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Home My WebLink AboutDRC-2011-007634 - 0901a0688029173cDENISO MINES Z\ MZ:\ Sent VIA Federal Express November 23, 2010 Mr. Rusty Lundberg Co-Executive Secretary Utah Water Quality Board Utah Department of Environmental Quality 195 North 1950 West P.O. Box 144810 Salt Lake City, UT 84114-4820 Denison IMines (USA) Corp. 1050 17th Street, Suite 950 Denver, CO 80265 USA Tel ; 303 628-7798 Fax:303 389-4125 www.denis0nmines.com Re: Transmittal of Annual Seeps and Springs Monitoring Report Groundwater Quality Discharge Permit UGW370004 White Mesa Uranium Mil! Dear Mr. Lundberg: Enclosed are two copies of the White Mesa Uranium Mill Annual Seeps and Springs Monitoring = Report for 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. YoursMry fruly, INES (USA) CORP. Jo Ann trisdhler Director, Compliance and Permitting CC: Ron F. Hochstein David C. Frydenlund Harold R. Roberts David E. Turk Kathy Weinel OENISOJ)~~ MINES Sent VIA Federal Express November 23,2010 Mr. Rusty Lundberg Co-Executive Secretary Utah Water Quality Board Utah Department of Environmental Quality 195 North 1950 West P.O. Box 144810 Salt Lake City, UT 84114-4820 Re: Transmittal of Annual Seeps and Springs Monitoring Report Denison Mines (USA) Corp. 1050 17th Street, Su ite 950 Denver, CO 80265 USA Tel: 303628-7798 Fax: 303389-4125 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 Annual Seeps and Springs Monitoring Report for 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. DE INES (USA) CORP. p JO Ann ischler Director, Compliance and Permitting CC: Ron F. Hochstein David C. Frydenlund Harold R. Roberts David E. Turk Kathy Weinel White Mesa Uranium Mill 2011 Annual Seeps and Springs Sampling Report State of Utah Groundwater Discharge Permit No. UGW370004 Prepared by: Denison Mines (USA) Corp. 1050 17th Street, Suite 950 Denver CO 80265 November 23, 2011 Contents 1.0 IN"TRODUCTION ................................................................................................................................... 1 1.1 Sampling Plan Revisions ..................................................................................................................... 1 2. 0 SAMPLIN"G EVENTS ........................................................................................................................... 1 2.1 May 2011 Sampling ............................................................................................................................ 1 2.2 July 2011 Sampling ............................................................................................................................. 1 2.3 Repeat Visits to Dry Seeps and Springs ............................................................................................. 2 2.4 Sampling Procedures ........................................................................................................................... 2 2.5 Field Data ............................................................................................................................................ 4 2.6 Field QC Samples ................................................................................................................................ 4 3.0 SEEPS AND SPRIN"GS SURVEY AND CONTOUR MAP ................................................................. .4 4.0 QUALITY ASSURANCE AND QUALITY CONTROL ...................................................................... 5 4.1 Laboratory Results .............................................................................................................................. 5 4.2 DATA EVALUATION ....................................................................................................................... 5 4.3 Adherence to Sampling Plan and Permit Requirements ...................................................................... 6 4.4 Analyte Completeness Review ............................................................................................................ 6 4.5 Data Validation ................................................................................................................................... 6 4.5.1 Field Data QNQC Evaluation ..................................................................................................... 6 4.5.2 Holding Time Evaluation ............................................................................................................. 7 4.5.3 Laboratory Receipt Temperature Check ...................................................................................... 7 4.5.4 Analytical Method Check ............................................................................................................. 7 4.5.5 Reporting Limit Evaluation .......................................................................................................... 7 4.5.6 Trip Blank Evaluation .................................................................................................................. 7 4.5.7 QNQC Evaluation for Sample Duplicates ................................................................................... 7 4.5.8 Radiologics Counting Error .......................................................................................................... 8 4.5.9 Laboratory Matrix QC Evaluation ................................................................................................ 8 5.0 EVALUATION OF ANALYTICAL DATA ....................................................................................... 10 5.1 Evaluation of Analytical Results ....................................................................................................... 10 5.1.1 Ruin Spring ................................................................................................................................ 10 5.1.2 Cottonwood Seep ....................................................................................................................... 11 5.1.3 Westwater Seep .......................................................................................................................... 11 5.1.4 Entrance Spring .......................................................................................................................... 12 6.0 CORRECTIVE ACTION REPORT ..................................................................................................... 12 6.1 Assessment of Corrective Actions from Previous Period ................................................................. 12 7.0 ELECTRONIC DATA FILES AND FORMAT ................................................................................... 12 8.0 SIGNATURE AND CERTIFICATION ............................................................................................... 14 ii N:\Required Reports\Seeps and Springs Sampling Report\2011\20Il Annual Report -text.docx Table 1 Table 2A Table 2B Table 2C Table 2D LIST OF TABLES Summary of Seeps and Springs Sampling for 2011 Detected Constituents and Comparison to Historic Values and Mill Site Monitoring Wells -Ruin Spring Detected Constituents and Comparison to Historic Values and Mill Site Monitoring Wells -Cottonwood Seep Detected Constituents and Comparison to Historic Values and Mill Site Monitoring Wells -Westwater Seep Detected Constituents and Comparison to Historic Values and Mill Site Monitoring Wells -Entrance Spring INDEX OF TABS Tab A Seeps and Springs Field Data Sheets and Photographic Documentation Tab B Field Parameter Measurement Data Tab C Survey Data and Contour Map Tab D Analytical Laboratory Data Tab E Quality Assurance and Data Validation Tables E-l Holding Time Evaluation E-2 Laboratory Receipt Temperature Check E-3 Analytical Method Check E-4 Reporting Limit Evaluation E-5 Trip Blank Evaluation E-6 QAlQC Evaluation for Sample Duplicates E-7 Radiologics Counting Error E-8 Laboratory Matrix QC Evaluation Tab F CSV Transmittal Tab G DRC Correspondence Regarding Annual Seeps and Springs Reports and Data Use III N:\Required Reports\Seeps and Springs Sampling Report\201 1\201 I Annual Report -text.docx 2011 ANNUAL SEEPS AND SPRINGS SAMPLING REPORT 1.0 INTRODUCTION This is the 2011 Annual Seeps and Springs Sampling Report for the Denison Mines (USA) Corp. ("Denison") White Mesa Mill (the "Mill"), as required under Part I.F.7 of the Mill's State of Utah Groundwater Discharge Permit No. UGW370004 (the "Permit") and Section 6.0 of the Mill's Sampling Plan for Seeps and Springs in the Vicinity of the White Mesa Uranium Mill, Revision: 0, March 17, 2009 (the "Sampling Plan") and Revision 1, June 10, 2011 ("Draft Sampling Plan"). 1.1 Sampling Plan Revisions The Sampling Plan for Seeps and Springs in the Vicinity of the White Mesa Uranium Mill, was revised during the 2011 reporting period. The revisions were completed to address corrective actions delineated in the 2010 Annual Seeps and Springs Sampling Report for the Mill. The Draft Sampling Plan was submitted to the Utah Division of Radiation Control ("DRC") via e- mail for review on June 10, 2011. Per conversations with DRC personnel on June 28, 2011, regarding the July sampling event, Denison used the 2011 Draft Sampling Plan field forms for the July sampling event even though the 2011 Draft Sampling Plan had not received DRC approval at the time of the sampling event. To date comments have not been received from DRC on the Draft Sampling Plan. 2. 0 SAMPLING EVENTS Seeps and springs which were identified near the Mill in the 1978 Environmental Report (Plate 2.6-10, Dames and Moore, January 30, 1978) are to be sampled annually in accordance with the Sampling Plan and Part I.E.6 of the Permit. The Sampling Plan specifies the following sample locations: Corral Canyon Seep, Corral Springs, Ruin Spring, Cottonwood Seep, Westwater Seep and Entrance Spring. 2.1 May 2011 Sampling On May 31, 2011 Denison collected seeps and springs samples from Cottonwood Seep, Westwater Seep, Ruin Spring, Back Spring (duplicate sample of Ruin Spring), and Entrance Spring. Corral Canyon Seep and Corral Springs were both dry at the time of this sampling event. Denison inadvertently failed to notify DRC in advance of this sampling event and DRC personnel were not present to collect split samples. Denison notified DRC of the inadvertent omission of the notification and DRC requested that Denison resample the seeps and springs locations. Per the DRC request, Denison provided the appropriate notification and resampled the seeps and springs locations in July 2011. 2.2 July 2011 Sampling In accordance with the Permit and the Sampling Plan, DRC was notified of the sampling. The DRC representative was present for this sampling event. On July 13, 2011, Denison collected 1 N:\Required Reports\Seeps and Springs Sampling Report\2011\2011 Annual Report -text.docx seeps and springs samples from Cottonwood Seep, Ruin Spring, Back Spring (duplicate sample of Ruin Spring), and Entrance Spring. The DRC representative collected a "split" sample on July 13,2011 at Entrance Spring from the Denison sampling equipment, using sample containers he provided. Corral Canyon Seep, Westwater Seep, and Corral Springs were all dry on July 14, 2011. During this sampling event, the DRC representative stated that since Westwater Seep was dry in July, the May 2011 sample could be used for reporting purposes. E-mail correspondence from the DRC Representative authorizing the use of the May 2011 Westwater data is Attached in Tab G. All of the data from both the May and July sampling events are included in this report. 2.3 Repeat Visits to Dry Seeps and Springs. During the July 14, 2010 sampling event, Westwater Seep, Corral Canyon Seep and Corral Springs were dry, could not be sampled, and did not warrant development attempts with limited hand tool excavation at that time. Additional visits were made to these locations on July 21, 2011 and August 4,2011 to determine if development attempts with hand tool excavation would yield enough water for sampling. The additional two visits did not indicate any changes; that is there was no indication that development attempts would be successful. 2.4 Sampling Procedures Samples were collected and analyzed for the parameters listed in Table 2 of the Permit. During the May and July sampling events, samples were collected from the locations indicated in Table 1. Sampling procedures for each seep or spring are determined by the site location and access. The sampling procedures used during the 2011 sampling event differ from those listed in the approved Sampling Plan, Revision 0; however, sampling procedures used in 2011 are the same as those used in 2009 and 2010. The procedures used in all previous sampling events are described in the 2010 Annual Seeps and Springs Sampling Report for the Mill. Denison employed the previous sampling procedures again in 2011, because the 2009 and 2010 Annual Seeps and Springs Sampling Reports for the Mill were inspected by DRC and determined to be in compliance with the GWDP. A closeout letter, stating compliance with the GWDP, was issued by DRC on August 30, 2011. The closeout correspondence is included in Tab G. The sampling procedures used in 2011 and in all previous sampling events differ from those in the Sampling Plan, Revision 0, because the procedures in the Sampling Plan, Revision 0, do not match the site conditions and do not include the use of a peristaltic pump for sampling or filtering samples for metals and gross alpha analyses. As previously stated, and as specified in the 2010 Annual Seeps and Springs Sampling Report for the Mill, the Sampling Plan, Revision 0, was revised to provide flexibility in sampling procedures to address differing site conditions as well as to correct several inconsistencies noted during the 2010 report preparation and review. Denison provided detailed descriptions of the sampling procedures used in 2010 in the 2010 Annual Seeps and Springs Sampling Report for the Mill, which was accepted by DRC. Additionally, DRC was present during both the 2010 and 2011 sampling events and did not provide comments noting that the procedures used were unacceptable. Since DRC has not 2 N :\Required Rep0l1s\Seeps and Springs Sampling Report\20 11 \20 II Annual Report -text.docx commented on the seeps and springs sampling procedures that were used in 2010 and 2011, Denison has continued using the procedures implemented in 2010. Ruin Spring In the case of Ruin Spring, sample bottles for all analytes during both the May and July sampling events (except gross alpha and heavy metals) were filled directly from the spring out-flow which is a pipe. Heavy metals and gross alpha were collected by means of a peristaltic pump and delivered directly to the sample containers through a 0.45 micron filter. The appropriate preservatives for the analytical technique were added to the samples. Westwater Seep For the May 2011 sample collected from the Westwater Seep, all of the sample containers were filled by dipping the bottles into the excavation except for the containers for gross alpha and heavy metals. For the gross alpha and heavy metals samples, a clean previously unused one gallon sample jug was filled by dipping it into the pool at Westwater Seep. The peristaltic pump was used to transfer the samples from the one gallon jug directly to the sample containers through a 0.45 micron filter. The appropriate preservatives for the analytical technique were added to the samples. In May 2011, Denison received authorization from the Bureau of Land management ("BLM") to collect samples on public lands administered by BLM adjacent to the Mill. Per the authorization letter, BLM requested that any test holes necessary to collect samples, be filled in at the completion of sampling activities. Pursuant to this request, the test hole dug to collect a sample at Westwater Seep in May 2011, was filled in upon completion of sampling activities. Cottonwood Seep and Entrance Spring For both the May and July samples collected from Cottonwood Seep and Entrance Spring, the samples for all analytes except gross alpha and heavy metals were collected by means of a peristaltic pump and delivered directly to the sample containers. In the case of the samples for heavy metals and gross alpha, the samples were delivered by a peristaltic pump directly to the sample containers through a 0.45 micron filter. All samples were preserved by the addition of the appropriate preservative for the analytical technique. The tubing on the peristaltic pump that comes into contact with the sample water was disposed of between each sampling. As a result, no equipment required decontamination, and no rinsate samples were collected. All samples were stored at 6° C or less prior to laboratory analysis. Samples were received by the Mill's contract laboratories, Energy Laboratories ("EL") at 2.2 and 3.4 ° C and America West Analytical Laboratories ("A W AL") at 4.4 and 3.4 ° C. 3 N :\Required Reports\Seeps and Springs Sampling Report\20 II \20 II Annual Report -text.docx 2.5 Field Data Attached under Tab A are copies of all of the field data sheets recorded in association with the May and July seeps and springs monitoring events. Photographic documentation of the sampling sites is also included in Tab A. Sampling dates are listed in Table 1 and field parameters collected during the sampling program are included in Tab B. 2.6 Field QC Samples The field Quality Control ("QC") samples generated during this sampling event included one duplicate per sampling event and one trip blank per shipment to each laboratory which received samples for Volatile Organic Compounds (VOCs). The duplicate samples (Back Spring) were submitted blind to the analytical laboratory. As previously stated, no rinsate blanks were collected during this sampling event as only disposable equipment was used for sample collection. 3.0 SEEPS AND SPRINGS SURVEY AND CONTOUR MAP Part I.F.7(c) of the Permit requires that a water table contour map that includes the elevations for each well at the facility and the elevations of the phreatic surfaces observed for each of the seeps and springs sampled be submitted with this annual report. Tab C includes two contour maps. The contour map labeled C-1, shows the water table without the water level data associated with the dry ridge ("DR") investigation piezometers. The contour map labeled C-2 shows the water table with the water level data associated with the DR investigation piezometers. It is important to note that Cottonwood Seep is not included in any of the contouring because it is not part of the perched water system. Exclusion of the Cottonwood Seep is consistent with previous submissions. The contour map includes the corrected survey data from December 2009 as discussed below. Part I.F.7 (g) of the Permit requires that survey data for the seeps and springs be submitted. The Permit specifies that the survey data be collected prior to the collection of samples. DRC previously clarified that the requirement to submit survey data applies only to the first sampling event and not on an annual basis. The survey data submitted with the first annual seeps and springs report in early December 2009, which was performed by a State of Utah licensed surveyor, was found to be incorrect. In response to the incorrect data, Denison completed another survey of the seeps and springs in mid-December 2009 by a different State of Utah licensed surveyor who had performed a number of surveys at the site in the past and was therefore familiar with the site. Those survey data are included in Tab C. Additionally, in response to Part I.H.1O (a) of the Permit, Denison verified the seeps and springs survey data in July 2010 by re-surveying Westwater Seep, Cottonwood Seep, and Ruin Spring by the same State of Utah licensed surveyor used for the mid-December 2009 survey. The concurrence between all December 2009 surveyed data and the nearly identical results obtained in July 2010, confirms the elevations of the seeps and springs reported herein. The confirmed December, 2009 seep and spring survey data shown in Tab C will be used in all future reporting where seep and spring locations and elevations are relevant. 4 N:\Required Reports\Seeps and Spdngs Sampling Report\2011\2011 Annual Report -text.docx A full discussion of the verification of the December 2009 survey data and the hydrogeology of seeps and springs at the margins of White Mesa in the vicinity of the Mill and the relationship of these seeps and springs to the hydrogeology of the site, in particular to the occurrence of a relatively shallow perched groundwater zone beneath the site, is contained in Hydrogeology of the Perched Groundwater Zone and Associated Seeps and Springs Near the White Mesa Uranium Mill Site, dated November 12,2010, prepared by Hydro Geo Chern, Inc. and submitted to the Executive Secretary on November 15,2010. 4.0 QUALITY ASSURANCE AND QUALITY CONTROL 4.1 Laboratory Results All analytical results are provided by one of the Mill's two contract analytical laboratories EL or AWAL. The laboratories utilized during this investigation were certified under the Environmental Lab Certification Program administered by UDEQ Bureau of Lab Improvement for the analyses they completed. The analytical data as well as the laboratory QNQC summaries are included under Tab D. 4.2 DATA EVALUATION The Permit requires that the annual seeps and springs sampling program be conducted in compliance with the requirements specified in the Mill's approved White Mesa Uranium Mill Groundwater Monitoring Quality Assurance Plan ("QAP"), the approved Sampling Plan and the Permit itself. To meet this requirement the data validation completed for the seeps and springs sampling program as discussed in this section utilized the requirements outlined in the QAP, the Permit and the approved Sampling Plan as necessary. The 2010 Annual Seeps and Springs Monitoring Report noted that in several places the requirements in the QAP, and Sampling Plan, Revision 0, were in conflict. To address these inconsistencies, the Sampling Plan, Revision 0 was revised and, as previously stated, submitted to DRC for review in June 2011. For the purposes of this data review, the Permit and the QAP requirements were used to determine compliance. The Mill QA Manager performed a QNQC review to confirm compliance of the monitoring program with requirements of the Permit and 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 4.5.l. Discussion of adherence to the Sampling Plan is provided in Section 4.3. Analytical completeness review results are provided in Section 4.4. The steps and tests applied to check laboratory data QNQC are discussed in Sections 4.5.1 through 4.5.9 below. The analytical laboratories have provided summary reports of the analytical QNQC measurements necessary to maintain conformance with National Environmental Laboratory Accreditation Conference ("NELAC") certification and reporting protocol. The analytical 5 N:\Required Reports\Seeps and SpIings Sampling Report\2011\2011 Annual Report -text.docx laboratory QAlQC Summary Reports, including copies of the Mill's Chain of Custody and Analytical Request Record forms for each set of analytical results, follow the analytical results under Tab D. Results of review of the laboratory QAlQC information are provided under Tab E and discussed in Section 4.5 below. 4.3 Adherence to Sampling Plan and Permit Requirements On a review of adherence by Mill personnel to the Permit, the QA Manager observed that QAlQC requirements established in the Permit and the QAP were being adhered to and that the requirements were implemented as required except, as noted below. Sampling procedures varied from those contemplated in the Revision 0, Sampling Plan as discussed in the 2010 Annual Seeps and Springs Sampling Report for the Mill. As previously stated, the Sampling Plan, Revision 0 was revised in June 2011 to accurately reflect the sampling procedures used during the 2009, 2010 and 2011 sampling events. DRC has not provided comments on the Sampling Plan to date; however, the DRC representative was present for both the 2010 and 2011 sampling programs and observed the sampling procedures used. The DRC representative accepted the procedures and made no comments regarding the sampling strategies employed. No further discussions regarding the changes to the Revision 0 Sampling Plan sampling procedures are included. Field parameter measurements collected during this sampling event included pH, conductivity, temperature, redox potential (July samples only), and turbidity (July samples only). The Permit only requires the collection of pH, conductivity and temperature. The deviation consisted of the collection of additional data, and resulted in no effect on the usability of the data. 4.4 Analyte Completeness Review All analyses required by the Permit Table 2 were completed. 