._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 0 0 3x40 m! 0 0 HCL 0 0 Nutrients 0 0 100 mI 0 0 H2SO4 0 0 Heavy Metals 0 0 250mI 0 0 RN03 0 0 All Other Non Radiologies 0 0 250 mI 0 0 No Preserv. 0 0 Gross Alpha 0 0 1,000 ml 0 0 RN03 0 0 Other (specify) 0 0 Sample volume 0 0 0 0 If preservative is used, specify Type and Quantity of Preservative: , ~ See instruction Comment '--_______ ----'IDo not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater 2 of 2 Mill -Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) ATTACHMENT 1 OEN.SOn ~ WHITE MESA URANIUM MILL Attachment 1 r ~~~ See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: 1 15T Qv..().~fe r G-(ou.nJ\\J",=t<.<' ~o" Location (well name): .... 1 _M_W_-_:J.._Y-'--_______ --' Sampler Name and initials: l .-tAl''1n<.r H~ll;d\Q.~/-r~ Date and Time for PUl·gin~L..-g...=:....:...-/....:..'i:....:/ 2:.=..0_'_' ____ ......I and Sampling (if different) 1 :;;"'/10 / ~ 11 Well Purging Equip Used: [IDpump or@] bailer Well Pump (if other than Bennet) Q €D L..-~-=-___ --J Sampling Event 1 Q",,~("h·(b Cr'v0 pH Buffer 7.0 /.0 Specific Conductance .... 1 __ q.:....q!...:'\-'--_----II f.1MHOS/ cm Depth to Water Before Purgin~ , \ L\ • Sc::, Conductance (avg) Prevo Well Sampled in Sampling Event I J'.\W-';]'3 pH Buffer 4.0 Well Depth(O.Olft): 1;1.0.0b Casing Volume (V) pH of Water (avg) 4" well:1 3. S5 1(·653h) 3" Well: 0 (.367h) L.....-__ --' Well Water Temp. (avg) )3,l)\ Redox Potential (Eh)1 300 Turbidity 1 ).~ Weather Condo Ext'l Amb. Temp. °C (prior sampling event)1 0 0 .; Time 1 \~'S I Gal. Purged 1 3. & t-t I Time I 13)~ I Gal. Purged 1 L1. 0.3 I Conductance I Lj b4 \ I pH 1 ~.7b I Conductance I Y(,Lll I pH 1 'S .7.5 I Temp.oC 11 3.00 I Temp.oC 1 13 ,o~ I Redox Potential Eh (m V) I .?.'1Z I Redox Potential Eh (m V) I ~44 I Turbidity (NTU) I J,~ I Turbidity (NTU) I , .g, I Time I \sn I Gal. Purged I ~.M I Time I 131?) I Gal. Purged 1 L1 . \oj J I Conductance I LJbl\:l I pH I 5.75 I Conductance I :i bLl ~ I pH 1 S .73 I Temp.oC 1 \3.DD I Temp.oC I 13.00 I Redox Potential Eh (mV) I ~D l I Redox Potential Eh (m V) 1 ~w. I Turbidity (NTU) I 1..2 I Turbidity (NTU) I ]. 2. I White Mesa Mill Field Data Worksheet for Groundwater 1 of 2 MiII-Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) Volume of Water Purged I .5-7~ gallon(s) Pumping Rate Calculation Flow Rate (Q), in gpm. Time to evacuate two casing volumes (2V) S/60 = I -\q~ T=2V/Q= I 3 7.00 I Number of casing volumes evacuated (if other than two) I 1. bd... If well evacuated to dryness, number of gallons evacuated 5.7£ Name of Certified Analytical Laboratory if Other Than Energy Lab~L-.~N,.;.!.,/~A':""-_____ ----I Sample Taken Sample Vol (indicate Filtered Preservative Preservative Type of Sample if other than as y N specified below) VOCs 0 0 3x40 rnl Nutrients 0 0 100 rnl Heavy Metals B 0 250 rnl All Other Non Radiologics 0 0 250 rnl Gross Alpha 0 0 1,000 rnl Other (specify) 0 0 Sample volume Comment Y N 0 0 0 0 1511 0 0 0 0 0 0 0 Added Type y HCL 0 H2SO4 0 HN03 I'lSl No Preserv. 0 HN03 0 0 If preservative is used, specify Type and Quantity of Preservative: 1---: See instruction I ' ~ Arr :\)c.~ on ~;t<.. c...-\-\L\'1Q . -rt.."f\-t.f" Hol\;~GI~ ?r~~n1 ill. .?u.('~<.. I\\W -~""l ?VI.{,~~ be~",,,, ~1 \l\SS. -roov, ?"'r~l\'\~h.("5. o..f.hr ~D M,r\",,\--e..!> tAv.<.. to 'FID~ (ti..+c Je:.(.{"UAS.i ~. Pu..r~'('~ Wc.ll ~b( #... .teA· A \ "t!i 3D 1'-"\,1'\",-\6 . W-eJi 'R~t'l Dr~l. N 0 0 0 0 0 0 \()f.I:rcr \j.)a..) MOS\\~ c.\eu.('. Dcp-rh +1) -w",,1<r tAga f'v.r~"O( wv.5:. I \b.l \ Ld1 .s;1-c Po..} t530 Arr':IJ<lA DI1 ~;+< "'+ o7bS. -(CU'II'\er" lio \);JG\~ fr~<:.(\+ -tc) c..e:.l/e.(,t ~""Mfk . OC:ft~ +0 WtA:kr be.\'ort:.. ~Cll"'lfk. ~~ -ro.v,c.Y\ WCA.~. Sc...r1I\?k <...o\l ~decl t).:-\ D~O(). L~.r1 ~'It-c &\-1 08Dt;. 11~.bS '--_______ ----'IDo not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater 2 of 2 Mill .. Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) ATTACHMENT 1 OENISONf)J~ WHITE MESA URANIUM MILL Attachment 1 r-~ ~I See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: G\lla.r-\ .. -cr1i Cn-O v.vv}> WC\.fvT ~o, 1 Location (well name):I'-_M_W_-...:...;lS _________ ----' Sampler Name and initials: I"'-; .. m<.f" Ho J1:JIlI,~/TH Date and Time for Purgin~,-~;......:....:/').;..;./.:...;~~O-,-\ ,'---___ -' and Sampling (if different) .;V'/A, '---------~ Well Purging Equip Used:~pump o@ bailer Well Pump (if other than Bennet) Sampling Event I Q~()..,t-e-rltl c,.W ,2.011 Prevo Well Sampled in Sampling Event LI __ M_W_-_l_l ___ -J pH Buffer 7.0 7 .0 Specific ConductanceLI_q:......:q~q ___ _1IJlMHOS/ cm Depth to Water Before Purgin~ -"1'1 .7 fo Conductance (avg) pH Buffer 4.0 Y·O Well Depth(O.Olft): '\5.00 Casing Volume (V) pH of Water (avg) 4" well:1 ?-c:'·?-7 1(·653h) 3" Well: 0 (.367h) '""""----"------' Well Water Temp. (avg) I ,~.SS Redox Potential (Eh) 1L-'3_1_5 __ --' Tlu"biditY,-1 _0 __ --' Weather Condo Ext'l Amb. Temp. O( (prior sampling eventll -17 °(.1 Time I 130.5 I Gal. Purged I S~.'J..S I Time I nDt;. I Gal. Purged I s'-\ . '-1-b I Conductance I 3.171 I pHI b.bCf I Conductance 13.173 I pHI (;.63 I Temp.oC I 1;;.5 7 I Temp.oC I 13.1;5 I Redox Potential Eh (m V) I 3:tb I Redox Potential Eh (m V) I s r~ I Turbidity (NTU) I D I Turbidity (NTU) I u I Time I '~D] I Gal. Purged I S4 .. 6~ I Time I \3D 8 I Gal. Purged I SL\ .. qD I Conductance I :Sl ~:b I pHI b .GC I Conductance I 31 715 I pHI b.b~ I Temp.oC I 1"J.Se; I Temp.oC I 1'35J I Redox Potential Eh (m V) I 3 Pl I Redox Potential Eh (m V) I '31:,J I Turbidity (NTU) I 0 I Turbidity (NTU) I 15 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 I 5:) .33 Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = I . J..17 gallon(s) Time to evacuate two casing volumes (2V) T = 2V/Q = I ?l-\:;A.)g 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 Labl AWAL ,.sod or" c,c.~ Sample Taken Sample Vol (indicate Filtered Preservative Preservative Type of Sample if other than as y N specified below) VOCs ij1 0 3x40 rn1 Nutrients ~ 0 100 rn1 Heavy Metals ~ 0 250 rn1 All Other Non Radiologics Ell 0 250 rn1 Gross Alpha 171 0 1,000 rn1 Other (specify) ~ 0 Sample volume Comment Y N 0 III 0 !:zJ 111 0 0 jZJ lSI 0 0 ~ Added Type y HCL 1Zl H2SO4 &I HN03 ~ No Preserv. 0 HN03 ~ 0 If preservative is used, specify Type and Quantity of Preservative: ,---See instruction I ~ Arr;\)·d. on ~;tc::. «t 0&'15 . 1c..·(I)'\<.r ChY\tA &,,((;n ?I"~c.rd .. tor pU\~e.. o..rlJ.. ..s~1'"Y1fl ;~ 'C\J'"C::yrt .. ?ur~-e. 'b~o.h 0.1-08.5S, Pv.r~-<.tA. Well .fo(' ~ tol~' 0{' ~SS M ;.-1 ""+ t:.s . \Vc;..t-<.r wo.~ dec..r -i-hfc::.~\..()~ p\Ar~t. p"'\j<" -en~e~ ~nJ. .s~Mpl-cj \,J'«(<. (.ol[-cdr;ct o.~ 1310 . D.:pth 1-0 \OtAt(r I1.t+Cr puUc. WGl.) 7b.7S L-c~ j;+e-t1I.-t 13M ~ _______ --,IDo not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater N 0 0 0 J)!1 0 ~ 2 of 2 Mill -Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) i OENISONI)J~ ATTACHMENT 1 Attachment 1 WHITE MESA URANIUM MILL See instruction ! MINES FIELD DATA WORKSHEET FOR GROUND WATER ---- Description of Sampling Event: 11 ~"T Qv.o.dc.r Gf"ou.n£l\ W()oo..+~(" ;2..0 J I Location (well name):LI .:..-M...:....W_-_?--_b ________ ---I Sampler Name and initials: 1""-",,, ncf R 0 )1,1\ ~ I, It Date and Time for Purgin~ ?-/ I r.:,/~O I \ and Sampling (if different) #/A L-_______ ~ Well Purging Equip Used: ~pump or@] bailer Well Pump (if other than Bennet) I Gn.,,(\J\:ro~ Sampling Event IQ\)..",rte("~ lrw Prevo Well Sampled in Sampling Event .... 1_M_W_-_3 ____ --' pH Buffer 7.0 7.D Specific Conductance .... I_C1'-'~'_q.L.._ __ _IIJ.lMHOS/ cm Depth to Water Before PurgingJ 74. 8 1 Conductance (avg) pH Buffer 4.0 Y·D Well Depth(O.Olft): ~lPlJ=.:....<33I:::.-_-I Casing Volume (V) pH of Water (avg) 411 well:~_t:>~_-II(.653h) 3" Well:. () .(.367h) Well Water Temp. (avg) I \1.\. SS Redox Potential (Eh) 11...-3_1_1 _-' TurbiditYI.-I _I:>;.......-_--.J Weather Condo Ext'l Amb. Temp. °C (prior sampling event)1 gllc. Time pns I Gal. Purged I S I Time I I Gal. Purged I I Conductance I ~S~Z I pHI b.Ob I Conductance I I pHI I Temp.oC I IY . .5S I Temp.oC I I Redox Potential Eh (mV) I ~II I Redox Potential Eh (m V) I I Turbidity (NTU) I Q I Turbidity (NTU) I 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.oC I I Temp.oC I I Redox Potential Eh (m V) I I Redox Potential Eh (mV) I I Turbidity (NTU) I I Turbidity (NTU) I 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 1-1 _____ ...J Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = 1...-1 --=S---l.y __ .....J gallon(s) Time to evacuate two casing volumes (2V) T=2V/Q= 1 1 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 vJ A L I sd or \Joc.s 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 ~ 0 3x40 ml 0 r'J HCL KI 0 Nutrients ~ 0 100 ml 0 rn H2SO4 ~ 0 Heavy Metals IE 0 250ml ~ 0 HN03 0 0 All Other Non Radiologies !] 0 250ml 0 ~ No Preserv. 0 ..lEI Gross Alpha 1tJ 0 1,000 ml 12!1 0 HN03 ~ 0 Other (specify) E1 0 Sample volume 0 ~ 0 ~ Gen~ro-.\ -:rnoGo,,1\;('~ If preservative is used, specify Type and Quantity of Preservative: See instruction Comment Al'f~'\I'Cr). 6~ !:I·.t~ ~i \11:-ldo.(\l'\<.r-~O\l'I~:J pre.s~rJ--+0 c-b\\-c:d St'.\fVJpk-S . M\rJ;1.."-\~ c... (,on~\ nv..Ou.~ p\J\h'\p'II"~ \N-ell. '1'ooK \ Sd 6f; f(i\r~rI\e1e(.s ~(.I.~pk~ wac.. \u..'\(:~ 0..1 \~C::.~ \,0~1-t:( WIA~ <:l'f:cAf'. L~U ~;tc u.1-J~3 7 L-_______ ----IIDo not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater 2 of 2 Mill -Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) ATTACHMENT 1 OENISONI) ~ WHITE MESA URANIUM MILL Attachment 1 l ~ . See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: II ~'1 Gv.o-c-fu· G-rolAnJ: w, ... l<~ ;Z 011 Location (well name):II-_M_W_--=-;l....,;1 _________ ---I Sampler Name and initials: I T"'M~r Aoll : dD..!J/,-tt Date and Time for PurgingjL,.;;~......:..../....,;<1.:....J=-~_o_,, ____ _' and Sampling (if different) L........::jI/~'j-=-A-=---_____ ---I Well Purging Equip Used: lID pum p or@] bailer Well Pump (if other than Bennet) 1-1 O_E_D ____ ---' ! MW-2D Sampling Event I Gh)o.o.rtt:I""~ &W Prevo Well Sampled in Sampling Event 1-_______ --' pH Buffer 7.0 7 .D Specific Conductance'-I __ 4_~_4 __ ___'IIlMHOS/ cm Depth to Water Before Purgin~ S(J. tty Conductance (avg) pH Buffer 4.0 L\.O Well Depth(O.Olft): I 9,S ·O(J Casing Volume (V) pH of Water (avg) 4" well:! ?..S.77 !(.653h) 3" Well: 0 (.367h) 1..-__ ----' Co.7 , Well Water Temp. (avg) I 14 .?:s Redox Potential (Eh) I 303 Turbidity 1 0 '--------' Weather Condo Ext'l Amb. Temp. DC (prior sampling event) 1-go 0 L Time I n ss 1 Gal. Purged I S7.S0 1 Time 1 \ 15k. 1 Gal. Purged I 57.7;)... 1 Conductance 1 1St1~ 1 pH I (..7 ';;.. 1 Conductance I \S'i3 1 pH I (;,70 1 Temp.oC 1 1 4.~o I Temp.oC Ilq~ I Redox Potential Eh (m V) I 303 I Redox Potential Eh (m V) I 3 b3 I Turbidity (NTU) I D I Turbidity (NTU) I 0 I Time I 115'7 I Gal. Purged I 57.~3 I Time I l\S ~ I Gal. Purged I .58 · \ll I Conductance I lS'1 b I pH 1'.76 I Conductance I LS~1 I pH I b. Ii I Temp.oC I 19· 'J-7 I Temp.oC I Iq .~ I Redox Potential Eh (m V) I 3CJLt I Redox Potential Eh (m V) I '309 I Turbidity (NTU) I 0 I Turbidity (NTU) I 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 .s~ .s q Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = 11.-,_;2._17 __ -1 gallon(s) Time to evacuate two casing volumes (2V) T = 2V /Q = l;t ~S . '1 1 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~L.._N_/_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 0 0 3x40 ml 0 0 HCL 0 0 Nutrients 129 0 100ml 0 ~ H2SO4 ~ 0 Heavy Metals 0 0 250 ml 0 0 HN03 0 0 All Other Non Radiologies 0 0 250 ml 0 0 No Preserv. 0 0 Gross Alpha r:I 0 1,000 ml ~ 0 HN03 ~ 0 Other (specify) ~ 0 Sample volume 0 ~ 0 ~ TDS If preservative is used, specify Type and Quantity of Ch'D\\c\e. Preservative: S v. \ -\' 0-.1-eo. Comment I:" ~ See instruction ,,"J A\"l:\lc.6. ton ~{+<. ~J o7;J..3 , --r;..t\n<.r ~QJI ;~"'J pre~C:f'\t for pu.r~~ (l.t'lcA SClmpl :~ P\A""~""<.. b-e~C).r'\ A.~ 0'13()· fu.<~cA. WeI\ for '" t-ot~' c>r ~7D M ~t'1I.A.+':::~, \Va-+Gor 0~ M£)!;.}I(j G '-c o.r-+"h(O~l\'ho"'+ pu.Y'(~( Fv..(~'C.. enJeo. a.(\~ ~o.YV\ple.s we.rc:. Lollec..-\-c:,cX l>-..t ,,-CD. D~f>~ h \.0o..=t-er c....ttc.r pv.('~e vJ~ SJ..?S Len ~ l·t<-0-..+ l~b~ '--_______ -..IDo not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater 2 of 2 MIII-.Groundwater Oischarge Permit Date: 03/22/2010 Rev. 6 Groundwater Monltorins Quality A55urClnce PICln 100P) ! i i f , ft ATTACHMENT 1 t>ENISOti"" ~ WHITE MESA URANIUM MILL Attachment 1 1.-MINi:S FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: 1 !.!oT Ov.o.,..\.c.,. &ov..ntl We.. t e(' ~Cl\ t Sampler Name Location (well name):1 Mw _ ::ur and initials: <fl See instruction Date and Time for PurginS ~ MO ~I N/~l I and Sampling (if different) L--1tI._,;,...:It--'--_____ -I Well Purging Equip Used: [][I pump o{Q] bailer Well Pump (if other than Bennet) 1-1 ...:Q~~..;D:::;..-. ___ ..... Sampling Event 1 Qv..M b;r1'1 k W Prevo Well Sampled in Sampling Event I M W -~ pH Buffer 7.0 [ 7.0 pH Buffer 4.0 Y,O Specific Conductance 1-1 _~.l...,'{:"':~~_---II JlMHOS/ em Well Depth(O.Olft): 'lie) .o() Depth to Water Before Purgin~ ]1.) Y Casing Volume (V) 4" well:1 ~l'-% 1<.653h) 3" Well: C> (.367h) '-----' Conductance (avg) L.j01! pH of Water (avg) Well Water Temp, (avg) 1 1~-;2.3 Redox Potential (Eh)L.,:1 :J.:;;;;.:....JljL-_-' TurbidityI-I _O"""'-_--J Weather Condo Ext" Amb. Temp. ·C(prior sampling event)' -3 "s. I Time I lila I Gal. Purged I yot. 3 1 I Time I 1I1!e I Gal. Purged I Y;;l..53 I Conductance I =\0,1 I pH , !; 11 I Conductance I j Oil I pHI 5 70 I Temp.oC I i Y p.4 I Temp.oC I 1:\ .:»1 I Redox. Potential Eh (mV) , ;l.lS I Redox Potential Eh (mV) , ~1.5 I Turbidity (NTU) I 0 I Turbidity (NTU) I 6 I Time I IW7 I Gal. Purged , ~./~ I Time I 111$ I Gal. Purged I y~.qb I Conductance 1 40/' I pH I !).bCf I Conductance I LiD! I I pH I Sb1 I Temp.oC , ly.;t3 I Temp.oC I I Li .;1..'3 I Redox: Potentia! Eh (mV) I 21!:l I Redox Potential Eh (mV) I ~13 I Turbidity (NTU) I () I Turbidity (NTU) I D I White Mesa Mill Field Datil Worksheet for Groundwater ~. . 1 of2 capturx' CON,.,TIBU WITH/",U'U'W-.UNCTIONALITY ~ t-4,iII -. Groundwater Discharge Permit ) Groundwater Monitoring Quality Assurance Plan (OAP) I Volume of Water Purged I '13 .<-\ gallon(s) Pumping Rate Calcylation Flow Rate (Q), in gpm. S/60 = I . .'J..IJ Time to evacuate two casing volumes (2V) T=2V/Q= I i ~] 710 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 Labl .... _,.t._'I_A ______ -I Sample Taken Sample Vol (indicate Filtered Preservative Type of Sample if other than as y N specified below) y N Type VOCs 0 0 3x40 ml 0 0 HeL Nutrients 0 0 lOOml 0 0 H2SO4 Heavy Metals 0 0 250mJ 0 0 HN03 All Other Non Radiologies 0 0 250 ml 0 0 No Preserv. Gross Alpha 0 0 1,000 ml 0 0 lIN03 Other (specify) ij1 0 Sample volume 0 i1 Date: 03/22/2010 Rev. 6 Preservative Added y N 0 0 0 0 0 0 0 0 0 0 0 ~ Ch\O(.je... [fprcservativc is used, specifY Type and Quantity of Preservalive: S See instruction 'Comment -t Ar('.l.;c~ 0(\ ~'.tc. ",l o7.So -r;."ner HolI\J~ prC:..5~n-t ..for f'lA"~-C fA('IO-~4 r'Y1fl.~ ~c..nt. ru\~e. b~---Ja", tAt O~OO f\ ... r~~t\ \,Jell ",or '" -+o·tc.\ cA .:too M.(llAte..s Wc..-fc:r WcO GIc~r ·thro~c\.(+-p~r\Je . Pv..C~C:: endeq <A.nA 5Qf11ph. Wc,~ (..011 eeJ-ec,.\ qt I I ~o , !)~P+~:t0 \.Vc.."t(r C\~r p v. (~C t.:)D.,s 80 . .0.5. L~~t 51+"(. o.t 1/.;2.L..1 1--_______ --11 Do not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater .A . 2 of2 capturx CON~"'TI'LI WITH/'"_nr--FUHCliOHALlTV Mill-Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) ATTACHMENT 1 OENISONr'l J WHITE MESA URANIUM MILL Attachment 1 [:~I See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: 1 Qv-.Ar 1"U 1'0 G=fo",(\l'W~li:"-.9.011 Location (well name):I<-M_W_-_3_0 _________ --' Sampler Name and initials: 1)";;",,<(' HoJl :~t!(jh1t Date and Time for Purgin~ ~-) -Q.Oll and Sampling (if different) <-__ .I\I_/A-____ --' Well Purging Equip Used: ~ pump o@bailerWellPump(ifotherthanBennet)L-Q_E_O ____ .....I Sampling Event 1 QWArhr\~ 6-W ~O\) Prevo Well Sampled in Sampling Event 1'--_M_W_-_3_1 ____ --' pH Buffer 7.0 /.0 Specific Conductance .... 1 _"q_q ___ --JI J.!MHOS/ cm Depth to Water Before PurgingJ ib.3 \ Conductance (avg) pH Buffer 4.0 '1 .0 Well Depth(O.Olft): L...ll_'D_,_O_D __ -J Casing Volume (V) pH of Water (avg) 4" well:1 d-\.~q 1(·653h) 3" Well:L... _O __ --'.(.367h) Well Water Temp. (avg) 1 \-:;,::)"-1 Redox Potential (Eh) .... 1 _'3_0_g __ -I TurbiditYL...1 _Q __ ---' Weather Condo Ext'l Amb. Temp. DC (prior sampling event)1 -5'\ Time 1 );7.35 I Gal. Purged 1 '-\3 .'"\ I Time 1 )X3b I Gal. Purged 1 q~. f) I I Conductance I ;;"'OQ..D I pH 1 G:,·Q3 1 Conductance Id-.O.;l.D I pH I b.45 I Temp.oC I 13 .314 I Temp.oC 1 1'3.3S I Redox Potential Eh (mV) I ~c:5q I Redox Potential Eh (mV) I 3og' I Turbidity (NTU) I 0 I Turbidity (NTU) 1 0 I Time I )g","31 I Gal. Purged I ~3. ~'3 I Time II;;!,,:) cg I Gal. Purged I q 4· DOS I Conductance I ?-CJ'X3 I pHI c;;.qs I Conductance 12~ I pH I b·Zf~ I Temp.oC I 13.33 I Temp.oC 1 13.'35) I Redox Potential Eh (m V) I 307 I Redox Potential Eh (m V) 1 ~Z57 I Turbidity (NTU) I 0 I Turbidity (NTU) I b 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 I t..\l\,L.HS Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = I -;).\/ gallon(s) Time to evacuate two casing volumes (2V) T=2V/Q= I ',)..0-;;',710 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 Labj AWA L 1 .s c-\ l>r\jOcs. 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 IE 0 3x40 ml 0 ~ HCL 19 Nutrients I!I 0 100 ml 0 ~ H2SO4 EJ Heavy Metals ~ 0 250ml 1fI 0 HN03 f1 All Other Non Radiologics ID 0 250 ml 0 III No Preserv. 0 Gross Alpha rn 0 1,000 ml 'f] 0 HN03 lJ Other (specify) m 0 Sample volume 0 I!:J 0 (n~nt:.(G\\ ~o('~ttY\ic.) If preservative is used, specify Type and Quantity of Preservative: Comment -,;iI See instruction A,.(":\lca 01'\ f,:te. 0..1 OQ07. "-"I"\f\(( ~oll :cA"~ r,-e,sc,f\+ ~or pu.r~~ o..f'\ti\ .s"""pl"~ e\)~t1-1 . p v..fj~ bG()/J,," 0-..+ 0'1 IS, p\)\f'~<'~ wC.n .\01' 0.. ·h.-tGo.' ()-\' ~os M:nlJ\.i-es . \r0o..+·u Wo..S (.\<o.r-+~rOv.~h(:)v-.t ?\Ar.3e.. -?""'r-0~ ~n~eJ.. ",.,J-.s~m?k~ IN (1.(,<" (.0) ) '(.c.te 01.. a. t-~'io U-e?th +¢ V0o..~<.r (A{t~(' ?u..'~c. \NIA~ ,g, KS L-et\ sitt. 0..1-1~\..1 L...-_______ --IIDo not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater N 0 0 0 ~ 0 19 2 of 2 Mill-Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) ATTACHMENT 1 OENISONr') ~ WHITE MESA URANIUM MILL Attachment 1 :~ See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: ! Q ""o...('t <.r I ~ GroVo,(\l}\\lJCA..i (.1 ~O\ I Location (well name):!Io..-M_W'--'---_3_1 _______ ---' Sampler Name and initials: 'To-,nn<.r Htl ll:JIA.-a 7TH Date and Time for PurgingjL-'d-_/_l /_~_D_" ____ -I and Sampling (if different) A//At Io..-_~ ________ ...J Well Purging Equip Used:l]Jpump o@ bailer pH Buffer 7.0 7.0 Specific Conductance!I-__ q_~q"":""-__ ...J!)lMHOS/ cm Depth to Water Before Purgingj b~. Sq Conductance (avg) IlbLj Well Pump (if other than Bennet) I ~/A Prevo Well Sampled in Sampling Event '--_________ -' pH Buffer 4.0 Y .O Well Depth(O.Olft): 130.06 Casing Volume (V) pH of Water (avg) 4" well:1 LlO.)O 1(·653h) 3" Well: 1-. _O __ --'.(.367h) 7. ;;2.1 Well Water Temp. (avg) , Id.-Al Redox Potential (Eh) 'L---3_&> __ .-J TurbiditYL-1 _0 __ --' Weather Condo Ext'l Amb. Temp. O( (prior sampling event)I -(;~ Time 11Y3a I Gal. Purged , '60.?-q I Time I IL13J I Gal. Purged I ~O ·S~ I Conductance I 1"1 £:,;2.. I pH I 7-?\ , Conductance In(£' I pHI '·~ I Temp.oC I \'(1-.. c.l\\ I Temp.oC 1 \;t.A3 I Redox Potential Eh (m V) I 3~1 I Redox Potential Eh (m V) I '-SoD I Turbidity (NTU) I D I Turbidity (NTU) I 0 I Time I H31-I Gal. Purged I <60 .7:2.. I Time 1\1...133 I Gal. Purged 1 ~O.q9 I Conductance 1 I]Ck I pHI 7 ').J)... I Conductance I 17 73 I pH I 7'#2-} I Temp.oC 1 IA.") I Temp.oC 1 ':l-·~4 I Redox Potential Eh (m V) I '37'"\ 1 Redox Potential Eh (mV) I '371 I Turbidity (NTU) I D I Turbidity (NTU) 1 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 ~ 1.37 gallon(s) Pumping Rate Calculation Flow Rate (Q), in gpm. Time to evacuate two casing volumes (2V) S/60 = I . '?-\f T=2V/Q= 13bGl.59 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 LablAWAL J sd Dt vOGs. 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 lEI 0 3x40 ml 0 J9 HCL f1 Nutrients I!l 0 100 ml 0 I!I H2SO4 EJ Heavy Metals trJ 0 250ml 'E 0 HN03 El All Other Non Radiologics l!1 0 250 ml 0 ~ No Preserv. 0 Gross Alpha i!1 0 1,000 ml !J 0 HN03 "'El Other (specify) rEI 0 Sample volume 0 ~ 0 L-CN:fQ.\ J:'(\or~(i\fI~() If preservative is used, specify Type and Quantity of Preservative: See instruction Comment Arr:.:Jt:A 0\,\ ~:1t' 0...1 O~lO. T~nl1e.r" H()\lJA~ pr<,~cI\1 ~()r p\j.,(~t: o.f)rJ.. ~o..Mp1",,~ evc.n1. F\J-('~~ b~o." 0-.+ o~o . fv..r~<A wc..l\ ~cr ~+o-\",\ ~ '3.75 ",,:nv,:t<s , \0",,-\~r" I.:)~ M"S,t\>\ 6\-(Ar -rhr()~"'o\)",-t r-V\r~~. Pv...I~~ "C.(\o.~~ o..r'\c;\ ~o...J'Y\f1-c::, I,.)c.('-(, Loll c::c.tc~ 0... t P1~5 , D-c:.f+h t-c v.JO\..¢u 6..~U p\A~~ \.0~ I J,&-S L -G.}t ~ ~ i (. u-.-t \ Y SO L-_______ ---IIDo not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater N 0 0 0 t1 0 19 2 of2 Mill -Groundwater Discharge Permit Date; 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) ATTACHMENT 1 OENISONr:J. ~ WHITE MESA URANIUM MILL Attachment 1 [ '-I See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: 11$" ~r\-"Gr &-ro"","'J. \.A)o-i-~r ~o" Location (well name):1-1 __ M_w_-_3.:2.......:....;~ ______ ----J Sampler Name and initials: I -r;,r'I(1a HoI! J A..!1/111 Date and Time for Purgin~ -;;.../ q J :;).011 and Sampling (if different) Well Purging Equip Used: IT!] pu m p or(]] bailer Well Pump (if other than Bennet) L--Q....:...-E_D ____ .......J I f\AvJ -:27 Sampling Event I G>'-'.M·\.c.d,:1 c,.\J Prevo Well Sampled in Sampling Event '--_______ ....J pH Buffer 7.0 7-0 pH Buffer 4.0 LJ .O Specific Conductancel-I --,-9~-,-q-'--__ .......JII-4MHOS/ cm Well Depth(O.O 1 ft): 1 '3~.-SO Depth to Water Before Purgin~ 7 b _ 2. g Casing Volume (V) 4" well:1 3~. 71 1(·653h) 3" Well: 6 (.367h) 1.....--"'-_----' Conductance (avg) '-\oss pH of Water (avg) (0.0\ Well Water Temp. (avg) Redox Potential (Eh) I /1 Turbidityl ~. ~ Weather Condo Ext') Amb. Temp. °C (prior sampling event)1 -B'0< I Time I l~tS I Gal. Purged 17? -b4 I Time I 131b I Gal. Purged 17 'J... a. \ I Conductance I 4D5;;l I pHI ~.oy I Conductance I ~ObO I pHI b.O\ I Temp.oC I J3.Qo I Temp.oC I \3· g"l I Redox Potential Eh (mV) I 7 8 I Redox Potential Eh (mV) I /1 I Turbidity (NTU) I g.S I Turbidity (NTU) I g.7 I Time I )~17 I Gal. Purged I 7 3. l;;l I Time I 13 1& I Gal. Purged 113 .3Y I Conductance I '-lDS?.. I pHI b.OC I Conductance I '-\0 S~ I pH I 5.Q'f I Temp.oC I r~·8 b I Temp.oC I 13.85 I Redox Potential Eh (m V) I 77 I Redox Potential Eh (m V) I 7fo I Turbidity (NTU) I :0.1 I Turbidity (NTU) I ~.b 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 I 73~ 7 s gallon(s) Pumping Rate Calculation Flow Rate (Q), in gpm. Time to evacuate two casing volumes (2V) S/60 = 1 • :lJl T=2V/Q= 133.8'.3.5 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~L..._.N-,/._'A ______ ---l 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 0 0 3x40 ml 0 0 HCL 0 0 Nutrients 0 0 100 ml 0 0 H2SO4 0 0 Heavy Metals 0 0 250ml 0 0 RN03 0 0 All Other Non Radiologies 0 0 250ml 0 0 No Preserv. 0 0 Gross Alpha DI 0 1,000 ml rn 0 RN03 rn 0 Other (specify) el 0 Sample volume 0 0 0 0 r,d~,-PH If preservative is used, specify Type and Quantity of Preservative: Comment r ,~ See instruction Arri\leJ. on ~it-e f-1 073~. _ -r;..1'\f\~r 1-loll:J~ p ..... es.el"l-t -\0/ p\.Af"~~ "l.ncA ..sa.J'V\pl~ ~vel'\t. PlAr~~ b-e~ ... (\ 0.1-071-10 ?\A(~<'~ we1\ ~()..-0.. ·hA,o..\ eX 31..\0 M;nv.t'G~. Wo-.1-~r ~AtA \J~(~ \',.\-\.\'(, G{)\Oi'o..~;O¥\. ~\.\'(~~ -e..Y'lde~ tk.YlJ. sarV1rl< w as c61 led-ed ~+ 13 ~O. D-C~h 1-CI 'Wo...-\-~r o...q.C( fl.A.r.:j.e 1..0~ ~~.Sq Le.~ s~i G 6-.t )~b -I-, ________ .....JIDo not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater 2 of 2 Mill-Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) Attachment 1 ATTACHMENT 1 OENI50NI)~~ WHITE MESA URANIUM MILL See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: I 1 ST Q~CA.Mc.r Grou.l'\()\ \I0, .. :\<r d-.,C II Location (well name):II-_M_W_-_3_'-I...:.....-_______ -l Sampler Name and initials: l:::rciflMf Holl.J~ /-TH Date and Time for Purgingj ..... ~_/_I b_7_~_O_II ____ --' and Sampling (if different) Well Purging Equip Used: [QJpump 000 bailer Well Pump (if other than Bennet) Sampling Event I Q~/).der~ &-'vJ Prevo Well Sampled in Sampling Event I-I_M_W_-_~ ____ -.I pH Buffer 7.0 7.0 pH Buffer 4.0 Ll.O Specific Conductance .... 1 _q...;...~..:....9-'--__ ....I1 ~MHOS/ cm Well Depth(O.Olft): IIDGI,IO Depth to Water Before PurgingJ 107. f:.4 Casing Volume (V) 4" Well: (.653h) 1--"":=-4-----i 3" Well: Q (.367h) Conductance (avg) pH of Water (avg) Well Water Temp. (avg) 113.5 " Redox Potential (Eh) ..... I95_~-=----_-' TurbiditylL..........;.,ll ___ l _----' Weather Condo Llou~ Ext'l Amb. Temp. °C (prior sampling event)1 I D<. Time IO~ I Gal. Purged I 4 I Time I Og:;l:9 I Gal. Purged I -.5 I Conductance I ~~3~ I pHI ro.b7 I Conductance I Y2>::lb I pH I b.S,3 I Temp. DC IIY.51 I Temp. DC I \~.g.~ I Redox Potential Eh (m V) I ~O I Redox Potential Eh (mV) I ~Sj I Turbidity (NTU) I II <'::" I I Turbidity (NTU) lllO .b I Time I D3:f..h I Gal. Purged I b I Time I08d-,i? I Gal. Purged I 7 I Conductance Iq3~ I pH I 6.1$9 I Conductance I ~31~ I pH I ~.yq I Temp. DC 11"5 • "5 I I Temp. DC I I;'.S~ I Redox Potential Eh (mV) 1 ~~l I Redox Potential Eh (mV) I 'J..fo] I Turbidity (NTU) I 11;,1. J I Turbidity (NTU) I }O].l 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 1-1 _-'-1 ___ --' gallon(s) Pumping Rate Calculation Flow Rate (Q), in gpm. Time to evacuate two 'casing volumes (2V) S/60 = 1-1 ____ --' T=2V/Q= 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 Labj AWA \... 1 s d Of \JOG~ 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 'El 0 3x40 mI 0 ]g HCL ~ 0 Nutrients ~ 0 100mI 0 ~ H2SO4 rJ 0 Heavy Metals IE 0 250 ml 'fl 0 RN03 lSI 0 All Other Non Radiologics fa 0 250 ml 0 ~ No Preserv. 0 1'1 Gross Alpha frI 0 1,000 ml '!J 0 RN03 rg 0 Other (specify) IE 0 Sample volume 0 'Fi1 0 ~ b-GY\eroJ 1JIO(~()..(\ ~ c.~ If preservative is used, specify Type and Quantity of Preservative: See instruction Comment Arr"\Je~ 0\'\ ~'A( o,.-t O~oS.T,,~ntr-, G-6.fr\r')I R~h (A:('C!.. 0-11 pr-e~n1-fi:) bo.;l MW-3 LI. .s+IA'(tc~ ~o b~\ \ 60..~ ogO~ . 1:>C7-.' J-!~ (10. -ta+~1 of' 7 6-~lIov'ls.. v,JD..h:.I" WGl~ fi\ 1:+-+ k ~'Ir\-~: Dnc.fI w{ ~(\-.-t;\le~ ~+~bk pq r~rYlehd ~tArV1fl-c.S D<.pth ~b \..Jo..-t~r "..rt1:r IJdl V:>CA.~ b,,;I(~ W~~ 10,. bS. LeH S:te. o,,~ 0&45 '--_______ -I!Do not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater uJO'( P\A./I-(d. At 08'30. 2 of 2 Mill., GroundVjatf!r DiKharge Permit Date: 03/n{2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan CQAPI I I I Attachment 1 ATTACHMENTl GENISO.!). .4 WHITE MESA URANIUM MILL ,~~, See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: I f,;,-Q v..cl..r ·t(.r &ro\Jo.(\fA Wo..\.er ;z..OI \ Location {well name):IL--.....,,;;,M....:..:..:vJ:....-....:;3~5;;......-_______ -..I Sampler Name and initials: I ~ nner I1li j I ;'4.~ I,om Date and Time for Purgin£l1,.;~~/..;,..I"\~/..:::~~O~\_1 ___ ----' and Sampling (if different) ;S/I.5/£OIl Well Purging Equip Used:OOpump o@ bailer Well Pump (if other than Bennet) I G-r:y.nA, \=b.s Sampling Event I Qv.a)..rterl:1 W Prevo Well Sampled in Sampling Event I M W 35 ~ pH Buffer 7.0 /.0 pH Buffer 4.0 40 Specific ConductanccL,..,! __ q.L..SJ...~.>---_--'IJ!MHOSI em Well Depth(O.Olft): ~4.50 Depth to Water Before Purgingj 11 J",. '4~ I Casing Volume (V) 4" well:1 7 8h 1(.653h) 3" Well: D (.367h) '---"'----' Conductance (avg) pH of Water (avg) Well Water Temp. (avg) __ I ...... 11_4.;...:\_----' Redox Potential (EIl)1 3 :30 Weather Condo Ext'l Amb. Temp. ·C (prior sampling event)! ' 3C>c.. I Time I cq;?.~ I Gal. Purged I 3 .b j I Time I I Gal. Purged I I Conductance 13:A9 fu I pH 11 .11 I Conductance I I pH I I Temp. "C I II '1 \ I '. Temp.oC I I Redox Potential Ell (m V) I 33 (:) I Redox Potential Ell (mY) ! I Turbidity (NTU) I JL'L~ I Turbidity (NTU) I J Time I I Gal. Purged ! 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 (mV) I I Redox Potential Eh (mV) ! I Turbidity (NTU) I I Turbidity (NTU) I I White Mesa Mill Field Data Worksheet for Groundwater .A lof2 capturx' (OMPUIIL! WITH ................ ~.UHCTIONAlITY Mill.' Ground"'!ater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) Volume of Water Purged 1...1 _·7;......;::3~b::...· __ -J Pumping Rate Calculation Flow Rate (0), in gpm. $/60 = 1-1 -...L.11.L.-_-.J gallon(s) Time to evacuate two casing volumes (2V) T = 2V /Q = 1 ' 'i.?. 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 LabI AWAL. I set c..f"VOC :':l Sample Taken Sample Vol (indicate Filtered Preservative Preservative Type ofSamplc if other than as Added y N specified below) Y N Type y VOCs ~ D 3x40 ml CJ lZSI HCL ts Nutrients S1 0 100 ml 0 [!) H2SO4 B Heavy Metals ijI 0 250 mt ~ 0 HN03 S All Other Non Radiologies ijJ 0 250 m1 0 ~ No Preserv. 0 Gross Alpha &I 0 1,000 m1 IE 0 HN03 T2l Other (specify) SI 0 Sample volume 0 ~ 0 G-etle. ... o..\ :IT'o~()""i(S Ifprcscrvativc is uscd, specify Type and Quantity of Pr~ser\'ati"e: g See instruction ilComment Arr,'\J41 A.-1 o'W; c/.".rr.n i'"lmt'r ~na R.:?J'" :'c.h \c(rYI~n or. ~,~~ to pu~~t': well . r "'(~<:: bGClfl a.:~· oq~ PVor~{a. Well -+c;,r ~b. Secane.1:) i0~ta wA..S rV10'.ltr~ dc,~r P\Ar6~o. w~11 rfi(~~ fv.r~c c::-nc.\ecl "'~ Oll).b Le~' ~:+c C\t O'i3:l, i\rr ;v~ on :'1-tC CA...} 1:l30 "D-"ner , (,.....,r '·."I , Md. R~() ~l on s,-4c h, ~Ctltlplc ~cl J :>o:...Mpks We,('e bl;\.;Iti\. tlt UYD . CA. ~o..r~<tGL<: f ""MP I..1cu I>.~ca ..to f dtc r J..J..'C G-ro.s.s J\1f'h~ C\.l'\tA hCt.l\J~ l't)e1",1.5 . Oq)~h ~ I..:)c..tcr bC'S;-ol'~ ~v."'p (c \.00..<:> I IJ .~· 'L~ c -I-.t \"'\~c:. Wo>.tc. Wo..s ~\rb I. --J I c: 0; f?'J:) L.....-_______ --1IDo not touch this cell (SheetName) White Mesa Mill N CJ 0 0 III 0 Ii] Field Data Worksheet for Groundwater A 20f2 capturx· 'OM""BLE WITII,...,............,k-.UNCTION~LITY • Mill· Gro!Jndwat@r Discharge Permit Date: 03/22/2010 ReI!. 6 , i 3 I f Groundwater Monitoring QuaJity Assurance Plan (OAP) ATTACHMENT I Attachment 1 I)ENISONI) J WHITE MESA URANIUM MILL ',J See in~tru~tion l._ MI~ES FIELD DATA WORKSHEET FOR GROUl''D WATER Description of Sampling Event: I I $ t OVQ...C" ~e..C Vr-OVA"'Id ..... te..r 70\\ Location (well name); ... , :...;v\~W~-_-S...::....5LoRu...... ______ --, Sampler Name and initials: Date and Time for Purgin~ ;t II Y I ?'Q i \ Well Purging Equip Used: ~ pump o@ bailer Sampling Event I Q UP-I" tt;..clY 61d pH Buffer 7.0 ... 1 7~~>oGD __ ---, Specific Conductance .... 1 ....J9L..::9.1...9.L.-__ ....JIIJ.MHOSI em Depth Lo Water Before Purgin~ AlIA Conductance (avg) L...' ...:..;":...;. . ..;..l ______ -J and Sampling (if different) Well Pump (if other than Bennet) Prevo Well Sampled in Sampling Event 11"\ W -;7£ pH Buffer 4.0 Iy.o Well Depth(O.Olft): I #IA Casing Volume (V) pH of Water (avg) 4" well:~_D~_-tI(.653h) 3" Well: Q . (.367h) 8.95 Wen Water Temp. (avg) 11ft. 15 Redox Potential (Eh) I ?Oct 0 Turbidity,-I-",Q~_-, 1 Weather Condo I ~' .:? vV\V\.y Ext'l Amb. Temp. DC (prior sampling event)l -3 0 (., I '----~----------' Time 10 B;tQ Gal. Purged 1-1 ..... 1 5,u,O"'--___ Time 1 I Gal. Purged I I Conductance 1-1 I:...:.I.:;.~ J-i _---..I pH 1 5.95 Conductance I I pHI I Temp.oC I ''If 75 Temp. "'C I I Redox Potential Eh (mV) Redox Potential Eh (mV) I I Turbidity (NTU) Turbidity (NTU) L J Time Gal. Purged 1..1 ___ --' Time I I Gal. Purged I I Conductance pH,-I ___ --, Conductance I I pH I I Temp.oC Temp.oC I I Rcdox Potential Eh (mV) ,-I ___ .... Redox Potential Eh (mV) I I Turbidity (NTU) Turbidity (NTU) I I White Mesa Mill Field Data Worksheet for Groundwater .A ~ lof2 capturx' COM'ATI8LE WIT"~~I'UNCTIONALIT> • Mill· Gr~undwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwilter Monitoring Quality Assurance Plan (QAP) Volume of Water Purged .... 1 ...... 1~5.,.;:Q~ __ --' Pumping Rate Calculation Flow Rate (Q), in gpm. 5/60 = 1 ..... 1 ..... 7"---__ --' gallon(s) Time to evacuate two casing volumes (2V) T=2V/Q= I /\//A I Number of casing volumes evacuated (if other than two) v iA I M A ., Ifwell evacuated to dryness, number of gallons evacuated Name of Certified Analytical Laboratory if Other Than Energy LabJ A LV A L-y,,?'S Sample Taken Sample Vol (indicate Filtered Preservative Preservative Type ofSampJc if other than as Added y N specified below) y N Type y VOCs IBI D 3x40ml D m HCL ~ Nutrients I}g D 100ml 0 IX! H2SO4 181 Heavy Metals !XI 0 250 mJ rs 0 HN03 ~ All Other Non Radiologies 181 0 250ml 0 1:'1 No Preserv. 0 Gross Alpha m 0 1,000 mI ri!I 0 HN03 ~ Other (specify) JiI D Sample volume 0 ~ 0 Gt!-AU'{)o.. \ 1: ""'0 i O,ll.AILfd Ifprcscrvati\'c is used, specify -...J Type and Quantity of Preservative: I ~COllunent See instruction Ar.-('-·,v ,,)... o{\. .nh_ ,,1-0800, 'o..oi\.v'\.e.r, 6c..("1'~,/'\,. tl.~ K:yC\.t\ >. VII\-$'h~ .... '~(!I.r {'i/\.s~l-~. (JVM.peJ. 50 &~Ho.A.s ,,~ Ac.~~ L-JA.tt.r, 50 bC',l\o,,~ o ·p So~P w~+ er, o.~ .50 6""lIoA"> o~ O.I. t..),,,te..i.5c..M f\e-.s we.re.. t~~w.... o..t Df?:J.O. l-e.fr .sd-e,.. IXr ~ _______ ..JIDo not touch this cell (SheetName) White Me$a Mill N D 0 0 iii 0 [ia Field Oata WOrk5hf!et ror Groundwater .A 2of2 capturx' COIIUlIBU WITH/",~b--'UHC110NALITY mill· Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (UAP) " . ~ : OENISO,}) J: ATTACHMENT 1 WHITE MESA URANIUM MILL Attachment I 1~' Sec instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: I I ~T Q w-...t~ r G-rO~fld. Wed", r ~o I ( Location (well name):I'--.... /V,"'-'W~-"""f.A ...... _______ -' Sampler Name and initials: I ~nn-er /-}c/l,'J"';tJnf Date and Time for Purgjn~ ;U 'b/;101 , and Sampling (if different) Well Purging Equip Used: [QJ pump o@ bailer Well Pump (if other than Bennet) I I MW·~b Sampling Event 4>,,),().rt <.l'l.l;j G-W Prev, Well Sampled in Sampling Event '-_______ --.J pH Buffer 7.0 7·0 pH Buffer 4.0 Specific Conductance 1L.---,'1..:..'f'l.L.-__ ......I1 j.lMHOS/ em Well Depth(O.Olft): Depth to Water Before PurgiDgI,-_-.;O~_ ... 4" well:~_6 _____ -II(.653h) 3" Well:. Q ,<-367h) Casing Volume (V) Conductance (avg) 10·1 pH of Water (avg) Well Water Temp. (avg) I 14 O:;l Redox Potential (Eh)1 ;;l.2k. TurbidityJ-l---"c~_-I Weather Cond, Ext'l Amb. Temp. ·C (prior sampling event,! g~ Time 112SGl I Gal. Purged I I Time I I Gal. Purged ! I Conductance I 10 .1 I pH ! ~,'i3 I Conductance I I pH I I Temp. DC I 19 b el. I Temp. DC I I Redox Potential Eh (m V) I ~b I Redox Potential Eh (mV) I I Turbidity (NTU) I b I Turbidity (NTU) I 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. DC I I Temp.oC I I Redox Potential Eh (mV) I I Redox Potential Eh (mV) I I Turbidity (NTU) I I Turbidity (NTU) I I White Mesa Mill Field Oatil Worksh~et for Groundwater .A 10f2 capturx' COMrn,"u W'TH/,-UU'..v-'UNCTIONALITY Mill-Grourldwater Discharge Permit DatI!: 03/22/2010 Rl!v. 6 Groundwater Monitoring Quality AssuranCI! Plan (OAP} Volume of Water Purged 1-1 _....;O::;.-._~--I gallon(s) Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = 1 0 Time to evacuate two casing volumes (2V) T=2V/Q= 1 6 I Number of casing volumes evacuated (if other than two) Q Ifwell evacuated to dryness, number of gallons evacuated o Name of Certified Analytical Laboratory if Other Thlll1 Energy Labf ... A'-'-W=-______ -'" Sample Taken Sample Vol (indicate Filtered Preservative Preservative Type of Sample if othcr than as Added y N specified below) Y N Type y N VOCs GI 0 3x40 m.l Cl 6CJ HCL bl Cl Nutrients GI Cl 100 ml 0 l!1 H2SO4 lEI 0 Heavy Metals Ii;Zl 0 250ml Ili:I 0 HN03 [!J 0 All Other Non Radiologics ISZl 0 250ml 0 121 No PreseIV. 0 I!g Gross Alpha BI 0 1,000 ml iii 0 HN03 1m 0 Other (specify) qJ 0 Sample volume 0 ~ 0 So &cneru.\ :l:no ~o..J\iL) I f preservative is llsed, specify Type lind Quantity of Preservative: J I . " :: G ~ "Comment See instruction Arr:uet,\ In l..o.b oJ .. l;;t5S .. ~l1ncr R6i1:'~~ pr(,St"II+-+0 coj/~c+ D"I: fj/Cl.t1J.r . lOO\r-I set eX' po..rG\.:I\I)~~e.rs. ~"rYJple~ WCf'( fv.lleG\ 0..1-1306 LeSrl-'~b 0..:1-1310 '--_______ --1100 not touch this cell (SheetName) : White Mesa Mill Fil!ld Data Worksheet for Groundwatl!r .A 2of2 capturx' CO"."TI.U WITH/,"~rir--'UNCTION"LlTY Mill -Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) OENISONI) J MINES ATTACHMENT 1 WHITE MESA URANIUM MILL Attachment 1 [~'~I See instruction FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: I \ £,;r Qv,o--rtU' &"fov\"(\J\ W Q.. t "C.f'" ~Ol \ Location (well name): .... 1 __ fV.._W_-_6_6 _______ ----' Sampler Name and initials: pro..t'II"I<. ... Ho \ \ i J\~ ~::V"Tr\ Date and Time for Purgin~'_?._I_~_/_:;lO_\ , ____ -----J Well Purging Equip Used:~pump o@ bailer Sampling Event I G> ",o-,rt·u-\ ~ Gr vJ pH Buffer 7.0 7 ·D Specific Conductance 1-1 _'1_q_~":""'-_----III-!MHos/ cm Depth to Water Before Purgin~ IOb.'l1 Conductance (avg) and Sampling (if different) AliA ~~----------I Well Pump (if other than Bennet) <-I _Q_c_D ____ --' / MW -1L\ Prevo Well Sampled in Sampling Event .... ________ -J pH Buffer 4.0 \.to Well Depth(O.Olft): \1,-\ .. 00 Casing Volume (V) pH of Water (avg) 4" well:/ 30.7'1 /(.653h) 3" Well:I-. _o __ --'.(.367h) Well Water Temp. (avg) 1 \'-I .Of Redox Potential (Eh) I 3()3 Turbidity <-I _4_. y'---_--' Weather Condo Ext'l Amb. Temp. °C (prior sampling event)I -So" Time I I GaL Purged I I Time I I Gal. Purged I I Conductance I I pH I I Conductance I I pHI I Temp.oC I I Temp.oC I I Redox Potential Eh (m V) I I Redox Potential Eh (m V) I I Turbidity (NTU) I I Turbidity (NTU) I 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.oC 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 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,------"..<:'....:...\ ...... '6::-\......:..\_-' Pumping Rate Calculation Flow Rate (Q) in gpm. S/60 = ..... 1 ,_?-_I_, __ ---' gallon(s) Time to evacuate two casing volumes (2V) T = 2V/Q = 1 ~33.L.\() 1 Number of casing volumes evacuated (if other than two) If well evacuated to dryness, number of gallons evacuated Name of Certified Analytical Laboratory if Other Than Energy LabjAWI\L \ ~d rI' 00L..5. Sample Taken Sample Vol (indicate Filtered Preservative Preservative Type of Sample if other than as Added y N specified below) Y N Type y N VOCs IE 0 3x40 m1 0 ~ HCL iJ 0 Nutrients I!] 0 100 m1 0 ~ H2SO4 l1 0 Heavy Metals lEI 0 250 m1 Iii] 0 HN03 ~ 0 All Other Non Radiologies ~ 0 250 ml 0 ~ No Preserv. 0 f] Gross Alpha r£I 0 1,000 m1 1!:1 0 HN03 [) 0 Other (specify) fB 0 Sample volume 0 [] 0 ~ lren<.ro..\ 1:no~()'f\~~ If preservative is used, specify Type and Quantity of Preservative: Comment ~ See instruction ,_1 L..-_______ ----IIDO not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater 2 of2 Mill· Grol.l?dwater Discharge Pennit Dale; 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) ATTACHMENT 1 I)ENISO.}) ~ , WHITE MESA URANIUM MILL Attachment I . /.. See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description ofSatnpling Event: I I~T Qv.(,\d~f' 6r~v.I'\c.\ \,\)g.+«.r ;;to 1 , Location (well name):IL-,;.tJ._W~-...!7-=O=--_______ --, Sampler Name and initials: I -U,nt)<::r Hc.j/,J"',:;\/'nt Date and Time for Pllrgin~ ::V15/~Oll and Sampling (if different) I--.N:~,/...:;.'A:-... _____ -, Well Purging Equip Used: U!Jpump o@bailerWellPump(ifotherthanBennet) .... 1 -"Q..o6,...!;:~;;...:n"",-___ --, Sampling Event I Qu,,;c-t,,('I; (,..W Prevo Well Sampled in Sampling Event ,-I_M_W_-_'~ ____ -I pH Buffer 7.0 1.0 Specific Conductance .... 1 _'tL..l9u'i __ ---I1 JlMHOS/ em Depth to Water Before Purgin~ 70 :3.5 Conductance (avg) ,--_"'=,;)5=--o.q~",,--____ ....... pH Buffer 4.0 y () Well Depth(O.Olft): 13Lt 00 Casing Volume (V) pH of Water (avg) 4" well:ll--lj ..... I_.5 ..... b---tI(.653h) 3" Well:. c . (.367h) ~.27 Well Water Temp. (nvg) i'~ ,~ Redox Potential (Eh)1 ~03 Turbidityl&....-.:.''''''';O::''----J Weather Condo Ext'l Amb. Temp. ·C (prior sampling event)1 -3\ 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. bC I I Temp. be I 1 Redox Potential Eh (mV) I I Redox Potential Eh (m V) I I Turbidity (NTU) I I Turbidity (NTU) I I Time I I Gal. Purged I I Time I I Gal. Purged 1 I Conductance I I pHI I Conductance I I pHI I Temp.oC I I Temp.oC I I Redox Potential Eh (mV) I I Redox Potential Eh (mV) 1 I Turbidity (NTU) I I Turbidity (NTU) I I White Mesa Mill Field Data Worksheet fQr Groundwater Mill . Groundwater Di~charge Permit Groundwater Monitoring Quality Assurance Plan (OAP) Volume of Water Purged I ~'-t b:} Pumping Rate Calculation Flow Rate (Q). in gpm. 5/60 = I I ptll ga"on(s) 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~,--,AJ:..;;;..:.../',-%1I.-____ ---J Sample Taken Sample Vol (indicate Filtered Preservative Preservative Type of Sam pic if other than as Added y N specified below) y N Type y N VOCs 0 0 3x40 rnl 0 0 HCL 0 0 Nutrients 0 0 100 mt 0 0 H2SO4 0 0 Hea vy Melals ~ 0 250ml r&J 0 RN03 m 0 All Other Non Radiologies 0 0 250ml 0 0 NoPreserv. 0 0 Gross Alpha 0 0 1,000 ml 0 0 HN03 0 0 Other (specify) ttl 0 Sample volume 0 EiI 0 m ~> ,-,,'.\G..\e: If prc'Icrvativc is used, specity Type and Ql1imtity of TD~ Preservative: a 5 . See instruction ~Comment '--_______ -...IIDo not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater ..A 2 of2 capturx COM.ATIBL! WITH/"" __ tir-'UNCTtOHALITT TabC Field Data Worksheets Accelerated Monitoring TabCl Field Data Worksheets Accelerated Monitoring January 2011 Mill-Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) OENISONI)~~ ATTACHMENT 1 Attachment 1 WHITE MESA URANIUM MILL See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: JVlortihl~ GY'olAMl WU-."k-jOo ~) Location (well name):L-1 _M_W_~_I_l ________ -, Sampler Name and initials: 1 ~I'\(I~ 11'0 /I,.J",~ /r1J- Date and Time for purginmL..........;l 1,---' 1..:....1_f)..D_"'---___ -' and Sampling (if different) Well Purging Equip Used: ~pump o@ bailer Well Pump (if other than Bennet) 1 Qffp Sampling Event \f""v.I)..(""~ i'-\Ol"lth 1:r I MW~3D Prevo Well Sampled in Sampling Event L.. _______ ---' pH Buffer 7.0 7.0 Specific ConductanceL-1 _q..:..~..:....'\~ __ --,I /-lMHOS/ cm Depth to Water Before Purgingj g 'l. "0 Conductance (avg) pH Buffer 4.0 Well Depth(O.Olft): 130.00 Casing Volume (V) pH of Water (avg) 4" well:1 ~.3g 1(·653h) 3" Well: 0 (.367h) '--------' 1.44 Well Water Temp. (avg) 1 13. ~q Redox Potential (Eh) 11-;2._1\ __ --' Turbidity ,-I _0 __ -' Weather Condo Ext" Amb. Temp. °C (prior sampling event)I-:S °L Time 11155 I Gal. Purged 1 5d...D~ I Time I \15k I Gal. Purged l.s~ .:2'f I Conductance I 0 c \C, 1 pH I '1.'110 I Conductance I 3615 I pHI 7.41./ I Temp.oC I \"3.~<& I Temp.oC I Y3 .gC, I Redox Potential Eh (mV) I ~ I Redox Potential Eh (mV) I .:2yt I Turbidity (NTU) I ./ I Turbidity (NTU) I ·7 I Time I 1157 I Gal. Purged I Sa.. .31 I Time I 11.5g I Gal. Purged I S:t,7J I Conductance I '3~o~ I pHI 1 .'13 I Conductance I ~oo~ I pHI 7.1[5 I Temp.oC I 1'1.~ \ I Temp.oC I 13.11 I Redox Potential Eh (mV) I ~6Z: I Redox Potential Eh (mV) I .2..0~ I Turbidity (NTU) I .f I Turbidity (NTU) I ,7 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 11-_5_3,;:;"",:",,;,1_6_--.J Pumping Rate Calculation Flow Rate (Q). in gpm. S/60 = ,-I ~_~_3_. __ ---, • ;),17 gallon(s) Time to evacuate two casing volumes (2V) T=2V/Q= 1 .2.'-1'3. \~ 1 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 A\l A L loS ~O} of VOL.s 1 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 13 0 3x40 ml 0 ~ HCL I]f 0 Nutrients 0 0 100 ml 0 0 H2SO4 0 0 Heavy Metals 11§ 0 250ml ~ 0 HN03 1)1 0 All Other Non Radiologics 0 0 250ml 0 0 No Preserv. 0 0 Gross Alpha 0 0 1,000 ml 0 0 HN03 0 0 Other (specify) 0 0 Sample volume 0 0 0 0 If preservative is used, specify Type and Quantity of Preservative: Comment [J See instruction Arr:\)t:~ on 5.;~~~} 014b. ""-0-1\""" ~oll:~"~ ?rt:!I~"+ .ror pw~<. o.,,,J, .s~Mf'):"j e\J-ent . PlAr~~ be'~al"\ o..-t OlbS. ?u. .. ~~ WI!:JI -r~,. ~ tc.hJ of ~Y.5 M;l1lAhj. \0tAt-r,r .-W(A,.l. £'].::(i.(' h('ou.~~ol.o\\-flJ,'~<' Pv..r~~ e.1'I~(.d" o-nJ... ~IHVlplcS v;>c:re collcc.1c-J cd 1.:2,06. l ... ~ 51\-(. iA.1' 1~C>7. Ocp¢h tt> \,.') .... h(' ~.n"'c-"' f\Ar~G ~c.S gt:t,ql '--_______ ----'IDo not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater 2 of 2 Mill -Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) 'OENISONF) ~ MINES ATTACHMENT 1 WHITE MESA URANIUM MILL Attachment 1 , See instruction FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: I MOfl~h It" GrDv.nlk \}jo..f~r ~o II Location (well name):L-1 __ M_W_-_I_L.' _______ -' Sampler Name and initials: 1""10..(11'1 Cor }j 011; '" .. ~/ 1/4 Date and Time for Purgin~L-_V_I_1 /....:.~_D_I_) ____ --.J and Sampling (if different) Well Purging Equip Used: [f[]pump or[[] bailer Well Pump (if other than Bennet) 1 ~eo Sampling Event I J"'T\v..W"~ Mo(\t~ 1 '<1 I {IA vJ-d.£ Prevo Well Sampled in Sampling Event L-_______ ---' pH Buffer 7.0 7.0 pH Buffer 4.0 Specific Conductancell...--_'1_~_q __ ___l".tMHOS/ cm Well Depth(O.Olft): 1.;1$ .7 Depth to Water Before Purgin~ \D~ .1.5 Conductance (avg) Well Water Temp. (avg) I 13.5,3 Weather Condo Time 11500 I Gal. Purged I Conductance I Llog3 I pHI Temp.oC I )~ .55 I Redox Potential Eh (m V) I 3qi I Turbidity (NTU) I • 7 I Time I ) bOd... I Gal. Purged I Conductance I qD~7 I pHI Temp.oC I 1'3.~ I Redox Potential Eh (m V) I 3I:J:..t.., I Turbidity (NTU) I ./ I White Mesa Mill Field Data Worksheet for Groundwater Casing Volume (V) pH of Water (avg) 4" well:1 j ~-().:3 1(·653h) 3" Well:L-. _o __ ....J.(.367h) Redox Potential (Eh) I ~ '----~-:-:-Lj-=3----J TurbiclitylL---_, 7 __ --' Ext" Amb. Temp. °C (prior sampling event)1 _ Y iJ ( I 3S.~D I Time 11.s~J I Gal. Purged I :3 b. D~ I b.36 I Conductance I LjDb.5 I pHI b."35 I Temp.oC I 1:)·53 I Redox Potential Eh (m V) I 3Y5 I Turbidity (NTU) I .7 I :3b.2:3 I Time 1 1503 I Gal. Purged I 36)-L5 I r;·'37 I Conductance I qOcq I pHI b.~7 I Temp.oC 1 13 .59 I Redox Potential Eh (m V) I 3I:J) I Turbidity (NTU) I ' 7 I 1 of2 Mill-Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) Volume of Water Purged I 3b,L{5 gallon(s) Pumping Rate Calculation Flow Rate (Q), in f.'Pm . Time to evacuate two casing volumes (2V) S/60 = I . :;>...n T = 2V /Q = I 11..\7 • 1..5 I Number of casing volumes evacuated (if other than two) If well evacuated to dryness, number of gallons evacuated Name of Certified Analytieal Laboratory if Other Than Energy Lab~L....-.N_/:....;1~ _____ ----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 VOCs 0 0 3x40 ml 0 0 HCL 0 Nutrients 0 0 100 ml 0 0 H2SO4 0 Heavy Metals 0 0 250ml 0 0 HN03 0 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 F=;d~ PH If preservative is used, specify Type and Quantity of Preservative: Comment [j See instruction AH;\l~t\ on ~;h. jl;,t '~JO. J;I'IYW-H~l1 :Il ... ~ present .~,. Fv.r~( 0.[ fJ,vLIY. PIA(~c.. be~c." iht l.:l. IS. ?",r~cJ... \N6H ror 0.. }c>h.\ of' \ b~ M;nV\1c)_ -roo\< pCA('aqY\~:rt:~ for r.·~\A ?)1. D:~ ncJ p\J.\\ OIn~ ,s4f)')p)C~ _ ) Pl.\r(:)<. ~nJ.o~ til.r \SD':>. Li!.ft ~;t( e..~ l.507. w",-\,r \,Jo..s. Gkc..r . DL~~ ,.&1u PV-(~G \A)o.~ \OL.\.SD '--_______ ---'IDo not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater N 0 0 0 0 0 0 2 of2 Mill -Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) : OENISONI)J~ ATTACHMENT 1 Attachment 1 ~ See instruction WHITE MESA URANIUM MILL MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: I M () n H, ''<1 !.rtf) Urld l/\)u..T<r 9,.0 1/ Location (well name):IL--...:...M....:,w_-....;:;..?5--=-________ ---l Sampler Name and initials: I '-;:nncf" Ho]J,d""~/71t Date and Time for Purgin~.L.._l--'I __ t _-_~_()_II ____ -' and Sampling (if different) ;VIA '--~---------~ Well Purging Equip Used: ~pump o@ bailer Sampling Event I Vo..nv.o..r~ M o 11th ,'<"\ pH Buffer 7.0 /·0 Specific ConductanceL..I_Cj_q"-q'--__ ...JI~MHOS/ em Depth to Water Before Purgin~ 7 S .1 b Conductance (avg) 335'"'\ '---------~ Well Pump (if other than Bennet) 1-1 _Q-,-,-~--,f:J=-______ -...J Prevo Well Sampled in Sampling Event 1I-_M_W_->_lJ ____ ----I pH Buffer 4.0 y .O Well Depth(O.Olft): L..I _11_5_.0_0 ____ ----' Casing Volume (V) pH of Water (avg) 4" well:1 2b.D5 1(·653h) 3" Well: 0 (.367h) "-----' Well Water Temp. (avg) 1:',77 Redox Potential (Eh)1 .2..b~ Turbidityl,--l_, ~'---_-' Weather Condo Ext" Amb. Temp. O( (prior sampling event) I ..... StJG I Time I ,:;1..';).5 I Gal. Purged I S'd...D~ I Time I \~~ I Gal. Purged I ~.~£j I Conductance I 33Sg I pHI b..L1 3 I Conductance 13351 I pHI b·LJ~ 1 Temp.oC I 1-:,.'7 I Temp.oC I 13.71; I Redox Potential Eh (mV) I ~~j I Redox Potential Eh (mV) I ~,q I Turbidity (NTU) I '35 I Turbidity (NTU) I .c.r I Time I I~I I Gal. Purged I 5~.S' I Time I l~g I Gal. Purged I ~.73 I Conductance I 333y I pHI ?;;,q~ I Conductance I 3353 I pHI b.qq I Temp.oC I n."78 I Temp.oC I 13.77 I Redox Potential Eh (mV) I ;z..~5 I Redox Potential Eh (mV) I ~'o I Turbidity (NTU) I .~ I Turbidity (NTU) I .'l 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 I 5'3.1 C Pumping Rate Calculation Flow Rate (Q). in gpm. S/60 = I ~ )\l ga"on(s) Time to evacuate two casing volumes (2V) T=2V/Q= I ;2.YO·15 ! 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 Labfl-_,A/,-:...../u.A ______ --.J 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 ml 0 0 H2SO4 0 Heavy Metals (] 0 250ml ~ 0 HN03 fiI All Other Non Radiologics 0 0 250ml 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 If preservative is used, specify Type and Quantity of Preservative: Comment ~ See instruction Arr:,,'C't\ Oil .s;t<.."t o~n1s', '1ot.l\n<r' \-loIJ]~~ ?re~c.t\t-for ?v...-~e Ant!. ~4~f\it1~ -Gvent. f'v.r~L be~/)"I\ ~r O~AS. l\ .... r~'Cb.. I"..)cH SDr ()... tot~\ of ..?,I.J-.S M;nl",-tt~ \k)",h.,. I,.) o.s, ckw +~I'£)~hol.A.t ?W~'t'· rv..r~ ~'(\a~fJ... MIA S~Mf' I eS. INUc. l.o\\~(,-rc:,;l 0-+ \2.36>. D-£.p~k ~I> \t:)~ (,( I-.+l-cr pv.r!::J((. \,V~5. 77# D~ . le,~t-SIft, ~ t \;l3b L...