4.5 Data Validation The QAP and the Permit identify the data validation steps and data quality control checks required for the seeps and springs monitoring program. Consistent with these requirements, the QA Manager performed the following evaluations: a field data QAlQC evaluation, a receipt temperature check, a holding time check, an analytical method check, a reporting limit check, a trip blank check, a QAlQC evaluation of sample duplicates, a gross alpha counting error evaluation and a review of each laboratory's reported QAlQC information. Each evaluation is discussed in the following sections. Data check tables indicating the results of each test are provided under Tab E. 4.5.1 Field Data QAlQC Evaluation The QA Manager performs a review of all field recorded parameters to assess their adherence with QAP and Permit requirements. The assessment involved review of the Field Data sheets. 6 N:\Required Reports\Seeps and Springs Sampling Report\2011\2011 Annual Report· text.docx Review of the Field Data Sheets noted that all requirements for field data collection were met except as set out below. 4.5.2 Holding Time Evaluation QAP Table 1 identifies the method holding times for each suite of parameters. Sample holding time checks are provided under Tab E. All samples were received and analyzed within the required holding time. 4.5.3 Laboratory Receipt Temperature Check Chain of Custody sheets were reviewed to confirm compliance with the sample receipt requirements specified in the QAP. Sample receipt temperature checks are provided under Tab E. All samples were received within the QAP required temperature limit. 4.5.4 Analytical Method Check 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 E. 4.5.5 Reporting Limit Evaluation Reporting limits utilized by the laboratory were required not to exceed the Ground Water Quality Standards set out in Table 2 of the Permit. For TDS, sulfate and chloride, for which Ground Water Quality Standards are not set out in Table 2 of the Permit, reporting limits of no greater than 10 mg/L, 1 mg/L and 1 mg/L, respectively, were used. All analytical method reporting limits reported by both laboratories were checked against the reporting limits specified in the Permit. Reporting limit evaluations are provided in Tab E. All analytes were measured and reported to the required reporting limits except that the sulfate sample results had the reporting limit raised for samples due to sample dilution necessary to accommodate the sulfate concentrations in the samples. In all cases the reported value for the analyte was higher than the increased detection limit. 4.5.6 Trip Blank Evaluation All trip blank results were reviewed to identify any blank contamination. Trip blank evaluations are provided in Tab E. All trip blank results associated with the samples were less than reporting limit for all VOCs. 4.5.7 QAlQC Evaluation for Sample Duplicates Section 9.1.4 a) of the QAP states that the Relative Percent Difference ("RPD") 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 7 N:\Required Reports\Seeps and Springs Sampling Report\2011\2011 Annual RepOlt -text.docx Guidelines for Inorganic Data Review, February 1994, 9240.1-05-01 as cited in the QAP. The RPDs are calculated for all duplicate pairs for all analytes regardless of whether or not the reported concentrations are greater than 5 times the required detection limits; however, data will be considered noncompliant only when the results are greater than 5 times the required detection limit and the RPD is greater than 20%. RPDs are also only calculated when both the sample and the duplicate report a detection for any given analyte. If only one of the pair reports a detection, the RPD cannot be calculated. The additional duplicate information is provided for information purposes. All duplicate results were within a 20% RPD in the seeps and springs samples except chloride in the Ruin Spring/Back Spring duplicate pair in both the May and July sampling events. The chloride duplicate RPDs greater than 20% are most likely due to some naturally occurring interference present in the samples. Results of the RPD test are provided under Tab E. 4.5.8 Radiologies Counting Error Section 9.14 of the QAP requires that all gross alpha analysis reported with an activity equal to or greater than the Groundwater Compliance Limits ("GWCL") set out in the Permit (for the seeps and springs samples the Groundwater Quality Standards [" GWQS"] will be used), shall have a counting variance that is equal to or less than 20% of the reported activity concentration. An error term may be greater than 20% of the reported activity concentration when the sum of the activity concentration and error term is less than or equal to the GWQS. Section 9.4 of the QAP also requires a comparability check between the sample and field duplicate sample results utilizing the formula provided in the text. Results of routine radiologic sample QC are provided under Tab E. All seeps and springs radiologic sample results that had positive detections met the QAP specified criteria for radiological counting error. The duplicate samples were nondetect, and as such the duplicate comparability check specified in the QAP does not apply. 4.5.9 Laboratory Matrix QC Evaluation 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, Denison'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 E. All lab QAlQC results from both EL and A W AL met these requirements except as described below. 8 N:\Required Reports\Seeps and Springs Sampling Report\2011\201l Annual Report -text.docx A significant number of the seeps and springs samples had the reporting limit raised for multiple analytes due to matrix interference and/or sample dilution. In all cases where the detection limit was increased, the concentration for the analyte was higher than the increased detection limit. The check samples included at least the following: a method blank, a laboratory control spike ("LCS"), a matrix spike ("MS") and a matrix spike duplicate ("MSD"), or the equivalent, where applicable. It should be noted that: • Laboratory fortified blanks are equivalent to LCSs. • Laboratory reagent blanks are equivalent to method blanks. • Post digestion spikes are equivalent to MSs. • Post digestion spike duplicates are equivalent to MSDs. • For method E900.1, used to determine gross alpha, a sample duplicate was used instead ofaMSD. All qualifiers, and the corresponding explanations reported in the QAlQC 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 MSIMSD (referred to as a 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 MSIMSD pair be prepared on Denison 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 MSIMSD pair with each analytical batch was met. While the QAP does not require it, the recoveries were reviewed for compliance with each laboratory's established acceptance limits. The QAP does not require this level of review and the results of this review are provided for information only. The information from the Laboratory QAlQC Summary Reports indicates that the MSIMSDs recoveries and the associated RPDs for all seeps and springs samples were within acceptable laboratory limits except as noted in Tab E. The recoveries which are outside the laboratory established acceptance limits do not affect the quality or usability of the data because the recoveries outside of the acceptance limits are indicative of matrix interference. Matrix interferences are applicable to the individual sample results only. Furthermore, the MS/MSD samples for molybdenum, uranium, and selenium which were spiked for the MSIMSD 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 MSIMSD 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 routine quarterly sampling met the requirement specified in the QAP. The information from the Laboratory QAlQC Summary Reports indicates that the surrogate recoveries for all seeps and springs samples were within acceptable laboratory limits for all surrogate compounds. 9 N :\Required RepOlts\Seeps and Springs Sampling Report\20 II \20 II Annual Report -text.docx The QAP Section 8.1.2 requires that each analytical batch shall be accompanied by a reagent blank. Contamination detected in analysis of reagent blanks/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/method blanks. For consistency, the QAP-required evaluation criteria for rinsate blanks will be used. The QAP criteria for rinsate blanks states that nonconformance will exist when blanks are within an order of magnitude of the sample results. Eight analytes were reported in the reagent/method blanks from EL. Reagent/method blank results are included in Tab E. In all cases the reagent/method blank results were less than an order of magnitude relative to the positive sample results or the associated sample results were nondetect. The QAP requirement to analyze a reagent/method blank with each batch and evaluate the results has therefore been completed as required. 5.0 EVALUATION OF ANALYTICAL DATA Analytical Results As previously stated, all samples were analyzed for the groundwater compliance parameters found on Table 2 of the Permit. In addition to these laboratory parameters, the pH, temperature, conductivity, redox potential and turbidity (although not required Redox and turbidity were collected for the July data only) of each sample was measured and recorded in the field. The samples were not analyzed for semi volatile organic compounds. Although the Sampling Plan, Revision 0, currently states that the samples will also be analyzed for semivolatile organic compounds, the Permit was revised to eliminate the requirement for semivolatile analysis. The requirement to analyze the seeps and springs samples for semivolatile organic compounds has also been eliminated from the Draft Sampling Plan, Revision 1. 5.1 Evaluation of Analytical Results The results of the May and July 2011 sampling event show no evidence of Mill influence in the water produced by the seeps and springs sampled. The lack of Mill influence on seeps and springs is indicated by the fact that the parameters detected are within the ranges of concentrations for the on-site monitoring wells and for available historic data for the seeps and springs themselves. For those detected analytes, concentrations are shown in Tables 2A, 2B, 2C, and 2D. The data are compared to available historic data for each seep and spring as well as to on-site monitoring well data. Specific discussions about each seep or spring are included below. 5.1.1 Ruin Spring No VOCs or radiologics were detected. Metals and major ions were the only analytes detected. The metals detections were minimal with only molybdenum, selenium and uranium having positive detections. A comparison of the 2009 and 2010 data to the 2011 data shows that the concentrations of most detected analytes remained approximately the same with only minor changes within the limits of normal analytical deviation. The reported values for chloride, sodium, pH, and uranium increased from the 2009 and 2010 sample results but they are below 10 N:\Required Reports\Seeps and Springs Sampling Report\2011\2011 Annual Report -text.docx the upper range of historic values for the on-site monitoring wells. The differences are not significant and are most likely due to normal fluctuations due to flow rates or seasonal variations due to annual precipitation. Overall, the data reported for Ruin Spring are typical for a surface water sample with no indication of Mill influence. 5.1.2 Cottonwood Seep No VOCs or radiologics were detected. Metals and major ions were the only analytes detected. The metals detections were minimal with only iron (May 2011 only) and uranium having positive detections. A comparison of the 2009 and 2010 data to the 2011 data shows that the concentrations of most detected analytes remained approximately the same with only minor changes within the limits of normal analytical deviation. The reported values for carbonate, calcium, chloride, magnesium, potassium, sodium, pH, TDS, iron and uranium increased from the 2009 and 2010 sample results. In most cases the increases were minimal and within the range of analytical deviation (e.g. magnesium increased 0.2 mg/L). In all cases the detections are significantly below the upper range of historic values for the on-site monitoring wells. A comparison of the 2011 data to the average values reported in Cottonwood Seep from 1977 - 1982 shows that all detected analytes are below the historic average except chloride, sulfate, pH and total dissolved solids ("TDS"). The differences are not significant and are most likely due to the normal fluctuations due to flow rates or seasonal variations due to annual precipitation. Overall, the data reported for Cottonwood Seep are typical for a surface water sample with no indication of Mill influence. 5.1.3 Westwater Seep No VOCs were detected. Gross alpha, metals and major ions were the analytes detected. The metals detected were arsenic, beryllium, cadmium, copper, iron, lead, manganese, nickel, uranium, vanadium, and zinc. A comparison of the 2009 and 2010 data to the 2011 data shows that the concentrations of detected analytes remained approximately the same or decreased (such as uranium) except for arsenic, beryllium, cadmium, calcium, copper, iron, lead, manganese, nickel, vanadium, and zinc. The concentrations of iron and manganese did increase, but they are below the upper range of historic values for the on-site monitoring wells. Calcium increased but is a naturally occurring cation, present in many soils, and the increase is likely present due to leaching from the surrounding soils. Positive detections of arsenic, beryllium, cadmium, copper, lead, nickel, vanadium, and zinc have not been reported in 2009 or 2010. These detections are also most likely present due to leaching from the surrounding soils and the soils the water contacted during the sampling while waiting for the excavation to fill. It is important to note that the method blank associated with these samples reported both nickel and zinc at low levels. The method blank contamination was less than an order of magnitude below the sample results; however, it is an indication that there may have been analytical issues which affected the sample results reported for Westwater Seep. The positive detections are not significant and are most likely due to natural leaching, analytical laboratory errors or the differences in the time of year sampled or normal fluctuations due to flow rates and seasonal variations due to annual precipitation. Overall, the data reported for Westwater Seep are typical for a surface water sample with no indication of Mill influence. 11 N:\Required Reports\Seeps and Springs Sampling Report\20l 1\201 I Annual Report -text.docx 5.1.4 Entrance Spring No VOCs were detected. Gross alpha, metals and major ions were the only analytes detected. The metals detections were minimal with only iron, manganese, selenium and uranium having positive detections. A comparison of the 2009 and 2010 data to the 2011 data shows that the concentrations of most detected analytes remained approximately the same (for example uranium) with only minor changes within the limits of normal analytical deviation. The reported values for calcium, chloride, potassium, sodium, pH, iron, and manganese increased from the 2009 and 2010 sample results. Carbonate was reported for the first time in the Entrance Spring sample from July 2011. The carbonate is likely due to soil influences and leaching of the surrounding soils and is not indicative of Mill influence. Gross alpha was reported in both the May and July samples and ammonia was reported in the July sample. Gross alpha and ammonia were detected previously in 2009, but were nondetect in 2010. The detected concentrations are significantly below the upper range of historic values for the on-site monitoring wells. Overall, the data reported for Entrance Spring are typical for a sUlface water sample with no indication of Mill influence. 6.0 CORRECTIVE ACTION REPORT No corrective action reports are required for the 2011 annual sampling event. 6.1 Assessment of Corrective Actions from Previous Period Below is a discussion of the corrective actions specified in the 2010 Annual Seeps and Springs Monitoring Report. • Sampling procedures described in the Sampling Plan do not reflect all potential site conditions (sampling when a ladle is not needed due to adequate volumes) and need to include additional sampling strategies (collection of samples using a peristaltic pump) to meet differing site conditions. • THF samples were inadvertently omitted from the original sample suites collected in July 2010. The problems have been investigated by the QA Manager and the verification of the corrective actions completed. The Sampling Plan has been revised to accurately reflect the sampling procedures, and to address the inaccuracies noted in the previous report (semivolatiles are no longer required, receipt temperature disagreement, etc.). The Draft Sampling Plan, Revision 1, includes a revised field form which lists all of the analytes which need to be collected to address the inadvertent omission of THF from the 2010 sampling event. All of the corrective actions have been completed and no further corrective actions are required. 7.0 ELECTRONIC DATA FILES AND FORMAT Denison has provided to the Executive Secretary electronic copies of all laboratory results from groundwater quality monitoring conducted during the quarter in Comma Separated Values 12 N:\Required Reports\Seeps and Springs Sampling Report\2011\2011 Annual Report -text.docx ("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 F. 13 N:\Required Reports\Seeps and Springs Sampling Report\2011\2011 Annual Report -text.docx 8.0 SIGNATURE AND CERTIFICATION This document was prepared by Denison Mines (USA) Corp. on November 23,2011. By: Davi Vice Presid nt, Regulatory Affairs and Counsel Certification I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and co plete. am aware that there are significant penalties for submitting false information, inc1udi the ossibility of fine and imprisonment for knowing violations. Da . C. F ydenlund Vice resi ent, Regulatory Affairs and Counsel Denison Mines (USA) Corp. 14 N:\Required Reports\Seeps and Springs Sampling Report\2011\2011 Annual Report -text.docx Tables Table 1: Summary of Seeps and Springs Sampling for 2011 - . Work Order No.lLab Date of Lab Sample Collection Location Sample Date SetID Report Method May 2011 EL = CII060151 EL = 7111111 Collected using a Entrance Spring 5/3112011 AWAL = 1106074 A W AL = 6/8111 peristaltic pump. EL = CI1060151 EL = 7111111 Collected using a Cottonwood Seep 5/311201 1 AWAL= 1106074 A W AL = 6/8111 peristaltic pump. Collected directly from the spring out-flow, except for filtered analytes which were Back Spring (Duplicate EL = C11060151 EL=7111111 collected with a of Ruin Spring) 5/3112011 AWAL= 1106074 AWAL = 6/8111 peristaltic pump. Collected directly from the spring out-flow, except for filtered analytes which were EL = C11060151 EL=7111111 collected with a Ruin Spring 5/3112011 AWAL= 1106074 AWAL = 6/8111 peristaltic pump. Collected by dipping containers into the excavation except for filtered analytes which EL = C11060151 EL = 7111111 were collected with a Westwater Seep 5/3112011 AWAL= 1106074 A W AL = 6/8111 peristaltic pump. July 2011 EL = CI1070577 EL = 8/2111 A W AL Collected using a Entrance Spring 7113/2011 AWAL= 1107303 =7122111 peristaltic pump. EL = C11070577 EL = 8/2111 AWAL Collected using a Cottonwood Seep 7113/2011 AWAL= 1107303 = 7/22111 peristaltic pump. Collected directly from the spring out-flow, except for filtered analytes which were Back Spring (Duplicate EL = C11070577 EL = 8/2111 AWAL collected with a of Ruin Spring) 711312011 AWAL = 1107303 =7122111 peristaltic pump. Collected directly from the spring out-flow, except for filtered analytes which were EL = CII070577 EL = 8/2111 A W AL collected with a Ruin Spring 7113/2011 AWAL = 1107303 = 7122111 peristaltic pump. Westwater Seep Not Sampled -Dr Not Sampled -Dry Not Sampled -Dry Not Sampled -Dry Corral Canyon Seep and Corral Springs were dry during both the May 2011 and July 2011 sampling events. Repeat visits did not indicate that development attemps would be successful. Table 2A Detected Constituents and Comparison to Historic Values and Mill Site Monitoring Wells I;" ,r~~"i,:S(llf" :.I,,~\' 3,f,,,,,'il':;,~ ,/fl' ff .. < ,'~ •• ,.( •• j ,F). • ~ '. fl I \'~>;,i+'" ii.' (tl' ':" l'i''',ifRui~ Spring '( 'i1;t ,,!'" "; .. 'i,," •. ': ;''ll; ""'::,'.¥;; ·:-'~i;;~.)ii;. "'~~f>,i·:V.~· I": ::'"':''' ,,·'''.;tl:i~ .i':"'.' "'!'. I~, ,':;1\1 .i, ~;~~~". :(' .. ;' ,f' "';J;I~~ .• , Ii' i i"::' ':~.'I~j~r~;.}~l\ I~:/:. "' ,I . I~. ~L. '\ ,) "", ,; " :l' ',.,,).;," , '. , Rahge of A vera~e !~, I",' . , ~ ~ > \ I' ~ ti~j: 11~:,j f ' r," , ~ J' , , '. ;),. l. .; f 1'0~~r "', ,)J, _~ • ' ! ,.&)~ , . . fll! ' , : '. '" '" ;l;" '1 }l . ."! ':: ') o! ~ I:~';'~W 2~io;,:(rf :r,~HistOr.ic Values for, li\'f1k " "" ":d ,;.' v.:lI> ),u;, .~" ::;~Ma~2,01li: :!': ': 'Jt1I~ 2011'.!1 f.,;. " ! ',>. .' ," " 1, 2 ,1 l' ,tit,toristittieht" ' ,:}r~ , 1" l' 2009 r'\~ -,', 'I' ( "Monitbring Wells',~ >1:,:/ Ir,'A,ve 2003·200"~'1 "':'i'i~, . I', ' 7''':~', " ':d·, ' .,,' ,I" 't'. • r"}' '!.~. ""., ~": t.' , ,~~, '1 :~'~"~'I ;:~/' '.' .. 'iIi ~; ,,: ,. " i, f' \1VIajor IC!nsJ~g/l) . b J, , I ,) ", " .. f I ' . , ~. i!i ' '£", .'" .. Carbonate <I <I <I I II, --1~ . ' I ;1\, . ,r , . ;; , ~, - Bicarbonate 233 254 241 239 '!; •. --·yl. Ql" I:' Jill" .--'il "',.: .. .. H ,.,;.',ii: Calcium lSI 136 145 148 . ~'i':i~i"H'-";lA\;).) ~~. I, , ~(·I!·I!' f, ;: >~\~: . 11:~~~\;~h, ,\i :~1 Chloride 28 23 25 44 '." " ND'-213 Ii· . 1"1'''' 27 " .,i!:'I; Fluoride 0.5 0.53 0.45 0.5 ' '\. ND -1.3 ' l!~, 0.6 . :!!. Magnesium 32.3 29.7 30.6 31.1 ir> --i,'.' "'" 1;",,'.\, --, .... Nitrogen-Ammonia 0.09 <0.05 ND <0.05 .,:"::-, .' . iT t~? . ~ 1;','\',;:' fr.:,~.~~.~,;!;;; /' .. Nitrogen-Nitrate 1.4 1.7 1.7 1.6 "J.: --" --... . I", , . Potassium 3.3 3.07 3.3 --, --3.2 h Sodium 104 93.4 110 III " .,,--" --..... Sulfate 528 447 486 484 !' ;,:.\ND -3455 . 'I·L Iii"'" 521 ;<{ j. pH (s.u.) 7.85 7.51 7.66 8.14 F'~~~\ q·7.1~8(~ ,'~':I'! J li',;::'11i~i ,'7.9' ',''1:;;,'; TOS 1010 903 942 905 ,1019-5548 ,', .. r< 1053 ·U, i.l' 'i'~ .,~ '. " Ie' .. r!', ',1) I"'t~"" " ',.",;,.:,,.'. , Metals (tigtl) " if.i' . " '" . -'.". ,\ Arsenic <5 <5 <5 <5 I,,'" .. ",~:~;;-"", ' 'i{ li;'.~/,; --.,;' '.J Beryllium <0.5 <0.5 <0.5 <0.5 I;'··',,;.t~(\;j ""k-" .. ':,"',7.(: I)~;' ·'il./ -'=~i ";\i~~~I' ,1, .j", Cadmium <0.5 <0.5 <0.5 <0.5 It. '{NID' -4.78 P<\ I"t' ri, om . , Chromium <25 <25 <25 <25 I'" ,,: I. I~>'l<'!;' --\» .. ~\,: • >-,', Cobalt <10 <10 <10 <10 '''·\If)~':·'.' --q' ,:,~:."jJ>" . .i,~ " '--'i ~!;";'~r ;" "." . Copper <10 <10 <10 <10 ! ' .. ".' H'~~.i r'~_ "', '. i'I,' Ii?" ,,--:.'j ":r' !Ii'. Iron <30 <30 <30 <30 -"-'. i~'NJ) -'794.2 "., W 'rr" 25 ... " '2 .,' Lead <1.0 <1.0 <1.0 <1.0 x if --." -- Manganese <10 <10 <10 <10 ,. ND -34:550 ,.', 5 ,;. >. Mercury <0.5 <0.5 <0.5 <0.5 1+: --, I --,'. , >to Molybdenum 17 17 16 17 ~ . : 0' , '-C;;' ";", , j" --: •. ' 1/;. Nickel <20 <20 <20 <20 ND -61 ;', 0.05 Selenium 12.2 10 11.8 10.2 ND -106.5 12.1 Silver <10 <10 <10 <10 I,,'i --" '! --, .. " Thallium <0.5 <0.5 <0.5 <0.5 I ',," "~-., :"""" '. Iy", , . i), --'~ -"-Tin <100 <100 <100 <100 I ---"-''I') --.. c Uranium 9.11 8.47 9.35 8.63 ND -59.8, ,1 il' 10 Vanadium <15 <IS <15 <15 --J -- Zinc <10 <10 <10 <10 . ---- . ," ,,' " ., , , ',.'." , . '. ' .. Radiqlogics .(pCiIl) r Gross Alpha <0.2 <0.2 <-0.3 <-0.05 ND-36 1:.'" 0.28 " ", I .. ,ii, VOCS (ugIL) . " 1 I. , Acetone <20 <20 ND ND ',1; ::",' ,1~--, ":,; I~'." ""'r' --ii' "'" Benzene <1.0 <1.0 NO ND .' ----..'c Carbon tetrachloride <1.0 <1.0 ND NO ---- Chloroform <1.0 <1.0 ND NO '.i~ --'~-,. Chloromethane <1.0 <1.0 ND ND '4 ~ --., .. , I~ , .... ' ',C-'. ", ,.:' . " Methylene Chloride <1.0 <1.0 NO NO Naphthalene <1.0 <1.0 NO NO Tetrahydrofuran <1.0 <1.0 NO NO Toluene <1.0 <1.0 NO NO Xylenes <1.0 <1.0 NO ND 1 From Figure 3, Table 10 and Appendix B of the Revised Addendum, Background Groundwater Quality Report: New Wells for Denison Mines (USA) Corp's White Mesa Mill Site, San Juan County, Utah, April 30, 2008, prepared by INTERA, Inc. and Table 16 and Appendix D of the Revised Background Groundwater Quality Report: Existing Wells for Denison Mines (USA) Corp. 