-_______ ---I!Do not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater N 0 0 0 0 0 0 2 of2 Mill-Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) OENISONF) ~ ATTACHMENT 1 Attachment 1 WHITE MESA URANIUM MILL See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: I Mo nth I 1\ &ro~(\a 10~hr :;'0) I Location (well name):L-1 _M_vJ_--=~C-..::... _________ ---, Sampler Name and initials: I ~Me(' Hi) 11 .J ..... /-r/J Date and Time for PurgingjL-....!..I--l)~~:.....:-~==-D.w1 )"-___ ----1 and Sampling (if different) '-//4-~-~-----~ Well Purging Equip Used: [![]pump o@ bailer Sampling Event 0~fllA~r~ MOflth/\I' pH Buffer 7.0 I ,D Specific Conductance 11--_~.:....;~:....:~ __ ----,IIlMHOS/ cm Depth to Water Before Purgin~ 79.0'{ Conductance (avg) Well Pump (if other than Bennet) Prevo Well Sampled in Sampling Event L-1_,_vt_W_-_I'-l _____ --' pH Buffer 4.0 1.../·0 Well Depth(O.Olft): ).;2./-3::> Casing Volume (V) pH of Water (avg) 4" Wel1:~--D---tI(.653h) 3"Wel1:. b . (.367h) Well Water Temp. (avg) I \4·3.;1.. Redox Potential (Eh) I ~73 Turbidity'-I _o ___ --' Weather Condo Ext'l Amb. Temp. °C (prior sampling event) 1 --5 0 (, 1 Time I oq\.j"l 1 Gal. Purged 1 1 Time Gal. Purged 1-1 ___ --' Conductance 1 3bJ[.J 1 pHI b·g3 1 Conductance pHI'--__ ~ Temp.oC I Ig·3~ 1 Temp.oC Redox Potential Eh (m V) 1 "),,73 1 Redox Potential Eh (m V) ,-I ___ ----' Turbidity (NTU) 1 0 1 Turbidity (NTU) I I Time 1 1 Gal. Purged 1 1 Time Gal. Purged 11--___ -' Conductance 1 1 pH 1 1 Conductance pH .... 1 ___ --' Temp.oC 1 I Temp.oC Redox Potential Eh (m V) 1 I Redox Potential Eh (m V) L-I ___ ~ Turbidity (NTU) 1 I Turbidity (NTU) 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 <-I _N....:../'Jo...&?1 ___ -' Pumping Rate Calculation Flow Rate (Q). in gpm. S/60 = 1 5.D ga"on(s) Time to evacuate two casing volumes (2V) T=2V/Q= 1 0 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~,-_".v,_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 11:1 0 3x40 ml 0 ~ HCL ~ 0 Nutrients ~ 0 100 ml 0 IZf H2SO4 IS 0 Heavy Metals ~ 0 250 ml 19 0 RN03 f3 0 All Other Non Radiologies 0 0 250ml 0 0 No Preserv. 0 0 Gross Alpha 0 0 1,000 ml 0 0 RN03 0 0 Other (specify) 129 0 Sample volume 0 ~ 0 ~ t,hlpr·,rlc. ('-<.nc.ro.l :rnor~~ni(. If preservative is used, specify Type and Quantity of ;--D~ Preservative: See instruction Comment Arr;'-l~~ on s;h:. o...t 0 44;;2.. ~rmcr, &t>..rr:'" I R~o.n c;..('(' 0..1\ prc:~~n+ .fo, ~~JV\ f'l;n~ 'G\J4'\+' .s~M~\Q \/-Jere. ?v..\\~o. 6\1 oQStl. Wt;.+~'" wu.s. G),co.(. Len-~I'h= tJ..t 09054. 1-.-_______ ---JIDo not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater 2 of 2 Mill -Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) ATTACHMENT 1 OE N I SONr'l ~ WHITE MESA URANIUM MILL Attachment 1 ./ See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: 1 M 0 1)~\, ''3 G-r-ov.nCI \130..1"(; r ~O) I Location (well name): .... 1 _""_W_-_3;;...O ________ ----l Sampler Name and initials: 1 """6.tln~r H"II;J"~/T~ Date and Time for Purgin~ 1/10 /~Ol) and Sampling (if different) L-.:..:.A/.~y.:";'~ ______ --1 Well Purging Equip Used: I][] pump o@bailerWellPump(ifotherthanBennet) L-I _Q_E:_D ____ ---' Sampling Event l 0:.nv..M~ Mo tI H I A Prevo Well Sampled in Sampling Event .... 1_M_W_-_~_1 ____ _I pH Buffer 7.0 7.D Specific ConductanceL-1 _9.;.-q-"':~ __ ---lI~MHOS/ cm Depth to Water Before Purgin~ 7'. G;,5 Conductance (avg) pH Buffer 4.0 t..j.o Well Depth(O.Olft): 11' o. 00 Casing Volume (V) 4" well:1 ;2.1.77 3" Well: () pH of Water (avg) 1(·653h) (.367h) Well Water Temp. (avg) 1 \t.). '" 1 Redox Potential (Eh) 1 ~8q TurbiditYL-I .....;o::::.....-_-, Weather Condo Ext'l Amb. Temp. DC (prior sampling event)l-l 0 Co. Time 1 l:;"Ob I Gal. Purged I '13. b\ I Time I \J-.D7 I Gal. Purged I l.\3. ~~ I Conductance I )..J LI~ I pHI b.~ I Conductance I ~/L/S I pHI b.65 I Temp.oC I 13 .. Z1~ I Temp.oC I 1'3 .8~ I Redox Potential Eh (mY) I ~87 I Redox Potential Eh (m V) I ~ '1 I Turbidity (NTU) I 0 I Turbidity (NTU) I 0 I Time I '~D~ I Gal. Purged I \.\ IJ . 0,5 I Time I ):l.oq I Gal. Purged I ylj.~b I Conductance I :;l} LJ~ I pHI b.b7 I Conductance I ~L}3 I pH I b.b.5 I Temp.oC I 13.~l5 I Temp.oC I )3.Q/ I Redox Potential Eh (m V) I ;;z..qr I Redox Potential Eh (m V) I ;;.71/ I Turbidity (NTU) I 0 I Turbidity (NTU) I L5 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 '-i q .'1 <t Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = ,-I _" _;1._11 __ ----' gallon(s) Time to evacuate two casing volumes (2V) T=2V/Q= I ~()().7J 1 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 LablL-_.N.....:,.y.:....;'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 [)J 0 100 ml 0 O!/ H2SO4 I5iJ Heavy Metals rn 0 250 ml [)1 0 HN03 ijJ All Other Non Radiologies 0 0 250ml 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 If preservative is used, specify Type and Quantity of Preservative: Comment k1 See instruction Arri\)l!.c>.. On ~;te o-.,-r Og37. --r;.(lt'lc(" Holl,jJ''.i prc..5c./lt for pu.('~c MJ.. ~Mfl :"'J -evcnt. Pv.("~c. b~~",,, to} O~I{S. 'Pv.("~<:~ 10ell tJor ~ ~o1lA.' ~ 2,oS "tn\J\r<-~. \0o..tcr \.0~ cJ-C:II..f th(O~~OI.A.T p~r~ c.. t'V.(~f ~nc).eA 1A.f\A, f,o..yVl pi'S \.)~r( Lbl1eO'C~ 0..:\ UID I D~f}~ ~l> Wr...1 -c.r o...~h.( f",r~:f wc..~ 7~.bS L..-_______ ----IIDo 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) ATTACHMENT 1 OENISONI)~~ WHITE MESA URANIUM MILL Attachment 1 l (~~ See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: I PI onfJ) I tt G=rOLAYlJ \0~ f(.r" ~ 0 II Location (well name):,-I _M_W_-_3_1 _______ ---' Sampler Name and initials: I"'~tln<"-Hcl/;JeA.'f,J/JJ Date and Time for Purgin~ ~ S =1~;~7~oI1 and Sampling (if different) Well Purging Equip Used: ~pump or@] bailer Well Pump (if other than Bennet) I QeD Sampling Event l oo..n""",rj MOfl-thJ;:t Prevo Well Sampled in Sampling Event '-1_/_/_1'1 _____ ---' pH Buffer 7.0 7-() pH Buffer 4.0 l-l .O Specific ConductanceL.1 __ qCi-!.~ __ ---,1 J.!MHOS/ cm Well Depth(O.Olft): 130.0C> Depth to Water Before PurgingJ ~lll.& Casing Volume (V) 4" well:1 3~.73 1(·653h) 3" Well: .v/A (.367h) '--------' Conductance (avg) pH of Water (avg) Well Water Temp. (avg) I 13.S:t,. Redox Potential (Eh)1 33~ Turbid ity L-I -=-1._'f_---l Weather Condo Time 114d-5 I Gal. Purged I f50.~.,q I Conductance 1 18bE I pHI ".S~ I Temp. DC I 13.'41 I Redox Potential Eh (mV) I :3:!! 1 I Turbidity (NTU) 1 1.'\ I Time /14).7 I Gal. Purged I gOt7-;)...., I Conductance I 18~] I pHI b . .5~ I Temp. DC I )3. bl I Redox Potential Eh (mV) I 33~ I Turbidity (NTU) I l.j I White Mesa Mill Field Data Worksheet for Groundwater Ext'l Amb. Temp. DC (prior sampling event)1 LA t; <- _1°(.. Time I J"J.~ I Gal. Purged I 8'0.50 I Conductance I 1~"'7 I pHI 6.5'"1 I Temp. DC I l~ . .sl I Redox Potential Eh (m V) 1 3.:3;). I Turbidity (NTU) I I·g I Time I lyj;g I Gal. Purged I gO.~~ I Conductance I )g c,<:J I pHI 6.b5 I Temp. DC I \ -;) . .5 J<, I Redox Potential Eh (m V) I 3J~ I Turbidity (NTU) I l·1 I 1 of 2 Mill-Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) Volume of Water Purged I ~ I , ~ 7 Pumping Rate Calculation Flow Rate (Q), in gpm. 8/60 = I . ;),oIl gallon(s) Time to evacuate two ca iug volumes (2V) T = 2V/Q = I 3bfe.·~ 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 LablL-_"v.;_z_~ ______ ---, 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 t!J 0 100 ml Heavy Metals 0 0 250 ml All Other Non Radiologies 0 0 250ml Gross Alpha 0 0 1,000 ml Other (specify) 1l:J 0 Sample volume IDS Comment L--_______ ---IIDo not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater Y N 0 0 0 ~ 0 0 0 0 0 0 0 ~ Added Type y HCL 0 H2SO4 l!1 HN03 0 No Preserv. 0 HN03 0 0 If preservative is used, specify Type and Quantity of Preservative: I~ See instruction [.b,.J IY30, N 0 0 0 0 0 !!J 2 of 2 Mill -Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) OENISONI)J~ ATTACHMENT 1 Attachment 1 WHITE MESA URANIUM MILL I' J See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: I Pioll-thl'a Gro...,..t'lJ:W~+~r AD11 Location (well name):LI __ M_W_-_bS ________ --' Sampler Name and initials: I-r;.l"na Holl,lA .. ~ /iH Date and Time for PurgingjL-_l_-_'1 _-_2_0_1_' ____ --' and Sampling (if different) A.I//t L-_______ ---' Well Purging Equip Used: ~pump o@ bailer Sampling Event 10"''''~(''d .Mol\thl'<1 pH Buffer 7.0 7.0 Specific Conductance 1 ..... _'1_'¥l ___ ---'IIlMHOS/ cm Depth to Water Before Purgin~ 75./ D Conductance (avg) Well Pump (if other than Bennet) L-I _Q_B_O ____ --' I MvJ-11 Prevo Well Sampled in Sampling Event '-________ -' pH Buffer 4.0 y .u Well Depth(O.Olft): 115.£>0 Casing Volume (V) pH of Water (avg) 4" well:1 (}k.. DS 1(·653h) 3" Well:. 0 . (.367h) b.L\3 Well Water Temp. (avg) 1 )).77 Redox Potential (Eh)1 ;;....6~ Turbidityl ' .5 b ~ Weather Condo Ext" Amb. Temp. DC (prior sampling event)I -5 0 (, 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.oC I I Temp.oC I I Redox Potential Eh (m V) I I Redox Potential Eh (m V) I I Turbidity (NTU) I I Turbidity (NTU) I 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.oC I I Temp.oC I I Redox Potential Eh (m V) I I Redox Potential Eh (mV) I I Turbidity (NTU) I I Turbidity (NTU) I 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 I OS 3 . ) b gallon(s) Pumping Rate Calculation Flow Rate (Q) in gpm. Time to evacuate two casing volumes (2V) S/60 = I . 'J..17 T=2V/Q= I .;l.YD·/3 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~L. __ ...v._;';;_/1,--_____ -, 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 0 0 3x40 ml 0 0 HCL 0 0 Nutrients 0 0 100 ml 0 0 H2SO4 0 0 Heavy Metals m 0 250ml ~ 0 RN03 'tl 0 All Other Non Radiologies 0 0 250ml 0 0 No Preserv. 0 0 Gross Alpha 0 0 1,000 ml 0 0 RN03 0 0 Other (specify) 0 0 Sample volume 0 0 0 0 If preservative is used, specify Type and Quantity of Preservative: Comment [~1 See instruction '--_______ ----11 Do not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater 2 of 2 TabC2 Field Data Worksheets Accelerated Monitoring March 2011 Mill-Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) OENISONr)~~ ATTACHMENT 1 Attachment 1 WHITE MESA URANIUM MILL r ' See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: 1 p\(A.n\... Gro~Y\a \J~+-e"'" ;:2..01l Location (well name):IL-...JM--'-=-vJ-=----~....;.I ..;...I _______ _____' Sampler Name and initials: I ~11T\U' ~o/l,'~~/Tlt Date and Time for Purgin~ 3/15/2,011 and Sampling (if different) Well Purging Equip Used: IT[] pump o@ bailer Well Pump (if other than Bennet) Sampling Event MOJ)t"hG &W Prevo Well Sampled in Sampling Event L.I __ M_W_-_I....::LJ:....-__ ----I pH Buffer 7.0 /.0 Specific Conductance 1-1 _--l'l ..... q--lq __ ---'I ~MHOS/ cm Depth to Water Before Purgin~ ~ '1.1 q Conductance (avg) pH Buffer 4.0 y.() Well Depth(O.Olft): 130.00 Casing Volume (V) 4" well:1 ~b.53 3" Well: 0 pH of Water (avg) 1(·653h) (.367h) Well Water Temp. (avg) 1 14.~ I Redox Potential (Eh) 1,---1 0---1,Y_--.I Turbidi tY ..... 1 ----'-O __ -J Weather Condo Ext'l Amb. Temp. °C (prior sampling event) I :;;l.. 0 <. Time I 1\'bO I Gal. Purged I S3,Jb I Time I II.SJ I Gal. Purged I 5'3 . .3 8 I Conductance I ~-'\7 I pHI 7. 'i1 I Conductance I ~-'I~ I pH 17'i7 I Temp.oC I Iy . ~;;L. I Temp.oC I lq.go I Redox Potential Eh (m V) [ \51 I Redox Potential Eh (mV) I loS I Turbidity (NTU) I CJ I Turbidity (NTU) I D I Time IllS.l I Gal. Purged I ~~.!2~ I Time I 1153 I Gal. Purged I 53,81 I Conductance I ;)...i';)..b I pHI 7,~ I Conductance I :l7)q I pHI 7. qt.J I Temp.oC I I~· i).;2.. I Temp.oC 11Y.go I Redox Potential Eh (m V) I 159 I Redox Potential Eh (mV) I 103 I Turbidity (NTU) I 0 I Turbidity (NTU) I 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 I 5'1.;2.S gallon(s) Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = I . ')...17 Time to evacuate two casing volumes (2V) T = 2V/Q = I .?..'-IS.OI 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 \JA L I;' d or v 0(,) 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 IlJ 0 3x40 ml 0 EiJ HCL ~ Nutrients 0 0 100 ml 0 0 H2SO4 0 Heavy Metals O!I 0 250ml IE 0 HN03 ~ All Other Non Radiologies 0 0 250ml 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 If preservative is used, specify Type and Quantity of Preservative: See instruction Comment AH ;\l~cl. 0'(\ ~i"t<:. 6..-t Ollie. -]MI'U ~nA (J-M6Y\ r rc:sell.f ~r f'u.f"~~ 4.t1J. -S4.m pJirlj ~\Je..rrf, ?\Ar~e b-e.~(;\'1"\ 6.'+ 07Y5 . Pv.."(~~! Well .tor 0... fO+A.1 oSi :ISO ",FrwJes V0"-+~r LVa.5. c.it!4T +kroU6hov..t-?~r~e.. Pl..\r~-c ~n4e'" At'lJ.. ~"fV\p lt'~ W!::rc: (.o'I~G+ed 0.+ 115S. D~p-rh +0 \.\)(A.+er t?.+\'Cr r\>.(~<: 1..0% g4. 3..!) Len s;t-c 0-...1 ld.-Ol. '--_______ --'IDo 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) OENISONI)~~ ATTACHMENT 1 Attachment 1 WHITE MESA URANIUM MILL [-See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: 1 M~("c.h Grc)u..n~ \J3",,:ter ;;1..011 Location (well name):L-I __ M_\JJ_-_l_q ______ ------' Sampler Name and initials: 1-r""l'IflGr AolI,Jp\!d /TI1 Date and Time for Purgingj 3/11..\ /:2-01) and Sampling (if different) L...-_/V_/1_~ _____ ---J Well Purging Equip Used: ~pump o@bailerWellPump(ifotherthanBennet) ,-I _Q~~,---D ____ ---, Sampling Event I jJ\onfhl~ G-W Prevo Well Sampled in Sampling Event I MW-30 pH Buffer 7.0 7.0 pH Buffer 4.0 Specific ConductanceL-1 _t1--'--q--l,1 __ ---'I~MHos/ cm Well Depth(O.O1 ft): ,--H_J3_._<4_S_--,II:tK 7 D Depth to Water Before Purging/ 103. qs Casing Volume (V) Conductance (avg) pH of Water (avg) Well Water Temp. (avg) I P1.YL\ Redox Potential (Eh) I :s85 4" well:11 b. \ " 3" Well:. b 6·77 1(·653h) (.367h) Turbidity,-I .".C>"--_-" Weather Condo Ext'l Amb. Temp. °C (prior sampling event)1 qo c. Time I )LJL\O I Gal. Purged I 3. \,t-\b I Time 114Yl I Gal. Purged 131. (J) I Conductance I 3~O\ I pHI Co.7e I Conductance I '39 Dl I pHI 6-77 I Temp.oC I ,q ,q:, I Temp.oC I ,q.Lj3 I Redox Potential Eh (mV) I ~99 I Redox Potential Eh (mV) I 3~~ I Turbidity (NTU) I () I Turbidity (NTU) I 0 J Time Ilqq;x: I Gal. Purged I 3 J. 89 I Time I \q43 I Gal. Purged I 3;2... ) I I Conductance I 3qO~ I pH I Ca.;?; I Conductance I ~~O) I pHI Ca.7£:. I Temp.oC I lQ,qs I Temp.oC I 1'1,45 I Redox Potential Eh (mV) I 3~(2 I Redox Potential Eh (mV) I :2J S I Turbidity (NTU) I b I Turbidity (NTU) I Q 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 :)~. S5 gallon(s) Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = I . ;;2.1 7 Time to evacuate two casing volumes (2V) T = 2V /Q = I 193. qs 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~L.._N_/ A ______ --J 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 ml 0 0 H2SO4 0 Heavy Metals 0 0 250ml 0 0 HN03 0 All Other Non Radiologics 0 0 250ml 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 If preservative is used, specify Type and Quantity of Preservative: Comment Arr',\)<:J on ~i+-e 0..1-I?.OD . J;nner H()n ;~U.6 pre.~<nt +0 rv.('~~ wei \ . P\A(,~e.> bej().(\ (At I:US, 'Pv..r~e~ Wd/ for ~ +o~,,\ oJ;' \50 M;r\vct-G$.. w .. \<_ 100..!. G I-a..r + h (0'd'0 v..t PW(\C . .'>0.1"1 pic. Wu'-n o+-r ~ ",;,.,J ~ See instruction 'oc>K. f~r'~W"\·e;hx~ to. ~ ~~ Pit \ ?v.,~-e. ~y1J t!~ ,.J--)'1 Lf£. D-cfA~ +D \0('\'to' o..~-Cf ~w~e., \,()(AS \04.~) L~+-si}c ~J-ILJ'-I7 L...-_______ ---'IDo not touch this cell (SheetNarne) 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) OENISONI)J~ ATTACHMENT 1 Attachment 1 WHITE MESA URANIUM MILL See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: 1 Mo..rc.h GrounJ \lJo...h.(" ;Z:01l Location (well name):L.-1 __ M_W_-_;l,_~ ________ -.J Sampler Name and initials: l=-Ja 1'\ n t:,.r FI 0 III Cl~ If f-I Date and Time for PurgingJ 3 /;L L-~~3~J~15~/~~~o~ll~-~ and Sampling (if different) IV/A L-_______ ~ Well Purging Equip Used:~pump o@ bailer Well Pump (if other than Bennet) I QED '----'---=------' Sampling Event 1 A()n","h\~ &W ! tAW-II Prevo Well Sampled in Sampling Event L.-_______ --' pH Buffer 7.0 7 .0 pH Buffer 4.0 Specific Conductance IL-_~_q_q:......-_~I /lMHOS/ cm Well Depth(O.Olft): 11 105 .00 Depth to Water Before PurgingJ 1LJ. ~ \ Casing Volume (V) 4" well:! ::lG .?-y !(.653h) 3" Well: D (.367h) L.....-___ ~ Conductance (avg) pH of Water (avg) Well Water Temp. (avg) 1 14 . .sCo Redox Potential (Eh) I,-,~:;....;.....:s=---_-" Turbidity I 0 '-------' Weather Condo Ext'l Amb. Temp. °C (prior sampling event) I :;"'0 ,- Time Il~o.S I Gal. Purged 1 53.1b I Time 1 1;;!.Ob I Gal. Purged I S 3. 38 I Conductance 1 3~O9 I pHI b·9 Y I Conductance I 3;;1..05 I pHI b.83 I Temp.oC I ILI .56 I Temp.oC I 19.5J I Redox Potential Eh (m V) I ;).Sq I Redox Potential Eh (mV) I ~~ I Turbidity (NTU) I 0 I Turbidity (NTU) I 0 I Time I 1;1..07 I Gal. Purged I :>3 . .5Q I Time I ]? .. 0 [5 I Gal. Purged I S.3, b I I Conductance I ?>J..D'J I pHI b.~O I Conductance I ~oJ I pHI <;.71 I Temp.oC I lY .S7 I Temp.oC I 1Q.5f.:. I Redox Potential Eh (mV) I ;;.sy I Redox Potential Eh (m V) I ~~ I Turbidity (NTU) I 0 I Turbidity (NTU) I () 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 I 54."; gallon(s) Pumping Rate Calculation Flow Rate (Q), in gpm. Time to evacuate two casing volumes (2V) S/60 = I . J.r7 T = 2V /Q = I ;J. Lj I. 8g ! 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~'-_~_~_~ ______ --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 VOCs 0 0 3x40 m1 0 0 HCL 0 Nutrients 0 0 100 ml 0 0 H2SO4 0 Heavy Metals ~ 0 250ml 2:1 0 HN03 ~ All Other Non Radiologics 0 0 250 ml 0 0 NoPreserv. 0 Gross Alpha 0 0 1,000 ml 0 0 HN03 0 Other (specify) 0 0 Sample volume 0 0 0 If preservative is used, specify Type and Quantity of Preservative: Comment U See instruction A rr;'U-cJ. ()Y) ~i+<.. o..-t 07.53. "Io..nn",.. J.J,,'I:J:J pr~.$U1+ -for ?I.A.G -e "n~ .$~1I1'p 1:~ elJ~..rrf. 'Pv-r~-e. he~o.1\ ",i-O~OO. PlA.,~-t:~ \N-Gl\ .\01'" ~ -\-0+6,.\ Df ;2.50 M:(h.J.~~. 'WlA.ter W~ de().r thro~hov-.i-the P"'("~e.· ?u,Ge. cnJecl tA()~ SO,rtlpk wo..s C.6lJ~c-+eJ o..t ~ JO . Dep-th -to ~U-.-ter lAneY' fu.r~~ W(.L~ 7". '=>0 L~~ ~\i<:. 0..1-)J.J b L..-_______ -----I!Do not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater N 0 0 0 0 0 0 2 of2 MiII-Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) OENISOJ) ~ MINES ATTACHMENT 1 WHITE MESA URANIUM MILL Attachment 1 ~ See instruction FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: 1 j\I\ 0. (' c..£Ol G-.... o !.An v\ Wo...+e. (" ;2,.011 Location (well name):L-1 ---'-M_W_-_;2._b ________ -' Sampler Name and initials: l'Io:nne(' Holl'''GI~/T''/1- Date and Time for Purgin~ 3/lb/a..Oll and Sampling (if different) Well Purging Equip Used: ~ pump o@ bailer Well Pump (if other than Bennet) 1 G-rlAndf'a.s Sampling Event .Mon'fh 19 C;:\fJ I MvJ-.:t5 Prevo Well Sampled in Sampling Event '--_______ -' pH Buffer 7.0 Specific Conductance ,-I _9_4_9 ___ -'1 )lMHOS/ cm Depth to Water Before Purgin~ ~ 3 . 0 ~ Conductance (avg) pH Buffer 4.0 y.o Well Depth(O.Olft): Casing Volume (V) pH of Water (avg) 4" well:~-o=----lI(.653h) 3" Well:. 6 . (.367h) Well Water Temp. (avg) 1 \<a.O;).,. Redox Potential (Eh) 1 :;"'37 TurbiditYL-1 _0...:::....-_--' Weather Condo Ext'l Amb. Temp. °C (prior sampling event)1 7" <. Time Il~'3S I Gal. Purged 1 I Time I I Gal. Purged I I Conductance 1 3 L\bS I pH I 0.&4 I Conductance I I pH I I Temp.oC I \b.DOl I Temp.oC I I Redox Potential Eh (m V) I ~~l I Redox Potential Eh (mV) I I Turbidity (NTU) I b I Turbidity (NTU) I I Time I I Gal. Purged I I Time I I Gal. Purged I I Conductance I I pHI I Conductance I I pH I I Temp.oC I I Temp.oC I I Redox Potential Eh (mV) I I Redox Potential Eh (mV) 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-I __ 0 ___ -1 Pumping Rate Calculation Flow Rate (Q), in gpm. S/60 = I 5. CO gallon(s) Time to evacuate two casing volumes (2V) T=2V/Q= I 0 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.. __ M_v._'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 3x40 rn1 0 129 HCL ~ Nutrients f1 0 100 rn1 0 ~ H2SO4 ~ Heavy Metals t1 0 250 rn1 E 0 RN03 ~ All Other Non Radiologies ~ 0 250 rn1 0 ~ No Preserv. 0 Gross Alpha ~ 0 1,000 rn1 ~ 0 RN03 ~ Other (specify) t::J 0 Sample volume 0 ~ 0 TDS If preservative is used, specify G h \ or'\ J.c Type and Quantity of Preservative: Comment Q See instruction Afr;\l~J. -e0-e1"'+' W o..1-c", On s ii -e. ~+ );1.3.:2." -'-~nn~r, G-"rr,'1'\ J R~o.t) (;.1/ 'fre.ser),r-+6 .... "sG.1VJpl.'n; Too\..-I Sd-6+ J'ar~m~+~f'5, .$~Mflt'.s Werl:. f",J1-e~ (d-1~c.J(j. wo..S Gleo..(" ~ L~J1 ,5,'t(. 4\t );2..50 '--_______ --'IDo not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater N 0 0 0 ~ 0 (] 2 of2 MiII-Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) ATTACHMENT 1 OENISONI)~ ~ WHITE MESA URANIUM MILL Attachment 1 k See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: I A ",r,}, GCCW'lJ\ \Ja..+~r ~o 11 Location (well name): ..... 1 _M_W_-_3_D ________ ---' Sampler Name and initials: ~1\ne.r +.foil .a~lT+t Date and Time for Purgingj 3/ I'll ~O II and Sampling (if different) I....-_,;"I/,_V,_A _____ ---I Well Purging Equip Used:rn]pump o@ bailer Sampling Event Mof1+h8 GW pH Buffer 7.0 7.C> Specific ConductanceL-1 _Q:.....;1....;.4 __ --lII!MHOS/ cm Depth to Water Before Purgingj 7 ~. C::. 4 Conductance (avg) Well Pump (if other than Bennet) IQED I MW-31 Prevo Well Sampled in Sampling Event ..... _______ --.1 pH Buffer 4.0 Lj.O Well Depth(O.Olft): 1 110. OD Casing Volume (V) pH of Water (avg) 4" well:1 :;LI .55 1(·653h) 3" Well: b (.367h) 1....-__ ----' 7.og Well Water Temp. (avg) 114.YC1 Redox Potential (Eh)1 ;1..C/~ Turbidity ..... 1 _0 __ ----' Weather Condo Ext'l Amb. Temp. °C (prior sampling event) I 40 l... Time 1 1 ILlS 1 Gal. Purged 1 y ~.3 1 1 Time 1\146 1 Gal. Purged I 11.;;2.·S3 1 Conductance I d..().s~ 1 pH 17.01 1 Conductance 120S~ 1 pHI 7.0g 1 Temp.oC 1 14.51 1 Temp.oC 11Y·Ed. 1 Redox Potential Eh (m V) 1 ;)...]7 1 Redox Potential Eh (mV) 1 :2..70 1 Turbidity (NTU) 1 0 1 Turbidity (NTU) l 0 1 Time 1 JlYl 1 Gal. Purged 1 4.1..7'1 1 Time Illyg 1 Gal. Purged 1 4 #-. q b 1 Conductance 1 'AOS~ I pH 1 7.D9 1 Conductance 1')...057 I pHI 7.)0 1 Temp.oC I IQ .qj 1 Temp.oC 1 11I.'-I7 I Redox Potential Eh (mV) I ;Lb~ 1 Redox Potential Eh (m V) 1 26Y I Turbidity (NTU) 1 b 1 Turbidity (NTU) 1 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 43 .90 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 1 q g. '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~,-_;1/,_Y._A ______ ....... 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 1B 0 100ml Heavy Metals ~ 0 250ml All Other Non Radiologies 0 0 250ml Gross Alpha 0 0 1,000 m1 Other (specify) 0 0 Sample volume Comment Y N 0 0 0 ~ ~ 0 0 0 0 0 0 0 Added Type y HCL 0 H2SO4 "E1 HN03 ~ No Preserv. 0 HN03 0 0 If preservative is used, specify Type and Quantity of Preservative: ~. See instruction Lor£! N 0 0 0 0 0 0 Arr:~d On sl+< .. + 06;;l.b . "ic:nn<:,.. H.Jlij~ pr e.5"nf.fo,. r"''(j€. a.nJ. -SC<rYlP''''(j e\Jerff. ~v-~~~ 6Zj 0.(\ ~-t OS'30. Pu.r~-e~ Wdl -tor (J... +o+o..( of' ;2..00 M ;nv-t-e.s . u CI-+e.r \0~ L. )-c.lAr +hro~~00-.-\-pv...\jG . Pv...'('~'C. endc~ o-.nA .50.,.,., p)-c...s w<:1'"" c'oll-c.c.+-c.c\ ",t 1150 . D~.p-t~ +0 W~+e.r ~nc(" pv.('~<. ~~ 7q .~~ Le.Pr ~~~~ ~-t ~ liS ~ '--_______ ---'IDO not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater 2 of 2 MiII-Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) Attachment 1 ATTACHMENT 1 ~ OENISONI)J~ WHITE MESA URANIUM MILL See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: I fJ\()"-rc.h GrO\.A(\0\\tJo...1er ::2...011 Location (well name):I ..... _M_w_-_3_l ________ --' Sampler Name and initials: l~f'I(le.(' ~o II ulC7l.!JJT"~ Date and Time for Purgin~ ..... 3_1_1_4_/_'J.t)_I\ ____ __' and Sampling (if different) Well Purging Equip Used: ~pump o@ bailer Well Pump (if other than Bennet) IQED Sampling Event I MOr"\,",\~ GrvJ Prevo Well Sampled in Sampling Event 1'---»_/)_1-1 _____ -" pH Buffer 7.0 /.0 pH Buffer 4.0 q.o Specific Conductance ..... 1 _9_~....:...9 __ -II~MHOS/ cm Well Depth(O.Olft): I )30.00 Depth to Water Before Purginm bg. g g Casing Volume (V) 4" Well: I 34. q I 1(·653h) 3" Well: 0 (.367h) '---__ -I Conductance (avg) pH of Water (avg) 7·47 Well Water Temp. (avg) I 14.C:,t Redox Potential (Eh) 1L-3_b_8 __ -I Turbidity ..... 1 .....::O~_-I Weather Condo Ext'l Amb. Temp. °C (prior sampling event)1 q 0 G Time I lylS I Gal. Purged I ]~.?D I Time I )'-\~b I Gal. Purged I ]q .:J;;t I Conductance I IgOo I pH I 7.S~ I Conductance I l~O() I pH 17.I..JE( I Temp.oC I 14 .6\ I Temp.oC I lY·f,O I Redox Potential Eh (m V) I 37b I Redox Potential Eh (mV) I 3~ I Turbidity (NTU) I Q I Turbidity (NTU) I 0 I Time I 14').1 I Gal. Purged I 7 q . (,:) I Time I 19:HS I Gal. Purged I ::Z~. 8S I Conductance I '79fa I pHI -7.~J I Conductance I I ~QD I pH I 7.YJ I Temp.oC I Pt~1 I Temp.oC I 1 4 ,~1 I Redox Potential Eh (m V) I 3 ro7 I Redox Potential Eh (m V) I ">.b~ I Turbidity (NTU) I D I Turbidity (NTU) I 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 I go . ;;l.~ Pumping Rate Calculation Flow Rate (Q), in gpm. S/60= I .~17 gallon(s) Time to evacuate two casing volumes (2V) T=2V/Q= 13b7.39 ! 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 Labl ..... /II._'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 VOCs 0 0 3x40 ml 0 0 HCL 0 Nutrients ~ 0 100 rn1 0 ~ H2SO4 ~ Heavy Metals 0 0 250ml 0 0 HN03 0 All Other Non Radiologies 0 0 250ml 0 0 No Preserv. 0 Gross Alpha 0 0 1,000 ml 0 0 HN03 0 Other (specify) e 0 Sample volume 0 ~ 0 TD,S If preservative is used, specify Sv-.\+o..+~ Type and Quantity of Preservative: See instruction Comment A {"ri~ed. 6 r1 ~it~ c..:+ O~I '-. -r;nn~r ~ .. J J;J~ presen+.ror pu.r<Je.. a.nJ ..sGt MpJ;\j ~\J~(,-f . 'Pv..r~e. 6~o-.n .1-.+ O ~;;2..0, Pv..r~~J. \,Jell to(' ~ +o+o-.l 0+ 370 M :Yl vJ~. \0(A.te.r ~o.s d eo.r th ro~oV-1-?v.r~<.. ~v-.rC\ c -e.ndeJ. 0..(\0--5c\Mp l<.~ ~t::\<-c.o II cc.+~J t)..~ lL\3D. It:..\l Si t !:, 6\.1-lY36. ~ D~?th +0 \0O>..~t.r ,,+tcr ?V.(~G \0~~ 7;)...3S "-_______ ----I!DO not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater N 0 0 0 0 0 ~ 2 of 2 Mill -Groundwater Discharge Permit Date: 03/22/2010 Rev. 6 Groundwater Monitoring Quality Assurance Plan (QAP) ATTACHMENT 1 OE N I SONr)~ ~ WHITE MESA URANIUM MILL Attachment 1 See instruction MINES FIELD DATA WORKSHEET FOR GROUND WATER Description of Sampling Event: 1 M(A('Gh (,..l"'ov..no. 'NA.+~(' ~o II Sampler Name and initials: 1-r;:",nGT H<:>11 ,-J"j/Tlt Location (well name): .... 1 --'-M_w_-_"..:::.:.o::S ________ --' Date and Time for Purgingj 3/ J 5/ ~O 1/ and Sampling (if different) Well Purging Equip Used:@]pump o@ bailer Well Pump (if other than Bennet) Sampling Event M 0 n+~ 1.:1 6-vJ I MIAJ-JI Prevo Well Sampled in Sampling Event L.. _______ ----J pH Buffer 7.0 7 .D Specific Conductance 1-1 _9:......:q~1 __ -.l1 ~MHOSI cm Depth to Water Before Purgingj 7Y. g I Conductance (avg) 3;;2..07 pH Buffer 4.0 L].O Well Depth(O.Olft): 115.00 Casing Volume (V) pH of Water (avg) 4" Wel1:1 :;l...b.;7..Y 1(·653h) 3" Well:. 0 . (.367h) Well Water Temp. (avg) 14.56 Redox Potential (Eh) I ;;L.5S TurbiditYL..I ---=:::::o __ -, Weather Condo Ext" Amb. Temp. DC (prior sampling event)1 ;;.. 0 ~ Time 1 I Gal. Purged 1 I Time I I Gal. Purged 1 I Conductance I I pH I I Conductance I I pHI I Temp.oC I I Temp.oC I I Redox Potential Eh (mV) I I Redox Potential Eh (mV) I I Turbidity (NTU) I I Turbidity (NTU) I 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.oC I I Temp.oC I I Redox Potential Eh (mV) I I Redox Potential Eh (mV) I I Turbidity (NTU) I I Turbidity (NTU) I 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 I ..s g . :2.S Pumping Rate Calculation Flow Rate (Q), in gpm. S/60= I ·~J7 gallon(s) Time to evacuate two casing volumes (2V) T=2V/Q= I ;).Yl·gS ! 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~L....---..;...v.;":'/':.Lo;4!.-.-_____ .....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 0 0 3x40 ml 0 0 HCL 0 0 Nutrients 0 0 100mI 0 0 H2SO4 0 0 Heavy Metals !]I 0 250mI ~ 0 HN03 IE 0 All Other Non Radiologies 0 0 250ml 0 0 NoPreserv. 0 0 Gross Alpha 0 0 1,000 ml 0 0 HN03 0 0 Other (specify) 0 0 Sample volume 0 0 0 0 If preservative is used, specify Type and Quantity of Preservative: See instruction Comment L...-_______ -----J!DO not touch this cell (SheetName) White Mesa Mill Field Data Worksheet for Groundwater 2 of 2 TabD Quarterly Depth to Water TIME WELL 1458 MW-1 839 MW-2 942 MW-3 943 MW-3A 912 MW-5 909 MW-11 915 MW-12 859 MW-14 857 MW-15 939 MW-17 1456 MW-18 1452 MW-19 1432 MW-20 1438 MW-22 842 MW-23 829 MW-24 903 MW-25 1252 MW-26 826 MW-27 834 MW-28 921 MW-29 922 MW-30 926 MW-31 934 MW-32 848 MW-33 853 MW-34 846 MW-35 Comments: Static level 65.29 109.93 83.50 85.55 106.09 89.37 108.76 104.00 106.75 76.04 74.90 51.30 83.97 67.32 117.43 114.81 74.91 78.68 51.09 77.29 102.58 76.83 69.03 76.56 Dry 108.20 112.67 Quarterly Depth to Water NAME: Garrin Palmer, Ryan Scheirman DATE: 2/28/2011 TIME WELL 1004 MW-4 1001 TW4-1 1007 TW4-2 900 TW4-3 1258 TW4-4 1012 TW4-5 956 TW4-6 1005 TW4-7 932 TW4-8 10lD TW4-9 1015 TW4-10 1016 TW4-11 906 TW4-12 909 TW4-13 912 TW4-14 1252 TW4-15 1020 TW4-16 934 TW4-17 1522 TW4-18 1320 TW4-19 1248 TW4-20 1524 TW4-21 1026 TW4-22 928 TW4-23 1024 TW4-24 925 TW4-25 952 TW4-26 Static Level 75.33 63.84 67.11 49.63 69.05 57.15 70.80 67.14 66.90 54.96 57.10 58.20 39.58 46.84 87.99 78.68 64.76 76.56 57.72 81.03 69.35 59.82 54.51 65.83 56.05 46.73 64.52 TIME WELL 1447 PIEZ-1 1500 PIEZ-2 1503 PIEZ-3 932 PIEZ-4 934 PIEZ-5 1513 TWN-1 1000 TWN-2 1005 TWN-3 1406 TWN-4 1523 TWN-5 1039 TWN-6 1518 TWN-7 1021 TWN-8 1245 TWN-9 1250 TWN-10 1422 TWN-11 1418 TWN-12 1302 TWN-13 1311 TWN-14 1254 TWN-15 1407 TWN-16 1400 TWN-17 1012 TWN-18 1431 TWN-19 All depths were checked. Static Level 62.04 17.20 41.96 48.92 43.91 49.80 16.05 31.61 38.18 70.10 74.78 89.58 61.81 63.91 81.38 69.57 33.89 46.68 62.79 92.45 48.50 34.59 58.10 52.87 TabE Laboratory Analytical Reports -Quarterly Sampling EI\ERGY .\ t-, ~J I . ;. I ~ • I). ' .. www.energylab.com Au/ftIUI£J~SiIu 1m Helena, MT 817-472-0711 • Billings, MT 800·735·4489 . Casper, WY 888-235·0515 Gillette, WY 868·186·7175 • Rapid City, SD 888·672·1225 • Coilege Stalion,1X 888-690·2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: lab ID: 1 st Quarter Groundwater 2011 C 11 020544-001 Client Sample ID: MW-2 Analyses 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 1.1 0.1 0.1 MOC -Minimum detectable concentration Units pC ilL pCi/L pC ilL Qualifiers RL Report Date: 03/24/11 Collection Date: 02/14/11 09:40 DateReceived: 02/18/11 Matrix: Aqueous MCll QCL Method Analysis Date 1 By E900.1 03/02/11 18:26 1 ep E900.1 03/02/11 18:26 1 ep E900.1 03/02/11 18:261 ep MCl -Maximum contaminant level. NO -Not detected at the reporting limit. Page 4 of 44 EN:RGY .,' ,c..H;.-d '--.~I{ • www.energyiab.com Aa/yfIa/ buIIMa ~ 1m Helena, NT 877-472-0711 • Billings, NT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 8&&-186-7175 • Rapid City, SD 888-672-1225 • College Station, 1X 888-&90-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab ID: Denison Mines USA Corp 1 sl Quarter Groundwater 2011 C11020544-002 Client Sample ID: MW-3 Analyses MAJOR IONS Fluoride METALS -DISSOLVED Selenium Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result 0.69 40.5 Units mg/l ug/L Qualifiers Rl 0.10 5.0 Report Date: 03/24/11 Collection Date: 02/15/11 10:35 DateReceived: 02/18/11 Matrix: Aqueous MCU QCl Method Analysis Date 1 By A4500-F C 02/18/11 15:41 1 jba E200.8 02/23/11 02:191 sml MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 5 of 44 EN:RGY _ /\t.o_"')r~i~IL;II~ 0-, www.energylab.com IM/tIIaI buIIItIa SIIa 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 88&-186-7175 • Rapid City, SD 888-672-1225 • College Station, IX 881-680-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: LablD: Denison Mines USA Corp 1 st Quarter Groundwater 2011 C11020544-003 Client Sample ID: MW-3A Analyses MAJOR IONS Sulfate PHYSICAL PROPERTIES Solids, Total Dissolved TDS @ 180 C METALS -DISSOLVED Selenium Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. Result 3730 5770 99.0 D -Rl increased due to sample matrix. Units mg/l mg/l ug/l Report Date: 03/24/11 Collection Date: 02/16/11 10:05 DateReceived: 02/18/11 Matrix: Aqueous MCL! Qualifiers RL QCl Method Analysis Date 1 By D 100 A4500-S04 E 03/03/11 11 :00 Ilr D 17 A2540 C 02/18/11 16:00 1 Imc 5.0 E200.8 02/23/11 04:151 sml MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 6 of 44 EI\ERGY f\(;::)Jo\it.. j/l! os www.energylab.com AM/fIIaI ExuIIIIIa SIIu /151 Helena, MT 877-412-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 888-188-7175 • Rapid City, SD 888-&72-1225 • College Station, TX 888-890-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab ID: Denison Mines USA Corp 1 st Quarter Groundwater 2011 C11020544-004 Client Sample ID: MW-5 Analyses METALS -DISSOLVED Uranium Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. Result Units 29.5 ug/l Qualifiers Rl 0.30 Report Date: 03/24/11 Collection Date: 02/14/11 13:20 DateReceived: 02/18/11 Matrix: Aqueous MCll QCl Method AnalysiS Date 1 By E200.8 02/18/11 22:021 sml MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 7 of 44 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: Denison Mines Project: 1st Quarter Ground Water 2011 Lab Sample ID: 1102080-001A Client Sample ID: MW-ll Collection Date: 2/212011 Received Date: 2/4/2011 Analytical Results Analyzed: 21412011 1406h Units: Ilg/L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr:4-Brornofluorobenzene Surr: Dibrornofluorornethane Surr: Toluene-d8 1250h 1015h Contact: Jo Ann Tischler Method: SW8260C VOAs by GCIMS Method 8260C/5030C CAS Reporting Analytical Number Limit Result Qual 109-99-9 1.00 < 1.00 17060-07-0 77-144 101 460-00-4 80-123 109 1868-53-7 80-124 98.9 2037-26-5 80-125 103 Report Date: 21712011 Page 4 of21 All analyses applicable to the CWA, SDWA, and ReRA are 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 addressec~ Privileges of subsequent use oftbe 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 performance of inspection andlor analysis in good faith and according to the rules of the trade and of science. EI\ERGY \ j.",('" www.energylab.com AnI/ftIuf ExuIIIta SIRU 1m Helena, MT 817·472-0711 • Billings, MT aGO· 735·4489 • Casper, WY 888-235-0515 Gillette, WY 888·188·7175 • Rapid City, SD 188-872·1225 • College Station, ]X 888·690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: LablD: Denison Mines USA Corp 1 st Quarter Groundwater C11020163-001 Client Sample ID: MW-11 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 NO 385 70.6 32 0.48 21.2 0.70 NO 6.83 601 1190 7.80 1980 ND ND ND ND ND ND 63 ND 145 ND ND ND ND ND ND ND 0.42 NO ND 0.1 0.06 0.09 Units mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mglL 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 pCilL pCilL MOC -Minimum detectable concentration Report Date: 03/10/11 Collection Date: 02/02/11 12:50 DateReceived: 02/04/11 Matrix: Aqueous MCU Qualifier RL QCL Method Analysis Date 1 By 0 D A2320 B 02107111 16:51 1 jba A2320 B 02/07/11 16:51 1 jba 0.50 E200.7 02/15/11 15:571 cp A4500-CI B 02/15/11 15:12/1r 0.10 A4500-F C 02/07/11 13:191 jba 0.50 E200.7 02/15/1115:57/cp 0.05 A4500-NH3 G 02111/11 11 :50 1 dc 0.1 E353.2 02104/11 16:46 1 dc 0.50 E200.7 02/15/11 15:571 cp 0.57 E200.7 02/15/1115:57/cp 50 A4500-S04E 02/10/11 11 :31 fir 0.01 A4500-H B 02/04/11 15:31 Ilr 10 A2540 C 02/04/11 15:35/1mc 5.0 E200.8 02/08/11 06:361 sml 0.50 E200.8 02/08/11 06:361 sml 0.50 E200.8 02/08/11 06:36 1 sml 25 E200.8 02/08/11 06:361 sml 10 E200.8 02/08/11 06:361 sml 10 E200.8 02/08/11 06 :36 1 sml 30 E200.7 02115/11 15:57 1 cp 1.0 E200.8 02/08/11 06:361 sml 10 E200.8 02/08/11 06:361 sml 0.50 E200.8 02/08/11 06:361 sml 10 E200.8 02108/11 06:361 sml 20 E200.8 02108/11 06:361 sml 5.0 E200.8 02/08/11 06:361 sml 10 E200.8 02/08/11 06:361 sml 0.50 E200.8 02/08/11 06:361 sml 100 E200.8 02108/11 06:361 sml 0.30 E200.8 02/08/11 06:361 sml 15 E200.8 02/08/11 06:36 1 sml 10 E200.8 02/08/11 06 :36 1 sm I E900.1 03/08/11 18:091 ep E900.1 03/08/11 18:091 ep E900.1 03/08/11 18:091 ep MeL -Maximum contaminant level. ND -Not detected at the reporting limit. o -RL increased due to sample matrix. Page 3 of 28 EN:RGY ...... L • I, ,I ~ ! i' • www.energytab.com AMJytII:M~s.u 1m Helena, MT 871-472-0711 • Billings, MT 800-135-4489 • Casper, WY 888-235-0515 Gillette, WY 8&&-18&-1175 • Rapid City, SO 888-612-1225 • College Station, TX 888-&90-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab ID: Denison Mines USA Corp 1 st Quarter Groundwater C11020163-001 Client Sample ID: MW-11 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-dB Report Definitions: Rl -Analyte reporting limit. QCL -Quality control limit. Result -0.668 32.1 31.6 2130 0.930 ND ND ND ND ND ND ND ND ND ND 102 106 103 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 Qualifier Rl 20 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 80-120 70-130 BO-120 BO-120 Report Date: 03/10/11 Collection Date: 02/02/11 12:50 DateReceived: 02/04/11 Matrix: Aqueous MCL! QCl Method Analysis Date 1 By Calculation 02/16/11 13 :22 1 kbh Calculation 02116/11 13 :22 1 kbh Calculation 02116/11 13:22 1 kbh Calculation 02/16/11 13 :22 1 kbh Calculation 02/16/11 13 :22 1 kbh SW8260B 02/09/11 13:40 1 jlr SWB260B 02/09/11 13 :401 jlr SWB260B 02/09/11 13 :40 1 jlr SW8260B 02109/11 13:40 1 jlr SW8260B 02/09/11 13:40 1 jlr SWB260B 02/09/11 13:40 1 jlr SWB260B 02/09/11 13 :40 1 jl r SVY8260B 02/09/11 13 :40 1 jlr SW8260B 02/09/11 13:401 jlr SW8260B 02/09/11 13 :401 jlr SW8260B 02/09/11 13 :40 1 jlr SWB260B 02/09/11 13 :40 1 jlr SWB260B 02/09/11 13:40 1 jlr SWB260B 02/09/11 13:401 jlr MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 4 of 28 EI\ERGY ,,' :\. ,~) I I /\ r <-. f I" '..) www.energylab.com AM/ffIt:M rxau-. SIIa 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 Gillette, WY 88B-188-7115 • Rapid City, SD 888-&72-1225 • College Station, IX 888-&90-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp 1 st Quarter Groundwater 2011 C11020544-005 Client Sample 10: MW·12 Analyses METALS -DISSOLVED Selenium Report Definitions: Rl . Analyte reporting limit. QCl • Quality control limit. Result Units 39.0 ugiL Qualifiers Rl 5.0 Report Date: 03/24/11 Collection Date: 02/15/11 07:50 DateRecelved: 02/18/11 Matrix: Aqueous MCL! QCl Method Analysis Date 1 By E200.8 02/23/11 04:221 sml MCl -Maximum contaminant level. NO . Not detected at the reporting limit. Page 8 of 44 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: Denison Mines Project: Lab Sample ID: 1st Quarter Ground Water 2011 l102168-001A Client Sample ID: MW-14 Collection Date: 21712011 Received Date: 2/1112011 Analytical Results Analyzed: 2111/2011 1137h Units: )lg/L Dilution Factor: I Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 1300h 0945h Contact: Jo Ann Tischler Method: SW8260C 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 99.7 460-00-4 80-123 108 1868-53-7 80-124 99.2 2037-26-5 80-125 103 Report Date: 2/17/2011 Page 4 of21 All analyses applicable to the CWA, SDWA. and RCRA are perfonned in accordance to NELAC protocols. Pertinent sampling information is located on the attached cac. This report is provided for the exclusive use of the addressee. Privileges ofsubsequent use of the 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 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 to the rules ofthe trade and of science. EN:RGY AI ~)I ' I (,1 II "_I www.anergylab.com AMIyf/f:M ~ SIIu '112 Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 888-888-7175 • Rapid City, SD 888-672-1225 • College Station, "IX 888-690-221 8 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Lab ID: C11020352-001 Client Sample 10: 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 ND 475 514 20 0.15 151 0.05 ND 11.5 334 2180 7.18 3510 ND ND 1.09 ND ND ND ND ND 2020 ND ND ND ND ND ND ND 61.3 ND 11 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 pCi/L pCilL pCi/L MDC -Minimum detectable concentration Report Date: 03/15/11 Collection Date: 02/07/11 1 3 :00 DateRece Ived: 02/11/11 Matrix: Aqueous MCL! Qualifiers RL QCL Method Analysis Date 1 By D D D A2320 B 02/15/11 16 :20 1 jba A2320 B 02/15/11 16:201 jba E200.7 02/25/11 12:561 cp A4500-CI B 02/15/1115:4511r 0.10 A4500-F C 02/11/11 14:141 jba 0.5 E200.7 02/25/11 12:56 1 cp 0.05 A4500-NH3 G 02/14/11 12:28 1 dc 0.1 E353.2 02/15/11 13:05 1 dc 0.5 E200.7 02/25/11 12:56 1 cp 1 E200.7 02125/11 12:561 cp 50 A4500-S04 E 02/17/1115:3811r 0.01 A4500-H B 02/11/11 14:36 IImc 10 A2540 C 02111/11 14:29 IImc 5.0 E200.8 02/16/11 23:301 sml 0.50 E200.8 02/15/11 20:11 1 sml 0.50 E200.8 02/15/11 20:11 I sml 25 E200.8 02/15/11 20:11 I sml 10 E200.8 02116/11 23:30 I sml 10 E200.8 02/15/11 20:11 I sml 30 E200.7 02/25/11 12:56 1 cp 1.0 E200.8 02/15/11 20:11 I sml 10 E200.8 02/16/11 23:301 sml 0.50 E200.8 02/16/11 23:301 sml 10 E200.8 02/15/11 20:11 1 sml 20 E200.8 02/16/11 23:301 sml 5.0 E200.8 02/16/11 23:301 sml 10 E200.8 02/16/11 23:301 sml 0.50 E200.8 02116/11 23:301 sml 100 E200.8 02/16/11 23:30 I sml 0.30 E200.8 02/16/11 23:30 I sml 15 E200.8 02/16/11 23:30 I sml 10 E200.8 02/16/11 23:30 I sml E900.1 02/23/11 05:251 ep E900.1 02/23/11 05:251 ep E900.1 02/23/11 05:251 ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 3 of 31 EN:RGY /. t '.,):. ~', 1'. j /1 ') www.energyiab.com AMIIfkM~SIIu 1m Helena, MT877-472-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 Gillette, WY 8&8-188-7175 • Rapid City, SD 888-&12-1225 • Collaga Station, TX 888-&80-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Lab ID: 1 st Quarter Groundwater 2011 C11020352-001 Client Sample ID: 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-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result -0.752 53.7 52.9 3470 1.01 ND ND ND ND ND ND ND ND ND ND 104 110 99.0 102 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: 03/15/11 Collection Date: 02/07/11 13:00 DateReceived: 02/11/11 Matrix: Aqueous MCU QCL Method Analysis Date 1 By Calculation 03/10/11 13:01 1 kbh Calculation 03110/11 13:011 kbh Calculation 03110/11 13:011 kbh Calculation 03/10/11 13:01 1 kbh Calculation 03/10/11 13:011 kbh SW8260B 02111/11 21 :31 1 ilr SW8260B 02/11/11 21 :31 1 ilr SW8260B 02/11/11 21 :31 1 ilr SW8260B 02/11/11 21 :31 1 ilr SW8260B 02/11/11 21 :311 ilr SW8260B 02111/11 21 :31 1 ilr SW8260B 02/11/11 21 :311 ilr SW8260B 02/11/11 21 :311 ilr SW8260B 02/11/11 21 :31 1 ilr SW8260B 02/11/11 21 :31 1 ilr SWB260B 02/11/11 21 :311 ilr SWB260B 02/11/11 21 :31 1 ilr SW8260B 02/11/11 21 :31 1 ilr SWB260B 02/11/1121 :31/ ilr MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 4 of 31 EN:RGY /\, " ) r .;\ I \ I ~ I -. www.energylab.com AMIIfIat rxc.tIMa SIJu laz Helena, MT 877·472·0711 • Billings, MT 800·735-4489 . Casper, WY 888·235·0515 Gillette, WY 88&·188·7175 . Rapid City, SD 888·&12·1225 . College Station, TX 88&'&90·2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp 1 st Quarter Groundwater 2011 C 11020544-006 Client Sample 10: MW-18 Analyses MAJOR IONS Sulfate PHYSICAL PROPERTIES Solids, Total Dissolved TDS @ 180 C METALS· DISSOLVED Thallium Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. Result 1770 3250 3.49 D -Rl increased due to sample matrix. Units mg/l mg/L ug/l Report Date: 03/24/11 Collection Date: 02/15/11 14:40 DateRecelved: 02/18/11 Matrix: Aqueous MCL! Qualifiers RL QCL Method Analysis Date 1 By D 50 A4500-S04 E 03/03/11 11 :04/1r 10 A2540 C 02118/11 16:00 lime 0.50 E200.8 02/23/11 04:291 sml MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 9 of 44 A ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 1st Quarter Ground Water 2011 1102272-001A AMERICAN Client Sample ID: MW-20 Collection Date: 2/16/2011 1045h 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 lose Rocha QA Officer Received Date: 2118/2011 0930h Analytical Results Analyzed: 2119/2011 1338h 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 Method: SW8260C VOAs by GC/MS Method 8260C/S030C CAS Reporting Analytical Number Limit Result Qual 109-99-9 1.00 < 1.00 17060-07-0 77-144 108 460-00-4 80-123 105 1868-53-7 80-124 101 2037-26-5 80-125 99.4 Report Date: 2/22/2011 Page 4 of 25 All analyses applicable to the CWA, SDWA, and ReRA arc performed in accordance to NELAC protocols. Pertinent sampling information is Located on the attached cae. This report is provided for tbe exclusive use of the addressee. Privileges ofsubscqucnt use of the name of this company or any member of its staff, or reproduction oflhis 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 perfonnaDcc ofinspeclion endlor analysis in good faith and according to the rules of the trade and of science. EN:RGY ;, " )II/'ll III' " www.energyiab.com ANIrtfuI buIIHDI SI«.t I 1St Helena, lIlT 877-472-0711 • Billings, MT BOO-735-4489 • Cesper, WY 888-235-0515 Gillette, WY B86-888-7175 · Rapid City, SD 88B-&12-1225 . ColiegeSlalion, 1XIBH-BBO-221B LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Lab 10: C11020544-008 Client Sample 10: MW-20 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 NO 217 336 64 0.35 86.9 0.06 4.1 43.6 1260 3140 7.94 5380 NO NO NO NO NO NO NO NO NO NO 10 NO NO NO NO NO 6.95 NO 31 0.6 0.1 0.1 Units mg/l mg/L mg/L mg/L mg/L mg/L mglL mglL 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 pCi/L pCi/L MDC -Minimum detectable concentration Report Date: 03/24/11 Collection Date: 02/16/11 1 0 :45 DateReceived: 02/18/11 Matrix: Aqueous MCL! Qualifiers Rl QCl Method Analysis Date 1 By 0 0 0 0 0 A2320 B 02118111 19:421 jba A2320 B 02118111 19 :42 1 jba E200.7 02/25/11 13:161 cp 1 A4500-CI B 02/28/11 10:59 Ilr 0.10 A4500-F C 02118/11 15:441 jba 0.5 E200.7 02/25/11 13:161 cp 0.05 A4500-NH3G 02125/11 12:161 dc 0.5 E353.2 02/23/11 12:421 dc 0.5 E200.7 02/25/1113:16/cp 1 E200.7 02/25/11 13:161 cp 50 A4500-S04 E 03/03/11 11 :05 IIr 0.01 A4500-H B 02/18/11 15:41 IIr 17 A2540 C 02/18/11 16:001lmc 5.0 E200.8 02123/11 04:351 sml 0.50 E200.8 02/23/11 04:35 1 sml 0.50 E200.8 02/23/11 04:35 1 sml 25 E200.8 02/23/11 04:35 1 sml 10 E200.8 02123/11 04:35 1 sml 10 E200.8 02123/11 04:35 1 sml 30 E200.7 02125/11 13:161 cp 1.0 E200.8 02/23/11 04:35 1 sml 10 E200.8 02/23/11 04:351 sml 0.50 E200.8 02/23/11 04:351 sml 10 E200.8 02/23/11 04:351 sml 20 E200.8 02/23/11 04:351 sml 5.0 E200.8 02123/11 04:351 sml 10 E200.8 02/23/11 04:351 sml 0.50 E200.8 02/23/11 04:351 sml 100 E200.8 02/23/11 04:351 sml 0.30 E200.8 02/23/11 04:351 sml 15 E200.8 02/23/11 04:351 sml 10 E200.8 02123/11 04:351 sml E900.1 03/02/11 18:261 ep E900.1 03/02/11 18 :26 1 ep E900.1 03/02111 18:261 ep MCL -Maximum contaminant level. NO -Not detected at the reporting limit. o -RL increased due to sample matrix. Page 11 of 44 EN:RGY ''\1 c..H'!"t ,{I ',:0 www.energylab.com AMIyIfM~SI1Iu 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 Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Lab 10: C11020544-008 Client Sample 10: MW-20 Analyses Result DATA QUALITY AlC Balance (± 5) 5.69 Anions 71.1 Cations 79.7 Solids, Total Dissolved Calculated 5090 TDS Balance (0.80 -1.20) 1.06 -The Anion I Cation balance was confirmed by re-analysis. VOLA TILE 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 timit. ND ND ND ND ND ND ND ND ND ND 108 116 105 84.0 Report Date: 03/24/11 Collection Date: 02/16/11 10:45 DateReceived: 02/18/11 Matrix: Aqueous MCL! Units Qualifiers RL QCL Method Analysis Date 1 By % Calculation 03/23/11 15:551 sdw meq/l Calculation 03123/11 15:551 sdw meq/l Calculation 03123/11 15:551 sdw mg/l Calculation 03/23/11 15:551 sdw Calculation 03/23/11 15:551 sdw ug/L 20 SW8260B 02/26/11 00:30 1 jlr ug/L 1.0 SW8260B 02/26/11 00:301 jlr ug/l 1.0 SW8260B 02/26/11 00:301 jlr ug/l 1.0 SW8260B 02/26/11 00:30 1 jlr ug/l 1.0 SW8260B 02/26/11 00:301 jlr ug/l 20 SW8260B 02/26/11 00:301 jlr ug/L 1.0 SW8260B 02/26/11 00:301 jlr ug/L 1.0 SW8260B 02/26/11 00:301 jlr ug/L 1.0 SW8260B 02/26/11 00:301 jlr ug/L 1.0 SWB260B 02/26/11 00:30 1 jlr %REC 80-120 SW82608 02/26/11 00:301 jlr %REC 70-130 SW8260B 02/26/11 00:301 jlr %REC 80-120 SW8260B 02/26/11 00:301 jlr %REC 80-120 SW8260B 02/26/11 00:301 jlr MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 12 of 44 A ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 1st Quarter Ground Water 2011 1102168-002A AMERICAN Client Sample ID: MW-22 Collection Date: 2/8/2011 1215h 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 Received Date: 2111/2011 0945h Analytical Results Analyzed: 2111/20 II 1156h Units: J.1glL Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 Contact: Jo Ann Tischler Method: SW8260C VOAs by GC/MS Method 8260CIS030C CAS Reporting Analytical Number Limit Result Qual 109-99-9 1.00 < 1.00 17060-07-0 77-144 99.4 460-00-4 80-123 110 1868-53-7 80-124 99.7 2037-26-5 80-125 103 Report Date: 2/17/2011 Page 5 of21 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 use of the name of this company or any member of its statT, or reproduction of this report in connection with the adverlisement, promotion or sale of any prodLlct or process, or in connection witb 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 andlor analysis in good faith and according to the rules of the trade and of science. EN:RGY .~, ( ): • "I' ;. • www.energylab.com AII/yfkIII £mflll&dtllU 1m Haiena, MT 877·472-0711 • Billings, MT 80D·735·4489 • Casper, WY 881·235·D515 Gillatta, WY 88&·186·7175 • Rapid City, SD 888·&72·1225 • Collage Station, 1X aB8-6BD-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Lab ID: Cll020352-002 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 RADIONUCLlDES· 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 ND 565 440 57 3.09 803 0.13 2.5 21 .5 258 4490 6.35 6800 ND 2.31 85.0 ND 267 ND ND ND 28600 ND 719 130 12.0 ND 1.12 ND 44.4 ND 511 9.5 1.1 0.6 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: 03/15/11 Collection Date: 02/08/11 12:15 DateRecelved: 02/11 III Matrix: Aqueous MCU Qualifiers Rl QCl Method Analysis Date 1 By D D D D D A2320 B 02/15/11 16:28 1 jba A2320 B 02/15/11 16:281 jba 2 E200.7 02/16/11 18:22 I cp A4500-CI B 02/15/11 15:48 Ilr 0.10 A4500-F C 02/11/11 14: 17 I jba 0.5 E200.7 02/16/11 18:22 I cp 0.05 A4500-NH3 G 02114/11 12:30 I dc 0.2 E353.2 02l15/1113:08/dc 0.5 E200.7 02116/11 18:221 cp 3 E200.7 02116/11 18:221 cp 100 A4500-S04 E 03/03/11 10:50/1r 0.01 A4500-H B 02/11/11 14:40 1 Imc 16 A2540 C 02/11/11 14:30 IImc 5.0 E200.8 02/16/11 23:371 sml 0.50 E200.8 02/15/11 20:181 sml 0.50 E200.8 02115/11 20:18 1 sml 25 E200.8 02/15/11 20:181 sml 10 E200.8 02/16/11 23:371 sml 10 E200.8 02/15/1120:18/sml 30 E200.7 02/16/11 18:221 cp 1.0 E200.8 02/15/11 20:181 sml 10 E200.8 02/16/11 23:37 I sml 0.50 E200.8 02/16/11 23:371 sml 10 E200.8 02/15/11 20:181 sml 20 E200.8 02116/11 23:371 sml 5.0 E200.8 02116/11 23:371 sml 10 E200.8 02116/11 23:371 sml 0.50 E200.8 02115/11 20:181 sml 100 E200.8 02/16/11 23:371 sml 0.30 E200.8 02/16/11 23:371 sml 15 E200.8 02/16/11 23:37 1 sml 10 E200.8 02/16/11 23:371 sml E900.1 02/17/11 18:041 ep E900.1 02/17/11 18:041 ep E900.1 02/17/11 18:041 ep MCL - Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 5 of 31 EN:RGY • , I ) r ,,\j ( • ~. • www.energylab.com AMIIbI~st.u 1m Holen., MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillatto, WY 88&-188-7175 • Rapid City, SO 888-&72-1225 • Collage Station, IX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: LablD: 1 st Quarter Groundwater 2011 Cll020352-002 Client Sample ID: MW-22 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: 1,2-0ichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result -2.33 105 99.8 6370 1.07 ND ND ND ND NO ND ND ND ND ND 102 106 99.0 101 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: 03/15/11 Collection Date: 02/08/11 12:15 DateReceived: 02/11/11 Matrix: Aqueous MCU QCL Method Analysis Date I By Calculation 03/10/11 13:02 I kbh Calculation 03/10/11 13 :02 I kbh Calculation 03/10/11 13:02 I kbh Calculation 03/10/11 13:02 I kbh Calculation 03/10/11 13 :02 I kbh SW8260B 02/11 III 22:07 I jlr SW8260B 02/11 III 22:07 I jlr SW8260B 02/11 III 22:07 I jlr SW8260B 02/11 III 22:07 I jlr SW8260B 02/11/11 22:07 I jlr SW8260B 02/11 III 22 :07 I jlr SW8260B 02/11/11 22:07 I jlr SW8260B 02/11 III 22:07 I jlr SW8260B 02/11/11 22 :07 I jlr SW8260B 02111 III 22:07 I jlr SW8260B 02111/11 22:07 I jlr SW8260B 02111 III 22:07 I jlr SW8260B 02/11 III 22:07 I jlr SW8260B 02/11 III 22:07 I jlr MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 6 of 31 EN:RGY /.' )1 .1' I :,' • www.energylab.com IMI!f/aI~SIItu 1m Helena, lilT 877-472-0711 • Billings, MT 80D·735·4489 • Casper, WY 888-235·1515 Gillette, WY 888·18&·7175 · Rapid City, SD 888·612·1225 · College Station, IX 881-81D-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab ID: Denison Mines USA Corp 1 st Quarter Groundwater 2011 C11020352-006 Client Sample ID: MW-24 Analyses METALS· DISSOLVED Cadmium Thallium Report Definitions: Rl -Analyte reporting limit. QCL -Quality control limit. Result 2.78 1.42 Units ug/l ug/l Qualifiers RL 0.50 0.50 Report Date: 03/15/11 Collection Date: 02/10/11 08:00 DateReceived: 02/11/11 Matrix: Aqueous MCU QCL Method Analysis Date 1 By E200.6 02/15/11 20:321 sml E200.6 02/17/11 00:19/ sml MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 11 of 31 A ORGANIC ANALYTICAL REPORT 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: Denison Mines Project: 1st Quarter Ground Water 2011 Lab Sample ID: 1102080-002A Client Sample ID: MW-25 Collection Date: 2/2/2011 l310h Received Date: 2/412011 Analytical Results Analyzed: 2/4/2011 1425h Units: Jlg/L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 lO15h Contact: Jo Ann Tischler Method: SW8260C VOAs by GC/MS Method 8260CI5030C CAS Reporting Analytical Number Limit Result Qual 109-99-9 1.00 < 1.00 17060-07-0 77-144 100 460-00-4 80-123 109 1868-53-7 80-124 99.2 2037-26-5 80-125 102 Report Date: 21712011 Page 5 of21 All analyses applicable to the CWA, SDWA, and RCRA are performed in accordance to NELAC protocols. Pertinent sampling infonnation is located on the attached COCo This report is provided for tbe exclusive use of the addressee. Privileges of subsequent usc cflbe name aflhis company or any member of its staff, or reproduclion aflhis 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 thaD for the addressee will be granted only on conlact. This company accepts DO responsibility except for the due perfonnancc of inspection andlor analysis in good faith and according to the rules of the trade and ofscience4 EI\ERGY ,r, -. )luu( , •• " www.energylab.com AMI!fIt:M~SIirCI' 1m Helena, MT 871·472·0711 • Billings, MT 800·735·4489 • Casper, WY 888·235·0515 Gillette, WY 888·188·7175 • Rapid City, SO 888·672·1225 • Collage Station, TX 888·&90·2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater LablD: C11020163-002 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 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 405 358 30 0.31 119 0.49 ND 9.26 298 1690 7.25 2720 ND ND 1.34 ND 11 ND ND ND 1650 ND ND ND ND ND 0.93 ND 4.77 ND ND 0.6 0.09 0.09 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: 03/10/11 Collection Date: 02/02/11 13:10 DateReceived: 02/04/11 Matrix: Aqueous MCL! Qualifier RL QCL Method Analysis Date 1 By D D D A2320 B 02/07/11 16:591 jba A2320 B 02/07/11 16:591 jba 1.1 E200.7 02/15/11 16:051 cp A4500-CI B 02/15/1115:14/1r 0.10 A4500-F C 02/07/11 13 :22 1 jba 0.50 E200.7 02/15/11 16:051 cp 0.05 A4500-NH3 G 02/11/11 11 :52 1 dc 0.1 E353.2 02/04/11 16 :49 1 dc 0.50 E200.7 02/15/11 16:051 cp 1.4 E200.7 02/15/11 16:051 cp 50 A4500-S04 E 02/10/11 11 :48 1 Ir 0.01 A4500-H B 02104/11 15:441 Ir 10 A2540 C 02/04/11 15:351 Imc 5.0 E200.8 02/08/11 07:041 sml 0.50 E200.8 02/08/11 07:041 sml 0.50 E200.8 02/08/11 07:041 sml 25 E200.8 02/08/11 07:041 sml 10 E200.8 02/08/11 07:041 sml 10 E200.8 02/08/11 07:041 sml 30 E200.7 02/15/11 16:051 cp 1.0 E200.8 02/08/11 07:041 sml 10 E200.8 02/08/11 07:041 sml 0.50 E200.8 02/08/11 07:041 sml 10 E200.8 02/08/11 07:041 sml 20 E200.8 02/08/11 07:041 sml 5.0 E200.8 02/08/11 07:041 sml 10 E200.8 02/08/11 07:041 sml 0.50 E200.8 02/08/11 07:041 sml 100 E200.8 02/08/11 07:041 sml 0.30 E200.8 02/08/11 07:041 sml 15 E200.8 02/08/11 07:041 sml 10 E200.8 02/08/11 07 :04 1 sm I E900.1 03/08/11 18:091 ep E900.1 03/08/11 18:091 ep E900.1 03/08/11 18:091 ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 5 of 28 EN:RGY ," ",-)I "~I r ',_ .... www.energylab.com AMIytIuf~, SIRu 1m Helena, tIT 877-472-0711 • Billings, tIT 800-735-4489 . Casper, WY 888-235-0515 Gillette, WY 886-888-7175 • Rapid City, SD 888-672-1225 • College Station, TJ( 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp 1 st Quarter Groundwater C11020163-002 Client Sample 10: MW-2S 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 -2.09 42.7 40.9 2720 1.00 ND ND ND ND ND ND ND ND ND ND 99.0 108 100 100 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 Qualifier 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: 03/10/11 Collection Date: 02/02/11 13:10 DateReceived: 02/04/11 Matrix: Aqueous MCL! QCL Method Analysis Date 1 By Calculation 02/16/11 13 :22 1 kbh Calculation 02116/11 13 :22 1 kbh Calculation 02116/11 13 :22 1 kbh Calculation 02/16/11 13 :22 1 kbh Calculation 02/16/11 13:221 kbh SW8260B 02/09/11 14:161 ilr SW8260B 02/09/11 14:161 ilr SW8260B 02/09/11 14:161 ilr SW8260B 02/09/11 14:161 ilr SW8260B 02/09/11 14:161 ilr SW8260B 02/09/11 14:161 ilr SW8260B 02/09/11 14:161 ilr SW8260B 02/09/11 14:161 ilr SW8260B 02/09/11 14:161 ilr SW8260B 02/09/11 14:161 ilr SW8260B 02/09/11 14:161 ilr SW8260B 02/09/11 14:161 ilr SW8260B 02/09/11 14:161 ilr SW8260B 02/09/11 14:16 1 ilr MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 6 of 28 A ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 1st Quarter Ground Water 2011 1102272-002A AMERICAN Client Sample ID: MW-26 Collection Date: 2116/2011 1226h 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 Received Date: 2118/2011 0930h Analytical Results Analyzed: 2119/2011 1357h Units: flg/L Dilution Factor: 1 Compound Tetrahydrofuran SUIT: 1,2-Dichloroethane-d4 SUIT: 4-Bromofluorobenzene SUIT: Dibromofluoromethane SUIT: Toluene-d8 Contact: Jo Ann Tischler Method: SW8260C VOAs by GC/MS Method 8260C/5030C CAS Reporting Analytical Number Limit Result Qual 109-99-9 1.00 < 1.00 17060-07-0 77-144 109 460-00-4 80-123 106 1868-53-7 80-124 105 2037-26-5 80-125 99.8 Report Date: 2/22/2011 Page 5 of 25 All analyses applicable to the CWAt 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 ofsubseql1ent use oftbe name oftbis 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 perfonnance of inspection and/or analysis in good faith and according to the rules of the trade and of science. EN:RGY ,~,I (~H;'I ' Jllh ~ www.energylab.com AIuIyfIt:M ExuIIIta SIIIu 1m Helena, lIfT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 881-235-0515 Gillette, WY 886-188-7115 • Rapid City, SD 888-&72-1225 • College Station, IX 888-680-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 LablD: Cll020544-009 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 (±l Gross Alpha minus Rn & U MDC Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result ND 418 511 59 0.25 168 0.25 0.6 11.2 174 1780 7.65 3270 ND ND ND ND ND ND 606 ND 1470 ND ND ND 7.6 ND ND ND 69.3 ND ND 3.0 0.2 0.1 Units mglL 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: 03/24/11 Collection Date: 02/16/11 12:26 DateReceived: 02/18/11 Matrix: Aqueous MCL! Qualifiers Rl QCl Method Analysis Date I By D D D A2320 B 02/18/11 19:501 jba A2320 B 02/18/11 19:50 I jba E200.7 02/25/11 13:20 I cp 1 A4500-CI B 02/28/11 11 :01 Ilr 0.10 A4500-F C 02/18/11 15:471 jba 0.5 E200.7 02/25/11 13:20 I cp 0.05 A4500-NH3 G 02/25/11 12:181 dc 0.1 E353.2 02/23/11 12:491 dc 0.5 E200.7 02/25/11 13 :20 I cp 1 E200.7 02/25/11 13 :20 I cp 50 A4500-S04 E 03/03/11 12:01 Ilr 0.01 A4500-H B 02118/11 15:46 IIr 10 A2540 C 02/18/11 16:00 Ilmc 5.0 E200.8 02/23/11 04:421 sml 0.50 E200.8 02/23/11 04:42 I sml 0.50 E200.8 02/23/11 04:421 sml 25 E200.8 02/23/11 04:421 sml 10 E200.8 02123/11 04:421 sml 10 E200.8 02123/11 04:42 I sml 30 E200.7 02125/11 13:201 cp 1.0 E200.8 02123/11 04:421 sml 10 E200.8 02/23/11 04:421 sml 0.50 E200.8 02/23/11 04:421 sml 10 E200.8 02/23/11 04:421 sml 20 E200.8 02/23/11 04:421 sml 5.0 E200.8 02/23/11 04:421 sml 10 E200.8 02/23/11 04:421 sml 0.50 E200.8 02/23/11 04:421 sml 100 E200.8 02123/11 04:421 sml 0.30 E200.8 02123/11 04:421 sml 15 E200.8 02123/11 04:421 sml 10 E200.8 02/23/11 04:421 sml E900.1 03/02/11 18 :26 I ep E900.1 03/02111 1 B :26 I ep E900.1 03/02111 1 B:261 ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 13 of 44 EN:RGY •• ' \) 11 .A~ 1 (.-..:.J I [ ~ I www.energylab.com AtJMytkM~ss-1m Helena, MT Bl1-412-e711 • Billings, MT 800-135-4489 • Casper, WY 888-235-1515 GiIIBlte, WY 888-188-1115 • Rapid City, SD 888-612-1225 • Colisge Station, IX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: LablD: 1 st Quarter Groundwater 2011 C 11020544-009 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: 1,2-0ichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result 1.67 45.7 47.2 2930 1.12 ND ND ND 730 ND ND 10 NO NO NO 112 120 109 B4.0 0-RL increased due to sample matrix. 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 Report Date: 03/24/11 Collection Date: 02/16/11 12:26 DateReceived: 02/18/11 Matrix: Aqueous MCU Qualifiers RL QCL Method Analysis Date 1 By Calculation 03/14/11 08:231 kbh Calculation 03114/11 08 :23 1 kbh Calculation 03114/11 08:23 1 kbh Calculation 03/14/11 08:231 kbh Calculation 03114/11 08:231 kbh 20 SW8260B 02126/11 07:031 ilr 1.0 SW8260B 02126/11 07:03 1 ilr 1.0 SW8260B 02/26/11 07:03 1 ilr D 100 SW8260B 02/26/11 05: 151 ilr 1.0 SW8260B 02/26/11 07:03 1 ilr 20 SW8260B 02/26/11 07:031 ilr 1.0 SWB260B 02126/11 07:031 ilr 1.0 SW8260B 02/26/11 07:03 1 ilr 1.0 SWB260B 02/26/11 07:03 1 ilr 1.0 SWB260B 02/26/11 07:031 ilr BO-120 SWB260B 02/26/11 07:031 i'r 70-130 SWB260B 02/26/11 07:03 1 ilr BO-120 SWB260B 02/26/11 07:03 1 ilr BO-120 SW8260B 02/26/11 07:03 1 ilr MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 14 of 44 EN:RGY i\ l .• ), • I ~ I ~ .1 .,. '. www.energylab.com AIIIIyfaI~SIra 1m Halena, MT 877-412-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-D515 Gillette, WY 888-188-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-&90-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Lab ID: 1 st Quarter Groundwater 2011 Cll020352-005 Client Sample ID: MW-27 Analyses MAJOR IONS Chloride Nitrogen, Nitrate+Nitrite as N Sulfate PHYSICAL PROPERTIES Solids, Total Dissolved TDS @ 180 C 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 46 6.0 455 1090 0.7 0.1 0.1 Units mglL mg/L mg/L mg/L pCi/L pCi/L pCi/L MDC -Minimum detectable concentration Report Date: 03/15/11 Collection Date: 02/09/11 12:00 DateRecelved: 02/11/11 Matrix: Aqueous MCU Qualifiers RL QCL Method Analysis Date 1 By D D A4500-CI B 0.5 E353.2 10 A4500-S04 E 10 A2540 C E900.1 E900.1 E900.1 MCL -Maximum contaminant level. NO -Not detected at the reporting limit. o -RL increased due to sample matrix. 02/15/11 15:51 fir 02l15/1113:13/dc 02/17/11 15:52/1r 02111111 14:31 Ilmc 03/02/11 18:26 1 ep 03/02111 18:26 1 ep 03/02/11 18:261 ep Page 10 of 31 EN:RGY ... "ll,,"d e l,1 ~ www.energyfab.com AMI1fkIII~Sbu rm Helana,lIT 877-472-0711 -Billin,s, MT BOO·735·4481 -Casper, WY 881·235-1515 Gillette, WY 888·116·7175 • Rapid City, SD 188·&72·1225 • Collage Station, IX 881-690·2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp 1 st Quarter Groundwater 2011 C11020544-007 Client Sample 10: MW-28 Analyses MAJOR IONS Chloride Report Definitions: Rl -Analyte reporting limit. QCL -Quality control limit. Result Units 114 mg/L Qualifiers RL Report Date: 03/24/11 Collection Date: 02/14/11 11 :20 DateReceived: 02/18/11 Matrix: Aqueous MCU QCL Method Analysis Date I By A4500-CI B 02128/11 10:5611r MCl -Maximum contaminant level. NO -Not detected at the reporting limit. Page 10 of 44 A ORGANIC ANALYTICAL REPORT 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 Client: Denison Mines Project: 1st Quarter Ground Water 2011 Lab Sample ID: 1102080-003A Client Sample ID: MW-30 Collection Date: 2/1/2011 1240h Received Date: 2/4/2011 Analytical Results Analyzed: 2/4/2011 1444h Units: I!g/L Dilution Factor: I Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 1015h Contact: Jo Ann Tischler Method: SW8260C VOAs by GC/MS Method 8260CI5030C CAS Reporting Analytical Number Limit Result Qual 109-99-9 1.00 < 1.00 17060-07-0 77-144 102 460-00-4 80-123 110 1868-53-7 80-124 101 2037-26-5 80-125 102 Report Date: 21712011 Page 6 0[21 All analyses applicable to the CWA, SDWA. and RCRA are porfonned in accordance to NELAC protocols. Pertinent sampling infonnation 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, orrcproduclion of this report in coonection with the advertisement, promotion or sale of any product or process, or in connection with tbe rc-publication of this report for any purpose other than for the addressee will be granted only on cootacL 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 J\, ,()!-J.d l,:/1 "_. www.energylab.com AM/fIIaI rwu.-SIIu 1m Helena, MT871-472-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 Gillette, WY 888-188-7175 . 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: 1 st Quarter Groundwater Lab 10: C11020163-003 Client Sample 10: 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 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 185 263 134 0.34 67.5 0.05 16 6.56 102 796 7.47 1530 NO NO NO NO NO NO 67 NO 38 NO NO NO 34.7 NO NO NO 5.97 NO NO 0.2 0.07 0.09 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 MOC -Minimum detectable concentration Report Date: 03/10/11 Collection Date: 02/01/11 12:40 DateReceived: 02/04/11 Matrix: Aqueous MCL! Qualifier Rl QCl Method Analysis Date I By 0 0 0 A2320 B 02/07/11 17:22 I jba A2320 B 02/07/11 17:22 I jba 0.50 E200.7 02/15/11 16:09 I cp A4500-CI B 02/15/11 15:1611r 0.10 A4500-F C 02/07/11 13:25 I jba 0.50 E200.7 02/15/11 16:09 I cp 0.05 A4500-NH3 G 02/11/11 12:00 I dc E353.2 02/04/11 16:59 I dc 0.50 E200.7 02/15/1116:09/cp 0.57 E200.7 02/15/11 16:09 I cp 20 A4500-S04 E 02/10/11 11 :54 I Ir 0.01 A4500-H B 02/04/11 15:49 I Ir 10 A2540 C 02/04/11 15:36 Ilmc 5.0 E200.8 02/08/11 07:11 I sml 0.50 E200.8 02/08/11 07:11 I sml 0.50 E200.8 02/08/11 07:11 I sml 25 E200.8 02/08/11 07:11 I sml 10 E200.8 02108/11 07:11 I sml 10 E200.8 02/08/11 07:11 I sml 30 E200.7 02/15/11 16:09 I cp 1.0 E200.8 02/08/11 07:11 I sml 10 E200.8 02/08/11 07:11 I sml 0.50 E200.8 02/08/11 07:11 I sml 10 E200.8 02/08/11 07: 11 I sml 20 E200.8 02108/11 07:11 I sml 5.0 E200.8 02/08/11 07:11 I sml 10 E200.8 02/08/11 07:11 I sml 0.50 E200.8 02/08/11 07:11 I sml 100 E200.8 02/08/11 07:11 I sml 0.30 E200.8 02/08/11 07:11 I sml 15 E200.8 02/08/11 07:11 I sml 10 E200.8 02/08/11 07:11 I sml E900.1 03/08/11 18:09 I ep E900.1 03/08/11 18:09 I ep E900.1 03/08/11 18 :09 I ep MCL -Maximum contaminant level. NO -Not detected at the reporting limit. o -RL increased due to sample matrix. Page 7 of 28 EN:RGY t,· ., ,I • j. I ( : ~,_ ~_ IIMW.8IIefgytab.com AM/rIit:II ~ SIta 'lSI Helena, MT 877-472-0111 • Hillinls, MT 800-735-4489 . Casper, WY 888-235-0515 Gillette, WY 8&&-188-7175 • Rapid City, so 888-172-1225 • College Statfon, TX 118-&90-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab ID: Denison Mines USA Corp 1 st Quarter Groundwater C11020163-003 Client Sample ID: MW-30 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 Chlorom ethane 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 -2.68 24.6 23.3 1550 0.990 ND ND ND ND ND ND ND ND ND ND 102 102 100 105 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 Qualifier 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: 03/10/11 Collection Date: 02/01/11 12:40 DateReceived: 02/04/11 Matrix: Aqueous MCU aCL Method Analysis Date 1 By Calculation 02/16/11 13 :23 1 kbh Calculation 02116/11 13 :23 1 kbh Calculation 02116/11 13 :23 1 kbh Calculation 02/16/11 13 :23 1 kbh Calculation 02/16/11 13 :23 1 kbh SW8260B 02/09/11 14:521 ilr SWB260B 02/09/11 14:521 ilr SW8260B 02/09/11 14 :52 1 ilr SWB260B 02/09111 14:52 1 ilr SW8260B 02/09/11 14:521 ilr SW8260B 02/09/11 14:52 1 ilr SW8260B 02/09/11 14:521 ilr SW8260B 02/09/11 14:521 ilr SW8260B 02/09/11 14:521 ilr SW8260B 02/09/11 14:52 1 ilr SW8260B 02/09/11 14:52 1 ilr SW8260B 02/09/11 14:52 1 ilr SW8260B 02109/11 14 :52 1 ilr SWB260B 02109/11 14:521 jlr MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 8 of 28 A ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 1st Quarter Ground Water 2011 1102080-004A AMERICAN Client Sample ID: MW-31 Collection Date: 2/1/2011 143Sh lOlSh 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 Received Date: 2/4/2011 Analytical Results Analyzed: 214/2011 IS03h Units: /lg/L Dilution Factor: 1 Compound Tetrah ydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromotluorobenzene SUIT: Dibromotluoromethane SUIT: Toluene-d8 Contact: 10 Ann Tischler Method: SW8260C VOAs by GC/MS Method 8260C/5030C CAS Reporting Analytical Number Limit Result Qual 109-99-9 1.00 < 1.00 17060-07-0 77-144 101 460-00-4 80-123 110 1868-53-7 80-124 101 2037-26-5 80-125 103 Report Date: 21712011 Page 7 of21 All analyses applicable to the CWA, SDWA. and RCRA are pl.-rfonned in accordance to NELAC protocols. Pertinent sampling infonnation is located 00 the attached COCo This report is provided for the exclusive use of the addressee. Privileges of subsequent llSC of the name oftbis 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 Ihan 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 faitb and according to the rules of the trade and ofscicnce EI\ERGY .'\1,)11,,1 )'.1 ". www.energyfab.com AM/ftk6I Exu/IINu SII!u IW Helena, MY 877-472-0711 • Billings, MY BOO-735-44B9 . CasPfII, WY '.8-235-0515 Gillette, WY 886-188-7175 • Rapid City, so '8B-&72-1225 • College Station, IX 888-&90-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater LablD: C11020163-004 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 ND 211 168 145 0.83 79.6 ND 21 5.75 91.6 538 7.66 1220 ND ND ND ND ND ND ND ND ND ND ND ND 64.6 ND ND ND 5.77 ND ND 0.4 0.08 0.09 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: 03/10/11 Collection Date: 02/01/11 14:35 DateReceived: 02/04/11 Matrix: Aqueous MCU Qualifier RL QCL Method Analysis Date 1 By D D D A2320 B 02/07/11 17:30 I jba A2320 B 02/07/11 17:30 I jba 0.50 E200.7 02/15/11 16: 13 I cp 1 A4500-CI B 02/15/11 15:1911r 0.10 A4500-F C 02/07/11 13 :28 I jba 0.50 E200.7 02/15/11 16:131 cp 0.05 A4500-NH3 G 02/11/11 12:021 dc E353.2 02/04/11 17:01 I dc 0.50 E200.7 02/15/11 16:131 cp 0.57 E200.7 02/15/11 16:131 cp 20 A4500-S04 E 02/10/11 11 :56 Ilr 0.01 A4500-H B 02/04/11 15:51 Ilr 10 A2540 C 02/04/11 15 :36 Ilmc 5.0 E200.8 02/08/11 07:17 I sml 0.50 E200.8 02/08/11 07:17 I sml 0.50 E200.8 02/08/11 07:17 I sml 25 E200.8 02/08/11 07:17 I sml 10 E200.8 02108/11 07:17 I sml 10 E200.8 02/08/11 07:17 I sml 30 E200.7 02/15/11 16:131 cp 1.0 E200.8 02/08/11 07:17 I sml 10 E200.8 02/08/11 07:17 I sml 0.50 E200.8 02/08/11 07:17 I sml 10 E200.8 02/08/11 07:17 I sml 20 E200.8 02/08/11 07:17 I sml 5.0 E200.8 02/08/11 07:17 I sml 10 E200.8 02108/11 07:17 I sml 0.50 E200.8 02/08/11 07:17 I sml 100 E200.8 02108111 07:17 I sml 0.30 E200.8 02/08/11 07:17 1 sml 15 E200.8 02/08/11 07:17 I sml 10 E200.8 02/08/11 07:17 I sml E900.1 03/08/11 18:091 ep E900.1 03/08/11 18:091 ep E900.1 03/08/11 18:091 ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 9 of 28 EN:RGY 1\ '-, ;1, .... 1 ~ l.( ~', www.energyl~b.com ~E'""-SkI '151 Helena, MT 877·472-0711 • Billings, MT 800·735·4489 • Casper, WV 888-235·0515 Glllatte, WV 888·186·7175 • Rapid City, SD 888·&72·1225 • Cellaga Station, TX 888-890·2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab ID: Denison Mines USA Corp 1 st Quarter Groundwater C11020163-004 Client Sample ID: MW-31 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-dB Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result -3.00 20.3 19.1 1240 0.980 NO ND ND ND ND ND ND ND ND ND 102 109 100 101 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 Qualifier 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: 03/10/11 Collection Date: 02/01/11 14:35 DateReceived: 02/04/11 Matrix: Aqueous MCU QCL Method Analysis Date 1 By Calculation 02/16/11 13 :23 1 kbh Calculation 02116/11 13 :23 1 kbh Calculation 02116/11 13 :23 1 kbh Calculation 02/16/11 13 :23 1 kbh Calculation 02/16/11 13 :23 1 kbh SW8260B 02/09/11 16 :40 1 jlr SW8260B 02/09/11 16:401 jlr SW8260B 02/09111 16 :40 / jlr SW8260B 02/09/11 16:401 jlr SW8260B 02/09111 16:40 1 jlr SW8260B 02/09/11 16:401 jlr SW8260B 02/09/11 16:40/ jlr SW8260B 02/09/11 16:401 jlr SW8260B 02/09/11 16 :40 / jl r SW8260B 02/09/11 16:401 jlr SW8260B 02/09/11 16:401 jlr SW8260B 02/09/11 16 :40 1 jl r SW8260B 02/09/11 16:40/ jlr SW8260B 02/09/11 16:401 jlr MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 10 of 28 EI\ERGY f\ A;'" It.j;'; •• www.energylab.com AM/tfIaI~ SIIu IIU Helena, MT 877-472-0711 • Billings, MT 800-135-4489 • Caspar, WY 888-235-0515 GiIIBlte, WY 88&-18&-1175 • Rapid City, SD 888-812-1225 • Collage Station, lX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: LablD: 1 st Quarter Groundwater 2011 C11020352-004 Client Sample ID: MW-32 Analyses 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 1.5 0.2 0.1 MOC -Minimum detectable concentration Units pCi/L pCi/L pCi/L Qualifiers RL Report Date: 03/15/11 Collection Date: 02/09/11 13:20 DateReceived: 02/11/11 Matrix: Aqueous MCU QCL Method Analysis Date 1 By E900.1 03/14/11 21 :331 ep E900.1 03/14/11 21 :331 ep E900.1 03/14/11 21 :33 1 ep MCl -Maximum contaminant level. NO -Not detected at the reporting limit. Page 9 of 31 A ORGANIC ANALYTICAL REPORT 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 Client: Denison Mines Project: Lab Sample ID: 1st Quarter Ground Water 2011 1102272-003A Client Sample ID: MW-34 Collection Date: 2116/2011 Received Date: 2/1812011 Analytical Results Analyzed: 211912011 1416h Units: Ilg/L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 0830h 0930h Contact: Jo Ann Tischler Method: SW8260C VOAs by GC/MS Method 8260C/5030C CAS Reporting Analytical Number Limit Result Qual 109-99-9 1.00 < 1.00 17060-07-0 77-144 110 460-00-4 80-123 104 1868-53-7 80-124 102 2037-26-5 80-125 99.2 Report Date: 2122/2011 Page 6 of 25 AIL analyses applicable to the CWA, SDWA. and ReRA are performed in accordance to NELAC protocols. Pertinent sampling information is located on the attacbed COCo This report is provided for the exclusive use of the addressee. Privileges or subsequent use of the nalne or this company or any member of its staff, orreproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connection with the re-publication oftbis 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 faitb and according to the rules of the trade and of science. EN:RGY /\'~()I~~"'l (ddl ':.. www.energylab.eom AMIytaI ExaIIMcI SIttu II!Z Helena, MT 877-472-0711 • Billings, MT 800·735·4489 . Casper, WY 888·235-0515 Gillette, WY 88&·188·7175 • Rapid City, SD 888·872·1225 • College Station, IX 888-&10·221 B LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 LablD: C11 020544-01 0 Client Sample 10: MW-34 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 An & U MOC Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result NO 335 505 74 0.54 150 NO 0.3 13.3 394 2110 7.42 3690 NO ND ND ND ND NO NO NO 34 ND ND NO 136 ND ND ND 23.7 NO ND 0.5 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 pCi/L MOC -Minimum detectable concentration Report Date: 03/24/11 Collection Date: 02/16/11 08:30 DateRecelved: 02/18/11 Matrix: Aqueous MCL! Qualifiers Rl QCl Method Analysis Date 1 By D D D D A2320 B 02118111 19 :58 1 jba A2320 B 02/18/11 19:581 jba E200.7 02/25/11 13 :36 1 cp A4500-CI B 02128/11 11 :03 Ilr 0.10 A4500-F C 02/18/11 16:041 jba 0.5 E200.7 02/25/11 13:36 1 cp 0.05 A4500-NH3 G 02125/11 12:241 dc 0.1 E353.2 02/23/1112:52/dc 0.5 E200.7 02125/11 13 :36 1 cp E200.7 02/25/11 13 :36 1 cp 50 A4500-S04 E 03/03/11 12:04/1r 0.01 A4500-H B 02/18/11 15:49 1 Ir 11 A2540 C 02/18/11 16:01 1 Imc 5.0 E200.8 02123/11 04:491 sml 0.50 E200.8 02123/11 04:49 1 sml 0.50 E200.8 02/23/11 04:491 sml 25 E200.8 02/23/11 04:491 sml 10 E200.8 02/23/11 04:491 sml 10 E200.8 02/23/11 04:491 sml 30 E200.7 02125/11 13:361 cp 1.0 E200.8 02123/11 04:491 sml 10 E200.8 02/23/11 04:491 sml 0.50 E200.8 02/23/11 04:491 sml 10 E200.8 02123/11 04:49 1 sml 20 E200.8 02/23/11 04:491 sml 5.0 E200.8 02123/11 04:491 sml 10 E200.8 02/23/11 04:49 1 sml 0.50 E200.8 02/23/11 04:491 sml 100 E200.8 02/23/11 04:491 sml 0.30 E200.8 02/23/11 04:491 sml 15 E200.8 02/23/11 04:491 sml 10 E200.8 02/23/11 04:49 1 sml E900.1 03/02/11 18:26 1 ep E900.1 03/02/11 18:261 ep E900.1 03/02111 18:261 ep MCL -Maximum contaminant level. NO -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 15 of 44 EN:RGY ,', r ~ ... "")' ., ~, l..!/ ~ I r '. www.energylab.com AM/tfIrII~SIIIu 1m Helena, MT 877-472-0711 • Billings, MT 800-135-4489 • Casper, WY 888-235-0515 GiII&tte, WY 888-&86-7175 • Rapid City, SD 888-&12-1225 • College Station, IX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Lab 10: 1 st Quarter Groundwater 2011 C11 020544-01 0 Client Sample 10: MW-34 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 3.22 51.6 55.0 3440 1.07 ND ND ND ND ND ND ND ND ND ND 109 114 108 84.0 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: 03/24/11 Collection Date: 02/16/11 08:30 DateReceived: 02/18/11 Matrix: Aqueous MCU QCl Method Analysis Date 1 By Calculation 03/14/11 08:241 kbh Calculation 03/14/11 08:241 kbh Calculation 03114/11 08 :24 1 kbh Calculation 03/14/11 08:241 kbh Calculation 03/14/11 08:241 kbh SW8260B 02/26/11 01 :06 1 jlr SW8260B 02/26/11 01 :06 1 jlr SW8260B 02/26/11 01 :06 1 jlr SW8260B 02126/11 01 :06 1 jlr SW8260B 02126/11 01 :06 1 jlr SW8260B 02126/11 01 :06 1 jlr SW8260B 02126/11 01 :06 1 jlr SW8260B 02/26/11 01 :06 1 jlr SW8260B 02/26/11 01 :06 1 jlr SW8260B 02/26/11 01 :06 1 jlr SW8260B 02/26/11 01 :06 1 jlr SW8260B 02/26/11 01 :06 1 jlr SW8260B 02/26/11 01 :06 1 jlr SW8260B 02/26/11 01 :06 1 jlr MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 16 of 44 A ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 1st Quarter Ground Water 2011 11D2272-004A AMERICAN Client Sample ID: MW-35 Collection Date: 2115/2011 1240h 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 Received Date: 2118/2011 0930h Analytical Results Analyzed: 2119/2011 1513h 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 Method: SW8260C VOAs by GC/MS Method 8260C/5030C CAS Reporting Analytical Number Limit Result Qual 109-99-9 1.00 < 1.00 17060-07-0 77-144 109 460-00-4 80-123 104 1868-53-7 80-124 102 2037-26-5 80-125 98.9 Report Date: 2/22/2011 Page 7 of25 All 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 llse oftbe name of this company or any member of its staff, 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 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 ofscience~ EN:RGY .'\!: ) r ~ , ,I t ',I " www.energylab.com AIIIIyIiuf f.sufIMM:I sm, lIS! Helena, MT 877-472-0711 • Billings, MT 800·735-4489 . Casper, WY 888·235·0515 Gillette, WY 8&&·188·7175 • Rapid City, SO 888·612·1225 • CDilege StatiDn, 1X 888·690·2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Lab ID: C11020544-011 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 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 266 289 41 0.32 86.6 0.06 0.3 7.7 227 1140 7.19 2200 ND ND ND ND ND ND 188 ND 248 ND ND ND ND ND ND ND 12.7 ND ND 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 pCi/L MDC -Minimum detectable concentration Report Date: 03/24/11 Collection Date: 02/15/11 12:40 DateReceived: 02/18/11 Matrix: Aqueous MCL! Qualifiers RL QCL Method Analysis Date 1 By D D· A2320 B 02/18/11 20:061 jba A2320 B 02/18/11 20:061 jba 0.5 E200.7 02/25/11 13 :40 1 cp 1 A4500-CI B 02/28/11 11 :06 1 Ir 0.10 A4500-F C 02/18/11 16:101 jba 0.5 E200.7 02/25/11 13:40 1 cp 0.05 A4500-NH3 G 02/25/11 12:261 dc 0.1 E353.2 02/23/11 12:541 dc 0.5 E200.7 02/25/11 13:40 1 cp 0.6 E200.7 02/25/11 13:40 1 cp 50 A4500-S04 E 03/03/11 12:05 1 Ir 0.01 A4500-H B 02/22/11 09:39 1 Ir 10 A2540 C 02/18/11 16:011 Imc 5.0 E200.8 02/23/11 04:561 sml 0.50 E200.8 02/23/11 04:561 sml 0.50 E200.8 02/23/11 04:56 1 sml 25 E200.8 02/23/11 04:561 sml 10 E200.8 02/23/11 04:56 1 sml 10 E200.8 02123/11 04:561 sml 30 E200.7 02/25/11 13 :40 1 cp 1.0 E200.8 02/23/11 04:561 sml 10 E200.8 02/23/11 04:56 1 sml 0.50 E200.8 02/23/11 04:56 1 sml 10 E200.8 02/23/11 04:56 1 sml 20 E200.8 02/23/11 04:561 sml 5.0 E200.8 02/23/11 04:561 sml 10 E200.8 02/23/11 04:561 sml 0.50 E200.8 02/23/11 04:561 sml 100 E200.8 02/23/11 04:561 sml 0.30 E200.8 02/23/11 04:561 sml 15 E200.8 02/23/11 04:561 sml 10 E200.8 02/23/11 04:561 sml E900.1 03/02/11 18:26 1 ep E900.1 03/02/11 18 :26 1 ep E900.1 03/02/11 18 :26 1 ep MCl -Maximum contaminant level. ND -Not detected at the reporting limit. D -Rl increased due to sample matrix. Page 17 of 44 EI\ERGY ,\ •. H,,\.(lr., '. Helena, MT 877-472-0711 • Billings, MT BOO-735-4489 • Casper, WY 881-235-D515 Gillalta, WY 888-18&-7175 • Rapid City, SD 888-&72-1225 • College Station, TX 881-&90-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Lab ID: 1 st Quarter Groundwater 2011 C11020544-011 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-dB Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result 3.74 29.3 31.6 1940 1.13 NO ND NO ND NO ND ND ND NO ND 107 112 106 B4.0 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 BO-120 Report Date: 03/24/11 Collection Date: 02/15/11 12:40 DateReceived: 02/18/11 Matrix: Aqueous MCL! QCL Method Analysis Date / By Calculation 03/14/11 08 :25 1 kbh Calculation 03114/11 08:25/ kbh Calculation 03114/11 08:251 kbh Calculation 03/14/11 08:251 kbh Calculation 03/14/11 08:251 kbh SW8260B 02/26/11 01 :421 ilr SW8260B 02/26/11 01 :42 / ilr SW8260B 02126/11 01 :421 ilr SW8260B 02/26/11 01 :42 / ilr SW8260B 02/26/11 01 :42 1 ilr SW8260B 02/26/11 01 :42 1 ilr SW8260B 02/26/11 01 :421 ilr SW8260B 02/26/11 01 :42 1 ilr SW8260B 02/26/11 01 :42 1 ilr SW8260B 02/26/11 01 :42 1 ilr SW8260B 02/26/11 01 :42 1 ilr SW8260B 02126/11 01 :42 1 ilr SW8260B 02/26/11 01 :421 ilr SW8260B 02/26/11 01 :421 ilr MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 18 of 44 A ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 1st Quarter Ground Water 2011 1102272-006A AMERICAN Client Sample ID: MW-35R Collection Date: 2114/2011 0820h 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 Received Date: 2/1812011 0930h Analytical Results Analyzed: 2119/2011 1551h Units: Ilg/L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 - Contact: 10 Ann Tischler Method: SW8260C VOAs by GC/MS Method 8260C/5030C CAS Reporting Analytical Number Limit Result Qual 109-99-9 1.00 < 1.00 17060-07-0 77-144 110 460-00-4 80-123 103 1868-53-7 80-124 102 2037-26-5 80-125 99.3 Report Date: 2/22/2011 Page 9 of 25 All analyses applicable to the CWA, SDWA. and ReRA are perfonned in accordance to NELAC protocols. Pertinent sampling infonnation is located on tbe attached cac. 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 reprodut:tion 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 ooly 00 contact. This company accepts no responsibility except for tbe due pcrfonnan!;e of inspection and/or analysis in good faith and according to the rules of the trade and of science. EI\ERGY i\" l!-,."! ( I';!" " www.energylab.com WIytIaI ExuIIMIt:I SIrA 1m Helena, tIT 877-412-0711 • Billings, tIT 800-735-4489 . Casper, WY 888-235-0515 GIIIBttB, WY 886-688-7175 • Rapid City, SD 188-&12-1225 • College Station, TX 888-890-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 sl Quarter Groundwater 2011 Lab ID: C 11020544-014 Client Sample ID: MW-35R 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 NO 4 NO NO NO NO NO 0.1 NO NO 9.14 NO NO NO NO NO NO NO 55 NO NO NO NO NO ND NO NO ND NO NO NO 0.09 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 pCi/L pCi/L pCi/L MDC -Minimum detectable concentration H -Analysis performed past recommended holding time. Report Date: 03/24/11 Collection Date: 02/14/11 08:20 DateRecelved: 02/18/11 Matrix: Aqueous MCL! Qualifiers Rl QCl Method Analysis Date 1 By 0 H U A2320 B 02118/11 20:221 jba A2320 B 02/18111 20:221 jba 0.5 E200.7 02125/11 13:49 1 cp A4500-CI B 02/28/11 11 :1511r 0.10 A4500-F C 02/18/11 16 :25 1 jba 0.5 E200.7 02/25/11 13 :491 cp 0.05 A4500-NH3 G 02/25/11 12:301 de 0.1 E353.2 02123/11 12:59 1 de 0.5 E200.7 02/25/11 13:491 cp 0.6 E200.7 02/25/11 13:49 1 cp A4500-S04 E 03/03/11 12:46 1 Ir 0.01 A4500-H B 02/22/11 09:50/1r 10 A2540 C 02/18/1116:02 lime 5.0 E200.8 02123/11 05:431 sml 0.50 E200.8 02/23/11 05:43 1 sml 0.50 E200.8 02/23/11 05:43 1 sml 25 E200.8 02/23/11 05:43 1 sml 10 E200.8 02/23/11 05:43 1 sml 10 E200.8 02/23/11 05:43 1 sml 30 E200.7 02/25/11 13:49/ cp 1.0 E200.8 02/23/11 05:431 sml 10 E200.8 02/23/11 05:431 sml 0.50 E200.8 02/23/11 05:431 sml 10 E200.8 02123/11 05:431 sml 20 E200.8 02123/11 05:431 sml 5.0 E200.8 02123/11 05:43 1 sml 10 E200.8 02/23/11 05:43 1 sml 0.50 E200.8 02123/11 05:43 / sml 100 E200.8 02123/11 05:43 1 sml 0.30 E200.8 02/23/11 05:43 1 sml 15 E200.8 02123/11 05:431 sml 10 E200.8 02/23/11 05:431 sml E900.1 03/02/11 18:261 ep E900.1 03/02/11 18:261 ep E900.1 03/02/11 18:261 ep MCL -Maximum contaminant level. NO -Not detected at the reporting limit. D -RL increased due to sample matrix. U -Not detected at minimum detectable concentration Page 22 of 44 EN:RGY /01 JH~\.I '--'HI'·J www.energylab.com AaI1fItM £luIIMa SIJu lISt Helena, liT 877-472-0711 • Billings, MT 8OD-135-4489 • Casper, WY 888-235-0515 Gillette, WY 818-186-7175 • Rapid City, SD 888-&72-1225 • Collage Station, IX 888-&90-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp 1 st Quarter Groundwater 2011 Cll020544-014 Client Sample 10: MW-35R Analyses Result DATA QUALITY AlC Balance (± 5) -100 Anions 0.102 Cations ND Units Qualifiers Rl % meq/L meq/L Report Date: 03/24/11 Collection Date: 02/14/11 08:20 DateRecelved: 02/18/11 Matrix: Aqueous MCU QCl Method Analysis Date 1 By Calculation 03/14/11 OB :27 1 kbh Calculation 03114/11 OB:27 1 kbh Calculation 03114/11 OB:27 1 kbh -The ion balance is not appropriate for samples having a conductivity less than 300 umhos/cm. 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. ND NO NO NO NO NO ND NO ND ND 107 108 107 B4.0 ug/L 20 SWB260B 02/26/11 02:53 1 jlr ug/L 1.0 SWB260B 02126/11 02:53 1 jlr ug/L 1.0 SWB260B 02126/11 02 :53 1 jlr ug/L 1.0 SWB260B 02126/11 02:531 jlr ug/L 1.0 SWB260B 02126/11 02:531 jlr ug/L 20 SWB260B 02126/11 02:531 jlr ug/L 1.0 SW8260B 02/26/11 02 :53 1 jlr ug/L 1.0 SW8260B 02/26/11 02:531 jlr ug/L 1.0 SW8260B 02/26/11 02:531 jlr ug/L 1.0 SW8260B 02/26/11 02:531 jlr %REC 80-120 SW8260B 02/26/11 02:531 jlr %REC 70-130 SW8260B 02/26/11 02:531 jlr %REC BO-120 SW8260B 02/26/11 02:531 jlr %REC 80-120 SW8260B 02/26/11 02:531 jlr MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 23 of 44 A ORGANIC ANALYTICAL REPORT 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: awaI@awaI-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Client: Denison Mines Project: Lab Sample ID: 1st Quarter Ground Water 2011 I1D2272-005A Client Sample ID: MW-60 Collection Date: 2/16/2011 Received Date: 2118/2011 Analytical Results Analyzed: 2/1912011 1532h Units: IlglL Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 l300h 0930h Contact: Jo Ann Tischler Method: SW8260C VOAs by GC/MS Method 8260CIS030C CAS Reporting Analytical Number Limit Result Qual 109-99-9 1.00 < 1.00 17060-07-0 77-144 110 460-00-4 80-123 105 1868-53-7 80-124 102 2037-26-5 80-125 99.0 Report Date: 2/22/2011 Page 8 of25 All analyses applicable to the CWA, SDWA. and ReM are performed in accordance to NELAC protQ[::ols~ Pertinent sampling information is tocated on the attached CDC. This report is provided for the exclusive use of tbe addressee. Privileges ofsubsequcnt use of the name of tbis 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, Of in connection with the fe-publication of this report for any purpose othcr tha.n for the addressee will be granted only on contact. This company accepts no rcsponsibility 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 ;., ,}j, ~-.I r. it" • www.enefgylab.com AM/ffk:II~ SIller 1m Helena, MT877-47Z-0711 • Billings, MT 8011-735-4489 . Casper, WY 888-235-0515 Gillalte, WY 8&&-186-7175 . Rapid CI1y, SO 888-&72-1225 • College Station, TX 888-&80-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Lab ID: C11020544-013 Client Sample ID: MW-60 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 5 ND 55 ND ND ND ND ND ND 4.98 67 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 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 pCi/L pCi/L pCi/L MDC -Minimum detectable concentration U -Not detected at minimum detectable concentration Report Date: 03/24/11 Collection Date: 02/16/11 13:00 DateReceived: 02/18/11 Matrix: Aqueous MCU Qualifiers Rl QCl Method Analysis Date 1 By D U A2320 B 02/18/11 20:121 jba A2320 B 02/18/11 20:121 jba 0.5 E200.7 02/25/11 13:441 cp 1 A4500-CIB 02/28/11 11 :08 Ilr 0.10 A4500-F C 02/18/11 16:21 1 jba 0.5 E200.7 02/25/11 13 :441 cp 0.05 A4500-NH3 G 02/25/11 12 :28 1 dc 0.1 E353.2 02/23/11 12:571 dc 0.5 E200.7 02/25/11 13 :441 cp 0.6 E200.7 02/25/11 13:441 cp A4500-S04 E 03/03/11 12:11 IIr 0.01 A4500-H B 02/22/11 09 :48 Ilr 10 A2540 C 02/18/11 16:0211mc 5.0 E200.8 02/23/11 05:091 sml 0.50 E200.8 02/23/11 05:091 sml 0.50 E200.8 02/23/11 05:091 sml 25 E200.8 02/23/11 05:091 sml 10 E200.8 02/23/11 05:091 sml 10 E200.8 02/23/11 05:091 sml 30 E200.7 02/25/11 13 :44 1 cp 1.0 E200.8 02/23/11 05:091 sml 10 E200.8 02/23/11 05:09 1 sml 0.50 E200.8 02/23/11 05:09 1 sml 10 E200.8 02/23/11 05:091 sml 20 E200.8 02/23/11 05:09 1 sml 5.0 E200.8 02/23/11 05:09 1 sml 10 E200.8 02/23/11 05:09 1 sml 0.50 E200.8 02123/11 05:091 sml 100 E200.8 02123/11 05:091 sml 0.30 E200.8 02123/11 05:09 1 sml 15 E200.8 02/23/11 05:09 1 sml 10 E200.8 02123/11 05:091 sml E900.1 03/02/11 18:26 1 ep E900.1 03/02/11 18 :26 1 ep E900.1 03/02/11 18 :26 1 ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 20 of 44 EN:RGY ;,'_O,u\l(,I([ " www.energytab.com AIIIII!kM rruo-. SJB. 1m Helena, MT 877-472~711 • Billings, MT 800·735·4489 • Casper, WY 888·235·0515 Gillette, WY 881·188·7175 • Rapid City, SD 888·&72·1225 • College Station, 1]( 888-690·2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Client Sample 10: Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Denison Mines USA Corp 1 st Quarter Groundwater 2011 C11020544-013 MW-60 Result -100 1.67 NO Units Qualifiers RL % meq/L meq/L Report Date: 03/24/11 Collection Date: 02/16/11 13:00 DateReceived: 02/18/11 Matrix: Aqueous MCU QCL Method Analysis Date 1 By Calculation 03/14/11 08 :26 1 kbh Calculation 03/14/11 08:261 kbh Calculation 03114/11 08 :26 1 kbh -The ion balance is not appropriate for samples having a conductivity less than 300 umhos/cm. 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 NO NO NO NO NO NO NO NO NO 110 115 107 84.0 ug/L 20 SW8260B 02/26/11 02:171 jlr ug/L 1.0 SW8260B 02/26/11 02: 17 1 jlr ug/L 1.0 SW8260B 02/26/11 02:171 jlr ug/L 1.0 SW8260B 02/26/11 02:171 jlr ug/L 1.0 SW8260B 02/26/11 02:171 jlr ug/L 20 SW8260B 02/26/11 02:171 jlr ug/L 1.0 SW8260B 02/26/11 02:171 jlr ug/L 1.0 SW8260B 02/26/11 02:171 jlr ug/L 1.0 SW8260B 02/26/1102:171 jlr ug/L 1.0 SW8260B 02/26/11 02:171 jlr %REC 80-120 SW8260B 02/26/11 02:171 jlr %REC 70-130 SW8260B 02/26/11 02:171 jlr %REC 80-120 SW8260B 02/26/11 02:171 jlr %REC 80-120 SW8260B 02/26/11 02:17 I jlr MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 21 of 44 A ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 1st Quarter Ground Water 2011 1102168-003A AMERICAN Client Sample ID: MW-65 Collection Date: 2/8/2011 1215h 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 Received Date: 2/11/2011 0945h Analytical Results Analyzed: 2/1112011 1215h Units: IlglL Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 Contact: Jo Ann Tischler Method: SW8260C VOAs by GC/MS Method 8260CIS030C CAS Reporting Analytical Number Limit Result Qual 109-99-9 1.00 < 1.00 17060-07-0 77-144 101 460-00-4 80-123 108 1868-53-7 80-124 99.8 2037-26-5 80-125 102 Report Date: 2/17/2011 Page 6 of21 All analyses applicable to the CWA. SDWA, and ReRA arc pcrfonned in accordance to NELAC protocols. Pertinent sampling infonnatioD is Located on the attached COCo This report is provided for the exclusive use oflhe addressee Privileges of subsequent use of the name of this company or any member of its staff, or reproduction of tbis 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 thall for the addressee will be granted only on contact. Tbis company accepts no responsibility except for the due pcrfonnance of inspection andlor analysis in good faith and according to the rules of the trade and ofscience~ EN:RGY ;\' J'<"I' ,( •• ' www.energylab.com AMIytJaI~ SIlIu 1m Helena, liT 877-412-0711 • Billings, MT 800·735·4488 . Casper, WY 888-235-0515 Gillette, WY 888·188·7175 • Rapid City, SD 888-872-1225 • College Station, IX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Lab 10: C11020352-003 Client Sample 10: MW-65 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 -DISSOL VEO 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 567 430 59 3.15 847 0.11 2.4 20.9 255 4870 6.65 6630 ND 2.16 83.2 ND 267 ND ND ND 28100 0.75 708 128 13.6 ND 1.01 ND 41.7 ND 500 9.1 1.1 0.6 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 pCi/L MDC -Minimum detectable concentration Report Date: 03/15/11 Collection Date: 02/08/11 12:15 DateReceived: 02/11/11 Matrix: Aqueous MCL! Qualifiers RL QCl Method Analysis Date I By D D D D D A2320 B 02115111 16:371 jba A2320 B 02115/11 16:37 1 jba E200.7 02/25/11 13:08 1 cp 1 A4500-CI B 02/15/11 15:50 1 Ir 0.10 A4500-F C 02/11/11 14:22 I jba 0.5 E200.7 02/25/11 13:08 I cp 0.05 A4500-NH3 G 02/14/11 12:381 dc 0.2 E353.2 02/15/11 13:101 dc 0.5 E200.7 02/25/11 13:08 1 cp E200.7 02/25/11 13:08 1 cp 100 A4500-S04 E 02117/11 15:47/1r 0.01 A4500-H B 02/11 III 14:46 IImc 17 A2540 C 02/11/11 14:311 Imc 5.0 E200.B 02117/11 00:121 sml 0.50 E200.8 02115/11 20:251 sml 0.50 E200.8 02/15/11 20:251 sml 25 E200.8 02/15/11 20:25 I sml 10 E200.8 02/17/11 00:121 sml 10 E200.8 02/15/11 20:251 sml 30 E200.7 02/16/11 1B:26 1 cp 1.0 E200.8 02/17/11 00 :121 sml 10 E200.8 02/17/11 00:12 I sml 0.50 E200.8 02/17/11 00:12 I sml 10 E200.8 02115/11 20:25 I sml 20 E200.B 02117/11 00:12 I sml 5.0 E200.B 02l17/1100:12/sml 10 E200.8 02/17/11 00:121 sml 0.50 E200.8 02/15/11 20 :251 sml 100 E200.8 02/17/11 00 :121 sml 0.30 E200.8 02/17/11 00:121 sml 15 E200.8 02/17/11 00:121 sml 10 E200.8 02/17/11 00:121 sml E900.1 02/17/11 18:041 ep E900.1 02117/11 1 B:04 1 ep E900.1 02/17/11 18:041 ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 7 of 31 EN:RGY .,1,.>/ •• "1',,11\ • www.energylab.com AIu/rlJuI bu~ SIirc. IIJ2 Helena, MT 877-472-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-8515 Gillette, WY 888-188-7175 • Rapid City, SD 888-672-1225 • Collage station, 1X 818-610-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Lab ID: 1 st Quarter Groundwater 2011 C11020352-003 Client Sample ID: MW-65 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 -4.59 113 103 6780 0.980 ND ND ND ND ND ND ND ND ND ND 103 107 96.0 104 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: 03/15/11 Collection Date: 02/08/11 12:15 DateRecelved: 02/11/11 Matrix: Aqueous MCL! QCL Method Analysis Date I By Calculation 03/10/11 13:031 kbh Calculation 03/10/11 13 :03 I kbh Calculation 03110/11 13:031 kbh Catculation 03/10/11 13:031 kbh Calculation 03/10/11 13:031 kbh SW8260B 02/12/11 03:331 jlr SW8260B 02/12/11 03:331 jlr SW8260B 02/12/11 03 :33 I jlr SW8260B 02/12111 03:33 I jlr SW8260B 02/12111 03:331 jlr SW8260B 02/12111 03 :33 I jlr SW8260B 02/12/11 03:331 jlr SW8260B 02/12/11 03 :331 jlr SW8260B 02/12/11 03:331 jlr SW8260B 02/12/11 03 :331 jlr SW8260B 02/12/11 03:331 jlr SW8260B 02/12/11 03:331 jlr SW8260B 02/12/11 03:331 jlr SW8260B 02/12/11 03 :33 1 jlr MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 8 of 31 EN:RGY ~', I ::)1,;, I C.I (I r '> www.energylab.com AM/JfJuJEtullloct st." 1m Helena, MT 877-472-G711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 Gillette, WY 8&5-&88-7175 • Rapid City, SD 888-&72-1225 • College Station, IX 888-&80-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: LablD: Denison Mines USA Corp 1 st Quarter Groundwater 2011 C11020544-012 Client Sample ID: MW-70 Analyses MAJOR IONS Sulfate PHYSICAL PROPERTIES Solids, Total Dissolved TDS @ 180 C METALS -DISSOLVED Thallium Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. Result 1610 3180 3.54 D -Rl increased due to sample matrix. Units mg/l mg/l ug/l Report Date: 03/24/11 Collection Date: 02/15/11 14:40 DateReceived: 02/18/11 Matrix: Aqueous MCU Qualifiers Rl QCl Method Analysis Date 1 By D 50 A4500-S04 E 03/03/11 12:071 Ir 10 A2540 C 02/18/11 16:01 Ilmc 0.50 E200.8 02/23/11 05:021 sml MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 19 of 44 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 1st Quarter Ground Water 2011 1102080-005A Client Sample ID: Trip Blank Collection Date: 2/1/2011 Received Date: 2/412011 1015h Analytical Results Analyzed: 214/2011 1522h Units: ~g/L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 Contact: Jo Ann Tischler Method: SW8260C VOAs by GCIMS Method 8260C/5030C CAS Reporting Analytical Number Limit Result Qual 109-99-9 1.00 < 1.00 17060-07-0 77-144 102 460-00-4 80-123 107 1868-53-7 80-124 101 2037-26-5 80-125 102 Report Date: 21712011 Page 8 of21 All analyses applicable to the CWA, SDWA. and RCRA are performed in accordance to NELAC protocols Pertinent sampling infonnaLion is located on the attached cac. This report is provided for the exclusive use oftbe addressee Privileges ofsubscqUCDt 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 ofaDY 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 ofinspcction andlor analysis in good faith aDd according to the roles of the trade and of science. A ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 1st Quarter Ground Water 2011 110216S-004A AMERICAN Client Sample ID: Trip Blank Collection Date: 2/7/2011 WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT S4115 (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 Received Date: 2/1112011 0945h Analytical Results Analyzed: 2/1112011 1234h Units: IlglL Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-dS Contact: Jo Ann Tischler Method: SW8260C VOAs by GC/MS Method 8260CIS030C CAS Reporting Analytical Number Limit Result Qual 109-99-9 1.00 < 1.00 17060-07-0 77-144 102 460-00-4 80-123 109 IS6S-53-7 SO-124 101 2037-26-5 SO-125 103 Report Date: 2117/2011 Page 7 of21 All analyses applicable to the CWA, SDWA, and RCRA arc per fanned in accordance to NELAC protocols. Pertinent sampling infonnation is located on the attached cae This report is provided for the ex.clusivc use oflhc addressee Privileges of subsequent usc ofthc name of this company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or salc of any product or process, or in connection with tbe 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 pcrfonnance of inspection andlor analysis in good Faith and according to the rules of the trade and of science. A ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines 1st Quarter Ground Water 2011 1102272-007A AMERICAN Client Sample ID: Trip Blank Collection Date: 2/14/2011 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 Received Date: 2/1S/2011 0930h Analytical Results Analyzed: 2119/2011 1610h Units: ).lgIL Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-dS Contact: Jo Ann Tischler Metbod: SWS260C VOAs by GC/MS Method 8260C/5030C CAS Reporting Analytical Number Limit Result Qual 109-99-9 1.00 < 1.00 17060-07-0 77-144 111 460-00-4 SO-123 104 IS6S-53-7 SO-124 101 2037-26-5 SO-125 97.9 Report Date: 2/22/20 II Page \0 of 25 All analyses applicable to the CWA, SDWA, aod ReRA arc pcrfonned 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 ofsubsequeot use of the name of this company or any member of its stafT, or reproduction oftbis report in connection witb the advertisement, promotion or sale of any product or process, or in connection with the re-publication oftbis 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 ofiospection and/or analysis in good faith aDd according to the rules of the trade aDd of science. EN:RGY j. I J' (~\ I \.)1 ~ I '. www.energylab.com AM/tIfaI EJUIInI:t SIIIu /152 Helena, MT 877-472-0711 • Billings, MT 800· 735·4489 • Casper, WY 888·235·0515 Gillette, WY 888·188·7175 • Rapid City, SD 888·812-1225 • Colluge Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: LablD: Denison Mines USA Corp 1 st Quarter Groundwater C11020163-005 Client Sample ID: Trip Blank 5521 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 100 107 99.0 102 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 Qualifier 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: 03/10/11 Collection Date: 02/02/11 DateReceived: 02/04/11 Matrix: Aqueous MCL! QCL Method Analysis Date 1 By SW8260B 02/09/11 15:281 jlr SW8260B 02/09/11 15 :28 1 jl r SW8260B 02/09/11 15:281 jlr SW8260B 02/09/11 15:281 jlr SW8260B 02/09/11 15:281 jlr SW8260B 02109/11 15:281 jlr SW8260B 02109/11 15:28/ jlr SW8260B 02/09/11 15 :28 / jlr SW8260B 02/09/11 15:281 jlr SW8260B 02/09/11 15:281 jlr SW8260B 02/09/11 15:281 jlr SW8260B 02109/11 15 :28 / jlr SW8260B 02/09/11 15 :28 1 jlr SW8260B 02/09111 15 :28 1 jlr MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 11 of 28 EN:RGY ..... 