's White Mesa Uranium Mill Site, San Juan County, Utah, October 2007, prepared by INTERA, Inc. 2 From Figure 9 of the Revised Addendum, Evaluation of Available Pre-Operational and Regional Background Data, Background Groundwater Quality Report: Existing Wells for Denison Mines (USA) Corp. 's White Mesa Mill Site, San Juan Couinty, Utah , November 16,2007, prepared by INTERA, Inc. *Range of average historic values for On-Site Monitoring Wells as reported on April 30, 2008 (MW-l, MW-2, MW-3, MW- 3A, MW-4, MW-5, MW-ll, MW-12, MW-14, MW-15, MW-17, MW-18, MW-19, MW-20, MW-22, MW-23, MW-24, MW-25, MW-26, MW-27, MW-28, MW-29, MW-30, MW-31 and MW-32)2 Table 2B Detected Constituents and Comparison to Historic Values and Mill Site Monitoring Wells .(I{?i~;· ~~p .·~~,.!(~;;,'Wii~~1/~?~:r·l;/\'· vll( ii'.'~":Nt!~i. i";;"iiJ\~~:;;~otto~wood,S~ep'\(!I~.,.,· •. ,:1 ""i':);:;!', ,i/:, ':;\: ,,: ' : '~f,:i,'~/'?! J; f'(j!;R~¥~ij;:i:r S7:(:1i1~'" '''''~'IWtj,!fi;, " ;;~":r~?f ", 'c'rH' ,f' ~:~~{ "I:~;~~t~'~,\l '; /: .' 'N. ,"', ~,: " ':" i·;'~"~""d~h;f'" , Il!t./ Range QfAvera~€;; '; ' .. : .... , ',.~:I';!', ", ':."'.>",,' .; ('j I " .' L " '"., . . ll~'f.l I:\u"~ (). 1ft ,I.... I " < ' .;, .' .-'" Historic Values for ' , , May,2011 . ,i . ; july ,2()11 :, \ • .' \ . "1·,' A ve ~9717,'. 1982 J. I"~ moh~tituent,121 ,,~~\,.' ,200~ '~1f,:" .il" 2019i i,"1~r,; " . I .r Momtormg :Wells '" " ,.,' ,,'il ':!fl.;··,\ ';':.: .. ;i"fl~". ,W'.!:l: , ,'Major Ions (mgll) ,. '), ' ~i! . '. . ",Ji . , ,. ,il? . , , il , Carbonate <1 <1 <1 6 V ~.. "', --.W!,.: 'i:, ,~-G i2ki'J, Bicarbonate 316 340 330 316 "«~~j.,!,\,'K~>~~ )11: ,,~l '·:lhh~~~~;,. !~~!U Calcium 903 92,2 95,4 94.2 " --, --i'li/' '0" I Chloride 124 112 113 134 .... ~ ., NO -213,}' '''iff, 31 ' . Fluoride 0,4 038 0.34 038 t.. 'NIJ> -"1.3 , " ,l,""'" '0:8':"" " . " ",;; Magnesium 25 24,8 25.2 25.2 " '" I;' .! -- <' '", \ Nitrogen-Ammonia <0.05 <0.05 <0,05 <0.05 ,r' " --~sr' I~:'l";{ '{ --"t. n" Nitrogen-Nitrate 0.1 <0.1 0.1 <0.1 I ~<;',:" "'.' ~1.;> :I} . I ~ , .1 ), ,--'Y"' ''''. Potassium 5.7 5.77 6 5.9 :t'"' ',.-~ :1,':', I!l '" ,-c,j;"",:;! Sodium 205 214 229 227 ---" :/!', Sulfate 383 389 394 389 I Nt;) -3455 , .~ 1'1 230 ' ':} I '. ~ pH (s.u.) 7.73 7,47 7.55 8.04 6.7 -8.9 , 7.6 .,' TOS 1010 900 1030 978 Hn9 05548 . 'I' 811 " 'iI, ttii.:\jj:""i,. ;;',1:\,., I'.;; il;; ... , "1' i<,:,. '~i' '. Metll~~ (ugll) ::;1;: :';" , ,-,; .'" ,.<.'1-. ~, , .. 'II ',m, :'1 <,; 'j.'''' I 'i. , '. Arsenic <5 <5 <5 <5 --" , i,l, __ ",;t '" 'OJ Beryllium <0.5 <0.5 <0.5 <0.5 " --~-t,· ";' --, ,1:. Cadmium <0.5 <0.5 <0.5 <0.5 ,:::. NO' ~!,78 11,1", '!.1j·:':,·j~".,>,--,,,;,\,· :")",,; ,- Chromium <25 <25 <25 <25 " ""', 'kic' -~, " "," :Ii Cobalt <10 <10 <10 <10 --," ~:, ii Copper <10 <10 <10 <10 < '~'I'~~: t ; ):i i'~" ~\. . "-i'!~~'''',' Iron <30 <30 53 <30 ~: .i'~ND~-79421 :l ·~i'.~ , >1'50 ". Lead <1.0 <1.0 <1.0 <1.0 --if --". Manganese <10 <10 <10 <10 NO -3~,550, ... " . -'''I' 580 .. Mercury <0.5 <0,5 <0.5 <0.5 --'. ' --, Molybdenum <10 <10 <10 <10 --,",' ':'-i" " Nickel <20 <20 <20 <20 NO.61 , ,,--,:4',' Selenium <5.0 <5.0 <5.0 <5.0 Ii'l" ND -106.5 Silver <10 <10 <10 <10 --" -- Thallium <0.5 <0.5 <0.5 <0,5 f(I' ,':' '-, .\ ',\ :"' ' "--, ." Tin <100 <100 <100 <100 ----.' Uranium 8.42 8.24 7.87 8.68 NO -59.8 I '. -- Vanadium <15 <15 <15 <15 :1' --I' ,~, ,; Zinc <10 <10 <10 <10 .f; --, ., ,II --' ". .< .,' , Radiologies (pCill) Gross Alpha <0.2 <0.2 <0.1 <-0.1 i ND -36 7.2 VOCS (ugIL) Acetone <20 <20 ND ND ---- Benzene <1.0 <1.0 ND ND --." . , , !i __ , ." Carbon tetrachloride <1.0 <1.0 ND ND --, ", --'" Chloroform <1.0 <1.0 ND NO I' \.----', '''. Chloromethane <1.0 <1.0 ND ND ---- MEK <20 <20 ND ND --I -- Methylene Chloride <1.0 <1.0 ND ND __ rl -- Naphthalene <1.0 <1.0 ND ND e. ----," " .' 1> '" 'j Table 2B Detected Constituents and Comparison to Historic Values and Mill Site Monitoring Wells Toluene <1.0 <1.0 NO NO Xylenes <1.0 <1.0 NO NO I From Figure 3, Table 10 and Appendix B of the Revised Addendum, Background Groundwater Quality Report: New Wells for Denison Mines (USA) Corp's White Mesa Mill Site, San Juan County, Utah, April 30, 2008, prepared by INTERA, Inc. and Table 16 and Appendix D of the Revised Background Groundwater Quality Report: Existing Wells for Denison Mines (USA) Corp. 's White Mesa Uranium Mill Site, San Juan County, Utah, October 2007, prepared by INTERA, Inc. *Range of average historic values for On-Site Monitoring Wells as reported on April 30, 2008 (MW-l, MW-2, MW-3, MW- 3A, MW-4, MW-5, MW-l1, MW-12, MW-14, MW-15, MW-17, MW-18, MW-19, MW-20, MW-22, MW-23, MW-24, MW- 25, MW-26, MW-27, MW-28, MW-29, MW-30, MW-31 and MW-32) Table 2C Detected Constituents and Comparison to Historic Values and Mill Site Monitoring Wells h'" o,~ • ~ ,'0, "'; , 'W' t t S ' " •. ~"t"W""'l'nj;)"'"'''''' '~', ' ":"" ,~" "",,, .. ~ W"" "p. '.'·n, , " ' ,,,, '" " 1!,')~;"''j1l"'' l 'f';~S~~)" II'!';;' , .:" I!'. :.,{:~~) Ir'~ ~;¥'~' ""'1 'N~"I'0:;; .' .' .. 1 t, Iq;·· ,'! I, " .i'· •. . .1 . 1''' 'I' ,,",. Qj!' "1'.,, ". ~ ~r~~?i; I~! "'h"'" ":, I," ',. " 1\».g. o' A ""g, ,!;strl,k , "' II . . it, ", ')' ' ,,)i Ittv l '~' M "., ",. ,. ( ',' "',!'".,,',, ,". \ ' '. a ues or omtormg ' r, f I It ( ~\I~ .,\ ~ t 'j'1 . j-Il;l~: j. • I"! ,. ( )1, Ir I t I ." I ; I I ,l I" II', ':'J1:' , (1:1 onstitJent '(~ '. ,,';,,,2009,;" i':"\ ,.,12010 1 '), ,;r;,. Ma~ 20H ,ij,·lii}.,'i~July'2011 '.<; I,,; ,,;i, :J:: .IWells\'*" ,., "J., I I'" ,/-• It ,,; , " .r, ",; ,I' ., il ":~:Ai ,/ ..• ' .~" ,'\ " ,\i' t" " '.' .,." '::Ki):-:; li~' iI. X:'i Ib, :~ " I'." .j' "~., I ";.,;, " , "', 1/ ·'·S .• I ij Major Ions (mgll) "~I ,'\1; ',." i,.' ,'. iV' .' .1.f">, .. ,;~!, ,"'I, /j' '. ,(~". '},' II "i}" ':'",Au'l Carbonate <1 <1 <1 :·r,.I,",!." ·:H~'.·~j.~::1 ·\Il,h{~~~~,t:': Bicarbonate 465 450 371 1\::11 ~r '.t\~1~j,t":'-"t;'. i;M!~'J~/ Calcium 191 179 247 ;. '~ i~ ,-.)i"·, .. ,·~",.'! Chloride 41 40 21 .. :\. .... ,.;,,! 'ND,-·213 /i"l~,::., Fluoride 0.7 0.6 0.54 f," r;" NJ:)-1.3;; :1>"" Magnesium 45,9 44.7 34,7 Not Sampled -1'< :t" " "!:~'. --'.1 " ";"r.'\~ I: Nitrogen·Ammonia <0.05 0,5 0,06 Dry » ,I: J?'''' :-.~l'.·ii . ,;t :'}~" Nitrogen·Nitrate 0.8 <0.1 <0.1 ~~."i;JI -:. '~, ,;~,~ . .tV" .4{i:r: Potassium 1.19 6.57 3,9 ' ,y~:,j;o ,1',,, )./, CC)::' Ir '. gil' Sodium 196 160 112 i' . ,,;t._-, .! Sulfate 646 607 354 ", .. NO -,3455 Ii' :,~", , pH (s.u.) 8.01 7.38 7.2 "; ~, 6,7 ~ 8:9 ".!, TDS 1370 1270 853 1':,,-1(:)19 -5548 J,'-a j ,,:!)'" {!~; , .~ ,t,. ;(:~i .. ' , ' nl .:.. , ,,""Ji; " ;. ', ... .I, , ·:r,~:, '~~i;it"'I\ . ':!:" . "'1" I, :1t~~Ir.~'Y~'[';~~'~,:J,i~L) i: f':11" i'e" .,', '.' t' .,0;:' ,;~'.; ~'I&"'( ," M~talsl (ugtI) ",P' ,I." IJ/!!: ,t ~ Arsenic <5 <5 12.3 " " i,l --, ~. 'a ,~, .. '( ... ,; , Beryllium <0,5 <0,5 0.91 I'" ',\ .;;:::;;"'",;,'--. '.\, . ';,'i~ Cadmium <0,5 <0,5 0.9 llL ;;I")Y'NDl ~"4, 'W8;:hii;y,I;;,;J: Chromium <25 <25 <25 "" , --" ,i, Cobalt <10 <10 <10 !~. ';::lil ')~ --;~ "!~, ,;' , '.' .. l,u, ~ Copper <10 <10 16 !r?~I"'t;~I~ :";,I( . IV ' 1 'lt~;;;: '" '. . ...:, .~~ , .. ' Iron 89 56 4540 -[ '"ND'~"7942 ,,,,,, -"L, Lead <1.0 <1.0 41,4 ~;;:~';" t, 'Ii ;'ll~"c-". "~, 1 ', .• ' . ': Manganese 37 87 268 l:k,', NI( : 34;550 ~~l'~ , Mercury <0.5 <0.5 <0.5 Not Sampled -/J') --"~~;.:,/ Molybdenum 29 29 Dry "" .. :';, ~: :? ,,' <10 "" Nickel <20 <20 29 ':'F~Z . NO 361 . :"',: Selenium <5.0 <5.0 <5.0 NO -106.5 " Silver <10 <10 <10 '. " -- Thallium <0,5 <0.5 <0.5 . ;/ -:. Tin <100 <100 <100 . :., ! !, " ~ . -- Uranium 15,1 46.6 6,64 .. NO -59,.8 i'J. I,' Vanadium <15 <15 34 I', ",' C;-." ., Zinc <10 <10 28 ,-'{"'"," ., " 1 Ii ,'" i·'~j" .. " , ,,. ', .. "{l ',. Radiologies (pCiIl)' (" , ,lf~' I '" '. , Gross Alpha I < -0.1 <0.3 I 0.5 J'lot Sampled -Dd ND-36 ,L I , ", " :'. VOCS (ugIL) , I " Acetone <20 <20 NO -~ Benzene <1.0 <1.0 NO -- Carbon tetrachloride <1.0 <1.0 NO 'il , --.'" Chloroform <1 .0 <1.0 NO -- Chloromethane <1 .0 <1.0 NO . --' . MEK <20 <20 NO Not Sampled -,. Dry ;;- Methylene Chloride <1.0 <1.0 NO " . '" ': ," -,-',~ Table 2C Detected Constituents and Comparison to Historic Values and Mill Site Monitoring Wells Tetrahydrofuran <1.0 <1.0 ND Toluene <1.0 <1.0 ND Xylenes <1.0 <1.0 ND I From Figure 3, Table 10 and Appendix B of the Revised Addendum, Background Groundwater Quality Report: New Wells for Denison Mines (USA) Corp's White Mesa Mill Site, San Juan County, Utah, April 30, 200S, prepared by INTERA, Inc. and Table 16 and Appendix D of the Revised Background Groundwater Quality Report: Existing Wells for Denison Mines (USA) Corp. 's White Mesa Uranium Mill Site, San Juan County, Utah, October 2007, prepared by INTERA, Inc. *Range of average historic values for On-Site Monitoring Wells as reported on April 30, 200S (MW-l, MW-2, MW-3, MW-3A, MW- 4, MW-S, MW-ll, MW-12, MW-14, MW-lS, MW-17, MW-lS, MW-19, MW-20, MW-22, MW-23, MW-24, MW-2S, MW-26, MW-27, MW-2S, MW-29, MW-30, MW-31 and MW-32) Table 20 Detected Constituents and Compari son to Historic Values and Mill Site Monitoring Wells /;f,.~" i .• ~ .'..:' ""'.:,'.;.' :';" i.,::, ,.(C\.ii· J: :, \\:E htrance'Spring !.,'f;r' ikp "i !, \. ,i" , ,J ,iviki;~I; Cd:I\'ilp/" .. .,' ., 1";~J~~r ~ !".. ~f~~~! ii'· .. ,J " .' :.~ ';' r:~;t;;:/~;:E;'! l~l;>!"~',j: '\';;A~;; ',. ':i,r. .;,.' }. .:' , ., :;~~'\: 1'~7S ~' ·f:' • I!', ' .. '.' .,';, 11,(' , . '. .', \1 " ~ ·r!···.·, .. ' ',J i"'. ' .' ,,', . "~" Range of A,v!!rage II": " '. '. , "'j (\.';," " >' , , ';;f~; 's";l~, !;:'" 't;_' I,i :I:! I ;':' 11 I !;Iis!o~ic y a\~erf~~: '. .'.' }.. I. :1 " . :ftt: ii .. " dtri~,' ~' ~ ,\ 'J ';.: -/ .!;<~; !:;i.~~\':\'Constituent 'i' ,;";,: .. d'.~'\"2 'h" ... ~.; ,;' <Ii. iOlO: '3:<";;1 \si,~;May20~:1 Ii' i.ii I~ ,'July'20l,b " : 'Monitor.iiig Wells· * . I~,hl:'~~ , ,.n ;':.j~./ ,'.,. ::~Tiii'lh£ 'i~·'\:j:{ ~;i':" Z .jlJ;v" Major Iops'(mg/I):' iJ%'I!'" <di:,"1 ':, ... : ' h. ' 'i'" f 'i.,·:'!~:;/i:i''; , h), "j .i .' ,f<' I Carbonate <1 <I <I 7 l:r~,/'i\;~i.~;-~;" '!i:·~'.fj Bicarbonate 292 332 270 299 Ith··,~~'~;'li: ,.~ ,;,\' Mi, Calcium 90.8 96.5 88.8 96.6 ; " . ; -, . ,.~ t'. Chloride 60 63 49 64 , ND -213 , Fluoride 0.7 0.73 0.58 0.58 ··ND -1.3 ", ., Magnesium 26.6 28.9 26.4 28.4 ,i'. , ·f .. ,' , -~ r,f' Nitrogen-Ammonia 0.28 <0.05 <0.05 0.32 '\, ",.'ti,?:,!·!: '" ", .' n Ii". ',K; Nitrogen-Nitrate 1.4 I 1.4 0.5 il/' ,i,yi"'.'-'c t l' :""i' Potassium 2.4 2.74 2.6 2.9 :il~ '" :::.l"'c-,I ,,)I;/i, Sodium 61.4 62.7 62.5 68.6 I ' ,iii --"i'"" , Sulfate 178 179 166 171 :< ND -3455' pH (s.u.) 7.85 7.56 7.96 8.17 , ," 6.7 -8.9 . TDS 605 661 571 582 ,.1019 -5548 :i .' , , ,,<> Metals (ug/I).~ ,';", .' "J ,,', .. !, , { . '" ? '" " , Arsenic <5 <5 <5 <5 :f'it.x!~'·( te. --'. ,,: .. Beryllium <0.5 <0.5 <0.5 <0.5 ~,'i' " -" --. I~N ' Cadmium <0.5 <0.5 <0.5 <0.5 ~!;'~."ND ..•• ~38 11l'W ,r: Chromium <25 <25 <25 <25 . i~",' I. '\,' ";. j Cobalt <10 <10 <10 <1 0 ,"" ,Ii<, --, , 'fi"r, Copper <10 <10 <10 <10 __ Iii . i! Iron <30 <30 37 55 ,ND -7942 Lead <1.0 <1.0 <1.0 <1.0 ,',' .' -- Manganese 54 11 47 84 NO -34,550 Mercury <0.5 <0.5 <0.5 <0.5 '. " -- Molybdenum <10 <10 <10 <10 I.", : ' "~i' --. , ;;: Nickel <20 <20 <20 <20 ',,;'!),;;. ND -611" :,y. Selenium 12.1 9.2 13.1 5.5 .. ND -'106.5 Silver <10 <10 <10 <10 ;,' ~:!' !J Thallium <0.5 <0.5 <0.5 <0.5 ' , .. , -- Tin <100 <100 <100 <100 -- Uranium 15.2 17.8 18.8 15.3 'J" ND -59.8 Vanadium <15 <15 <15 <15 -- Zinc <10 <10 <10 <10 Ii· --'.i. '0' ' ./ ., " Radiol~~ics (pCi/I), ,"', . , , Gross Alpha 0.9 <0.5 1.5 1.6 h' ND -36 " .'" V· " i " , .. "i VOCS (ugIL) " IH: -/';' ., ',I' i' '" Acetone <20 <20 ND ND ~, -~:, . Benzene <1.0 <1.0 ND ND -- Carbon tetrachloride <1.0 <1.0 ND ND '. ~;; .... Chloroform <1.0 <1.0 ND ND 'I' -- Chloromethane <1.0 <1.0 ND ND '-- MEK <20 <20 ND ND 'j -- Methylene Chloride <1.0 <1.0 ND ND i -- Table 2D Detected Constituents and Comparison to Historic Values and Mill Site Monitoring Wells Tetrahydrofuran <1.0 <1.0 ND NO Toluene <1.0 <1.0 ND ND Xylenes <1.0 <1.0 ND ND 1 From Figure 3, Table 10 and Appendix B of the Revised Addendum, Background Groundwater Quality Report: New Wells for Denison Mines (USA) Corp's White Mesa Mill Site, San Juan County, Utah, April 30, 2008, prepared by INTERA, Inc. and Table 16 and Appendix D of the Revised Background Groundwater Quality Report: Existing Wells for Denison Mines (USA) Corp. 's White Mesa Uranium Mill Site, San Juan County, Utah, October 2007, prepared by INTERA, Inc. *Range of average historic values for On-Site Monitoring Wells as reported on April 30, 2008 (MW-l, MW-2, MW-3, MW-3 MW-5, MW-ll, MW-12, MW-14, MW-15, MW-17, MW-18, MW-19, MW-20, MW-22, MW-23, MW-24, MW-25, MW-26. MW-28, MW-29, MW-30, MW-31 and MW-32) INDEX OF TABS Tab A Seeps and Springs Field Data Sheets and Photographic Documentation -2011 Tab B Field Parameter Measurement Data Tab C Survey Data and Contour Map Tab D Analytical Laboratory Data Tab E Quality Assurance and Data Validation Tables E-l Holding Time Evaluation E-2 Laboratory Receipt Temperature Check E-3 Anal ytical Method Check E-4 Reporting Limit Evaluation E-5 Trip Blank Evaluation E-6 QAlQC Evaluation for Sample Duplicates E-7 Radiologics Counting Error E-8 Laboratory Matrix QC Evaluation Tab F CSV Transmittal Tab G DRC Correspondence Regarding Annual Seeps and Springs Reports and Data Use Tab A Seeps and Springs Field Data Sheets and Photographic Documentation -2011 o C) Attachment A Field Data Record~Seeps lind Springs Sampling; Time and Date of Sample Bv. nt: Seep or Spring Location: .J...9yfLl::,~W-------------- Sampling Personnel: ~!.RlbJ......p.t;.f.!LJ1 l£X'-r---:---~----, ___ _ Weather Conditions at tim6 f Sampling: 'e: 'r ,~ __ _ Sampling Equipment Utilized: ,/!!a5'{((.lkx g -I'V::rf}/2~-:rr,~ q k t;,S/1~~~1G Sampling Method Utilized: _,t:::;b{£L/J.'.I3f1:L:.Ii»--___ -:;--'":"""7I-:-_______ _ Estimated Seep of Spring Flow Rate: If /-""Z? ;Jtil---------- Parameters to be Analyzed at the Laboratory: ._7fti1e. 2: ;!t>~t2::Ed hwrJf '1 t;;y~'/ ?fZd.S TilE *1 !hvi't(. I' f -"--,----------------------Field Parameter Measurements: .. pH 7&0'/ -Temperature --!h.£..[.:.=.S'7-:-0~:____--------- ~Coll.ductivity I LfDZ !lrivt of /S6? Sef r '/"-C/i r~4,,<c.?#J I gmrk v.4S ,t/'{c£j ($ Itl). dezuw( ~ fI{~5l/e,,<'0 ~~~ ~~ tJ F~ 7o~J /4wc In../t ~ t~~ ~ L ~w~~~_ t!iccif) 5 f ilks I klr S:.i a./-/tlZ.s; (/~(£ 4f:. fie r frTS p./t!'?e-fi.,·,l / /r"Uf k.5...-<."':"- Y"1#. 6rllkt. C) o A ttachment A Field Dgta RecordHSeeps lind Springs Sampling Time and Date of Sample Event: S / 3U 241) I f,S:O Seep o,r Spdng Location: ~~P"","=<:....I!*~l.L..IZU'-L.a ..... >_S~('!.I.-i;;DF-_________ _ Samphng Pers?~lnel: ,~~£ > r " __ _ Weather CondItIons at tune of Sampling: .Scc.c lfr;k d dad cLs t4r,4 ,I wi. ..~ __ _ Sampl~ng Equipment. ~tilized~w.j?~ 2!C1:U2tbk.'l( 1Yr~I#(71 .. !t£t$( dad SamplmgMethod Utlhzed: -.!:VL~ _.£:t~£ ~ _q~_" . Estimated Seep of Spring Flow Rate: L.. <! l () <':z tcl---------- Parameters to be Analyzed at the Laboratory: ::ii!"j{,1tj' ~({)"."' &"'J" t-1 : ..•. - Field Parameter M~asurements: ~pH IPQ: C. £7 wTemperature ~,_ t 5 . L3 wColl.ductivity I Z S' '1 . Aw\VG6 c;V ~ J..kftl> / ViS. /lv~"~ffl <1-"1"' 5~rM.(Je IN~ ~ / ys~ Sf12.-; ) 5r.-tf ;v(cdJ 10 k CkC'YI~) V<f~' kP'tN'~ j. ~/tn. IJ,64f;'" ~\ ~-t.,J.. {J.~ ~r~£?()""'"6 _ !;;p~ j f"VCU4.uk jA./U'C-'I-<./~ th..., .5«-"'l"'-~ ~/(u"kJ.. 111/ 5d~'i'br t,.JC;r-<-{?,.,//ec:M b, I"'~J, S~"'f14- Ika 1 Mc-'rW(~ ¢ brl>:i> AlIAJ.. t-J"0 A/jd (l./kckA br {-r/..vb --I ~ k/Jd/U a~~ '10 ~/L Ik.-w~ /NA.J -ta~s-kr' .. r( ~ t~t:It~ boll/(.. -ft 5c{vv--f/~ /::b 1fI"e.-,. 1YaJ1J k~ tJa.~ ~"'-<-?-J; It.. J11t:i.3 ~;(.-f!~ E...s fC4.!/(... Sc<", f' I~r tv i t G:SfoS .-til" . f; J,#v iF /) -t;: !'?J' 'f/...;. (,.k0 d««. 6ec~ ..... t£p0>.-Aw(v~ ~ 3~~ fo~ J ~j Avu~~( Y4, 7~ ];1 ~ baN /~/T /~ ~ 1rtA-C-/(" b,,/i t!k~f,~ 6"JI/e.-/> .3--v<,/IG bulk j)1f. ~f,«.7 litd.> / &w" 5, -# ~ "-tVC>'<oO ,i.e, 'Fr~ [""/3 6",;#4-5 , Attachment A Field Dgta Record~Seeps And Spdngs Sam1ill.ng Time and Date of Sample Ev nt: "",c£:..,;..J=3.....,1{-L/ z ...... %2;..J..i.j.....1 _-f/~/Y~S-~ ___ ~_ Seep or Spring Location: '",.> Itt -J ~~~~~~--------------------------Sampling Personnel: t ~ Weather Conditions at tim--'e -0 i"'-, S~a-m.4pl~hLDlg=: ~-""'Z:'-I--""'--. ----._-- Sampling Equipment Utilized: " tJ!4&vf'4Y @ #0Z;r1rJiv ~mI.;rl; .1'5"' /I1,t~-ifii4 Sampling Method Utilized: [-tIM >aNiJIL ;r I ) f1 Estimated Seep of Spring Flow Rate: /~ I. 2) 4 e-J4-c6 &-t ;1t.;,od, Parameters to. be Analyzed at the Labomtory: ff I _~ 7M/r;, t. ~ ImOf) 7h(UVfl.. fZi/Mtr it{,! 7l:j-p fAKtA~ AWe! ) (/ F-j-cld-Pam'-m-e-re-r-M-~-asu'-re-m-c-n-ts-:----------------------------------- .. pH 7 .. L('I -Temperature ~/r;:.)!-:-, ~%~5L....-__________ _ ~Con.ductivity --L.1=3:::;:3..::.<-__________ • __ _ /lrn~ tV'--.5~ k ~ II! b, 1;(17i1l't"ti ;;;Jw I , ~~-;t4 diVA' ~ //.3J O/ellJttJ t :t 1eIf~ @ 116{), ~.v"'1J 1.#7< 147 ~:fL,f'pJ,"'t -" f-V ~.7k &~_ o o Attachment A Field Dgta Record~Seeps llnd Springs Smnpling Time and Date of Sample Event; ~D:~Lia;.., .::..<!'-tI,-c:~o.!..IL-I __ .J./~JJ..-,~=-___ _ Seep or Spl'ing Location: ""?J=/{~SPf<:Li-":.::.;'-?--_' ______________ _ Sampling Personnel: q~a ~~:.:::f..~!!:~~ __ ___,;__;.___:r__ __ -___ --- Weather Conditions at time of Sampling: ~ _ t-vI4~11---.~ __ _ Sampling Equipment Utilized: MJ2'(ed~ cS P'~~ ~0/#/"lJ • 4(r;;;¢M,~t"'" Sampling Method Utilized: __ (;!;P _ r_ ~ _7 'V Estimated Seep of Spring Flow Rate: ______ ,~ _______ __,_- Parameters to be Analyzed at the Laboratory: .. _ TAble.. L 7f HNPP litE Field Parameter M~asuremonts: \' /J . ,. oC'~ jl:::.1A",--~ 12.,~ ,'r 'I /' ~ / "pH ____________ 7-'--~d=--_.,..,t:!-I .. --' "h~c;:.-r- wTemperature ______________ _ -Conductivity _______ , _______ _ , 1.", ~ i' ., ~ I -r,., \ "l / . o A ttachment A Field Dgta Record~See12s and Springs Sampling Field Parameter Measuremcnts= .. pH "78..I .Temperature ---J.1-!-1...<., ",,2~'t,-__________ _ ~Collductivity V,J, c: /lUI v ~ til" .s", k ~ 01.3' 1 < p~r'!<r-'vvk",s ,,*f'G {1 d~c>IcA ~( SkC."" Ie-~ fb-'II~ ()15() " _ cI~t.j "'/J '* /cIr $;k d-t IOID. ,'7 0 "'-(",,(vo-c-r f/de ...... ~ 't'\Ja-~ .. ,t: {),splJSA'l.r't.-rr-"((jt:--'-Vv~i ..f ' Lf.5 rvr<'(;.rtvrJ {1lk,z (.J~"C-dJ.c4. ~k(;W$ (.,0" ..... <.. 'It<-I4..... ,-Iv Skw... StM--.Pi.s I It. .f; -::.":>,..~~ (01;/( 01 ~v2... -(ftblt:,.. ~ f~t\~ /,N')\ hG s~.,..... 10 -t:Jv(crt iAhr THY 5tlj"l /.NI'/( k Stlilf -It; ~L .. () Attachment A ~ield Dgta Record~Se®s and Springs Sftmpling Time !lnd D~te ofSa~plc Event: G/31JUJ11 Seep o.r Spl'lng Location: ~laJ~t;, ~~ ~Jf--~ --- Samplmg Personnel: ~;; ,0--. Weath~r Cond,itions at ti~nef. Sampling: c,:;;=(~ 5 ; ~;; Sampling Equ1pment Uttlized: /I"ffJ -'-"{.Q:;l....~u......:fL/,~iLTI-------- Sa~pIing Method Utilized: -Ltl/rt Estimated Seep of Spring Flow~R-::ut;:-::-e-: '1\) -------------- Parameters to be Analyzed at the Laborail'ry: _hJbt ' F-i-cld-P~~·~m~e~te~r~M~e=M:u:=re=m=m~lt=s:~-------------------------------- ~pH /YJ4: -Temper~ture Afjl= -Conductivity -.1"""W---------------- /kf"'-ve {t /11f~ 4/l~fAtvW r'Yk~ IV~/tc~l~ 5~~ ~~~ h ~.J #L~t:V 67, ;kkJ (/kt '4~ j Ilidh'~ /-~~ ~I/ ~ !kIVA fl ju~, Attachment A Pield Dgta Record~Seeps and Springs Sam12ting Time and Date of Sample Event; S:..::....:;0:::::.:-.,·.l.<L.!;:JtJ1'-I<-1-+/ _________ . Seep o,r Spring Location: !fW5:-::::IQ. 7 Samphng Personnel: -t:'£~~I-!:6L~.r:.&1r:t_J.!C.'~~.~~ ........ .--______________ _ Weather Conditions at time of Sampling: c.le<jV .:s b '(,S . WA~~ uP , Sampling Equipment Utilized: Mil i I I Sampling Method Utilized: -P-I.p::Ir}t;....i_--=-______________ _ Estimated Seep of Spring Flo~ Rate: ..Jt>~r~ ___ _ Parameters to be Analyzed at the Laborat;?ry: -~~~~---------------------------------------------- -----~-:-:----------------------Field Parameter Measurements: ~pH IV/A- -Temperature --:;NoL-'l /.It~ ____________ _ ~Con.ductivity ..L/'J~/~.4 _____ _ L(~ ,i...<vA ik. Sut ~l -Fb1A.-...A -10. be.. b ~ . .fhok; NU(.. T41:t,... -h JJ(7lU~..v.f flo.<.. Sap k!cA.. AAJ~+~"'rvA-l-.4/kW\.fh (/J ill be. M~J~ tl. ~v"1.f4o. u<.",,-A ;4/1c-.."f- tv;/! be. C~lUr"f.t.,\Jc) tJin flw~s, J.'~) ~. t~ () Field Data Record-Seeps and Springs Sampling Seep or Spring Location: -1C~'M~.ru:J~-,,;~=-,,;~::;:,;U=tf:P"'---------------- Date For Initial Sampling Visit: ~/I'I!II Sample Collected: 0 Yes J.1 No Date For Second Sampling Visit: -:; 121 11/ r 7 ' Sample Collected: 0 Yes f(J No Date For Third Sampling Visit: 8/ ifl 20 I{ Time: 13ZrJ Time: 1(00 Time: !If ';0 Sample Collected: 0 Yes 0 No Sampling Personnel: ~~""""1~4>""Vl~+-A...aIk=I.<;.;;I"4""/T-....-_______________ _ Weather Conditions at Time of SampUng: _______________ _ Estimated Seep or Spring Flow Rate: ~J)='='=:J"-'-.::::.lr-------------- Field Parameter Measurements: -pH -Temperature (OC) ______________ _ -Conductivity f.lMHOC/cm ___________ _ -Turbidity (NTU) (if measured) __________ _ -Redox Potential Eh (mV) (if measured) ______ _ Analytical Parameters/Sample Collection Method: DYes oNo DYes ONo 0 0 0 0 DYes oNo DYes oNo 0 0 0 0 Nutrients DYes oNo DYes oNo 0 0 0 0 Other Non DYes o No DYes o No 0 0 0 0 DYes o No DYes oNo 0 0 0 0 QC Samples Associated with this Location: o Rinsate Blank o Duplicate Duplicate Sample Name: ~;N ~ £, yt;, ~t1 Notes: _ Y-1 ~ w....-c 11 o o Field Data Record~Seeps and Springs Sampling ~'-0Ov- Seep or Spring Location: _ .... ~"""{ ..... 2e"'*'J=1----'"s_S ...... ~=+()"--____________ _ I Date For Initial Sampling Visit: 7/1 'i / &ill ~ ~ , Time: 1"110 Sample Collected: 0 Yes ~ No Date For Second Sampling Visit: 'J/J../IJ./jll r } Time: 12 'i S' Sample Collected: 0 Yes t)I.l No Date For Third Sampling Visit: 0--1 ~ / 2a 1/ Time: of / tJ Sample Collected: 0 Yes ~ No Sampling Personnel: ~-'~.0~h~r-a~k=-______________ _ Weather Conditions at Time of Sampling: _______________ _ Estimated Seep or Spring Flow Rate: --='=D==::::=s:....:f2.~-------------- Field Parameter Measurements: -pH -Temperature (OC) ______________ _ -Conductivity ~MHOC/cm ___________ _ -Turbidity (NTU) (if measured) _________ _ -Redox Potential Eh (mV) (if measured) ______ _ Analytical Parameters/Sample Collection Method: VOCs DYes oNo DYes o No 0 0 0 0 THF DYes oNo DYes oNo 0 0 0 0 Nutrienls DYes o No DYes oNo 0 0 0 0 Other Non DYes o No DYes o No 0 0 0 0 Radiolo . Gross Alpha DYes o No DYes o No 0 0 0 0 QC Samples Associated with this Location: o Rinsate Blank o o Field Data Record-Seeps and Springs Sampling Seep or Spring Location: ~/oN41 y;yy/ ~~"-::3 Date For Initial Sampling Visit: 7/13/ ZOl! Time:_-r/"--,d,,,,--,==2.'""'t2~ ___ _ Sample Collected:)§ Yes 0 No Date For Second Sampling Visit: ________ Time: ________ _ Sample Collected: 0 Yes 0 No Date For Third Sampling Visit: ________ Time: _________ _ Sample Collected: 0 Yes 0 No Sampling Personnel: 12r"" a/1M o?#7 ~"" l/J'dkz,.L Weather Conditions at Time of Sampling: f2er t'adLy a ~/fy i Ifrr.,. Estimated Seep or Spring Flow Rate: -.J .. t..!. • ...J.L)-=-~ ...... I'_'.IL._(.{.L.)~6+.,t=_AL!.'M.:....I....--------- Field para!ter Measurements: -pH .b.: ~i -Temperature (oq _.J../''''''S~-."---f-1+-1-----:-~-:---------- -Conductivity I-lMHOC/cm -'---L.,Ib~->4L~--=------- -Turbidity (NTU) (if measured),_~';""IJ~. +..9------ -Redox Potential Eh (mV) (if measured) ----l'!¥---1Lj ....... J~ ___ _ Analytical Parameters/Sample Collection Method: oNo o o o o No 0 Yes 00 No o o o o No 0 Yes )EJ No o o o o No Yes 0 No o o o QC Samples Associated with this Location: o Rinsate Blank o Duplicate Duplicate Sample Name: __________ _ o o Field Data Record-Seeps and Springs Sampling Seep or Spring Location: --,£"""-,-I\---,kc...:..-=..:~"--,,-,,c.,-,,e.,""'------"'<-~..L.J;..e-'-<'-f1-f"-__________ _ Date For Initial Sampling Visit: "71}:5 /2.iJ11 r 1 Time :~----'-()'-I.X'",-,I,-",~",--___ _ Sample Collected: Ji(l Yes 0 No Date For Second Sampling Visit: ________ Time: ________ _ Sample Collected: 0 Yes 0 No -Date For Third Sampling Visit: ________ Time: _________ _ 'Sample Collected: 0 Yes 0 No Sampling Personnel: -I"""l-""',-,---,-=.4--'!.1 M..!..'-S<"....,.,,'-rl-_LL.JL..td.luO-...LIl.J!.lLJ..!=..!.~--'I-L=--::::::...:...!JC.!C· -"'-'¥ LA 1111+- Weather Conditions at Time of Sampling:--J-~<L.U:l::.ui{----'.-f'.'''l,L.!J-9-_______ _ Estimated Seep or Spring Flow Rate: --==_~""""'''-----I.+I-..!........l'--_______ ~ Field Parameter Measurements: -pH -c,. g£/ -Temperature (OC) _.....:{--'7_ ........ I/....t::.~'-:::-_--;--______ _ -Conductivity r.tMHOC/cm -1-1=$.='.2,-,-, ...... tz<---______ _ -Turbidity (NTU) (if measured)--'1'-=2:;..::{):o....;,:...1L...-_____ _ -Redox Potential Eh (mV) (if measured) ... 