11)1.,,1 Ill!' www.energy\ab.com AtIM!IIaI ~ SIIIa 1m Halena, r.rr 877-472-0711 • Billings, MT BOO-735-4488 • Casper, WY 888-235-0515 Gillette, WY B8S-888-7175 • Rapid City, SD 888-&72-1225 • Collage Station, IX 888-680-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Lab 10: 1 st Quarter Groundwater 2011 C11020352-007 Client Sample 10: Trip Blank 5515 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 107 108 104 104 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 80-120 Report Date: 03/15/11 Collection Date: 02/07/11 DateRecelved: 02/11/11 Matrix: Aqueous MCL! QCL Method Analysis Date 1 By SW8260B 02111/11 22:431 jlr SW8260B 02/11/11 22:43 1 jlr SW8260B 02/11/11 22:431 jlr SW8260B 02/11/11 22:431 jlr SW8260B 02/11/11 22:431 jlr SW8260B 02/11/11 22:43 1 jlr SW8260B 02/11/11 22:431 jlr SW8260B 02/11/11 22:43 1 jlr SW8260B 02/11 III 22:43 I jlr SW8260B 02/11/11 22:43 I jlr SW8260B 02/11/11 22:43 I jlr SW8260B 02111/11 22:43 I jlr SW8260B 02111 III 22:43 I jlr SW8260B 02111/11 22:43 I jlr MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 12 of 31 EN:RGY I, ~ J II" ,\, I ~ I-• www.energylab.com AMI1fIuI buJlMJc. S/itc. IW Helena, MT 877-472-0711 • Billings, MT 800-135-4489 • Casper, WY 888-235-0515 Gillette, WY 888-18&-7175 • Rapid City, SO 888-&72-1225 • College Station, IX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Lab 10: 1 st Quarter Groundwater 2011 C11020544-015 Client Sample 10: Trip Blank 6092 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: Dibromofluoromethane 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 113 105 112 B4.0 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 BO-120 70-130 BO-120 BO-120 Report Date: 03/24/11 Collection Date: 02/16/11 DateReceived: 02/18/11 Matrix: Aqueous MCU QCL Method Analysis Date 1 By SWB260B 02/26/11 03:291 jlr SWB260B 02/26/11 03:29 1 jlr SWB260B 02/26/11 03:291 jlr SWB260B 02/26/11 03 :29 1 jlr SWB260B 02/26/11 03:291 jlr SWB260B 02126/11 03:29 1 jir SW8260B 02126/11 03:291 jlr SWB260B 02126/11 03 :291 jlr SWB260B 02/26/11 03:29 1 jlr SWB260B 02/26/11 03:291 jlr SWB260B 02/26/11 03:291 jlr SWB260B 02/26/11 03 :29 1 jlr SW8260B 02/26/11 03 :291 jlr SWB260B 02/26/11 03 :291 jlr MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 24 of 44 EN:RGY ..... '-.\)Iud l 10"1. '..J www.energylab.com AM/ytJc6I~smu 1m Helena, lIfT 877-472-0711 _ Bllllnll, Iff 1110·730·4481 • Caapar, WY 818·236-151& Gillette, W'( 866·188-7175 • RapId City, SD 888·172-1225 • CIIUe,. Stalton, IX 11H, .. ,218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab ID: Denison Mines USA Corp 1 st Quarter Groundwater C 11020163-006 Client Sample ID: Temp Blank Analyses Result Units PHYSICAL PROPERTIES Temperature Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. 2.0 QualHler RL Report Date: 03/10/11 Collection Date: 02/02/11 DateRecelved: 02/04/11 Matrix: Aqueous MCU QCL Method Analysis Date I By E170.1 02104/11 10:00 1 kbh MCl -Maximum conlaminanllevel. NO -Not detected allhe reporting limit. Page 12 of 28 Er\ERGY :1' -J I. ,\, I I r ~ I . Halena, MT877-472-0711 • Billings, MT 8OD-735-4489 . Casper, WY 888-235-0515 Gillatts, WY 888-18&-7175 · Rapid City, so 888-&72-1225 . College Station, IX 888-&10-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp 1 st Quarter Groundwater 2011 C11020352-008 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: 03/15/11 Collection Date: 02/10/11 DateReceived: 02/11/11 Matrix: Aqueous MCL! QCl Method Analysis Date I By E170.1 02/11/11 10:15/ kbh MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 13 of 31 EN:RGY ."\. )f.:' J' I ~ 1 • www.energylab.com W/ytIaI~SbIu 1m HBlena, NT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 881-235-0515 Gil/etta, WY 8&6-188-7175 • Rapid City, so 888-&72-1225 • Collage Stalion, IX 881-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: LablD: Denison Mines USA Corp 1 st Quarter Groundwater 2011 C11020544-016 Client Sample ID: Temp Blank Analyses PHYSICAL PROPERTIES Temperature Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result Units 2.0 Qualifiers Rl Report Date: 03/24/11 Collection Date: 02/16/11 DateReceived: 02/18/11 Matrix: Aqueous MCU QCl Method Analysis Date 1 By E170.1 02118/11 09 :20 I kbh MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 25 of 44 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-Iabs.com Kyle F. Gross Laboratory Director RE: 1st Quarter Ground Water 2011 Dear Jo Ann Tischler: Lab Set ID: 1102080 American West Analytical Laboratories received 5 sample(s) on 2/4/2011 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 "SUff" 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 F . Digitally signed by Kyle F. Gross ON: cn=Kyle F. Gross, o=AWAL. ou=AWAL, emall=kyle@awal- labs.com, c=US Kyle Gross Date: 2011020714:01:59 '{]7'00' Approved by: Laboratory Director or designee j Report Date: 21712011 Page 1 0[21 All analyses applicable to the CWA, SDWA. and RCRA are performed in accordance to NELAC protocols. PertineDt sampling infonnation is located on the attached COCo This report is provided for the exclusive use of the addressee. Privileges ofsubsequcnt 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 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 pcrfonnance of inspection and/or analysis in good faith and according to the rules of the trade and of science. A AMERICAN Client: WEST ANALYTICAL LAB ORA TORIES 463 West 3600 South Salt Lake City, UT 84115 Project: Lab SetID: Date Received: Lab Sample ID 1l02080-001A 1102080-002A 1102080-003A 1102080-004A SAMPLE SUMMARY Denison Mines 1st Quarter Ground Water 2011 1102080 2/412011 1015h Client Sample ID Date Collected MW-ll 21212011 1250h MW-25 212/2011 13lOh MW-30 2/1/2011 1240h MW-31 2/1/2011 1435h 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 (801) 263-8686 Toll Free (888) 263-8686 Fax (801)263-8687 1102080-005A Trip Blank 2/1/2011 Aqueous VOA by GC/MS Method email: awal@awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer 8260CI5030C Report Date: 21712011 Page 2 0[21 All analyses applicable to the CWA, SDWA, and RCRA are perfonned in accordance to NELAC protocols. Pertinent sampling infonnation is located on the attached cac. Tbis report is provided fortbe exclusive use of the addressee. Privileges of subsequent use of the name oftrus 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 of this report for any purpose otber 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 scicncc~ 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 Volatile Case Narrative Client: Contact: Denison Mines Jo Ann Tischler January Monthly 1102080 Project: Lab SetID: Sample Receipt Information: Date of Receipt: Date(s) of Collection: Sample Condition: C-O-C Discrepancies: Method: Analysis: 2/4/2011 211 & 2/2/2011 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 (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: 21712011 Page 3 of21 All analyses applicable to the CWA, SDWA, and RCRA are performed in accordance to NELAC protocols. Pertinent sampling inronnatioD is Located on tbe attached COCo This repon is provided for the exclusive usc ortbe addressee. Privileges of subsequent use of the name of this company or any member of its staff, or reproduction of Ibis report in connection with the advertisement, promotion or sale of any product or process, or in connection with the re.publication oftrus 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 iu good faith and I:lccording to the rules of the trade and of science. A Client: Denison Mines Lab Set ID: 1102080 Project: 1st Quarter Ground Water 2011 Sample ID Analyte LCS VOC 020411A Tetrahydrofuran LCS VOC 020411A SUIT: 1,2-Dichloroethane-d4 LCS VOC 020411A SUIT: 4-Bromofluorobenzene LCS VOC 020411A SUIT: Dibromofluoromethane LCS VOC 020411A 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.labu:om, web: www.awal-Iabs.com QC SUMMARY REPORT Contact: Dept: Jo Ann Tischler MSVOA QC Type: LCS Amount Original Units Method Result Spiked Amount %REC Limits flg/L SW8260C 17.8 20.00 0 88.9 43-146 %REC SW8260C 48.8 50.00 97.5 69-132 %REC SW8260C 5004 50.00 101 85-118 %REC SW8260C 49.8 50.00 99.7 80-120 %REC SW8260C 50.1 50.00 100 81-120 Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limit Qual Date Analyzed 2/4/2011 1309h 2/4/2011 1309h 2/4/2011 1309h 2/4/2011 1309h 2/4/2011 1309h Report Date: 217/2011 Page 9 of21 All analyses applicable to the CWA. SDWA, and RCRA are performed in accordance to NELAC protocols. Peninent sampling information is located on the attached COCo This report is provided for the exclusive use oflhe 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 advet'lisement, promotion or sale of any product or procC$s, or in connection with the re-publication of this report for any purpose other than for the addressee will be granled only on contact. This company acceplS no responsibiliL), except for the due performaIH:e of in spec Lion a.nd/or analysis in good faith and according to the rules of !.he trade and ofscience. A Client: Denison Mines Lab Set ID: 1 102080 Project: 1st Quarter Ground Water 2011 Sample ID Analyte MB VOC 020411A Tetrahydrofuran MB VOC 020411A Surr: 1,2-Dichloroethane-d4 MB VOC 020411A Surr: 4-Bromofluorobenzene MB VOC 020411A Surr: Dibromofluoromethane MB VOC 020411A Surr: Toluene-d8 AMERICAN WEST ANALYTICAL LABORATORIES 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-Iabscom, 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 SW8260C < 1.00 SW8260C 50.0 50.00 100 69-132 SW8260C 53.3 50.00 107 85-118 SW8260C 49.9 50.00 99.8 80-120 SW8260C 51.2 50.00 102 81-120 Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limit Qual Date Analyzed 2/4/2011 1347h 2/4/2011 1347h 2/4/2011 1347h 2/4/2011 1347h 2/4/2011 1347h Report Date: 2nl2011 Page 10 of21 All analyses applicable to the CWA, SOW A, and ReRA are performed in accordance \0 NELAe protocols. Pertinenl sampling information is localed on the anached COCo Thili report is provided for the exclusive usc of the addressee. Privileges of subsequent use of the name of this company or any member of i1s staff. or reproduction of this report in connection with the advcrtiscmenl, promotion or sale of any product or process, or in connection wilh the re-publication orlhis 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 inspeclion and/or analysis in good faith and according to the rules of the trade and of science. A Client: Denison Mines Lab Set ID: 1102080 Project: 1st Quarter Ground Water 2011 Sample ID Analyte 1l020S0-001AMS Tetrahydrofuran 11020S0-001AMS SUIT: 1,2-Dichloroethane-d4 11020S0-001AMS SUIT: 4-Bromofluorobenzene 11020S0-001AMS SUIT: Dibromofluoromethane 11020S0-001AMS SUIT: 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: awaJ@awal-labs.com, web: www.awal-Iahs.com QC SUMMARY REPORT Contact: Dept: Jo Ann Tischler MSVOA QC Type: MS Amount Original Units Method Result Spiked Amount %REC Limits IlgiL SWS260C IS.5 20.00 0 92.7 43-146 %REC SWS260C 51.0 50.00 102 77-144 %REC SWS260C 50.3 50.00 101 SO-123 %REC SWS260C 50.S 50.00 102 SO-124 %REC SWS260C 50.0 50.00 99.9 80-125 Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limit Qual Date Analyzed 2/4/2011 1600h 2/4/2011 1600h 2/4/2011 1600h 2/4/2011 1600h 2/4/2011 1600h Report Date: 217/2011 Page 11 of21 All analyses applicable 10 the CWA. SDWA, and RCRA are performed in accordance to NELAC protocols. Pertinenl sampling infannation is located on the altached cac This report is provided for the exclusive usc of the addressee. Privileges of subsequent use oftbe name of this company or any member of its staff. or reproduction of this report in connection with the advcJtisemenl, promotion or sale of any producL or process, or in connection with the re·publication of this report for any purpose other than for the addressee wilt be granted only on contact. This company acceplS no responsibility except fOT lhe due performance of inspection andlor analysis in good faith and according 10 the rules of the trade and of science. A Client: Denison Mines Lab Set ID: 1102080 Project: 1st Quarter Ground Water 2011 Sample ID Analyte 11020S0-001AMSD Tetrahydrofuran 11020S0-001AMSD Surr: 1,2-Dichloroethane-d4 11 020S0-00 1 AMSD Surr: 4-Bromofluorobenzene 11020S0-001AMSD Surr: Dibromofl uoromethane 11020S0-001AMSD Surr: To1uene-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.lahs,com, web: www.awal-Iabs.com QC SUMMARY REPORT Contact: 10 Ann Tischler Dept: MSVOA QC Type: MSD Amount Original Units Method Result Spiked Amount %REC Limits ).lg/L SWS260C IS.4 20.00 0 92.0 43-146 %REC SWS260C 51.0 50.00 102 77-144 %REC SWS260C 49.2 50.00 9S.3 SO-123 %REC SWS260C 50.9 50.00 102 SO-124 %REC SW8260C 49.7 50.00 99.4 SO-125 Kyle F_ Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limit Qual 0 25 Date Analyzed 2/4/2011 1619h 2/4/2011 1619h 2/4/2011 1619h 2/4/2011 1619h 2/4/2011 1619h Report Date: 2n12011 Page 12 of21 All analyses applicable to the CWA. SOW A, and RCRA are performed in accordance 10 NELAC protocols, Pertinent sampling information is tocaLed on the anacned 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, orreproduclion of this report in connection with che advertisement, promotion or sale of any product or process, or in connection wilh the re-publication of this report for any purpose other than for lbe addressee will be granted only on con1act This company accepts no responsibility except for we due performance of in spec lion and/or analysiS in sood faith and according 10 the rules afthe trade and of science. Data Path Data f'ile Acq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\I\DATA\FEBII-C\04f'EBllA\ X77L0801.D 4 f'eb 2011 2 :06 pm 1102080-001)\. SAMP 5 .0ML lOf'3 6 Sample Mu ltiplier : 1 Quant Time: Feb 04 14 :20;59 2011 Ouant Method C:\MSDCHEM\1\METHODS\AFULLW_28.M Quant Title VOA Calibration QLast Update Fri Jan 28 11 :22:43 2011 Response via Initial Calibration (QT Reviewed) ~undance TIC: X77L0801 YMata~ms "00000 ~ I 1500000 1400000 ~ - , i I 1300000 I j • q 1200000 I ~ -Ii , j ~ Ii 1100000 1000000 900000 800000 700000 I • J .! I 0 ~ , ~ 600000 SOOOOO 400000 300000 200000 100000 0 mme-> 2.00 2.SO 3.00 3.SO 4.00 4.50 5.00 5.50 6.00 6.SO 7.00 7.SO 8.00 AFULLW_28 .M f'ri f'eb 04 15 :03 :53 2011 8.SO 9.00 9.SO 10.00 10.50 11.00 11.50 Data Path Data file A.cq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\l\DATA.\fEBlI-C\04fEB1lA\ X78L0802.D 4 reb 2011 2 :25 pm ll02080-002A SAMP 5 .DML lOf3 7 Sample Multiplier: 1 Quant Time: feb 04 15:00 :54 2011 Quant Method C:\MSDCHEM\1\METHODS\AfULLW_28 .M Quant Title VOA Calibration QLast Update fri Jan 28 11 :22 :43 2011 Response via Ini tial Calibration (OT Review ed) Abundan " TIC: X78L0802.O\dala.ms 1600000 ~ ! 1500000 i 0 1400000 ~ , I I , , ~ • i • .i ~ 1300000 1200000 1100000 1000000 900000 800000 700000 • I • I ,! " ~ ,j 800000 500000 "'0000 300000 200000 100000 0 'Time·-> 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 AFULLW-28 .M Fri Feb 04 15 :04 :27 2011 8.50 9.00 9.50 10.00 10.50 11 .00 11.50 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\l\DATA\FEBII-C\04FEB11A\ X79LOB03.D 4 Feb 2011 2 :4 4 pm 1102080-003A SAMP 5 .0ML IOP3 B Sample Multiplier: 1 Quant Time: Feb 04 15 :01 :30 2011 Quant Method C :\MSDCHEM\1\METHODS\AFULLW_28 .M Quant Title VOA Calibration QLast Update Pri Jan 28 11 :22 :43 2011 Response via Initial Calibration (QT Reviewed) r"~'"~ TIC' X79L0803.D\data.ms 1500000 1400000 ~ i 1300000 j 1 0 ~ 1200000 1100000 1000000 " j I ~ , ~ ! I • • • Ii 900000 800000 700000 600000 " , 500000 i ] I ~ 400000 j ,j JOOOOO 200000 100000 o iTime··> 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.~8.00 8.50 9.00 AFULLW_28 .M Fei Feb 04 15 :05 :01 2011 9.50 10.00 10.50 11.00 II.d Report Dale: 2nn1j""'''l'tlgCllS or21 Data Path Data File Acq On Operator Sample Mise ALS Vial Quantitation Report C ;\msdchem\1\DATA\FEBII-C\04F~BIIA\ X80L0804 .D 4 Feb 2011 3 ;03 pm 1102080-0041>. SAMP 5 .0ML 10F3 9 Sample Multi plier ; 1 Quant Time ; Feb 04 15 ;41;41 2011 Quant Method C : \t~S1)CHEM\l \ME:THODS\AFULLW_28 . M Quant Title VOA Calibra~ion QLast Update Fri Jan 28 11 :22 ;43 2011 Response via Initial Calibration (QT Reviewed) j iAbuncfimCB TIC: X80L0804.D\dala~ 1500000 I 1400000 1300000 1200000 1100000 1000000 900000 800000 700000 600000 500000 400000 300000 200000 100000 o [Time-> A AFULLW_28 .. M Fri Feb 04 15 :42 :27 2011 1 t en ! ~ 2 i ~ ... I! ~ .II ~ '" I: 6l 5 en ti '" ~ ;-~ I ~ rIl. i i!! III :!l " f! ~ '" ..... ~ 9 '" i '5 Iii E I! 1/ <II If' I: ~ ::> en ~ ~ Report Dale: 217J2ijJllgWagcBJ6 of21 Quantitation Report (QT Rev iewed 1 Data Path Data File Aeq On Operator Sample Mise ALS Vial C:\msdehem\1\OATA\FEBII-C\04FEB11A\ X81L0805.D 4 Feb 2011 3 :22 pm 1102080-005A SAMP 5 .0ML 10F3 10 Sample Multiplier : 1 Quant Time : Feb 04 15:42 :11 2011 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_28 .M Quant Title VOA Calibration QLast Update Fri Jan 28 11 :22 :43 2011 Response via Initial Calibration \6.bvndance TIC: X81L0805.O\dall.ms 1500000 i 1400000 I 0 1300000 ; 1200000 1100000 .. 1000000 J ~ 9()0000 ""0000 700000 "",,00 500000 400000 300000 200000 100000 o ' i I I i ." 0 I ~ ~ a Tlme--> 2.00 2.50 3.00 3,50 4.00 4.50 5.00 5.50 6.00 6.f19 7.00 7.5Q..2.00 6.50 9.00 9.50 10.00 10.50 11.00 11.50 AFULLW_28 .M Fri Feb 04 15 :43 :01 2011 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via Abuli(iance 2900000 2800000 2700000 2600000 2500000 2400000 2300000 2200000 2100000 2000000 1900000 1800000 1700000 1600000 1500000 1400000 1300000 1200000 1100000 1000000 900000 800000 700000 Quantitation Report C:\msdehem\1\DATA\FEBll-C\04FEBllA\ X74LCS20.D 4 Feb 2011 1:09 pm LCS VOC 020411A LCS SEE COVERSHEET FOR ID AND AMOUNTS 3 Sample Multiplier: 1 Feb 04 13:21:24 2011 C:\MSDCHEM\1\METHODS\AFULLW_28.M VOA Calibration Fri Jan 28 11:22:43 2011 Initial Calibration (Not Reviewed) TIC: X74LCS20.D\data.ms '" «i ] '" ~ ~ (j) ~ 0. .. E AFULLW_28.M Fri Feb 04 15:06:49 2011 Data Path Data File Acq On Operator Sample Mise ALS Vial Quantitation Report C:\msdchem\1\DATA\FEBII-C\04FEBIIA\ X76LMBLK.D 4 feb 2011 1 :47 pm MB VOC 020411A MBLK 5 .0ML 5 Sample Multiplier: 1 Quant Time: Feb 04 14 :21 :44 2011 Quant Method C:\MSDCHEM\1\METHODS\AFU LLW_28 .M Quant Title VOA Calibration QLast Update Fei Jan 28 11 :22 :43 2011 Response via Initial Calibration Abundance 1600000 1500000 1400000 1300000 1200000 1100000 1000000 900000 800000 700000 600000 500000 <00000 300000 200000 100000 I @ (QT Rev iewed) ~ I 0 ~ ~ I • J t I , ~ I J Time-> o~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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_28 .M Fri Feb 04 15:07 :23 2011 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via I'.bundance 3000000 2900000 2800000 2700000 2600000 2500000 2400000 2300000 2200000 2100000 2000000 1900000 1800000 1700000 1600000 1500000 1400000 1300000 1200000 1100000 1000000 jrime-> Quantitation Report C:\msdehem\1\DATA\FEB11-C\04FEB11A\ XS3S0S01.D 4 Feb 2011 4:00 pm 11020S0-001AMS MS 5.0ML 20F3 12 Sample Multiplier: 1 Feb 04 16:12:09 2011 C:\MSDCHEM\1\METHODS\AFULLW_2S.M VOA Calibration Fri Jan 2S 11:22:43 2011 Initial Calibration AFULLW_2S.M Fri Feb 04 16:12:57 2011 (Not Reviewed) E 1:' i ~[ ~~ '~'_,"",,""'''\.Il X 6 Report Date: 21712{i'j3)gEVllge'k20 of21 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via I I undance 2700000 2600000 2500000 2400000 2200000 2100000 2000000 1900000 1800000 1700000 1600000 1500000 1400000 1300000 1200000 ~Ime-> Quantitation Report C:\msdehem\1\DATA\FEB11-C\04FEB11A\ X84D0801.D 4 Feb 2011 4:19 pm 1l02080-001AMSD MSD 5.0ML 20F3 13 Sample Multiplier: 1 Feb 04 16:31:08 2011 C:\MSDCHEM\1\METHODS\AFULLW_28.M VOA Calibration Fri Jan 28 11:22:43 2011 Initial Calibration (Not Reviewed) TIC: X84D0801 .Dldata.ms "'. ~ .. c: " .il 0 >-5 (/) ~ ~ 1l ~ u: 0 >-~ AFULLW_28.M Fri Feb 04 16:36:41 2011 Report Date: 21712Q'JlIgEp'lIge'l21 of21 American West Analytical Laboratories WORK ORDER Summary Work Order: 1102080 Client: Denison Mines Page 1 of 1 Client ID: DENI00 Contact: J 0 AlUl Tischler 2/4/2011 Project: 1st Quarter Ground Water 2011 QC Level: LEVEL III WOType: Project Comments: No Hard Copies (UL). QC 3 & Summary. EDD-CSV. Report THF to 1 ~.: ~t? Sample ID Client Sample ID Collected Date Received Date Date Due Matrix Test Code Sel Storage 11 020S0-00 lA MW-l1 2/2/2011 12:50:00 PM 2/4/2011 10:15:00 AM 2/1S/2011 Aqueous 8260-W 21 VOCFridge 3 1l020S0-002A MW-25 212/2011 1:10:00 PM 2/1S/2011 S260-W VOCFridge -11020S0-003A MW-30 2/1/2011 12:40:00 PM 2/1S/2011 S260-W VOCFridge 11020S0-004A MW-31 21112011 2:35:00 PM 2/18/2011 8260-W VOCFridge 11020S0-005A Trip Blank 2/112011 2/18/2011 S260-W VOCFridge Sheet 1 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 Pro·ect 1 st Quarter Ground Water 2011 Sample 10 MW-11 MW-25 MW-30 MW-31 Trip blank Date Collected 2/2/2011 212/2011 2/1/2011 211/2011 i-JI/-'bll Samplers Name Tanner Holiida Time Collected Laboratory Analysis Requested 1250 THF 1310 THF 1240 THF 1435 THF Please notify Ryan Palmer of Reciept tempature on these samples Immediatelyl Thank you. Relinquished By:(Signature) Relinquished By:(Signature) DatefTime Received By:(Signature) 2/3/2011 1300 DatefTime DatefTime Lab Set ill: 11 D1J\<iD San].ples Were: COC Tape Was: Container Type: /rNo.Rec. arShipped By: l . 'V<::) P~t on Outer Package o A W AL Supplied Plastic / D Hand Delivered es ONo ON/A o A W AL Supplied Clear Glass / o Ambient Unbro~n on Outer package o A WAL Supplied Amber Glass /' EVChilled lJ-Yes 0 No 0 N/A Temperature ~-),~ °C Present on Sample DYes ~ ON/A o A WAL Supplied vo~::;t:::2X Vials o Amber 0 Clear 0 He :> ace 0 No Headspace Rec. Broken/Leaking DYes rn-No ON/A o NOll A W AL SupWt€cl Container Notes: Properly Preserved Notes: Rec. Witllln Hold Notes: Bottle Type Ammonia COD Cyanide Metals N02 &N03 Nutrients O&G Phenols Sulfide TKN TOC TP04 TPH Procedure. 1) 2) 3) 4) 5) .6) 7) Unbroken on sa~e V ,/ DYes ONo N/A UYes DNa ON/A Notes: / I}(yes ONo Discrepancies Between Labels and COC Preservative All pHs OK pH <2 H2SO4 pH <2 H2SO4 PH >12 NaOH pH <2HN03 pH <2 H2SO4 pH <2 H2SO4 pH<2HCL pH <2 H2SO4 pH> 9NaOH. ZnAC pH <2 H2SO4 pH <2 H3P04 -,,,/ pH <2 H2SO4 /" pH <2 HCL // /" /' // V Pour a small amount of sample in the sample lid Pour sample from Lid gently aver wide range pH paper Do Not dip the pH paper in the sample battle or lid Notes: /" ../' ~/ ,// ~/ 1/ / ".- If sample is not preserved properly list its extension and receiving pH in the appropriate column above Flag COC and notify client for further instructions Place client conversation on COC Samples may be adjusted at client request _\6 ./ / L" V DYes ll1'fo 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 RE: 1st Quarter Ground Water 2011 Dear Jo Ann Tischler: Lab Set ID: 1102168 American West Analytical Laboratories received 4 sample(s) on 211112011 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 DaI8:2011.02.1715:05:16-07"00· Approved by: t....-__________ ~ Laboratory Director or designee Report Date: 2/17/2011 Page I of 21 All analyses applicable to the CWA, SDWA, and ReRA are perfonned in accordance to NELAC protocols. Pertinent sampling infonnation is located 00 the attacbed COCo This report is provided for the exclusive use oflhe addressee. Privileges of subsequent usc of the name of this company OT any member of its staff, or reproduction of this report in connection with tbe 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 ell(cept for the due perfonnance of inspection and/or analysis in good raith and according to the rules of tbe trade and of science. A AMERICAN Client: 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 Project: Lab Set ID: Date Received: Lab Sample ID 1102168-001A l102168-002A 1102168-003A l102168-004A SAMPLE SUMMARY Denison Mines 1st Quarter Ground Water 2011 1102168 2/11/2011 0945h Client Sample ID Date Collected MW-14 21712011 1300h MW-22 218/2011 1215h MW-65 218/2011 1215h Trip Blank 21712011 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: 2117/2011 Page 2 of 21 All analyses applicable to the CWA, SDWA, and ReRA arc 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 ar sale of any product or process, Of in connection with the fe-publication of this report for any purpose other than for Ihe 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 tbe nIles 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-Iabs.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: 1 st Quarter Ground Water 20 11 1102168 2/11/2011 217 & 2/8/2011 Intact None SW-8468260C/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 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: 2117/2011 Page 3 of21 All analyses applicable to the CWA, SDWA, and ReRA are performed 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 subsequent usc of the name of this company or any member of its staff, or reproduction oftbis report in emmection with the advertisement, promotion or sale of any 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 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: 1102168 Project: 1st Quarter Ground Water 2011 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: QCType: Jo Ann Tischler MSVOA LCS --- Amount Original SampleID Analyte Units Method Result Spiked Amount %REC Limits LCS VOC 021111A Tetrahydrofuran flglL SW8260C 17.9 20.00 0 89.5 43-146 LCS VOC 021111A Surr: 1,2-Dichloroethane-d4 %REC SW8260C 5l.3 50.00 103 69-132 LCS VOC 021111A Surr: 4-Bromofluorobenzene %REC SW8260C 50.1 50.00 100 85-118 LCS VOC 021111A Surr: Dibromofluoromethane %REC SW8260C 50.6 50.00 101 80-120 LCS VOC 021111A Surr: Toluene-d8 %REC SW8260C 50.2 50.00 100 81-120 Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limit Qual Date Analyzed 2/1112011 0905h 2/1112011 0905h 211112011 0905h 2/11/2011 0905h 2/1112011 0905h Report Date: 2117/2011 Page 8 of 21 AU analyses applicable to the CWA., SDWA, and ReRA are performed in accordance to NELAe 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 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 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: 11 02168 Project: 1 st Quarter Ground Water 2011 SampleID Analyte MB VOC 021111A Tetrahydrofuran MB VOC 021111A SUIT: 1,2-Dichloroethane-d4 MBVOC021111A SUIT: 4-Bromofluorobenzene MB VOC 0211l1A SUIT: Dibromofluoromethane MB VOC 021111A SUIT: Toluene-dS AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (80 I) 263·8686, Toll Free (888) 263·8686, Fax (80 I) 263·8687 e-mail: awal@awal-Iabs.com.web:www~awal-Iabs.com QC SUMMARY REPORT Contact: Jo Ann Tischler Dept: MSVOA QC Type: MBLK Amount Original Units Method Result Spiked Amount %REC Limits IlglL SWS260C <1.00 %REC SWS260C 50.S 50.00 102 69-132 %REC SWS260C 53.7 50.00 107 S5-11S %REC SWS260C 49.9 50.00 99.9 SO-120 %REC SWS260C 51.S 50.00 104 SI-120 Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limit Qual Date Analyzed 2/11/2011 OS46h 2/1112011 OS46h 2/11120 II OS46h 2/11/2011 OS46h 2111/2011 OS46h Report Date: 2/17/2011 Page 9 of21 All analyses Dpplicable La tbe CWA, SDWA, and ReRA are performed in accor&nce to NELAC protocols. Pertinent sampling infonnation is located on the attached cac .. This report is provided for the exclusive use of the addressee~ Privileges of subsequent use oftbe name afmis company or any member of iLs staff, or reproduction of this report in connection with the advertisement, promotion or sale of any product or process, or in connecLion with llle re-publication of this report for any purpose Olher than for the addressee will be gnmted only on contacL This company accepts no responsibility excepl for the due performance of inspection andlor analysis in good faith and according to me rules of the trade: and of science, A Client: Denison Mines Lab Set ID: 1102168 Project: 1st Quarter Ground Water 2011 Sample ID Analyte 110216S-001AMS Tetrahydrofuran 110216S-001AMS SUIT: 1,2-Dichloroethane-d4 11 0216S-00 1 AMS SUIT: 4-Bromofluorobenzene 110216S-001AMS SUIT: Dibromofluoromethane 11 0216S-00 lAMS SUIT: Toluene-dS 1102172-00IAMS Tetrahydrofuran 1102172-001AMS SUIT: 1,2-Dichloroethane-d4 1102172-001AMS SUIT: 4-Bromofluorobenzene 1102172-00IAMS SUIT: Dibromofluoromethane 11 02172-00 I AMS SUIT: 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: awaJ@awal-labs,com, web: www,awal-Iabs com QC SUMMARY REPORT Contact: Dept: Jo Ann Tischler MSVOA QCType: MS Amount Original Units Method Result Spiked Amount %REC Limits Ilg/L SWS260C 21.6 20.00 0 lOS 43-146 %REC SWS260C 51.0 50.00 102 77-144 %REC SWS260C 50.0 50.00 100 SO-123 %REC SWS260C 50.9 50.00 102 SO-124 %REC SWS260C 49.9 50.00 99.S SO-125 Ilg/L SWS260C 37.3 20.00 12.33 125 43-146 %REC SWS260C 4S.1 50.00 96.2 77-144 %REC SWS260C 50.3 50.00 101 SO-123 %REC SWS260C 49.6 50.00 99.1 SO-124 %REC SWS260C 50.S 50.00 102 SO-125 Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limit Qual Date Analyzed 2/1112011 1253h 211112011 1253h 211112011 1253h 2111/2011 1253h 211112011 1253h 2/1112011 1447h 2/11/2011 1447h 2/1112011 1447h 2/11/2011 1447h 2/1112011 1447h Report Date: 2117/2011 Page 10 of 21 All analyses applicable to the CWA, SOW A, and ReRA are performed in accordance 10 NELAC protocols. Pertinent sampling infonmnion is located on the attached cac, This report is provided for the exclusive use of tbe addressc=:e. Privileges of subsequent use oflhe 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 conl.act This company accepts no responsibility except for the due performance of inspection andiOT analysis in good faith and according 10 the rules of1he lIade and of science. A Client: Denison Mines Lab Set 10: 1102168 Project: 1st Quarter Ground Water 2011 SampleID Analyte 110216S-001AMSD Tetrahydrofuran 110216S-001AMSD Surr: 1,2-Dichloroethane-d4 110216S-001AMSD Surr: 4-Bromofluorobenzene 110216S-001AMSD Surr: Dibromofluoromethane 110216S-001AMSD Surr: Toluene-dS 1l02172-001AMSD Tetrahydrofuran 1102172-001AMSD Surr: 1,2-Dichloroethane-d4 l102172-001AMSD Surr: 4-Bromofluorobenzene 1102172-001AMSD Surr: Dibromofluoromethane 1102172-001AMSD Surr: Toluene-dS AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Units J.1glL %REC %REC %REC %REC J.1g/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-Iabs_com QC SUMMARY REPORT Contact: Dept: QCType: Amount Original Jo Ann Tischler MSVOA MSD Method Result Spiked Amount %REC Limits SWS260C 21.6 20.00 0 lOS 43-146 SWS260C 51.3 50.00 103 77-144 SWS260C 51.1 50.00 102 SO-123 SWS260C 50_6 50.00 101 SO-124 SWS260C 50.5 50.00 101 SO-125 SWS260C 37.4 20.00 12.33 125 43-146 SWS260C 49.2 50.00 9S.4 77-144 SWS260C 50.7 50.00 101 SO-123 SWS260C 50.3 50.00 101 SO-124 SWS260C 50.5 50.00 101 SO-125 Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limit Qual 0.27S 25 0.294 25 Date Analyzed 211112011 1312h 211112011 1312h 2/11/2011 1312h 2/1112011 1312h 2/11/2011 1312h 2/11/2011 1506h 2/1112011 1506h 2/11/2011 1506h 2/1112011 1506h 211112011 1506h Report Date: 2117/20 II Page II of 21 All analyses applicable La the CWA, SDWA, and RCRA are perfonned in accordance lO NELAC protocols Pertinent sampling information is locaLed on the attached CDC. This report is provided for the exclusive use of the addressee~ Privileges of subsequent use of the name afmis 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 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 of the trade and of science. Data Path Data file Acq On Operator Sample Mise ALS Vial Quantitation Report C:\msdchem\l\DATA\fEBII-C\llfEBIIA\ ZlOL1681 .D 11 feb 2011 11 :37 am 1102168-001A SAMP 5.0ML lOf3 12 Sample Multiplier: 1 Quant Time : feb 11 13 :39 :27 2011 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_28 .M Quant Ti tle VOA Calibration QLast Update Fri Jan 28 11 :22 :43 2011 Response via Initial Calibration (OT Reviewed) Abundance 1600000 TIC: ZI OLl6S1 D\dala.ms 1500000 1400000 1200000 1100000 J "00000 900000 '00000 700000 600000 500000 400000 300000 200000 100000 TIme--> Ol~~~~~~-T~~~~~~~~~~~~~~~~~~~~ 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_28 .M Fri Feb 11 14 :13 :40 2011 Page : 4 ReponDale; 211712011 Page 12of21 Data Path Data File Acq On Operator Sample Mise ALS Vial Quantitation Report C:\msdchem\1\DATA\FEB11-C\11FEBI1A\ ZllLl682 . D 11 Feb 2011 11:56 am l102168-002A SAMP 5 .0ML 10F3 13 Sample Multiplier: 1 Quant Time : Feb 11 13 : 40 : 12 2011 Qua,nt Method C: \MSDCHEM\l \METHODS\AFULL'C28 . M Quant Title VOA Calibration QLast Upd ate Fri Jan 28 11 :22 :43 2011 Response via Initial Calib ration (QT Revie,~ed) Abundance TIC: Z11L1682.D\data.rns 160000 0 iii 1500000 i ~ :l! 0 ~ 1400000 .j i 130.0000 "!. ~ .0 e g t ~ ~ 'i' " ". .b Ii 0 1 >-if !!l 0 e ~ m ~ 1200000 1100000 1000000 <II 900000 800000 700000 <II ! <II ~ !! e ~ ~ g ~ j ~ Gl Cl ~ t= Jl § <II 600000 500000 400000 300000 200000 100000 o A ~ l\. I I I I I I I I Tim!!-> 2.0Q 2.50 ~:OO ~.?"Q 4:90 4~50 5,00 ~.50 6.00 6.50 7.00 7.50 8,00 8.59 9.00 9.5,0 10.00 10.50 11.00 11.50 AFUL LW_ZS.M Fri Feb 11 14 :14 :01 2011 Paqe : 4 Repon Date: 211712011 Page 13 of21 Data Path Data File Acq On Operator Sample Mise ALS Vial Quantitation Report C : \msdchem\l \ DAtA \FEB11-C\llFEB1l1l. \ Z12L1683.D 11 reb 2011 12:15 pro 1102168-003A SAMP 5.0ML 10F3 1f Sample Multiplier: 1 Quant Time: Feb 11 13 :40 :50 2011 Quant Method C:\MSDCHE:M\1\METHODS\AFULLW_28 .M Quant Title VOA Calibration QLast Update Fri Jan 28 11 :22:43 2011 Response via Initial Calibration (QI Reviewed) Abundance TIC: Z12L 16S3.D\dala.rns 1600000 1500000 1400000 1 1300000 1200000 1100000 1000000 900000 800000 700000 600000 500000 400000 300000 200000 100000 i '" ~ 1 0 ~ ~ ~ .2 0 :fi ~ 0 0 1 ~ 1:: VI " VI u;- l I e ~ 0 ~ -. 1 1 i :fi ~~ 2 c ~ I-!!! 1 ~ <D j 5 VI 0 " Ii: ~ l A A It A- I J I I I o 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.QQ 8.50 \J~05> 9.50_1.1.l.QQ lQ.~O 11.00 11 :5j Tlme-> A:FULLW_2S.M Fri Feb 11 14:J.4:15 2011 Page : 4 ReponOatc: 211712011 Page 14of21 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\DATA\FEB11-C\11FEB11A\ Z13L1684. D 11 Feb 2011 12:34 pm 11 0216 8-0 0 4A SAMP 5.0ML 10F3 15 Sample Multiplier: 1 Quant Time: Feb 11 13:41:25 2011 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_28.M Quant Title VOA Calibration QLast Update Fri Jan 28 11:22:43 2011 Response via Initial Calibration (QT Reviewed) Abundance TIC: Z13L 1684.Dldata.ms 1500000 1450000 1400000 1350000 1300000 12.50000 1200000 1150000 1100000 1050000 1000000 950000 900000 850000 800000 750000 700000 650000 600000 en iii en 550000 fa ~ ~ '" 500000 E ~ E c E 450000 ~ ~ is ~ N_ 400000 is !i !i en CIl 350000 300000 250000 200000 150000 100000 50000 Time-> o .l V. 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.~0 8.00 8.50 9.00 910 10.00 10:50 11.00 11.50 AFULLW_28.M Fri Feb 11 14:14:26 2011 Page: 4 Report Date: 2117/2011 Page 15 of 21 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\l\DATA\FEBII-C\IIFEBIIA\ Z02LCS20.D 11 Feb 2011 9:05 am LCS VOC 021111A LCS SEE COVERSHEET FOR ID AND AMOUNTS 3 Sample Multiplier: 1 Quant Time: Feb 11 09:17:33 2011 Quant Method C:\MSDCHEM\I\METHODS\AFULLW_28.M Quant Title VOA Calibration QLast Update Fri Jan 28 11:22:43 2011 Response via Initial Calibration (Not Reviewed) .Abundance TIC: Z02LCS20.Dldata.ms 2200000 2100000 2000000 1700000 I 1600000 1500000 ! E AFULLW_28.M Fri Feb 11 13:10:39 2011 Page: 4 Report Date: 2117/20 II Page 16 of 21 Data Path Data file Aeq On Operator Sample Mise ALS Vial Quantita tion Report C :\msdehem\l\DATA\FEBll-e\llF'EBllA\ ZOlLMBLK.D 11 Feb 2011 8:46 am MB voe 021111A MBLK S.OM!. 5 Sample Multiplier : 1 Quant Time : Feb 11 13 :09 :31 2011 Quant Method C:\MSDCHEM\1\METHODS\AF'ULLW_28 .M Quant Title VOA Calibration QLast Update Fri Jan 28 11 :22 :43 2011 Response via Initial Calibration (QT Reviewed) Abundance TIC·lOILMBLK.D'ldata.ms 1600000 1500000 1400000 1300000 1200000 1100000 I I 1000000 900000 800000 700000 500000 I 1 200000 100000 o 1 iTlme-> 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 6.50 1.00 1.50 8.00 8.50 9.00 9.50 10.00 10.50 11.00 11.50 AFULLW_2B .M Fri Feb 11 13 :09 :37 2011 Page: 4 Repon Dale: 2/1712011 Page 17 of21 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\I\DATA\FEBII-C\IIFEBIIA\ Z14S1681. D 11 Feb 2011 12:53 pm 1l02168-001AMS MS 5.0ML 20F3 16 Sample Multiplier : 1 Quant Time: Feb 11 13:05:18 2011 Quant Method C:\MSDCHEM\I\METHODS\AFULLW_28.M Quant Title VOA Calibration QLast Update Fri Jan 28 11:22:43 2011 Response via Initial Calibration (Not Reviewed) Abundance 2400000 TIC: Z14S1681.D\data.ms 2300000 2200000 2100000 2000000 1900000 18000'00 1700000 "' t 1500000 1 1400000 E q " I 0 a: I ~ ! " oOi> em ~I ~ ~~ ~ ~~~ W 0 '0 .!l ~ime--> 2. AFULLW_28.M Fri Feb 11 14:14:41 2011 " ~ " I g I i f ~ t ~ ~:;: 'lI.-.. z j Page: 4 Report Date: 2117/2011 Page 18 of 21 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdchem\1\DATA\FEB11-C\11FEB11A\ Z20S1671. D 11 Feb 2011 2 :47 pm 1102 1 72 -001AMS MS 5.0ML 20F3 22 Sample Multiplier: 1 Quant Time : Feb 11 14 :59:30 2011 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_28 .M Quant Title VOA Calibration QLast Update Fri Jan 28 11:22 :43 2011 Response via I nitial Calibration (Not Reviewed) TIC: Z20S1671 .D\data.ms Time-> AFULLW_28.M Fri Feb 11 17:37:25 2011 III I. "" " "''' " ~ ~ ~ Ill") II .,1 '" .. ." 11 .50 Page: 4 Report Date: 2117/2011 Page 19 of 21 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via 1200000 1100000 1000000 900000 800000 rrlf!1e--> Quantitation Report C:\msdehem\l\DATA\FEBll-C\llFEBllA\ Z15D1681.D 11 Feb 2011 1:12 pm 1l02168-001AMSD MSD 5.0ML 30F3 17 Sample Multiplier: 1 Feb 11 13:24:11 2011 C:\MSDCHEM\1\METHODS\AFULLW_28.M VOA Calibration Fri Jan 28 11:22:43 2011 Initial Calibration (Not Reviewed) TIC: Z15D1681 .D\data.ms AFULLW_28.M Fri Feb 11 14:14:56 2011 Page: 4 Report Date: 2117/20 II Page 20 of 21 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\FEBII-C\11FEBIIA\ Z21D1671.D 11 Feb 2011 3:06 pm 1l02172-001AMSD MSD 5.0ML 30F3 23 Sample Multiplier: 1 Feb 11 15:18:36 2011 C:\MSDCHEM\1\METHODS\AFULLW_28.M VOA Calibration Fri Jan 28 11:22:43 2011 Initial Calibration (Not Reviewed) \l\bundance TIC: Z21D1671.Dldata.ms '" i I E 1200000 1100000 1000000 900000 800000 700000 200000 100000 ;rime--> 2.00 AFULLW_28.M Fri Feb 11 17:38:01 2011 Page: 4 Report Date: 2117/2011 Page 21 of 21 American West Analytical Laboratories "VORK ORDER Summary Work Order: 1102168 Client: Denison Mines Page 1 of I Client ID: DEN I 00 Contact: 10 Ann Tischler 2111/20 J 1 Project: I st Quarter Ground Water 20 I I QC Level: LEVEL n I WOType: Project Comments: No Hard Copies (UL). QC 3 & Summary. EDD-CSV. Report THF to I j.l~~~1¥f~ 1)fQ Sample ID Client Sample ID Collected Date Received Date Date DUe Matrix Test Code Sel Storage 1 1021 68·00lA MW·14 2n12011 J :00:00 PM 211112011 9:45:00 AM 2/251201 1 Aqueous 8260·W ~ VOCFridge :3 II02168-002A MW-22 21812011 12:15:00 PM 2125/2011 8260-W ~ VOCFridge Ll02168-003A MW-65 2/25/201 1 8260-\\1 VOCFridge IlO2168-004A Trip Blank 211/201 I 2/25/2011 8260·W VOCFridge Sheet 1 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 . t rOJec S amplers N ame S amplers S· Ignature 1 st Quarter Ground ;JAAA\OCMJU-Water 2011 Tanner Holliday -V Date Time Sample 10 Collected Collected Laboratory Analysis Requested MW-14 2/7/2011 1300 THF MW-22 2/8/2011 1215 THF MW-65 2/8/2011 1215 THF THF Trip blank tJ.1"'~1I / V Please notify Ryan Palmer of Reciept tempature on these samples Immediately! Thank you . Relinquished By:(Signature) .]~ A~<r'JL ___ ""'- DatelTime Received By:(Signature) 2/10/2011 1300 DatelTime Dafeqime '2/11 11 ~ S Lab Set ID: \ \ D 2-\ I..a c:[ Sam.,ples Were: COC Tape Was: Container Type: ~hipjJed By: lL-Y'~ P~t on Outer Package D A W AL Supplied Plastic o Hand Delivered es DNa ON/A o A WAL Supplied Clear Glass o Ambient un~n on Outer package o A WAL Supplied Amber Glass /' u;rChilIed es DNa ON/A Temperature ).l1 DC presen~ample o A WAL Supplied VOA/TOC/T~ o Amber 0 Clear 0 Headspace 0 Headspace Rec. BrokenlLeaking DYes llYN a ON/A DYes a ON/A o Non A WAL Supplied Co~er Notes: Unbroken on sa= / / DYes DNa fA Properly Preserved IifYes DNo ON/A Notes: Notes: Rec. Within Hold [}(Yes ONo Discrepancies Between Labels and CDC Notes: Bottle Type Ammonia COD Cyanide Metals N02 &N03 Nutrients O&G Phenols Sulfide TKN TOC TP04 TPH Procedure: Notes: / Preservative All pHs OK / pH <2 H2SO4 /,/ pH <2 H2SO4 L'" PH >12 NaOH ./' pH <2HNO. / pH <2 H2SO4 / .pH <2 H2SO4 V 1) 2) 3) 4) 5) . 6) 7) pH<2 HCL / pH <2 H2SO4 V pH > 9NaOH, ZnAC /' pH <2 H2SO4 V pH <2 H3P04 /' pH <2 H2SO4 /' pH <2HCL /' , Pour a small amount of sample in Ihe 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 receiving pH in the appropriate column above Flag COC and notify client for further instructions Place client conversation on COC Samples may ~e adjusted at client request ~ - No . Rey.~ . I' /' ",/ / DYes ~o --- 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-Iabs.com Kyle F. Gross Laboratory Director RE: 1st Quarter Ground Water 2011 Dear Jo Ann Tischler: Lab Set ID: 1102272 American West Analytical Laboratories received 7 sample(s) on 211812011 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 F . Digitally signad by Kyle F. Gross ON: cn=Kyle F. Gross, o=AWAL, ou=AWAL, emBil=kyle@awal- labs com, c=US Kyle Gross Date: 2011.02 2414:33:55 -OTOO' Approved by: Laboratory Director or designee Report Date: 2/22/2011 Page I of25 AU analyses applkablc to the CWA, SDWA, and ReRA arc performed in accordance to NELAC protocols. Pertinent sampling information is located on the attached cac. 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. tbe re-publication of this report for any purpose othertban 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 ofsciencc. A AMERICAN Client: 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 Project: Lab Set 10: Date Received: Lab Sample 10 1102272-001A 1102272-002A l102272-003A 1102272-004A l102272-005A 1102272-006A l102272-007A SAMPLE SUMMARY Denison Mines 1st Quarter Ground Water 2011 1102272 2/18/2011 0930h Client Sample 10 Date Collected MW-20 2116/2011 1045h MW-26 211612011 1226h MW-34 2/16/2011 0830h MW-35 2115/2011 1240h MW-60 2116/2011 1300h MW-35R 2/14/2011 0820h Trip Blank 2/14/2011 Contact: Jo Ann Tischler Matrix Analysis Aqueous VOA by GC/MS Method 8260C/5030C Aqueous VOA by GCIMS Method 8260C/5030C Aqueous VOA by GCIMS Method 8260CI5030C Aqueous VOA by GC/MS Method 8260CI5030C Aqueous VOA by GC/MS Method 8260C/5030C Aqueous VOA by GCIMS Method 8260C/5030C Aqueous VOA by GCIMS Method 8260CI5030C Report Date: 2/22/2011 Page 2 of 25 All analyses applicable to the CWA, SDWA. and RCRA Ilrc perronned in accordance to NELAC protocols. Pertinent sampling information is located on the attached COe. This report is provided for the exclusive use oftbe addressee Privilcgcs of subsequent use of the name of 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 fe-publication oftbis report for any pl.lrflose other than for the addressee will be granted only on contact. Tbis company accepts DO responsibility ex.cept for the due perfonnaoce of inspection andlor analysis in good raith and according to the rules of the trade and ofscience~ 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: 1st Quarter Ground Water 2011 1102272 2/18/2011 2114,2/15,2/16/2011 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 / 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: 2/22/2011 Page 3 of 25 All analyses applicable to tbe CWA, SDWA, and RCRA are performed in accordance to NELAC protocols. Pertinent sampling information is located on tbe attached cac. This report is provided for the exclusive usc of the addressee. Privileges of subsequent use of the name of trus company or any member of its staff, or reproduction of this report in connection wjth the advertisement, promotion or sale of any product or process, or in connection with tbe re-publication oftbis report for any purpose other than fortbe 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 10 the rules of the trade and of science. Client: Denison Mines Lab Set lD: 1102272 Project: 1st Quarter Ground Water 20 11 Sample 10 Analyte Units LCS voe 02 1911A Tetrahydrofuran ).lg/L LCS VOC 02191 1A Surr: 1.2-0ichloroelhane-d4 %REC LCS VCC 02 1911 A Surr: 4-BTomofiuorobenzene %REC LCS VCC 0219 11A SUIT: Dibromonuoromethane %REC LCS VcC 02 1911 A SurT: Toluene-d8 %REC QC SUlVIMARY REPORT Amount Method Result Spiked SW8260e 11.9 20.00 SW8260e 53.1 50.00 SW8260C 49.3 50.00 SW8260C 51.2 50.00 SW8260C 49.4 50.00 Contact: Dept: QCType: Original Jo Ann Tischler MSVOA LCS Amount %REC Limits 0 64.4 43-146 106 69-1 32 98.7 85-118 102 80-1 20 98.9 81-120 RPD %RPI) Limit Qual Date Analyzed 211912011 1241b 2/1912011 1241h 2/19/2011 1241 h 2/1912011 1241h 2/1912011 1241h Report Dale: 2J22j20 I I Page II of25 Client: Deniso n Mi nes Lab Set 10: (102272 Project: 1 st Quarter Ground Water 20 II Sample ID Analyte Units MB VOC02191 1A Telrahydrofuran )lg/L MB VOC 021911A Surr: 1.2-Dichloroethane-d4 %REC MB VOC 021911A Surr: 4-BromO'f1uorobenzenc %REC MB VOC 02191 1A Surr. Dibromotluoromethune %REC MB voe 021911 A Surr: To luene-d8 %REC C SUMMARY REPORT Amount Method Result Spiked SW8260C < 1.00 SW8260C 52.8 50.00 SW8260C 51.7 50.00 SW8260e 49.6 50.00 SW8260e 49.4 50.00 Contact: Dept: QC Type: Original Jo Ann Tischler MSVOA MBLK Amount %REC Limits 106 69-1 32 103 85-118 99.3 80-(20 98.8 81 -120 RPD %RPD Limit Qual Date Analy.zed 2/1912011 131911 2/19/2011 131911 2119120 II 13 19h 2119120 11 1319h 2119/20 11 131911 Report Dale: 212212011 Page 12 of25 Client: Denison Mines Lab Set In: 1102272 Project: 1 st Quarter Ground Water 20 1 J Sample 10 Analyre Units 1 1 02272-00JAMS Tetrahydrofuran J.lgfL 1 1 02272-00JAMS Surr: 1.2-Dichloroclhane-d4 %REC 1102272-00 IAM S Surr: 4-Bromol111orobenzene %REC II02272-001AMS Surr: Dibromonuoromcthane %REC I 1 02272·001 AMS Surr: Toluene-dB %REC QC SUMMARY REPORT Amount Method Result Spiked SW8260C 13.5 20.00 SW8260C 55.0 50.00 SW8260C 48.8 50.00 SW8260C 52.0 50.00 SW8260C 48.2 50.00 Contact: Dept: QCType: O"iginal Jo Ann Tischler MSVOA MS Amount O/OREC Limits 0 67.6 43-146 110 77-1 44 97.5 80-123 104 80-124 96.5 80·125 RPD %RPD Limit Qual Date Analyzed 21191201 1 143511 21191201 1 1435h 21 L9/20 11 L435h 21 1912011 1435h 2/19120 11 1435h Repon Date. 21'..21201 1 Page 1) of25 Client: Denison Mines Lab Set 10: 11 02272 Project: 1 st Quarter Ground Water 20 II Sample 10 Analytc Units 1102272-001 A1\1SD Tetrahydrofuran IlglL 1102272-00IAMSD Surr: 1,2-Dichloroethane-d4 %REC 1 1 02272-00 IAMSD Surr: 4-Bromofluorobenzene %REC [ 102272-00IAMSD Sun: Dibromonooromel'hanc %REC 11 02272-00IAMSD Sun: Toluene-d8 %REC C SUMMARY REPORT Amount Method Result. Spiked SW8260C 12.8 20.00 SWS260C 54.4 50.00 SW8260C 48.S 50.00 SW8260C 51.6 50.00 SW8260C 48.4 50.00 Contact: Dept: QCType: Original Jo Ann Tischler MSVOA MSD Amount %REC Limits 0 64.0 43-146 109 77-144 97.5 80-123 [03 80-124 96.8 SO-125 RPD %RPD Limit Qual Date Analyzed 5.47 25 2119/201 1 1454h 2/191201 1 145411 2119/201 1 1454h 2119/2011 [454h 2/1912011 1454h Report Date: V22I201 1 Page 14 of25 Data Path Data File Acq On Operator Sample Mise ALS Vi<J,l Quantitation Report C:\msdchem\1\DATA\FEBII-C\19FEBlIA\ A74L272l.D 19 Feb 2011 1 :38 pm ll02272-001A SAMP 5 .0ML lO~3 6 Sample Multiplier : 1 QU<J,nt Time: Feb 19 15 :19 :09 2011 Quant Method C :\MSDCHEM\I\METHODS\A~ULLW_29 .M Quant Title VOA Calibration QLast Update Wed Feb 16 13 :58 :28 2011 Response via Initial Calibration (QT Rev iewed) r. bundal'lC9 1900000 TIC: A74l2721.0\dala.ms 180000 0 0 J 0 I " ~ • I 0 t 0 !l , • 170000 160000 150000 140000 , • 1300000 120000 0 I 0 0 " • 110000 1000000 900000 800000 • , i 0 I 0 ! , 700000 60000 saooo a a 40000 0 30000 0 20000 0 10000 0 0 ime--> 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 '.00 6.50 7.00 7.50 8.00 AFULLW_29 .M Sat ~eb 19 15:24 :17 2011 '.50 9.00 9.50 10.00 1 0~1 1.00 11 2Q.. Page : 4 Report Dale: 2/2212011 Page 15 of25 Data Path Data File Acq On Operator Sampl e Mise ALS Vial Quantitation Report C:\msdchem\1\DATA\FEBI1-C\19FEBIlA\ A75L2722 .D 19 Feb 2011 1 :57 pm 1l02272-002A SAMP 5 .0ML 10r3 7 Sample Multiplier: 1 Quant Time: Feb 19 15 :19 :48 2011 Quant M.ethod C: \MSDCHEM\l \METHODS\AFULLW_29 . M Quant Title VOA Calibration QLast Update Wed Feb 16 13:58 :28 20~l Response via Initial Calibration (QT Reviewed) bundanc -----riC: AiS"L2722.DlJJa ta.ms e 1.3e,.07 1.259+07 1.2e .. 07 1.15e+07 1.le+07 1.05e,.07 1e,.07 9600000 9000000 8500000 8000000 7500000 7000000 6500000 6000000 5500000 5000000 4500000 iii I ~ Ul ::! 1 ~, ~ .§ 1 .8 j ~ <I.!. e '." J .i! ~ e 0 ~ ~ 1~ ~ u ~ ~ to I=' g 0 ~ !!/. ... g ,,~ e !!I ~~ ID f i ~ ~ .liI '" e q :e "l 1Il 0 ~ 1; ~ '" '" 4000000 3500000 3000000 2500000 2000000 1500000 1000000 f 500000 o h .~ ~ ime-> 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..09 i\FOLLW_29 .M Sat Peb 19 15 :24 :52 2011 MQ 9.mL ~ 9':?.Q.-!~1.Q·?Q 11~0Q. 11~5Q Page: 4 Repon Date: 2n2l2011 Page 16 of25 Data Path Data File Acq On Operator Sample Mise ALS Vial Quantitation Report C;\msdehem\1\DATA\FEBll-C\19FEBllA\ A76L2723.0 19 Feb 2011 2:16 pm 1102272-003A SAM? 5 .0ML lOF3 8 Sample Multiplie.r : 1 Quant Time: Feb 19 15 :20 :23 2011 Quant Method C:\MSDCHEM\1\METHOOS\AFULLW_29 .M Quant Title VOA Calibration QLast Update Wed Feb 16 13:58:28 2011 Response via Initial Calibration (QT Reviewed) rA.:"undanc • TIC; A 76L2723.0'dala.ms 170000 0 1600000 , f • I 0 1500000 130000 0 1 ,j 1200000 I ~ 100000 0 90000 0 80000 0 70000 0 • 0 t I J 0 ,j , • 60000 500000 40000 0 300000 200000 100000 0 A [flme··,. 2.00 2.50 3.00 3.50 4.00 '.50 5.00 5.50 '.00 '.50 7.00 Z·~OO AFULLW_29 .M Sat Feb 19 15 :25 :27 2011 - ~50_ 9.00 9~50 10.00 10.50 11.00 11.50 Page: 4 Report Date: mmOll Page 17 of2S Da t a Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\l\DATA\FEBlI-C\19FEBllA\ 1\79L2724.0 19 Feb 2011 3:13 pm 1102272-004A SAMP 5.0ML 10F3 11 Sample Multiplier: 1 Quant Time: Feb 19 15:41:28 2011 Quant Method C:\MSOCHEM\1\METHOOS\AFULLW_29.M Quant Title VOA Calibration QLast update Wed Feb 16 13:58 :28 2011 Response via Initial Calibration (QT Reviewed) Abundance TIC: A79L2724.D\dala.ms 0 0 I , 150000 "0000 0 • 0 I J 0 , • ; • 0 e '30000 120000 110000 • 0 90000 0 8{)0000 70000 0 0 I • I j 0 , 60000 500000 j - 0 l 40000 300000 200000 >0000 0 A I 0 [rime·-> 2.00 2.50 3.00 3.50 4.00 '.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 850 AFULLW_29.M Sat Feb 19 16:00:47 2011 9.00 9.50 10.00 10.50 11.00 11.5Q. Page : 4 Repon Ollie: 2I22nOll Page 18 of25 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\FEB11-C\19FEB11A\ ABOL2725.D 19 Feb 2011 3:32 pm 1l02272-005A SAMP 5.0ML lOF3 12 Sample Multiplier: 1 Feb 19 16:00:24 2011 C:\MSDCHEM\1\METHODS\AFULLW_29.M VOA Calibration Wed Feb 16 13:58:28 2011 Initial Calibration -- (QT Reviewed) 1Abundanc e TIC: ABOL2725.Dldata.ms I 1700000 on " !! 1600000 i!l 5i .c e ~ u 0 1 ... !!l CJ) ~ ~ " t! 11 I " e .c t e g ~ e g III 1500000 1400000 1300000 ~ CJ) 1200000 ~ ~ CI> .c ~ 1100000 u:: 0 ... I 1000000 !!l BOOOOO 700000 en ~ i en ! ~ CI> e ~ ~ e 0 ,Q ~ 0 600000 500000 ~ ~ en en 400000 300000 200000 100000 A 2.00 2.50 3.00 3.50 4.00 4.5L§Jl0 5.50 6.00 6.50 7.00 7.50 B.OO I mme-> o AFULLW_29.M Sat Feb 19 16:01:20 2011 A B.50 9.00 9.50 10.00 10·~L 11.Q9......!.!:..~ Page: 4 Report Date: 2/22/2011 Page 19 of 25 Data Path Data File .... cq On Operat or Sample Mise .... LS Vial Quantitation Report C:\msdchem\1\O .... TA\FEBII-C\19rEB11 .... \ A.81L2726.0 19 Feb 2011 3 :51 pm 1102272-006 .... SAMP 5 .0ML lor3 13 Sample Multiplier: 1 Quant Time: Feb 19 16:04 :13 2011 Quant Method C:\MSDCHEM\1\METHODS\AFULLW-2 9 .M Quant Title VOA Calibration QLast Update Wed Feb 16 13 :58 :28 2011 Response via Initial Calibration (QT Reviewed) r. urrdan " TIC: A81l2726.0\dalQ,ms 170000 0 0 I 0 I ~ I ~ 160000 150000 1400000 130000 0 j l 120000 0 , j 110000 0 ~ ~ '00000 0 90000 0 80000 0 70000 0 0 ! • I i 3 0 t ! ~ 0 , • , 60000 50000 40000 0 • 30000 0 '0000 0 10000 0 • , I 0 iTime-> '0<> 2,50 3.00 3.50 400 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 8.50 AFULLW_29 .M Sat reb 19 16 :04:31 2011 9.00_9.~ 10.00 10,SO 11.00 11.~ Page: 1\ Rcpon Dale: 212212011 Page 20 ofH Data Path Data File A.cq On Operator Sample Mise ALS Vial Quantitation Report C:\msdchem\1\DATA\FEBII-C\19FEBI1A\ AS2L2727 .D 19 Feb 2011 4 :10 pm 1l02272-007A SAMP 5 .0ML lOF3 14 Sample Mult iplier : 1 Quant Time : Feb 19 16 :31:24 2011 Quant Method C:\MSDCHEM\I\METHODS\AFULLW_29 .M Quant Title VOA Calibration QLast Update Wed Feb 16 13:58 :28 2011 Response via Ini t ial Calibration (QT Reviewed) '"Siiidance TIC: A82L2727.Dldala.ms----- 1600000 0 I 0 t • 0 I 150000 140000 130000 i 120000 0 Ai • , ! • 0 t ~ 110000 0 I; 100000 0 90000 0 80000 0 70000 0 • 0 t • ! 60000 i i ,! 0 :'< 0 .! , • 500000 "000 30000 0 20000 0 10000 0 II 0 ime-> 2.00 2.50 3.00 3.50 4.00 '.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 8.50 AFULLW_29 .M Sat Feb 19 16 :31 :39 2011 9.00 9.50 10.00 10.50 1 1.00_11~ Page: <I Report Date: 212212011 Page 21 of2S Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via r. undance 3200000 2400000 2200000 2000000 1800000 1600000 1400000 1200000 1000000 Quantitation Report C:\msdehem\1\DATA\FEB11-C\19FEB11A\ A 71LCS20. D 19 Feb 2011 12:41 pm LCS VOC 021911A LCS SEE COVERSHEET FOR ID AND AMOUNTS 3 Sample Multiplier: 1 Feb 19 12:53:48 2011 C:\MSDCHEM\1\METHODS\AFULLW_29.M VOA Calibration Wed Feb 16 13:58:28 2011 Initial Calibration (Not Reviewed) TIC: A71 LCS20.D\data.ms E I I" " " " N " t~ It II. AFULLW_29.M Sat Feb 19 15:21:48 2011 Page: 4 Report Date: 2/22/2011 Page 22 of 25 Quantitation Report Data Path Data file Acq On Op erator Sampl e Mise C:\msdchem\1\DATA\FEB11-C\19FEB11A\ A73LMBLK.D 19 Feb 2011 1:19 pm MB VOC 021911A MBLK 5.0ML ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via 5 Sample Multiplier: 1 Feb 19 15:18:42 2011 C:\MSDCHEM\1\METHODS\AFULLW_29.M VOA Calibration Wed Feb 16 13:58:28 2011 Initial Calibration (QT Reviewed) e rbundanc 1800000 --TIC: A73LMBLK.D\data.ms 1700000 ~ 1 " ~ "' ... '" ~ 1600000 .r. en 1500000 ,; " III " " .D E! Q 1400000 ~ ,; !! " III is 1i iii en .D 1300000 E! Q " Ii: 1200000 c t-!!1 1100000 1000000 SOOOOO 800000 700000 en ,; ~ en ~ E .. E .t:: 0; ~ E! .ll ~ ~ E! c ,Q N. c 600000 500000 1i 5 en en 400000 300000 200000 100000 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50_6.00 6.50 7.00~0 8.00 AFULLW_29.M Sat Feb 19 15:22:22 2011 - I 8.50 9:00 S.50 1 ().OQ ! Q,59-.J.1.,0.0 11 ~~ Page: 4 Report Date: 2/22/2011 Page 23 of 25 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\FEBll-C\19FEBllA\ A77S2721.D 19 Feb 2011 2:35 pm 1l02272-001AMS MS 5.0ML 20F3 9 Sample Multiplier: 1 Feb 19 14:47:41 2011 C:\MSDCHEM\1\METHODS\AFULLW_29.M VOA Calibration Wed Feb 16 13:58:28 2011 Initial Calibration (Not Reviewed) TIC: A77S2721.D\data.ms '" '" v ~ II! ~ !! Ii " .i CJ) t ~ ~ "II iii ~ ~ E if Cl f-!!l ~I ... ime--> AFULLW_29.M Sat Feb 19 15:22:56 2011 Page: 4 Report Date: 2/22/2011 Page 24 of 25 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\FEB11-C\19FEB11A\ A78D2721.D 19 Feb 2011 2:54 pm 1l02272-001AMSD MSD 5.0ML 30F3 10 Sample Multiplier: 1 Feb 19 15:06:44 2011 C:\MSDCHEM\1\METHODS\AFULLW_29.M VOA Calibration Wed Feb 16 13:58:28 2011 Initial Calibration (Not Reviewed) TIC: A7BD2721.D\data.ms E AFULLW_29.M Sat Feb 19 15:23:31 2011 Page: 4 Report Date: 2/22/2011 Page 25 of 25 American West Analytical Laboratories WORK ORDER Summary Client: Client ID: Denison Mines DENIOO Contact: .To Am Tischler Work Order: 1102272 Page 1 of 1 2/18/2011 Project: 1st Quatter Ground Water 2011 QC Level: LEVEL III WO Type: Project Comments: No Hard Copies (UL). QC 3 & Summaty EDD-CSV. RepOit THFto 1 J.1o .; ________________________ ~~~~~----------------------~B Sample ID Client Sample ID Collected Date Received Date Date Due Matrix Test Code Sel Storage I I 02272-00 IA MW-20 2/1612011 10:45:00 AM 2/18/20119:30:00 AM 3/4/2011 Aqueous 8260-W ~ VOCFridge 3 1102272-002A MW-26 2116/2011 12:26:00 PM 3/4/2011 8260-W ~ VOCFridge 1102272-003A MW-34 2/16/2011 8:30:00 AM 3/4/2011 8260-W ~ VOCFridge 1102272-004A MW-35 2/15/2011 12:40:00 PM 3/412011 8260-W ~ VOCFridge 1102272-005A MW-60 2/16/2011 1:00:00 PM 3/412011 8260-W ~ VOCFridge 1l02272-006A MW-35R 2114/2011 8:20:00 AM 3/4/2011 8260-W ~ VOCFridge 1l02272-007A Trip Blank 2/1412011 3/4/2011 8260-W ~ VOCFridge _____ 0 ~ I Sheet 1 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 . t rOJec S amplers N ame S amf:llers S· Ignature 1 st Quarter Ground ~~~ Water 2011 Tanner Holliday Date Time Sample 10 Col/ected Collected Laboratory Analysis Requested MW20 2/16/2011 1045 THF MW26 2116/2011 1226 THF MW34 2/16/2011 830 THF MWB5 2/15/2011 1240 THF MWBO 2/16/2011 1300 THF MW35R 2/14/2011 820 THF Trip Blank 2/14/2011 / ./ Please notify Ryan Palmer of Reciept tempature on these samples Immediatelyl Thank you. / Relinquished By:(Signature) Dateffime v: (Signa'ureJ Datemme ~~k/~ 2/17/2011 1300 Relinquished By:(Signature) 7 Received By:(Signature) Danm~e ~OAl\.t~Q.. &"'-~ ') "2 Ii 1\ f\A ., '. ~a ./ Lab Set ID : \ \ 0 ~2-"2/2- SaIJl'Ples Were: COC Tape Was: Container. Type: ~hippedBy: tl\-"S Present on Outer Package o A W AL Supplied Plastic o Hand Delivered ~s DNa DN/A o A W AL Supplied Clear Glass ./ o Ambient unbzn on Outer package o A WAL Supplied Amber Glass / ~hilled [] es DNo DN/A . Temperature '"?). ~ DC Presen~mple o A WAL Supplied VOAffO:1s o Amber 0 Clear 0 Headspa No Headspace Rec. Broken/Leaking DYes rt"No DN/A DYes 0 DN/A o Non A W AL Suppliedj26iitainer Notes: Properly Preserved Notes: Rec. Within Hold Notes: Bottle Type Ammonia COD Cyanide Metals N02 &N03 Nutrients O&G Phenols Sulfide TKN TOC TP04 TPH '---Procedure. 1) 2) 3) 4) 5) .6) 7) / Unbroken on sa% DYes DNo /A rrt"es DNo DN/A Notes: ~Yes DNa . Preservative All pHs OK pH <2 H2SO4 pH <2 H2S04 PH >12 NaOH . pH <2 HN03 pH <2 H2SO4 . pH <2 H2SO4 pH<2HCL pH <2 H2SO4 pH> 9NaOH, ZnAC pH <2 H2SO4 / pH <2 H3P04 / 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 7" 7 ./ ./ / Discrepancies Between Labels and COC Notes: tJ) / / /' / ;7 /' /'" If sample is not preserved properly list its extension and receiving pH in the appropriate column above Flag coe and notify client for further instructions Place client conversation on cac Samples may be adjusted at client request ~ - No. ReV ./ DYes U-N'O EN:RGY ..... H , 1/1', www.energylab.com WIytIaI~Sllrr:.11ISt Helena, MT 877-472-0711 • Billings, MT 100-735-4489 • Casper, WY 888-235-0515 Gilielts, WY 81&-&8&-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-&90-2218 ANAL VTICAL SUMMARY REPORT March 10, 2011 Denison Mines USA Corp 6425 S Hwy 191 Blanding, UT 84511 Workorder No.: C11020163 Quote ID: C1640 -POC Wells Project Name: 1 st Quarter Groundwater Energy Laboratories, Inc. Casper WY received the following 6 samples for Denison Mines USA Corp on 2/4/2011 for analysis. Sample 10 Client Sample 10 Collect Date Receive Date Matrix Test C11020163-001 MW-11 02/02/11 12 :50 02/04/11 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 C11020163-002 MW-25 02/02/11 13 : 10 02/04/11 Aqueous Same As Above C11020163-003 MW-30 02/01/11 12 :40 02104/11 Aqueous Same As Above C11020163-004 MW-31 02/01/11 14 :35 02/04/11 Aqueous Same As Above C11020163-005 Trip Blank 5521 02/02/11 00 :00 02/04/11 Aqueous SW8260B VOCs , Standard List C11020163-006 Temp Blank 02/02/11 00 :00 02/04/11 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: 1l~ ~ YVI!'tL- Report Proofing Specialist Digitally signed by Kathy Hamre Date: 2011.03.10 12:41 :51 -07:00 Page 1 of 28 .,,/ www.energylab.com WJrtJuI tzuJIacI SiB. 1151 Helena, MT 877-472-0711 • Billings, MT 800·735·4489 • Casper, WY 888-235·0515 Gillette WY 888·688·7115 • Ra Id C SD 888·872·1225 • CoUe e Station TX 888·690·221 B CLIENT: Denison Mines USA Corp Project: 1 st Quarter Groundwater Report Date: 03/10/11 Sample Delivery Group: C11020163 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. 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 28 EN:RGY )\ \. ~ I I, • I ,.,1; • www.energyteb.com AMIftIaI~"'1U Haiena, MT 877-412-0711 • Billings, MT BGO·135·4489 • Casper, WY 888-235·0515 Gillette, WY 8&&·18&·1115 • Rapid City, SD 188·&72·1225 • College Station, 1X 888-69D·2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter 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: Cll020163·002AOUP Alkalinity, Total as CaC03 Sample 10: Cll020163·002AMS Alkalinity, Total as CaC03 Qualifiers: RL -Analyte reporting limit. 3 Method Blank NO mg/L NO mg/L NO mg/L Laboratory Control Sample 209 mg/L Sample Duplicate 332 mg/L Sample Matrix Spike 467 mg/L MDC -Minimum detectable concentration Report Date: 03/10/11 Work Order: C11020163 RL %REC Low limit High Limit 1 1 5.0 5.0 5.0 105 108 Run: MANTECH_ll 0207B Run: MANTECH_11 02078 90 110 Run: MANTECH_ll0207B Run: MANTECH_ll 0207B 80 120 NO -Not detected at the reporting limit. RPO RPOLimit Qual 0.2 Batch: R142527 02/07/11 16:01 02/07/11 16:17 02/07/11 17:07 10 02/07/11 17:15 Page 13 of 28 EN:RGY ,'\1 ,,,,.,Il..lj-tl.·, www.energylab.com MI/fIIQf UufIftct SIwu 1m Helena, MT 877-412-0711 • Billings, MT 800-135-4489 • Casper, WY 888-235-0515 Gillette, WY 886-188-1175 • Rapid City, SD 888-672-1225 • College Station, TX 888-690-2219 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater Analyte Count Result Units Method: A2540 C Sample 10: MBLKC Solids, Total Dissolved TDS @ 180 C Method Blank ND mg/L Sample 10: LCS1_ Laboratory Control Sample Solids, Total Dissolved TDS @ 180 C 985 mg/L Sample 10: C11020164-002AOUP Sample Duplicate Solids, Total Dissolved TDS@ 180 C 2410 mg/L Sample 10: C11020164·004AMS Sample Matrix Spike Solids, Total Dissolved TDS @ 180 C 3450 mg/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Report Date: 03/10/11 Work Order: C11020163 RL %REC Low Limit High Limit Run: BAL-1_110204A 10 Run: BAL-1_110204A 10 98 90 110 Run: BAL-1 110204A - 10 Run: BAL-1_110204A 10 101 90 110 ND -Not detected at the reporting limit. RPO RPOLimit Qual 0.1 Batch: R142563 02/04/11 15:31 02/04/11 15:31 02/04/11 15:37 10 02/04/11 15:37 Page 14 of 28 EI\ERGY ,. .' JI .;,/ ,II (,' ., www.energylab.com AMI/fJt:M~SIIu 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 888-888-7175 • Rapid City, SD 888-612-1225 • College Station, TX 888-690-2218 Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater QA/QC Summary Report Prepared by Casper, WY Branch Report Date: 03/10/11 Work Order: C11020163 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: A450D-CI B Sample 10: MBLK9-11D215 Chloride Sample 10: C11020163-D04A Chloride Sample 10: C11020163-D04A Chloride Sample 10: LCS35-11D215 Chloride Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mg/L Sample Matrix Spike 320 mg/L Sample Matrix Spike Duplicate 325 mg/L Laboratory Control Sample 3550 mg/L Batch: 11 0215-CL-TTR-W Run: TITRATION_110215A 02/15/1115:08 0.5 Run: TITRATION_110215A 02/15/11 15:41 1.0 99 90 110 Run: TITRATION_110215A 02/15/11 15 :43 1.0 102 90 110 1.6 10 Run: TITRATION_110215A 02/15/11 16:31 1.0 100 90 110 ND -Not detected at the reporting limit. Page 15 of 28 EI\ERGY www.energylab.com Helena, MT 877-472-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 Gillette, WY 888-888-7175 • Rapid City, so 888-&72-1225 • Collega Station, lX 888-690-2218 .~,. '1,/, I ~)' ill •• ItiII/fIIr:.i builHr.I SItrc, 1m QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater Analyte Count Result Units Method: A4500-F C Sample 10: MBLK Fluoride Sample 10: LCS Fluoride Sample 10: MB-28918 Fluoride Sample 10: C11020163-004AMS Fluoride Sample 10: C11020163-004AMSO Fluoride Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank 0.02 mg/L Laboratory Control Sample 1.00 mg/L Method Blank 0.02 mg/L Sample Matrix Spike 1.78 mg/L Sample Matrix Spike Duplicate 1.82 mg/L Report Date: Work Order: RL %REC Low Limit High Limit RPO Run: MANTECH_11 0207A 0.008 Run: MANTECH_110207A 0.10 98 90 110 Run: MANTECH_110207A 0.008 Run: MANTECH_110207A 0.10 95 80 120 Run: MANTECH_110207A 0.10 99 80 120 2.2 ND -Not detected at the reporting limit. 03/10/11 C11020163 RPOLimit Qual Batch: R142514 02/07/11 11 :57 02/07/11 12:00 02/07/11 12:06 02/07/11 13 :38 02/07/11 13:40 10 Page 16 of 28 www.energylab.com EN:RGY •• ~' .~J! :\r':f~" ., AIuIytJt:M Exa/IItIa SIIrcI1W Helena, MT 877·472-0711 • BIllings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillatte, WY 88&-888-7175 . Rapid City, so 888-672-1225 . Collega Station, TX 888-680-2218 Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater QA/QC Summary Report Prepared by Casper, WY Branch Report Date: 03/10/11 Work Order: C11020163 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: A4500-H B Sample 10: ICVC110204_1 pH Method: A4500-H B Sample 10: C11020163-001AOUP pH Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Initial Calibration Verification Standard 6.90 S.u. 0.010 101 Sample Duplicate 7.83 S.u. 0.010 98 Analytical Run: ORION555A-2_110204A 02/04/11 14:51 102 Run: ORION555A-2_11 0204A 02/04/11 15 :32 3 0.4 ND -Not detected at the reporting limit. Page 17 of 28 EI\ERGY /,~ 'J./ .. , ~I~II ., Client: Denison Mines USA Corp ProJect: 1 st Quarter Groundwater Kelena, MT 877·472·0711 • Billings, MT 800·735·«89 . Casper, WY 888·235·0515 Gillette, WY 866-686-7175 . Rapid City, SD 888-672-1225 . College Slatlon, TX 888-680-2218 QA/QC Summary Report Prepared by Casper, WY Branch Report Date: 03/10/11 Work Order: C11020163 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: A4500·NH3 G Sample 10: MBLK·6 Nitrogen, Ammonia as N Sample 10: LCS·7 Nitrogen, Ammonia as N Sample 10: C11020163-Q020MS Nitrogen, Ammonia as N Sample 10~ C11020163·0020MSO Nitrogen, Ammonia as N Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mglL Laboratory Control Sample 1.92 mg/L Sample Matrix Spike 2.53 mg/L Sample Matrix Spike Duplicate 2.55 mg/L Batch: R14271 0 Run: TECHNICON_11 0211 A 02111/11 11 :40 0.02 Run: TECHNICON_110211A 02111 III 11 :42 0.050 96 90 110 Run: TECHNICON_11 0211A 02111/11 11 :53 0.050 102 80 120 Run: TECHNICON_11 0211 A 02111/11 11 :56 0.050 103 80 120 0.8 10 ND -Not detected at the reporting limit. Page 18 of 28 EN:RGY www.energylab.com Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 888-188-7175 • Rapid City, SD 118-672-1225 • College Station, TX 888-680-2218 ."\, ,i l', .• \11 tl; '-' AM/yIJa/ EB"-SIIu 1m QA/Qe Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater Analyte Count Result Units Method: A4500-S04 E Sample 10: LCS-1_110210 Sulfate Sample 10: MBLK-1_110210 Sulfate Sample 10: C11010659-010AOUP Sulfate Sample 10: C11020163-004AMS Sulfate Sample 10: C11020163-004AMSO Sulfate Qualifiers: RL -Analyte reporting limit. MDe -Minimum detectable concentration Laboratory Control Sample 5010 mg/L Method Blank ND mg/L Sample Duplicate 120 mg/L Sample Matrix Spike 1030 mg/L Sample Matrix Spike Duplicate 1020 mg/L Report Date: 03/10/11 Work Order: C 11020163 RL %REC Low Limit High Limit Run: TURB-2_11 021 OA 100 104 90 110 Run: TURB-2_110210A 0.8 Run: TURB-2_110210A 2.0 Run: TURB-2_110210A 25 102 90 110 Run: TURB-2_11 021 OA 25 101 90 110 ND -Not detected at the reporting limit. RPO RPOLimit Qual Batch: 11021 0_C S04-TURB-W 02/10/11 11 :07 1.4 0.5 02/10/11 11: 1 0 02/10/11 11 :26 10 02/10/11 12:00 02/10/11 12:02 10 Page 19 of 28 EI\ERGY ."\ , 1I ~. I I ;" II ~~ www.energylab.com AMIyfkM EII:IlIIKI SIIrt:I 1m Halena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 88B-888-7175 • Rapid City, SD 888-&72-1225 . College Station, lX 888-680-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1st Quarter Groundwater Analyte Count Result Units Method: E200.7 Sample 10: MB-110215A 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-110215A 5 Laboratory Fortified Blank Calcium 48.3 mg/L Iron 0.972 mg/L Magnesium 50.2 mg/L Potassium 43.7 mg/L Sodium 46.5 mg/L Sample 10: C11020156-003BMS2 5 Sample Matrix Spike Calcium 104 mg/L Iron 1.98 mg/L Magnesium 97.9 mg/L Potassium 95.2 mg/L Sodium 560 mg/L Sample 10: C11020156-003BMSO 4 Sample Matrix Spike Duplicate Calcium 103 mg/L Magnesium 98.0 mg/L Potassium 93.4 mg/L Sodium 554 mg/L Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. Report Date: 03/10/11 Work Order: C11020163 RL %REC Low Limit High Limit RPO RPOLimit Qual Batch: R142791 Run: ICP2-C_11 0215A 02/15/11 12:54 0.2 0.002 0.05 0.02 0.3 Run: ICP2-C_11 0215A 02/15/11 12 :58 0.50 97 85 115 0.030 97 85 115 0.50 100 85 115 0.50 87 85 115 0.50 93 85 115 Run: ICP2-C_110215A 02/15/11 15:04 1.0 95 70 130 0.030 94 70 130 1.0 95 70 130 1.0 92 70 130 1.0 70 130 A Run: ICP2-C_11 0215A 02/15/11 15:08 1.0 94 70 130 1.0 20 1.0 95 70 130 0.1 20 1.0 90 70 130 1.9 20 1.0 70 130 0.9 20 A 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 20 of 28 EN:RGY • H("I HI • www.energylab.com ANITtiUI~~ IW Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 866-186-7175 • Rapid City, SD BBB-Bl2-1225 • College Station, TX BBB-680-221 B QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater Analyte Method: E200.8 Sample 10: Cll020163-001BMS4 Arsenic Beryllium Cadmium Chromium Cobalt Copper Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc Sample 10: Cl1020163-001BMSO 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 0.0529 mg/L 0.0401 mg/L 0.0443 mg/L 0.0510 mg/L 0.0507 mg/L 0.0481 mg/L 0.0504 mg/L 0.194 mg/L 0.00517 mg/L 0.0483 mg/L 0.0496 mg/L 0.0507 mg/L 0.0164 mg/L 0.0485 mg/L 0.0303 mg/L 0.0511 0.0520 0.0458 mg/L mg/L mg/L 18 Sample Matrix Spike Duplicate 0.0559 mg/L 0.0428 mg/L 0.0476 mg/L 0.0546 0.0546 0.0512 0.0547 0.200 0.00555 0.0548 0.0526 0.0540 0.0188 0.0531 0.0371 0.0554 0.0558 0.0487 18 Method Blank NO NO NO NO 0.0003 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 MOC -Minimum detectable concentration Report Date: 03/10/11 Work Order: C 11020163 RL %REC Low Limit High Limit 0.0010 0.010 0.010 0.050 0.010 0.010 0.050 0.010 0.0010 0.0010 0.0010 0.0010 0.010 0.0010 0.0010 0.00030 0.0010 0.010 0.0010 0.010 0.010 0.050 0.010 0.010 0.050 0.010 0.0010 0.0010 0.0010 0.0010 0.010 0.0010 0.0010 0.00030 0.0010 0.010 4E-05 3E-05 7E-05 5E-05 lE-05 105 80 89 102 100 96 101 98 103 94 98 99 82 97 61 101 104 90 111 86 95 109 108 102 109 109 111 107 104 106 94 106 74 110 111 96 Run: ICPMS4-C_l1 0207 A 70 130 70 130 70 130 70 130 70 130 70 130 70 70 70 70 70 70 70 70 70 70 70 70 130 130 130 130 130 130 130 130 130 130 130 130 Run: ICPMS4-C_l1 0207 A 70 130 70 130 70 130 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 Run: ICPMS4-C_ll 0207 A NO -Not detected at the reporting limit. S -Spike recovery outside of advisory limits. RPO RPDLlmit Qual 5.6 6.4 7.4 6.8 7.4 6.3 8.3 2.7 7.1 13 5.9 6.3 14 9.1 20 8.1 7.0 6.3 Batch: R142549A 02108/11 06:43 S 02/08/11 06:50 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 02/07/11 18:41 Page 21 of 28 EN:RGY ,,,\' I."II-l ( •• www.energylab.com AM/f*II ElwIIwl:ISItru /151 Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 86&-188-7175 . Rapid City, SD 888-&72-1225 . ColiegeStation, TX 888-680-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 03/10/11 Project: 1 st Quarter Groundwater Work Order: C11020163 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: E200.8 Batch: R142549A Sample 10: LRB 18 Method Blank Run: ICPMS4-C_l10207A 02/07/11 18:41 Copper 8E-05 mg/L BE-05 Lead 5E-05 mg/L 2E-05 Manganese 0.0001 mg/L 2E-05 Mercury 4E-05 mg/L 2E-05 Molybdenum 0.0003 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 0.0008 mg/L 0.0002 Uranium 2E-05 mg/l 8E-OB Vanadium NO mg/L l E-05 Zinc 0.003 mg/L 0.0001 Sample 10: LFB 18 Laboratory Fortified Blank Run: ICPMS4-C_ll 0207A 02/07/11 18:48 Arsenic 0.0513 mg/L 0.0010 103 85 115 Beryllium 0.0517 mg/L 0.0010 103 85 115 Cadmium 0.0530 mg/L 0.0010 lOB 85 115 Chromium 0.0534 mg/L 0.0010 107 85 115 Cobalt 0.0522 mg/L 0.0010 104 85 115 Copper 0.0547 mg/L 0.0010 109 85 115 lead 0.0518 mg/l 0.0010 104 85 115 Manganese 0.0510 mg/L 0.0010 102 85 115 Mercury 0.00529 mglL 0.0010 105 85 115 Molybdenum 0.0530 mg/L 0.0010 lOB 85 115 Nickel 0.0540 mg/L 0.0010 108 85 115 Selenium 0.0524 mg/L 0.0010 105 85 115 Silver 0.021B mg/L 0.0010 108 85 115 Thallium 0.0513 mg/L 0.0010 103 85 115 Tin 0.0513 mg/L 0.0010 101 85 115 Uranium 0.0502 mg/L 0.00030 100 85 115 Vanadium 0.0528 mg/L 0.0010 lOB 85 115 Zinc 0.0558 mg/l 0.0010 105 85 115 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MOC -Minimum detectable concentration Page 22 of 28 EI\ERGY ,~ . I ~ ,', I ! J I ~ • Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater Halana, MT 877-472-0711 • Billings, MT 800-735-4489 . Casper, WY 881-235-0515 Gillette, WY 88B-I88-7175 • Rapid City, SD 188-872-1225 • College Siallon, TX 881-680-2218 QAlQC Summary Report Prepared by Casper, WY Branch Report Date: 03/10/11 Work Order: C11020163 Analyte Count Result Units RL %REC Low Limit High LImit RPO RPOLimlt Qual Method: E353.2 Sample 10: MBLK-1 Nitrogen, Nitrate+Nitrite as N Sample 10: LCS-2 Nitrogen, Nitrale+Nitrite as N Sample 10: C11020163-D020MS Nitrogen, Nitrate+Nitrite as N Sample 10: C11020163-0020MSO Nitrogen, Nitrate+Nitrite as N Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank 0.07 mg/L Laboratory Control Sample 2.47 mg/L Sample Matrix Spike 2.22 mg/L Sample Matrix Spike Duplicate 2.09 mg/L Batch: R142502 Run: TECHNICON_110204A 02/04/11 13:59 0.06 Run: TECHNICON_11 0204A 02/04/11 14:01 0.10 96 90 110 Run: TECHNICON_11 0204A 02/04/11 16:51 0.10 107 90 110 Run: TECHNICON_11 0204A 02/04/11 16:54 0.10 100 90 110 6.0 10 NO -Not detected at the reporting limit. Page 23 of 28 EN:RGY ,., ",' .1' Ill' www.energylab.com AIlII1fkMExu/lnaSlltc.,1S1 Helena, MT 877-472-0711 • Billings, PIT 800-735-4489 . Casper, WY 888-235-0515 Gillette, WY 88&·188·7175 • Rapid Ctty, SD 888-&72-1225 • ColiegB Station, IX 888-610-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater Analyte Method: E900.1 Sample 10: MB-GA-0402 Gross Alpha minus Rn & U Count Result 3 Method Blank -0.03 Gross Alpha minus Rn & U Precision (±) 0.05 Gross Alpha minus Rn & U MDC 0.09 Units pCilL pCi/L pCilL Sample 10: LCS-GA-0402 Gross Alpha minus Rn & U Laboratory Control Sample Sample 10: TAP WATERMS Gross Alpha minus Rn & U Sample 10: TAP WATERMSO Gross Alpha minus Rn & U Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration 10.4 pCi/L Sample Matrix Spike 10.4 pCi/L Sample Matrix Spike Duplicate 10.4 pCi/L Report Date: 03/10/11 Work Order: C11020163 RL %REC Low Limit High Limit Run: G5000W_110301 B Run: G5000W_110301B 99 70 130 Run: G5000W_110301 B 97 70 130 Run: G5000W_11 0301 B 97 70 130 NO -Not detected at the reporting limit. RPO RPOLImit Qual 0.2 Batch: GA-0402 03/08/11 18:09 U 03/08/11 18:09 03108/11 18:09 03/08/11 18 :09 16.4 U -Not detected at minimum detectable concentration Page 24 of 28 EN:RGY .. I 'i I I I {I, ~ www.energylab.com AIuIytJm~ SIRu 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 8&6-&8&-7175 • Rapid City, so 888-&72-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater Analyte Count Method: SW8260B Result Units Sample 10: 02091 CLCS_ 4 16 Laboratory Control Sample Acetone 110 ug/L Benzene 12 ug/L Carbon tetrachloride 11 ug/L Chloroform 12 ug/L Chloromethane 10 ug/L m+p-Xylenes 21 ug/L Methyl ethyl ketone 130 ug/L Methylene chloride 9.8 ug/L Naphthalene 11 ug/L o-Xylene 11 ug/L Toluene 11 ug/L Xylenes, Total 32 ug/L Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Sample 10: 020911_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-Bromofluorobenzene Surr: Toluene-d8 Sample 10: C11020163-004EMS 16 Sample Matrix Spike Acetone 1200 ug/L Benzene 120 ug/L Carbon tetrachloride 110 ug/L Chloroform 110 ug/L Chloromethane 110 ug/L m+p-Xylenes 220 ug/L Methyl ethyl ketone 1200 ug/L Methylene chloride 110 ug/L Naphthalene 100 ug/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration RL 20 1.0 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 200 10 10 10 10 10 200 10 10 Report Date: 03/10/11 Work Order: C11020163 %REC Low Limit High Limit RPO RPOLimit Qual Batch: R142634 Run: SATURNCA_110209B 02/09/11 11 :16 114 70 130 116 70 130 108 70 130 117 70 130 104 70 130 107 70 130 127 70 130 98 70 130 107 70 130 105 70 130 112 70 130 107 70 130 100 80 120 106 70 130 111 80 130 104 80 120 Run: SATURNCA_110209B 02/09/11 12:28 102 80 120 122 70 130 107 80 120 101 80 120 Run: SATURNCA_110209B 02/09/11 17:16 118 70 130 116 70 130 110 70 130 114 70 130 114 70 130 108 70 130 119 70 130 109 70 130 100 70 130 ND -Not detected at the reporting limit. Page 25 of 28 EN:RGY .'-. ~ ,) I I • , I ' 'I r • www.energylab.com AIYIyIiuIIxt.u-.•• ,m Helena, MT 877-472-0711 • Billings, MT 800·735·4489 • Casper, WY 888-235·0515 Gillette, WY 888·188·7115 • Rapid City, SD 888·872·1225 • College Station, 1X 888·&80·221 B QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 03/10/11 Project: 1 st Quarter Groundwater Work Order: C11020163 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: SW8260B Batch: R142634 Sample 10: C11020163·004EMS 16 Sample Matrix Spike Run: SATURNCA_110209B 02/09/11 17:16 o-Xylene 110 ug/L 10 108 70 130 Toluene 110 ug/L 10 110 70 130 Xylenes, Total 320 ug/L 10 108 70 130 Surr: 1,2-Dichlorobenzene-d4 1.0 99 80 120 Surr: Dibromofluoromethane 1.0 103 70 130 Surr: p-Bromofluorobenzene 1.0 105 80 120 Surr: Toluene-d8 1.0 105 80 120 Sample 10: C11020163-004EMSO 16 Sample Matrix Spike Duplicate Run: SATURNCA_110209B 02/09/11 17:52 Acetone 1200 ug/L 200 117 70 130 1.0 20 Benzene 120 ug/L 10 115 70 130 0.3 20 Carbon tetrachloride 110 ug/L 10 110 70 130 0.7 20 Chloroform 120 ug/L 10 116 70 130 1.7 20 Chloromethane 110 ug/L 10 109 70 130 5.0 20 m+p-Xylenes 220 ug/L 10 108 70 130 0.0 20 Methyl ethyl ketone 1200 ug/L 200 123 70 130 3.6 20 Methylene chloride 110 ug/L 10 106 70 130 3.0 20 Naphthalene 100 ug/L 10 102 70 130 1.2 20 o-Xylene 100 ug/L 10 104 70 130 3.0 20 Toluene 110 ug/L 10 109 70 130 0.7 20 Xylenes, Total 320 ug/L 10 107 70 130 1.0 20 Surr: 1,2-Dichlorobenzene-d4 1.0 100 80 120 0.0 10 Surr: Dibromofluoromethane 1.0 106 70 130 0.0 10 Surr: p-Bromofluorobenzene 1.0 103 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 Page 26 of 28 EN:RGY ., I 'I 11."_ www.energylab.eom ~/rzt~ S'IIIu 1m Helena, liT 877-472-0711 • Billings, liT 800-735-4489 • Cuper, WY 888-235-0515 Gillette, WY .'&-&86-7175 • Rapid City, SD 888-672-1225 • Collage Station, 1)( 888-&10-2218 Workorder Receipt Checklist Denison Mines USA Corp IIIIII~ II~ ~III~! ~III ~~IIIIIIII ~IIIIIIII~I C11020163 Login completed by: Edith McPike Reviewed by: BL2000\kschroeder Reviewed Date: 2/8/2011 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? Sam pies in proper containerlbottle? Sample containers intact? Sufficient sample volume for indicated test? All samples received within holding time? ContainerfTemp Blanktemperature: 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: 2/4/2011 Received by: ckw Carrier name: FedEx No D No D No D No D No D No D No D No D No D No 0 No D No D Not Present D Not Present D Not Present III No VOAvials submitted D Not Applicable D Page 27 of 28 ~ Chain of Custody and Analytical Request Record page-Lof~ Company Name: -D--t."""·s~-,v Report Mail Address: f-(). ~e'~ j;/ t{ wi;" c] Invoice Address:~j fI1,~.s St.'1 fAr t/Ie) /1 Special Report/Formats: D ow o EOO/EOT(Electronic Data) D POTWMJWTP D State: Format:, ____ _ o LEVEL IV D Other:----o NELAC (Name, Location, Interval, etc_) Collection Date tV;1A 1-1I l2..nLll 2/1./1/ 3 MIA! ~.3.& i2Llw_ 4 MI....) -:~ J 1:2.1 I J 11 5-'I~~"1 fiL,,'!Lt:::. ~\ 6 7 8 9 Collection Time 12ro 1310 J 2ifO 1 Jl3.5 PLEASE PRINT (F'[ovide as much information as Dossible.l Project Name, PWS, Permit, Etc. 1 Sample Origin I ~ j-~lIt~ kr'L ~YLtrl'!L#~'l_ t:I'"'AlSt", .. " ~u" 't" Contact Name: Phone/Fax: C{, !rt /~ i-rY -Z"[2-/ Invoice Contact & Phone: 3: &IT&i\[6 W@O@ W~®(lJ)~~ID CI ~ ~o cn~ ~al~OI (j) ]j>~ i6'1ii t;'-... c Cllc;,,,,3: ~ 0>= ~ C) ""-u> 0 0 c o<t:~liDl~ ~ ,-diSc',:::: '"\ ~ a.ClI 00 ~ "E~I16' ....... :::J<1l.!::"&3: \..... zc..«IQ)o ~ E >1 ctI CIl ~ MATRIX J t. -lA) 1')(' ?-w 1)( t..-w IX ?a-rAJ 1 y. 0 w J: (J « I-l-« W w rJ) State: v..r Yes [J.--No 0 Email: Sampler: (Please Print) ~ JLI/'J~ JPnr/L, Purchase Order: Quote/Bottle Ord~y ... ~I R t: "0 c: e 1 U co e .... :::J ~ 1 5 ctI "0 c: co en I H Contact ELI prior to RUSH sample submittal for charges and scheduling -See Instruction Page Comments: .-LX ~r - Oiarll(S): C;,'e¥1 -I- Receipt Temp i:2. °c 0011;8: 0 Custody Seal On Bottle $N On Cooler N Intact Y N I Signatu re y Match ,~ ~ ~ Wi L'= ~ ~ W ~ ICO) ~ -~ 10 '~~O/U ~ ~ Custody Sfgnature S, Record Signalure ~ MU5Tbe - • f7) , r-/I IIlns ure: 51 a ned Sample Disposal: Return to Client: Lab Disposal: tV ~ \./ In certain circumstances, samples submitted to Energy Laboratories. Inc. may be subcontracted to oth,er Cehifled laboratories in order to complete the analysis requested. This serves as notice of this possibility. All sub-contract data will be cle~otated on your analytical report. Visit our web site at www.energylab.com for additional information, downloadable fee schedule, forms, and links. EN:RGY .' -', _I "d L ,,j'1 '-' W'iIW.energylab.com AMIJfIaI EInIIKI SIttw II1U Halena, MT 877-472-0111 • Billings, MT 8OD·135·4489 • Casper, WY 888·235-0515 GillBIt8, WY 888·888·7175 • Rapid City, SD 818·&72·1225 • Collage Sialion, TX 888-811102218 ANAL VTICAL SUMMARY REPORT March 15, 2011 Denison Mines USA Corp 6425 S Hwy 191 Blanding, UT 84511 Workorder No.: C11020352 Quote ID: C1640 -POC Wells Project Name: 1 st Quarter Groundwater 2011 Energy Laboratories, Inc. Casper WY received the following 8 samples for Denison Mines USA Corp on 2/11/2011 for analysis. Sample ID Client Sample ID Collect Date Receive Date Matrix Test C11020352-001 MW-14 02/07/11 13 :00 02/11/11 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 C11020352-002 MW-22 02/08/11 12:15 02/11/11 Aqueous Same As Above C11020352-003 MW-65 02/08/11 12:15 02 /11 /11 Aqueous Same As Above C11020352-004 MW-32 02/09/11 13 :20 02 /11 /11 Aqueous Gross Alpha minus Rn222 and Uranium C11020352-005 MW-27 02/09/11 12 :00 02/11 /11 Aqueous Chloride Nitrogen, Nitrate + Nitrite Gross Alpha minus Rn222 and Uranium Solids, Total Dissolved Sulfate C11020352-006 MW-24 02/10/11 08:00 02/11/11 Aqueous Metals by ICP/ICPMS, Dissolved C11020352-007 Trip Blank 5515 02/07/11 00 :00 02/11 /11 Aqueous SW8260B VOCs, Standard List C 11020352-008 Temp Blank 02/10/11 00 :00 02/11/11 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 cal l. Report Approved By: o¥~£) LJ~~ Reporting Supervisor Digitally signed by Stephanie Waldrop Date: 2011 .03.15 13:40:03 -06:00 Page 1 of 31 ,/ www.energylab.com AMI1tiUI fxuIIHu SIRu '151 Helene, MT 877-472-0711 • Billings, MT 800-735-4489 . Casper, WV 88.-235-0515 Gillette WV 866-186-7115 • Ra Id CI SD 888-&12-1225 · Colle e Station TX 888-S90-2218 CLIENT: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Report Date: 03/15/11 Sample Delivery Group: Cl1020352 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. 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 31 EN:RGY . ~ 1· .. 1 ~J ,I, •• ~.energylab.com ~El"'*-SIttu ,m Helena, NT 877-472-1711 • Billings, MT 800-735-4488 • Casper, WY 888-235-1515 Gillette, WY 81&-186-7175 . 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: 1 st Quarter Groundwater 2011 Report Date: 03/15/11 Work Order: C11020352 --------------------------------------------------------------, Analyte Method: A2320 B Sample 10: MBLK Alkalinity, Total as CaC03 Carbonate as C03 Bicarbonate as HC03 Count Result Units 3 Method Blank 2 ND 2 mglL mg/L mglL Sample 10: LCS Laboratory Control Sample Alkalinity. Total as CaC03 211 mg/L Sample 10: C11020361-00SAOUP 3 Sample Duplicate Alkalinity, Total as CaC03 112 mg/L Carbonate as C03 ND mg/L Bicarbonate as HC03 136 mg/L Sample 10: C11020361-00SAMS Sample Matrix Spike Alkalinity. Total as CaC03 245 mg/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration RL %REC Low Limit High Limit Run: MANTECH_11021SA Run: MANTECH_11021SA 5.0 10S 90 110 Run: MANTECH_11 0215A 5.0 5.0 5.0 Run: MANTECH_11021SA S.O 106 80 120 ND -Not detected at the reporting limit. RPO RPOLImit Qual 0.3 0.2 Batch: R142789 02l1S/11 15:42 02/15/11 15:58 02/15/11 17:23 10 10 10 02115111 17:32 Page 14 of 31 Er\ERGY . \ 'I , ., I r '~I. . , www.energylab.com """'~JIiIa 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4481 . Casper, WY 888-235-D515 GilieHe, WY 888-188-7175 • Rapid City, SD 188-&72-1225 • College Station, TX 181-680-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Analyte Count Method: A2540 C Result Units Sample 10: MBLK1_ Method Blank Solids, Total Dissolved TDS@ 180 C ND mg/L Sample 10: LCSC Laboratory Control Sample Solids, Total Dissolved TDS @ 180 C 995 mg/L Sample 10: C11020352-002AOUP Sample Duplicate Solids, Total Dissolved TDS @ 180 C 6790 mg/L Sample 10: C11020361-007BMS Sample Matrix Spike Solids, Total Dissolved TDS @ 180 C 2230 mg/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Report Date: 03/15/11 Work Order: C11020352 RL %REC Low Limit High limit Run: BAL-1 _110211B 10 Run: BAL-1_110211B 10 99 90 110 Run : BAL-C110211B 17 Run : BAL-e 11 0211 B 10 100 90 110 ND -Not detected at the reporting limit. RPO RPOLimit Qual 0.1 Batch: R142743 02/11 /11 14:24 02/11/11 14:25 02/11111 14:30 10 02/11/11 14:36 Page 15 of 31 --~ EI\ERGY .\ 1.",[, J.' '_ www.energylab.com AM/tIkM~ SIlu 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-8515 Gillette, W'f 88&-118-7175 • Rapid City, so 188-672-1225 • College Station, TX 888-1.8-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Report Date: 03/15/11 Work Order: Cll020352 Analyte Count Result Units Method: A4500-CI B Sample 10: MBLK9-110215 Chloride Sample 10: Cll020352-005A Chloride Sample 10: Cll020352-005A Chloride Sample 10: LCS35-110215 Chloride Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mg/L Sample Matrix Spike 222 mg/L Sample Matrix Spike Duplicate 224 mg/L Laboratory Control Sample 3550 mg/L RL %REC Low Limit High Limit RPO RPOLlmlt Qual Batch: 11 0215-CL-TTR-W Run: TITRATION_110215A 02/15/11 15:08 0.5 Run: TITRATION_110215A 02/15/1116:02 1.0 99 90 110 Run: TITRATION_110215A 02/15/11 16:04 1.0 100 90 110 0.8 10 Run: TITRATION_110215A 02/15/11 16:31 1.0 100 90 110 ND -Not detected at the reporting limit. Page 16 of 31 EN:RGY ,', ,)1 "d I !oL, " WWN.energyfab.com ~~SIItu 'lSI Helen., JIlT 877-472-0711 • Billings, MT 800-735-4488 . Casper, WY 888-235-D515 Gillette, WY 8&&-186-7175 • Rapid City, so 188-&12-1225 • ColiegeStation,1X 888-680-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Analyte Count Result Units Method: A4S00-F C Sample 10: MBLK Fluoride Sample 10: LCS Fluoride Sample 10: Cll020361-002AMS Fluoride Sample 10: Cll020361-002AMSO Fluoride Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank 0.02 mg/L Laboratory Control Sample 0.980 mg/L Sample Matrix Spike 1.28 mg/L Sample Matrix Spike Duplicate 1.28 mg/L Report Date: 03/15/11 Work Order: C 11020352 RL %REC Low Limit High Limit RPO RPOLlmlt Qual Batch: R142706 Run: MANTECH_ll 0211 A 02/11/1113:11 0.008 Run: MANTECH_ll 0211 A 02/11/11 13:13 0.10 96 90 110 Run: MANTECH_ll0211A 02/11/11 14:32 0.10 96 80 120 Run: MANTECH_l1 0211 A 02/11/11 14:35 0.10 96 80 120 0.0 10 ND -Not detected at the reporting limit. Page 17 of 31 EN:RGY ,', d ,,\I \ ,II, " www.energylab.wm AM/ftJcMfllull_:d l1tu /1St Helena, NT 877·472-0711 • Billings, MT 800·73,·4488 • CBSpet, WY 888-235·0515 Gillette, WY 88&·188·7175 • Rapid City, SD 118·&72·1225 • Collage Station, IX 118-680-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Analyte Count Method: A4500·H B Result Units Report Date: 03/15/11 Work Order: C11020352 RL %REC Low limit High Limit RPO RPOLimit Qual Sample 10: ICVC110211_2 pH Initial Calibration Verification Standard Analytical Run: ORION555A-2_110211B 02/11/11 14:16 Method: A4500·H B Sample 10: C11020361·004AOUP pH Sample 10: C11020361·007AOUP pH Qualifiers: RL -Analyte reporting limit. MDe -Minimum detectable concentration 6.91 S.u. 0.010 101 Sample Duplicate 7.82 s.u. 0.010 Sample Duplicate 8.07 S.u. 0.010 98 102 Run: ORION555A-2_11 0211 B Run: ORION555A-2_11 0211 B 0.1 0.1 02/11/11 15:05 3 02/11/1115:17 3 ND -Not detected at the reporting limit. Page 18 of 31 EI\ERGY ,'\ ~ ) I. \. I I I. "-" www.energylab.com AIu/tIIaI ~SIiIA '151 Helena, MT 877-472-0711 • Billings, MT 800-735-4488 • Casper, YN888-235-0515 Gillette, YNB88-IB8-7175 • Rapid City, SO 888-&72-1225 • College Station, 1J( 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Analyte Count Result Units Method: A4500·NH3 G Sample 10: MBLK-6 Nitrogen, Ammonia as N Sample 10: LCS·? Nitrogen, Ammonia as N Sample 10: C11020352-0020MS Nitrogen, Ammonia as N Sample 10: C11020352-0020MSO Nitrogen, Ammonia as N Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mg/L Laboratory Control Sample 2.02 mg/L Sample Matrix Spike 2.28 mg/L Sample Matrix Spike Duplicate 2.30 mg/L Report Date: Work Order: RL %REC Low Limit High Limit RPO Run: TECHNICON_11 0214A 0.02 Run: TECHNICON_11 0214A 0.050 101 90 110 Run: TECHNICON_11 0214A 0.050 10? 80 120 Run: TECHNICON_11 0214A 0.050 108 80 120 0.9 ND -Not detected at the reporting limit. 03/15/11 C11020352 RPOLimit Qual Batch: R142?39 02/14/11 12:18 02/14/11 12:20 02/14/11 12:31 02114/11 12 :34 10 Page 19 of 31 EN:RGY I"' '1 ••• 1. III • www.energylab.com f AMIytIuIlX~ s.u /151 HBIBna, MT 877-472-G7l1 • Billings, MT 800-73'-4488 • Casper, WY 888-235-0515 Gillette, 'NY 8&&-188-7175 • Rapid City, SD 188-&72-1225 • College Station, IX 888-&8D-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Analyte Count Result Units Method: A4500-S04 E Sample 10: LCS-l_ll0217 Sulfate Sample 10: MBLK-l_ll0217 Sulfate Sample 10: Cll020352-005AMS Sulfate Sample 10: Cl1020352-005AMSO Sulfate Method: A4500-S04 E Sample 10: LCS-l_ll0303 Sulfate Sample 10: MBLK-l_ll0303 Sulfate Sample 10: Cl1020544-012AMS Sulfate Sample 10: Cll020544-012AMSO Sulfate Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Laboratory Control Sample 4880 mg/L Method Blank 1 mg/L Sample Matrix Spike 642 mg/L Sample Matrix Spike Duplicate 640 mg/L Laboratory Control Sample 4810 mg/L Method Blank 2 mg/L Sample Matrix Spike 2550 mg/L Sample Matrix Spike Duplicate 2560 mg/L Report Date: 03/15/11 Work Order: C11020352 RL %REC Low limit High Limit RPO RPOLimit Qual Batch: 110217_C S04-TURB-W Run: TURB-2_11 0217 A 02/17/11 15:03 100 102 90 110 Run : TURB-2_110217A 02117/11 15:05 0.8 Run: TURB-2_110217A 02/17/11 15:55 10 97 90 110 Run: TURB-2_110217A 02/17/11 15:58 10 96 90 110 0.3 10 Batch: 110303_1_S04-TURB-W Run: TURB-2_11 0303A 03/03/11 10:39 100 100 90 110 Run: TURB-2_11 0303A 03/03/11 10:41 0.8 Run: TURB-2_11 0303A 03/03/11 12:51 50 98 90 110 Run: TURB-2_11 0303A 03/03/11 12:54 50 99 90 110 0.4 10 ND -Not detected at the reporting limit. Page 20 of 31 EN:RGY .', r I •• , I r I ~ 1 • www.energylab.com AM/yIIft/t r-r-. SIIa 'I!I Halena, NT 877-472-0711 • Billings, MT 800-735-4488 . Casper, WY 888-235-D515 Gillette, WY 888-188-7175 • Rapid CI1y, so 188-&72-1225 • College Station, 1)( 888-&80-2218 QA/Qe Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Analyte Count Result Units Method: E200.7 Sample 10: MB-110216A 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-110216A 5 Laboratory Fortified Blank Calcium 48.0 mg/L Iron 0.963 mg/L Magnesium 48.7 mg/L Potassium 43.4 mg/L Sodium 48.9 mg/L Sample ID: C11020307-002BMS2 5 Sample Matrix Spike Calcium 128 mg/L Iron 1.98 mg/L Magnesium 103 mg/L Potassium 92.6 mg/L Sodium 274 mg/L Sample 10: C11020307-002BMSO 5 Sample Matrix Spike Duplicate Calcium 127 mg/L Iron 1.96 mg/L Magnesium 103 mg/L Potassium 93.1 mg/L Sodium 276 mg/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Report Date: 03/15/11 Work Order: C11020352 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 96 96 97 87 98 98 97 94 90 100 97 96 94 90 101 Run: ICP2-C_110216A Run: ICP2-C_110216A 85 115 85 115 85 115 85 115 85 115 Run: ICP2-C_11 0216A 70 130 70 130 70 130 70 130 70 130 Run: ICP2-C_110216A 70 130 70 130 70 130 70 130 70 130 ND -Not detected at the reporting limit. Batch: R142839 02/16/11 12 :30 02/16/11 12 :34 02116111 17 :34 02/16/11 17 :38 0.5 20 1.2 20 0.4 20 0.5 20 0.4 20 Page 21 of 31 EN:RGY J",' <. )1 11' I I ~ I • ,. WWN.energylab.com AMITfIaI~StIm 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4481 • Cnper, WY 881-235-0515 Gillette, WY 886-&88-7175 • Rapid City, SD 188-672-1225 • College Station, TX 888-680-2218 QA/Qe Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 03/15/11 Project: 1 st Quarter Groundwater 2011 Work Order: C 11020352 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLImit Qual Method: E200.7 Batch: R143109 Sample 10: MB-110225A 5 Method Blank Run: ICP2-C_110225A 02/25/11 11 :50 Calcium ND mg/L 0.2 Iron 0.002 mg/L 0.002 Magnesium ND mg/L 0.05 Potassium ND mg/L 0.02 Sodium 0.5 mg/L 0.03 Sample 10: LFB-110225A 5 Laboratory Fortified Blank Run: ICP2-C_11 0225A 02/25/11 11 :54 Calcium 49.6 mg/L 0.50 99 85 115 Iron 0.965 mg/L 0.030 96 85 115 Magnesium 51.5 mg/L 0.50 103 85 115 Potassium 45.0 mg/L 0.82 90 85 115 Sodium 47.4 mg/L 0.50 94 85 115 Sample 10: C11020352-001BMS2 5 Sample Matrix Spike Run: ICP2-C_110225A 02/25/11 13:00 Calcium 730 mg/L 1.1 84 70 130 Iron 4.89 mg/L 0.030 95 70 130 Magnesium 395 mg/L 1.0 96 70 130 Potassium 235 mg/L 1.0 88 70 130 Sodium 582 mg/L 1.4 98 70 130 Sample 10: C11020352-001 BMSO 5 Sample Matrix Spike Duplicate Run: ICP2-C_11 0225A 02/25/11 13:04 Calcium 731 mg/L 1.1 85 70 130 0.2 20 Iron 4.92 mg/L 0.030 96 70 130 0.7 20 Magnesium 396 mg/L 1.0 96 70 130 0.4 20 Potassium 240 mg/L 1.0 89 70 130 1.9 20 Sodium 580 mg/L 1.4 97 70 130 0.4 20 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 22 of 31 EN:RGY ,\\ )1 ."ll.I~1 • www.energylab.com AIuIyfim rzullltN:l SIIu 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 8&&-&86-7175 • Rapid City, SO 888-672-1225 • College Station, TJ( 888-690-2218 QAlQC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 03/15/11 Project: 1 st Quarter Groundwater 2011 Work Order: C11020352 Analyte Count Result Units RL %REC Low limit High Limit RPO RPDLimit Qual Method: E200.8 Batch: R142806A Sample 10: C11020352-006AMS4 7 Sample Matrix Spike Run: ICPMS4-C_ll0215A 02/15/11 20:39 Beryllium 0.0376 mg/L 0.010 75 70 130 Cadmium 0.0486 mg/L 0.010 92 70 130 Chromium 0.0519 mg/L 0.050 104 70 130 Copper 0.0475 mg/L 0.010 94 70 130 Lead 0.0527 mg/L 0.050 105 70 130 Molybdenum 0.0517 mg/L 0.0010 100 70 130 Thallium 0.0544 mg/L 0.0010 106 70 130 Sample 10: C11020352-006AMSO 7 Sample Matrix Spike Duplicate Run : ICPMS4-C_ll0215A 02/15/11 20:46 Beryllium 0.0368 mg/L 0.010 74 70 130 2.0 20 Cadmium 0.0485 mg/L 0.010 91 70 130 0.3 20 Chromium 0.0522 mg/L 0.050 104 70 130 0.6 20 Copper 0.0479 mg/L 0.010 95 70 130 0.9 20 Lead 0.0531 mg/L 0.050 106 70 130 0.8 20 Molybdenum 0.0519 mg/L 0.0010 100 70 130 0.4 20 Thallium 0.0551 mg/L 0.0010 108 70 130 1.4 20 Sample 10: LFB 7 Laboratory Fortified Blank Run: ICPMS4-C_ll0215A 02/15/11 11 :59 Beryllium 0.0465 mg/L 0.0010 93 85 115 Cadmium 0.0504 mg/L 0.0010 101 85 115 Chromium 0.0546 mg/L 0.0010 109 85 115 Copper 0.0501 mg/L 0.0010 100 85 115 Lead 0.0543 mg/L 0.0010 109 85 115 Molybdenum 0.0514 mg/L 0.0010 103 85 115 Thallium 0.0548 mg/L 0.0010 110 85 115 Sample ro: LRB 7 Method Blank Run: ICPMS4-C_l10215A 02/15/11 11 :52 Beryllium NO mg/L 3E-05 Cadmium NO mg/L 7E-05 Chromium NO mg/L 5E-05 Copper NO mg/L 6E-05 Lead NO mg/L 2E-05 Molybdenum NO mg/L 8E-05 Thallium NO mg/L 2E-05 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MOC -Minimum detectable concentration Page 23 of 31 EN:RGY • !.' >l. ,I l ., ~ _ " www.energylab.com AMIytIMrz~ Silfu 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, Wi 888-235-0515 Gillette, 'NY 866-686-7175 • Rapid City, SO 888-672-1225 • College Station, TJ( 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Analyte Count Result Units Method: E200.8 Sample 10: Cll020352-006AMS4 13 Sample Matrix Spike Arsenic 0.0535 mg/L Cobalt 0.0584 mg/L Lead 0.0541 mg/L Manganese 5.08 mg/L Mercury 0.00571 mg/L Nickel 0.0809 mg/L Selenium 0.0593 mg/L Silver 0.0158 mg/L Thallium 0.0564 mg/L Tin 0.0461 mg/L Uranium 0.0570 mg/L Vanadium 0.0562 mg/L Zinc 0.0922 mg/L Sample 10: Cl1020352-006AMSO 13 Sample Matrix Spike Duplicate Arsenic 0.0535 mg/L Cobalt 0.0595 mg/L Lead 0.0546 mg/L Manganese 5.12 mg/L Mercury 0.00577 mglL Nickel 0.0813 mg/L Selenium 0.0585 mg/L Silver 0.0162 mg/L Thallium 0.0571 mg/L Tin 0.0483 mg/L Uranium 0.0578 mg/L Vanadium 0.0559 mg/L Zinc 0.0922 mg/L Sample 10: LRB 13 Method Blank Arsenic NO mg/L Cobalt NO mg/L Lead NO mg/L Manganese NO mg/L Mercury NO mg/L Nickel NO mg/L Selenium NO mg/L Silver NO mg/L Thallium NO mg/L Tin 0.0003 mg/L Uranium 2E-OS mg/L Vanadium NO mg/L Zinc 0.003 mg/L Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. Report Date: 03/15/11 Work Order: Cll020352 RL %REC Low Limit High Limit RPO RPOLlmlt Qual Batch: R142844A Run: ICPMS4-C_ll 0216A 02/17/11 00:26 0.0010 107 70 130 0.010 101 70 130 0.050 108 70 130 0.010 70 130 A 0.0010 114 70 130 0.050 99 70 130 0.0010 108 70 130 0.010 79 70 130 0.0010 110 70 130 0.0010 92 70 130 0.00030 110 70 130 0.0010 112 70 130 0.010 86 70 130 Run: ICPMS4-C_ll 0216A 02117/11 00:32 0.0010 107 70 130 0.0 20 0.010 103 70 130 1.7 20 0.050 109 70 130 1.0 20 0.010 70 130 0.9 20 A 0.0010 115 70 130 1.1 20 0.050 100 70 130 0.6 20 0.0010 106 70 130 1.4 20 0.010 81 70 130 2.4 20 0.0010 111 70 130 1.1 20 0.0010 97 70 130 4.6 20 0.00030 112 70 130 1.3 20 0.0010 111 70 130 0.6 20 0.010 85 70 130 0.1 20 Run: ICPMS4-C_l1 0216A 02/16/11 13:25 4E-05 lE-05 2E-05 2E-05 2E-05 5E-OS SE-05 8E-OS 2E-05 0.0002 8E-06 lE-05 0.0001 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 24 of 31 EN:RGY ,', . )1.:-1 (.)~, • www.energylab.com AMlTfJuI tx"'-' ~ /ISI Helena, MT 877-472-0711 • Billing!, MT 800-735-4481 • Casper, WY 888-235-0515 Gillette, WY 8&&-188-7175 • Rapid City, SD 888-872-1225 • College Station, 1X 888-880-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 03/15/11 Project: 1 st Quarter Groundwater 2011 Work Order: C11020352 Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimlt Qual Method: E200.B Batch: R142B44A Sample 10: LFB 13 Laboratory Fortified Blank Run: ICPMS4-C_ll0216A 02/16/11 13:32 Arsenic 0.0550 mg/L 0.0010 110 85 115 Cobalt 0.0541 mg/L 0.0010 108 85 115 Lead 0.0536 mg/L 0.0010 107 85 115 Manganese 0.0538 mg/L 0.0010 107 85 115 Mercury 0.00525 mg/L 0.0010 105 85 115 Nickel 0.0549 mg/L 0.0010 110 85 115 Selenium 0.0552 mg/L 0.0010 110 85 115 Silver 0.0217 mg/L 0.0010 108 85 115 Thallium 0.0542 mg/L 0.0010 108 85 115 Tin 0.0528 mg/L 0.0010 105 85 115 Uranium 0.0536 mg/L 0.00030 107 85 115 Vanadium 0.0540 mg/L 0.0010 108 85 115 Zinc 0.0591 mg/L 0.0010 111 85 115 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 25 of 31 EN:RGY /\ , ) I • ,~ I ~ II ~ t, '. www.energylab.com AIu/tfIQI rxc.IIIta SIIa 1m Helena,!IT 877-472-0711 • Billings, MT 800·735-4488 • Casper, WY 888·235-0515 Gillette, WY 886·188·7175 • Rapid CHy, SD 188·&72·1225 • College Station, 1X aal.aIO·2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Analyte Count Result Units Method: E353.2 Sample 10: MBLK·1 Nitrogen, Nilrate+Nitrite as N Sample 10: LCS·2 Nitrogen, Nitrate+Nitrite as N Sample 10: C11020361·001EMS Nitrogen, Nitrate+Nitrite as N Sample 10: C11020361·001EMSO Nitrogen, Nitrate+Nitrite as N Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mg/L Laboratory Control Sample 2.52 mg/L Sample Matrix Spike 2.12 mg/L Sample Matrix Spike Duplicate 2.16 mg/L Report Date: Work Order: RL %REC Low Limit High LImit RPO Run: TECHNICON_110215A 0.06 Run: TECHNICON_11 0215A 0.10 101 90 110 Run: TECHNICON_110215A 0.10 106 90 110 Run: TECHNICON_110215A 0.10 108 90 110 1.9 ND -Not detected at the reporting limit. 03/15/11 C11020352 RPOLimit Qual Batch: R142784 02/15/11 12 :23 02115/11 12:25 02115/11 13:18 02/15/11 13:20 10 Page 26 of 31 EN:RGY ,",\ l'I.,.''-'" . www.energylab.com W/ffIaI ExuIIwa SIIru '151 Helena, MT 877-472-0711 • Billings, MT 800-735-4488 . Casper, WY 888-235-1515 Gillette, WY 88&-IM· 7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-&80-221 a OA/oe Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Analyte Count Result Units Method: E900.1 Sample 10: MB·GA·0393 Gross Alpha minus Rn & U 3 Method Blank -0.06 pCi/L pC ilL pCi/L Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Sample 10: LCS·GA-0393 Gross Alpha minus Rn & U Sample 10: Cll020352-005BMS Gross Alpha minus Rn & U Sample 10: Cll020352-005BMSO Gross Alpha minus Rn & U Method: E900.1 0.3 0.6 Laboratory Control Sample 24.1 pCi/L Sample Matrix Spike 21.S pCi/L Sample Matrix Spike Duplicate 23.6 pCi/L Sample 10: MB·GA·0408 3 Method Blank Gross Alpha minus Rn & U -O.OS pC ilL Gross Alpha minus Rn & U Precision (±) 0.07 pCi/L Gross Alpha minus Rn & U MDC 0.1 pCi/L Sample 10: LCS·GA·0408 Laboratory Control Sample Gross Alpha minus Rn & U 11.7 pCi/L Sample 10: TAP WATER·MS Sample Matrix Spike Gross Alpha minus Rn & U 11.4 pCi/L Sample 10: TAP WATER·MSO Sample Matrix Spike Duplicate Gross Alpha minus Rn & U 10.9 pC ilL Method: E900.1 Sample 10: MB·GA·0395 3 Method Blank Gross Alpha minus Rn & U -0.07 pC ilL Gross Alpha minus Rn & U Precision (±) 0.06 pCi/L Gross Alpha minus Rn & U MDC 0.1 pCi/L Sample 10: LCS·GA-0395 Laboratory Control Sample Gross Alpha minus Rn & U 11 .6 pCi/L Sample 10: Cll020352-001CMS Sample Matrix Spike Gross Alpha minus Rn & U 20.2 pC ilL Sample 10: Cl1 020352-001 CMSO Sample Matrix Spike Duplicate Gross Alpha minus Rn & U 20.2 pCi/L Qualifiers: RL -Analyte reporting limit. MDe -Minimum detectable concentration Report Date: 03/15/11 Work Order: C11020352 RL %REC Low Limit High Limit Run: GSOOOW_110214B Run: GSOOOW_110214B 11S 70 130 Run: GSOOOW_ll0214B 93 70 130 Run: GSOOOW _11 0214B 102 70 130 Run: GSOOOW_l10311A Run: GSOOOW_ll0311A 111 70 130 Run: GSOOOW_ll0311A 107 70 130 Run: GSOOOW_l10311A 102 70 130 Run: GS42M_l10217A Run: G542M_l10217A 111 70 130 Run: GS42M_ll0217A 94 70 130 Run: GS42M_ll0217A 94 70 130 ND -Not detected at the reporting limit. RPO RPOLimit Qual 9.1 4.4 0.2 Batch: GA-0393 02117/11 18:04 U 02/17/11 18:04 02117111 18:04 02/17/11 18:04 2S.2 Batch: GA-0408 03/14/11 21 :33 U 03114/11 21 :33 03/14/11 21 :33 03/14/11 21 :33 17.7 Batch: GA-0395 02/22/11 22:32 U 02/22/11 22:32 02123/11 05 :25 02/23/11 05:25 17 U -Not detected at minimum detectable concentration Page 27 of 31 EN:RGY .' I\t_'-.1r."I' ;{I. 