5'-"3"'-'0£.8' ____ _ Analytical Parameters/Sample Collection Method: g) Yes oNo DYes ~No 0 ~ 0 0 [2j Yes o No DYes IKJ No 0 JXI 0 0 Nutrients rn Yes DNo DYes ~ No 0 IE 0 0 Other Non [2 Yes DNo DYes IKl No 0 ~ 0 0 Gross Alpha ~ Yes oNo Yes o No 0 ~ 0 0 QC Samples Associated with this Location: o Rinsate Blank o Duplicate Duplicate Sample Name: #cf/S: () o Field Data Record-Seeps and Springs Sampling Seep or Spring Location: ....:E:t:::.....!</.A.~\:.!.)·I\.I=I---....:.s~'f~e.=.!!.:5~------------_ Date For Initial Sampling Visit: 7,/J ~/2/J/J Sample Collected:~ Yes 0 No Time: /J~c3 Date For Second Sampling Visit:. ________ Time: ________ _ Sample Collected: 0 Yes 0 No Date For Third'Sampling Visit:. ________ Time:. _________ _ Sample Collected: 0 Yes 0 No Sampling Personnel: Oro B-tw, ~il IkttltffStz4 5U 711744 Weather Conditions at Time of Sampling: cJoVt..i?'b -cj~w Itt 7' Estimated Seep or Spring Flow Rate: ....i./,~'ud~-::::...LJ.£.. .. :-;SL--f,;~:;Zj~r;!o!;r1~.L----------- Field Parameter Measurements: -pH L 10 -Temperature (0C) --It~~c....., -LZ-lf~ ________ _ -Conductivity !!MHOC/cm _+.1 ~3' ..... 3L7.1.-..,,.....-______ _ -Turbidity (NTU) (if measured)'_ ~c:2:...",,~Q~~--r----- -Redox Potential Eh (mV) (if measured) --..-;L(f...I./~I----- Analytical Parameters/Sample Collection Method: o No 0 Yes D o o oNo DYes ~'No o o o o No 0 Yes ~ No o o o Gross Alpha ~ Yes 0 No Yes 0 No o o o QC Samples Associated with this Location: o Rinsate Blank ~ Duplicate tJ, Duplicate Sample Name: ·[).pdt.. :re.~ v , ~ f o () Field Data Record-Seeps and Springs Sampling Seep or Spring Location: ---"'~A"",Jt4~j.'-n..."A.""~~,",--_____________ _ Date For Initial Sampling Visit:--:f/L 11ft2/! Time: llitC Sample Collected: 0 Yes jij'No Date For Second Sampling Visit: '::f I 'l j J 26 'I , Time: /5 )0 Sample Collected: 0 Yes ~ No Date For Third Sampling Visit: $I! Lf I Z u I ( Time: /~2.() Sample Collected: 0 Yes 111 No Sampling Personnel: .....,~~aa.!:r1.L.....-jf1~C<.>l<t"""(--r/-V-Ja:;R:~""'k1O'--+~~'---""""-_-:--__ ~;--__ Weather Conditions at Time of Sampling:-L~O::l.--itI<'-f-ZULq-"Z{.!4,~-'t:...L!l~ __ _ Estimated Seep or Spring Flow Rate: ~L0!~~a.-(!Jfl.,.~-.-:.:~~~:;;a~~-.4~~ Field Parameter Measurements: -pH -Temperature (0C) _-_____________ _ -Conductivity f,lMHOC/cm ___________ _ -Turbidity (NTU) (if measured),_-________ _ -Redox Potential Eh (mV) (if measured) ______ _ Analytical Parameters/Sample Collection Method: VOCs DYes oNo DYes o No 0 0 THF DYes oNo DYes o No 0 0 Nutrients DYes oNo DYes o No 0 0 Other Non DYes oNo DYes oNo 0 0 Gross Alpha DYes oNo DYes o No 0 0 QC Samples Associated with this Location: o Rinsate Blank o Duplicate Duplicate Sample Name: 0 0 0 0 0 0 0 0 0 0 TabB Field Parameter Measurement Data Field parameters . , Location -",' pH r,~~'· Couduttivity~'~, 0, ... , :!~~ .~'·J:~;tbJmty~. ''',":;"\,,., ~" -~"~ -~' . Reoox ' " .,,~<',:,;;' -'~~"' . ,'1\~~p o!£'.~:/~;"i. ~ Date May July May July May July May July May July Not Not Entrance Spring 7.83 6.84 931.6 982.6 Measured 120.7 Measured 538 14.26 17.46 Not Not Cottonwood Seep 7.04 6.84 1402 16.31 Measured 60.9 Measured 441 16.5 15.91 Back Spring (Duplicate of Ruin Not Spring) 7.44 7.1 1332 1337 measured 0 Not measured 414 12.83 16.79 Not Ruin Spring 7.44 7.1 1332 1337 measured 0 Not measured 414 12.83 16.79 NOt Not I\lot Not measured measured Not measured Not measured measured Westwater Seep 6.67 (dry) 1234 (dry) measured (dry) Not measured (dry) 15.13 (dry) TabC Survey Data and Contour Map Seeps and Springs Survey Locations December 2009 Survey Location Latitude (N) Longitude (W) Elevation FROG POND 37°33'03.5358" 109°29'04.9552" 5589.56 CORRAL CANYON 37°33'07.1392" 109°29'12.3907" 5623.97 ENTRANCE SPRING 37°32'01.6487" 109°29'33.7005" 5559.71 CORRAL SPRINGS 37°29'37.9192" 109°29'35.8201" 5383.35 RUIN SPRING 37°30'06.0448" 109°31'23.4300" 5380.03 COTTONWOOD 37°31 '21.7002" 109°32'14.7923" 5234.33 WESTWATER 37°31 '58.5020" 109°31 '25.7345" 5468.23 Verification Survey July 2010 RUIN SPRING 37°30'06.0456" 109°31'23.4181 " 5380.01 COTTONWOOD 37°31 '21.6987" 109°32'14.7927" 5234.27 WESTWATER 37°31'58.5013" 109°31'25.7357" 5468.32 ® estimated dry area (kriged Brushy Basin surface> kriged perched water surface) MW-5 perched monitoring well showing .5503 elevation in feet amsl PIEZ-1 perched piezometer showing 9 5594 elevation in feet amsl X dry abandoned perched well RUIN SPRING 6 seep or spring showing elevation in 5380 feet amsl HYDRO GEO CHEM, INC. KRIGED 3rd QUARTER, 2011 WATER LEVELS (All seeps/springs except Cottonwood Seep included in contouring) REFERENCE H:1718000/ce1l4bdryareaJ UTMbase/nodrpiezlUTMwlq311 nodr.srf FIGURE C-l @ :1,:::-- .... ' estimated dry area (kriged Brushy Basin surface> kriged perched water surface) estimated areas of saturated thickness < 5 feet MW-5 perched monitoring well showing .5503 elevation in feet amsl PIEZ-1 perched piezometer showing 61 5594 elevation in feet amsl D;-;482 perched piezometer installed May, 2011 showing elevation in feet amsl DR-16 X abandoned perched well or boring RUIN SPRING 6 seep or spring showing elevation in 5380 feet amsl HYDRO GEO CHEM, INC. KRI GED 3rd QUARTER, 2011 WATER LEVELS (All seeps/springs except Cottonwood Seep includ ed in the contouring) APPROVEO OATE REFERENCE H:1718000/ceIl4bdryareal UTMbase/UTMwlq311.srf FIGURE C-2 TabD Analytical Laboratory Data July 2011 Analytical Data 463 West 3600 South Salt Lake City, UT 84115 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Jo Ann Tischler Denison Mines 1050 17th Street, # 950 Denver, CO 80265 TEL: (303) 389-4132 RE: Seeps and Springs Dear Jo Ann Tischler: Lab Set ID : 1107303 American West Analytical Laboratories received 5 sample(s) on 7115/2011 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, Idaho, and Missouri. 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 quantitation 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 G Rocha a S e ON: cn=Jose G. Rocha, • o=American West Analytical Z Laboratories, ou=Quality Assurance Officer, R a C h e;;''ai~OSe@!aWal.labs.com, ~us ~ fl Date: 2011.07.2213:45:39 'L -06'00' Laboratory Director or designee Report Date: 7/22/2011 Page 1 of 21 All analyses applicable: to the CWA. SDWA. and RCRA are performed in accQrdance to NELAC protocols. Pertinent sampling inforn.lation is located on the attached COc. This report is prQvided for the exclusive use of the addressee. Privileges .of subsequent use ofthe:.naine of this company or any member of its staff. or reproduction of this report in connection with thead\'.ertis.~inimt. promotion or sale or any product or process,:·or i.~ connection with the re-publication of this report [.or ~y . purpose other than for the addressee will be grrulled only on contact. This company accepts no responsibility except for the due perfonnance of inspection ruuilor analysis in good faith and according to the rules of the trade and of science. American West ANALYTI C AL LAB O RATORI ES 463 West 3600 South Salt Lake City, UT 84115 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Client: Project: Lab Set ID: Date Received: Lab Sample ID 1107303-001 A 1107303-002A 1107303-003A 1107303-004A 1107303-005A SAMPLE SUMMARY Denison Mines Contact: Jo Ann Tischler Seeps and Springs 1107303 7115/2011 1000h Client Sample ID Date Collected Matrix Analysis Entrance Seep 7113/2011 0815h Aqueous VOA by GC/MS Method 8260C/5030C Back Spring 7113/2011 1120h Aqueous VOA by GC/MS Method 8260C/5030C Cottonwood Spring 7113/2011 1020h Aqueous VOA by GC/MS Method 8260C/5030C Ruin Spring 7/13/2011 1120h Aqueous VOA by GC/MS Method 8260C/5030C Trip Blank 7113/2011 Aqueous VOA by GC/MS Method 8260C/5030C Report Date: 7/22/2011 Page 2 of 21 All anruyses applicable to the CWA, SDWA, WId RCRA are performed in accordance to NELAC protocols., Pertinent sampling information is located on the attach~d Cac. This report is provided for the exclusive lise of the addressee. Privileges 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 re-publicaiion of tins 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. 463 West 3600 South Salt Lake City, UT 84115 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-Iabs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Volatile Case Narrative Client: Denison Mines Contact: Jo Ann Tischler Seeps and Springs 1107303 Project: Lab Set ID: Sample Receipt Information: Date of Receipt: Date(s) of Collection: Sample Condition: C-O-C Discrepancies: Method: Analysis: 7115/2011 7/13/2011 llitact None SW-846 8260C/5030C Tetrahydrofuran General Set Comments: Tetrahydrofuran was not observed above reporting limits. Holding Time and Preservation Requirements: All samples were received in appropriate containers and properly preserved. The analysis and preparation of all samples were performed within the method holding times following the methods stated on the analytical reports. Analytical QC Requirements: All instrument calibration and calibration check requirements were met. All internal standard recoveries met method criterion. Batch QC Requirements: MB, LCS, MS, MSD, RPD, and Surrogates: Method Blanks (MBs): No target analytes were detected above reporting limits, indicating that the procedure was free from contamination. Laboratory Control Sample (LCSs): All LCS recoveries were within control limits, indicating that the preparation and analysis were in control. Matrix Spike 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: 7/22/2011 Page 3 of21 All analyses applicable to .the CWA, SDWA. and RCRA are perfonned in accord~ce to NELAC protocols. Pertinent sampling informati.on is located on the attached COCo This report is proviqed for the exclusive use of the addressee. Privileges of. subsequent use of tile name 'of this company or My member of its stafT, or f€lproduction-Of this report in cOllnection with the advertisement; promotion or sale of any product or process. or.in c.omieclion with the fe-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 perfomiance of inspection and/or analysis in good faith mId according to the rules of the trade and of science. . ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines Seeps and Springs 1107303-001A Client Sample ID: Entrance Seep Collection Date: 711312011 0815h Received Date: 711512011 1000h Analytical Results Analyzed: 7/15/2011 1144h Units: c:g/L 463 West 3600 South Dilution Factor: 1 Salt Lake City, UT 84115 Compound Contact: Jo Ann Tischler Method: SW8260C VOAs by GC/MS Method 8260CIS030C CAS Reporting Analytical Number Limit Result Qual ------------------------------------------------------------------- Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobencene Surr: Dibromofluoromethane Surr: Toluene-d8 10 0 -00 17060-07-0 460-00-4 1868-53-7 2037-26-5 1.00 0 1.00 77-144 103 80-123 107 80-124 103 80-125 100 Report Date: 7/22/2011 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 ~OC. This report is provided for the exclusive use of Ih~ addressee. Privileges of . subsequent use of the name of this company or any m~mber of its slafT, or reproduction of this report in conn~clion "dth the advertisement, promotion or sale of an)' .product.or process, or in connection with the re.publica.~iori 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. ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines Seeps and Springs 1107303-002A Client Sample ID: Back Spring Collection Date: 711312011 1120h Received Date: 711512011 1000h Analytical Results Analyzed: 7115/2011 1203h Units: cgJL 463 West 3600 South Dilution Factor: 1 Salt Lake City, UT 84115 Compound Contact: Jo Ann Tischler Method: SW8260C VOAs by GC/MS Method 8260C/5030C CAS Reporting Analytical Number Limit Result Qual ------------------------------------------------------------------- Phone: (801)263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluoroben[]:ne Surr: Dibromofluoromethane Surr: Toluene-d8 10 0 -00 17060-07-0 460-00-4 1868-53-7 2037-26-5 l.00 o l.00 77-144 107 80-123 107 80-124 102 80-125 98.8 Report Date: 7/22/2011 Page 5 of21 All analyses applicable to the, CWA, SDWA, and ReRA are performed in accordan~ to NELAC protocols. Pertinent sampling information ls located on the attached COCo This report is pro\'ided for the exclusive use of the addressee. Privileges of subsequent lise of the name ofihis company or any member of its siaff, or reprodu~lion of this report in connection with the advertisement, promotion or sale of any product or process, or in (jonnecllon with the fe-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 niles oflhe trade and of science. ORGANIC ANALYTICAL REPORT· Client: Project: Lab Sample ID: Denison Mines Seeps and Springs 1107303-003A Client Sample ID: Cottonwood Spring Collection Date: 7/13/2011 1020h Received Date: 7/15/2011 1000h Analytical Results Analyzed: 7/15/2011 1222h Units: ['giL 463 West 3600 South Dilution FactOl': 1 Salt Lake City, UT 84115 Compound Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Tetrahydrofuran SUIT: 1,2-Dichloroethane-d4 Surr: 4-Bromofl uoroben []:ne 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 lO O-O 0 l.00 o l.00 17060-07-0 77-144 111 460-00-4 80-123 108 1868-53-7 80-124 104 2037-26-5 80-125 100 Report Date: 7/22/2011 Page 6 of 21 AII.anruyses applicable to the CWA, SDWA, and ReRA a~e perfonned in accordance to NELAC protocols. Pertin,en! sampling information is located on the attached COC. This report is provided for the exclusive use of the agdressee. Privileges of . subsequent use of the name of this company or any member of its slaff, or reproduction of this report in connection '''ith_the advertisement, promotion or sale of nn}~.product or process, or in connection with the fe-publication of this.report for any piirpose 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 analys)"s in good faith and according to the rules of the trade aiid of science. ORGANIC ANALYTICAL REPORT Client: PI'oject: Lab Sample ID: Denison Mines Seeps and Springs 1107303-004A Client Sample ID: Ruin Spring Collection Date: 7/l3/2011 1120h Received Date: 7/15/2011 1000h Analytical Results Analyzed: 7/1512011 1240h Units: cg/L 463 West 3600 South Dilution Factor: 1 Salt Lake City, UT 84115 Compound Contact: Jo Ann Tischler Method: SW8260C VOAs by GC/MS Method 8260CIS030C CAS Reporting Analytical Numbel' Limit Result Qual ------------------------------------------------------------------- Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-Iabs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofl uoroben uene Surr: Dibromofluoromethane Surr: Toluene-d8 10 0 -0 0 17060-07-0 460-00-4 1868-53-7 2037-26-5 1.00 0 1.00 77-144 114 80-123 108 80-124 105 80-125 98.7 Report Date: 7/22/20 II Page 7 of 21 All analyses applicable to the CWA, SDWA, and ReRA are performed in accordance 10: NELAC protocols. Pertinent sampling information is located on the attached COCo This report is prO\·jded fOf-,he exclusi\'e use orthe 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 Ihe advertisemeru, promotion or sale of any product or process, or in connection" with the re·publicalion of Ihis 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, ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines Seeps and Springs 1107303-005A Client Sample ID: Trip Blank Collection Date: 7/13/2011 Received Date: 7/15/2011 lOOOh Analytical Results Analyzed: 7/1512011 1250 h Units: cgJL 463 West 3600 South Dilution Factor: Salt Lake City, UT 84115 Compound Contact: Jo Ann Tischler Method: SW8260C VOAs by GC/MS Method 8260C/S030C CAS Reporting Analytical Number Limit Result Qual ------------------------------------------------------------------- Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobencene Surr: Dibromofluoromethane Surr: Toluene-d8 lOO-OO 17060-07-0 460-00-4 1868-53-7 2037-26-5 1.00 0 1.00 77-144 114 80-123 108 80-124 105 80-125 98.3 Report Date: 7/22/201 1 Page 8 of 21 All analyses applicable to the CWA, SDWA, and RCRA are performed in accordance to NELAC protocols. Pertinent,sampling information is located on the attached cae. '}1lis report is provided for the e.xclusive use of the addr~see. Privileges of subs~quEmllise of the name of this company or any member,ofits staff, or reproduction of Ibis report in connection with the advertisement, promotion or sale of any produ~t or process, or in connection with the fe-publication of this report for any purpose other than for the addressee will be granted only on contact. This company accepts no responsibility except '[or the due perfonnance of inspection and/or analysis in good faith and according to the rules of the trade and of science. .ANALYTI CAL LABORATORIES Client: Denison Mines Lab Set ID: 1107303 Project: Seeps and Springs Sample ID Analyte . LCS VOC 071511A Tetrahydrofuran LCS VOC 071511A Surr: 1,2-Dichloroethane-d4 LCS VOC 071511A Surr: 4-Bromofluoroben cene LCS VOC 071511A Surr: Dibromofluoromethane LCS VOC 071511A Surr: Toluene-d8 463 West 3600 South Salt Lake City, UT 84115 Phone: (801) 263-8686, Toll Free: (888) 263-8686, Fax: (801) 263-8687 e-mail: awal@awal-labs.com, web: www.awal-labs.com Units CglL DREC DREC DREC DREC QC SUMMARY REPORT Amount Method Result Spiked SW8260C 14.1 20.00 SW8260C 52.0 50.00 SW8260C 50.8 50.00 SW8260C 52.0 50.00 SW8260C 40 6 50.00 Contact: Dept: QCType: Original Jo Ann Tischler MSVOA LCS Amount %REC Limits 0 70.4 43-146 104 60-132 102 85-118 104 80-120 001 81 -120 %RPD RPD Limit Kyle F. Gross Laboratory Director Jose Rocha QA Officer Qual Date Analyzed 7/15/2011 0708h 7/15/2011 0708h 7115/2011 0708h 7115/2011 0708h 7/1512011 0708h Report Date: 7/22/2011 Page 00f21 All analyses applicable to the CWA, SDWA, and ReRA are petformed 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 fe-publication of this report for any purpose other than for the addressee will be granted only on contact. This company accepts no responsibility exce.pt for the due performance of inspection and/or analysis in good faith and according to the rules of the trade and of science. American West ANALYTICAL LABORATORI ES Client: Denison Mines Lab Set ID: 1107303 , Project: Seeps and Springs Sample ID Analyte MB VOC 071511A Tetrahydrofuran MB VOC 071511A SUIT: 1,2-Dichloroethane-d4 MB VOC 071511A SUIT: 4-Bromofluorobencene MB VOC 071511A SUIT: Dibromofluoromethane MB VOC 071511A SUIT: Toluene-d8 463 West 3600 South Salt Lake City, UT 84115 Phone: (801) 263-8686, Toll Free: (888) 263-8686, Fax: (801) 263-8687 e-mail: awal@awal-labs.com, web: www.awal-labs.com Units cglL OREC OREC OREC OREC QC SUMMARY REPORT Amount Method Result Spiked SW8260C 0 1.00 SW8260C 51.0 50.00 SW8260C 53,0 50.00 SW8260C 51.4 50.00 SW8260C 50.3 50.00 Contact: Dept: QC Type: Original Jo Ann Tischler MSVOA MBLK Amount %REC Limits 104 6G132 106 85-118 103 80-120 101 81-120 %RPD RPD Limit Kyle F. Gross Laboratory Director Jose Rocha QA Officer Qual Date Analyzed 7115/2011 0746h 7/15/2011 0746h 7/1512011 0746h 7/15/2011 0746h 7115/2011 0746h Report Date: 7/22/2011 Page 10 of21 All analyses applicable to the CWA. SDWA, and ReRA are perfonned 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, 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. ANALYTlCAL LABORATORIES Client: Denison Mines Lab Set ID: 1107303 Project: Seeps and Springs Sample ID Analyte 1107303-001AMS Tetrahydrofuran .. 1107303-001AMS Surr: 1,2-Dichloroethane-d4 1107303-001AMS SUIT: 4-BromofluorobenCl:ne 1107303-001AMS SUIT: Dibromofluoromethane 1107303-001AMS SUIT: Toluene-d8 463 West 3600 South Salt Lake City, UT 84115 Phone: (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: Jo Ann Tischler Dept: MSVOA QCType: MS Amount Original Units Method Result Spiked Amount %REC Limits CglL SW8260C 17.7 20.00 0 88.6 43-146 DREC SW8260C 58.0 50.00 116 77-144 DREC SW8260C 40 4 50.00 OS.8 80-123 DREC SW8260C 52.6 50.00 105 80-124 DREC SW8260C 47.6 50.00 CD.3 80-125 %RPD RPD Limit Kyle F. Gross Laboratory Director Jose Rocha QA Officer Qual Date Analyzed 7/15/2011 B18h 7115/2011 1318h 7/15/2011 B18h 7/1512011 B18h 7/15/2011 B18h Report Date: 7/2212011 Page 11 of21 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 fe-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 of the trade and of science. American West ANA LYTICAL LABORATOR I ES Client: Denison Mines Lab Set ID: 1107303 . Project: Seeps and Springs Sample ID Analyte 1107303-001AMSD Tetrahydrofuran 1107303-001AMSD SUIT: 1,2-Dichloroethane-d4 1107303-001AMSD SUIT: 4-Bromofluoroben Cl:ne 1107303-001AMSD SUIT: Dibromofluoromethane 1107303-001AMSD SUIT: Toluene-d8 463 West 3600 South Salt Lake City, UT 84115 Phone: (801) 263-8686, Toll Free: (888) 263-8686, Fax: (801) 263-8687 e-mail: awal@awal-labs.com, web: www.awal-labs.com Units CgIL OREC OREC OREC OREC QC SUMMARY REPORT Amount Method Result Spiked SW8260C 18.7 20.00 SW8260C 58.4 50.00 SW8260C 40 6 50.00 SW8260C 53.2 50.00 SW8260C 47.0 50.00 Contact: Dept: QC Type: Original Jo Ann Tischler MSVOA MSD Amount %REC Limits 0 03.5 43-146 117 77-144 002 80-123 106 80-124 [5.0 80-125 %RPD 5.38 RPD Limit 25 Kyle F. Gross Laboratory Director Jose Rocha QA Officer Qual Date Analyzed 7115/2011 1337h 7/15/2011 1337h 7115/2011 1337h 7/15/2011 1337h 7/15/2011 1337h Report Date: 7122/2011 Page 12 of 21 All analyses applicable to the CWA, SDWA, and ReRA 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 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. Data Path Data File Aeq On Operator Samp le Mi se ALS Vial Quant Time : Quant Method Quant Title QLast Update Response via !Abundance I 1200000 I 1150000 I I 1100000 I I I I 1050000 I 1000000 I 950000 900000 850000 800000 750000 700000 650000 600000 550000 500000 450000 400000 350000 300000 250000 200000 150000 100000 50000 Quantitation Report C:\msdehem\1\DATA\JULII-C\15JULIIA\ M73L3031.D 15 Jul 2011 11:44 am 1l07303-001A SAMP 5 .0ML 10F3 6 Sample Mu l tiplier : 1 Jul 15 12:48 :29 2011 C:\MSDCHEM\1\METHODS\AFULLW_35.M VOA Calibration Thu Jul 07 16 :15 :38 2011 Initial Calibration (QT Reviewed) TIC: M73L3031.0\data.ms (f) g Jl! w E e 0 ~ '0 E e .0 0 ~ (f) (f) g Jl! W ~ :c .Q 0 "t ~ (f) => (f) AFULLW_35 .M Fri Jul 15 12:49:35 2011 Report Date: 7/22/2fYf:lIgEVtlge'J13 of21 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\JUL11-C\15JUL11A\ M74L3032.D 15 Jul 2011 12:03 pm 1l07303-002A SAMP 5.0ML 10F3 7 Sample Multiplier: 1 Jul 15 12:48:52 2011 C:\MSDCHEM\1\METHODS\AFULLW_35.M VOA Calibration Thu Jul 07 16:15:38 2011 Initial Calibration (QT Reviewed) Abundance--TIC: -M7 4L3032. D\data.ms 1150000 1100000 1050000 1000000 950000 900000 I 850000 i I ! 800000 . ! 750000 700000 650000 600000 550000 500000 450000 400000 350000 300000 250000 200000 150000 100000 50000 o J\.. t[i!11~_2--9-'L 2.50 3.00 3.50 4.00 AFULLW_3S.M Fri Jul 15 12:50:11 2011 en en ~ or c J'l J'l 1ii 1ii E e e 0 g :c g "6 0 E '" e ,Q 15 0 15 en en 7.00 " en o ~ I !!!! I !!!! I !!!! I!!!! I!!!! I!! 7.:.0.5"'0--'8 .... ___ 00."---=.8:..--.5=0_ 9.00 9.50 10.00 10.50 11.00 11 .50 Report Date: 7/22/2ti'flJGEJ.>'tlgtflI4 of21 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Re sponse via Quantitation Report C:\msdehem\1\DATA\JUL11-C\15JUL11A\ M75L3033.D 15 Ju1 2011 12:22 pm 1l07303-003A SAMP 5.0ML 10F3 8 Sample Multiplier: 1 Jul 15 12:49:08 2011 C:\MSDCHEM\1\METHODS\AFULLW_35.M VOA Calibration Thu Jul 07 16:15:38 2011 Initial Calibration (QT Reviewed) Abundance TIC: M75L3033.0\data.ms 1100000 1050000 1000000 950000 900000 850000 800000 750000 700000 650000 600000 550000 500000 450000 400000 350000 300000 250000 200000 150000 100000 50000 ~ime .. > 0 A _~L2~_~_~~L3~0 AFULLW_35.M Fri Ju1 15 12:50:44 2011 (/) oi ~ ID E e g 'l5 E e ,Q 0 " en I 5.00 (/) :!1 J'! ID e 0 :5 0 N. " (/) 5.50 \ 6.00 6.50 7.00 7.50 8.00 I 8.50 T 9.00 I "1 ""1""1" 9.50 10.00 10.50 11 .00 11 .50 Report Date: 7/22/2{1fJjQEp"fige±15 of21 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quan t Method Quant Title QLast Update Response via ! bundance 10S0000 1000000 9S0000 900000 8S0000 800000 7S0000 700000 6S0000 600000 SSOOOO SOOOOO 4S0000 400000 3S0000 300000 2S0000 200000 1S0000 I 100000 Quantitation Report C:\msdehem\I\DATA\JULII-C\15JULIIA\ M76L3034.D 15 Jul 2011 12:40 pm 1l07303-004A SAMP 5.0ML 10F3 9 Sample Multiplier: 1 Jul 15 13 :45 :00 2011 C:\MSDCHEM\I\METHODS\AFULLW_35.M VOA Calibration Thu Jul 07 16 :15 :38 20 11 Initial Calibration (QT Reviewed) TIC: M76L3034.D\data.ms .; ... "0 "0 ~ ~ en ~ <Ii co '" '" .0 !'! e '" ~ .0 f e g ~ '\3 ( ~ E 0 e ~ OJ ~ '" " .0 e en g u: 0 ~ en CI!. ~ ~ oj .c 2 ~ Q; e ~ .Q 13 '0 is E "'-e ,Q 0 " !5 en en 'I SOOOOo ~~~~~~rr~~~~TT",,~,,~,,~~rnrn"~+T\TT,,~nn~~TT~rrrnr~"~TTrrrn""~TTrrrnrn,,1 ~ime--> --, 2.00 2.50"--""3.-,,,010,,--3e..c.5,,,,0,---,4"-.:..O,,-,0 4,.:=.S 1,,-0 ----"-S,,,.O 1,,-0 ----"-S,1Q,_6"".::<:00"----"6.50 7 . .".'.0""0,---"-,7 . ."SO"----=8,,,,.00 . 8.S0 '~.b~" ~.h~' '1 ~~~O' '1 'o~io' '1 '1 ~~o'~~.iJ AFULLW_35 .M Fri Jul 15 13 :45 :41 2011 Report Date: 7 /22/2l'Y/3Ig EVagtf±16 of 21 Data .Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C :\msdehem\1\DATA\JULll-C\15JUL11A\ M77L3035.D 15 Jul 2011 12 :59 pm 1l07303-005A SAMP 5.0ML 10F2 10 Sample Multiplier: 1 Quant Time: Jul 15 13:45:15 2011 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_35 .M Quant Title VOA Cali bration QLast Update Thu Jul 07 16:15:38 2011 Response vi a Initial Calibration (QT Reviewed) lAbundance TIC: M77L303S.D\data.ms 1100000 10S0000 "" 1000000 9S0000 .,; "0 "0 ~ ~ i!l ~ ~ .0 OJ e .0 0 e :s ( 0 :c 0 0 *-a f-a !!l ~ 1S0000 100000 SOOOO ~ime-> 094J..."rr2.'O"'0 FM2'.S..,.0..,..,..3.,...T"00,....,..,-r3..,..S-r0.,..,-4'.'OO"'-.4'.S'O-ri-'S'.0"0-l,!-rl,-S:lrS'0"""'-6". 0'0,.J,..+6.'SI0"""'-"7'.bl,-0'r-r7-r~-/'-rSOPn""'S'.0-+orts'.'SOrr-r'9-r.0"'0"""'-9r;.S'0""""1""O'.0'OrM1 0'.""SO""""J '1 '.0""0"""11"'.S"""0 I AFULLW_35.M Fri Jul 15 13 :46 :15 2011 Report Date: 7 /22/2ijJ3H E¥ag&±l 7 of 21 Data Pa.th 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\JULII-C\15JULIIA\ M70LCS20.D 15 Jul 2011 7:08 am LCS VOC 071511A LCS SEE COVERSHEET FOR ID AND AMOUNTS 3 Sample Multiplier: 1 Jul 15 10:35:52 2011 C:\MSDCHEM\1\METHODS\AFULLW_35.M VOA Calibration Thu Jul 07 16:15:38 2011 Initial Calibration (QT Reviewed) fl.bundance TIC: M70LCS20.D\data.ms 2000000 1900000 1800000 1700000 1600000 1500000 '" "0 1400000 ~ 1300000 "l. '" "9 11 g ~ (/} ~ gf (/} ~ 1200000 Q) .0 gf e g ~ '15 1100000 1000000 Q) E .0 e e g a:J 0:: " 0 ~ (/} ~ >. 900000 x "'-"" E AFULLW_35.M Fri Jul 15 10:37:04 2011 Report Date: 7/22/2l'i'fllgEVuge±1 0 0[21 Data Path. Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via 1100000 1050000 1000000 950000 900000 850000 800000 750000 700000 650000 600000 550000 500000 450000 400000 350000 300000 250000 200000 150000 100000 50000 Quantitation Report C:\msdehem\1\DATA\JULII-C\15JULIIA\ M72LMBLK.D 15 Jul 2011 7:46 am MB VOC 071511A MBLK 5.0ML 5 Sample Multiplier: 1 Jul 15 10:36:11 2011 C:\MSDCHEM\1\METHODS\AFULLW_35.M VOA Calibration Thu Jul 07 16:15:38 2011 Initial Calibration (QT Reviewed) TIC: M72LMBLK.D\data.ms (/) ~ l' t;; E e g '5 E e .0 is ~ (/) (/) ~ ro ~ ~ ~ is N. " (/) " (/) O~~~~TT~ITTTTTTITTr~l rr"rr"nr~H-~~-n""~~""TIYTTT'+I~TT~rrrr;rl I I I I I I I I I "1" "1"" 1" "1' ,I 2.00 ..:.2,-".5""0,----"3,,-,-.,,,00,------:3"50 ~O 4.50 5.00 "'5.""50"---"'6."'-00~-"-6""'.5"_0 _7.00 7.50 8.:~~.JlJ2L9.50 10.00 10.50_1LQQ..J..1.!.!50 ! Time--> AFULLW_35.M Fri Jul 15 10:37:37 2011 Report Date: 7/22/2¥l'fllgEp'age'l1 0 0f21 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via lA.bundance 1350000 1300000 1250000 1200000 1150000 1100000 1050000 1000000 950000 900000 850000 800000 750000 700000 650000 600000 550000 500000 450000 400000 350000 300000 250000 200000 150000 100000 50000 Quantitation Report C:\msdehem\I\DATA\JULII-C\15JULIIA\ M78S3031.D 15 Jul 2011 1:18 pm 1l07303-001AMS MS 5.0ML 20F3 11 Sample Multiplier: 1 Jul 15 13:30:37 2011 C:\MSDCHEM\I\METHODS\AFULLW_35.M VOA Calibration Thu Jul 07 16:15:38 2011 Initial Calibration (Not Reviewed) TIC: M78S3031 .D\data.ms " (f) 11 (I) >. x Q. '" E AFULLW_35.M Fri Jul 15 13:46:54 2011 Report Date: 7/22/2ijFlJGEVug#20 of21 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C;\msdehem\1\DATA\JULII-C\15JULIIA\ M79D3031.D 15 Jul 2011 1:37 pm 1l07303-001AMSD MSD 5.0ML 30F3 12 Sample Multiplier: 1 Quant Time: Jul 15 13:49:41 2011 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_35.M Quant Title VOA Calibration QLast Update Thu Jul 07 16:15:38 2011 Response via Initial Calibration (Not Reviewed) ~bundance ---------- 1400000 TIC: M79D3031 .D\data.ms 1350000 1300000 1250000 1200000 1150000 1100000 1050000 1000000 950000 900000 a50000 aooooo 750000 700000 650000 600000 550000 500000 450000 400000 350000 300000 250000 200000 150000 100000 ill 0 ~~ a: .<=~ 0 ·'1 " g ~~ 2 <ll '<=u 1ii ~ Q)():.o e :gg cZ!' .Q 2'; Go'<> -<ll m im ~~ 2 1ii ~ CE~ ~} E ~ ~Q} 0 o.C E W o~ o.Q ~<ll e ~ o.u <D g« 50000 ~ime--> Ohrf~2."F0,p0 Fr-12F"1.5--tOY.3';L.'r00,.-,J,~3~.5¥0+-r-4'.~00:'l-r-r'4-4-.5Lt-oW5i-'.ok_ o-'.lr. 45~.5""'0 ,L\-l6p..,.0'0..J.,!.l,-_-+'6.~5',l0 l"_A"LI'-r.Q...L,0-H7,l.1,.L50i-,l,'..V,a.!..l. o.!l,-olJ-41 ... r+-.--,J-,l..,-1,L\Lr-,rrr..,..,...,....,...,..,.-,,,-,--,,.,-r-r-1-rT.,.--, AFULLW_35.M Fri Jul 15 13:50:45 2011 Report Date: 7/22/2lYflIgEp"tlgtfl21 of21 American West Analytical Laboratories WORK ORDER Summary Work Order: 1107303 · Client: Denison Mines Page 1 of 1 7115/20 11 Client ID: DENIOO Contact: JoAnn Tischler Project: Seeps and Springs QC Level: LEVEL III WOType: Project Comments: No Hard Copies (UL). QC 3 & Smmnary. EDD-CSV. Report THF to 1 Ilg/L.; 1)'f.:> Sample ID Client Sample ID Collected Date Received Date Date Due Matrix Test Code Sel Storage 11 07303-00 1A Entrance Seep 7/13/2011 081511 7/15/2011 1000h 7129/2011 Aqueous 8260-W ~ VOCFridge 3 1107303-002A Back Spring 7113/2011 1120h 8260-W ~ VOCFridge 11 07303-003A Cottonwood Spring 7113/2011 1020h 8260-W ~ VOCFridge 1107303-004A Ruin Spring 7113/2011 1120h 8260-W ~ VOCFridge 1107303-005A Trip Blank 7/13/2011 8260-W ~ VOCFridge ft ~ ~ I Sheett of 1 OENISO~""AI MINES Hb~a~ CHAIN OF CUSTODY Samples Shipped to: American West Analytical Lab 463 West 3600 South Contact: Ryan Palmer or David Turk Ph: 435 678 2221 Salt Lake City, Ut 84115 rpalmer@denisonmines.com dturk@denisonmines.com Chain of Custody/Sampling Analysis Request Project Sam lers Name Samplers Si nature Seeps and s rin s Ryan Palmer Date Time Sample 10 Collected Collected Laboratory Analysis Requested Entrance seep 7/13/2011 815 THF Back spring 7/13/2011 1120 THF Cottonwood S[JI"ing 7/13/2011 1020 THF Ruin Spring 7/13/2011 1120 THF '"Tll.f) \6~ 7il?JLl ( -ri-lt:' 'I I Please notify Ryan Palmer or Tanner Holliday of Reciept tempature on these samples Immediately! Thank you. Relinquished By:(Signature) DatelTime Received By:(Signature) 7/14/2011 1330 DatelTime LabSetID: \~O\00~ Samples Were: COC Tape Was: Container Type: IH'Shipped By: l~~~ pr~t on Outer Package o A W AL Supplied Plastic ../ o Hand Delivered mes 0 No 0 N/A o A W AL Supplied Clear Glass / o Ambient un~n 011 Outer package D A WAL Supplied Amber Glass / ~Chilled es DNo /DN/A ' Temperature 3.4-°C presen~ample D AWAL Supplied VOA/~(ViaIS D Amber D Clear D Head ce D No Headspace Rec. Broken/Leaking DYes ~o DN/A ' 0 Yes 0 D N/A D Non A W AL Supp!ie<f' Container Notes: Unbroken on Sample / / DYes D No I!l1i/A Properly Preserved !}(yes DNo DN/A 'Notes: Notes: Rec. Within Hold llJIYes DNo Discrepancies Between Labels and COC Notes: Notes: AOO /- Bottle Type Preservative AUpHsOK / Ammonia pH <2 H2SO4 / COD pH <2 H2SO4 /' 1/ Cyanide PH >12 NaOH / Metals pH <2 HN03 / N02 &N03 pH <2 H2SO4 ./' Nutrients _pH <2 H2SO4 / 0&0 Phenols Sulfide TKN TOC TP04 TPH Procedure: 1) 2) 3) 4) 5) .6) 7) pH <2 HCL /' pH <2 H2SO4 ' /- JlH> 9NaOH, ZnAC / -'pH <2 H2SO4 /' pH <2 H3P04 / pH <2 H2SO4 /' pH <2HCL / ../, / /- l/ Pour a small amount of sample in the sample lid Pour sample from Lid gently over wide r",nge pH paper Do Not dip the pH paper in the sample bottie 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 cOl1versation on coe Samples may ~e adjusted at client request , ~. No/Rec. /' DYes ffNo I EN:RGY LABORATORIE;S www.energylab.com Analytical Excel/ence Slnc, 1952 ~: . ~elena, MT 877472~0711 • Billings, MT 800-735-4489 . Casper,WY 888-235-0515 J1~;; 1,~y.1"<,,:Gnlen~!WX 8QB-68B-7175 • Rapid,City, SD 888-672-1225 • College Station, TX 888-690-2218 ANAL VTICAL SUMMARY REPORT August 02, 2011 Denison Mines USA Corp 6425 S Hwy 191 Blanding, UT 84511 Workorder No.: C11070577 Project Name: Seeps and Springs 2011 Quote ID: C1640 -POC Wells Energy Laboratories, Inc. Casper WY received the following 6 samples for Denison Mines USA Corp on 7/15/2011 for analysis. Sample 10 Client Sample 10 Collect Date Receive Date Matrix Test C11070577-001 Entrance Seep 07/13/11 8:15 07/15/11 Aqueous Metals by ICP/lCPMS, Dissolved Alkalinity QA Calculations Chloride Fluoride Nitrogen, Ammonia Nitrogen, Nitrate + Nitrite pH Gross Alpha minus Rn222 and Uranium Solids, Total Dissolved Sulfate SW8260B VOCs, Standard List C11070577-002 Back Spring 07/13/11 11 :20 07/15/11 Aqueous Same As Above C1 ,1070577-003 Cottonwood Spring 07/13/11 10:20 07/15/11 Aqueous Same As Above C11070577-004 Ruin Spring 07/13/11 11 :20 07/15/11 Aqueous Same As Above C11070577-005 Trip Blank 6092 07/13/110:00 07/15/11 Aqueous SW8260B VOCs, Standard List C11070577-006 Temp Blank 07/13/11 0:00 07/15/11 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. All samples are reported on an as received basis unless otherwise indicated. Samples corrected for dry weight indicate units that have -dry appended. If you have any questions regarding these test results, please call. Report Approved By : c3¥~ D tJcJ.~ Reporting Supervisor Digitally signed by Stephanie Waldrop Date: 2011.08.02 18:31 :13 -06:00 Page 1 of 30 ~~TI'"':;,..-;----,;-:-----.------------------ 'Hehina,MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 l'IWW.energylab.com An.lytJcal £Xcsl/snc. Slnc. IgSl Ii ;" ,f ~ , Gillette, WY 866-&86-7175 • Rapid City, SO 888-672-1225 • College Station, TX 888-690-2218 CLIENT: Denison Mines USA Corp Project: Seeps and Springs 2011 Report Date: 08/02/11 Sample Delivery Group: C11070577 CASE NARRATIVE ORIGINAL SAMPLE SUBMITTAL(S) All original sample submittals have been returned with the data package. SAMPLE TEMPERATURE COMPLIANCE: 4°C (±2OC) 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 th is analytical service. For additional information and services visit our web page www.energylab.com. Page 2 of 30 www.energylab.com AnalytlcJ/1 (xCll/sncs Slncs /951 f!T -. -----.-- I I ....' 'H,elena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 8B8-235-0515 .. . @Ie~e, WYJ~6-6B6-7175 • Rapid City, SO 888-672-1225 • College Station, TX 888-690-2218 EN:RGY LAB O RATORIES LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Seeps and Springs 2011 Lab 10: C11070577-001 Client Sample 10: Entrance Seep 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 7 299 96.6 64 0.58 28.4 0.32 0.5 2.9 68.6 171 8.17 582 NO NO NO NO NO NO 55 NO 84 NO NO NO 5.5 NO NO NO 15.3 NO NO 1.6 0.7 0.8 Units mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L S.u. mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L pCi/L pCi/L pCi/L MDC -Minimum detectable concentration Report Date: 08/02/11 Collection Date: 07/13/11 08:15 DateReceived: 07/15/11 Matrix: Aqueous MCL! Qualifier Rl QCl Method Analysis Date 1 By 0 A2320 B 07/19/1121 :19/jba A2320 B 07/19/11 21 :191 jba 0.5 E200.7 07/26/11 16:42 1 cp A4500-CI B 07/28/11 10:021 we 0.10 A4500,F C 07/18/11 16:531 jba 0.5 E200.7 07/26/11 16:421 cp 0.05 A4500-NH3 G 07/28/11 12:26 1 de 0.1 E353.2 07/21/11 16:29/1jl 0.5 E200.7 07/26/11 16:421 cp 0.5 E200.7 07/26/11 16:421 cp 5 A4500-S04 E 07/26/11 16:09 /1jl 0.01 A4500-H B 07/18/11 15:33 lime 10 A2540 C 07/19/11 17:06/1mc 5.0 E200.8 07/29/11 01 :27 1 sml 0.50 E200.8 07/29/11 01 :27 1 sml 0.50 E200.8 07/29/11 01 :27 1 sml 25 E200.8 07/29/11 01 :27 1 sml 10 E200.8 07/29/11 01 :27 1 sml 10 E200.8 07/29/11 01 :27 1 sml 30 E200.7 07/26/11 16:421 cp 1.0 E200.8 07/29/11 01 :27 1 sml 10 E200.8 07/29/11 01 :27 1 sml 0.50 E200.8 07/29/11 01 :27 1 sml 10 E200.8 07/29/11 01 :27 1 sml 20 E200.8 07/29/11 01 :27 1 sml 5.0 E200.8 07/29/11 01 :27 1 sml 10 E200.8 07/29/11 01 :27 1 sml 0.50 E200.8 07/29/11 01 :27 1 sml 100 E200.8 07/29/11 01 :27 1 sml 0.30 E200.8 07/29/11 01 :27 1 sml 15 E200.8 07/29/11 01 :27 1 sml 10 E200.8 07/29/11 01 :27 1 sml E900.1 07/22/11 01 :30 1 ep E900.1 07/22/11 01 :30 1 ep E900.1 07/22/11 01 :30 1 ep MCL -Maximum contaminant level. NO -Not detected at the reporting limit. o -RL increased due to sample matrix. Page 3 of 30 www.energylab.com Analytical £Xcsl/Bnes SInes 1952 . Heiena, Mt 877-472-~711 • BII"ngs,MT 800-735-4489 • Casper, WY 888-235-0515 .,IliJ:~~. 'IA _,~~'iJiett~,.wY ~66-\;86"7i75 • Rapid City, So 888-672-1225 • College Station, TX 888-690-2218 EN:RGY LABORA"T OHIES LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp Seeps and Springs 2011 Cll070577-001 Client Sample 10: Entrance Seep Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result -1.52 10.5 10.2 608 0.960 ND ND ND ND ND ND ND ND ND ND 94.0 98.0 94.0 91.0 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 80-120 80-120 Report Date: 08/02/11 Collection Date: 07/13/11 08 :15 DateReceived: 07/15/11 Matrix: Aqueous MCL! QCl Method Analysis Date I By Calculation 07/28/11 15:441 kbh Calculation 07128/11 15:441 kbh Calculation 07128/11 15:44 1 kbh Calculation 07/28/11 15:44 1 kbh Calculation 07/28/11 15:44 1 kbh SW8260B 07/20/11 14:56 1 jlr SW8260B 07/20/11 14:56 1 jlr SW8260B 07/20/11 14:56 1 jlr SW8260B 07/20/11 14:56 1 jlr SW8260B 07/20/11 14:56 1 jlr SW8260B 07/20/11 14:561 jlr SW8260B 07/20/11 14:56 1 jlr SW8260B 07/20/11 14:56 1 jlr SW8260B 07/20/11 14:56 1 jlr SW8260B 07/20/11 14:56 1 jlr SW8260B 07/20/11 14:56 1 jlr SW8260B 07/20/11 14:56 1 jlr SW8260B 07/20/11 14:56 1 jlr SW8260B 07/20/11 14:56 1 jlr MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 4 of 30 EN:RGY LABORArOr~IES -----rm~ www.energylab.com Analytical Excsl/sncs Slncs /952 -Hei~n;: MT 877-472-0711 • aillings, MT 800-735-4489 • Casper, WY 888-235-0515 .. GiII~tf~l wy866-686-7115 • Rapid City, SD888-672-1225 • College Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Seeps and Springs 2011 LablD: C11070577-003 Client Sample ID: Cottonwood Spring 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 6 316 94.2 134 0.38 25.2 ND ND 5.9 227 389 8.04 978 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 8.68 ND ND -0.1 0.4 0.8 Units mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L S.u. mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L pC ilL pCi/L pCi/L MDC -Minimum detectable concentration U -Not detected at minimum detectable concentration Report Date: 08/02/11 Collection Date: 07/13/1110:20 DateReceived: 07/15/11 Matrix: Aqueous MCL! Qualifier RL QCL Method Analysis Date 1 By D U A2320 B 07/19/11 21 :361 jba A2320 B 07/19/11 21 :361 jba 0.5 E200.7 07/26/11 16:50 1 cp A4500-CI B 07/28/1110:10/wc 0.10 A4500-F C 07/18/1117:001 jba 0.5 E200.7 07/26/11 16:501 cp 0.05 A4500-NH3 G 07/28/11 12:30 1 de 0.1 E353.2 07/21/11 16:39/1jl 0.5 E200.7 07/26/11 16:50 1 cp 0.5 E200.7 07/26/11 16:501 cp 10 A4500-S04 E 07/26/11 16:1911jl 0.01 A4500-H B 07/18/11 15:39 lime 10 A2540 C 07/19/11 17:08 lime 5.0 E200.8 07/29/11 01 :36 1 sml 0.50 E200.8 07/29/11 01 :361 sml 0.50 E200.8 07/29/11 01 :361 sml 25 E200.8 07/29/11 01 :36 1 sml 10 E200.8 07/29/11 01 :36 1 sml 10 E200.8 07/29/11 01 :36 1 sml 30 E200.7 07/26/11 16:50 1 cp 1.0 E200.8 07/29/11 01 :36 1 sml 10 E200.8 07/29/11 01 :36 1 sml 0.50 E200.8 07/29/11 01 :36 1 sml 10 E200.8 07/29/11 01 :36 1 sml 20 E200.8 07/29/11 01 :36 1 sml 5.0 E200.8 07/29/11 01 :36 1 sml 10 E200.8 07/29/11 01 :36 1 sml 0.50 E200.8 07/29/11 01 :36 1 sml 100 E200.8 07/29/11 01 :36 1 sml 0.30 E200.8 07/29/11 01 :36 1 sml 15 E200.8 07/29/11 01 :36 1 sml 10 E200.8 07/29/11 01 :36 1 sml E900.1 07/22/11 01 :30 1 ep E900.1 07/22/11 01 :30 1 ep E900.1 07/22/11 01 :30 1 ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 7 of 30 ------~l· www.energylab.com DW ··Helena.MT·B77-472-0711 -Billings, MT BOO-735-4489 · Casper, WY 888-235-0515 ~~ Anslyt/cslExcsllsncBSlncB 1m j~~t', Gjllette, WY 866-686-7175 . Rapid City, SO 888-672-1225 . College Station, 1)( 888-690-2218. EN:RGY LABORATORIES LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp Seeps and Springs 2011 C11070577-003 Client Sample 10: Cottonwood Spring Analyses OAT A QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. Result -1.42 17.3 16.8 1070 0.910 ND ND ND ND ND ND ND ND ND ND 108 98.0 107 86.0 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 80-120 80-120 Report Date: 08/02/11 Collection Date: 07/13/11 10:20 DateReceived: 07/15/11 Matrix: Aqueous MClI QCl Method Analysis Date 1 By Calculation 07/28/11 15:45 1 kbh Calculation 07128/11 15:45 1 kbh Calculation 07128/11 15:451 kbh Calculation 07/28/11 15:451 kbh Calculation 07/28/11 15:451 kbh SW8260B 07/19/11 23:051 jlr SW8260B 07/19/11 23:051 jlr SW8260B 07/19/11 23:051 jlr SW8260B 07/19/11 23:051 jlr SW8260B 07/19/11 23:05 1 jlr SW8260B 07/19/11 23:05 1 jlr SW8260B 07/19/11 23:05 1 jlr SW8260B 07/19/11 23:051 jlr SW8260B 07/19/11 23:051 jlr SW8260B 07/19/11 23:05 1 jlr SW8260B 07/1 9/11 23:051 jlr SW8260B 07/19/11 23:05 1 jlr SW8260B 07/19/11 23:051 jlr SW8260B 07/19/11 23:051 jlr MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 8 of 30 EN:RGY L ABORATORIES www.energylab.com Analytical Exesllsnes Sines /952 ~,,,.;,~ ~{,7:";, -, -;-.-. -H-el-en-~,-M-:-T-:-87-7-.-4-7-2--0-71-1-.-Billin-gs-, M-r-aOD-7-35--440-9-. -ca-sp-;;;:Wv-8-a-8--23-5--05-15 1~: .. '':r.,Gillette, WY86S·686-7175 • Rapid City, SO 888-672-1225 • College Station, TX 888-690-2218 ==================------------------~~~~ LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Seeps and Springs 2011 LablD: C11070577-002 Client Sample 10: Back Spring 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 2 236 147 27 0.49 30.9 ND 1.7 3.3 108 483 8.10 911 ND ND ND NO ND ND ND ND ND ND 17 NO 9.7 ND NO NO 8.28 ND ND -0.1 0.4 0.8 Units mg/l mg/l mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L S.u. mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L pCi/L pCi/L pCi/L MDC -Minimum detectable concentration U -Not detected at minimum detectable concentration Report Date: 08/02/11 Collection Date: 07/13/11 11 :20 DateReceived: 07/15/11 Matrix: Aqueous MCL! Qualifier Rl QCl Method Analysis Date I By D U A2320 B 07/19/11 21 :28 1 jba A2320 B 07/19/11 21 :28 I jba 0.5 E200.7 07/26/11 16:46 1 cp A4500-CI B 07/28/11 10:07/wc 0.10 A4500-F C 07/18/11 16:57 1 jba 0.5 E200.7 07/26/11 16:461 cp 0.05 A4500-NH3 G 07/28/11 12:28 1 dc 0.1 E353.2 07/21/11 16:361 Ijl 0.5 E200.7 07/26/11 16:46 1 cp 0.5 E200.7 07/26/11 16:461 cp 10 A4500-S04 E 07/26/11 16:1 511jl 0.01 A4500-H B 07/18/1115:3611mc 10 A2540 C 07/19/11 17:07 1 Imc 5.0 E200.8 07/29/11 01 :32 1 sml 0.50 E200.8 07/29/11 01 :32 1 sml 0.50 E200.8 07/29/11 01 :32 1 sml 25 E200.8 07/29/11 01 :32 I sml 10 E200.8 07/29/11 01 :32 1 sml 10 E200.8 07/29/11 01 :32 I sml 30 E200.7 07/26/11 16:46 I cp 1.0 E200.8 07/29/11 01 :32 1 sml 10 E200.8 07/29/11 01 :32 1 sml 0.50 E200.8 07/29/11 01 :32 1 sml 10 E200.8 07/29/11 01 :32 I sml 20 E200.8 07/29/11 01 :32 I sml 5.0 E200.8 07/29/11 01 :32 1 sml 10 E200.8 07/29/11 01 :32 1 sml 0.50 E200.8 07/29/11 01 :32 1 sml 100 E200.8 07/29/11 01 :32 1 sml 0.30 E200.8 07/29/11 01 :32 1 sml 15 E200.8 07/29/11 01 :32 1 sml 10 E200.8 07/29/11 01 :32 I sml E900.1 07/22/11 01 :30 1 ep E900.1 07/22/11 01 :30 1 ep E900.1 07/22/11 01 :30 I ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 5 of 30 EN:RGY LABORAfORIES www.energylab.com ~.··Helena.MT677o·472-0711 .BillingS.MT 800-735-4489 • Casper, WY 888-235-0515 Anslyt/cslExcBIIBncBSlncB 1952 J.,2' > 'LGiliette, WY 866-686-7175 . Rapid City, SD 888-672-1225 . College Station, IX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab ID: Denison Mines USA Corp Seeps and Springs 2011 C11070577-002 Client Sample ID: Back Spring Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result -0.685 14.9 14.7 944 0.970 NO NO NO NO NO NO NO NO NO NO 99.0 99.0 95.0 94.0 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 80-120 80-120 Report Date: 08/02/11 Collection Date: 07/13/11 11 :20 DateReceived: 07/15/11 Matrix: Aqueous MCL! QCL Method Analysis Date 1 By Calculation 07/28/11 15:45 1 kbh Calculation 07128/11 15:45 1 kbh Calculation 07128/11 15:45 1 kbh Calculation 07/28/11 15:45 1 kbh Calculation 07/28/11 15:45 1 kbh SW8260B 07/20/11 17:21 1 jlr SW8260B 07/20/11 17:21 1 jlr SW8260B 07/20/11 17:21 1 jlr SW8260B 07/20/11 17:21 1 ilr SW8260B 07/20/11 17:21 1 ilr SW8260B 07/20/11 17:21 1 ilr SW8260B 07/20/11 17:21 1 ilr SW8260B 07/20/11 17:21 1 ilr SW8260B 07/20/11 17:21 1 jlr SW8260B 07/20/11 17:21 1 ilr SW8260B 07/20/11 17:21 1 ilr SW8260B 07/20/11 17:21 1 ilr SW8260B 07/20/11 17:21 1 ilr SW8260B 07/20/11 17:21 1 ilr MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 6 of 30 ---------_._---------------- EN:RGY LABOI~AI O RIES www.energylab.com Analytical Excsllsncs Sincs 1952 Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 .Gillette, VlY ,86S'686-7175 • Rapid City, SD 888-612-1225 • College Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Seeps and Springs 2011 Lab 10: Cll070577-004 Client Sample 10: Ruin Spring 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 239 148 44 0.50 31 .1 ND 1.6 3.3 111 484 8.14 905 ND ND ND ND ND ND ND ND ND ND 17 ND 10.2 ND ND ND 8.63 ND ND -0.05 0.5 0.8 Units mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L S.u. mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L \1g/L iLg/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: 08/02/11 Collection Date: 07/13/11 11 :20 DateReceived: 07/15/11 Matrix: Aqueous MCL! Qualifier RL QCL Method Analysis Date I By D U A2320 B 07/19/11 21 :441 jba A2320 B 07/19/11 21 :44 1 jba 0.5 E200.7 07/26/11 17:02 1 cp A4500-CI B 07/28/11 10:151 wc 0.10 A4500-F C 07/18/11 17:07 I jba 0.5 E200.7 07/26/11 17:02 1 cp 0.05 A4500-NH3 G 07/28/11 12:321 dc 0.1 E353.2 07/21 /11 16:41 /1jl 0.5 E200.7 07/26/11 17:02 1 cp 0.5 E200.7 07/26/11 17:021 cp 10 A4500-S04 E 07/26/11 16:22 /1jl 0.01 A4500-H B 07/18/11 15:42 11mc 10 A2540 C 07/19/11 17:09 /1mc 5.0 E200.8 07/29/11 01:41 I sml 0.50 E200.8 07/29/11 01 :41 I sml 0.50 E200.8 07/29/11 01 :41 I sml 25 E200.8 07/29/11 01 :41 I sml 10 E200.8 07/29/11 01 :41 I sml 10 E200.8 07/29/11 01 :41 I sml 30 E200.7 07/26/11 17:021 cp 1.0 E200.8 07/29/11 01:41 I sml 10 E200.8 07/29/11 01 :41 I sml 0.50 E200.8 07/29/11 01:41 I sml 10 E200.8 07/29/11 01:41 I sml 20 E200.8 07/29/11 01 :41 I sml 5.0 E200.8 07/29/11 01 :41 I sml 10 E200.8 07/29/1 1 01 :41 I sml 0.50 E200.8 07/29/11 01 :41 I sml 100 E200.8 07/29/11 01 :41 I sml 0.30 E200.8 07/29/11 01 :41 I sml 15 E200.8 07/29/1 1 01 :41 I sml 10 E200.8 07/29/11 01 :41 I sml E900.1 07/22/11 01 :30 I ep E900.1 07/22/11 01 :30 I ep E900.1 07/22/11 01 :30 I ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 9 of 30 EN:RGY LABORATORIES ---·----(iit1)· www.energylab.com ~--l-·-.·;Helk~a.MT 877-472-0711 • Billings, MT BOO-735-448Q.;'Casper, WY BBB-235-0515 ~ An'/ytlc,'ExcsllsncsSlnc, 19S2 j~;~ ,' .. G~lett~, WY'B66~6B6-7175 • Rapid City, SOBBB-672-1225 • College Station, TX 8BB-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab ID: Denison Mines USA Corp Seeps and Springs 2011 Cll070577-004 Client Sample ID: Ruin Spring Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: Rl -Analyte reporting limit. QCL -Quality control limit. Result -1 .90 15.4 14.9 966 0.940 ND ND ND ND ND ND ND ND ND ND 109 98.0 107 86.0 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 80-120 80-120 Report Date: 08/02/11 Collection Date: 07/13/11 11 :20 DateReceived: 07/15/11 Matrix: Aqueous MCL! QCl Method Analysis Date 1 By Calculation 07/28/11 15:45 1 kbh Calculation 07128/11 15:45 / kbh Calculation 07128/11 15:45 / kbh Calculation 07/28/11 15:45 / kbh Calculation 07/28/11 15:45 / kbh SW8260B 07/19/11 23:391 ilr SW8260B 07/19/11 23:39 1 ilr SW8260B 07/19/11 23:391 ilr SW8260B 07/19/11 23:39 1 ilr SW8260B 07/19/11 23:39 1 ilr SW8260B 07/19/11 23:39 1 ilr SW8260B 07/19/11 23:39 1 ilr SW8260B 07/19/11 23:39 1 ilr SW8260B 07/19/11 23:391 ilr SW8260B 07/19/11 23:39 1 ilr SW8260B 07/19/11 23:391 ilr SW8260B 07/19/11 23:39 1 ilr SW8260B 07/19/11 23:39 1 ilr SW8260B 07/19/11 23:39 1 ilr MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 10 of 30 ~)l'· www.energylab.com ~ \ ,Helena, MT 877-472-~711 ~ Billings, MT 800--735:4489 • Casper, WY 888-235-0515 :-t,~ AnalytlcalExcBllBncsSlncB 1952 )~(rl~j~i;;~(:hjl,I~t!~ wY 86610686-7175 'w Rapid City, SO 888-672-1225 • College Station, 1X 888-690-2218 EN:RGY LABor..;z:A10RIES ================~---------------= LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp Seeps and Springs 2011 C 11070577 -005 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: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-dB Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result NO NO NO NO NO NO NO NO NO NO 10B 97.0 102 B7.0 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 Qualifier 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: 08/02/11 Collection Date: 07/13/11 DateReceived: 07/15/11 Matrix: Aqueous MCL! QCL Method Analysis Date 1 By SWB260B 07/20/11 00:141 ilr SWB260B 07/20/11 00:141 ilr SWB260B 07/20/11 00:141 ilr SWB260B 07/20/11 00 :141 ilr SWB260B 07/20/11 00:141 ilr SWB260B 07/20/11 00 :141 ilr SWB260B 07/20/11 00 :141 ilr SWB260B 07/20/11 00 :14 1 ilr SWB260B 07/20111 00:14 1 ilr SWB260B 07/20/11 00 :141 ilr SWB260B 07/20/11 00:14 1 ilr SWB260B 07/20/1 1 00 :14 1 ilr SWB260B 07/20/1100:14/ilr SWB260B 07/20/11 00:14 1 ilr MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 11 of 30 EN:RGY LABORA-' ORIES www.energylab.com f Analytical Excsllsncs Sines 1952 ; .' Heiena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 uJlillett~, Wv 866~686-7175 • Rapid City, SD.88B-672-1225 • College Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp Seeps and Springs 2011 C 11070577 -006 Client Sample 10: Temp Blank Analyses Result Units PHYSICAL PROPERTIES Temperature Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. 