'j www.enet.gyI8b.com AIu/yIkIII E.ruIIIsD SIttu lISt Helena, MT877-472-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 Gillette, WY &&&-186-7175 • Rapid City, so 188-672-1225 • Colleg8 Station, 1X 188-680-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 03/15/11 Project: 1 st Quarter Groundwater 2011 Work Order: C11020352 Analyte Count Result Units RL %REC Low limit High Limit RPD RPDLimlt Qual Method: SW8260B Batch: R142719 Sample 10: 021111_LCS3 16 Laboratory Control Sample Run: SATURNCA_ll0211A 02/11/11 17:18 Acetone 120 ug/L 20 116 70 130 Benzene 11 ug/L 1.0 109 70 130 Carbon tetrachloride 11 ug/L 1.0 111 70 130 Chloroform 12 ug/L 1.0 118 70 130 Chloromethane 11 ug/L 1.0 107 70 130 m+p-Xylenes 21 ug/L 1.0 105 70 130 Methyl ethyl ketone 130 ug/L 20 126 70 130 Methylene chloride 11 ug/L 1.0 108 70 130 Naphthalene 11 ug/L 1.0 108 70 130 o-Xylene 10 ug/L 1.0 103 70 130 Toluene 11 ug/L 1.0 107 70 130 Xylenes, Total 31 ug/L 1.0 104 70 130 Surr: 1,2-0ichlorobenzene-d4 1.0 100 80 120 Surr: Oibromofluoromethane 1.0 110 70 130 Surr: p-Bromofluorobenzene 1.0 110 80 130 Surr: Toluene-d8 1.0 103 80 120 Sample 10: 021111_MBLK_6 16 Method Blank Run: SATURNCA_ll0211A 02/11/11 18:30 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 98 80 120 Surr: Oibromofluoromethane 1.0 105 70 130 Surr: p-Bromofluorobenzene 1.0 100 80 120 Surr: Toluene-d8 1.0 102 80 120 Sample 10: C11020361-0051MS 16 Sample Matrix Spike Run: SATURNCA_ll0211A 02/12111 00 :31 Acetone 1200 ug/L 200 116 70 130 Benzene 100 ug/L 10 105 70 130 Carbon tetrachloride 110 ug/L 10 112 70 130 Chloroform 110 ug/L 10 114 70 130 Chloromethane 100 ug/L 10 102 70 130 m+p-Xylenes 200 ug/L 10 101 70 130 Methyl ethyl ketone 1200 ug/L 200 118 70 130 Methylene chloride 100 ug/L 10 104 70 130 Naphthalene 100 ug/L 10 101 70 130 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MOC -Minimum detectable concentration Page 28 of 31 EN:RGY /\, I< '11.\ 1'-loll'. www.energylab.com AMIyIfuI £ruIiMIcI SIx. tlJl Helena, MT 877-472-0711 • Billings, MT 800-135-4489 • Cuper, WY 888-235-0515 Gillette, WY 8&&-116-7175 • Rapid City, SO 888-672-1225 • College Station, IX 888-690-2218 QA/Qe Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 03/15/11 Project: 1 st Quarter Groundwater 2011 Work Order: C11020352 Analyte Count Result Units RL %REC Low Limit High limit RPO RPOLlmlt Qual Method: SW8260B Batch: R142719 Sample 10: C11020361-0051MS 16 Sample Matrix Spike Run: SATURNCA_l10211A 02/12/11 00 :31 o-Xylene 100 ug/L 10 100 70 130 Toluene 100 ug/L 10 100 70 130 Xylenes, Total 300 ug/L 10 101 70 130 Surr: 1,2-Dichlorobenzene-d4 1.0 95 BO 120 Surr: Dibromofluoromethane 1.0 106 70 130 Surr: p-Bromofluorobenzene 1.0 100 BO 120 Surr: Toluene-dB 1.0 100 80 120 Sample 10: C11020361-0051MSO 16 Sample Matrix Spike Duplicate Run: SATURNCA_ll0211A 02112111 01 :08 Acetone 1200 ug/L 200 124 70 130 6.3 20 Benzene 110 ug/L 10 110 70 130 4.5 20 Carbon tetrachloride 110 ug/L 10 lOB 70 130 3.6 20 Chloroform 110 ug/L 10 112 70 130 1.4 20 Chloromethane 100 ug/L 10 103 70 130 1.2 20 m+p-Xylenes 210 ug/L 10 104 70 130 3.3 20 Methyl ethyl ketone 1300 ug/L 200 134 70 130 12 20 S Methylene chloride 110 ug/L 10 106 70 130 2.3 20 Naphthalene 110 ug/L 10 114 70 130 12 20 o-Xylene 100 ug/L 10 102 70 130 1.2 20 Toluene 100 ug/L 10 101 70 130 1.2 20 Xylenes, Total 310 ug/L 10 103 70 130 2.6 20 Surr: 1,2-Dichlorobenzene-d4 1.0 102 80 120 0.0 10 Surr: Oibromofluoromethane 1.0 106 70 130 0.0 10 Surr: p-Bromofluorobenzene 1.0 106 80 120 0.0 10 Surr: Toluene-dB 1.0 103 80 120 0.0 10 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MOC -Minimum detectable concentration S -Spike recovery outside of advisory limits. Page 29 of 31 EN:RGY '-', , ..... I r lIlt·. www.energylab.com Au/fffaI EIaIIIIa .. IISZ Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Cuper, WY 818-235-0515 Gillotta, WY 118-888-7175 • Rapid City, SD 111-172-1225 • College StatiDn, 1X 818-&81-2218 Workorder Receipt Checklist Denison Mines USA Corp I~II~IIIII ~IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII C11020352 Login completed by: Corinne Wagner Reviewed by: BL2000\kschroeder Reviewed Date: 2/14/2011 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? Sam pies in proper containerlbottle? 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 D Yes 0' Yes 0' Yes 0' Yes 0 Yes 0' Yes 0' Yes 0 2·C On Ice Yes 0' Yes 0' Date Received: 2/11/2011 Received by: ckw Carrier name: FedEx No D No D No D No D No D No 0 No D No D No D No D No D No D Not Present D Not Present D Not Present 0' No VOA vials submitted D Not Applicable D Page 30 of 31 Chain of Custody and Analytical Request Record Page _\_ of _1_ IU'(leV Bm-liIIilXllB' PLEASE PRINT (Provide as much information as possible.) Company Name: Project Name, PWS, Permit, Etc. Sample Origin EPA/State Compliance: De.I'i>c(\ M:r\c.s I ~-r U~rtU' G-ro,-\"J. v:..o...tu-;:J..0l/ State: l:.\.T Yes Er No 0 Report Mail Address: Pc Bc>C oX C'\ Contact Name: Phone/Fax: Email: Sampler: (Please Print) Blo.1\8,;"...,\ \AI ~'1.'>\1 n~",(\ Pc.. \/'¥l<.r Y3S b''iS ;!2.:tl ....,-:;::,,"U MolI;~'f Invoice Address: Invoice Contact & Phone: Purchase Order: Quote/Bottle Order: ~"tvlc:.. SUo-"" t.... Special Report'Formats: 3: &~&[b W@O® OOrn@!ID(g@'D'[§@ .. Contact ELI prior to ~IFedfx~ a Q; RUSH sample submittal ~o~£ for charges and Cooler lOis): cCD=O I Q; 0 ~ R scheduling -See e)~ 4'1t.(;) ._> 0 >-(5 W t:. Instruction Page D ow o EDD/EDT(Electronic Data) BU)~ ~3: 5 3:'5 ro 0) <) :c "0 ReceiptTemp o POTWrwWTP ~ U c Comments: Format: ~~u)I·Q ~ :r ::l U ~ o ... all c oj ~ « 0 °c D State: o LEVEL IV ... •• Q) t::--'1-t-C\I o Other: o NELAC ~~I,g o v ~ ~ t-E On Ice: YJN I'-ro ' ~ « :::l E C1>.= CD 3: <t "( ~ l-S ~o.<t:l ~o -;) ./ w -0 Custody Seal ~ ~ 01 ... E >1 ~ W as 0",_ ~: '" j i 'C ~ E en "0 U) P -!: On Cooler N .E 1 1 ~ H Intact Y N ~ .~ ({) SAMPLE IDENTIFICATION Collection Collection :-f S MATRIX v \J '/\ \j SIgnature {Y N (Name, Location, Interval, etc.) Date Time Z \-t-Match ~ 1 MW iL.\ ~('~~Il I~CO G:.~ vJ 1-~ 2 ~ MiN ~ -'g-;l.:>I\ J~LS b-W .x ~ 3 6,S ~ MVJ 1:l.-~·;lOI \ t;)..IS G,.-W .,. ftn n 4 3~ kw :;..~-~,\ I~C ) -w "'f.. ~ I 5 M'vJ ;;).7 l;l. .q -J.o II \~ ~-\J Y. "j.. 'I.. ~ 'I.. ~j\~~~ 6 1'-\ IN ~'i b.-Ie ·lD\I c>l,DD \-w 'i--'f.-~ .. I 7-'-r ',p ~\o..t'\k ~JS-~ -7 -.:20'\ \ ~ ~ B ~ 0 9 r! 10 Ic:d} Custody Relinquished by tpn:r -OatelTlme: slgna/ti ll,_ L R=r.'!!<! by (Prtnl): Oatorn"",: Signature; -r,;"'J\~r }.\b\l~ , .. ll ;1./ Ie.! ;::ttl \ \ lu~C:. ::JaJI..I'\i'. ~ Record Relinqulsh&d by (print): '-.J OatefTime: Signature: U Receiwd by (pripl): OatefTlme: Signature: MUST be Signed ""C~~Y"P>lWL talOry: dli/III {'f)/K ~n8Iure; Sample Disposal: Return to Client: Lab Disposal: ') .. ,--tvv'\. Irt?i~ .Ia~ratori~~~~~~~~~_t~~mplete the analysis requested. In certain Circumstances, samp.!.:s sub~~~~_ t~ _~.~er~~ .~~b~~~.o,~i~, In~;. ~a~ ~~_~~_~oJn~~ct~ !~ O~h~r, C1 \,,~,. ~ ...... o h ,,;to ",t WUlW .. n .. rnvl~b,com for additional information, downloadable fee schedule, forms, and links. EN:RGY ,"'.', )1',,1, f/' "_. www.energylab.com AM/fIIaI EmfIIcI DIe. 11M Helena, MT B11-472-0711 • Billings, MT B08-735-4489 • Casper, WY 881-235-8515 Gillette, WY 18&-888-1175 • Rapid City, SD 188-&72-1225 • Collags station, TX 881-610-2218 ANAL VTICAL SUMMARY REPORT March 24, 2011 Denison Mines USA Corp 6425 S Hwy 191 Blanding, UT 84511 Workorder No.: C11020544 Quote ID: C1640 -POC Wells Project Name: 1 st Quarter Groundwater 2011 Energy Laboratories, Inc. Casper WY received the following 16 samples for Denison Mines USA Corp on 2/18/2011 for analysis. Sample 10 Client Sample 10 Collect Date Receive Date Matrix Test C11020544-001 MW-2 02/14/11 09 :40 02/18/11 Aqueous Gross Alpha minus Rn222 and Uranium C11020544-002 MW-3 02/15/11 10:35 02/18/11 Aqueous Metals by ICP/ICPMS, Dissolved Fluoride C11020544-003 MW-3A 02/16/11 10:05 02/18/11 Aqueous Metals by ICPIICPMS, Dissolved Solids, Total Dissolved Sulfate C 11 020544-004 MW-5 02/14/11 13 :20 02/18/11 Aqueous Metals by ICPIICPMS, Dissolved C11020544-005 MW-12 02/15/11 07 :50 02/18/11 Aqueous Same As Above C11020544-006 MW-18 02/15/11 14:40 02/18/11 Aqueous Metals by ICPIICPMS, Dissolved Solids, Total Dissolved Sulfate C11020544-007 MW-28 02/14/11 11 :20 02/18/11 Aqueous Chloride C11020544-008 MW-20 02/16/11 10:45 02/18/11 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 C11020544-009 MW-26 02/16/11 12 :26 02/18/11 Aqueous Same As Above C11 020544-01 0 MW-34 02/16/11 08 :30 02/18/11 Aqueous Same As Above C11020544-011 MW-35 02/1 5/11 12 :40 02/18/11 Aqueous Same As Above C11020544-012 MW-70 02/1 5111 14 :40 02/18/11 Aqueous Metals by ICPIICPMS, Dissolved Solids, Total Dissolved Sulfate Page 1 of 44 / r EN:RGY ,",,-,:'->1·,,1 :....11 .... 1 _~ C11020544-013 MW-60 C11020544-014 MW-35R C11020544-015 Trip Blank 6092 C11020544-016 Temp Blank Halana, MT 877-472-0111 • Billings, MT 100·735-44811 • Caspar, WY 881·235-1515 Gil/alta, WY 88&-186·7175 . Rapid City, SD 888-172·1225 . College Station, TX 881-680-2218 ANALYTICAL SUMMARY REPORT 02/16/11 13 :00 02/18/11 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 02/14/11 08 :20 02/18/11 Aqueous Same As Above 02/16/11 00 :00 02/18/11 Aqueous SW8260B VOCs, Standard List 02/16/11 00 :00 02/18/11 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: Digitally signed by Stephanie Waldrop Date: 2011.03.24 12:36:31 -06:00 Page 2 of 44 EN:RGY f~ "\!lUI.;,IClll". L-";::"~ www.energylab.com AM/ytIaI buIIftu smc. IIU Helena, MT877-472-11711 • Billings, MT BOO-135-4489 . Casper, WY 888-235-0515 Gillette WY 866·186·7115 • Ra Id CI SO 888·&72·1225 · Colla e Station IX 888·680·2218 CLIENT: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Report Date: 03/24/11 Sample Delivery Group: C11020544 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. 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 3 of 44 '. EN:RGY _."l.l_01.,",IL.II' ..... www.energylab.com AIMItfIm~5*u rm Helena, tiT 877-472-0711 • Billings, MT 801·735-4489 • Casper, WY 881-235·1515 GllleHe, WY 81&-186·7175 • Rapid City, SD 888·172·1225 • College Station, 1X 88H80·2218 QA/Qe Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Analyte Method: A2320 B Sample 10: C11020543-0D4AMS Alkalinity, Total as CaC03 Count Result Units Sample Matrix Spike 249 mg/L Sample 10: C11D2D544-013AOUP 3 Sample Duplicate Alkalinity, Total as CaC03 2.05 mg/L Carbonate as C03 ND mg/L Bicarbonate as HC03 2.50 mg/L Sample 10: MBLK Alkalinity, Total as CaC03 Carbonate as C03 Bicarbonate as HC03 3 Method Blank Sample 10: LCS Alkalinity, Total as CaC03 Qualifiers: RL -Analy1e reporting limit. MOC -Minimum detectable concentration ND mg/L ND mg/L ND mg/L Laboratory Control Sample 213 mg/L Report Date: 03/24/11 Work Order: C11020544 RL %REC Low Limit High Limit 5.0 5.0 5.0 5.0 5.0 Run: MANTECH_11 021 BB 104 80 120 Run : MANTECH_110218B Run: MANTECH_11 0218B Run: MANTECH_11 021 BS 106 90 110 ND -Not detected at the reporting limit. RPO RPOLimlt Qual Batch: R142923 02/18/11 19:03 02/18/11 20:17 10 10 10 02/1 B/11 20:32 02/18/11 20:45 Page 26 of 44 EN:RGY ,.,j' l(,/\I t. 1--11. " www.energylab.com ItIIIIyIkM ExaIIHa SII/c, 1m Helena, MT 177-472-0711 • Billings, MT 800-735-4488 • Casper, WY 888-235-0515 Gillette, WY 86&-186-7175 • Rapid City, SD 888-672-1225 • College Station, IX 888-680-2218 QA/Qe Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Analyte Count Result Units Method: A2540 C Sample 10: MBLK1_ Solids, Total Dissolved TDS @ 180 C Sample 10: LCS1_ Solids, Total Dissolved TDS @ 180 C Sample 10: C11020544-009AMS Solids, Total Dissolved TDS @ 180 C Method Blank ND mg/L Laboratory Control Sample 985 mg/L Sample Matrix Spike 5300 mg/L Sample 10: C11020544-014AOUP Sample Duplicate Solids, Total Dissolved TDS @ 180 C 7.88 mg/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Report Date: 03/24/11 Work Order: Cl1020544 RL %REC Low Limit High Limit RPO RPOLimlt Qual Run : BAL-l_ll0218B 4 Run : BAL-l_110218B 10 98 90 110 Run: BAL-l_ll0218B 10 101 90 110 Run : BAL-l_110218B 10 ND -Not detected at the reporting limit. Batch : R143010 02/18/11 15 :48 02/18/11 15:48 02/18/11 16:00 02118111 16:02 10 Page 27 of 44 EN:RGY /'! \' '1 /, I,; I ~I r .: www.energylab.com ~EXuIIHt:I sac. flU Helena, MT 877-472-0711 • Billings, MT 800-731-4488 • Casper, WY 888-235-0515 GllieHa, WY 888-188-7175 . Rapid City, SD 888-672-1225 • COIIUgD Station,1X 888-68D-2218 QA/Qe Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Report Date: 03/24/11 Work Order: C11020544 Analyte Count Result Units Method: A4500-CI B Sample 10: MBLK9-110228 Chloride Sample 10: C11020664·001A Chloride Sample 10: C11020664·001A Chloride Sample 10: LCS35-110228 Chloride Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mg/L Sample Matrix Spike 232 mg/L Sample Matrix Spike Duplicate 234 mg/L Laboratory Control Sample 3610 mg/L RL %REC Low Limit High Limit RPO RPOLlmlt Qual Batch: 11 0228-CL-TTR-W Run: TITRATION_11 0228A 02128/11 10:46 0.5 Run: TITRATION_110228A 1.0 100 90 110 Run: TITRATION_11 0228A 1.0 101 90 110 Run: TITRATION_110228A 1.0 102 90 110 ND -Not detected at the reporting limit. 0.7 02/28/11 11 :25 02/28/11 11 :46 10 02/28/11 12:25 Page 28 of 44 EN:RGY ,"" ., } I j ~.~ I' ,-< I •• www.energytab.com A/uIffk2/~SiJIc.'151 Helena, MT 877-472-0711 • Billings, PM BGO-735-4488 • Casper, WY 881-235-1515 GllleHe, WY 8&8-186-7175 • Rapid City, SD 888-572-1225 • College Station, TX 888-S80-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Analyte Count Result Units Method: A4500-F C Sample 10: MBLK Fluoride Sample 10: LCS Fluoride Sample 10: C11020544-011AMS Fluoride Sample 10: C11020544-011AMSO Fluoride Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank 0.02 mg/L Laboratory Control Sample 1.00 mg/L Sample Matrix Spike 1.24 mg/L Sample Matrix Spike Duplicate 1.24 mg/L Report Date: Work Order: RL %REC Low Limit High Limit RPO Run: MANTECH_11 0218A 0.008 Run: MANTECH_110218A 0.10 98 90 110 Run: MANTECH_110218A 0.10 92 80 120 Run: MANTECH_11 0218A 0.10 92 80 120 0.0 ND -Not detected at the reporting limit. 03/24/11 C11020544 RPOLimit Qual Batch: R142916 02/18/11 12:26 02118111 12:28 02/18/11 16:13 02/18/11 16:16 10 Page 29 of44 EI\ERGY ,'I --. J 11 ,., I ~ ,.1/ ~. www.energylab.com AMIyfIettI ~ SfIIu 1m Helena, lIT 877-472-0711 • Billings, lIT 800-735-4489 • Casper, WY 888-235-0515 GllleHe, WY 888-186-7175 • Rapid City, SD 188-172-1225 • College Station, TX 888-680-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Report Date: 03/24/11 Work Order: C11020544 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: A4500-H B Sample 10: ICV1_110218_2 pH Method: A4500-H B Sample 10: C11020544-010AOUP pH Method: A4500-H B Sample 10: ICV1_110222_1 pH Method: A4500-H B Sample 10: C11020544-012AOUP pH Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Initial Calibration Verification Standard 6.96 s.u. 0.010 101 Sample Duplicate 7.54 s.u. 0.010 Initial Calibration Verification Standard 6.92 s.u. 0.010 101 Sample Duplicate 6.94 s.u. 0.010 98 Analytical Run: ORION555A-2_11 021 BB 02/1 B/11 13:25 102 Batch: 11021 B_2]H-W _555A-2 Run: ORION555A-2_110218B 02/18/11 15:53 3 98 1.6 Analytical Run: ORION555A-2_11 0222A 02/22/11 09:13 102 Run: ORION555A-2_110222A 02122/11 09:46 3 0.4 ND -Not detected at the reporting limit. Page 30 of 44 EI\ERGY .... Il\.)(./\I UllI '.3 www.energylab.com AIuIyIIa/ rx.u-SIIa '112 Helena, MT 877-472-0711 • Billings, MT BGO-735-4488 • Casper, WY 881-235-8515 Gillette, WY 868-186-7175 • Rapid City, SD 188-&72-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Analyte Count Result Units Method: A4500-NH3 G Sample 10: MBLK-6 Nitrogen, Ammonia as N Sample 10: LCS-7 Nitrogen, Ammonia as N Sample 10: Cll 020568-001 EMS Nitrogen, Ammonia as N Sample 10: Cll020568-001EMSO Nitrogen, Ammonia as N Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mg/L Laboratory Control Sample 1.98 mg/L Sample Matrix Spike 2.11 mg/L Sample Matrix Spike Duplicate 2.17 mg/L Report Date: 03 /24/11 Work Order: Cll020544 RL %REC Low Limit High limit Run : TECHNICON_11 0225A 0.02 Run : TECHNICON_ll 0225A 0.050 99 90 110 Run: TECHNICON_ll 0225A 0.050 102 80 120 Run: TECHNICON_11 0225A 0.050 105 80 120 ND -Not detected at the reporting limit. RPO RPDLimlt Qual 2.8 Batch: R143098 02/25/11 11 :50 02/25/11 11 :52 02/25/11 12:34 02/25/11 12:36 10 Page 31 of 44 EI\ERGY .~.. r.J I I,. , I.~ 1.(' •• ~ www.energylab.com AMIytIuI EltuIMot:. SIiIu 1m Helana, Mf 877-472-0711 • Billings, lIT BOO-735-4488 • Casper, WY 888-235-D515 Gillette, WY 8&&-18&-7175 • Rapid City, SO 118-&72-1225 • Coliege Station, 1X 881-&10-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Analyte Method: A4500-S04 E Sample 10: C11020544-012AMS Sulfate Sample 10: C11020544-012AMSO Sulfate Sample 10: LCS-2_110303 Sulfate Sample 10: MBLK-2_110303 Sulfate Qualifiers: RL -Analyte reporting limit. Count Result Units Sample Matrix Spike 2550 mg/L Sample Matrix Spike Duplicate 2560 mg/L Laboratory Control Sample 4890 mg/L Method Blank O.B mg/L MDC -Minimum detectable concentration Report Date: 03/24/11 Work Order: C11020544 RL %REC Low Limit High Limit RPO RPOLimit Qual Batch: 110303_1_S04-TURB-W Run: TURB-2_110303A 03/03/11 12:51 50 98 90 110 Run: TURB-2_110303A 03/03/11 12:54 50 99 90 110 0.4 10 Run: TURB-2_11 0303A 03/03/11 13:37 100 102 90 110 Run: TURB-2_110303A 03/03/11 13:41 O.B ND -Not detected at the reporting limit. Page 32 of 44 EN:RGY • \! 'I. " I ( .1 ~. '. Client: Denison Mines USA Corp Helena, MT 877-472-0711 • Billings, MT BGO-73D-4489 . Casper, WY 888-235-0515 Gillette, WY 888-188-7175 • Rapid City, SD 188-&72-1225 • College Station, IX 881-610-2218 QA/QC Summary Report Prepared by Casper, WY Branch Report Date: 03/24/11 Project: 1st Quarter Groundwater 2011 Work Order: C11020544 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: E200.7 Batch: R143109 Sample 10: MB-110225A 5 Method Blank Run: ICP2-C_11 0225A 02125/11 11 :50 Calcium ND mg/L 0.2 Iron 0.002 mg/L 0.002 Magnesium ND mg/L 0.05 Potassium ND mg/L 0.02 Sodium 0.5 mg/L 0.03 Sample 10: LFB-110225A 5 Laboratory Fortified Blank Run: ICP2-C_11 0225A 02/25/11 11 :54 Calcium 49.6 mg/L 0.50 99 85 115 Iron 0.965 mg/L 0.030 96 85 115 Magnesium 51.5 mg/L 0.50 103 85 115 Potassium 45.0 mg/L 0.82 90 85 115 Sodium 47.4 mg/L 0.50 94 85 115 Sample 10: C11020352-001 BMS2 5 Sample Matrix Spike Run : ICP2-C_11 0225A 02/25/11 13:00 Calcium 730 mg/L 1.1 84 70 130 Iron 4.89 mg/L 0.030 95 70 130 Magnesium 395 mg/L 1.0 96 70 130 Potassium 235 mg/L 1.0 88 70 130 Sodium 582 mg/L 1.4 98 70 130 Sample 10: C11 020352-001 BMSO 5 Sample Matrix Spike Duplicate Run: ICP2-C_11 0225A 02/25/11 13:04 Calcium 731 mg/L 1.1 85 70 130 0.2 20 Iron 4.92 mg/L 0.030 96 70 130 0.7 20 Magnesium 396 mg/L 1.0 96 70 130 0.4 20 Potassium 240 mg/L 1.0 89 70 130 1.9 20 Sodium 580 mg/L 1.4 97 70 130 0.4 20 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 33 of 44 EN:RGY /\\. ..=11."",-",(t{" ..... www.energylab.com ,.",.., DaiIIIIKw SIIIu 1151 Helena, lIlT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 885-186-7175 • Rapid City, SD 188-"2-1225 • College Station, TX 888-&80-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Analyte Count Result Units Method: E200.8 Sample 10: LRB Method Blank Uranium ND mg/L Sample 10: LFB Laboratory Fortified Blank Uranium 0.0518 mglL Sample 10: C11020554-008AMS4 Sample Matrix Spike Uranium 0.336 mglL Sample 10: C11020554-008AMSO Sample Matrix Spike Duplicate Uranium 0.336 mg/L Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. RL 1E-05 0.00030 0.00030 0.00030 Report Date: 03/24/11 Work Order: C11020544 %REC Low Limit High Limit RPO RPOLimit Qual Batch: R142938 Run: ICPMS2-C_110218A 02/18/11 13 :58 Run: ICPMS2-C_110218A 02/18/11 14:02 104 85 115 Run: ICPMS2-C_110218A 02/18/11 22:51 70 130 A Run: ICPMS2-C_110218A 02/18/11 22 :55 70 130 0.1 20 A 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 34 of 44 EN:RGY ..... 1)' "'>I l" 1'_' /' _ " www.energylab.com AMIyIkttI EIuIIe&. SIru 1151 Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 8&&-186-7175 • Rapid City, SO 888-672-1225 • College Station, IX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Analyte Count Method: E200.8 Result Sample 10: LRB 18 Method Blank Arsenic 0.0002 Beryllium 0.00010 Cadmium 6E-05 Chromium NO Cobalt NO Copper NO Lead NO Manganese NO Mercury NO Molybdenum NO Nickel NO Selenium 0.0009 Silver NO Thallium NO Tin NO Uranium NO Vanadium NO Zinc NO 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 mg/L Sample 10: LFB 18 Laboratory Fortified Blank Arsenic 0.0536 mg/L Beryllium 0.0542 mg/L Cadmium 0.0543 mg/L Chromium 0.0553 mg/L Cobalt 0.0555 mg/L Copper 0.0532 mg/L Lead 0.0554 mg/L Manganese 0.0552 mg/L Mercury 0.00548 mg/L Molybdenum 0.0541 mg/L Nickel 0.0532 mg/L Selenium 0.0537 mg/L Silver 0.0198 mg/L Thallium 0.0548 mg/L Tin 0.0544 mg/L Uranium 0.0541 mg/L Vanadium 0.0548 mg/L Zinc 0.0549 mg/L Sample 10: C11020544-002BMS4 18 Sample Matrix Spike Arsenic 0.0541 mg/L Beryllium 0.0436 mg/L Cadmium 0.0492 mg/L Chromium 0.0550 mg/L Cobalt 0.0546 mg/L Qualifiers: RL -Analyte reporting limit. MOC -Minimum detectable concentration Report Date: 03/24/11 Work Order: C11020544 RL %REC Low Limit High Limit RPO RPOLimit Qual 6E-05 3E-05 1E-05 4E-05 2E-05 7E-05 3E-05 5E-05 8E-05 5E-05 0.0007 0.0002 3E-05 1E-05 6E-05 1E-05 3E-05 0.0003 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.00030 0.0010 0.0010 0.0010 0.010 0.010 0.050 0.010 107 108 108 111 111 106 111 110 110 108 106 106 99 110 109 108 109 110 107 87 96 108 100 Run: ICPMS2-C_110222A Run: ICPMS2-C_11 0222A 85 115 85 115 85 115 85 115 85 115 85 115 85 115 85 115 85 115 85 115 85 115 85 115 85 115 85 115 85 115 85 115 85 115 85 115 Run: ICPMS2-C_11 0222A 70 130 70 130 70 130 70 130 70 130 NO -Not detected at the reporting limit. Batch: R142961 02/22/11 14:05 02/22/11 14:12 02/23/11 02:26 Page 35 of 44 EI\ERGY '1 .. (Jjl.',lt.I-,i1 " www.entrgylab.com AM/yIkM~SIIru ,m Helena, JIlT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 881-235-0515 Gillette, WY 8&&-188-7175 • Rapid City, SD 188-&72-1225 • College Slation, TJ( 881-&90-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Analyte Count Method: E200.8 Result Units Sample 10: C11020544-002BMS4 18 Sample Matrix Spike Copper 0.0524 mg/L Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc 0.0537 mg/L 0.215 0.00534 0.0552 0.0632 0.0945 0.0138 0.0550 mg/L mg/L mg/L mg/L mg/L mg/L mg/L 0.0505 mg/L 0.0761 mg/L 0.0555 mg/L 0.121 mg/L Sample 10: C11020544-002BMSO 18 Sample Matrix Spike Duplicate Arsenic 0.0522 mg/L Beryllium 0.0439 mg/L Cadmium 0.0479 mg/L Chromium 0.0509 mg/L Cobalt 0.0509 mg/L Copper Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc Sample 10: C11020544-014BMS4 Arsenic Beryllium Cadmium Chromium Cobalt Copper Lead Manganese Mercury Molybdenum Qualifiers: RL -Analyte reporting limit. 0.0502 mg/L 0.0530 mg/L 0.200 mg/L 0.00520 mglL 0.0521 mg/L 0.0612 mg/L 0.0923 mg/L 0.0140 mg/L 0.0547 mg/L 0.0494 mg/L 0.0738 mg/L 0.0517 mg/L 0.116 mg/L 18 Sample Matrix Spike 0.0529 mg/L 0.0508 mg/L 0.0510 mg/L 0.0494 mg/L 0.0497 mg/L 0.0516 mg/L 0.0521 mg/L 0.0514 mg/L 0.00525 mglL 0.0456 mg/L MDC -Minimum detectable concentration Report Date: 03/24/11 Work Order: C11020544 RL %REC Low Limit High Limit 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 0.050 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 Run: ICPMS2-C_l1 0222A 96 70 130 107 130 107 110 97 108 69 107 101 117 110 95 103 87 94 100 93 92 106 100 104 104 93 104 70 107 99 113 102 84 105 102 102 99 98 103 104 99 105 91 70 70 70 70 70 70 70 70 70 70 70 70 130 130 130 130 130 130 130 130 130 130 130 130 Run: ICPMS2-C_ll 0222A 70 130 70 130 70 130 70 130 70 130 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 Run: ICPMS2-C_l1 0222A 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 ND -Not detected at the reporting limit. S -Spike recovery outside of advisory limits. RPO RPOLlmlt Qual 3.4 0.7 2.6 7.8 6.9 4.1 1.3 7.0 2.6 5.7 3.3 2.3 1.4 0.7 2.1 3.1 7.1 4.5 Batch: R142961 02/23/11 02:26 S 02/23/11 02:33 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 02/23/11 05 :50 Page 36 of 44 EN:RGY /\ I )! ~;~ i '_.l-II •• > www.energylab.com AaI!fkIII EIcdIIa SIIIu 1m Helena, flIT 877-472-0711 • Billings, flIT 800·735-4488 • Casper, WY 8 .... 235-D515 Gillette, WY 88S·I86· 7175 • Rapid City, SD 888-672·1225 • College Station, TX 88"'SBD-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 03/24/11 Project: 1 st Quarter Groundwater 2011 Work Order: C11020544 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: E200.8 Batch: R142961 Sample 10: C11020544·014BMS4 18 Sample Matrix Spike Run: ICPMS2-C_"0222A 02/23/11 05:50 Nickel 0.0517 mg/L 0.050 103 70 130 Selenium 0.0522 mg/L 0.0010 104 70 130 Silver 0.0166 mg/L 0.010 83 70 130 Thallium 0.0500 mg/L 0.0010 100 70 130 Tin 0.0420 mg/L 0.0010 84 70 130 Uranium 0.0500 mg/L 0.00030 100 70 130 Vanadium 0.0505 mg/L 0.0010 101 70 130 Zinc 0.0546 mg/L 0.010 104 70 130 Sample 10: C11020544·014BMSO 18 Sample Matrix Spike Duplicate Run: ICPMS2-C_"0222A 02/23/11 05:57 Arsenic 0.0529 mg/L 0.0010 105 70 130 0.0 20 Beryllium 0.0512 mg/L 0.010 102 70 130 0.6 20 Cadmium 0.0512 mg/L 0.010 102 70 130 0.4 20 Chromium 0.0495 mg/L 0.0010 99 70 130 0.3 20 Cobalt 0.0492 mg/L 0.010 97 70 130 1.0 20 Copper 0.0506 mg/L 0.010 101 70 130 2.0 20 Lead 0.0520 mg/L 0.050 104 70 130 0.2 20 Manganese 0.0514 mg/L 0.010 99 70 130 0.0 20 Mercury 0.00521 mg/L 0.0010 104 70 130 0.7 20 Molybdenum 0.0469 mg/L 0.0010 94 70 130 2.7 20 Nickel 0.0515 mg/L 0.050 103 70 130 0.4 20 Selenium 0.0522 mg/L 0.0010 104 70 130 0.0 20 Silver 0.0172 mg/L 0.010 86 70 130 3.9 20 Thallium 0.0500 mg/L 0.0010 100 70 130 0.0 20 Tin 0.0435 mg/L 0.0010 87 70 130 3.4 20 Uranium 0.0500 mg/L 0.00030 100 70 130 0.1 20 Vanadium 0.0508 mg/L 0.0010 101 70 130 0.5 20 Zinc 0.0532 mg/L 0.010 102 70 130 2.6 20 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 37 of 44 EI\ERGY .,\!,r 'I :,.! II:,"..J www.energylab.com IM/ftat E.ratIIIaI Sitru 'IU Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-1515 Gillette, WY 88&-188-7175 • Rapid City, SD 888-872-1225 • CDllege Station, 1X 888-&80-221 B QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 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: C11020544-0140MS Nitrogen, Nitrate+Nitrite as N Sample 10: C11020544-0140MSO Nitrogen, Nitrate+Nitrite as N Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mglL Laboratory Control Sample 2.34 mg/L Sample Matrix Spike 2.18 mg/L Sample Matrix Spike Duplicate 2.15 mg/L Report Date: Work Order: RL %REC Low limit High Limit RPO Run: TECHNICON_110223A 0.06 Run: TECHNICON_110223A 0.10 94 90 110 Run: TECHNICON_11 0223A 0.10 102 90 110 Run: TECHNICON_11 0223A 0.10 101 90 110 1.4 ND -Not detected at the reporting limit. 03/24/11 C11020544 RPOLimit Qual Batch: R143012 02/23/11 12:07 02123/11 12:09 02123/11 13:02 02/23/11 13:04 10 Page 38 of 44 EN:RGY ,., '1 1,\ I LJI-JII '. www.energylab.com AM/ffIcII ~ SIIIu IISI Helene, MT 877·472-0711 • Billings, MT 800·735-4481 • Casper, WY 818-235-D515 Gillette, WY 881-188·7175 • Rapid City, SD 188·672·1225 • College Station, lX 888-6111-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: 1 st Quarter Groundwater 2011 Analyte Count Result Units Method: E900.l Sample 10: MB·GA·0399 Gross Alpha minus Rn & U 3 Method Blank Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC Sample 10: LCS·GA·0399 Gross Alpha minus Rn & U Sample 10: Cl1020544·001AMS Gross Alpha minus Rn & U Sample 10: Cll 020544-001 AMSO Gross Alpha minus Rn & U Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration -0.08 pCi/L 0.06 pCilL 0.1 pCilL Laboratory Control Sample 11.1 pCilL Sample Matrix Spike 22.3 pCilL Sample Matrix Spike Duplicate 20.8 pC ilL Report Date: 03/24/11 Work Order: Cll020544 RL %REC Low Limit High limit Run: G542M_110223B Run: G542M_ll0223B 106 70 130 Run: G542M_l10223B 100 70 130 Run: G542M_110223B 93 70 130 ND -Not detected at the reporting limit. RPO RPOLlmlt Qual 7.2 Batch: GA-0399 03/02111 18:26 U 03/02/11 18:26 03/02/11 18:26 03/02/11 18:26 16.5 U -Not detected at minimum detectable concentration Page 39 of 44 EN:RGY ,,\ \ ':J I ~ I' t <-~ I {I_ '. www.energylab.com ~~smc.'15Z Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, W'f 888-235-0515 Gillette, W'f 868-686-7175 . Rapid City, SD 888-&72-1225 • College Sialion, TX 888-&80-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 03/24/11 Project: 1 st Quarter Groundwater 2011 Work Order: C11020544 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: SW8260B Batch: R143126 Sample 10: 2S-Feb-11_LCS3 16 Laboratory Control Sample Run: 5975VOC1_110225B 02/25/11 15:01 Acetone 89 ug/L 20 89 70 130 Benzene 12 ug/L 1.0 123 70 130 Carbon tetrachloride 11 ug/L 1.0 108 70 130 Chloroform 10 ug/L 1.0 104 70 130 Chloromethane 11 ug/L 1.0 108 70 130 m+p-Xylenes 21 ug/L 1.0 106 70 130 Methyl ethyl ketone 90 ug/L 20 90 70 130 Methylene chloride 9.6 ug/L 1.0 96 70 130 Naphthalene 10 ug/L 1.0 100 70 130 o-Xylene 10 ug/L 1.0 105 70 130 Toluene 11 ug/L 1.0 110 70 130 Xylenes, Total 32 ug/L 1.0 106 70 130 Surr: 1,2-Dichlorobenzene-d4 fo 94 80 120 Surr: Dibromofluoromethane 1.0 90 70 130 Surr: p-Bromofluorobenzene 1.0 98 80 130 Surr: Toluene-d8 1.0 92 80 120 Sample 10: 2S-Feb-11_MBLK_6 16 Method Blank Run: 5975VOC1 _110225B 02/25/11 16:12 Acetone ND ug/L 20 Benzene ND ug/L 1.0 Carbon tetrachloride ND ug/L 1.0 Chloroform ND ug/L 1.0 Chloromethane ND ug/L 1.0 m+p-Xylenes ND ug/L 1.0 Methyl ethyl ketone ND ug/L 20 Methylene chloride ND ug/L 1.0 Naphthalene ND ug/L 1.0 o-Xylene ND ug/L 1.0 Toluene ND ug/L 1.0 Xylenes, Total ND ug/L 1.0 Surr: 1,2-Dichlorobenzene-d4 1.0 108 80 120 Surr: Dibromofluoromethane 1.0 99 70 130 Surr: p-Bromofluorobenzene 1.0 106 80 120 Surr: Toluene-d8 1.0 83 80 120 Sample 10: C11020S40-01SCMS 16 Sample Matrix Spike Run: 5975VOC1 -110225B 02/25/11 21 :32 Acetone 110000 ug/L 20000 112 70 130 Benzene 13000 ug/L 1000 127 70 130 Carbon tetrachloride 12000 ug/L 1000 122 70 130 Chloroform 18000 ug/L 1000 127 70 130 Chloromethane 12000 ug/L 1000 117 70 130 m+p-Xylenes 21000 ug/L 1000 106 70 130 Methyl ethyl ketone 110000 ug/L 20000 114 70 130 Methylene chloride 11000 ug/L 1000 108 70 130 Naphthalene 9400 ug/L 1000 94 70 130 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 40 of 44 EN:RGY ,,\ JI .. ,.I-j{1 ". www.energylab.com AMIytJm~s.u llU Helena, MT 877-472-0711 -Billings, MT 800·735·4481 -Casper, WY 888·235-0515 Gillette, WY 8&&·188·7175 -Rapid City, so 888·672·1225 -College Station, IX 888-680·2218 OA/oe Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 03/24/11 Project: 1 st Quarter Groundwater 2011 Work Order: C11020544 Ana lyle Count Result Units RL %REC Low Limit High limit RPO RPOLimlt Qual Method: SW8260B Batch: R143126 Sample 10: C11020540·015CMS 16 Sample Matrix Spike Run: 5975VOC1_11 0225B 02125/11 21 :32 o-Xylene 11000 ug/L 1000 106 70 130 Toluene 11000 ug/L 1000 109 70 130 Xylenes, Total 32000 ug/L 1000 106 70 130 Surr: 1,2-Dichlorobenzene-d4 1.0 97 BO 120 Surr: Dibromofluoromethane 1.0 104 70 130 Surr: p-Bromofluorobenzene 1.0 97 BO 120 Surr: Toluene-dB 1.0 93 BO 120 Sample 10: C11020540·015CMSO 16 Sample Matrix Spike Duplicate Run: 5975VOC1 _110225B 02/25/11 22:0B Acetone 110000 ug/L 20000 114 70 130 1.1 20 Benzene 12000 ug/L 1000 124 70 130 1.9 20 Carbon tetrachloride 12000 ug/L 1000 115 70 130 5.7 20 Chloroform 17000 ug/L 1000 11B 70 130 5.1 20 Chloromethane 12000 ug/L 1000 115 70 130 1.7 20 m+p-Xylenes 21000 ug/L 1000 103 70 130 2.9 20 Methyl ethyl ketone 120000 ug/L 20000 120 70 130 4.4 20 Methylene chloride 11000 ug/L 1000 106 70 130 1.9 20 Naphthalene 11000 ug/L 1000 112 70 130 1B 20 o-Xylene 10000 ug/L 1000 103 70 130 2.7 20 Toluene 11000 ug/L 1000 107 70 130 1.B 20 Xylenes, Total 31000 ug/L 1000 103 70 130 2.B 20 Surr: 1,2-Dichlorobenzene-d4 1.0 99 BO 120 0.0 10 Surr: Dibromofluoromethane 1.0 102 70 130 0.0 10 Surr: p-Bromofluorobenzene 1.0 100 BO 120 0.0 10 Surr: Toluene-dB 1.0 92 BO 120 0.0 10 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 41 of 44 EN:RGY I • 'ul ,\!'. 1<11 ..... www.energylab.com AIII/fIIaI buI/eIa J'/la 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4488 • Cuper, WY 888-235-0515 Gillette, WY 188-888-7175 • Rapid City, SD 818-872-1225 • College Station, IX 811-681-2218 Workorder Receipt Checklist Denison Mines USA Corp I ~II~ II~ IIII~ IIIIII~ 111111111111111 ~IIIIII C11020544 Login completed by: Edith McPike Reviewed by: BL2000\kschroeder Reviewed Date: 2/23/2011 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 containerlbottle? 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 III Yes III Yes D Yes III Yes III Yes III Yes 0 Yes III Yes III Yes III 2"C On Ice Yes III Yes 0 Date Received: 2/18/2011 Received by: ha Carrier name: FedEx No D No D 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 III No VOA vials submitted 0 Not Applicable 0 Page 42 of 44 "'0 Q) to CD .j:>. VJ o -.j:>. .j:>. Chain of Custody and Analytical Request Record page_'_of ~ lugrr-e-y &!IZ-ZIIU-mg, PLEASE PRINT iProvlde as much information as po.ssible.) Company Name: M;n~). Project Name, PWS. Permit, Etc. Sample Origin EPA/State Compliance: De.,,;.so,", I!:.I Q"'CAr+~·r G-rGIJ.(\v\ Wlk +~r ;tc II State: lAI Yes Er No 0 Report Mail Address: f'o Bu){ ~CA Contact Name: Phone/Fax: Email: Sampler: (Please Print) ~ \ Cl.t\~', ~ ~\ KLlbH ~~"(\ ?"'"' r'Y' e,l Y3~ b78'.;2221 "";"I1t'.f'" Hcll,dqt- Invoice Address: Invoice Contact & Phone: Purchase Order: Quote/Bottle Order: ~1I\.rY\-C ~o.fV'-(' Special ReporVFormats: 15 [W!l&11S7@D@ [rum:®QJJ~'D'rn[ID ... Contact Ell prior to ~~ iii RUSH sample submittal ~o ",L: I=" for charges and Cooler 10(s): ~a:l;gOI (j; 0 ~ R scheduling -See c.~ ._> 0 >-ro ~ o OW 0 EOD/EOT(Electronic Data) ~(f)~l)l5: () W Instruction Page 03:=a ~ C7) 3" I -0 ReCVI lit T em II o POTWIWWTP Format: U ot: ~ .:5 (J t: Comments: ...... <C (/)1001:;;;;: :::::J U 1. o State: 0 LEVEL IV o ~ t: -~ ~ e °c r.... o;~ C·i:: ~~ \l co ~~12° ... ~~ ~ c: o Other: 0 NELAC -"-On Ice: GN EI-~ ~ <t: Q,I ~ « :::::J ::J 11).= Q) ~ 'c -::j f-5 z Ci<Cllir° ~ ... 'G ~ q} r w 'E Custody Seal lij >1 · ::1 V ,/) 'l:; ~ ~ W I'D On Bottle Y N J~ ..tl .~ :s rJ) -0 (!)N (/) . -1"" ~ ::t 1/ . -c: On Cooler 0 .:J I\J 1!! ~ d .... :1 ~ (/) H Intact C 'N SAMPLE IDENTIFICATION Collection Collection ~ Vl u: J'l a ~ (Name, Location, Interval. etc.) Date Time MATRIX r Signature C\N Match 1 l-w )iw :l ;;).. .. ,1.\.).tJ \ \ 0<.(1.\0 x. ~. 2 MvJ '3 ~-p;.~01\ rc3:, ~-W " -;... ~ 3 Mw '3A :;l.-\6,~O I\ 1CC"-l 'J--vJ J.. 1-~ IQ) nnn 4 }!vJ ~ i2.-\I.\-::tell 13:l.0 1-vJ 'r.. m 5 Mw I~ Q..-)1:)·~Oil tl1.50 I-w 1-~ 6 "" W ) ~ IY'1C :).-vJ Ii '" 1)( ~ 'l-\~_)..O\I 7 MW;2$ ~.lLj -:lDtl IId.Cl \-w 'A l?5! ~ e J!..W '}...O k;l-lb -,g.o II ICI1~ b-W /<-~ 0 9 MW~b ~-1G.-~\;)\1 l.l~~ b-W )<. ~~ 10 Mw 3Y "-1 ~ -:;2.u 1\ OK30 b-vJ x 1. 'fI/J~A5~'-I Custody RelinqUIShed by (print): OatelTlme: -f!laY7:/ RecclVed by (print): Oatefrrme. SIgnature: Record rrQ..t'I~p(· ~Ir\lll'" ~Ii /."'01 I I \~ .::JtlANA.' A RelinquiShed by (print)() Oal.efTimo: Signature: --;;;:;;:] Received by (pnnt). DatefTim&; Signature: MUST be Signed R_vei:lby LabOr.IIlory: i SleJ ,n-'\l ~ ~;ec~ Sample Dlsoosal: Return to Client: lab Disposal: ·l~,: W 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. "U III (C CD .j:>. .j:>. o -.j:>. .j:>. Chain of Custody and Analytical Request Record . ' Page ~ of~ ,ql(f(e-y MMr:t.fiz ••• Ji»a. --.. -.......... . ._-------------.... _ .... _ .. _ .. --"' .. __ ._._., Company Name: jvt;ne..~ Project Name, PWS, Permit, Etc. I Sample Origin EPNState Compliance: I De.f1 l,Sen p.T QUoHt-e. C-r-O\A.l'\J. ~e..te.r ~CII I State: ~ Yes Er No 0 Report Mail Address: Pc ~O)! 8'o~ Contact Name: Phone/Fax: Email: Sampler: (Please Print) ~ '~nJ-; nu., v-'T g ~\f. it \<.~c-..~ PGl.i(n~f '-i3'S b 7'6 .;l..~-;:t. \ J:"1'\r1~'-J+,di ,'jlj-Y Invoice Address: ......., Invoice Contact & Phone: Purchase Order: Quote/Bottle Order: SJ..\"'\<' ~""< Special ReporVFormats: s: ~W®D@ OO~®(!D~@:@ .. Contact ELI prior to ~~ 0 Q) RUSH sample submittal ~o U),C for charges and Cooler ID(s): :gcogOI Q) () Cl !;t R scheduling -See ~ --> 0 >.11; UJ t:. Instruction Page DDW D EDD/EDT(Electronic Data) fI(I) en o:! s: ::r I:: <;, U) :::I: 0s:= ~ C) -3 "0 ReceiptTemp D POTWNVWTP () I:: Comments: Format: u 00<= :::J U _<cenlliSl~ 0 <t: 0 "L D State: o LEVEL IV ° ~ c: ~ °c •• Q) c: .~ I-m o Other: D NELAC ~ ~1ti.QO # l-t: Q)N ~11ti ' <t: 5 On Ice: :::J 0).':= (D s: .~ ~ l-S zo.<ClljllO 4J W "0 Custody Seal E >1 ~ UJ ~ c$ !II On Bottle Y N <tI V) en "0 (I) 5 =; I:: ~-ff: 0 ? -::r [} ,g H Intact N en SAMPLE IDENTIFICATION Collection Collection MATRIX Jl r Signature ,-~ N (Name, Location. Interval. etc.) Date Time Match , /'J.VJ ~S ~'l S ~).C-1\ );1..,-\u 6-W 'f ~ 2 Mw Ie ~-1!:,-;l.O'1 l,-\"-\C t~-\J 'f.. 'I--..,.. ~ 3 M~v be. '?'-Ib -JoG 11 \"3CO 6-W X ~ !nn~ 4 J'.-\ \~ ~SR ~-\L1.?'.cl) c~c ~-vJ y.. ~ 5 -r;.~ B\Ar\k ~1. d--\'-\-;101\ = ~ 6 -r~-D ~'\c'u\,<-~ 7 , , Ie ~ 8 ~ 0 9 a'il ~ .,1 10 ~~~t1Sf/tr Custody Relinquished by (pri;l OatolTme: _ -...A I\J\I .'( S\gl1')I:.L./t Recewed by (prtri); Oalamme' Sillnalum: l---r:tlfIff Holl' la :l1l1/;:!.O11 1I'3.£) Record Relinquished by (print): 0 Oatel1ime: Signature: Received by (print): DatelT1me: Signature: MUST be Signed ftecel""a DyL:ii"l)orawry: 1.'~ ~-{ l "10 .\.. .. r~e.'i l.1V'-SamQle Disposal: Return to Client: Lao Disposal: In certain circumstances, samples suomitted to Energy Laooratories, 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 addilional information, downloadable fee schedule, forms, and links. TabF Laboratory Analytical Reports -Accelerated Monitoring TabFl Laboratory Analytical Reports -Accelerated Monitoring January 2011 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: Denison Mines Project: January Monthly Lab Sample ID: l101179-00lA Client Sample ID: MW-11 Collection Date: 111112011 1200h Received Date: 1113/2011 1010h Analytical Results Analyzed: 1/17/20112034h Units: Ilg/L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr:4-BroD1ofluorobenzene Surr: DibroD1ofluoroD1ethane Surr: Toluene-d8 Contact: Jo Ann Tischler Metbod: SW8260C VOAs by GCIMS 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 80-123 104 1868-53-7 80-124 101 2037-26-5 80-125 100 Report Date: 1120/2011 Page 4 of1S All analyses applicable to the CW A. SDWA. and RCRA are perfonned in accordance to NELAC prolocols. Pertinenl sampling infonnalion is located on the attached COCo This report is provided for the exclusive use of lhe addressee. Privileges of subsequent usc of lhe name of this company or any member of its staff, or reproduction of this report in connection with the advertisementl promotion or sale of any product or process, or in connectlon with the ,,::public~lion.of th~s .report. for a~y pUl],OS. olher than for the addressee will be granled only on contac!. This company aceepls no responsibility excepl for the due performance of inspeclion andlor analysis in good faith EN:RGY .' 1\1 !On AI OHIt s www.energylab.com ~ Exu/Ifta SIIIu 1151 Helena, MT 877-472-0711 -Billings, MT BOD-735-4481 -Casper, WY BB8-235-0515 Gillette, WY 88&-&86-7175 -Rapid Ci1y, SD 188-672-1225 -Collage Station, 1X 888-610-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp January Monthly Groundwater C11 01 0389-001 Client Sample 10: MW 11 Analyses Result Units METALS -DISSOLVED Manganese Report Definitions: Al -Analyte reporting limit. QCl -Quality control limit. 121 ug/L Qualifiers RL 10 Report Date: 02/01/11 Collection Date: 01/11/11 12:00 DateReceived: 01/13/11 Matrix: Aqueous MCL! QCL Method Analysis Date I By E200.8 01/20/1118:10/sml MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 3 of 18 EI\ERGY ,_I\L!On .. '\.1 CIHl~' www.energylab.com AMIyIIaf~sr.u 1m Halens, MT 877-472-0111 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 Glllatta, WY 886-186-7175 • Rapid City, SD 888-&72-1225 • Collage Station, 1X 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab ID: Denison Mines USA Corp January Monthly Groundwater C11 01 0389-004 Client Sample ID: MW 25 Analyses METALS -DISSOLVED Uranium Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. Result Units 7.02 ug/l Qualifiers RL 0.30 Report Date: 02/01/11 Collection Date: 01/11/11 12:30 DateReceived: 01/13/11 Matrix: Aqueous MCU QCL Method Analysis Date / By E200.B 01/21/11 23 :30/ sml MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 6 of 18 EN:RGY . /'101 '.o.~'\r(")1 ~n ~.i www.energyiab.com AtuIyIkM~SIItu 1m Helens, MT 877-472-0711 • Billings, MT BOD-735-4489 • Casper, WY 888-235-0515 Gillette, WY 8&&-188-7175 • Rapid City, SO 888-612-1225 • College Station, TX 888-690-221 B LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: January Monthly Groundwater LablD: C11 01 0389-002 Client Sample ID: MW 26 Analyses MAJOR IONS Chloride Nitrogen, Nitrate+Nitrite as N PHYSICAL PROPERTIES Solids, Total Dissolved TDS @ 180 C 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: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result 52 0.2 3100 32.0 ND ND ND 800 ND ND ND ND ND 1.2 101 104 101 100 D -RL increased due to sample matrix. Units mg/l mg/l mg/l 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: 02/01/11 Collection Date: 01/12/11 09:50 DateReceived: 01/13/11 Matrix: Aqueous MCU Qualifiers Rl QCl Method Analysis Date 1 By 1 A4500-CI B 01/17/11 11 :37 IIr 0.1 E353.2 01/14/1116:36/dc 10 A2540 C 01/14/11 16 :03/1mc 0.30 E200.8 01/21/11 23:261 sml 20 SW8260B 01/15/11 03:101 ilr 1.0 SW8260B 01/15/11 03:101 ilr 1.0 SW8260B 01/15/1103:10/ilr D 100 SW8260B 01/15/11 02:331 ilr 1.0 SW8260B 01/15/1103:101 ilr 20 SW8260B 01/15/11 03:101 ilr 1.0 SW8260B 01/15/1103:101 ilr 1.0 SW8260B 01/15/11 03:101 ilr 1.0 SW8260B 01 /15/11 03:101 ilr 1.0 SW8260B 01/15/11 03:101 ilr 80-120 SW8260B 01/15/1103:101 ilr 70-130 SW8260B 01/15/11 03:101 ilr 80-120 SW8260B 01/15/1103:10/ilr 80-120 SW8260B 01/15/1103:101 ilr MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 4 of 18 EN:RGY • l'llOr'tJ\rOrdl ~j www.energylab.com Atul/bIEmn.u:.SIIIu rm Helena, MT 877·472-0711 • Billings, MT 800·735·4489 . Casper, WY 888·235-0515 Gillette, WY 88&·888·7175 . Rapid City, SO 188·&72·1225 • Collage Station, TX 888·690·2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab ID: Denison Mines USA Corp January Monthly Groundwater C11 01 0389-003 Client Sample ID: MW 30 Analyses MAJOR IONS Nitrogen, Nitrate+Nitrite as N METALS· DISSOLVED Selenium Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result 15 36.2 D -RL increased due to sample matrix. Units mg/L ug/L Report Date: 02/01/11 Collection Date: 01/10/1112:10 DateRecelved: 01/13/11 Matrix: Aqueous MCU Qualifiers RL QCL Method Analysis Date I By D E353.2 01/14/11 16:381 dc 5.0 E200.8 01/20/11 18:151 sml MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 5 of 18 I l EI'ERGY ~J\.l~OB/\ICI~lr ~ www.energylab.com ~EmItfta SIIIu '151 Holena, MT 877·472-0711 • Billings, MT BGO·735·4481 • Cosper, WY 888·235·0515 Gillette, WY 8&6-188·7175 • Rapid City, SD 888·&72·1225 • CDllege StatiDn,lX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab ID: Denison Mines USA Corp January Monthly Groundwater Cll 01 0389-005 Client Sample ID: MW 31 Analyses MAJOR IONS Nitrogen, Nitrate+Nitrite as N PHYSICAL PROPERTIES Solids, Total Dissolved TDS @ 180 C Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. Result 19 1240 D -Rl increased due to sample matrix. Units mg/l mg/l Report Date: 02/01/11 Collection Date: 01/10/11 14:30 DateReceived: 01/13/11 Matrix: Aqueous MCll Qualifiers Rl QCl Method Analysis Date 1 By D E353.2 01/14/11 16:481 dc 10 A2540 C 01/14/11 16:04/1mc MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 7 of 18 EN:RGY ~ IFlonJ\fCr·HL!..) www.anergylab.com W/yIIQ/ EluIlMluSblc.,W Helena, MT 877·472·0711 • Billings, MT 800·735·4489 . Casper, WY 888·235·0515 Gillette, WY 866·8B6· 7175 • Rapid City, SD 88B·672·1225 • Collage Station, TX 888·690·2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab ID: Denison Mines USA Corp January Monthly Groundwater C11 01 0389-006 Client Sample ID: MW 65 Analyses METALS· DISSOLVED Uranium Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. Result Units 6.94 ug/L Qualifiers RL 0.30 Report Date: 02/01/11 Collection Date: 01/11/11 12:30 DateRecelved: 01/13/11 Matrix: Aqueous MCL! QCL Method Analysis Date 1 By E200.B 01/21 /11 23:351 sml MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 8 of 18 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@awaI-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines January Monthly 1101179-002A Client Sample ID: Trip Blank Collection Date: 111112011 Received Date: 1113/2011 Analytical Results Analyzed: 1117/2011 2053h Units: ~gIL Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenzene Surr: Dibromofluoromethane Surr: Toluene-d8 1010h Contact: Jo Ann Tischler Method: SW8260C VOAs by GCIMS Method 8260CI5030C CAS Reporting Analytical Number Limit Result Qual 109-99-9 1.00 < 1.00 17060-07-0 77-144 107 460-00-4 80-123 104 1868-53-7 80-124 101 2037-26-5 80-125 99.4 Report Date: 1/20/2011 Page 5 of 15 All analyses applicable to the CW A, SDWA, and RCRA are performed in Dccordsnce to NELAC protocols. Pertinent sDmpling information is located on tbe atlached CDC. Tbis 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 reporl in connection with the advertisement, promotion or sale of any product or process, or in connection wit.h thc r~:public~tion .of th!s .report. for a?y pu'!'osc other than for the addressee will be granted only on contact. This company sccepts no responsibility except for the due performance of inspection andlor anaJysis in good faith EN:RGY .~ ~;'\BO~ll\l OHIl OJ www.energylab.com AMIytIaI EluIftn ShIu 1m Helena, MT 877-472-0711 • Billings, MT 80D-735-4489 • CBsper, WY 888-235-0515 Gillette, WY 886-18&-7175 • Rapid City, SD 818-&72-1225 • College Station, 1X 888-&90-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: LablD: Denison Mines USA Corp January Monthly Groundwater C11 01 0389-007 Client Sample ID: Trip Blank 5515 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 87.0 98.0 94.0 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 80-120 Report Date: 02/01/11 Collection Date: 01/12/11 DateReceived: 01/13/11 Matrix: Aqueous MCL! QCl Method Analysis Date 1 By SW8260B 01/14/1113:18/ilr SW8260B 01/14/11 13:181 ilr SW8260B 01/14/1113:181 ilr SW8260B 01/14/11 13:181 ilr SW8260B 01/14/11 13:181 ilr SW8260B 01/14/11 13:181 ilr SW8260B 01/14/11 13:181 ilr SW8260B 01/14/11 13:181 ilr SW8260B 01/14/11 13:181 ilr SW8260B 01/14/1113:181 ilr SW8260B 01/14/11 13:181 ilr SW8260B 01/14/11 13:181 ilr SW8260B 01/14/11 13:181 ilr SW8260B 01/14/11 13:181 ilr MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 9 of 18 EN:RGY , I\l.lonl\l Of~1l ~ www.energylab.com AIII/yIIaI £IuIIIIJI:I SJ/tu 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4489 . Casper, WY 88B-235-D515 Gilletta, WY 886-186-7175 • Rapid City, SO 888-&72-1225 • CO/laga Station, lX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab ID: Denison Mines USA Corp January Monthly Groundwater C11 01 0389-008 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: 02/01/11 Collection Date: 01/12/11 DateRecelved: 01/13/11 Matrix: Aqueous MCU QCL Method Analysis Date 1 By E170.1 01/13/11 09:151 kbh MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 10 of 18 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 Jose Rocha QA Officer RE: January Monthly Dear Jo Ann Tischler: Lab Set ID: 1101179 American West Analytical Laboratories received 2 sample(s) on 1/13/2011 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 Analytical Laboratories. ou=Quality Assurance Officer, Roc h a ~~~~=joSe@awaHabs.com, Date: 2011.01.20 17:23:02 -07'00' Laboratory Director or designee Report Date: 1120/20 II Page 1 of 15 All analyses applicable La the CW A. SDWA. and RCM arc perfonned in accordance Lo NELAC protocols. Peninent sampling infoon.Lion is located on the .L!ached CDC. This repon is providcd for the exclusive use of the addressee. Privileges of subsequcnl use of the name of lhis company or any member of ils slafT, or reproduction of this report in connection with the advertisement, promotion or sale of any producl or process, or in connection wit.h the r~:public~tion .ofth~s.report. for ~y pu~ose other than for the addressee will be granted only on contact. This company accepts no responsibilily except for the due perfonnancc ofinspeclion 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 1l01179-001A 11 01179-002A SAMPLE SUMMARY Denison Mines January Monthly 1101179 111312011 1010h Client Sample ID MW-11 Trip Blank Contact: Jo Ann Tischler Date Collected Matrix Analysis 111112011 1200h Aqueous VOA by GCfMS Method 111112011 8260C/5030C Aqueous VOA by GCIMS Method 8260C/5030C Report Date: 1/20/2011 Page 2 of 15 All analyses applicable to the CWA. SDWA. and RCRA are pcrfonned in accordance to NELAC protocols. Pertinent sampling infonnation is located on the attached CDC. This report is providcd for the «clusive use of the addressee. Privileges ofsubsequenl use of the name of this company or any member of its starr, OT reproduction orwis report in connection with the advertisement. promotion or sale arany product or process, or in connection wil.h the r,:~public~tion _ofth~s.report. for a~y puryose other than for the addressee will be granted only on contacl. This company accepts no responsibility except for the due performance of ins peeL ion and/or analysis in goad 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 January Monthly 1101179 Project: Lab Set ID: Sample Receipt Information: Date of Receipt: Date(s) of Collection: Sample Condition: C-O-C Discrepancies: Method: Analysis: 1113/2011 111112011 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: 1/20/2011 Page 3 of 15 All .nalyscs applicablc to Ibe CW 1\, SDWA, and RCRA are performed in accordance La NELAC protocols. Pertinent sampling information is located on Lhe 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 wit.h the r~:public~tion .of lh~s ,report. for a~y _puI)l0se 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 A Client: Denison Mines Lab Set ID: 1101179 Project: January Monthly Sample ID Analyte LCS VOC 011711B Tetrahydrofuran LCS VOC 011711B Surr: 1,2-Dichloroethane-d4 LCS VOC 01171lB Surr: 4-Bromofluorobenzene LCS VOC 011711B Surr: Dibromofluoromethane LCS VOC 011711B 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-labs.com C SUMMARY REPORT Contact: Dept: Jo Ann Tischler MSVOA QCType: LCS Amount Original Units Method Result Spiked Amount %REC Limits J.lg/L SW8260C 21.9 20.00 0 109 43-146 %REC SW8260C 53.0 50.00 106 69-132 %REC SW8260C 49,6 50.00 99.2 85-118 %REC SW8260C 51.5 50.00 103 80-120 %REC SW8260C 49.4 50.00 98.8 81-120 Kyle F. Gross Laboratory Director Jose Rocha QAOfficer RPD %RPD Limit Qual Date Analyzed 1117/2011 1937h 1117/2011 1937h 1117/2011 1937h 1117/2011 1937h 1/17/2011 1937b Report Date: 112012011 Page 6 of15 An analyses applicable to the CWA, SOW A. and RCRA are pcrfonncd in accordance 10 NELAC protocols. Pertinent sampling infonnation is located on the attached CDC. 