3.4 Qualifier Rl Report Date: 08/02/11 Collection Date: 07/13/11 DateReceived: 07/15/11 Matrix: Aqueous MCL! QCl Method Analysis Date / By E170.1 07/15/11 09:15 / kbh Mel -Maximum contaminant level. ND -Not detected at the reporting limit. Page 12 of 30 -_.=== EI\ERGY LABORATORIES www.energylab.com An,lytlc,' Excellence SlncB 19S2 ,,' : ,Hel~na, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-23~-0515 .' Gillette, WY 866-686-7175 • Rapid City, so 888-672-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Seeps and Springs 2011 Analyte Method: A2320 B Sample 10: MBLK Alkalinity, Total as CaC03 Carbonate as C03 Bicarbonate as HC03 Count Result 3 Method Blank 2.11 ND 2.58 Units mg/L mg/L mg/L Sample 10: LCS Laboratory Control Sample Alkalinity, Total as CaC03 216 mg/L Sample 10: C11070502-001AOUP 3 Sample Duplicate Alkalinity, Total as CaC03 98.6 mg/L Carbonate as C03 ND mg/L Bicarbonate as HC03 120 mg/L Sample 10: C11070502-001AMS Sample Matrix Spike Alkalinity, Total as CaC03 228 mg/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration RL 5.0 1.0 1.0 5.0 5.0 5.0 5.0 5.0 Report Date: 08/02/11 Work Order: Cll070577 %REC Low Limit High Limit RPO RPOLimit Qual Batch: R148310 Run: MANTECH_11 0719A 07/19/11 07:42 Run: MANTECH_110719A 07/19/11 07:57 107 90 110 Run: MANTECH_110719A 07/19/11 08:58 0.8 10 10 0.8 10 Run: MANTECH_110719A 07/1 9/11 09 :07 103 80 120 ND -Not detected at the reporting limit. Page 13 of 30 EN:RGY LABORATORIES www,energylab,~om (1j-(' ,: ;j. , . ',' 'H;j~na, MT 877-472-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 M,lyt/caIExcs/lsncsS/nc.'9S2 J~i ,,' Gillette, WY 86,6-686-7175 • Rapid City, SO 888-672-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Seeps and Springs 2011 Analyte Count Result Method: A2540 C Sample 10: MBLK1_ Solids, Total Dissolved TDS@ 180 C Method Blank NO Units mg/L Sample 10: LCS1_ Laboratory Control Sample Solids, Total Dissolved TDS@ 180 C 1000 mg/L Sample 10: C11070501-005AMS Sample Matrix Spike Solids, Total Dissolved TDS @ 180 C 5870 mg/L Sample 10: C11070556·001AOUP Sample Duplicate Solids, Total Dissolved TDS @ 180 C 196 mg/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Report Date: Work Order: RL %REC Low Limit High Limit RPO Run: BAL-1_110719A 4 Run: BAL-1_110719A 10 100 90 110 Run: BAL-1 110719A 13 104 90 110 Run: BAL-1 110719A 10 2.2 ND -Not detected at the reporting limit. 08/02/11 C11070577 RPOLimit Qual Batch: R148376 07/19/11 17:04 07/19/11 17:04 07/20/11 09:18 07/19/11 17:05 10 Page 14 of 30 www.energylab.com ~, 'J", 'Heiena,MT 817-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 An.fytlcalExcsllsncsSlncs 1952 J..:~'~; ,:' '~:Gillette! Wy 866-686-7175 • Rapid City, SD 888-672-1225 • College Station, TJ( 888-690-2218 EN:RGY LAB ORATORIES Client: Denison Mines USA Corp Project: Seeps and Springs 2011 QA/QC Summary Report Prepared by Casper, WY Branch Report Date: 08102/11 Work Order: C11070577 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: A4500-CI B Sample 10: MBLK9-7/28/2011 Chloride Sample 10: C11 070733-001 B Chloride Sample 10: C11070733-001B Chloride Sample 10: LCS35-7/28/2011 Chloride Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank NO mg/L Sample Matrix Spike 614 mg/L Sample Matrix Spike Duplicate 614 mg/L Laboratory Control Sample 3600 mg/L Batch: 7/28/2011-CL-TIR-W Run : TITRATION_11 0728A 07/28/11 09:33 0.5 Run: TITRATION_11 0728A 07/28/11 10:48 1.0 104 90 110 Run: TITRATION_11 0728A 07/28/11 10:51 1,0 104 90 110 0,0 10 Run: TITRATION_11 0728A 07/28/11 10:55 1.0 102 90 110 NO -Not detected at the reporting limit. Page 15 of 30 EI\ERGY --------1OOJ www.energylab.com , "( )., '."Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 j -1. .,' . LABORATORIES Analytical Excellence Slncs 1952 ,,,,d. 'l\;,.dill~tt~; w.y 86&-~B6-7175 • Rapid City, SO .B88-672-1225 • College Station, TX 888-690-2218 Client: Denison Mines USA Corp Project: Seeps and Springs 2011 QA/QC Summary Report Prepared by Casper, WY Branch Report Date: Work Order: Analyte Count Result Units RL %REC Low Limit High Limit RPO Method: A4500-F C Sample 10: MBLK Fluoride Sample 10: LCS Fluoride Sample 10: C11070579-004AMS Fluoride Sample 10: C11070579-004AMSO Fluoride Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mg/L Laboratory Control Sample 2.00 mg/L Sample Matrix Spike 3.05 mg/L Sample Matrix Spike Duplicate 3.11 mg/L Run: MANTECH_11 0718A 0.05 Run: MANTECH_110718A 0.10 100 90 110 Run: MANTECH_11 0718A 0.10 95 80 120 Run: MANTECH 110718A - 0.10 98 80 120 1,9 ND -Not detected at the reporting limit. 08/02/11 Cll070577 RPOLimit Qual Batch: R148234 07/18/11 11 :59 07/18/11 12:01 07/18/11 17:36 07/18/11 17:44 10 Page 16 of 30 ------=== ---------------------------www.energylab.com EN:RGY LABORATORIES ~ ~ M./ytlcBI ExcBllBncB SlncB 1952 .'\ J '. Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 ~ti~' J' GiI.le!,t~, WY 866-&86-7175 • Rapid City, SO 888-672-1225 • College Station, TX 888-690-2218 Client: Denison Mines USA Corp Project: Seeps and Springs 2011 QA/QC Summary Report Prepared by Casper, WY Branch Report Date: 08/02/11 Work Order: Cll070577 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: A4S00-H B Sample 10: ICV1_110718_2 pH Method: A4S00-H B Sample 10: C11070SS0-00SAOUP pH Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Initial Calibration Verification Standard 6.89 S.u. 0.010 100 Sample Duplicate 7.89 s.U. 0.010 98 Analytical Run : ORION555A_110718B 07118111 13:24 102 Run: ORION555A_110718B 07/18/11 14:31 3 1.8 ND -Not detected at the reporting limit. Page 17 of 30 EN:RGY www.energylab.com Helen.a, MT 877-472-0711 -Billings, MT 800-735-4489 -Casper, WY 888-235-0515 .. Gillette" WY 86&~&86-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-690-2218 LAB ORATORIES An.lytlc.' !xeal/sncs Sines /952 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 08/02/11 Project: Seeps and Springs 2011 Work Order: C11070577 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: A4500-NH3 G Batch: R148657 Sample 10: MBLK-1 Method Blank Run: TECHNICON_11 0728A 07/28/11 12:18 Nitrogen, Ammonia as N ND mg/L 0.02 Sample 10: LCS-2 Laboratory Control Sample Run: TECHNICON_11 0728A 07/28/11 12:20 Nitrogen, Ammonia as N 1.97 mg/L 0.050 99 90 110 Sample 10: LFB-3 Laboratory Fortified Blank Run: TECHNICON_11 0728A 07/28/11 12:22 Nitrogen, Ammonia as N 1.85 mg/L 0.050 94 80 120 Sample 10: C11070599-0050MS Sample Matrix Spike Run : TECHNICON_11 0728A 07/28/11 12:44 Nitrogen, Ammonia as N 1.86 mg/L 0.050 95 80 120 Sample 10: C11070599-0050MSO Sample Matrix Spike Duplicate Run: TECHNICON_11 0728A 07/28/11 12:46 Nitrogen, Ammonia as N 1.85 mg/L 0.050 94 80 120 0.5 10 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 18 of 30 EN:RGY LABORAIORIES www.energylab.com (' An,lytle,1 Excsllsnes Sines 1952 J_ 'Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Gasper, WY 888-235-0515 • )lflletie, WY 866~686-7175 • Rapid City, SO 888-672-1225 • College Station, TX 888-690-2218 Client: Denison Mines USA Corp Project: Seeps and Springs 2011 QA/QC Summary Report Prepared by Casper, WY Branch Report Date: 08/02/11 Work Order: Cll070577 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: A4500-S04 E Sample 10: MBLK-1_110726 Sulfate Sample 10: LCS-1_110726 Sulfate Sample 10: C11070577-004AMS Sulfate Sample 10: C11070577-004AMSO Sulfate Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mg/L Laboratory Control Sample 5100 mg/L Sample Matrix Spike 824 mg/L "Sample Matrix Spike Duplicate 824 mg/L Batch: 11 0726_1_S04-TURB-W Run : TURB-2_11 0726A 07/26/11 15:36 0.8 Run: TURB-2_110726A 07/26/11 15:39 100 106 90 110 Run: TURB-2 110726A 07/26/11 16:55 - 17 106 90 110 Run: TURB-2_110726A 07/26/11 16:57 17 106 90 110 0.0 10 ND -Not detected at the reporting limit. Page 19 of 30 EN:RGY LABORATORIES ---·------te.fj · www.energylab.com ~t·~f; .. --·Helena.MTB77-472-0711 .BillingS.MT 800-735-4489 • Casper, WY 888-235-0515 ~~ AnalytlcBIExcsllsncsSlncs 1952 j-'-L,~if. 'Gillette, WY 8QG,G86-7175 • Rapid City, s~ 888-672"1225 • College Station, TX 888-690-2218 Client: Denison Mines USA Corp Project: Seeps and Springs 2011 OA/oe Summary Report Prepared by Casper, WY Branch Report Date: 08/02/11 Work Order: C11070577 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: E200.7 Sample 10: MB-110726A 5 Method Blank Calcium NO mg/L Iron NO mg/L Magnesium NO mg/L Potassium NO mg/L Sodium ND mg/L Sample 10: LFB-110726A 5 Laboratory Fortified Blank Calcium 48.5 mg/L Iron 0.966 mg/L Magnesium 48.5 mg/L Potassium 44.6 mg/L Sodium 49.3 mg/L Sample 10: C11070577-003BMS2 5 Sample Matrix Spike Calcium 185 mg/L Iron 1.91 mg/L Magnesium 120 mg/L Potassium 95.3 mg/L Sodium 318 mg/L Sample 10: C11070577-003BMSO 5 Sample Matrix Spike Duplicate Calcium 189 mg/L Iron 1.93 mg/L Magnesium 122 mg/L Potassium 94.6 mg/L Sodium 325 mg/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration 0.1 0.001 0.05 0.05 0.2 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 97 97 97 89 99 89 93 93 88 89 93 94 95 87 96 Run: ICP2-C_11 0726A Run: ICP2-C_11 0726A 85 115 85 115 85 115 85 115 85 115 Run: ICP2-C 110726A 70 130 70 130 70 130 70 130 70 130 Run: ICP2-C_11 0726A 70 130 70 130 70 130 70 130 70 130 ND -Not detected at the reporting limit. 1.9 1.0 1.7 0.7 2.1 Batch: R148552 07/26/11 14:28 07/26/11 14:32 07/26/11 16:54 07/26/11 16 :58 20 20 20 20 20 Page 20 of 30 EN:RGY www.energylab.com , ' Helena, MT 8770472-0711 -Billings, MT 800-735-4489 -Casper, WY 888-235-0515 LABORATORIES I" Gilfett~, WY 86&-686-7175 -Rapid City, SD 888-672-1225 -College Station, TX 888-690-2218 ~-"", ... Li .. '.",,-' •• -,. . Anslytlcal Excsllsncs Sincs 1952 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Seeps and Springs 2011 Analyte Count Result Units Method: E200.8 Sample 10: C11070573-005BMS4 Arsenic Beryllium Cadmium Chromium Cobalt Copper Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc Sample 10: C11070573-005BMSO Arsenic Beryllium Cadmium Chromium Cobalt Copper Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc Sample 10: LRB Arsenic Beryllium Cadmium Chromium Cobalt Qualifiers: RL -Analyte reporting limit. 18 Sample Matrix Spike 0.0518 mg/L 0.0445 mg/L 0.0483 0.0497 0.0484 0.0936 0.0493 0.0504 0.00502 2.89 mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L 0.0496 mg/L 0.212 mg/L 0.0172 mg/L 0.0486 mg/L 0.0488 mg/L 2.03 mg/L 0.0534 mg/L 0.0804 mg/L 18 Sample Matrix Spike Duplicate 0.0561 mg/L 0.0448 mg/L 0.0498 mg/L 0.0485 mg/L 0.0488 mg/L 0.0934 mg/L 0.0504 mg/L 0.0507 mg/L 0.00532 mg/L 3.00 mg/L 0.0505 mg/L 0.198 mg/L 0.0184 mg/L 0.0494 mg/L 0.0500 mg/L 2.10 mg/L 0.0529 mg/L 0.0826 18 Method Blank NO NO NO NO NO mg/L mg/L mg/L mg/L mg/L mg/L NO -Not detected at the reporting limit. S -Spike recovery outside of advisory limits. Report Date: 08/02/11 Work Order: C11070577 RL %REC Low Limit High Limit RPO RPOLImit Qual 0.0010 0.010 0.010 0.0010 0.010 0.010 0.0010 0.010 0.0010 0.10 0.0010 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 0.0010 0.010 0.0010 0.10 0.0010 0.0010 0.010 0.0010 0.0010 0.00030 0.0010 0.010 0.0050 0.00050 0.00050 0.020 0.010 102 89 93 98 95 90 98 96 100 96 88 86 97 98 101 98 110 90 96 96 96 90 100 97 106 98 59 92 99 100 100 103 Run: ICPMS4-C_110728A 70 130 70 130 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 Run: ICPMS4-C_11 0728A 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: ICPMS4-C_11 0728A 8.0 0.6 3.1 2.4 0.8 0.2 2.2 0.6 5.8 3.7 1.7 7.0 7.1 1.6 2.4 3.1 0.9 2.7 Batch: R148677A 07/29/11 01 :12 A A 07/29/11 01 :17 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 A S A 07/28/11 19:31 A -The analyte level was greater than four times the spike level. In accordance with the method % recovery is not calculated. MOC -Minimum detectable concentration Page 21 of 30 EN:RGY LABORATORIES www:energylab.com An,lytlcal Excsl/.nc. Sinc. 1952 \ I Helena, MT 877-472-0711 • Billings, MTBDD-735-4489 • Casper, WV 888-235-0515 ".G.illeUe, IVv ,866-686-7175 • Rapid City, 5D888-672-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 08/02/11 Project: Seeps and Springs 2011 Work Order: Cll070577 ----. Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: E200.8 Batch: R148677A Sample 10: LRB 18 Method Blank Run: ICPMS4-C_ll 0728A 07/28/11 19:31 Copper NO mg/L 0.010 Lead NO mg/L 0.0010 Manganese NO mg/L 0.010 Mercury 3.69E-05 mg/L 0.00050 Molybdenum NO mg/L 0.010 Nickel NO mg/L 0.020 Selenium NO mg/L 0.0050 Silver NO mg/L 0.010 Thallium NO mg/L 0.00050 Tin NO mg/L 0.10 Uranium NO mg/L 0.00030 Vanadium NO mg/L 0.020 Zinc 0.000445 mg/L 0.010 Sample 10: LFB 18 Laboratory Fortified Blank Run: ICPMS4-C_ll0728A 07/28/11 19:36 Arsenic 0.0533 mg/L 0.0010 107 85 115 Beryllium 0.0540 mg/L 0.0010 108 85 115 Cadmium 0.0528 mg/L 0.0010 106 85 115 Chromium 0.0538 mg/L 0.0010 108 85 115 Cobalt 0.0526 mg/L 0.0010 105 85 115 Copper 0.0542 mg/L 0.0010 108 85 115 Lead 0.0523 mg/L 0.0010 105 85 115 Manganese 0.0524 mg/L 0.0010 105 85 115 Mercury 0.00529 mg/L 0.0010 105 85 115 Molybdenum 0.0519 mg/L 0.0010 104 85 115 Nickel 0.0547 mg/L 0.0010 109 85 115 Selenium 0.0557 mg/L 0.0010 111 85 115 Silver 0.0204 mg/L 0.0010 102 85 115 Thallium 0.0530 mg/L 0.0010 106 85 115 Tin 0.0518 mg/L 0.0010 104 85 115 Uranium 0.0528 mg/L 0.00030 106 85 115 Vanadium 0.0535 mg/L 0.0010 107 85 115 Zinc 0.0571 mg/L 0.0010 113 85 115 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MOC -Minimum detectable concentration Page 22 of 30 ._---== EN:RGY www.energylab.com '. " ,;~elilna,MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Analytical Exesllenc, Since 1952 .:L:L" ~ I t ~~ie!te"WY ,866-686-717,5 .. Rapid City, SO 888-672-1225 • College Station, TX 888-690-2218 LABORATORIES Client: Denison Mines USA Corp Project: Seeps and Springs 2011 QA/QC Summary Report Prepared by Casper, WY Branch Report Date: 08/02/11 Work Order: Cll070577 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: E353.2 Sample 10: MBLK-l Nitrogen, Nitrate+Nitrite as N Sample 10: LCS-2 Nitrogen, Nitrate+Nitrite as N Sample 10: LFB-3 Nitrogen, Nitrate+Nitrite as N Sample 10: Cll070577-0010MS Nitrogen, Nitrate+Nitrite as N Sample 10: Cll070577-001DMSO Nitrogen, Nitrate+Nitrite as N Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank NO mg/L Laboratory Control Sample 2.64 mg/L Laboratory Fortified Blank 2,08 mg/L Sample Matrix Spike 2,55 mg/L Sample Matrix Spike Duplicate 2.61 mg/L Batch: R148399 Run: TECHNICON_ll 0721A 07/21 III 14:26 0.06 Run: TECHNICON_ll0721A 07/21/11 14:29 0,10 106 90 110 Run: TECHNICON_ll 0721 A 07/21 /1 1 14:31 0.10 106 90 110 Run: TECHNICON_ll 0721A 07/21 /1 1 16:31 0.10 106 90 110 Run: TECHNICON_l10721A 07/21/11 16:34 0,10 109 90 110 2,3 10 NO -Not detected at the reporting limit. Page 23 of 30 www.energylab.com AnalytIcal Excel/encB Since 1952 EN:RGY LABORATORIES (: ... ,', ,'\) .J? ~~ '" ~.' J . H~lena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Jll!~J!e, WV866-686-7175 • RapidClty, SD 888-672-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 08/02/11 Project: Seeps and Springs 2011 Work Order: C11070577 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: E900.1 Batch: GA-0457 Sample 10: MB-GA-04S7 3 Method Blank Run: G542M_11 0720C 07/21 /11 23:54 Gross Alpha minus Rn & U -0.05 pCilL U Gross Alpha minus Rn & U Precision (±) 0.5 pCi/L Gross Alpha minus Rn & U MOC 0.8 pC ilL Sample 10: LCS-GA-04S7 Laboratory Control Sample Run: G542M_110720C 07121/11 23:54 Gross Alpha minus Rn & U 22.7 pCi/L 108 70 130 Sample 10: C11070555-001GMS Sample Matrix Spike Run: G542M 110720C 07/21/11 23:54 - Gross Alpha minus Rn & U 51.5 pCi/L 102 70 130 Sample 10: C11070555-001GMSO Sample Matrix Spike Duplicate Run: G542M -110720C 07/22/11 01 :30 Gross Alpha minus Rn & U 47.9 pCilL 94 70 130 7.3 27.5 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MDC -Minimum detectable concentration U -Not detected at minimum detectable concentration Page 24 of 30 --------~~l· www.energylab.com rf-:;" ',: Heiena, MTB77-472-0711 • aillings, MT 800-735-4489 • Casper, WY 888-235-0515 ~~ An.lytlcBIExcBIIBncBSlncB 1952 J~:': .. ' '~'Giilette, Wy 8~6-&86-7175 • Rapid CitY,SD 888-&72-1225 • College Station, TJ( 888-690-2218 EI\ERGY LABORATORIES QA/QC Summary Report Prepared by Casper, WY Branch Client: . Denison Mines USA Corp Report Date: 08102/11 Project: Seeps and Springs 2011 Work Order: Cll070577 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: SW8260B Batch: R148299 Sample 10: 19-Jul-11_LCS_ 4 16 Laboratory Control Sample Run: GCMS2_11 071 9B 07/19/11 13:12 Acetone 96 ug/L 20 96 70 130 Benzene 8.3 ug/L 1.0 83 70 130 Carbon tetrachloride 9.7 ug/L 1.0 97 70 130 Chloroform 8.8 ug/L 1.0 88 70 130 Chloromethane 7.6 ug/L 1.0 76 70 130 m+p-Xylenes 17 ug/L 1.0 87 70 130 Methyl ethyl ketone 76 ug/L 20 76 70 130 Methylene chloride 8.4 ug/L 1.0 84 70 130 Naphthalene 8.2 ug/L 1.0 79 70 130 o-Xylene 8.7 ug/L 1.0 87 70 130 Toluene 8.4 ug/L 1.0 84 70 130 Xylenes, Total 26 ug/L 1.0 87 70 130 Surr: 1,2-0ichlorobenzene-d4 1.0 96 80 120 Surr: Oibromofluoromethane 1.0 86 70 130 Surr: p-Bromofluorobenzene 1.0 95 80 130 Surr: Toluene-d8 1.0 85 80 120 Sample 10: 19-Jul-11_MBLK_6 16 Method Blank Run: GCMS2_11 071 9B 07/19/11 14:22 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: l,2-0ichlorobenzene-d4 1.0 103 80 120 Surr: Oibromofluoromethane 1.0 84 70 130 Surr: p-Bromofluorobenzene 1.0 102 80 120 Surr: Toluene-d8 1.0 86 80 120 Sample 10: C11070557-001HMS 16 Sample Matrix Spike Run: GCMS2_11 071 9B 07/19/11 20:10 Acetone 1100 ug/L 100 114 70 130 Benzene 89 ug/L 5.0 89 70 130 Carbon tetrachloride 110 ug/L 5.0 109 70 130 Chloroform 190 ug/L 5.0 108 70 130 Chloromethane 78 ug/L 5.0 78 70 130 m+p-Xylenes 180 ug/L 5.0 91 70 130 Methyl ethyl ketone 920 ug/L 100 92 70 130 Methylene chloride 97 ug/L 5.0 97 70 130 Naphthalene 66 ug/L 5.0 66 70 130 S Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MOC -Minimum detectable concentration S -Spike recovery outside of advisory limits. Page 25 of 30 EN:RGY LABORATORIES ·------~AN www.energylab.com ~1..··H·elena.MT877.472·0711 .BillingS.MT 800·735·4489 . Casper, ivY 888·235·0515 ~ An,Iyt/c./Excs/lsnc8SincB '952 J~~li Gillette WY 866 686 7175 • Rapid City, SO 888·672·1225 • College Station, TX 888·690·2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 08102/11 Project: Seeps and Springs 2011 Work Order: C11070577 -------- Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLImit Qual Method: SW8260B Batch: R 148299 Sample 10: C11070557·001HMS 16 Sample Matrix Spike Run : GCMS2_11 0719B 07/19/11 20:10 o-Xylene 92 ug/L 5.0 92 70 130 Toluene 91 ug/L 5.0 91 70 130 Xylenes, Total 270 ug/L 5.0 91 70 130 Surr: 1,2-0ichlorobenzene-d4 1.0 97 80 120 Surr: Oibromofluoromethane 1.0 94 70 130 Surr: p-Bromofluorobenzene 1.0 96 80 120 Surr: Toluene-d8 1.0 87 80 120 Sample 10: C11070557·001HMSO 16 Sample Matrix Spike Duplicate Run: GCMS2_110719B 07/19/11 20:45 Acetone 1200 ug/L 100 118 70 130 3.1 20 Benzene 87 ug/L 5,0 87 70 130 1.8 20 Carbon tetrachloride 110 ug/L 5,0 110 70 130 0.7 20 Chloroform 190 ug/L 5.0 106 70 130 0.8 20 Chloromethane 86 ug/L 5.0 86 70 130 9.2 20 m+p-Xylenes 180 ug/L 5.0 89 70 130 2.2 20 Methyl ethyl ketone 960 ug/L 100 96 70 130 4.2 20 Methylene chloride 97 ug/L 5.0 97 70 130 0.4 20 Naphthalene 79 ug/L 5.0 79 70 130 19 20 o-Xylene 89 ug/L 5.0 89 70 130 3,5 20 Toluene 89 ug/L 5,0 89 70 130 1.8 20 Xylenes, Total 270 ug/L 5,0 89 70 130 2.7 20 Surr: 1,2-Dichlorobenzene-d4 1,0 100 80 120 0.0 10 Surr: Dibromofluoromethane 1,0 95 70 130 0.0 10 Surr: p-Bromofluorobenzene 1.0 94 80 120 0.0 10 Surr: Toluene-d8 1.0 85 80 120 0.0 10 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 26 of 30 www.energylab.com Analytical Excsl/sncs Sincs 1952 EN:RGY LABORATORIES " Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WV 888-235-0515 ~iii~tre, y/Y,86G-686-7115 • Rapid CitY,SQ 888-672-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Seeps and Springs 2011 Analyte Count Result Units Method: SW8260B Sample 10: 072011_LCS_4 16 Laboratory Control Sample Acetone 110 ug/L Benzene 9.6 ug/L Carbon tetrachloride 10 ug/L Chloroform 9.7 ug/L Chloromethane 8.8 ug/L m+p-Xylenes 20 ug/L Methyl ethyl ketone 110 ug/L Methylene chloride 10 ug/L Naphthalene 10 ug/L o-Xylene 10 ug/L Toluene 9.6 ug/L Xylenes, Total 30 ug/L Surr: 1,2-0ichlorobenzene-d4 Surr: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Sample 10: 072011_MBLK_6 16 Method Blank Acetone NO ug/L Benzene NO ug/L Carbon tetrachloride NO ug/L Chloroform NO ug/L Chloromethane NO ug/L m+p-Xylenes NO ug/L Methyl ethyl ketone NO ug/L Methylene chloride NO ug/L Naphthalene NO ug/L o-Xylene NO ug/L Toluene NO ug/L Xylenes, Total NO ug/L Surr: 1,2-0ichlorobenzene-d4 Surr: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Sample 10: C11070577·002EMS 16 Sample Matrix Spike Acetone 2000 ug/L Benzene 200 ug/L Carbon tetrachloride 210 ug/L Chloroform 200 ug/L Chloromethane 180 ug/L m+p-Xylenes 440 ug/L Methyl ethyl ketone 2100 ug/L Methylene chloride 210 ug/L Naphthalene 190 ug/L Qualifiers: RL -Analyte reporting limit. MOC -Minimum detectable concentration RL %REC 20 105 1.0 96 1.0 100 1.0 97 1.0 88 1.0 101 20 108 1.0 102 1.0 104 1.0 102 1.0 96 1.0 102 1.0 99 1.0 98 1.0 100 1.0 91 20 1.0 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 1.0 1.0 97 1.0 94 1.0 97 1.0 93 200 102 10 100 10 103 10 101 10 89 10 109 200 104 10 107 10 94 Report Date: 08/02/11 Work Order: C11070577 Low Limit High Limit RPO RPOLimit Qual Batch: R148389 Run: SATURNCA 110720B 07/20/11 11 :55 - 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 80 120 70 130 80 130 80 120 Run: SATURNCA_110720B 07/20/11 13:08 80 120 70 130 80 120 80 120 Run: SATURNCA_110720B 07/20/11 19:10 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 NO -Not detected at the reporting limit. Page 27 of 30 EN:RGY LABORATORIES www.energylab.com An.lytlcal £Xc,II,nc, SIne, /952 Helena, MT 8n-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 86&-686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 08/02/11 Project: Seeps and Springs 2011 Work Order: C11070577 ----------- Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: SW8260B Batch: R14B3B9 Sample 10: C11070577-002EMS 16 Sample Matrix Spike Run: SATURNCA_110720B 07/20/11 19:10 o-Xylene 200 ug/L 10 100 70 130 Toluene 200 ug/L 10 99 70 130 Xylenes, Total 640 ug/L 10 106 70 130 Surr: 1,2-Dichlorobenzene-d4 1.0 96 BO 120 Surr: Dibromofluoromethane 1.0 96 70 130 Surr: p-Bromofluorobenzene 1.0 9B BO 120 Surr: Toluene-dB 1.0 96 BO 120 Sample 10: C11070577-002EMSO 16 Sample Matrix Spike Duplicate Run: SATURNCA_110720B 07/20/11 19:46 Acetone 2000 ug/L 200 99 70 130 2.B 20 Benzene 190 ug/L 10 97 70 130 2.B 20 Carbon tetrachloride 200 ug/L 10 100 70 130 2.B 20 Chloroform 200 ug/L 10 99 70 130 2.0 20 Chloromethane 170 ug/L 10 B3 70 130 7.4 20 m+p-Xylenes 420 ug/L 10 106 70 130 3.4 20 Methyl ethyl ketone 2100 ug/L 200 103 70 130 O.B 20 Methylene chloride 210 ug/L 10 104 70 130 2.3 20 Naphthalene 1BO ug/L 10 92 70 130 1.7 20 o-Xylene 200 ug/L 10 102 70 130 2.4 20 Toluene 190 ug/L 10 96 70 130 2.9 20 Xylenes, Total 630 ug/L 10 105 70 130 1.5 20 Surr: 1,2-Dichlorobenzene-d4 1.0 93 BO 120 0.0 10 Surr: Dibromofluoromethane 1.0 92 70 130 0.0 10 Surr: p-Bromofluorobenzene 1.0 9B BO 120 0.0 10 Surr: Toluene-dB 1.0 95 BO 120 0.0 10 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 28 of 30 'EN;RGY LASORAI or~IES www.energylab.com A/IIIlytlcal Exes/lsoelSlne. 1952 :fielena, MT 877-472-0711 • Billings, MT 800-135-4489 . Casper, WY 888-235-0515 "Gillatte,ViY,866-~86'.:7175 • Rapid City, SO 888-672-1225 • Collage Station, TX 888-690-2218 Workorder Receipt Checklist Denison Mines USA Corp 111111111111111111111111111111111111111111111111111111I C11070577 Login completed by: Edith McPike Reviewed by: BL2000\sdobos Reviewed Date: 7/20/2011 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 heads pace? Water -pH acceptable upon receipt? Contact and Corrective Action Comments: Yes 0' Yes 0' Yes 0 Yes 0' Yes 0' Yes 0' Yes 0' Yes 0' Yes 0' Yes 0' 3,4'C On Ice Yes 0' Yes 0' Date Received: 7/15/2011 Received by: dw Carrier FedEx name: No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 No 0 Not Present 0 Not Present 0 Not Present 0' No VOA vials submitted 0 Not Applicable 0 Page 29 of 30 Chain of Custody and Analytical Request Record Page~ofL CO~Name: _' I ~.g;tV' ~u1\l M I':'~ Report Mail Address: C f i? r:,eN)G [SfJ{ 1~).dYlJ,~c, fAI 8'LJS/I Invoice AddreS6':-l .Sa~ Special Report/Formats: Dow D EOO/EOT(Electronic Data) o POTWIWWTP Format:, ___ _ o State: D LEVEL IV o Other:----D NELAC SAMPLE IDENTIFICATION (Name, Location, Interval, etc.) Collection Date Collection Time PLEASE PRINT (Provide as much information as possibltl pr.oject Name, PWS, Permit, Etc. I Sample Origin S~.~ $ ~L1.~c' 2tJ/1 State: l.A-'1 EPNState Compliance: Yes ~ No 0 Contact jl.jame:-~, -Phone/Fax: ~19t~ Pfl.1~ &7fr" ~Z z I Invoice Contact & Phone: .-S6tA<-<-. ~ o L. CI> VlO rn.J:::. ~a:l;gOI2 --> 0 >. ro ~&!1 'i1'@O@ m@QD~'U'@:@l ~oo~ ~~ 0>= ro Ol ~ u>ooc: ....... « 001--1:;2 'I' o·-Cii~.§ ~ --CI>16oQ -...::: ~ c.. 1'_ E~~~ '-J) ::l%<CI~D ~ zE >1 ~ S5 "i .... MATRIX ~ o ~ UJ t:. I "0 () § « e ~ t1l ~ E « ~ UJ "E UJ t1l (J) -g ~ Email: Sampler: (Please Print) K "l~ /J~/Wl ~~ Purchase Order: QlIbte/Botile Order: .. R u s H Contact ELI prior to RUSH sample submittal for charges and scheduling -See Instruction Page Comments: s,pedby: rdlr ~f/l Cooler lUIS): c-lieJr f Receipt Temp 3.'1-°c On Ice: ~N Custody Seal ~ On Bollio l.. w OnCooier U' N Intact ~ N Signature (;;) N Match 1 PAraVl.{(, ,>u/J j1iL5Llllnk{~_Jt --/;-J_ I XI _J I I I I II I J I _ L ____ .. ~ 2 ~~.v_ >tJLA~ I jl/;II~ I'J1/) IZ ~;Al lxl I I If I I I T I I I~ 1:~uf~::rf5l~~~ I{~~ I~~ I~IIIIIIIIII I m 1 II -~ I -,. -I' -r I I I I I I I I I I I~ 6 ·Tr-i~\u~t~OCt24) 71~Bl~~ 8 I 10 Custody Received by (print): DatelTime: I~ (OJ ~ I~ f:J lIJ' "if/ttS.?) I~ SignatUre: Record Received by (print): DatelTime: Signature: MUSTber-------------__________________ ~~~~~----~~~------~~------~ S. Ignaure: 19 ned Sample Disposal: Return to Client: Lab Disposal: 11 /t/f' In certain circumstances, samples submitted to Energy Laboratories, Inc. may be subcontracteld tclother certified laboratories in order to complete the analysis requested. This serves as notice of this possibility. All sub-contract data wil~ clearly notated on your analytical report. Visit our web site at www.energylab.com for additional information, downloadable fee schedule, forms, and links. May 2011 Analytical Data 463 West 3600 South Salt Lake City, UT 84115 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-Iabs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Jo Ann Tischler Denison Mines 1050 17th Street, # 950 Denver, CO 80265 TEL: (303) 389-4132 RE: Annual Seeps and Springs Dear Jo Ann Tischler: Lab Set ID: 1106074 American West Analytical Laboratories received 6 sample(s) on 6/3/2011 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 fi:ee 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, Ky Ie F X DigitallY signed by Kyle F. Gross I ON: cn=Kyle F. Gross, o=AWAL, ~~=AWAL, emall=kyle@awal- G labs. com, c=US r 0 S S--Daie~0{1.0~09 13:06:53 ·06'00' Approved by: '-__ --'Z;""'~ _______ __' Laboratory Director or designee Report Date: 6/8/2011 Page 1 of23 All anruyses applicable to the CWA, SPWA, and ReRA are performed in accordance to NELAC protocols. Pertinent sampling information is locateq on the attached COCo This report is provided for the exclusive use of the addressee. Privileges of subsequent llse of the name of this company -or any member of its staff, or reproduction oft~is report in connection with the adYertisement, promoti~n or sale of any product or process, or in connection wi.th ihe re~publication of this report for any purpose other than for the addressee ,,,ill 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 (0 the rules of the (rade and of science. American West ANALYTICAL LA BORATORIES 463 West 3600 South Salt Lake City, UT 8411S Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awaI@awaI-Iabs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Client: Project: Lab Set ID: Date Received: Lab Sample ID 1106074-001A 1106074-002A 1106074-003A 1106074-004A 1106074-00SA 1106074-006A SAMPLE SUMMARY Denison Mines Contact: Jo Ann Tischler Annual Seeps and Springs 1106074 6/3/2011 lOlSh Client Sample ID Date Collected Matrix Analysis Cottonwood S/3 1/2011 161Sh Aqueous VOA by GC/MS Method 8260C/S030C Westwater Seep S/31/2011 14S0h Aqueous VOA by GC/MS Method 8260C/S030C Ruin Spring S/3112011 113Sh Aqueous VOA by GC/MS Method 8260C/S030C Back Spring S/3112011 113Sh Aqueous VOA by GC/MS Method 8260C/S030C Entrance Seep S/3112011 09S0h Aqueous VOA by GC/MS Method 8260C/S030C Trip Blank S/3112011 Aqueous VOA by GC/MS Method 8260C/S030C Report Date: 6/8/2011 Page 2 of23 All anaJyses_ applicable to the CWA, SDWA. and RCRA are perfofry-ted in accordance to NELAC protocols. Pertinent samp'ling information is located on the attached COc. This r~port is provided for the exclusive use o[the addressee .. Privileges of subsequen~ use of the name of Ihis company or any member orits staff, or. reproduclion of Ihis report in cOllnection with the itd,'erlisement. promotion or sale of any product.or process. or in conneclion wilh the fe-publication of this r~pOrt 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. 463 West 3600 South Salt Lake City, UT 84115 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.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: Annual Seeps and Springs 1106074 6103/2011 5/3112011 Entact None SW-846 8260C/5030C Tetrahydrofuran General Set Comments: Tetrahydrofuran was not observed above reporting limits. Holding Time and Preservation Requirements: All samples were received in appropriate containers and properly preserved. The analysis and preparation of all samples were performed within the method holding times following the methods stated on the analytical reports. Analytical QC Requirements: All instrument calibration and calibration check requirements were met. All internal standard recoveries met method criterion. Batch QC Requirements: MB, LCS, MS, MSD, RPD, and Surrogates: Method Blanks (MBs): No target analytes were detected above reporting limits, indicating that the procedure was free from contamination. Laboratory Control Sample (LCSs): All LCS recoveries were within control limits, indicating that the preparation and analysis were in control. Matrix Spike I Matrix Spike Duplicate (MS/MSD): All percent recoveries and RPDs (Relative Percent Differences) were inside established limits, indicating no apparent matrix interferences. Surrogates: All surrogate recoveries were within established limits. Corrective Action: None required. Report Date: 6/8/2011 Page 3 of23 All analyses applicable to the CWA, SDWA. and RCRA are performed in accordance to NELAC. protocols. Pertinent sampling information is located on the attached coe. This report is provided for the excll!sive use of the addressee. Privileges of subsequent lise of the name of this compan)' or any member of its staff, or reproduction of this report in connection with the advertisement, promotion or s"nle of any product or process, or in connection with the"re-publication of tltis report for nny purpose other than for the addressee win be granted only on contact. This compnny accepts no responsibility except for the due perfonnance of inspect ron and/or analysis in good faith and according to the ruies of the trade and of science. ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines Annual Seeps and Springs 1106074-001A Client Sample ID: Cottonwood Collection Date: 5/3112011 1615h Received Date: 6/3/2011 Analytical Results Analyzed: 6/3/2011 1715h Units: cg/L 463 West 3600 South Dilution Factor: 1 Salt Lake City, UT 84115 Compound lO15h Contact: Jo Ann Tischler Method: SW8260C VOAs by GC/MS Method 8260C/5030C CAS Reporting Analytical Number Limit Result Qual ---------------------------------------------------------------- Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromotluoroben l:ene Surr: Dibromotluoromethane Surr: Toluene-d8 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 1.00 0 1.00 77-144 111 80-123 105 80-124 103 80-125 101 Report Date: 6/8/2011 Page 4 of 23 All anruyses applicable to (he CWA, SDWA. and RCRA are performed. in accordance to NELAC protocols. Pertinent sampling information is located on the attached CDC. This report is provided for the exclusi\'e use of the addressee. Pri.vileges of subsequent use otthe.name of this company or any member ofits·slaff, 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 (or 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 of the trade and of science", ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines Annual Seeps and Springs 1106074-002A Client Sample ID: Westwater Seep Collection Date: 5/3112011 1450h Received Date: 6/3/2011 Analytical Results Analyzed: 6/3/2011 1946h Units: cg/L 463 West 3600 South Dilution Factor: 1 Salt Lake City, UT 84115 Compound 1015h Contact: Jo Ann Tischler Method: SW8260C VOAs by GC/MS Method 8260CIS030C CAS Reporting Analytical Number Limit Result Qual -------------------------------------------------------- Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluoroben C€ne Surr: Dibromofluoromethane Surr: Toluene-d8 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 1.00 0 1.00 77-144 111 80-123 104 80-124 103 80-125 100 Report Date: 6/8/2011 Page 5 of23 All analyses applicable to the CWA, SDWA,. and RCRA are performed in accordance to NELAC pn;>tocoIs. Pertinent sampling information is located on Ih~ attached COCo This report is provided for the exclusi\'.e use of the addressee. Privileges of subsequent use orthe name of this company or any. member of its staff, or reproduction of this.report fn 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" ORGANIC ANALYTICAL REPORT American West ANALYTICAL LABORATORIES Client: Project: Lab Sample ID: Denison Mines Annual Seeps and Springs 1106074-003A Client Sample ID: Ruin Spring Collection Date: 5/3112011 1135h Received Date: 6/3/2011 Analytical Results Analyzed: 6/3/2011 2005h Units: c:g/L 1015h 463 West 3600 South Dilution Factor: 1 Salt Lake City, UT 84115 Compound Contact: Jo Ann Tischler Method: SW8260C VOAs by GC/MS Method 8260CIS030C CAS Reporting Analytical Number Limit Result Qual ---------------------------------------------------------------- Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (80l) 263-8687 e-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Tetrah ydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-BromofluorobenE:ene Surr: Dibromofluoromethane Surr: Toluene-d8 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 1.00 0 1.00 77-144 111 80-123 105 80-124 103 80-125 101 Report Date: 6/8/2011 Page 6 of 23 All anruyses applic,able to the CWA, SDWA. and RCRA are performed in ,accordance to NELAC protocols. Pertinent sampling information is located on the attached COCo This report i~ provided for the exclusive use orthe addressee. Privil~ges of subsequent use orthe name of this company or any member of its staff, or reproduction of this report in connection with the.ad,'ertisement. promotion or sale of any product or prooess, or'in connection with the re-publication of this report foniny . purpose other thWl for the addressee ",ill be granted only on contact. This company accepts no responsibility except for the due j}erfonnance of inspection and/or analysis in good faith ·and according to the ruJes of the trade and of science. .. ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines Annual Seeps and Springs 1106074-004A Client Sample ID: Back Spring Collection Date: 5/31/2011 1135h Received Date: 6/3/2011 Analytical Results Analyzed: 6/3/2011 2024h Units: c::g/L 1015h 463 West 3600 South Dilution Factor: I Salt Lake City, UT 84115 Compound Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-Iabs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenl::ene 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 0 1.00 17060-07-0 77-144 112 460-00-4 80-123 104 1868-53-7 80-124 104 2037-26-5 80-125 101 Report Date: 6/8/2011 Page 7 of 23 All analyses applicable to the CWA, SDWA. an~ RCRA are performed in accordance to NELAC proto~ols. Pertinent sampling information is located on the at!ached coc. This report is provided for the exclusive lI~e of the addressee. Pn\'ileges of subsequent lise of the name of this company o~. an)' member of its staff, or -reproduction of this report j.~ connection with the advertisement, promotion or sale.~f any product or process, or in connection with the rew.l?ublication of this report for any purpose other than for the addressee will be granted only on contnct. 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. ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines Annual Seeps and Springs 1106074-005A Client Sample ID: Entrance Seep Collection Date: 5/3112011 0950h Received Date: 6/3/2011 lO15h Analytical Results Analyzed: 6/3/2011 2043h Units: c::g!L 463 West 3600 South Dilution Factor: 1 Salt Lake City, UT 84115 Compound Contact: 10 Ann Tischler Method: SW8260C VOAs by GC/MS Method 8260C/S030C CAS Reporting Analytical Number Limit Result Qual ---------------------------------------------------------------- Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-Iabs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director IoseRocha QA Officer Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-BromofluorobenCEne Surr: Dibromofluoromethane Surr: Toluene-d8 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 1.00 0 1.00 77-144 113 80-123 104 80-124 104 80-125 99.1 Report Date: 6/8/2011 Page 8 of 23 All analyses applicabl~ to the CWA, SDWA, and RCRA are performed in ac~ordance to NELAC protocols. Pertinent sampling infofrnation is located on the attached COCo This report is pf.ovided for the exclusive use of the addressee. Privilege~ of subsequent use oflh~ mime of this company or My member of its stafT,.ar reproduction of this report in connection with the adverti.sement •. promotion or sale of an)' product or process, or in connection with the fe-publication of this reportJor 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. .. ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines Annual Seeps and Springs 1106074-006A Client Sample ID: Trip Blank Collection Date: 5/3112011 Received Date: 6/3/2011 1015h Analytical Results Analyzed: 613/2011 2102h Units: cg!L 463 West 3600 South Dilution Factor: 1 Salt Lake City, UT 84115 Compound Contact: Jo Ann Tischler Method: SW8260C VOAs by GC/MS Method 8260C/5030C CAS Reporting Analytical Number Limit Result Qual ---------------------------------------------------------------- Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 e-mail: awal@awal-labs.com web: www.awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Tetrahydrofuran Surr: 1,2-Dichloroethane-d4 Surr: 4-Bromofluorobenl]:ne Surr: Dibromofluoromethane Surr: Toluene-d8 109-99-9 17060-07-0 460-00-4 1868-53-7 2037-26-5 1.00 0 1.00 77-144 112 80-123 105 80-124 102 80-125 99.7 Report Date: 6/8/2011 Page 9 of23 All analyses applicable to the CWA. SDWA. and R,CRA are perfomled in accordance to NELAC protocols._ Pertinent sampling information is located on the atlacryed COCo This report is provided for the exclusive use C?f the addressee. Privileges of . subsequent use of the name of this company or an)' 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--pub,licalion.ofthis report for any purpose other than for the addressee will be granted only on contact. This company accepts no responsibifity except for the due perfonnance of inspection and/or'analysis in good faith and according to the rules of the 'trade and of science, American West ANALYTICA L LABO RATORIES Client: Denison Mines Lab Set ID: 1106074 Project: Annual Seeps and Springs . Sample ID Analyte LCS VOC 060311B Tetrahydrofuran LCS VOC 060311B SUIT: 1,2-Dichloroethane-d4 LCS VOC 060311B SUIT: 4-Bromofluoroben[]:ne LCS VOC 06031lB SUIT: Dibromofluoromethane LCS VOC 060311B SUIT: Toluene-d8 463 West 3600 South Salt Lake City, UT 84115 Phone: (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: Jo Ann Tischler Dept: MSVOA QCType: LCS Amount Original Units Method Result Spiked Amount %REC Limits cg/L SW8260C 18.7 20.00 0 93.4 43-146 DREC SW8260C 53 .9 50.00 108 69-132 DREC SW8260C 49.1 50.00 98.2 85-118 DREC SW8260C 5l.3 50.00 103 80-120 DREC SW8260C 49.1 50.00 98.2 81-120 %RPD RPD Limit Kyle F. Gross Laboratory Director Jose Rocha QA Officer Qual Date Analyzed 6/3/2011 1619h 6/3/2011 1619h 6/3/2011 1619h 6/3/2011 1619h 6/3/2011 1619h Report Date: 6/8/2011 Page 10 of23 AlL analyses applicable to the CWA, SDWA. and RCRA are performed in accordance to NELAC protocols. Pertinent sampling information is located on the attached COC. This report is provided for the exclusive use 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 advertisement, promotion or sale of any product or process, or in connection with the fe-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. American West ANA LYTICAL LABORATORIES , Client: Denison Mines ,Lab Set ID: 1106074 Project: Annual Seeps and Springs Sample ID Analyte MB VOC 060311B Tetrahydrofuran MB VOC 060311B SUIT: 1,2-Dichloroethane-d4 MB VOC 060311B Surr: 4-Bromofluoroben Clne , MB VOC 060311B Surr: Dibromofluoromethane MB VOC 060311B Surr: Toluene-d8 463 West 3600 South Salt Lake City, UT 84115 Phone: (801) 263-8686, Toll Free: (888) 263-8686, Fax: (801) 263-8687 e-mail: awal@awal-labs.com, web: www.iiwal-labs.com Units cg/L OREC DREC DREC DREC QC SUMMARY REPORT Amount Method Result Spiked SW8260C 0 1.00 SW8260C 54.7 50.00 SW8260C 51.6 50.00 SW8260C 50.9 50.00 SW8260C 50.0 50.00 Contact: Dept: QCType: Original Jo Ann Tischler MSVOA l\1BLK Amount %REC Limits 109 69-132 103 85-118 102 80-120 99.9 81-120 %RPD RPD Limit Kyle F. Gross Laboratory Director Jose Rocha QA Officer Qual Date Analyzed 6/3/2011 1656h 6/3/2011 1656h 6/3/2011 1656h 6/3/2011 1656h 6/3/2011 1656h Report Date: 6/8/2011 Page 11 of 23 All analyses applicable to the CWA, SDWA, and ReRA 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 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 of the trade and of science. American West ANALYTICAL LABORATOR I ES Client: Denison Mines Lab Set ID: 1106074 Project: Annual Seeps and Springs Sample ID Analyte 1106074-001AMS Tetrahydrofuran 11 06074-00 lAMS SUIT: 1,2-Dichloroethane-d4 1 106074-00 lAMS SUIT: 4-Bromofluoroben~ne 11 06074-00 lAMS SUIT: Dibromofluoromethane 1106074-001AMS SUIT: Toluene-d8 463 West 3600 South Salt Lake City, UT 84115 Phone: (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 cg/L SW8260C 20.4 20.00 0 102 43-146 DREC SW8260C 56.2 50.00 112 77-144 DREC SW8260C 48.7 50.00 97.4 80-123 DREC SW8260C 52.8 50.00 106 80-1 24 DREC SW8260C 48.9 50.00 97.8 80-125 %RPD RPD Limit Kyle F. Gross Laboratory Director Jose Rocha QA Officer Qual Date Analyzed 6/3/2011 1908h 6/3/2011 1908h 6/3/2011 1908h 6/3/2011 1908h 6/3/2011 1908h Report Date: 6/812011 Page 12 of 23 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 re-publication of this report for any purpose other than for the addressee will be granted only on contact. This company accepts no responsibility except for the due perfonnance of inspection andlor analysis in good faith and according to the rules of the trade and of science. Client: Denison Mines , Lab Set ID: 1106074 Project: Annual Seeps and Springs Sample ID Analyte 1106074-001AMSD Tetrahydrofuran 1106074-001AMSD Surr: 1,2-Dichloroethane-d4 1106074-001AMSD SUIT: 4-Bromofluoroben[]:ne 1106074-001AMSD SUIT: Dibromofluoromethane 1106074-001AMSD SUIT: Toluene-d8 463 West 3600 South Salt Lake City, UT 84115 Phone: (801) 263-8686, Toll Free: (888) 263-8686, Fax: (801) 263-8687 e-mail: awal@awal-labs.com, web: www.awal-labs.com QC SUMMARY REPORT Contact: Dept: Jo Ann Tischler MSVOA QC Type: MSD Amount Original Units Method Result Spiked Amount %REC Limits cg/L SW8260C 20.4 20.00 0 102 43-146 DREC SW8260C 55.6 50.00 111 77-144 DREC SW8260C 49.2 50.00 98.5 80-123 DREC SW8260C 52.7 50.00 105 80-124 DREC SW8260C 48.7 50.00 97.3 80-125 %RPD 0.147 RPD Limit 25 Kyle F. Gross Laboratory Director Jose Rocha QA Officer Qual Date Analyzed 6/3/2011 1927h 6/3/2011 1927h 6/3/2011 1927h 6/3/2011 1927h 6/3/2011 1927h Report Date: 6/8/2011 Page 13 of23 All analyses applicable to the CWA, SDWA, and ReRA are perfonned 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, 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. . Quantitation Report (QT Reviewed) Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via C:\msdehem\1\DATA\JUN11-C\03JUN11A\ B84L0741.D 3 Jun 2011 5:15 pm 1l06074-001A SAMP 5.0ML 10F3 6 Sample Multiplier: 1 Jun 03 18:27:06 2011 C:\MSDCHEM\1\METHODS\AFULLW_33.M VOA Calibration Wed May 18 10:01:59 2011 Initial Calibration fl.bundance TIC: B84L0741.D\data.ms 1500000 1450000 1400000 1350000 1300000 1250000 1200000 1150000 1100000 1050000 1000000 950000 900000 850000 800000 750000 700000 650000 <11. 600000 1! <f} Jl! g " E Jl! e " g e '§ Q ~ E u e q ,Q N. 0 550000 500000 450000 ~ ~ <f} <f} 400000 350000 300000 250000 200000 150000 100000 50000 ~ o I I I I 7.50 8.00 8.50 lTIrrle--> ___ ..£QL2.503.0Q...~_4.00~~!5.00 5~.",50",---",6.",,0,,-0 6.50 7.00 AFULLW_33.M Fri Jun 03 18:59:36 2011 I . 9.00 9.50 10.00 10.50 11.00 11.50 Report Date: 6/8/2l5'fllgEp"age'1140f23 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\DATA\JUNII-C\03JUNIIA\ B92L0742.D 3 Jun 2011 7:46 pm 1l06074-002A SAMP 5.0ML 10F3 14 Sample Multiplier: 1 Quant Time : Jun 06 07:15:53 2011 Quant Method C:\MSDCHEM\1\METHODS\AFULLW_33.M Quant Title VOA Calibration QLast Update Wed May 18 10:01:59 2011 Response via Initial Cali bration (QT Reviewed) ~bundance~--TIC: B92L0742.D\data.ms 1500000 1400000 1300000 1200000 1100000 1000000 900000 800000 700000 (f) 600000 ~ J!! " E e g 500000 ~ e .0 is lS (f) 400000 300000 200000 ~ 0; -,;,'" "-c eB 100000 "-'" OU ~« o ~ AFULLW_33.M Mon Jun 06 07:31:41 2011 (f) g J!! " e :l1 g 0 "t <il 6.00 6.50 7.00 " (f) I 7.50 8.00 8.50 9.00 9.50 10.00 10.50 11 .00 11 .50 I Report Date: 6/8/2{YFlJGEp'fige'l150f23 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via fA-bundance 1400000 1350000 1300000 1250000 1200000 1150000 1100000 1050000 1000000 950000 900000 850000 800000 750000 700000 650000 600000 550000 500000 450000 400000 350000 300000 250000 Quantitation Report C:\msdehem\I\DATA\JUNII-C\03JUNIIA\ B93L0743.D 3 Jun 2011 8:05 pm 1106074-003A SAMP 5.0ML 10F3 15 Sample Multiplier: 1 Jun 06 07:16:17 2011 C:\MSDCHEM\I\METHODS\AFULLW_33.M VOA Calibration Wed May 18 10:01:59 2011 Initial Calibration (QT Reviewed) TIC: B93L0743.D\data.ms (f) 1f (f) '" ~ 1f E J'! e 1;) g ~ '5 E {3 e i3 ,Q N_ o => => (f) (f) AFULLW_33.M Mon Jun 06 07:31:54 2011 Report Date: 6/8/2l'1J3igEp"tlge±I6 of23 Data Path Data File Aeq On Operator Sampl e Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via lA.bundance i 1450000 1400000 1350000 1300000 1250000 1200000 1150000 1100000 1050000 1000000 950000 900000 850000 800000 750000 700000 650000 600000 550000 500000 450000 400000 350000 300000 250000 200000 150000 100000 I 50000 Quantitation Report C:\msdehe m\1\DATA\JUN11-C \03JUN11A\ B94L0744 .D 3 Jun 2011 8 :24 pm ll060 74-004A SAMP 5.0ML 10F3 16 Sample Multiplier: 1 Jun 06 07:16 :46 2011 C:\MSDCHEM\1\METHODS\AFULLW_33.M VOA Calibration Wed May 18 10:01:59 2011 Initial Calibration (QT Reviewe d) TIC : 894L0744.D\data.ms (/) g (/) J'1 oi '" :ii E e 1ii g e 15 0 :c E .<l e n ,Q N. n ~ " (/) (/) O'~~~~TTT[PrF[FA~~[TT~"[rrrn~~~~~nrrn~~"TT~rn~40~~ToI"rn,I"",T'",,nn,,~"T'rrrn~1 ~ ~ i I ime--> 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50.~..Jl.LMQ.-.LQQ....L~00_.§"'?~Q9--.JL~QQ.J 0.50 11"QQ,..!1.50 I AFULLW_33 .M Mon Jun 06 07:32 :05 2011 Report Date: 6/8/2ijJ3jgEp'uge'l17 of23 Quantitation Report Data Path Data File Aeq On Operator Sample Mise :,C:\msdehem\1\DATA\JUN11-C\03JUN11A\ B95L0745.D ALS Vial Quant Time: Quant Method Quant Ti tle QLast Update Response via 3 Jun 2011 8:43 pm 1106074-005A SAMP 5.0ML 10F3 17 Sample Multiplier: 1 Jun 06 07:17:21 2011 C:\MSDCHEM\1\METHODS\AFULLW_33.M VOA Calibration Wed May 18 10:01:59 2011 Initial Calibration (QT Reviewed) \A.bundance ! 1450000 TIC: 895L0745.D\data.ms 1400000 1350000 1300000 1250000 1200000 1150000 1100000 1050000 1000000 950000 900000 850000 800000 750000 700000 650000 600000 (/) 550000 g" j'! " 500000 E e 0 .E 450000 g e ,Q 400000 0 :s (/) 350000 300000 250000 200000 150000 100000 50000 ~ime--> 0 AFULLW_33.M Mon Jun 06 07:32:16 2011 Ul. " ~ 1;3 § 'l3 is ~. ts (/) (/) :!! " to! " .0 e g '§ E e aJ => (/) Report Date: 6/8/2{1FiH EYage'l18 of 23 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\DATA\JUNll-C\03JUNllA\ B96L0 746.D 3 Jun 2011 9:02 pm 1l06074-006A SAMP 5.0ML 10F3 18 Sample Multiplier: 1 Quant Time : Jun 06 07:17:44 2011 Quant Method C:\MSDCHEM\I\METHODS\AFULLW_33.M Quant Title VOA Calibration QLast Update Wed May 18 10:01:59 2011 Re sponse via Initial Calibration (QT Re viewed) AbUndance ! TIC: S96L0746.D\data.ms ! 