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 advcrtiscmcDl, promotion or sale of any product or process, or in connection with the Tc-publication of this report for any purpose other than for the addrcssce 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: 11 0 1179 Project: January Monthly Sample ID Analyte MB VOC 011711B Tetrahydrofuran MB VOC 011711B Surr: 1,2-Dichloroethane-d4 MB VOC 011711B Surr:4-Bromofluorobenzene MBVOC01171lB Surr: Dibromofluoromethane MBVOC01171lB Surr: Toluene-d8 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Units IlgiL %REC %REC %REC %REC Salt Lake City, vr 84115 (801) 263-8686, Toll Frcc (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 < 1.00 SW8260C 53.5 50.00 107 69-132 SW8260C 51.8 50.00 104 85-118 SW8260C 50.5 50.00 101 80-120 SW8260C 49.8 50.00 99.6 81-120 Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limit Qual Date Analyzed 1/1712011 2015h 1117/2011 2015h 1117/2011 2015h 1117/2011 2015h 1117/2011 2015h Report Date: 112012011 Page 7 of15 An analyses applicable to the CWA, SDWA, and RCRA ar~ performed in accordance to NELAe protocols. Pertinent sampling information is located on the attached CDC. This report is provided for the exclusive usc ofthc 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 repon for any purpose other than for the addressee will bc granted only on contact. This company accepts no responsibility except for the due performance of inspection and/or anwysis in good A Client: Denison Mines Lab Set ID: 11 0 1179 Project: January Monthly Sample ID Analyte l101179-001AMS Tetrahydrofuran 1101179-001AMS SUIT: 1,2-Dichloroethane-d4 1 10 1179-001AMS Surr: 4-Bromotluorobenzene 1101179-001AMS Surr: Dibromotluoromethane l101179-001AMS 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-labs.com QC SUMMARY REPORT Contact: Dept: Jo Ann Tischler MSVOA QC Type: MS Amount Original Units Method Result Spiked Amount %REC Limits I1g/L SW8260C 22-4 20.00 0 112 43-146 %REC SW8260C 53-4 50.00 107 77-144 %REC SW8260C 49.7 50_00 99-4 80-123 %REC SW8260C 50.8 50_00 102 80-124 %REC SW8260C 48.5 50.00 96.9 80-125 Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limit Qual Date Analyzed 111712011 2112h 1117/2011 2112h 1117/2011 2112h 1117/2011 2112h 1117/2011 2112h Report Date: 1120/2011 Page 8 of 15 AU analyses applicable to the CW A, SDW A, 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 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 purposc ather than for thc addressee win be granted only on contact. This company accepts no responsibility except for the due pcrfonnancc of inspection and/or analysis in good A Client: Denison Mines Lab Set ID: 1101179 Project: January Monthly Sample ID Analyte 1101179-00lAMSD Tetrahydrofuran 1101179-001AMSD Surr: 1,2-Dichloroethane-d4 1101179-001AMSD Surr: 4-Bromofluorobenzene 1101179-001AMSD Surr: Dibromofluoromethane 1101179-001AMSD Surr: Toluene-d8 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263-8686. Toll Frce (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: MSD Amount Original Units Method Result Spiked Amount %REC Limits J.lg/L SW8260C 21.9 20.00 0 109 43-146 %REC SW8260C 53.4 50.00 107 77-144 %REC SW8260C 49.6 50.00 99.3 80-123 %REC SW8260C 51.1 50.00 102 80-124 %REC SW8260C 49.2 50.00 98.4 80-125 Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limit Qual 2.53 25 Date Analyzed 111712011 2131h 1117/2011 2131h 1117/2011 2131h 1117/2011 2131h 1117/2011 2131h Report Date: 1120/2011 Page 9 of 15 All analyses applicable to the CWA, SDWA, and RCRA. are performed in accordance to NELAe 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 staff, or reproduction of this report in connection with the advertisement, promotion or sale afany product or process, or in connection with the rc-publication of this report for lUly purpose other than for the addressee will be granted only on contact. This company accepts no rcsponsibility cxcept for the due pcrfonnancc of inspection and/or analysis in good Data Pa th Da ta File Aeq On Operator Sample Mise ALS Vial Quanti tation Report C:\msd e hem\1\DATA \JANll-C\17JANllA\ S52L1791.D 17 J an 2 011 8 :34 pm 11011 79-0Q1A SAMP 5.0ML 10F3 6 Sample Multipli.er: 1 Quant Time : Jan 1& 07 :01 :26 2011 Quant Me thod C:\MSDCHEM\1\METHOD S\AFULLW_27 .M Quant Title VOA Calibration QLa st Update Mon Jan 17 10 :45 :55 2011 Response via I nitial Calibration (QT Revie\oled ) 'Abundance TIC: S52L 1791.D\dala.ms 2100000 2000000 t 2 1900000 c ~ Sl 1800000 'It .t:: 0 ~ ~ ! 1700000 '" I:! ~ Sl 1600000 .t:: "! .>l ~ a "- 1500000 1400000 I:! ~ ! ~ 19 .3 c g .~ e g '" Ii: t: " a <I) 1300000 \Ii 1200000 1100000 1000000 900000 800000 700000 600000 500000 400000 300000 200000 100000 AFULLW_27.M Tue Jan 18 08:47:31 2011 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1 \DATA\JANI1-C\17JAN11A\ S53L1792 .D 17 Jan 2011 8:53 pm 11011 79-002A SAMP 5.0ML 10F3 7 Sample Multiplier: 1 Quant Time: Jan 18 07 :01 :58 2011 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_27 .M Quant Title VOA Calibration QLast Update Mon J an 17 10 :45 :55 2011 Response via I nitial Calibration (QT Reviewed ) ndance bu 22 TIC: S53L 1792~D\data.ms 00000 21 00000 20 00000 V- ~ I!! GO 00000 i:! ~ ~ -~ Jl 00000 ~ ~ 0 ~ I/) ~ I m t ~ 0 00000 <= ~ ~ 19 18 17 ~ 00000 0 E 16 2 1 '" !j 00000 " fJ) i:! 15 .B 2 00000 g Ii: 14 ~ 13 00000 12 00000 11 00000 10 00000 9 00000 0000 fI) J ~ I!! '6 2 00000 E f 2 ~ ~ 3i 0 00000 2 "" '" 80 7 6 0 !i t= " t/} 5 00000 <II 4 00000 3 00000 2 00000 00000 ~ A A • a 'T -.---r-r 2.50 3.bo ~&!Li,oo _1.50 .~ 7.QO.-1.~~.oo~· -> 2.00 5,0!L2:®J.,9Q ~"50 AFULLW_27.M Tue Jan 18 09:15:46 2011 9.bo 910 10~00 10~50 ro 11 .00 11 .50 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via Quantitation Report C:\msdchem\I\DATA\JANII-C\17JANIIA\ S49LCS20.D 17 Jan 2011 7:37 pm LCS VOC 011 711B LCS SEE COVERSHEET FOR ID AND AMOUNTS 3 Sample Multiplier: 1 Jan 17 19:49:30 2011 C:\MSDCHEM\I\METHODS\AFULLW_27.M VOA Calibration Mon Jan 17 10:45:55 2011 Initial Calibration (Not Reviewed) fAbundance 3200000 TIC: S49LCS20.O\data.ms 3000000 ::; a: 2800000 .. "C ~ 2600000 " t' Q) D e ~ u i3 2400000 * ~ 0 ~ !! 2200000 " .2 f2 t: :J en 2000000 8 en 1[ " t' 1800000 Cc 1l~ ~ e" Eo ON :J" 1600000 1400000 :S~ Q) .; E>' f 0'<= " -1ii ~ ~E " c%~ .2l e <1 0 :J u: 0 ., ~ " ... 1200000 1000000 800000 I!! 600000 ~i q ~, " " " .<= .Q .~ -I f£~ 400000 " 8 - " ~ ~~ H~ '" .<= -'" ~~ 1ii ~-E ~ T"ftS4i 0 W o~ 0 E 200000 e "C N m .Q « lme-> 8.00 8.50 9.00 ~.50 10.00 10.50 11 .00 11.50 AFULLW_27.M Tue Jan 18 08:45:12 2011 Report Date: 1/20/2ljf'\gEp'egil120f15 Quantitation Report C:\msdehem\1\DATA\JANII-C\17JANIIA\ S5ILMBLK.D 17 Jan 2011 8:15 pm Data Path Data File Aeq On Operator Sample Mise MB VOC 011 711B MBLK 5. OML ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via 5 Sample Multiplier: 1 Jan 18 07:00:55 2011 C:\MSDCHEM\1\METHODS\AFULLW_27.M VOA Calibration Mon Jan 17 10:45:55 2011 Initial Calibration (QT Reviewed) r. bundance 2100000 TIC: S51LMBLK.D\dala.ms 2000000 1900000 1800000 1700000 1600000 1500000 1400000 1300000 1200000 1100000 1000000 900000 800000 700000 600000 CIl CIl .,; .,; " iij OJ .t:: .t:: 'iii Qi E E! E! .Q 0 -5 :> '5 ~~ E E! .0 is :> 500000 ~ CIl CIl 400000 300000 200000 100000 ,,-,,-,lm,.,,9-,-,,-> __ -=2.00 2.50 7,-OJ .. 00~8.50 9.00 ~.§Q 10.00 10.50 11.00 11.50 AFULLW_27.M Tue Jan 18 08:45:44 2011 Report Date: 1I20I2ij~9%ge413 of 15 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\DATA\JAN11-C\17JAN11A\ S54S1791.D 17 Jan 2011 9:12 pm 11011 79-001AMS MS 5.0ML 20F3 8 Sample Multiplier: 1 Quant Time: Jan 17 21:24:42 2011 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_27.M Quant Title VOA Calibration QLast Update Mon Jan 17 10:45:55 2011 Response via Initial Calibration (Not Reviewed) fA1)undance T1C:S54S1791.0\dala.ms 3200000 3000000 2800000 2600000 2400000 2200000 2000000 1800000 1600000 1400000 1200000 1000000 800000 600000 q :!! ~ ~ Il 400000 Ql c: '" '" Qi >. ~Qi E m 01 0 200000 E e '" 1! Ji ~I ~ jj. I~ j( a: ~r .. 1 ~ ..\I ~ 1 :!! 01 ~ c- oO E O~~~~~~~~~+r~~~t~W+~~~L~~~~~~~~~~~~~~~~~~~~~~~ me-> 2.QQ ~~g 3,00 3.50 4,QO 4.50 5.00 5.,5:2 6.00 6.50 7.00 7.50 8.00 AFULLW_27.M Tue Jan 18 08:46:18 2011 Report Date: 1I20/2ij~9EP"lIgJ.l14 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\JANll-C\17JAN11A\ S55D1 791. D 17 Jan 2011 9:31 pm 11011 79-001AMSD MSD 5.0ML 30F3 9 Sample Multiplier: 1 Jan 17 21:43:38 2011 C:\MSDCHEM\1\METHODS\AFULLW_27.M VOA Calibration Man Jan 17 10:45:55 2011 Initial Calibration (Not Reviewed) TIC: S55D1791 .o\data.ms 3200000 3000000 2800000 2600000 1800000 E g- " N c: Jll £l g u:: ~ 1200000 l'!. Ii ex; Q ~I ., " i c: " i " ~ I" ~!~ c: ~~ 51 '" ~ ~~ u~ .c 1ii £ ro~ ~ 1 E o W 00 E "0 J £l .l2 III im~> __ AFULLW_27.M Tue Jan 18 08:46:51 2011 " <OJ a<: i ~ " ~ CD Jll ~ ~£l ~ .9!~ i~·g '" Ef;" ~ .: fit"l. z "l '" 8 N- American West Analytical Laboratories WORK ORDER Summary Client: Denison Mines Client ID: DEN100 Contact: Jo Ann Tischler Project: January Monthly QC Level: Comments: No Hard Copies (UL). QC 3 & Summary. EDD-CSV. Report THF to 1 flg/L.; SampleID Client Sample ID Collected Date Received Date Date Due Matrix Work Order: 1101179 Page 1 of1 1113/2011 WOType: Project Test Code Sel Storage 1101179-001A 1101179-002A MW-11 Trip Blank 1/1112011 12:00:00 PM 1/13/2011 10:10:00 AM 112712011 Aqueous g260-W ~ VOCFridge 111112011 1127/2011 8260-W ~ VOCFridge 3 Sheet 1 of 1 CHAIN OF CUSTODY f(GII); 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 Pro'ect Sam lers Name nature Tanner Hollida Date Time SampJelO Collected Collected Laboratory Analysis Requested MW 11 1/11/2011 1200 THF Trip Blank 1/11/2011 Please notify Ryan Palmer of Reciept tempature on these samples Immediatelyl Thank you. Relinquished By:(Signature) ::J~J.t Relinquished By:{Signature) DatelTime Receive By:(Signature) 1/1212011 1330 DatelTime ~JtelTime /13 / ~I /U( Samples Were: COC Tape Was: ~hippedBy: LA yJS Present on Outer Package o Hand Delivered wtYes ONo ON/A o Ambient UD~rokeD on Outer p~age W'Chilled 'til Yes 0 No .::rtJ c , Temperature tj.Lj °C Present on Sample Rec. Broken/Leaking DYes ~No ON/A DYes 0 No ~N/A Notes: Unbroken on sa~~e DYes DNo IA Properly Preserved ~Yes DNo DN/A Notes: I Notes: Rec. Within Hold ~Yes ONo Notes: I \ Bome 1\7ne-Preservative All pHs OK Ammonia . pH ~~ ~() COD pH <2 H2SO4 -r--- C""y'anide PH >12 NaOH -I--- Metals pH <2 HN03 ---I-- N02 &N03 pH <2 H2SO4 --r--.. Nutrients pH <2 H2SO4 --.....-. O&G pH<2HCL Phenols pH <2 H2SO4 Sulfide pH> 9NaOH, ZnAC TKN pH <2 H2S04 TOC pH <2 H3P04 TP04 pH <2 H2SO4 TPH pH <2 HCL Procedure: 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 Lab Set ID: ! ( Q I 1/1 Container Type: M W AL Supplied Plastic o A ~ Supplied Clear Glass o A WAL ~plied Amber Glass o A WAL SUP~AlTOC/TOX Vials o Amber 0 Clear eadspace 0 No Headspace o Non A WAL Supplied~tainer Notes: ~ Discrepancies Between Labels and COC Notes: r--... ..................... ........ ........... ............ ............... ~ ~ ~ ~ 1) 2) 3) 4) 5) If sample is not preserved properly list its extension and receiving pH in the appropriate column above Flag COG and notify client for further instructions .6) 7) Place client conversation on COG Samples may be adjusted at client request No. Rec. I DYes .t1'&o /'\ - ) UPS Internet Shipping: Shipment Label UPS Internet Shipping: View/Print Label 1. 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 l:/hipping 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 senf 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&...111212011 EI\ERGY .' _/\!~,,-)II/'\I Gf~IL S www.energyfab.com AiVIyIIaI ~ SIIa IISZ Helena, MT 877-472-0711 • Billings, MT 801-735·4489 • Casper, WY 888-235·0515 Gillette, WY 8&&-18&-7175 • Rapid City, SD 818-112-1225 . College Station,IX 888-&90·2218 ANALYTICAL SUMMARY REPORT February 01, 2011 Denison Mines USA Corp 6425 S Hwy 191 Blanding, UT 84511 Workorder No.: C11 01 0389 Quote ID: C1640 -POC Wells Project Name: January Monthly Groundwater Energy Laboratories, Inc. Casper WY received the following 8 samples for Denison Mines USA Corp on 1/13/2011 for analysis. Sample ID Client Sample ID Collect Date Receive Date Matrix Test C11 01 0389-001 MW 11 . 01/11/11 12:0001/13/11 Aqueous Metals by ICP/ICPMS, Dissolved C11 01 0389-002 MW 26 01/12/11 09:50 01/13/11 Aqueous Metals by ICP/ICPMS, Dissolved Chloride Nitrogen, Nitrate + Nitrite Solids, Total Dissolved SW8260B VOCs, Standard List C11 01 0389-003 MW 30 01/10/11 12:1001/13/11 Aqueous Metals by ICP/ICPMS, Dissolved Nitrogen, Nitrate + Nitrite C11 01 0389-004 MW 25 01 Iii Iii 12 :30 01/13/11 Aqueous Metals by ICP/ICPMS, Dissolved C11 01 0389-005 MW 31 01/10/1114:3001/13/11 Aqueous Nitrogen, Nitrate + Nitrite Solids, Total Dissolved C11 01 0389-006 MW 65 01/11/1112:3001/13/11 Aqueous Metals by ICP/ICPMS, Dissolved C11 01 0389-007 Trip Blank 5515 01/12/11 00:00 01/13/11 Aqueous SW8260B VOCs, Standard List C11 01 0389-008 Temp Blank 01/12/1100:0001/13/11 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 u)c.l~ Reporting Supervisor Digitally signed by Stephanie Waldrop Date: 2011 .02.01 14:30:36 -07:00 Page 1 of 18 www.energylab.com AM/ytkIII~s.u '152 Halena, MT 877-472-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 Gillette WY 866-186-7175 • Ra Id GI SD 888-672-1225 • Colle e Slation lX 888-690-2218 CLIENT: Denison Mines USA Corp Project: January Monthly Groundwater Report Date: 02/01/11 Sample Delivery Group: C11 01 0389 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. 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 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 opportun ity to provide you with this analytical service. For additional information and services visit our web page www.energylab.com. Page 2 of 18 EN:RGY . /\H()fU\I GI"IL~; www.enelgylab.com AIu/fIkII£xu~~'m Helena, tIT 877-472-0711 • BillinRs, tIT 800-739-44B8 • Casper, WY B88-235-D515 Gillette, WY B&&-I86-7175 • Rapid City, SD 888-&72-1229 • ColieRe Station, 1X 888-&80-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: January Monthly Groundwater Analyte Count Result Units Method: A2540 C Sample 10: MBLK1_ Solids, Total Dissolved TDS @ 180 C Method Blank ND mg/L Sample 10: LCS1_ Laboratory Control Sample Solids, Total Dissolved TDS @ 180 C 977 mg/L Sample 10: C11010433-001AMS Sample Matrix Spike Solids, Total Dissolved TDS @ 180 C 2200 mg/L Sample 10: C11010444-008AOUP Sample Duplicate Solids, Total Dissolved TDS @ 180 C 3780 mg/L Qualifiers: RL -Analyte reporting limit. Report Date: 02/01/11 Work Order: C11010389 RL %REC Low limit High Limit RPO RPOLimit Qual Batch: R141971 Run: BAL-1 _110114A 01/14/11 16:03 10 Run: BAL-1 _110114A 01/14/11 16:03 10 98 90 110 Run: BAL-1 110114A 01/14/11 16:06 - 10 102 90 110 Run: BAL-1 110114A 01/14/11 16:08 - 10 0.1 10 ND -Not detected at the reporting limit. Page 11 of 18 EN:RGY 1\·1C.)f'J·"Lr-ll~ ~~ www.energylab.com AMIytIuI EiullMlCI SlIIU tm Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 816-888-7175 . Rapid City, SD 888-812-1225 . College Station, 1X 888-880-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: January Monthly Groundwater Analyte Count Result Units Method: A4500-CI B Sample 10: MBLK9-110117 Chloride Sample 10: C10120868-001AMS Chloride Sample 10: C10120868-001AMSO Chloride Sample 10: LCS35-110117 Chloride Qualifiers: RL -Analyte reporting limit. Method Blank ND mg/L Sample Matrix Spike 46.8 mg/L Sample Matrix Spike Duplicate 46.5 mg/L Laboratory Control Sample 3510 mg/L Report Date: 02/01/11 Work Order: C11 01 0389 RL %REC Low limit High Limit RPD RPDLimit Qual Batch: 110117-CL-TTR-W Run :TITRATION_110117A 01 /17/1111:18 0.5 Run: TITRATION_110117A 1.0 101 90 110 Run: TITRATION_110117A 1.0 100 90 110 Run: TITRATION_110117A 1.0 99 90 110 ND -Not detected at the reporting limit. 0.8 01/17/1112:11 01/17/1112:13 10 01/17/11 12:22 Page 12 of 18 EN:RGY 1\11 lIUd UH1~ ~ www.energylab.com AMIytIaI~smu /1151 Helena, lIfT 877-472-0711 • Billings, MT 800-735-4489 • Caspar, WY 888-235-0515 Gillette, WY 8&&-186-7175 • Rapid City, SD 1188-&72-1225 • College Station, TX 888-&90-2218 QA/Qe Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: January Monthly Groundwater Analyte Count Result Units Method: E200.8 Sample 10: LRB 2 Method Blank Manganese ND mg/L Selenium 0.0002 mg/L Sample 10: LFB 2 Laboratory Fortified Blank Manganese 0.0519 mg/L Selenium 0.0537 mg/L Sample 10: C11010463-001AMS4 2 Sample Matrix Spike Manganese 0.0475 mg/L Selenium 0.0526 mg/L Sample 10: C11010463-001AMSO 2 Sample Matrix Spike Duplicate Manganese 0.0494 mg/L Selenium 0.0583 mg/L Method: E200.8 Sample 10: LRB Method Blank Uranium ND mg/L Sample 10: LFB Laboratory Fortified Blank Uranium 0.0546 mg/L Sample 10: C11010389-006AMS4 Sample Matrix Spike Uranium 0.0645 mg/L Sample 10: C11 01 0389-006AMSO Sample Matrix Spike Duplicate Uranium 0.0690 mg/L Qualifiers: RL -Analyte reporting limit. RL 5E-05 0.0002 0.0010 0.0010 0.010 0.0010 0.010 0.0010 1E-05 0.00030 0.00030 0.00030 Report Date: 02/01/11 Work Order: C 11010389 %REC Low Limit High Limit RPO RPOLImit Qual Batch: R142012 Run: ICPMS2-C_110120A 01/20/11 11 :38 Run: ICPMS2-C_11 0120A 01/20/11 11 :43 104 85 115 107 85 115 Run: ICPMS2-C_11 0120A 01/20/11 17:54 90 70 130 94 70 130 Run: ICPMS2-C_11 0120A 01/20/11 17:59 94 70 130 4.0 20 105 70 130 10 20 Batch: R142056 Run: ICPMS2-C_110121A 01/21/1111:13 Run: ICPMS2-C_11 0121 A 01/21/1111:17 109 85 115 Run: ICPMS2-C_110121A 01/21/11 23:39 115 70 130 Run: ICPMS2-C_11 0121 A 01/21/1123:43 124 70 130 6.6 20 ND -Not detected at the reporting limit. Page 13 of 18 EN:RGY ,\t ..... )1 ./. r 01 ~rt.. ~~ www.energylab.com AMfTtIClI UClu.n" SIn" '1$1 Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 8&&-&8&-7175 • Rapid City, SD 888-&72-1225 • College Station, TJ( 888-680-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 02/01 /11 Project: January Monthly Groundwater Work Order: C11 01 0389 ---- Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimlt Qual Method: E353.2 Batch: R141865 Sample 10: MBLK-1 Method 81ank Run : TECHNICON_11 01148 01 /14/11 16:23 Nitrogen, Nitrate+Nitrite as N ND mg/L 0.04 Sample 10: LCS-2 Laboratory Control Sample Run : TECHNICON_11 01148 01/14/11 16:26 Nitrogen, Nitrate+Nitrite as N 2.28 mg/L 0.10 91 90 110 Sample 10: C11010389-002CMS Sample Matrix Spike Run: TECHNICON_11 01148 01 /14/1116:41 Nitrogen, Nitrate+Nitrite as N 2.20 mg/L 0.10 98 90 110 Sample 10: C11010389-002CMSO Sample Matrix Spike Duplicate Run: TECHNICON_110114B 01/14/11 16:43 Nitrogen, Nitrate+Nitrite as N 2.19 mg/L 0.10 97 90 110 0.5 10 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. Page 14 of 18 EN:RGY , '-.' r ~ " I ( I {[ www.energylab.com AMIytkM Exuu.n&. smc. IW Helena, MT 877 -4 72-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 8&6-&86-7175 • Rapid City, SO 888-612-1225 • College Station, 1X 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: January Monthly Groundwater Analyte Count Result Units Method: SW8260B Sample 10: 011411_LCS3 16 Laboratory Control Sample Acetone 77 ug/L Benzene 9.7 ug/L Carbon tetrachloride 9.2 ug/L Chloroform 9.4 ug/L Chloromethane 9.1 ug/L m+p-Xylenes 21 ug/L Methyl ethyl ketone 84 ug/L Methylene chloride 10 ug/L Naphthalene 9.5 ug/L o-Xylene 10 ug/L Toluene 9.6 ug/L Xylenes, Total 31 ug/L Surr: 1,2-0ichlorobenzene-d4 Surr: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Sample 10: 01141CMBLK_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-d8 Sample 10: C11 01 0404-013AMS 16 Sample Matrix Spike Acetone 880 ug/L Benzene 100 ug/L Carbon tetrachloride 99 ug/L Chloroform 100 ug/L Chloromethane 92 ug/L m+p-Xylenes 220 ug/L Methyl ethyl ketone 900 ug/L Methylene chloride 100 ug/L Naphthalene 110 ug/L Qualifiers: RL -Analyte reporting limit. RL 20 1.0 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 200 10 10 10 10 10 200 10 10 Report Date: 02/01/11 Work Order: C11 01 0389 %REC Low Limit High Limit RPO RPOLimit Qual Batch: R141871 Run: SATURNCA_110114A 01/14/11 10:53 77 70 130 97 70 130 92 70 130 94 70 130 91 70 130 105 70 130 84 70 130 100 70 130 95 70 130 100 70 130 96 70 130 104 70 130 97 80 120 86 70 130 101 80 130 100 80 120 Run: SATURNCA_11 0114A 01/14/11 12:06 97 80 120 87 70 130 101 80 120 94 80 120 Run: SATURNCA_110114A 01/14/11 18:06 88 70 130 100 70 130 99 70 130 102 70 130 92 70 130 111 70 130 90 70 130 102 70 130 108 70 130 NO -Not detected at the reporting limit. Page 150f18 EN:RGY ~'\l l.O I1~· ... I (.H"~ ~. rmr www.energylab.com wfttiul E:rCrl('MI Slnu 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 • ColiegD Station, TX 888-&80-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 02/01/11 Project: January Monthly Groundwater Work Order: C11010389 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: SW8260B Batch: R141871 Sample 10: Cl1010404-013AMS 16 Sample Matrix Spike Run: SATURNCA_ll0114A 01/14/1118:06 a-Xylene 110 ug/L 10 106 70 130 Toluene 100 ug/L 10 101 70 130 Xylenes, Total 330 ug/L 10 109 70 130 Surr: 1,2-Dichlorobenzene-d4 1.0 95 80 120 Surr: Dibromofluoromethane 1.0 92 70 130 Surr: p-Bromofluorobenzene 1.0 104 80 120 Surr: Toluene-d8 1.0 100 80 120 Sample 10: C11010404-013AMSO 16 Sample Matrix Spike Duplicate Run: SATURNCA_ll0114A 01/14/11 18:42 Acetone 890 ug/L 200 89 70 130 1.4 20 Benzene 95 ug/L 10 95 70 130 5.3 20 Carbon tetrachloride 95 ug/L 10 95 70 130 3.7 20 Chloroform 100 ug/L 10 102 70 130 0.0 20 Chloromethane 91 ug/L 10 91 70 130 0.4 20 m+p-Xylenes 210 ug/L 10 104 70 130 6.9 20 Methyl ethyl ketone 920 ug/L 200 92 70 130 1.8 20 Methylene chloride 110 ug/L 10 106 70 130 4.2 20 Naphthalene 110 ug/L 10 110 70 130 2.2 20 o-Xylene 110 ug/L 10 106 70 130 0.4 20 Toluene 98 ug/L 10 98 70 130 3.6 20 Xylenes, Total 320 ug/L 10 105 70 130 4.4 20 Surr: 1,2-Dichlorobenzene-d4 1.0 96 80 120 0.0 10 Surr: Dibromofluoromethane 1.0 94 70 130 0.0 10 Surr: p-Bromofluorobenzene 1.0 102 80 120 0.0 10 Surr: Toluene-d8 1.0 97 80 120 0.0 10 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. Page 16 of 18 EN:RGY LI\UOJII\I G'tIL~ www.energylab.com AIuIytIa/ Emlt.mI $Ita 1152 Heiena, MT 877-472-0711 • Billings, MT 800-735-4489 • Caspsr, WY 888-235-0515 Gillotta, WY 88&-&88-7175 • Rapid City, SD 888-&72-1225 • Collegs Station, TX 888-&80-2218 Workorder Receipt Checklist Denison Mines USA Corp IIIIIIIIIIIIIIIIIIII~ 111111111111111111111111111111111 C11010389 Login completed by: Corinne Wagner Reviewed by: BL2000\hackerman Reviewed Date: 1/14/2011 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" 3°C On Ice Yes 0" Yes 0" Date Received: 1/13/2011 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 Received by: em Carrier name: FedEx Not Present 0 Not Present 0 Not Present 0" No VOA vials submitted 0 Not Applicable 0 Page 17 of 18 Chain of Custody and Analytical Request Record page~Of-L-'4vrlg LA130RA TORIl 5 PLEASE PRINT (Provide as much information as possible.) CompanYN:O Project Name, PWS, Permit, Etc. Sample Origin EPNState Compliance: ... I eN I~CN fl1:v~ :5~V\t.(~"1 izl'tud £1j~tL State: LAr-Yes G-" No 0 Report Mai~ddressB ~ G 7~:~11k.~ ;;;F-;" 222 / Emaii: Sampi€lC (Please Print) .() ~)( 01 ~~r&;/~ i5!CrI1I'I,~c, IA T xJ.f.<::I! Invoice Address: / Involda Contact & Phone: Purchase Order: Quote/Bottle Ordir: _Scr£........t ... ~W'<. Special Report/Formats: $: &OO&[L W®D@ ~®(!D~[§[Q) • Contact ELI prior to ~-lJ&Clr 0 (j) RUSH sample submittal "'O.".s= for charges and COoler 10($): ~oo;:gOI (j) a [ R scheduling -See (!t.ll1t ._> 0 >'m o DW D EDD/EDT(Electronic Data) B CJ) en ro $: W Instruction Page C Ul en J: o$:= ~ C) ~ '0 Receipt Temp o POTWflNWTP Format: U c Comments: ~«~~2~ :::J U 3 °C o State: 0 LEVEL IV o .... 001 c: ~ « e ~ Qj,!g r::: ~~ 1 I-ro o Other: 0 NELAC ~ a.ro 00 ~ ~ l-e W'N E~I16 . ~ On Ice: :J Q).~ iii $: ~ \~ '1 .~ « l-S zc.<CIg'O ~ I ~ w 'E c,~!.. ""'6 0 ~ >1 ~ A UJ (I! en 'C CJ) ~ .~ .~ V1 C On Cooler N i .....: .-:: -~ til ~ -H Intact N -: l,~ 't: lv' en SAMPLE IDENTIFICATION Collection Collection MATRIX ~ ~ .~ ~ ~ Signature N (Name. location. Interval, etc.) Date TIme ( Match 1 IUw 1/ ;'iI-I~ JZ(JO /-w X ~ 2 /Vt.l~) 1 t, 1)'12/11 ~1s/) /'-tJ X X >< X X IX' ~ 3 rrlv\J -:<;0 ll/J·II IZ/(} ~-w )( X . ~ lnrut 4tnw, zc j-1/·11 IJ~{j J-fA) X ~ 5 Y'lltAJ ~.3 f lIb ·JI /f{JO 2·vJ Ix Ix ~ I 6 mw -~5 J.// II LZ30 / -tA..J ~ ~tIlOlo..~1 7 lIZ-,;' i!:ia,d' -7t'SS'I') l::!-~ 8/./ hi: J <::LJ jM P' ~ I , 9 I ro'OJ ~ (Xl 10 ~ Custody Relinquished by fJJ;;'t~: :l.. j~'rn<>:. /330 :\w\J s"Vnaluref, I,~J.~ Rece\ved by (print): Oatef1'ime: Signature: 1Af1"~r /1.: "" . /.1. JI ... lMIt. Record RefinQuishod by (prml~ ~ Datemme' Signature: -Received by (prin/): Oate/Time: Signatu'e: MUST be Signed ~rlOQ ~ 7f2rBfr{ ua" 't"'lM/ !),'f5~ __ "19M u.re: Sample 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.enElfQvlab.com for additional information, downloadable fee schedule. forms. and links. TabF2 Laboratory Analytical Reports -Accelerated Monitoring March 2011 A ORGANIC ANALYTICAL REPORT 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 Client: Project: Lab Sample ID: Denison Mines March Monthly 1103272-001A Client Sample ID: MW-ll Collection Date: 3/15/2011 Received Date: 3117/2011 Analytical Results Analyzed: 3/17/2011 1926h Units: IlgiL Dilution Factor: 1 Compound T etrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr:4-Brornofluorobenzene Surr: Dibrornofluorornethane Surr: Toluene-d8 1155h 1055h Contact: Jo Ann Tischler Method: SW8260C VOAs by GC/MS Method 8260C/5030C CAS Reporting Analytical Number Limit Result Qual 109-99-9 1.00 < 1.00 17060-07-0 77-144 109 460-00-4 80-123 106 1868-53-7 80-124 98.5 2037-26-5 80-125 101 Report Date: 3/21/2011 Page 4 of 15 All analyses applicable to the CWA, SDW A, and ReRA are perfonncd in accordance to NELAC protocols. Pertinent sampling lnfonnation is located on the attached COCo This report is provided for the exclusive usc of the addressee. Privileges ofsubsequcnt use of the name ofthjs company or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or sale of any product OT process, or in connection with the re.pubHcation of this report for any purpose other than for the addressee will be granted only on contact. This company accepts no responsibility ex.cept for the due perfonnance of inspection and/or analysis in good failh and according to the rules of the trade and of science. EN:RGY • /\. ~(;,-I <I tJH t "_ www.energylab.com AIl.r/fllclI ElGfIIMICt $/«, IISI Helena, MT877·472-0711 • Billings, MT 800·735·4489 • Casper, WY 888·235·0515 Gillette, WV 866·&86·7175 • Rapid City, SD 888·672·1225 • College Station, lX 888-690·2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp March Monthly Groundwater Cl1030538-001 Client Sample 10: MW-ll Analyses Result Units METAL$ ·DISSOLVE.D Mangahese Report Definitions: Rl . Analyte reporllng limit. Qel . Quality conlrollimit. 68 uglL Qualifier RL 10 Report Date: 04/14/11 Collection Date: 03/15/11 11 :55 OateRecelved: 03/17/11 Matrix: Aqueous MCL! QCL Method Analysis Date I By E200.8 04/13/11 21 :40 I sm( Mel· MaXimum contamInant level. ND -Not detected at the reporting limit. Page 3 of 20 £:f\J:RGY ,'\ -, )1. ,. )I-t' ' WNW.energylab.com AitIJ1tkII Exullet:tS/fICf 1m Helena, MT 877·472·0711 • Billings. MY 800·735·4489 • Casper. WY 888·235·05111. Gillette, WY 86&-&86-7175 • Rapid Citt. SO 888-672·1225 • College Statlon, TX 888490-2218 LABORATORY ANAL meAL IREPORT Prepar.e(f byCaspe.r, Wy ~raheh Client: Project: Lab 10: Denison Mines USA Corp March Monthly Groundwater Cll030538-002 Client Sample 10: MW-25 Analyses Result Units METALS· D.ISSOl V.EO U,l<inium Report Definitions: RL -Analyte rep0rling limit. QCl -Quality control limit. 6.8 ug/l Qualifier RL 0.3 Report Date: 04/14/11 Collection Date: 03/15/11 12:10 DateReceived: 03/17/11 Matrix: Aqueous MCL! aCL Method Analysis Date I By E200.8 03l23fl1 05:32 / sml MCl -Maximum contaminant level. NO -Not detected at the reporting ilmit. Page 4 of 20 EN:RGY .'LUII;',I Ul~1 " ~.energyI8b.com AIY/JfIt;M m.u-SInu 1m Helena, MT 877-472-0711 • Billings, MT 800-735-4488 • Casper, WY 888-235-0515 Gillette, WY 8&&-186-7175 • Rapid City, SD 888-&12-1225 • College Station, TX 888-&90-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: March Monthly Groundwater Lab 10: C11030538-003 Client Sample 10: MW-26 Analyses MAJOR IONS Chloride Nitrogen, Nitrate+Nitrite as N PHYSICAL PROPERTIES Solids, Total Dissolved TDS@ 1BO C METALS -DISSOLVED Uranium RADIONUCLIDES -DISSOLVED Gross Alpha minus Rn & U Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC 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 64 0.6 3140 31.B 2.7 0.2 0.1 ND ND ND 1200 ND ND 14 ND ND ND 116 12B 110 95.0 Units mg/L mg/L mg/L ug/L pCi/L pC ilL pC ilL ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L %REC %REC %REC %REC MDC -Minimum detectable concentration Report Date: 04/14/11 Collection Date: 03/15/11 12 :40 DateRecelved: 03/17/11 Matrix: Aqueous MCl! Qualifier Rl QCl Method Analysis Date 1 By D 1 A4500-CI B 03/2B/11 11 :5B 1 Ir 0.1 E353.2 03/24/11 14:21 1 dc 10 A2540 C 03/1B/1115:23 1 Imc 0.3 E200.8 03/23/11 05 :361 sml E900.1 04/13/11 22:11 1 ep E900.1 04/13/11 22:11 1 ep E900.1 04/13/11 22 :11 1 ep 20 SWB260B 03/24/11 05 :49 1 jlr 1.0 SWB260B 03/24/11 05 :49 1 jlr 1.0 SWB260B 03/24/11 05:49 1 jlr 100 SWB260B 03/23/11 1 B :35 1 jlr 1.0 SWB260B 03/24/11 05:491 ilr 20 SW8260B 03/24/11 05:491 ilr 1.0 SWB260B 03/24/11 05:49 1 ilr 1.0 SWB260B 03/24/11 05 :49 1 jlr 1.0 SWB260B 03/24/11 05:491 jlr 1.0 SWB260B 03/24/11 05:49 1 ilr BO-120 SWB260B 03/24/11 05:49/ ilr 70-130 SWB260B 03/24/11 05:49/ ilr BO-120 SWB260B 03/24/11 05 :49 / jlr BO-120 SWB260B 03/24/11 05 :49 1 jlr MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 5 of 20 EN:RGY 1'\' .)i-.,\i{ ,"'It' www.energylab.com ~fJ~SIIIc.'SSl Helena, NT 817-472-0711 " BUllngs, MY 800-735 .. 4488 • Casper, WY 888-235-1515 Gillette, WY 866·686·7175 ~ R.pid liliJ, so 888-872-1225 • Colll!iaStatlon, 1X 'IW,D-2211 LABORATO.RY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp March Monthly Groundwater C11030538·004 Client Sample ID: MW-30 Analyses Result Units MAJORrONS Nitrogen, Nitrate+Nitrite as N METALS -DISSOLVED Selenium Report Definitions: Rl· Analyte reporting limit. QCl -Quality control limit. 17 35 D -RL increase.d due to sample matrix. mgll ug/l Report Date: 04/14111 Collection Date: 03/14/11 11 :50 DateRecelved: 03/17/11 Matrix: Aqueous MCU Qualifier RL QCL Method Analysis Dale I By o E3.53.2 03/24/11 14:241 dc 5 E200.8 03123/11 23:391 sml MCl· Maximum contaminant level. ND -Not detected at the reporting limit. Page 6 of 20 EN:RGY 1\ I '. _" ~ ,\ I , J;--l r' "_ WYtW.enefgyleb.eom AiJIIyIIuI bel""" SItHI. /151 Helena, MT 877·472-0711 -81mnllS, MT 800·135-44.8 -Cuper. WV •• 8·235-.515 Gillette, WV 8&B·&86·7175 • !lapld Ctty, SD 888·&72·1225 • College Station, 1X 88 ..... 0-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: LabID: Denison Mines USA Corp March Monthly Groundwater Cll030538-005 Client Sample ID: MW-31 Analyses MAJOR IONS Nitrogen, Nitrate+Nitrite as N Sulfate PHYSICAL PROPERTIES Solids, Total Dissolved TDS @ 180 G Report Definitions: Rl -Analyte reporting limit. QeL -Quality control limit. Result 22 531 1250 D -Rl increased due to sample matrix. Units mg/l mg/L mg/L Report Date: 04/14/11 Collection Date: 03/14/11 14:30 DateRecelved: 03/17/11 Matrix: Aqueous MCU Qualifier Rt aCl Method Analysis Date I By D E353.2 03124/11 14:39 f dc D 10 A4500-S04E 03f21/11 15:27/1r 10 A2540 G 03f18f11 15:23'1 Imc Mel -Maximum contaminant level. ND -Not detected at the reporting limit. Page 7 of 20 EN:RGY 1'\' 1 .H .. ,\I' )1-IlL. " WI'IW.energyleb.com AnI/ftIuI ExulllllCt s.u /151 Helena, MY 877-472-0711 • Billings, MY 800-735-4489 • Casper, W1888-235-0515 GiII'ette, W'( 86&-&86-7175 · Rapid City, SD 888-672-1225 . College Station, lX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepa~d by Cas pel'; WY B.rancl1 Client: Project: Lab 10: Denison Mines USA Corp March Monthly Groundwater Cl1030538-006 Client Sample 10: MW-65 Analyses METALS· OISSOL Y,ED Uranlum Report Definitions: RL -Analyte reporting limit. QCL -Quality con trot limit. Result Units 6.8. ugll Qualifier Rl 0.3 Report Date: 04/14/11 COllection Date: 03/15/11 12:10 DateReceived: 03/17/11 Matrix: Aqueous MCW QCl Method Analysis Date 1 By E200.8 03123/11 05:41 I sml MCl -Maximum contaminant level. NO • NO.1 detected al Ihe reporting limil. Page 8 of 20 A ORGANIC ANALYTICAL REPORT 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 Client: Denison Mines Project: March Monthly Lab Sample ID: 1103272-002A Client Sample ID: Trip Blank Collection Date: 3115/2011 Received Date: 3/1712011 1055h Analytical Results Analyzed: 3/1712011 1945h Units: Jlg/L Dilution Factor: 1 Compound Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Brornofluorobenzene Surr: Dibrornofluorornethane Surr: Toluene-d8 Contact: Jo Ann Tischler Method: SW8260C VOAs by GC/MS Method 8260C/5030C CAS Reporting Analytical Number Limit Result Qual 109-99-9 1.00 < 1.00 17060-07-0 77-144 108 460-00-4 80-123 106 1868-53-7 80-124 98.4 2037-26-5 80-125 101 Report Date: 3/21/2011 Page 5 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 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 rc~publieatioD of this Teport for aoy purpose other than for the addressee will be granted only on eontacL This company accepts no responsibility except for the due performance of inspection andlor analysis in good faith and according to the mles of the trade and of science. EN:RGY ,"I )/.:,I'Jlfl '.> www.energylab.com MI/ftICI/£ruht5muIW Helena, MT 877·472-0711 • Billings, MT 800·735·4488 • Casper, WY 888-235·0515 GiliBita, WY 8&8·18&·7175 • Rapid City, SD 888·&72·1225 • Collage Station, TX 881-&80·2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: LablD: Denison Mines USA Corp March Monthly Groundwater C11030538-007 Client Sample ID: Trip Blank 6029 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 121 100 114 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 S -Spike recovery outside of advisory limits. Report Date: 04/14/11 Collection Date: 03/15/11 DateRecelved: 03/17/11 Matrix: Aqueous MCLt Qualifier Rl QCl Method Analysis Date 1 By 20 SWB260B 03/23/11 17:241 jlr 1.0 SWB260B 03/23/11 17:241 ilr 1.0 SWB260B 03/23/11 17:24 1 jlr 1.0 SWB260B 03/23/11 17:241 ilr 1.0 SWB260B 03/23/11 17:241 ilr 20 SWB260B 03/23/11 17:24 / jlr 1.0 SWB260B 03/23/11 17:241 jlr 1.0 SWB260B 03/23/11 17:24 1 ilr 1.0 SWB260B 03/23/11 17:24 1 ilr 1.0 SW8260B 03/23/11 17:241 ilr S 80-120 SW8260B 03/23/11 17:24 1 ilr 70-130 SW8260B 03/23/11 17 :24 1 ilr 80-120 SW8260B 03/23/11 17:241 jlr 80-120 SW8260B 03/23/11 17:24 1 ilr MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 9 of 20 EMRGY ,\"'-,1. -j 'I-I!' www.energyleb.eom AnItrI/C6I El"",~ SIRu /151 Helene, MT877·472-0711 • 811l1ngs, MT800·735·4489 · Caspar, WY 888-235-0515 Gillette, WY 866·686·7175 • Rapid City, SO 1188·612·1225 • College Stati~n, TX 8811-690-2218 LABORATORY ANALYTICAL REPORT Prepared' by Casper, WV Branch Client: Project: Lab 10: Denison Mines USA Corp March Monthly Groundwater C 11030538-008 Client Sample 10: Temp Blank Analyses PHYSICAL PHOPERTJF;;S Temp~rature Report Definitions: RL • Analyte reporting limit. QCL· Quality conlrol limit. Result Units 3.0 Qualifier RL Report Date: 04/14/11 Collection Date: 03/15/11 DateReceived: 03/17/11 MatriX: Aqueous MCU QCl Method Analysis Date I By E170.1 03117/11 09:00 / kbh MCl -Maximum contaminant level. NO • Not detected at the reporting limit. Page 10 of 20 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: March Monthly Dear Jo Ann Tischler: Lab Set ID: 1103272 American West Analytical Laboratories received 2 sample(s) on 311712011 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 Kyle Gross F . Digitally signed by Kyte F. Gross ON: cn=Kyle F. Gross, o=AWAL, ou=AWAL, email=kyle@awal- labs com, c=US Date: 2011,0321 15:31:49 -06'00' Approved by: 1..-___________ ..... Laboratory Director or designee Report Date: 3/21120 11 Page 1 ofl5 V- Ail analyses applicable to the CWA, SDWA. and RCRA are perfonned in accordance to NELAC protocols. Pertinent sampling infonnation is located on the attached COC~ This report is provided for tbe exclusive use of the addressee. Privileges of subsequent use of tbe name oftbis company or any member of its staff, or reproduction of tbis 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 tban for the addressee will be granted only on contact This company accepts no responsibility except for thc due perfonnance 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 Snit Lake City, UT 84115 (801) 263-8686 Toll Free (888) 263-8686 Fax (80 I )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 1l03272-001A 1103272-002A SAMPLE SUMMARY Deni on Mines Contact: Jo Ann Tischler March Monthly 1103272 31'17/2011 1055h Client Sample ID Date Col1ected Matrix Analysis MW-l1 3/] 5/2011 1155h Aqueou VOA by GCIMS Method 8260CI5030C Trip Blank 311512011 Aqueous VOA by GC/MS Method 8260CI5030C Report Date: 31211201 I Page 2 of 1 5 AJI .""lysct opph.oble 10 Ill< CWfl. SOWA, "nd ReM nn: "",fom,.d in Record, .. ,,, 10 Na,\C prolooolJ. reninenl 50mpling infonn."on is 10<01.<1 On Ihe .u.chod COCo This repurt i. pruvhkd ror .he o.cluoive "'. or.ho a:ddfi:~"'e. Pri\lilcges orsubS4."qutul ~ offlx: nomo orlhiscomp;ny or Dny membc1' ofitJ Stllrr, orruprooucliun .,r'hl~ report in connc:cllDn with the advcrtJscmenl. promucion or 5.1Iic. O(MY prochn:::' or pr~ or in connection wi.h Ihe ""publl""lion orlhi. "'pon {or .ny fIIllJl<l<' orhor Ih:m for Ihe .ddrtoi<:t will be 8mn.ed only on conloOi. TIll> ""mpony .cccpl. no rcspolUlbilhy <.llccp' for rhe dlle ",,"onnonce orillSpection ,"dlor an.lysi. in good r.ilb nod accordl"!> to.he RIles of rho trndc.ntI .f"larco. 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 March Monthly 1103272 Project: Lab SetID: Sample Receipt Information: Date of Receipt: Date(s) of Collection: Sample Condition: C-O-C Discrepancies: Method: Analysis: 3117/2011 3115/2011 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 (MRs): 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 (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: 3/21/2011 Page 3 of15 All analyses applicable to the CWA, SDWA, and ReRA are performed in accordance to NELAC protocols, Pertinent sampling information is located on the attacbed COCo This report is provided for the exclusive use of the addressee. Privileges of subsequent use of the name oftbis company or any member of its staff, or reproduction of this rcport in connection with the advertisement, promotion or sale of any product or process, or in connection with the re-publication oftbis report for any purpose other than for the addressee will be granted only on contact. This company accepts no rcsponsibility except for the due perfonnance ofinspcction andlor Qnalysis in good faith and according to the rules of the trade and ofscicDCC. A Client: Denison ~ines Lab Set ID: 1103272 Project: ~arch~onthly Sample ID Analyte LCS VOC 031711B Tetrahydrofuran LCS VOC 031711B Surr: 1,2-Dich1oroethane-d4 LCS VOC 031711B Surr: 4-Bromofluorobenzene LCS VOC 031711B Surr: Dibromofluoromethane LCS VOC 031711B Surr: To1uene-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.awaJ-labs.com QC SUMMARY REPORT Contact: Dept: Jo Ann Tischler ~SVOA QCType: LCS Amount Original Units Method Result Spiked Amount %REC Limits ~glL SW8260C 17.6 20.00 0 88.2 43-146 %REC SW8260C 53.4 50.00 107 69-132 %REC SW8260C 49.1 50.00 98.2 85-118 %REC SW8260C 49.4 50.00 98.9 80-120 %REC SW8260C 49.0 50.00 98.1 81-120 Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limit Qual Date Analyzed 3117/2011 1810h 3117/2011 1810h 3/17/2011 1810h 3117/2011 1810h 3117/2011 1810h Report Date: 3/2112011 Page 6 of 15 AU analyses DppliCllble 10 the CWA, SDWA, and RCRA arc perfonned in accordance to NELAC protocols. Pertinent SGmpling infonnation is 10000ted on the auached COCo This repon is provided for the exclusive use of !be addressee. Privilegelli of subsequent usc oflhc name oftbis company or any member of its staff, or reproduction afthis repD:'1: £~ conueclion whh the IIdvert4cmmt. ptOmoUOIl 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 inspeclion andlor analysis in good faith tlnd according lO the rules of the trade and oflC~c:rn:c. A Client: Denison Mines Lab Set ID: 1103272 Project: March Monthly Sample ID Analyte MB VOC 031711B Tetrahydrofuran MB VOC 031711B Surr: 1,2-Dichloroethane-d4 MB VOC 03171lB Surr: 4-Bromofluorobenzene MB VOC 031711B Surr: Dibromofluoromethane MB VOC 031711B Surr: Toluene-d8 AMERICAN WEST ANALYTICAL LABORATORIES 463 West 3600 South Units flg/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-Jabs.com. web: www.awal-Iabscom QC SUMMARY REPORT Contact: 10 Ann Tischler MSVOA MBLK Dept: QC Type: Amount Original Method Result Spiked Amount %REC Limits SW8260C < 1.00 SW8260C 53.4 50.00 107 69-132 SWS260C 52.0 50.00 104 S5-IIS SWS260C 48.8 50.00 97.5 SO-120 SW8260C 50.5 50.00 101 81-120 Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limit Qual Date Analyzed 3117/2011 1907h 3/17/2011 1907h 3117/2011 1907h 3117/2011 1907h 3/17/2011 1907h Report Date: 3/2112011 Page 7 of 15 An analyses applicable to the CWA, SDWA, and ReRA are performed in accordance 10 NELAe protocols. Pertinent sampling information is located on the anached COCo This report is provided for the ex-elusive use of the addressee. Privileges of subsequent use of the name of this company or any member of its staff, or reproduction afthis report in connection with the advertisemenl, promotion or sale of any product or process, or in connection witb the fe-publication of this report for any purpose otber than for the addressee witt 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 oCthe trnde and of science. A Client: Denison Mines Lab Set ID: 1103272 Project: March Monthly Sample ID Analyte 1103272-001AMS Tetrahydrofuran l103272-001AMS Surr: 1,2-Dichloroethane-d4 l103272-001AMS Surr: 4-Bromofluorobenzene 1103272-001AMS Surr: Dibromofluoromethane 1103272-001AMS Surr: Toluene-dS AMERICAN WEST ANAL YTICAL LABORATORIES 463 West 3600 South Salt Lake City, UT 84115 (801) 263·8686, Toll Free (888) 263·8686, Fax (801) 263-8687 e-mail: awaJ@awaJ-labs.com. web: www.awaJ-labs.com QC SUMMARY REPORT Contact: Dept: Jo Ann Tischler MSVOA QC Type: MS Amount Original Units Method Result Spiked Amount %REC Limits Ilg/L SWS260C 19.4 20.00 0 97.1 43-146 %REC SWS260C 54.6 50.00 109 77-144 %REC SWS260C 4S.4 50.00 96.S SO-123 %REC SWS260C 50.1 50.00 100 SO-124 %REC SWS260C 49.6 50.00 99.2 SO-125 Kyle F. Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limit Qual Date Analyzed 3/17/2011 2004h 3/17/20 II 2004h 3/17/2011 2004h 3117/20 II 2004h 3/1 7/20 II 2004h Report Date: 3/21/2011 Page 8 ofl5 All analyses applicable to the CWA, SDWA, and ReRA are performed in accord.mee to NELAe prolOcols. Pertinent sampling information is located on the anached COCo This repon is provided fOT the cltclusive use oftbe addressee. Privilegt:s of subsequent use oflhe name arthis 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 with the re·publicntion or this report for any purpose other than for the addressee will be grn.nted only on conLaCl, This company accepts no responsibility except for the due pcrfonnance of inspection imdlor analysis in good faith and according to the rules of lhe trade and of science. A Client: Denison Mines Lab Set ID: 1103272 Project: March Monthly Sample ID Analyte 1103272-00IAMSD Tetrahydrofuran 1103272-00IAMSD Surr: 1,2-Dichloroethane-d4 1103272-001AMSD Surr: 4-Bromofluorobenzene 1103272-001AMSD Surr: Dibromofluoromethane 1103272-001AMSD 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-Iabs.com, web: www.awaJ-labs_com QC SUMMARY REPORT Contact: Dept: Jo Ann Tischler MSVOA QC Type: MSD Amount Original Units Method Result Spiked Amount %REC Limits Ilg/L SW8260C 20.0 20.00 0 99.8 43-146 %REC SW8260C 53.5 50.00 107 77-144 %REC SW8260C 49.3 50.00 98.6 80-123 %REC SW8260C 50.4 50.00 101 80-124 %REC SW8260C 49.0 50.00 97.9 80-125 Kyle F, Gross Laboratory Director Jose Rocha QA Officer RPD %RPD Limit Qual 2.79 25 Date Analyzed 3117/2011 2024h 3117/2011 2024h 3/17/2011 2024h 3117/2011 2024h 3/17/2011 2024h Report Date: 3/21/2011 Page 9 of15 All analyses applicable lO the CWA, SDWA. and RCRA are perfonned in accordance to l\'ELAC 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 of1.bis company or any member ofi1S 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 lhe 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 scietlce. Data Path Data f'ile Acq On Operator Sample Mise JI.!.S Vial Quant Time: Quant Method Ouant Title QLa:'lt Update Response via 1800000 1700000 1600000 '500000 1300000 1200000 1100000 '000000 900000 800000 700000 600000 500000 400000 300000 200000 '00000 Ouan titation Report C:\msdchem\1\OATA\MARIl-C\17MAR11A\ F75L2721 .D 17 Mar 2011 7 :26 pm 1103272-00lA SAMP 5 . OM!, 10F3 37 Sample Multiplier: 1 Mar 18 07:52 :51 2011 C:\MSOCHEM\1\METHODS\AFULLW_30.M VOA Calibration Wed Mar 02 06 :13 :07 2011 Initial Calibration (OT Reviewed) TIC: F75l2721 Dodala.ms I Ii J ,j mmo-> o,~~~~~~~~~~~~~~~~~~~~~~~~~~~ 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 8.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50 10.00 10.50 11.00 11.50 AFUL!.W_30 .M Fri Mar 18 08 :34:29 2011 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via W>undance 190000 0 180000 a 170000 0 1600000 1500000 140000 0 130000 a I 1200000 1100000 1000000 900000 800000 700000 600000 500000 400000 300000 200000 100000 Quantitation Report C:\msdehem\l\DATA\MARll-C\l7MARllA\ F76L2722.D 17 Mar 2011 7:45 pm 1l03272-002A SAMP 5.0ML 10F3 38 Sample Multiplier: 1 Mar 18 07:53:18 2011 C:\MSDCHEM\1\METHODS\AFULLW_30.M VOA Calibration Wed Mar 02 06:13:07 2011 Initial Calibration (QT Reviewed) TIC: F76L2722.D\data.ms -i c!> c: ~ ~ :l1 ~ i3 -t S ~ en !f 1 ~ " .c !'! t! g " '5 ~ E !'! <D !'! g " u: en ~ q " q c: .. i!! li i E !'! g g 15 {i E 0 !'! "t J2 0 5 5 en <1l o i A It IA , I I , I 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 6.(30 7.00 7.50 8.00 8.50 9.00 9.50 10.00 10.50 11 .00 11 .50 I AFULLW_3 0.M Fri Mar 18 08:34:40 2011 Report Date: 3/21/2ijl:ljgE¥age'l11 ofl5 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via Quantitation Report C:\msdchem\1\DATA\MARII-C\17MAR11A\ F7lLCS20 .D 17 Mar 2011 6:10 pm LCS VOC 031711B LCS SEE COVERSHEET FOR ID AND AMOUNTS 34 Sample Multiplier: 1 Mar 17 21:20:29 2011 C:\MSDCHEM\1\METHODS\AFULLW_30.M VOA Calibration Wed Mar 02 06:13:07 2011 Initial Calibration (QT Reviewed) TIC: F71 LCS20.Dldata.ms 3200000 3000000 ~ 2800000 ~ " ~ 0 :E 2600000 () 0 ~ 2400000 2000000 1800000 1600000 1400000 E 1200000 .. .! ~ I "" ~Q).s 400000 oro *,," iil2 ~~1 E5 ~ ~i Ee-t? e.gt- 200000 "'ti TIme--> AFULLW_30.M Fri Mar 18 07:48:48 2011 Report Date: 3/2 1I2l'i' l'lI.g Ep'age'll 2 of 15 Quantitation Report C:\msdehem\1\DATA\MARII-C\17MARllA\ F74LMBLK.D 17 Mar 2011 7:07 pm (QT Reviewed) Data Path Data File Aeq On Operator Sample Mise MB VOC 031711B ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via 'Abundance 1900000 1800000 1700000 1600000 1 1500000 1400000 1300000 1200000 1100000 1000000 900000 800000 700000 600000 500000 400000 300000 200000 100000 o A MBLK 5. OML 36 Sample Multiplier: 1 Mar 18 07:49:41 2011 C:\MSDCHEM\1\METHODS\AFULLW_30.M VOA Calibration Wed Mar 02 06:13:07 2011 Initial Calibration TIC; F74LMBLK.D\data.ms ~ ~ ~ • ~ ~ j a: ~ ~ " c: Cl) ~ ~ E 11 e ~ g '5 Sl E :§ e '" ,g <'t '" !5 " Cl) Cl) f " [:! ~ .2 .c .Y 0 .t. ~ ~ " I:! ~ 0 " '3 E e CD ~ Cl) , I I I .. I I \ me .. > 2.00 250 3.00 3.50 4.00 4.50 5.00 5.50 6,9Q 6.50 7.00 7.50 8.00 8.50 9.00 9.50 10.00 10.50 11.00 11.50 AFULLW_30.M Fri Mar 18 07:49:48 2011 Report Date: 312 I 12ijfllgEP'agtf!1 3 orl5 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via Tim&-> Quantitation Report C:\msdehem\1\DATA\MAR11-C\17MARllA\ F77S2721. D 17 Mar 2011 8:04 pm 1l03272-001AMS MS 5.0ML 20F3 39 Sample Multiplier: 1 Mar 17 20:16:54 2011 C:\MSDCHEM\1\METHODS\AFULLW_30.M VOA Calibration Wed Mar 02 06:13:07 2011 Initial Calibration (Not Reviewed) TIC: F77S2721.Dldata.ms AFULLW_30.M Fri Mar 18 08:34:52 2011 Report Date: 3/2 1/2Q'llIg%ge'l1 4 of 15 Quantitation Report C:\msdehem\l\DATA\MARlI-C\17MARIIA\ F78D2721.D 17 Mar 2011 8:24 pm 1l03272-001AMSD Data Path Data File Aeq On Operator Sample Mise MSD 5.0ML 30F3 ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via 40 Sample Multiplier: 1 Mar 17 20:35:58 2011 C:\MSDCHEM\1\METHODS\AFULLW_30.M VOA Calibration Wed Mar 02 06:13:07 2011 Initial Calibration (Not Reviewed) TIC: F78D2721.Dldata.ms 3200000 3000000 I 2800000 2600000 2400000 2200000 "!. CD 2000000 ~ c: i '!l ~ ~ ~ i (/J ~ 1800000 Ij E ~I ... 1600000 1400000 1200000 1000000 AFULLW_30.M Fri Mar 18 08:35:02 2011 Report Date: 3/21/2{jfl\g%ge115 of 15 American West Analytical Laboratories WORK ORDER Summary Client: Denison Mines Client ID: DEN 100 Contact: Jo Ann Tischler Project: March Monthly QC Level: LEVEL III Work Order: 1103272 Page 1 of 1 3117/2011 WOType: Project Comments: No Hard Copies (UL). QC 3 & Summary. EDD-CSV. Report THF to 1 !lgIL.; 1l1'b:.tf., ~ ~ SampleID 1103272-001 A 1103272-002A Client Sample ID MW-li Trip Blank Collected Date Received Date Date Due 3115/2011 11 :55:00 AM 311712011 10:55:00 AM 313 112011 3/1512011 3131120 1) Matrix Test Code Sel Storage Aqueous 8260-W ~ VOCFridgc J S260-W ~ VOCFridge ~ I Sheet 1 of 1 /((j~'-)L 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 Project Sam lers Name March Monthl Tanner Holliday Date Time Sample 10 Collected Collected Laboratory Analysis Requested MW-11 3/15/2011 1155 THF TRIP BLANK s(I"~" Please notify Ryan Palmer or Tanner Holliday of Reciept tempature on these samples Immediately! Thank Iyou. DatelTime o DN/A COC Tane Was: Prese..!)t on Outer Package 19'1"es 0 No 0 N/A Unbrok94n Outer package !IY1es DNo DN/A Present on §;unple DYes [l}'No 0 N/A Unbroken on SamplV' DYes 0 No rn-NIA Lab Set ID: ----llD~2-r 2------ Container T o AWAL Su DAWALSu o AWAL Su Notes: I Properly Preserved [iY\'es 0 No 0 N/A I Notes: Notes: Rec. Within Hold Notes: Bottle Type Ammonia COD Cyanide Metals N02 &NO:; Nutrients 0&0 Phenols Sulfide TKN TOC TP0 4 TPH Procedure: 1) 2} 3} 4) 5) .6) 7) es oNo Discrepancies Between Labels and CDC Preservative All pHs OK pH <2 H2S0 4 pH <2 H2S0 4 PH >12 NaOH pH <2 RNO; pH <2 H2S0~ pH <2 H2SO4 pH<2HCL pH <2 H2SO4 pH > 9NaOH, ZnAC pH <2 H2SO4 /' pH <2 H3P04 pH <2 H2SO4 /' pH <2HCL V /' /' v"r V 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 Notes: / ./ 1/ 7 V /' V /' If sample is not preserved properly 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 V DYes UPS Internet Shipping: Shipment Label UPS Internet Shipping: View/Print Label 1. 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 DepofID 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 I of 1 https ://www.ups.com/uis/create ? Action OriginPajr=print_Receipt&POPUP _LEVEL= 1 &... 3/16/2011 EI\ERGY ?'. )1./\ I .' I ( oJ www.energylab.com ~Em-'SI«, IW Helena, MT 877-472-0711 • Billings, MT 800-135·4489 • Casper, WY 888-235·0515 Gillette, WY 8&&·&86·7175 • Rapid City, SO 188·172-1225 • College Station, TX 888-&90·2218 ANALYTICAL SUMMARY REPORT April 14, 2011 Denison Mines USA Corp 6425 S Hwy 191 Blanding, UT 84511 Workorder No.: C11030538 Quote ID: C1640 -pac Wells Project Name: March Monthly Groundwater Energy Laboratories, Inc. Casper WY received the following 8 samples for Denison Mines USA Corp on 3/17/2011 for analysis. Sample 10 Client Sample 10 Collect Date Receive Date Matrix Test C11030538-001 MW-11 03/1 5/11 11 :55 03/17/11 Aqueous Metals by ICP/ICPMS, Dissolved C 11030538-002 MW-25 03/15/11 12:10 03/17/11 Aqueous Same As Above C11030538-003 MW-26 03/1 5/11 12 :40 03/17/11 Aqueous Metals by ICP/ICPMS, Dissolved Chloride Nitrogen, Nitrate + Nitrite Gross Alpha minus Rn222 and Uranium Solids, Total Dissolved SW8260B VOCs, Standard List C11030538-004 MW-30 03/14/11 11 :50 03/17/11 Aqueous Metals by ICP/ICPMS, Dissolved Nitrogen, Nitrate + Nitrite C11030538-005 MW-31 03/14/11 14 :30 03/17/11 Aqueous Nitrogen, Nitrate + Nitrite Solids, Total Dissolved Sulfate C11030538-006 MW-65 03/15/11 12:10 03/17/11 Aqueous Metals by ICP/ICPMS, Dissolved C11030538-007 Trip Blank 6029 03/15/11 0 :00 03/17/11 Aqueous SW8260B VOCs, Standard List C 11030538-008 Temp Blank 03/15/11 0 :00 03/17/11 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¥~J) uJ~~ Reporting Supervisor Digitally signed by Stephanie Waldrop Date: 2011.04.14 10:33:19 -06:00 Page 1 of 20 www.energyiab.com Helena, MT 871·472-0711 • Bllllnls, MT 800·735·4489 • Casper, WV 888·235·D515 Alu/fIIcM rmu.-SIIa lISt WV 8S6·&86·7175 • SD 188·672·1225 • TX 888-&80·2218 CLIENT: Denison Mines USA Corp Project: March Monthly Groundwater Report Date: 04/14/11 Sample Delivery Group: C11030538 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. 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 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 20 EN:RGY /\ \ , (~I, J, I ( I ~ I. '. www.energylab.com ~/buIIMcI SInu 1m Helena, MT 877-472-0711 • Billings, MT 800-73S-4489 • Casper, WY 881-235-0515 Gilletta, WY 818-181-7175 • Rapid City, so 888-&72-1225 • College StatiDn, TX 818-1110-221 8 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: March Monthly Groundwater Analyte Count Result Units Method: A2540 C Sample 10: MBLK1_ Solids, Total Dissolved TDS @ 180 C Method Blank ND mg/L Sample 10: LCS1_ Laboratory Control Sample Solids, Total Dissolved TDS @ 180 C 990 mg/L Sample 10: Cll030560-001COUP Sample Duplicate Solids, Total Dissolved TDS@ 180 C 145 mg/L Sample 10: Cll030567-001AMS Sample Matrix Spike Solids, Total Dissolved TDS@ 180 C 2130 mg/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Report Date: 04/14/11 Work Order: Cll030538 RL %REC Low Limit High Limit Run: BAL-C ll0318C 4 Run: BAL-1_110318C 10 99 90 110 Run: BAL-1 110318C - 10 Run: BAL-1 _110318C 10 103 90 110 ND -Not detected at the reporting limit. RPO RPOLimlt Qual 0.8 Batch: R143889 03/18/11 15:22 03/18/11 15 :22 03/18/11 15:25 10 03/18/11 15:29 Page 11 of 20 EN:RGY :., ,(.1.:\ I ! I, , . www.enerD1ab.com MflllJalElallMaJla 1m Helena, MT 177-472-0711 • Billings, MT BOI-735-4489 • Casper, WY 811-235-0515 Gillaita, WY 11&-186-7175 • Rapid City, SD 11.-&72-1225 • College Station, IX 811-610-221 B QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: March Monthly Groundwater Analyte Count Result Units Method: A4500-CI B Sample 10: MBLK9-110328 Chloride Sample 10: C11030538-003AMS Chloride Sample 10: C11030538-003AMSO Chloride Sample 10: LCS35-110328 Chloride Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mg/L Sample Matrix Spike 240 mg/L Sample Matrix Spike Duplicate 242 mg/L Laboratory Control Sample 3570 mg/L Report Date: 04/14/11 Work Order: C11030538 RL %REC Low Limit High Limit RPO RPOLimit Qual Batch: 11 0328-CL-TTR-W Run: TITRATION_11 0328A 03/28/11 11 :41 0.5 Run : TITRATlON_110328A 1.0 100 90 110 Run: TITRATION_110328A 1.0 101 90 110 Run: TITRATION_110328A 1.0 101 90 110 ND -Not detected at the reporting limit. 0.7 03/28/11 12:21 03/28/11 12:23 10 03/28/11 12:26 Page 12 of 20 EI'ERGY .:. \ • ( )' j". I ( I ~ II • ~ www.energylab.com AM/ftIlM~stnc. 1m Hulena, MT 877-472-D711 • Billings, MT 80D-735-4489 • Caspar, WY 888-235-D515 GUlotta, WY 81&-&BB-7175 • Rapid City, SD 888-&72-1225 • College Station, IX 888-610-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: March Monthly Groundwater Analyte Count Result Units Method: A4500-S04 E Sample 10: LCS-1_110321 Sulfate Sample 10: MBLK-C110321 Sulfate Sample 10: C11030538-005AMS Sulfate Sample 10: C11030538-005AMSO Sulfate Qualifiers: RL· Analyte reporting limit. MDC -Minimum detectable concentration Laboratory Control Sample 4940 mg/L Method Blank NO mg/L Sample Matrix Spike 723 mg/L Sample Matrix Spike Duplicate 726 mg/L Report Date: 04/14/11 Work Order: C11030538 RL %REC Low Limit High Limit RPO RPOLimlt Qual Batch: 11 0321_C S04-TURB-W Run: TURB-2_110321A 03/21/11 14:21 100 103 90 110 Run: TURB-2_110321A 03/21 /1114:23 0.8 Run: TURB-2_110321A 03/21/11 15:28 10 100 90 110 Run: TURB-2_110321A 03/21/11 15:31 10 101 90 110 0.4 10 ND -Not detected at the reporting limit. Page 13 of 20 EI\ERGY .'" , ,\. ) S l .• I ~.I I , r '. Client: Denison Mines USA Corp Heltna, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 881-235-0515 Gillatta, WY 11&-68&-7175 . Rapid City, SD 888-&72-1225 • CDilege station, IX 8II-&ID-2218 QA/Qe Summary Report Prepared by Casper, WY Branch Report Date: 04/14/11 Project: March Monthly Groundwater Work Order: C11030538 Analyte Count Result Units Method: E200.8 Sample 10: LRB Method Blank Uranium ND mg/L Sample 10: LFB Laboratory Fortified Blank Uranium 0.0575 mg/L Sample 10: C11030376-008BMS4 Sample Matrix Spike Uranium 31.0 mg/L Sample 10: C11030376-008BMSO Sample Matrix Spike Duplicate Uranium 31.3 mg/L Method: E200.8 Sample 10: LRB Method Blank Selenium 0.0004 mg/L Sample 10: LFB Laboratory Fortified Blank Selenium 0.0523 mg/L Sample 10: C11 030538-001 AMS4 Sample Matrix Spike Selenium 0.0466 mg/L Sample 10: C11030538-001AMSO Sample Matrix Spike Duplicate Selenium 0.0469 mg/L Method: E200.8 Sample 10: LRB Method Blank Manganese ND mg/L Sample 10: LFB Laboratory Fortified Blank Manganese 0.0518 mg/L Sample 10: Cl1040343-0050MS4 Sample Matrix Spike Manganese 0.0682 mg/L Sample 10: C11040343-0050MSO Sample Matrix Spike Duplicate Manganese 0.0710 mg/L Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. RL %REC Low Limit High Limit RPO RPOLimit Qual Batch: R143921 Run : ICPMS2-C_ll 0322A 03/22/11 15:56 IE-OS Run: ICPMS2-C_ll 0322A 03/22111 16:00 0.00030 115 85 115 Run: ICPMS2-C_ll0322A 03/23/11 05 :08 0.00030 70 130 A Run: ICPMS2-C_11 0322A 03/23/11 05:12 0.00030 70 130 0.9 20 A Batch: R143967 Run : ICPMS2-C_11 0323A 03/23/11 12:03 0.0002 Run: ICPMS2-C_l1 0323A 03/23/1112:10 0.0010 104 85 115 Run: ICPMS2-C_110323A 03/23/11 23:18 0.0010 90 70 130 Run: ICPMS2-C_11 0323A 03/23/11 23:25 0.0010 91 70 130 0.6 20 Batch: R144792 Run: ICPMS2-C_l10413A 04/13/11 11 :57 5E-05 Run: ICPMS2-C_110413A 04/13/11 12:03 0.0010 104 85 115 Run: ICPMS2-C_11 0413A 04/13/11 18:30 0.010 96 70 130 Run: ICPMS2-C_11 0413A 04/13/11 18 :37 0.010 102 70 130 4.0 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 14 of 20 EN:RGY ,., 1(,tl •• lt,!/!I·, www.energylab.com AMI/fIa/~sr-1m Helena, MT877-472-D711 • Billings, MT800-735-4488 . Casper, WV 881-235-0515 Gillette, WY 88&-888-7175 • Rapid City, SO 888-&72-1225 • College StatiDn, 1J( 888-610-2218 QA/Qe Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: March Monthly Groundwater 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: C11030528-014AMS Nitrogen, Nitrate+Nitrite as N Sample 10: C11030528-014AMSO Nitrogen, Nitrate+Nitrite as N Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mg/L Laboratory Control Sample 2.62 mg/L Sample Matrix Spike 4.16 mg/L Sample Matrix Spike Duplicate 4.25 mg/L Report Date: Work Order: RL %REC Low Limit High Limit RPO Run : TECHNICON_11 0324A 0.06 Run : TECHNICON_11 0324A 0.10 105 90 110 Run: TECHNICON_110324A 0.10 104 90 110 Run: TECHNICON_11 0324A 0.10 10B 90 110 2.1 ND -Not detected at the reporting limit. 04/14/11 Cll030538 RPOLlmlt Qual Batch: R144035 03/24/11 12:31 03/24/11 12 :34 03/24/11 14:06 03/24/11 14:09 10 Page 15 of 20 EN:RGY • \' I ~ .. , I," l,! ... 1\ •• www.energylab.com /NIffJaI buIMu S/nu 1152 Helena, MT 877-472-D711 • Billings, MT 8DO-735-44111 • Casper, WV 8118-235-0515 Gillette, WV 1181-886-717!1 • Rapid City, SD 1118-&72-1225 • Collage Station, 1X 881-680-221 8 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: March Monthly Groundwater Analyte Count Method: E900.1 Result Sample 10: MB-GA-0426 Gross Alpha minus Rn & U 3 Method Blank 0.1 Gross Alpha minus Rn & U Precision (±) Gross Alpha minus Rn & U MDC 0.09 0.1 Units pCi/L pCi/L pCi/L Sample 10: LCS-GA-Q426 Laboratory Control Sample Gross Alpha minus Rn & U 11.0 pC ilL Sample 10: TAP WATER-MS Sample Matrix Spike Gross Alpha minus Rn & U 21.8 pCi/L Sample 10: TAP WATER-MSO Sample Matrix Spike Duplicate Gross Alpha minus Rn & U 24.S pCilL Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Report Date: 04/14/11 Work Order: Cll030538 RL %REC Low Limit High limit Run : GSOOOW_ll0411A Run: GSOOOW_ll0411A 103 70 130 Run: GSOOOW_ll0411A 102 70 130 Run: GSOOOW_l10411A 11S 70 130 ND -Not detected at the reporting limit. RPO RPOLimit Qual 12 Batch: GA-0426 04/13/11 22:11 U 04/13/11 22:11 04/13/1122:11 04/13/11 22:11 17.7 U -Not detected at minimum detectable concentration Page 16 of 20 EN:RGY ,~\ (' I . ,I I.. : ~ 1\ •• www.energylab.com IM/tfIaI EIuIIeiru stnu IW Hellma, MT 877-.472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 GillBlte, WY 81&-&86-7175 • Rapid City, SD 888-612-1225 • College Station, TX 888-610-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 04/14/11 Project: March Monthly Groundwater Work Order: C11030538 Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Method: SWB260B Batch: R143997 Sample 10: 23-Mar-11_LCS_4 15 Laboratory Control Sample Run: 5975VOC1_110323B 03/23/11 13 :21 Benzene 12 ug/L 1.0 115 70 130 Carbon tetrachloride 11 ug/L 1.0 111 70 130 Chloroform 11 ug/L 1.0 110 70 130 Chloromethane 11 ug/L 1.0 111 70 130 m+p-Xylenes 21 ug/L 1.0 107 70 130 Methyl ethyl ketone 110 ug/L 20 108 70 130 Methylene chloride 9.9 ug/L 1.0 99 70 130 Naphthalene 11 ug/L 1.0 110 70 130 o-Xylene 11 ug/L 1.0 109 70 130 Toluene 11 ug/L 1.0 109 70 130 Xylenes, Total 32 ug/L 1.0 108 70 130 Surr: 1,2-0ichlorobenzene-d4 1.0 105 80 120 Surr: Oibromofluoromethane 1.0 105 70 130 Surr: p-Bromofluorobenzene 1.0 104 80 130 Surr: Toluene-d8 1.0 104 80 120 Sample 10: 23-Mar-11_MBLK_6 15 Method Blank Run: 5975VOC1 _110323B 03/23/11 14:32 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 1.0 119 80 120 Surr: Oibromofluoromethane 1.0 108 70 130 Surr: p-Bromofluorobenzene 1.0 112 80 120 Surr: Toluene-d8 1.0 94 80 120 Sample 10: C11030554-001FMS 15 Sample Matrix Spike Run : 5975VOC1 _110323B 03/23/11 20:21 Benzene 120 ug/L 10 116 70 130 Carbon tetrachloride 120 ug/L 10 121 70 130 Chloroform 120 ug/L 10 120 70 130 Chloromethane 110 ug/L 10 111 70 130 m+p-Xylenes 220 ug/L 10 111 70 130 Methyl ethyl ketone 1100 ug/L 200 110 70 130 Methylene chloride 100 ug/L 10 100 70 130 Naphthalene 81 ug/L 10 81 70 130 o-Xylene 110 ug/L 10 113 70 130 Toluene 110 ug/L 10 112 70 130 Xylenes, Total 330 ug/L 10 111 70 130 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MOC -Minimum detectable concentration Page 17 of 20 EN:RGY " ). ,II. j"I!' www.energytab.com IM/fIIO/ EIuIIItIa SfIIU IIBZ Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 GiliaIte, WY 88&-888-7175 • Rapid City, SD 888-872-1225 • COIIDgS Station, TX 888-&10-221 8 QAlQC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 04/14/11 Project: March Monthly Groundwater Work Order: C11030538 Analyte Count Result Units RL %REC Low Limit High limit RPD RPDLimit Qual Method: SWB260B Batch: R143997 Sample 10: C11 030554-001 FMS 15 Sample Matrix Spike Run: 5975VOCC 110323B 03/23/11 20:21 Surr: 1,2-Dichlorobenzene-d4 1.0 106 80 120 Surr: Dibromofluoromethane 1.0 110 70 130 Surr: p-Bromofluorobenzene 1.0 106 BO 120 Surr: Toluene-dB 1.0 106 BO 120 Sample 10: C11 030554-001 FMSD 15 Sample Matrix Spike Duplicate Run: 5975VOC1 -110323B 03/23/11 20:57 Benzene 110 ug/L 10 114 70 130 1.7 20 Carbon tetrachloride 120 ug/L 10 115 70 130 5.1 20 Chloroform 110 ug/L 10 114 70 130 5.1 20 Chloromethane 110 ug/L 10 107 70 130 3.7 20 m+p-Xylenes 210 ug/L 10 107 70 130 3.1 20 Methyl ethyl ketone 1100 ug/L 200 112 70 130 1.B 20 Methylene chloride 99 ug/L 10 99 70 130 1.2 20 Naphthalene 97 ug/L 10 97 70 130 1B 20 o-Xylene 110 ug/L 10 109 70 130 3.6 20 Toluene 110 ug/L 10 110 70 130 2.2 20 Xylenes, Total 320 ug/L 10 10B 70 130 3.3 20 Surr: 1,2-Dichlorobenzene-d4 1.0 106 BO 120 0.0 10 Surr: Dibromofluoromethane 1.0 10B 70 130 0.0 10 Surr: p-Bromofluorobenzene 1.0 106 BO 120 0.0 10 Surr: Toluene-dB 1.0 104 BO 120 0.0 10 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MOC -Minimum detectable concentration Page 18 of 20 EN:RGY '. • 0,' I I :. www.energy1eb.com ~~SItIc.'1U HBlena, MT 877-472-0711 • Billings, MT 800·735-44B9 • Casper, WY BBI·235·0515 Gillette, WY 186-188·7175 • Rapid City, SD 888·172·1225 • CoIlsgs Station, 1X 881·690·2218 Workorder Receipt Checklist Denison Mines USA Corp I ~IIIIIIIIIIIIII~ IIIIIIII!III~ III~ III~ IIIIII ~II C11030538 Login completed by: Halley Ackerman Reviewed by: BL2000\kschroeder Reviewed Date: 3/18/2011 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 [{1 Yes [{1 Yes 0 Yes [{1 Yes [{1 Yes [{1 Yes [{1 Yes [{1 Yes [{1 Yes [{1 3.0'C On Ice Yes [{1 Yes [{1 Date Received: 3/17/2011 Received by: ha Carrier Fed Ex name: No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No D No 0 Not Present 0 Not Present 0 Not Present [{1 No VOA vials submitted D Not Applicable D Page 19 of 20 ) -u III (C CD I\) o o -I\) o Chain of Custody and Analytical Request Record Page .-l..-of ~ PLEASE PRINT (Provide as much information as possible.) Company Name: LGVJ;SON_ rv1/~es Report Mail Addres~ 8""6 Q pD. r.::>~ ( J5hnJJ;',c lA-1' 84~JI Invoice Address: 'LJ T ,-S'oo-~ Special Report/Formats: DDW D EDD/EDT(Electronic Data) D POTWNlJWTP Format: ___ _ o State: ___ _ o Other: ___ _ D LEVEL IV D NELAC SAMPLE IDENTIFICATION Project Name, PWS, Permit, Etc. (YJ~~~~Y6lA~ /kj,J1 Contact Name: tb)lneiFax: 12~J IdJm~ CrY 222-1 Invoic€l Contact &: Phone: c Sr:<_ w-.4! ~ ~W®!l~ [Jd~®@~ o .... 1Il01ll~ ~ .~~~~~ ~ J ~ ~oo~~~ I 8:s:=a ~ g' 0 o«~lml~ « ~~~§~ ~ ~~~. ~ ~ 0)--0) s: zc.«IClo W E ~ W ~ W (Name, Location. Interval,. etc.l_'------===-------'-_--'-".:..:..=._-'--___ ----'-_-'------L_-=---=I-----'------'~____I_____'..I__ MIAJ-II 13 1 5·tJ 1//S5 II-IN IX 2 .fi11.,u _ 2"5" 13" S . 1/ 1 /2 I () 1 /-itJ 3 lrt/IJ -2" _ _ Ls-·/S--11 1 J2l{() I;;'-IAJ 4 MiN ~s~ 13-ILl, 11 liJ5'O 12 ... l/J x xix Ix lxlx Ix xTil Ix 5 {VtJAJ -.3/ 1:g'/LI·n 1/l/30 12-w )( I I \ \ X r Ix: 6 ~_t,.5:.. 13-/S'-IJ IJ2J() I I-lAJ x 7 ~ ~IL ~1...CA. e ?(6 rtr) fu~ ., - 10 Custody RlicoiWd by (pri!itj; Sample Origin State: lA-r EPA/State Compliance: Yes ~ No 0 Email: Sampler: (Please Print) ~"u UtJ/J,'Aa.1J Purchase Order: Quote/Bottle Order: .-J .. ~I R ~ "0 ~ I U III E ::l ~ I 5 III "0 C l5 I H Contact ELI prior to RUSH sample submittal for charges and scheduling -See Instruction Page Comments: ~~ Cooler 10(5): ~ ReceiplTemp :~.a °c On Ice: 0 N Custody Seal On Botile On Cooler Intact Signature Match ~ s::!I ~ cgr nnn ~ ~ f= ~ l!!f; ©) [l:'::,- ~ ~ Y N &: 0)N 1~1~\~ F::! DatelTIme: Sigmifurc: Record ReeeiYVd by (print): Oalem...,; Signature: M~STbe~------------__ --------~ ____ --__ ~~~~~~~~-. ____ ~~_------~~~~----~ Signed _ Sample Disposal: ReturntoClient __ ._, Lab Disposal: 5-rr'\\ '1.00 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 wilt be clearly notated on your analytical report " TabG Quality Assurance and Data Validation Tables G-IA: Field Data QAlQC Evaluation -Quarterly Samples Time Req'd for 2 Time Pumped Amount Well Sample Date Casings (min) Sufficient? Conductance RPD(%) pH RPD(%) Tem( CC) RPD(%) Redox Potential (Eh) MW-2 2/14/2011 114.77 120 Y 3849 3848 0.03 6.70 6.79 1.33 13.49 13.49 0.00 188 MW-3 2/15/2011 48.3 50.0 Y 5833 5830 0.05 6.08 6.09 0.16 14.28 14.34 0.42 293 MW-3A 2116/2011 60.9 55.0 Purged Dry 6141 6145 0.07 6.05 6.05 0.00 14.23 14.23 0.00 309 MW-5 2114/2011 193.5 200.0 Y 3192 3192 0.00 7.31 7.31 0.00 14.34 14.34 0.00 247 MW-11 2/2/2011 245.4 250.0 Y 2868 2869 0.03 7.47 7.47 0.00 13.39 13.4 0.Q7 244 MW-12 2/15/2011 131.8 115.0 Purged Dry 4265 4263 0.05 6.39 6.43 0.62 14.37 14.36 0.Q7 271 MW-14 21712011 149.9 160.0 Y 4034 4035 0.02 6.22 6.23 0.16 13.93 13.93 0.00 168 MW-18 2/15/2011 383.1 390.0 Y 3590 3591 0.03 6.26 6.27 0.16 13.78 13.77 0.07 202 MW-19 2/2112011 589.7 615.0 Y 1457 1456 0.07 6.79 6.78 0.15 14.07 14.05 0.14 281 MW-20 2/16/2011 33.3 45.0 Y 6780 6767 0.19 6.96 6.95 0.14 12.44 12.49 0.40 290 MW-22 2/8/2011 283.4 285.0 Y 6970 6960 0.14 5.57 5.58 0.18 14.08 14.07 0.07 303 MW-23 2/9/2011 113.6 110.0 Purged Dry 4006 4006 0.00 6.13 6.13 0.00 12.06 12.07 0.08 325 MW-24 2/10/2011 37.0 30.0 Purged Dry 4642 4641 0.02 5.75 5.73 0.35 13.00 13.00 0.00 301 MW-25 2/2/2 011 242.2 255.0 Y 3166 3170 0.13 6.66 6.66 0.00 13.57 13.55 0.15 314 MW-26 2/16/2011 NA 3598 NA 6.06 NA 14.55 NA MW-27 2/9/2011 265.2 270.0 Y 1596 1597 0.06 6.70 6.71 0.15 14.27 14.26 0.Q7 304 MW-28 2114/2011 197.8 200.0 Y 4071 4071 0.00 5.71 5.70 0.18 14.23 14.23 0.00 214 MW-30 2/1/2011 202.8 205.0 Y 2023 2023 0.00 6.93 6.96 0.43 13.34 13.35 0.Q7 307 MW-31 21112011 369.6 375.0 Y 1766 1773 0.40 7.22 7.21 0.14 12.91 12.89 0.16 379 MW-32 2/9/2011 338.4 340.0 Y 4052 4059 0.17 6.00 5.99 0.17 13.86 13.85 0.07 77 MW-34* 2116/2011 NA NA Y 4325 4312 0.30 6.54 6.49 0.77 13.31 13.32 0.08 261 MW-35 2/15/2011 0.9 0.4 Purged Dry 3296 NA 7.17 NA 11.41 NA * Due to the low volume of water a pump will not work in this well. The well was bailed with a disposable bailer and 7 gallons of water were purged. One casing volume was 0.953 gallons, therefore, the purge volume was sufficient and parameters were stable. MW-26 is a continuously pumped well. Purged dry 187 292 310 245 240 270 166 200 283 290 303 325 302 313 311 304 213 307 379 76 267 330 RPD(%) Turbidi y (NTU) 0.53 0 0 0.34 0 0 0.32 0.5 0.5 0.81 16.2 16.1 1.65 0 0 0.37 7.9 7.9 1.20 0 0 1.00 1 1 0.71 5.1 5.1 0.00 7.3 7.5 0.00 4.4 4.3 0.00 1.7 1.6 0.33 1.2 1.2 0.32 0 0 NA 0 0.00 0 0 0.47 0 0 0.00 0 0 0.00 0 0 1.31 8.7 8.6 2.27 112.1 107.1 NA 119.8 The QAP states that turbidity should be less than 5 Nephelometric 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 less than 5 NTU are included for information purposes only. >5NTU RPD(%) N 0.00 N 0.00 N 0.00 Y 0.62 N 0.00 Y 0.00 N 0.00 N 0.00 Y 0.00 Y 2.70 N 2.30 N 6.06 N 0.00 N 0.00 N 0.00 N 0.00 N 0.00 N 0.00 N 0.00 Y 1.16 Y 4.56 N NA G-IB: Field Data QAlQC Evaluation -Acelerated Samples Time Req'd for 2 Time Pumped Amount Well Sample Date Casings (min) Sufficient? Conductance RPD(%) pJl RPD("/..) Temp Cc) RPD(%) Redox Potential (Eh) RPD(%) Turbidity (NTU) <5 (NTU) RPD(%) Accelerated July Monthly MW-ll 1/1112011 243 .1 245.0 Y 3003 3002 0.03 7.43 7.43 0.00 13.91 13.91 0.00 206 204 0.98 0.7 0.7 Y 0.00 MW-14 111112011 147.8 168.0 Y 4057 4064 0.17 6.37 6.37 0.00 13.55 13.54 0.07 342 341 0.29 0.7 0.7 Y 0.00 MW-25 111112011 240.1 245.0 Y 3354 3353 0.17 6.43 6.44 0.16 13.78 13.77 0.07 260 260 0.00 0.9 0.9 Y 0.00 MW-26 1112/2011 NA 3614 NA 6.83 NA 14.32 NA 273 NA 0 Y NA MW-30 1110/2011 200.7 205.0 Y 2143 2143 0.00 6.67 6.65 0.30 13.9 13.91 0.07 291 291 0.00 0 0 y 0.00 MW-31 1110/2011 366.2 375.0 Y 1867 1869 0.11 6.59 6.65 0.91 13.61 13.56 0.37 332 332 0.00 1.9 1.9 Y 0.00 Accelerated Au ust Monthl MW-ll 3/15/2011 245.0 250.0 Y 2720 2714 0.22 7.95 7.94 0.13 14.82 14.8 0.14 104 103 0.97 0 0 y 0.00 MW-14 311412011 149.0 150.0 Y 3903 3903 0.00 6.76 6.76 0.00 14.45 14.45 0.00 383 375 2.11 0 0 y 0.00 MW-25 311512011 241.9 250.0 Y 3207 3207 0.00 6.8 6.79 0.15 14.57 14.56 0.07 254 252 0.79 0 0 y 0.00 MW-26 3/1512011 NA 3465 NA 6.89 NA 16.02 NA 237 NA 0 Y NA MW-30 3114/2011 198.7 200.0 Y 2054 2057 0.15 7.09 7.1 0.14 14.47 14.47 0.00 268 264 1.50 0 0 y 0.00 MW-31 3/1412011 367.8 370.0 Y 1796 1800 0.22 7.52 7.48 0.53 14.61 14.6 0.07 367 362 1.37 0 0 y 0.00 MW-26 is a continuously pumped well. Table G-2 Holding Time Check All quarterly and accelerated analytes met the QAP required holding times. G-3A: Laboratory Receipt Temperature Check -Quarterly Samples Sample Batch Wells in Batch Temperature A W AL -1102080 MW-ll, MW-25, MW-30, MW-31 3.8 DC AWAL-1102168 MW-14, MW-22, MW-65 2.4 DC AWAL-II02272 MW-20, MW-26, MW-34, MW-35, 3.3 DC MW-60, MW-35R EL -CII020163 MW-14, MW-22, MW-24, MW-27, 2 DC MW-32, MW-65 EL -CII020352 MW-ll, MW-14, MW-22, MW-25 2 DC MW-2, MW-3, MW-3A, MW-5, MW- EL -Cl1020544 12, MW-18, MW-20, MW-26,MW-2 DC 28, MW-34, MW-35, MW-35R, MW- 60 MW-70 G-3B: Laboratory Receipt Temperature Check -Accelerated Samples Sample Batch Wells in Batch Temperature January Monthly Accelerated EL -CII0I0389 MW-ll, MW-25, MW-26, MW-30, MW-31, 3°C MW-65 AWAL -1101179 MW-ll 4.4 -C March Monthly Accelerated AWAL -1103272 MW-11 2.3°C EL -CI0081016 MW-ll, MW-25, MW-26, MW-30, MW-31, 3 °e MW-65 G-4A: Analytical Metbod Cbeck -Quarterly Samples Parameter QAPMelbod Metbod Used bv Lab Ammonia (as N) A4500-NH3 G A4500-NH3 G Nitrate + Nitrite (as N) E353.2 E353.2 Metals except Iron E200.8 E200.8 Iron E200.7 E200.7 Gross Alpha E900.1 E900.l VOCs except TetrahY9rofuran SW8260B SW8260B Tetrahvdrofuran SW8260C SW8260C Chloride A4500-CI B A4500-CI B Fluoride A4500-F C A4500-FC Sulfate A4500-S04 E A4500-S04 E TDS A2540 C A2540 C Carbonate as C03, Bicarbonate as HC03 A2320 B A2320 B Calcium, Magnesium, Potassium, Sodium E200.7 E200.7 Tetrahydrofuran was analyzed by American West Analytical Laboratories. All other constituents were analyzed by Energy Laboratories, G·4B: Analytical Method Check· Accelerated Samples Parameter OAPMclhod Methoil Ujed bv Lab Nitratc ~ Nitrite (as N) 853.2 E353.2 Manganese. Uranium, Selenium E200.8 13200.8 Gross Alpha E900.1. £900.1 VOCs exccpt Tctrahydrofuran SW8260B SW8260B Tetrahydrofuran SW8260C SW8260.C Chloride A4500·CIO A4500·CI B IDS A2540C A2540C Tc.rahyd,ofunm wu .n.ly><:d by Anlcri",," Wes. AllIlytLc.1 Loboruonc<. All o[h ... ct>",tI[u.~ ,,'\:tc anoJytt<! by Enc'l!Y Lobo'IUO".,.. Table G-5 Reporting Limit Check All quarterly and accelerated analytes were reported to the QAP required RLs unless a dilution was required for matrix interference or sample concentration. G-6A: Trip Blank Evaluation -Quarterly Samples All trip blanks for the quarterly samples were nondetect. Blal1k Sample Date Laboratory 1 211120 II American West Analytical Laboratories 2 2/7120 [1 American West Analytical Laboratories 3 2/J4/2011 American West Analytical Laboratories 4 2/2/2011 Energy Laboratories 5 217120 I I Energy Laboratories 6 2/16/2011 Energy Laboratories G-6B: Trip Blank Evaluation -Accelerated Samples All trip blanks for the Accelerated samples were non detect. Blank Sample Date Laboratory 1 1112/2011 Energy Laboratories 2 1111 /2011 American West Analytical Laboratories 3 311 512011 Energy Laboratori.es 4 311 5/2011 American West Analytical Laboratories G-7 A: QAlQC Evaluation for Quarterly Sample Duplicates Constituent MW-22 Ammonia (as N) 0.13 Nitrate + Nitrite (as N) 2.5 Beryllium 2.31 Cadmium 85 Cobalt 267 Manganese 28600 Molybdenum 719 Nickel 130 Selenium 12 Thallium 1.12 Uranium 44.4 Zinc 511 Chloride (mg/L) 57 Field pH (S.U.) 5.58 Fluoride (Mg/L) 3.09 Lab pH (S .U.) 6.35 Sulfate (mg/L) 4490 TDS CroglL) 6800 Bicarbonate as HC03 565 Calcium 440 Magnesium 803 Potassium 21.5 Sodium 258 Radiologic Duplicate Tests Gross Alpha minus Rn & U MDC Gross Alpha minus Rn & U* Gross Alpha minus Rn & U Precision (±) Constituent Thallium Field pH (S.u.) Sulfate (mg/L) TDS (mg/L) Only analytes whlch reported detections for both the parent sample and the duplicate are shown. 0.6 9.5 1.1 MW-18 3.49 6.27 1770 3250 MW-65 %RPD 0.11 16.67 2.4 4.08 2.16 6.71 83.2 2.14 267 0.00 28100 1.76 708 1.54 128 1.55 13.6 12.50 1.01 10.33 41.7 6.27 500 2.18 59 3.45 5.58 0.00 3.15 1.92 6.65 4.62 4870 8.12 6630 2.53 567 0.35 430 2.30 847 5.33 20.9 2.83 255 1.17 0.6 0.00 9.1 0.257 1.1 MW-70 %RPD 3.54 1.42 6.27 0.00 1610 9.47 3180 2.18 * Duplicate checks reported for gross alpha are not %RPD. Calculated values are based on the formula in the approved QAP. G-7B: QAlQC Evaluation for Accelerated Sample Duplicates MW-25 MW-65 Constituent (1/11/11) (1/11111) %RPD Uranium 7.02 6.94 1.15 MW-25 MW-65 COD$titUeilt (3/15/11 ) (3/15/11) %RPD Uranium 6.8 6.8 0.00 Only analytes with detections are shown. G-8A: Radiologies Counting Error for Quarterly Samples Gross Alpha Counting Gross Alpha minus Rn & U Error:=; Within Well Sample Date minus Rn & U Precision (±) 20% GWCL GWCL? MW-2 MW2 2/14/2011 1.1 0.1 Y 3.2 Y MW-l1 MW 11 2/2/2011 0.1 0.06 N 3.75 Y MW-14 MW14 21712011 0.4 0.09 N 7.5 Y MW-20 MW20 2116/2011 0.6 0.1 Y NA MW-22 MW22 2/8/2011 9.5 1.1 Y NA MW-25 MW25 2/2/2011 0.6 0.09 Y 7.5 Y MW-26 MW26 2116/2011 3 0.2 Y 4.69 Y MW-27 MW27 2/9/2011 0.7 0.1 Y 2 Y MW-30 MW30 2/1/2011 0.2 0.07 N 3.75 Y MW-31 MW31 2/1/2011 0.4 0.08 Y 7.5 Y MW-32 MW32 2/9/2011 1.5 0.2 Y 3.33 Y MW-34 MW34 2116/2011 0.5 0.1 Y NA MW-35 MW35 2115/2011 2.6 0.2 Y NA MW-65 MW65 2/8/2011 9.1 1.1 Y NA Groundwater concentration levels have not been established for MW-20, MW-22, MW-34, and MW-35. G-8B: Radiologics Counting Error for Accelerated Samples Gross Alpha Counting Gross Alpha minusRn & U Error ~ Within Well Sample Date mi nus Rn & U Precision (±) 20% GWCL GWCL? MW-26 MW26 Not Sampled· MW-26 MW26 3/15/2011 2.7 0.2 Y 4.69 Y • The Q4 2010 analysis for gross alpha in MW-26 was re--analyzed due to an analytical laboratory issue. Final analytical data from the Q4 2010 were received in February 2011. Accelerated sampling for MW-26 began in March 2011. G-9A: Laboratory Matrix QC M S 'k 0/1 R atrIX ;pL e 0 . ecove'l C ompanson MSD Lab Report Well Analyte MS%REC %REC RECRange RPD CII020163 MW-ll Tin 61 74 70 -130 20 CII020544 MW-20 Uranium NC NC 70 -130 NC CI1020544 MW-3 Silver 69 70 70 -130 1.4 CII020352 MW-24 Manganese NC NC 70 -130 NC Cll020352 NA Methyl Ethyl Ketone 118 134 70 -130 12 NA = MS samples were not Demson samples. NC = Recovery was not calculated as the analyte level in the sample was greater than 4 times the spike level. Method Blank Detections QAP WeWSamp Reported Required Lab Report Ie Analyte Concentration RL Cll020352 NA Tin O.3ugIL 100 ugIL Cll020352 NA Uranium 0.02 ugiL 0.3 ugIL CII020352 NA Zinc 3ugIL 10 ugiL Cll020352 NA Nitrate 0.07 mgIL 0.1 mgIL CII020352 NA Bicarbonate as HC03 2 mgIL I mglL CI1020352 NA Sulfate I mgIL I mglL CII020352 NA Sulfate 2mgIL I mg/L Cll020352 NA Iron 2ugIL 30 ugIL CI1020352 NA Sodium 0.5 mgIL 0.5 mgIL ClI020544 NA Fluoride 0.02 mgll 0.1 mgIL CI1020544 NA Sulfate 0.8 mg/L 1.0mgIL CII020544 NA Iron 2.0 ug/L 30.0 ug/L CII020544 NA Sodium 0.5 mg/L 0.5 mgIL CI1020544 NA Arsenic 0.2 ugiL 5.0 ug/L CII020544 NA Beryllium 0.1 ug/L 0.5 ugIL Cll020544 NA Cadmium 0.06 ug/L 0.5 ugIL CII020544 NA Selenium 0.9 ugIL 5.0 ugIL ClI020163 NA Fluoride 0.02 mgIL 0.1 mgIL CI1020163 NA Copper 0.008 ugIL 10 ugll CII020163 NA Lead 0.05 ugIL 1.0 ug/l CI1020163 NA Manganese 0.10 ugIL 10 ugIL CII020163 NA Mercury 0.04 ugIL 0.5 ugIL CII020163 NA Molybdenum 0.3 ug?1 10 ugIL CI1020163 NA Tin 0.80 ugIL 100 ugIL CI1020163 NA Uranium 0.02 ug/L 0.3 ug/L CI1020163 NA Zinc 3.0 ug/L 10 ug/L G-9B: Accelerated Laboratory Matrix QC Matrix Spike % Recovery Com ~arison MSD Lab Report Well Analyte MS%REC %REC RECRange RPD Cll030538 NA Uranium NC NC 70 -130 NC NA = MS samples were not Demson samples. NC = Recovery was not calculated as the analyte level in the sample was greater than 4 times the spike level. S ~ R urrogate 00 ecovery Lab Specified Surrogate REC QAP Required Lab Report Well/Sample Analyte %REC Range Range C11030538 Trip Blank 1,2-Dichlorobenzene-d4 121 80 -120 None Method Blank detections QAP Reported Required Lab Report Well/Sample Analyte Concentration RL Cl1010389 NA Selenium 0.2 ug/L 5.0 ug/L Cl1030538 NA Selenium O.4ug/L 5.0 ugIL G-IO Rinsate Evaluation Rinsate Sample Parameter Rinsate Result Sample Result for Well MW-35R Bicarbonate 4 mg L MW-35 266 MW-35R Nitrate 0.1 m L MW-35 0.3 MW-35R Sulfate 1 m' L MW-35 1140 MW-35 R Iron 55 mgIL MW-35 188 PrevIOus well sampled IS the welllhat the pump was used 10 purge prtor to the rtnsate sample. D = Reporting limit raised due to dilution/sample matrix. m~L m~ L m~ L mgIL Qualifier D TabH Kriged Current Quarterly Groundwater Contour Map and Depth Data /I (( \1 1\ # \ ~..;::::--. ~ = ::::::t-- &~ b ~ ~r # " ,I I' I ~II 1, :' II " " 11 32 II I' ,I II I' II II II II • M~'21 \ \ \ \ \, ~~ ~s.,60 MW·20 .5457 N ~~ ~~ ~~ ~~ ~" - o MW·22 .5450 SCALE IN FEET EXPLANADON perched monitoring well showing elevation in feet amsl ~..... --=--=--~-=--~, 3000 MW-01 .5582 MW·18 .s583 ~ //' -=--=--~-:;:::,~ --=.-=---=-- ~11 TVVN-1~ 1 ~1 ~ ~ f:j67..0 1 05586 TVVN-10 ~12 ~/ /.1-.:::::====- -----------55 ~60 M~50 "" // // // // // // // // // // 0 5555 PIEZ-1 Q 5593 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 TWN-4 <> 5604 TW4-26 ~5537 temporary perched nitrate monitoring well showing elevation in feet amsl KRIGED 1st QUARTER, 2011 WATER LEVELS WHITE MESA SITE , ~ IJ ( ~ '" MW-34 -¢-5492 temporary perched monitoring well installed May, 2010 showing elevation in feet amsl perched monitoring well installed August/September, 2010 HYDRO GEO CHEM,INC-APPROVED DATE flEFERENCE FIGURE showing elevation in feet amsl SJS Q1 2011 H:J718000/may11/w10211.srf H-1 Tab I Groundwater Time Concentration Plots 20 ~ 15 oa .§. II 'U 'I: 0 is 10 5 0.4 ~ oa .§. II 0.3 ~ 0 = u:: 0.2 Time concentration plots for MW-1 Chloride in MW-1 Sample Date Fluoride in MW-1 Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • Oetecte(l Values • Non-Detected Values ~~ Intc=lA ~ ~ ::; t;a .s .. ... ~ ::0 III ::; } E ::0 'c I! :::l 900 800 700 600 500 400 300 200 100 0 ;> ,>"'~ 12 10 8 6 4 2 0 c:",OJ 0 Time concentration plots for MW-1 Sulfate in MW-l Sample Date Uranium in MW-l I' ,J ~ J V V ~, \.[\ l ~ ~ ...... --- .:",,,, ~ ,f'><:J ~",,,, ",'" ,ft f:j'" .,'" ,.;...,<:, ~q .,'O<i ~'O !$ '>~ <! ~,.-l:, ~~ ,>'0 <;:J" ~o Sample Date White Mesa Uranium Mill Groundwater Monitoring Report • Detected Values 1st Quarter 2011 • Non-Detecl~ Values Time concentration plots for MW-2 Chloride in MW-2 20 ::i' 15 iia .§. GI .., -;: R J:. 10 u 5 Sample Date Fluoride in MW-2 0.5 0.45 0.4 0.35 ::i' 0.3 iia .§. GI 0.25 .., .;: CI :> 0.2 u:: /I if\ / A.I ~ ~ I' • ~ J V" 0.15 0.1 0.05 0 ",'" ",'0 .:oP ~o,'" Pi-"p~ ~", ~ ,,;$' .: ">,,,<:f ~ G 5f "?-~ ~'" ,,?-.;s ..,'" ..,.;s <:)'" ..,.;s ~o -:I'" .: 0" Sample Date White Mesa Uranium Mill Groundwater Monitoring Report • Detected Values 1st Quarter 2011 • Non-Detect..d Values Time concentration plots for MW-2 Sulfate in MW-2 2500 2000 1----------t:~~~~".-~~--~.---------------------~~ .. ~-6 ::; o:a 1500 .§. .. ... ~ :::I 1000 II> 500 -.~--------------------------------------------------------~ o Sample Date Uranium in MW-2 20 18 ~ 16 14 ::; 12 } E 10 :::I 'c ~ 8 ;:) Ie ~ ~ f\ II I, ".X ~ , \1 -" 6 4 ~ J A \ / If \ \/ ~ V o .:'0'" <0'0 ,p,<:; ~o,'" <fio ..,c§' ~", ~ ,.,:-.<:; '?-~ ,->",<i ~'Ii § ,>" "," r;! '?-" ,>'Ii ~ .... " ~o Sample Date White Mesa Uranium Mill Groundwater Monitoring Report • Detected Values 1st Quarter 2011 • Non-Detected Values 80 70 60 ::;-50 oa .§. II 40 :2 ... ..2 .J::. I.J 30 20 10 0 ",'b<:> \~ 0.8 ::;-oa .§. II 0.6 ... . r: 0 :::I ..: 0.4 0.2 'b'" ~ ~o Time concentration plots for MW-3 Chloride in MW-3 9i-.: ".0. Sample Date Fluoride in MW-3 Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • Delecte(i Values • Non-Detected Values 4500 4000 3500 3000 ::; "ba 2500 .§. B ~ 2000 '" III 1500 1000 500 0 ~c§> .... '" 80 70 60 ::; 50 "ba .:: E 40 '" '" ~ ::::l 30 20 10 0 ,\OJ I:f 0 /:'b'" ~~ Time concentration plots for MW·3 Sulfate in MW-3 Sample Date Uranium in MW-3 ~Io c,"'~' ,p,~ ~OJ'" ~'1 ~ ~'" ~<S .... '" Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • Detected Values • Non·Detected Values :;- "iia .§. II ~ .2 .c c.J :;-"iia E- li "CI 'C 0 " ii: Time concentration plots for MW-3A Chloride in MW-3A 80 70 ~ ~ ..-.... 60 '-..,/' V "'-/' 50 40 30 20 10 0 ~'" \,,<' 1.8 1.6 1.4 1.2 0.8 0.6 0.4 0.2 0 ~'" ~ \,,<' ,<'" ... Sample Date Fluoride in MW-3A !:)'o .,,,,~ s-,-,i' '{o<l ~o Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • Detecte(l Values • Non·Detect<!d Values ::; ~ .§. OJ ... ~ :::I III ::; -~ E :::I ·c I! ::I Time concentration plots for MW-3A Sulfate in MW-3A 3900 3800 3700 3600 3500 3400 3300 3200 .. ~----~-----.------~----~-----.------r-----~-----.------ 40 35 30 25 20 15 10 o ",,<:>'? .... '" Sample Date Uranium in MW-3A "'-. / ~ ~~ ~o ~ ""\. ~ ...... Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 _J • Detected Values • Non·Oetecll!d Value5 :=-'& tE§ IntiC:rA ~=~ ::; Oil .§. .. ~ ·c .2 ..r::. u ::; -.. .§. .. :2 (; .. i.: 80 70 60 50 40 30 20 10 0 ",<§' 'b'" " .J:o'" 0" 1.8 1.6 1.4 1.2 t 0.8 0.6 l 0.4 0.2 o Time concentration plots for MW·5 Chloride in MW-S ~ ,,01 Sample Date Fluoride in MW-S .It / -..N Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 ~ .., '""," • Detected Valuf!s • NDn·o..tecled Values ~~ Inti:=t.l ;;;s.!: ~ Time concentration plots for MW-5 Sulfate in MW-S 1600 1400 1200 ~ 1000 "Oa oS 800 :l ~ ,. 11\ 600 400 200 0 ",<§> .g, ~ " ,,01 ~'" 0" Sample Date Uranium in MW-S 7 6 t-----------------------------------------------~ ~ 5 t-----------------------------------------------~ } § 4 t-------------------------------------------------------~ 'c e ::J 3 o Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • Detected Values • Non-Detected Values 45 40 35 30 ~ "Oa 25 g ... ~ 20 .5Z .c u 15 10 5 0 'tJ'\, ,,; <;)" 1.2 1 0.8 ~ "Oa g ... 0.6 ~ 0 :::0 u:: 0.4 0.2 o 'tJ'a !:< ..,<i Time concentration plots for MW-11 Chloride in MW-ll ,,;q,o, <;;>" Sample Date Fluoride in MW-ll Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 ~ 11 !~'~ • I;letectell Values • Non-Detected Values Time concentration plots for MW-11 Sulfate in MW-11 1400 1000 ~ oa 800 .§. B "' :I:: 600 = 11\ 400 200 • 0 ~'1, ~'" ~o, <: ~ <: <;)'" .... .:s <;)<zi Sample Date Uranium in MW-ll 8 7 6 t----------------------------------------------------I ~ 5 ~ E 4 = 'c I! ~ 3 2 o Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • Detl!cte(i Values • Non-Detected Values 90 80 70 60 ::r ~ 50 -8 ·c 40 ,g .c u 30 20 10 0 ..:~ ~,. 2.5 2 ::r 1.5 Oa .§. OJ ~ 0 " i:i: 0.5 o '0'0 ,,01 Time concentration plots for MW-12 ,if ~o Chloride in MW-12 Sample Date Fluoride in MW-12 Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 ..... --rr ~ • Demcte(l Values • Non-Detected Value!> -:;--.a .s. !l £ :::s III -:;-~ E :::s '2 f! :l Time concentration plots for MW-12 Sulfate in MW-12 3000 2500 2000 1500 1000 500 o +---~----~----~---T----~----~---T----~--~----~ 20 15 10 5 Sample Date Uranium in MW-12 Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • l;letected Values • Non-Detected Value!; ::; Iia .5. .. ~ .2 .r. u ::; Iia .5. .. "0 .;: 0 ::I u:: Time concentration plots for MW·14 Chloride in MW-14 30 25 20 15 10 5 Sample Date Fluoride in MW-14 0.25 r ------------------------------. 0.2 0.15 0.1 0.05 o Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • Detected Valug • Non-Detected Values ~ ~ .§. II Jg = III ~ } e = "2 I! :::l Time concentration plots for MW-14 Sulfate in MW-14 2500 1500 1000 500 o Sample Date Uranium in MW-14 120 100 80 60 40 20 o +-----~----r---~r----,----~----_r----_.----,_----~----r_----I ('f'bOJ o Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • Detl!cte(i V~lues • Non-Detected Values ~~ Inte=tA ~ mil= ::; Ii3 .§. II ~ .2 ~ u ::; Ii3 .§. OJ ~ 0 ::I ii: 60 50 40 30 20 10 2.5 2 1.5 1 0.5 a ",cf' ~ <;)"'v ~'1> Time concentration plots for MW-15 Chloride in MW-1S Sample Date Fluoride in MW-1S ~ s;:,"-? s)'> ~ "t''''fJ <! \~ "t'~ <;)'" Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 .:,g> ~'1> ~...,,<:> ~o • Detect_II Valu6 • Non-Detectt!d Values :::i" "Oa .§. :! ~ ,. '" :::i" } E ,. 'r: I! :::J Time concentration plots for MW-15 Sulfate in MW-1S 3000 r-------------------------------------------------------------~ 2500 2000 1500 1000 500 o 70 60 50 30 20 Sample Date Uranium in MW-1S Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • Detected Values • Non-Detected Values ::i Oa .§. ell ~ ~ .I:. U ::i Oa .§. ell :2 ~ ..2 "- Time concentration plots for MW-17 Chloride in MW-17 60 30 20 10 a ~--~ __ --~----~----~----~--~----~----~----I 2.5 2 1.5 1 0.5 ....... -- a Sample Date Fluoride in MW-17 -~ Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 ~ .... • Detecte(l Values • Non-Detected Values 2500 'j 'Qa 2000 .§. !! :l! 1500 ,. '" 1000 500 50 45 40 35 'j 30 } E 25 ,. C I! 20 ::J 15 10 5 0 1:0,'" ~'Ij 1:0,<' ~'Ij Time concentration plots for MW-17 Sulfate in MW-17 Sample Date Uranium in MW-17 1:';;' '?Jo, ~'Ij '<~ Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • Detected Values • Non-Detected Value,; 80 70 60 :::i' 50 IilI .§. II ~ 40 ~ .s::. U 30 20 10 0 .:",,,, ~ .. ,Y'J" ~,. 0.5 0.45 0.4 0.35 ~ :::i' 0.3 IilI .§. II 0.25 "D ·c Q ::I 0.2 ;:;: 0.15 0.1 0.05 o Time concentration plots for MW-18 Chloride in MW-18 ~ 9)'" ",<1 :<$ ",0; Sample Date Fluoride in MW-18 .-""1 '" ~ \ t.. \ 1~ ..... Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 "'\:..----... ./ ..... • Detectell Values • Non-Detected Valul!5 ~ 'iia .5. II .. :l!l ,. "" ~ .... .=: E ,. ·2 I! ::J Time concentration plots for MW·18 Sulfate in MW-18 2500 2000 1500 1000 500 o +---~~---r----~----~--~----~----~--~----~ 60 50 40 30 20 Sample Date Uranium in MW-18 Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • l)etreted Values • Non-Detectrd Values ::J' Da .§. II ~ R ~ u ::J' Da .§. II "Q ·c Q ::I ..: Time concentration plots for MW-19 Chloride in MW-19 120 r-----------------------------------------------------------~ 100 80 60 40 20 o 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 a ,,~ ~'Ii ~t§> 't"V Sample Date Fluoride in MW-19 ,,~ r.: ,,'" ~~. r;f~ ,,'> (f Q'" \V 0 Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • Detected Values • Non-[)etect~ Valu .... Time concentration plots for MWM19 Sulfate in MW-19 3000 2500 2000 ::; ~ .§. 1500 ,! ~ = '" 1000 500 o -.~----~----~----~-----'------r-----~----.r-----r----~ Sample Date Uranium in MW-19 30 25 20 i-----------------~L-------~~-------------------------I ::; } e 15 = '2 I! :J 10 o Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • I)e~cted Values • Non-Detected Values 80 70 60 :J' 50 ~ II 40 :2 .. J! J:. U 30 20 10 0 !'>'" c; ~'" 0.4 0.35 0.3 :J' 0.25 ~ f o ,. 0.2 It 0.15 0.1 0.05 o ,...... Time concentration plots for MW-20 Chloride in MW-20 !'>'" ,;l:l Sample Date Fluoride in MW-20 ... ./ JIll" ./ - ~ Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • Oetec~d Values • Non-Detecb!d Values 4500 4000 3500 3000 ::i' l 2500 S 4! 2000 .. III 1500 1000 500 0 !:l'b ~ ..,.-; 40 35 30 ::i' 25 ~ E 20 .. C ~ ::::I 15 10 5 0 9P' c: <:I'" l'l'" "eq Time concentration plots for MW-20 Sulfate in MW-20 ~ ---./" -r Sample Date Uranium in MW-20 Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 ""-~ • Oetected Values • NDn-Detected Values 80 70 60 ::l' so ~ ,.- III 40 :5! ... .!i .c U 30 20 10 0 r.:",r,. <:;)'" 3.5 3 ...... 2.5 ::l' O! 2 .§. III ~ 0 1.5 :::I Li: o !'J<O c.f<i Time concentration plots for MW-22 Chloride in MW-22 Sample Date Fluoride in MW-22 -1A A. A 'V -v __eo_ r--~ .--A ~ -...." Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 -- • i;)ete<:tell Valul!$ • Non-Detected Valul!5 ~~ IntE=tA ~ ~ ::r "Oa ~ OJ ... ~ '" 11\ ::r } E '" ';: I! ;:) 7000 6000 5000 4000 3000 2000 1000 o 60 50 40 30 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 1st Quarter 2011 ~ • r;>e~cle!l Values • Non-Detected Values Time concentration plots for MW·23 Chloride in MW-23 12 10 8 "3 Oa .§. .. 't:I 6 'I: 0 :E u 4 o ~----~--~----~----,-----~--~----~----~--~ Sample Date Fluoride in MW-23 2,5 2 "3 1.5 -.. .§. .. 't:I 'I: 0 :s i:i: 0,5 ~~ ...... ~ o ):)" ~'o ~'o ~ ~ ~ s;,o, ):)0, 1:0$-~ ,;;:,<:-,,09 <,,,,<1 " ~o"" 'l'q, ,,~ <,,,,q, ,,: ..,~ 'l'q, ~o Sample Date White Mesa Uranium Mill Groundwater Monitoring Report • Detected Value< 1st Quarter 2011 • Non-Detected Value" 3000 2500 2000 ::r ba .§. 1500 S ~ '" 11\ 1000 500 . o 35 30 25 ::r } 20 E '" 'c 15 I! :l 10 5 0 Sl" .,'1.<1 /,'0 t:r9- Time concentration plots for MW·23 Sulfate in MW-Z3 Sample Date Uranium in MW-Z3 ".¢P ~ ~ ~o "><:> Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter ZOl1 • r:>etected V .. lul$ • Non-Detected Values 80 70 60 ::; 50 ~ .§. ~ II 'a 40 '1: 0 :E u 30 20 10 o 0.4 0.35 0.3 ::; 0.25 ~ .§. II 0.2 ~ 0 '" li: 0.15 0.1 0.05 0 1:)<> ~ \;; 5:>'0 "OJ' Time concentration plots for MW-24 Chloride in MW-24 ~ ----" ~ .. Sample Date Fluoride in MW-24 1:)'0 i' ,.~ .,e':l ~q ~o Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • Delecte\l Value5 • Non·Detected Values Time concentration plots for MW-24 Sulfate in MW-24 3500 3000 2500 ~ 'Oa 2000 - E- li .. ~ 1500 = III 1000 500 o i-----r---~----~----~----~----~--~~--~----~ Sample Date Uranium in MW-24 14 12 10 ~ -8 ~ E = ·c 6 I! ~ 4 2 .A \ ~ \ \ I .~ -""" ~ ~ l--.---0 5:)<' ~<:J'o ~ ~ !b 5:)'lJ <:J'" \f~ ,,:.,,><:J ~,,><:J ..; ,,-' <:Je ,>'" ~ so 'o.,<i !: ... '" .,..:s ~'" ~'" ~o Sample Date White Mesa Uranium Mill Groundwater Monitoring Report • Detecte(i Values 1st Quarter 2011 • Non-Detected Values 40 35 ~ 30 ~ 25 ~ .§. .. "0 20 ';: .5! .I:. u 15 10 5 o 0.45 0.4 0.35 0.3 ~ 'iia 0.25 .§. .. "0 ';: 0.2 0 '" ;:;: 0.15 0.1 0.05 0 !:l" ~ )~ Time concentration plots for MW-25 Chloride in MW-2S A ~---J ...... .... " .-.. !:l'o '<~ V Sample Date Fluoride in MW-2S !:l'" ~ &-c.,eQ.· ~ .. ", G <;)'" Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • Dete~te(l Values • Non-Detected Values i i 2500 2000 ~ 1000 Time concentration plots for MW-25 Sulfate in MW-2S 500 1------------------------------1 o Sample Date Uranium in MW-2S 8 7 ~ A A... ~ ~r-\/ ..... V~ ... -~ ... ""' -. 6 ~ 5 ~ E 4 '" 'c ~ ::l 3 2 1 o ~ ~ ~'b Il' !,',,>I:J !,',,>"> \~<:' ~."", ~1f. 't-<:i ~<:i ~." Sample Date White Mesa Uranium Mill Groundwater Monitoring Report • 1st Quarter 2011 • I)e~cte<l Values Non-Detected Values Time concentration plots for MW·26 Chloride in MW-26 90 80 70 60 ~ ~ 50 .5- • J\ A/\ """ ..... -,-vv '7\/. ~ lill 1] .. • • .. :g 40 0 :E u 30 20 10 o Sample Date Fluoride in MW-26 2.5 2 ~ 1,5 -.. .5-.. 'a 'i: 0 :::s 1 u:: 0.5 ~~ ..... ...... -. --..... o Sl'" ~", ~~ ~~., r;:,'o ~ ~'t> l' ~-$' ~'> <,,,,<1 ~ ~ ~'I;.:(, ~ 'l-oS ,,'" "oS ,,'" '1-<1 "1-<1 ~'I; ,,01 Sample Date White Mesa Uranium Mill Groundwater Monitoring Report • r;>etected Values 1st Quarter 2011 • Non-Detected Value]; ::; -.a .5. .. ... 411 ::J 11'1 Time concentration plots for MW-26 Sulfate in MW-26 2500 2000 1500 1000 500 t-------------------------------------------------------------~ o +---~~--~----,_----~--~----_r----~--~~---I Sample Date Uranium in MW-26 Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • Delecte(i ValUe<; • Non-Detected ValUe<; 50 45 40 35 :::;-30 l II 25 ~ .2 .I:: 20 u 15 10 5 o 0.9 0.8 0.7 0.6 :::;- Iia 0.5 E- li ~ '': 0.4 0 ::I ;:;: 0.3 0.2 0.1 o Time concentration plots for MW·27 Chloride in MW-27 ----J\ r-/ JI--..r V i"""'" ................ 'W'" Sample Date Fluoride in MW-27 .... /\~ \~-~~ • Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 " --- • Non·Detected Values ~ ~ II .. ~ ::I 11'1 ~ } E ::I 'c I!! :::l Time concentration plots for MW-27 Sulfate in MW-27 600 500 400 300 200 100 o ~--~~--~----~----~--~----~----~----~--~ 40 35 30 l/\ --. 25 20 15 10 o Sample Date Uranium in MW-27 ~ ~ ~ .... Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 A .... ~ • Detected Values • Non·Detected Values 120 100 80 :::; ~ OJ ~ 60 0 is 40 20 0.8 0.7 0.6 :::; 0.5 .. .§. OJ 0.4 'C '1: 0 '" u:: 0.3 0.2 0.1 0 5l" .... v~ ~ ..,'I>~ Time concentration plots for MW·28 Chloride in MW-28 Sample Date Fluoride in MW-28 ~<o c,<li ~ 51' ,i' ~ ~o Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • Det .. cted V~lul!$ • Non-Detected Valul!$ 2600 2550 2500 2450 ::; ~ 2400 .. ... 411 2350 :::I III 2300 2250 2200 2150 ~., .:r!' ">,,,q .,.Q. Time concentration plots for MW-28 Sulfate in MW-28 ~<o <So ~ ,.; ~ ~o )V )'0<:' Sample Date Uranium in MW-28 Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • Detected Values • Non-Detected Values ::; iia .§. III ~ ,.S! .J:. 1.1 ::; iia .§. III 'C ·c 0 '" u:: Time concentration plots for MW-29 Chloride in MW-29 45 40 35 30 A -V~ .......... --.. / --'" ~/ "'"' 25 20 15 10 5 o Sample Date Fluoride in MW-29 1.2 1 0.8 0.6 0.4 0.2 o ~--~----~----~----~--~ __ --~----~----~--~ Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • Detecte(l Values • Non·Detec~ Values 3000 2950 2900 :::;- ! 2850 :l 4! 2800 .. III 2750 2700 2650 16 14 12 :::;-10 ~ E 8 .. C e :::l 6 4 2 o Time concentration plots for MW-29 Sulfate in MW-29 Sample Date Uranium in MW-29 -'" /" ~ ~ ---------.. -.- / 'fI p ...,'" Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • Detecte(i Values • Non-Detected Values 160 140 ....... 120 r-- ~ 100 ~ .. 80 ~ .2 .c u 60 40 20 o 0.6 0.5 0.4 ~ tia .§. .. 0.3 ... ·c 0 ,. u:: 0.2 0.1 o Time concentration plots for MW-30 --..... Chloride in MW-30 -----~ A. .,.. --~ Sample Date Fluoride in MW-30 Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 Al ~ .. \1\/ -r • Detecte<l Values • Non·Dete~ted Valu .... ::r l II ... !l! .. III Time concentration plots for MW-30 Sulfate in MW-30 1200 1000 800 v---A .... ~ ----........... -~ ~--V 600 400 200 a Sample Date Uranium in MW-30 9 /\ -rc... --'"' 8 II y ~ .... -... ...... --" 7 3 a Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • De~cted Values • Non-Detected lIalues 160 140 120 =-100 } .. 80 l! .. .5l .c 1.1 60 40 20 o 2.5 =-1.5 Iia E. .. ... "I: 0 :::I 1 Li: .A. ,... ..... 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 1st Quarter 2011 -...... ...... • Oetecte(l Values • Non-Detected Values 600 500 .... V~ 400 ::r ~ .§. 300 .. i ::I III 200 100 o 10 9 8 7 ,./ V ::r 6 } E 5 ::I '2 f! 4 ::J 3 2 1 o Time concentration plots for MW-31 - Sulfate in MW-31 .... -"\. -----/\ ------v Sample Date Uranium in MW-31 ~ ... ~ .,... Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 ... ~ --'" -...A. ~ " • Detected Values • Non-Detected Values ~ IntiC=tA ~~ =r ~ .s II 'a .;: 0 :E U =r Oi .s II ~ 0 ::I ;:;: 40 35 30 25 20 15 10 5 0 ~'" c.,"'~ 2.5 2 1.5 1 0.5 o 5:>'" 'l-~-';' Time concentration plots for MW-32 Chloride in MW-32 Sample Date Fluoride in MW-32 ----.. Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • Detected Values • NDn-Detectl!d Values ~ Ini:~~A ~~ Time concentration plots for MW-32 Sulfate in MW-32 3000 2500 2000 ....... ]i... ~ ~ --'-\r-.... "Y ,... • ::r ~ 1500 S !Ill ::I III 1000 SOD o Sample Date Uranium in MW-32 6 ~----------------------------------------------~ 5 i E 3 .: c I! :::l 2 ~~=------------------------------------=~~~ o Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • Detected V~lues • Non-Detected Values 80 70 60 :::; 50 "Oa .5- II :5! 40 .2 is 30 20 10 0 0.6 0.5 0.4 :::; "Oa .5- II 0.3 "a .~ " ii: 0.2 0.1 0 .. - • Time concentration plots for MW-34 Chloride in MW-34 Sample Date Fluoride in MW-34 Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 -- • • Detected Values • Non-Detected Values Time concentration plots for MW-34 Sulfate in MW-34 2500 • • 2000 1-----------------------------------------------~------1 l1500 I Jl 1000 500 o ~----------~----------~----------~--------~ Sample Date Uranium in MW-34 30 - 25 - 20 10 t--------------------------------------------------------I 5 o Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • Detected Values • Non-Detected Values Time concentration plots for MW-35 Chloride in MW-35 80 70 ~ 60 -;; 50 ~ "iia ~ ~ f 40 oS! J:. \"I 30 20 10 0 § ~"" ~"" <: <:;," ,,,,<:< ,,# Sample Date Fluoride in MW-35 OA5 0.4 ..... ~ 0.35 ------. 0.3 -;; "iia 0.25 ~ III ~ 0.2 r!l il: 0.15 0.1 0.05 0 ~<:l ~'" ~'" <: <:;," 5:' ,,# \'" Sample Date White Mesa Uranium Mill Groundwater Monitoring Report • Detected Values 1st Quarter 2011 • Non-Detected Values ::l" iii .s II ... ~ ::0 '" ::l" iii .s E ::0 'c I! ::::I Time concentration plots for MW-35 Sulfate in MW-35 2500 2000 •. r---------------~~~--------------------------------~ 1500 1000 500 t-----------------------------------------------------~ 30 25 20 15 10 5 0 o +-----------------------------~----------------------------r_------------------------~ Sample Date Uranium in MW-35 Sample Date White Mesa Uranium Mill Groundwater Monitoring Report 1st Quarter 2011 • Detected Values • Non-Detected Values Tab J CSV Transmittal Letter Kathy Weinel From: Sent: To: Cc: Subject: Attachments: Dear Mr. Lundberg, Kathy Weinel Friday, May 20, 2011 12:39 PM rlundberg@utah.gov 'Phillip Goble'; David Frydenlund; Jo Ann Tischler Transmittal of CSV Files White Mesa Mill 2011 Q1 Groundwater Monitoring C11010389(1 ).CSV; C11020163.CSV; C11020352(1 ).CSV; C11020544.CSV; C11030538.CSV; 11 01179-CSV EDD.csv; 11 02080-EDD-CSV.csv; 11 02168-EDD.csv; 1102272-EDD.csv; 1103272-EDD CSV.csv Attached to this e-mail is an electronic copy of laboratory results for groundwater monitoring conducted at the White Mesa Mill during the first quarter of 2011, 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