1350000 1300000 1250000 1200000 1150000 1100000 1050000 1000000 950000 900000 850000 800000 750000 700000 650000 600000 550000 (fJ i (fJ 500000 j!! ~ Q; j!! E e Q; g e 0 450000 '5 :c E .2 0 e <it .0 400000 15 ~ " (fJ (fJ 350000 300000 250000 200000 150000 100000 50000 I 0 I I ~ I . [ime--> _. ____ .2.00 2.§Q.._..1:.lill..._ 3.50 4.00 4.50 5.00 5.50 __ 6.00_"§'§~,QL..L50 8.0Q~Q.....JLQQ~-,§Q _ 10.00.J.Q.50.J.1.00 1U O ! AFULLW_33.M Mon Jun 06 07:32:27 2011 Report Date: 6/S/2fj'filgEp"agt-41 00[23 Data Path Data File Aeq On Operator Sampl e Mi se AL S Vial Qu an tit ation Report C:\msdehe m\l \DATA\JUNl I -C\03JUNIIA\ B83LMBLK.D 3 J un 2011 4:56 pm MB VOC 060311B MBLK 5 . OML 5 Samp l e Multiplie r : 1 Quant Ti me: Jun 03 18 :26 :39 2011 Quant Method C:\MSDCHEM\I\METHODS\AFULLW_33.M Quant Titl e VOA Calibration QLast Updat e Wed May 18 10 :01:59 2011 Response vi a I nitial Calibration (QT Revi ewed) r bundance TIC: B83LMBLK.O\data.ms I 1500000 1450000 1400000 1350000 1300000 1250000 1200000 1150000 1100000 1050000 1000000 950000 900000 850000 800000 750000 700000 650000 600000 550000 500000 450000 400000 350000 300000 250000 200000 150000 100000 50000 (/) l' jg 1;) E E g '5 E E ,g 0 " (/) (/) l' jg 1;) E ~ .<.> 0 ~ " (/) .,; c Q) j E g u:: o ~ " (/) ~ime--> 0 I I I I 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 9.0~. __ 9.50 10.09 .. 1 0.50 11 .00 11 .50 AFULLW_33 .M Fri J un 03 19 :04 :24 2011 Report Date: 6/8/2ijI3HEp'ttg#20 of23 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via lA.bundance i 2800000 2700000 2600000 2500000 2400000 2300000 2200000 2100000 2000000 1900000 1800000 1700000 1600000 1500000 1400000 1300000 1200000 1100000 1000000 900000 800000 700000 600000 I Quantitation Report C:\msdehem\1\DATA\JUN11-C\03JUN11A\ 881LCS20.D 3 Jun 2011 4:19 pm LCS VOC 0603118 LCS SEE COVERSHEET FOR 10 AND AMOUNTS 3 Sample Multiplier: 1 Jun 03 16:35:43 2011 C:\MSDCHEM\1\METHODS\AFULLW_33.M VOA Calibration Wed May 18 10:01:59 2011 Initial Calibration (QT Reviewed) TIC: 881 LCS20:D\data.ms n-ime~::?~ __ 2"-QQ~_~~ 3.5L 4.09_ 4.50~,Q(L55tL~~~J...:Q9 __ 7.50 8.00_~ __ 1lJ)Jl~:_50 10.00 10.50 11.00 11.50 AFULLW_33.M Fri Jun 03 16:37:11 2011 Report Date: 6/8/2{}fIIgEp'tlge'l21of23 . Data Path Data File Aeq On Operator Samp l e Mise ALS Vial Quantitation Report C:\msdehem\1\DATA\JUN11-C\03JUNI1A\ B90S0741.D 3 Jun 2011 7:08 pm 1106074-001AMS MS 5.0ML 20F3 12 Sample Multiplier: 1 Quant Time: Jun 03 19:20:44 2011 Quant Method C:\MSDCHEM\I\METHODS\AFULLW_33.M Quant Title VOA Calibration QLast Update Wed May 18 10:01:59 2011 Re sponse via Initial Calibration (Not Reviewed) ~bundance TIC: 890S0741.D\data.ms 2000000 1900000 1800000 1700000 1600000 1S00000 1400000 1300000 1200000 1100000 1000000 900000 800000 700000 600000 SOOOOO 400000 300000 200000 100000 1! j'! 1i) E o E e '" "l. Q) ~ 1i) E I '" ~ime--> 0Ikn~2.'F00Fn=TF,L';=!-l='i"'i9"Wf'-lLl"'~"'W,.ll,-i/-,4.:.-+J~,.,J..¥--\l1rr+4,1Llf-~~M~~ -i-_ -,l--"7~.S:0~:'+-8.~00(...\ilj~8T.S'0 {L,,9"!'.0J.,-0#9'-.S"0--'--'1'0'.OrlO'1'O'.S'O,-n11'.0'0"1 "1.-.-rJ AFULLW_33 .M Mon Jun 06 07:31:19 2011 Report Date: 6/8/2ijfljg EVag&Q2 of 23 Da"ta 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\JUNII-C\03JUNIIA\ B91D0741.D 3 Jun 2011 7:27 pm 1l06074-001AMSD MSD 5.0ML 30F3 13 Sample Multiplier: 1 Jun 03 19:39:39 2011 C:\MSDCHEM\I\METHODS\AFULLW_33.M VOA Calibration Wed May 18 10:01:59 2011 Initial Calibration TIC: B91 00741. "' sg' I AFULLW_33.M Mon Jun 06 07:31:29 2011 (Not Reviewed) Report Date: 6/8/2ti'FIH EVage423 of 23 American West Analytical Laboratories WORK ORDER Summary Client: Client ID: Denison Mines DENIOO Contact: Jo Ann Tischler Project: Annual Seeps and Springs QC Level: LEVEL III Comments: No Hard Copies (UL). QC 3 & Summary. EDD-CSV. Report THF to 1 /lg/L.; SampleID Client Sample ID Collected Date Received Date Date Due 1106074-001A Cottonwood 5/3112011 4:15:00 PM 6/312011 10:15:00 AM 6/17/2011 1106074-002A Westwater Seep 5/31120112:50:00 PM 6/17/2011 1106074-003A Ruin Spring 5/3112011 11:35:00 AM 6/17/2011 1106074-004A Back Spring 6/17/2011 l106074-005A Entrance Seep 5/31/20119:50:00 AM 6/17/2011 1106074-006A Trip Blank 5/31/2011 6/17/2011 Work Order: 1106074 Page 1 of 1 6/6/2011 WOType: Project -J \ \ Matrix Test Code Sel Storage Aqueous 8260-W ~ VOCFridge 3 8260-W ~ VOCFridge 8260-W ~ VOCFridge 8260-W ~ VOCFridge 8260-W ~ VOCFridge 8260-W ~ VOCFridge ~ J J I Shee!! of 1 OENISO~"''''' MINES CHAIN OF CUSTODY //O(;O)y Samples Shipped to: American West Analytical Lab 463 West 3600 South Contact: Ryan Palmer or David Turk Ph: 435678 2221 Salt Lake City, Ut 84115 rpalmer@denisonmines.com dturk@denisonmines.com Chain of Custody/Sampling Analysis Request Project Annual Seeps and Sprin s Sample 10 Cottonwood Westwater Seep Ruin Spring Back Spring Entrance Seep Trip Blank Date Collected 5/31/2011 5/31/2011 5/31/2011 5/31/2011 5/31/2011 5/31/2011 Sam lers Name Ryan Palmer Time Collected Laboratory Analysis Requested 1615 THF 1450 THF 1135 THF 1135 THF 950 THF Please notify Ryan Palmer or Tanner Holliday of Reciept tempature on these samples Immediately! Thank IYou. Relinquished By:(Signature) .:)~'.NfH,4~ DatelTime Received By:(Signature) 6/2/2011 1200 DatelTime DatelTime Lab Set ID: / I aCe 0) Lj Samples Were: COC Tape Was: Container Type: No. Rec. ~ Shipped By: lA y1J Present on Outer Package ~ WAL Supplied Plastic b Hand Delivered %yes ONo ON/A o A WAi....Supplied Clear Glass o Ambient Unbroken on Outer package o A W AL S~ijed Amber Glass _\it Chilled )iYes ONo ON/A . o A WAL SUPPlied~~OC/TOX Vials Temperature ~.Lf °C Present on Sample o Amber 0 Clear 0 Hea iSRace 0 No Headspace Rec. Broken/Leaking DYes )QNo ON/A DYes ONo ZN/A o Non A W AL Supplied Con~r Notes: . Unbroken on Sample Notes: ~ DYes ONoJJN/A Properly Preserved ;td Yes ONo ON/A Notes: Notes: Rec. Within Hold ;fj Yes ONo Discrepancies Between Labels and COC DYes Notes: Notes: ------------ i"iffittk..Iype Preservative All pHs OK Ammonia -pH-<2.l:hS04 COD pH<2H2S0~ Cyanide Pli>12NaOH ~ Metals pH <2 HN03 .-----... N02 &N03 pH<2H2S04 ----Nutrients pH <2 H2SO4 ----r-. 0&0 pH<2HCL -....; r--..... Phenols pH <2 H2SO4 . -.............. Sulfide pH> 9NaOH, ZnAC ....... ............... TKN pH <2 H2SO4 ......... .......... TOC pH <2 H3P04 ~ TP04 jlH <2 H2SO4 ~ TPH pH <2HCL ~ "-"-. "- '" 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 . 1) 2) 3) 4) 5) If sample is not preserved properly list its extension and receiving pH in the appropriate column above Flag eoe and notify client for further instructions 6) 7) Place client conversation on eoe Samples may be adjusted at client request ft.No 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 Depot® or Staples®) or Authorized Shipping Outlet near you. Items sent via UPS Return SeNicesSM (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:llwww.ups.comJuis/create?ActionOriginPair=print_· _ .. Receipt&POPUP _LEVEL=l&P... 6~11 EI\ERGY LABORATORIES WIIW.energylab.com An.lytlc.1 ExcsllsnCl Sines' 952 ·Helena, MT 877-472-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 Gillette, WY 8Q6-686-7175 . Rapid City, SD 888-672-1225 . College Station, lJ( 888-690-2218 ANALYTICAL SUMMARY REPORT July 11 , 2011 Denison Mines USA Corp 6425 S Hwy 191 Blanding, UT 84511 WorkorderNo.: C11060151 Quote 10: C1640 -POC Wells Project Name: Annual Seeps and Springs 2011 Energy Laboratories, Inc. Casper WY received the following 7 samples for Denison Mines USA Corp on 6/3/2011 for analysis. Sample 10 Client Sample 10 Collect Date Receive Date Matrix Test C11060151-001 Cottonwood 05/31 /11 16:15 06/03/11 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 C11060151-002 West Water Seep 05/31 /11 14 :50 06/03/11 Aqueous Same As Above C11060151-003 Ruin Spring 05/31 /11 11 :35 06/03/11 Aqueous Same As Above C11060151-004 Back Spring 05/31/11 11 :35 06/03/11 Aqueous Same As Above C11060151-005 Entrance Seep 05/31/11 9:50 06/03/11 Aqueous Same As Above C11060151-006 Trip Blank 05/31/11 0:00 06/03/11 Aqueous SW8260B VOCs, Standard List C11060151-007 Temp Blank 05/31/11 0:00 06/03/11 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¥~ £; tJcJ.~ Reporting Supervisor Digitally signed by Stephanie Waldrop Date: 2011.07.1115:43:24 -06:00 Page 1 of 33 www.energylab.com Analytical Exes/IBneB SlneB /952 .Helena, MT 877472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 ·~illette, WY 866-686-7175 . Rapid City, SO 888-672-1225 . ColiegeStation, TX 888-690-2218 CLIENT: Denison Mines USA Corp Project: Annual Seeps and Springs 2011 Report Date: 07/11/11 Sample Delivery Group: C11060151 CASE NARRATIVE ORIGINAL SAMPLE SUBMITTAL(S) All original sample submittals have been returned with the data package. SAMPLE TEMPERATURE COMPLIANCE: 4°C (±2OC) 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. Maxi mum 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 33 EN:RGY LABORAI OHIES www.energylab.com Analytical £XcBI/Bncs Sincs 1952 Helena, MT 877-472-0111 • Billings, MT 800-135-4489 • Casper, WY 888-235-0515 .Gilfette, Wy 866-686-1175 • Rapid City, SD 888-612-1225 • College Station, lX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Annual Seeps and Springs 2011 Lab ID: C11060151-001 Client Sample ID: Cottonwood 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 MOe Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result ND 330 95.4 113 0.34 25.2 ND 0.1 6.0 229 394 7.55 1030 ND ND ND ND ND ND 53 ND ND ND ND ND ND ND ND ND 7.87 ND ND 0.1 0.2 0.3 Units mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L S.u. mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L pCi/L pC ilL pCi/L MOC -Minimum detectable concentration U -Not detected at minimum detectable concentration Report Date: 07/11/11 Collection Date: 05/31/11 16:15 DateReceived: 06/03/11 Matrix: Aqueous MCL! Qualifier RL QCL Method Analysis Date / By D U A2320 B 06/03/11 14:44 I jba A2320 B 06/03/11 14:44 I jba 0.5 E200.7 06/08/1 1 18 :00 I cp A4500-CI B 06/14/11 10:06 I wc 0.10 A4500-F C 06/07/11 13:44 I jba 0.5 E200.7 06/08/11 18:00 I cp 0.05 A4500-NH3 G 06/08/11 15 :58 I dc 0.1 E353.2 06/06/11 16:57 I dc 0.5 E200.7 06/08/11 18:00 I cp 0.5 E200.7 06/08/11 18 :00 I cp 10 A4500-S04 E 06/21 /11 16 :03 I Ijl 0.01 A4500-H B 06/03/11 14:36 I lmc 10 A2540 C 06/03/11 13:53 I lmc 5.0 E200.8 06/06/11 22:25 I sml 0.50 E200.8 07/11 /1111:17 /sml 0.50 E200.8 06/06/11 22 :25 I sml 25 E200.8 06/06/11 22:25 I sml 10 E200.8 06/06/11 22:25 I sml 10 E200.8 06/06/11 22:25 I sml 30 E200.7 06/08/11 18 :00 I cp 1.0 E200.8 06/06/11 22 :25 I sm I 10 E200.8 06/06/11 22:25 I sml 0.50 E200.8 06/06/11 22 :25 I sm I 10 E200.8 06/06/11 22 :25 I sm I 20 E200.8 06/06/11 22:25 I sml 5.0 E200.8 06/06/11 22 :25 I sml 10 E200.8 06/06/11 22:25 I sml 0.50 E200.8 06/06/11 22 :25 I sml 100 E200.8 06/06/11 22:25 I sml 0.30 E200.8 06/06/11 22:25 I sml 15 E200.8 06/06/11 22:25 I sml 10 E200.8 07/11/1111 :17 /sml E900.1 06/22/11 21 :58 I ep E900.1 06/22/11 21 :58 I ep E900.1 06/22/11 21 :58 I ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. o -RL increased due to sample matrix. Page 3 of 33 EN:RGY LABORAIOHIES www.energylab.com Analytical £XcBI/Bncs Slncs '952 Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 llille)te, WY866-686-7175 • Rapid City, SD 888-672-1225 . CoUege Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Annual Seeps and Springs 2011 Lab 10: C 11 0601 51-001 Client Sample 10: Cottonwood Analyses OAT A QUALITY NC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (O.SO -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-dS Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. Result 0.436 16.S 17.0 1050 0.9S0 ND ND ND ND ND ND ND ND ND ND 104 105 99.0 96.0 Report Date: 07111/11 Collection Date: 05/31/11 16:15 DateReceived: 06/03/11 Matrix: Aqueous MCL! Units Qualifier RL QCL Method Analysis Date 1 By % Calculation 06/22111 15 :OS 1 kbh meq/L Calculation 06122/11 15:0S I kbh meq/L Calculation 06122/11 15:0SI kbh mg/L Calculation 06/22/11 15:0SI kbh Calculation 06/22/11 15:0S I kbh ug/L 20 SWS260B 06/13/11 13:0S I jlr ug/L 1.0 SWS260B 06/13/11 13:0SI jlr ug/L 1.0 SWS260B 06/13/11 13:0S I jlr ug/L 1.0 SWS260B 06/13/11 13:0S I jlr ug/L 1.0 SWS260B 06/13/11 13:0SI jlr ug/L 20 SWS260B 06/13/11 13 :OS 1 jlr ug/L 1.0 SWS260B 06/13/11 13 :OS 1 jlr ug/L 1.0 SWS260B 06/13/11 13 :OS 1 jlr ug/L 1.0 SWS260B 06/13/11 13:0S I jlr ug/L 1.0 SWS260B 06/13/11 13 :OS 1 jlr %REC SO-120 SWS260B 06/13/11 13 :OS 1 jlr %REC 70-130 SWS260B 06/13/11 13:0S I jlr %REC SO-120 SWS260B 06/13/11 13:0S I jlr %REC SO-120 SWS260B 06/13/11 13:0SI jlr MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 4 of 33 \ EN:RGY LABOFlAT ORIES www.energylab.com Analytical Excellence Sincs '952 Helena, MT B77-472-0711 • Billings, MT 800-735-4489 • Casper, Wi 888-235-0515 £jillette, WY 866-686-7175 • Rapid City, SD 888-672-1225 . College Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Annual Seeps and Springs 2011 Lab 10: C11060151-002 Client Sample ID: West Water Seep 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 MOC Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result NO 371 247 21 0.54 34.7 0.06 ND 3.9 112 354 7.20 853 12.3 0.91 0.90 ND ND 16 4540 41.4 268 ND ND 29 NO NO ND ND 6.64 34 28 0.5 0.2 0.3 Units mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L s.u. mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L pCilL pCi/L pCi/L MOC -Minimum detectable concentration Report Date: 07/11/11 Collection Date: 05/31/11 14:50 DateReceived: 06/03/11 Matrix: Aqueous MCL! Qualifier RL QCL Method Analysis Date / By D A2320 B 06/03/11 14 :52 / jba A2320 B 06/03/11 14:52/ jba 0.5 E200.7 07/01/11 14:52/ cp A4500-CI B 06/14/11 10:07/wc 0.10 A4500-F C 06/07/11 13:47/ jba 0.5 E200.7 07/01/11 14:52 / cp 0.05 A4500-NH3 G 06/08/11 16 :00 / dc 0.1 E353.2 06/06/11 17:00 / dc 0.5 E200.7 07/01/11 14:52/ cp 0.5 E200.7 07/01/11 14:52/ cp 10 A4500-S04 E 06/21/11 16:08 / Ijl 0.01 A4500-H B 06/03/11 14:38 / Imc 10 A2540 C 06/03/11 13:53/ Imc 5.0 E200.8 06/06/11 22 :30/ sml 0.50 E200.8 06/09/11 17:52 / sml 0.50 E200.8 06/09/11 17:52/ sml 25 E200.8 06/06/11 22 :30/ sml 10 E200.8 06/09/11 17:52 / sml 10 E200.8 06/09/11 17:52/ sml 30 E200.7 06/08/1118:12 /cp 1.0 E200.8 06/06/11 22:30 / sml 10 E200.8 06/09/11 17:52/ sml 0.50 E200.8 06/06/11 22 :30 / sm I 10 E200.8 06/09/11 17:52 / sml 20 E200.8 06/06/11 22 :30 / sml 5.0 E200.8 06/06/11 22:30 / sml 10 E200.8 07/11 /11 11 :20 / sml 0.50 E200.8 06/06/11 22:30/ sml 100 E200.8 06/09/11 17:52/ sml 0.30 E200.8 06/06/11 22:30 / sml 15 E200.8 06/06/11 22:30/ sml 10 E200.8 06/09/11 17:52/ sml E900.1 06/22/11 21 :58 / ep E900.1 06/22/11 21 :58 / ep E900.1 06/22111 21 :58 / ep MCL -Maximum contaminant level. NO -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 5 of 33 ~1 ' www.energylab.com ~Helena.MT877-472-0711 ./liliings.MT 800-735-4489 • Casper, WV 888-235-0515 ~~ Ana/yticalExcBIIBncs SineB /952 L~ ·"","Giilette; WY 868-686-7175 • Rapid City, SD 888-612-1225 • College Station, TX 888-690-2218 EN:RGY LABORAIOHIES LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Annual Seeps and Springs 2011 LablD: Cll060151-002 Client Sample ID: West Water Seep Analyses Result DATA QUALITY NC Balance (± 5) 17.7 Anions 14.1 Cations 20.1 Solids, Total Dissolved Calculated 993 TDS Balance (O.BO -1,20) 0.B60 -The Anion / Cation balance was confirmed by re-analysis. 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. NO NO NO NO NO NO NO NO NO NO 102 102 100 100 Report Date: 07/11/11 Collection Date: 05/31/11 14:50 DateReceived: 06/03/11 Matrix: Aqueous MCL! Units Qualifier Rl QCl Method Analysis Date I By % Calculation 07/0B/ll 10:541 kbh meq/l Calculation 07/0B/ll 10:54 1 kbh meq/l Calculation 07/0B/ll 10:54 / kbh mg/L Calculation 07/0B/ll 10:541 kbh Calculation 07/0B/ll 10:54 / kbh ug/L 20 SWB260B 06/13/11 13 :44/ jlr ug/L 1.0 SWB260B 06/13/11 13 :44 / jlr ug/L 1.0 SWB260B 06/13/11 13:44/ jlr ug/L 1.0 SWB260B 06/13/11 13:44/ jlr ug/L 1,0 SWB260B 06/13/11 13:44/ jlr ug/L 20 SWB260B 06/13/11 13:441 jlr ug/L 1,0 SWB260B 06/13/11 13:44 / jlr ug/L 1.0 SWB260B 06/13/11 13:44/ jlr ug/L 1,0 SWB260B 06/13/11 13:44/ jlr ug/L 1,0 SWB260B 06/13/11 13:44/ jlr %REC BO-120 SWB260B 06/13/11 13 :44 / jlr %REC 70-130 SWB260B 06/13/11 13 :44 / jlr %REC BO-120 SWB260B 06/13/11 13 :44 / jlr %REC BO-120 SWB260B 06/13/11 13 :44 / jlr MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 6 of 33 EN:RGY LABORATORIES www.energylab.com An.lytlcal ExesllsneB Sines /952 Helena, MT 877-412-0111 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 ,Gillett~, WY 866~686-7175 • Rapid City, SD 888-672-1225 . College Station, TJ( 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Annual Seeps and Springs 2011 LablD: Cll060151-003 Client Sample ID: Ruin Spring 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 241 145 25 0.45 30.6 ND 1.7 3.2 110 486 7.66 942 ND ND ND ND ND ND ND ND ND ND 16 ND 11.8 ND ND ND 9.35 ND 10 -0.03 0.1 0.3 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: 07/11/11 Collection Date: 05/31/11 11 :35 DateReceived: 06/03/11 Matrix: Aqueous MCL! Qualifier Rl QCl Method Analysis Date 1 By D U A2320 B 06/03/11 15 :00 1 jba A2320 B 06/03/11 15:00 1 jba 0.5 E200.7 06/08/11 18:20 1 cp A4500-CI B 06/14/11 10:101 wc 0.10 A4500-F C 06/07/11 13:50 1 jba 0.5 E200.7 06/08/11 18:201 cp 0.05 A4500-NH3 G 06/08/11 16 :02 1 dc 0.1 E353.2 06/06/11 17:02 1 dc 0.5 E200.7 06/08/11 18 :20 1 cp 0.5 E200.7 06/08/11 18 :20 1 cp 10 A4500-S04 E 06/21 /11 16:12 1 Ijl 0.01 A4500-H B 06/03/11 14:41 1 Imc 10 A2540 C 06/03/11 13:531 Imc 5.0 E200.8 06/06/11 22:491 sml 0.50 E200.8 07/11/11 11 :23 1 sml 0.50 E200.8 06/06/11 22:49 1 sml 25 E200.8 06/06/11 22:491 sml 10 E200.8 06/06/11 22:49 1 sml 10 E200.8 06/06/11 22:491 sml 30 E200.7 06/08/11 18 :20 1 cp 1.0 E200.8 06/06/11 22:49 1 sml 10 E200.8 06/06/11 22:491 sml 0.50 E200.8 06/06/11 22:491 sml 10 E200.8 06/06/11 22 :49 1 sml 20 E200.8 06/06/11 22:491 sml 5.0 E200.8 06/06/11 22 :49 1 sml 10 E200.8 06/06/11 22 :49 1 sml 0.50 E200.8 06/06/11 22:491 sml 100 E200.8 06/06/11 22:491 sml 0.30 E200.8 06/06/11 22 :49 1 sml 15 E200.8 06/06/11 22:49 1 sml 10 E200.8 07/11 /11 11 :23 1 sml E900.1 06/22/11 21 :58 1 ep E900.1 06/22/11 21 :58 1 ep E900.1 06/22/11 21 :58 1 ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 7 of 33 EI\ERGY LABORAI OHIES www.energylab.com Analytical Excs/lsncs Sincs /952 Helena, MT 877-472-0711 • BlIJlngs, MT 800-735-4489 • Gasper, WY 888-235-0515 Gillette, WY 866"686-7175 • Rapid City, SD 888-672-1225 . Gollege Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp Annual Seeps and Springs 2011 C11060151-003 Client Sample 10: Ruin Spring Analyses OAT A QUALITY NC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (O.BO -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-dB Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result -0.972 14.9 14.6 942 1.00 ND ND ND ND ND ND ND ND ND ND 101 103 96.0 99.0 Units % meq/L meq/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L %REC %REC %REC %REC Qualifier 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: 07/11/11 Collection Date: 05/31/11 11 :35 DateReceived: 06/03/11 Matrix: Aqueous MCL! QCL Method Analysis Date I By Calculation 06/22/11 15:10 1 kbh Calculation 06122/11 15:10 1 kbh Calculation 06122/11 15:10 1 kbh Calculation 06/22/11 15:101 kbh Calculation 06/22/11 15:10 1 kbh SWB260B 06/13/11 14:20 1 jlr SWB260B 06/13/11 14:201 jlr SWB260B 06/13/11 14:20 1 jlr SWB260B 06/13/11 14:20 1 jlr SWB260B 06/13/11 14:201 jlr SWB260B 06/13/11 14:20 1 jlr SWB260B 06/13/11 14:20 1 jlr SWB260B 06/13/11 14:201 jlr SWB260B 06/13/11 14:20 1 jlr SWB260B 06/13/11 14:20 1 jlr SWB260B 06/13/11 14:20 1 jlr SWB260B 06/13/1114:20 /jlr SWB260B 06/13/11 14:20 1 jlr SWB260B 06/13/11 14:201 jlr MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 8 of 33 EN:RGY LABORAJOnlES www.energylab.com Analytical Excs/lBncB Sincs 1952 Helena, MT 877-472-~711 • llillings, MT 800-735-4489 . Casper, WY 888-235-0515 Gillette, WY 866-686-7175 . Rapid City, SD 888-672-1225 . College station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Annual Seeps and Springs 2011 Lab 10: C11060151-004 Client Sample 10: Back Spring 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 245 145 18 0.45 30.3 ND 1.7 3.2 109 484 7.69 943 ND ND ND ND ND ND ND ND ND ND 16 ND 12.4 ND ND ND 9.17 ND ND 0.03 0.2 0.3 Units mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L s.u. mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L pCi/L pC ilL pC ilL MDC -Minimum detectable concentration U -Not detected at minimum detectable concentration Report Date: 07/11/11 Collection Date: 05/31/11 11 :35 DateReceived: 06/03/11 Matrix: Aqueous MCL! Qualifier RL QCL Method Analysis Date 1 By D U A2320 B 06/03/11 15 :08 1 jba A2320 B 06/03/11 15 :08 1 jba 0.5 E200.7 06/08/11 18 :24 1 cp A4500-CI B 06/14/11 10:111 wc 0.10 A4500-F C 06/07/11 13:53 1 jba 0.5 E200.7 06/08/11 18 :24 1 cp 0.05 A4500-NH3 G 06/08/1116:10 /dc 0.1 E353.2 06/06/11 17:05 1 dc 0.5 E200.7 06/08/11 18:24 1 cp 0.5 E200.7 06/08/11 18:241 cp 10 A4500-S04 E 06/21/1116:1611jl 0.01 A4500-H B 06/03/11 14:4311mc 10 A2540 C 06/03/11 13:5311mc 5.0 E200.8 06/06/11 23 :131 sml 0.50 E200.8 06/09/11 17:55 1 sml 0.50 E200.8 06/06/11 23 :13 1 sml 25 E200.8 06/06/11 23 :131 sml 10 E200.8 06/09/11 17:55 1 sml 10 E200.8 06/06/11 23 :131 sml 30 E200.7 06/08/11 18:241 cp 1.0 E200.8 06/06/11 23 :13 1 sml 10 E200.8 06/09/11 17:55 1 sml 0.50 E200.8 06/06/11 23:13 1 sml 10 E200.8 06/06/11 23 :13 1 sml 20 E200.8 06/06/11 23 :13 1 sml 5.0 E200.8 06/09/11 17:55 1 sml 10 E200.8 06/06/11 23:13 1 sml 0.50 E200.8 06/06/11 23:13 1 sml 100 E200.8 06/06/11 23 :131 sml 0.30 E200.8 06/06/11 23 :13 1 sml 15 E200.8 06/06/11 23:13 1 sml 10 E200.8 07/11/11 11 :26 1 sml E900.1 06/22/11 21 :58 1 ep E900.1 06/22/11 21 :58 1 ep E900.1 06/22/11 21 :58 1 ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 9 of 33 EN:RGY LAS ORA.ORIES www.energylab.com ( Analytical Excsllsncs Sincs 1952 J, Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 866-686-7175 • Rapid City, SO 888-672-1225 • College Station, lX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp Annual Seeps and Springs 2011 Cll060151-004 Client Sample 10: Back Spring Analyses DATA QUALITY NC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (O.BO -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-dB Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result -0.612 14.7 14.5 933 1.01 ND ND ND ND ND ND ND ND ND ND 10B 119 104 100 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 BO-120 70-130 BO-120 BO-120 Report Date: 07/11/11 Collection Date: 05/31/11 11 :35 DateReceived: 06/03/11 Matrix: Aqueous MCL! QCl Method Analysis Date / By Calculation 06/22/11 15:10 / kbh Calculation 06/22/11 15:10/ kbh Calculation 06/22/11 15:10/ kbh Calculation 06/22/11 15:10/ kbh Calculation 06/22/11 15:101 kbh SWB260B 06/13/11 14:57 / jlr SWB260B 06/13/11 14:571 jlr SWB260B 06/13/11 14:571 jlr SWB260B 06/13/11 14:571 jlr SWB260B 06/13/11 14:57 1 jlr SWB260B 06/13/11 14:57 1 jlr SWB260B 06/13/11 14:571 jlr SWB260B 06/13/11 14:571 jlr SWB260B 06/13/11 14:571 jlr SWB260B 06/13/11 14:571 jlr SWB260B 06/13/11 14:57 1 jlr SWB260B 06/13/11 14:57 1 jlr SWB260B 06/13/11 14:57 / jlr SWB260B 06/13/11 14:57 1 jlr MCL -'Maximum contaminant level. ND -Not detected at the reporting limit. Page 10 of 33 EN:RGY LAB ORAIOnlES WWII.energylab.com Analytical Excsllsncs Sincs 1952 r-. ·Helena, MT 877-472-0711 • Bl1Iings, MT 800-735-4489 • Casper, WY 8B8-235-0515 J:""i." Gihette, WYB66-686-7175 • Rapid City, SD 888-672·1225 • College Station, lX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Annual Seeps and Springs 2011 Lab 10: Cll060151-005 Client Sample 10: Entrance Seep 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 270 88.8 49 0.58 26.4 ND 1.4 2.6 62.5 166 7.96 571 ND ND ND ND ND ND 37 ND 47 ND ND ND 13.1 ND ND ND 18.8 ND ND 1.5 0.3 0.3 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: 07/11/11 Collection Date: 05/31/11 09 :50 DateReceived: 06/03/11 Matrix: Aqueous MCL! Qualifier RL QCL Method Analysis Date I By D A2320 B 06/03/1115:16 /jba A2320 B 06/03/11 15:16 I jba 0.5 E200.7 06/08/11 18 :28 I cp A4500-CI B 06/14/11 10: 14 I wc 0.10 A4500-F C 06/07/11 13:56 1 jba 0.5 E200.7 06/08/11 18 :28 I cp 0.05 A4500-NH3 G 06/08/1116:12 /dc 0.1 E353.2 06/06/11 17:07 I dc 0.5 E200.7 06/08/11 18:28 1 cp 0.5 E200.7 06/08/11 18:281 cp 5 A4500-S04 E 06/21/11 16:24 /1jl 0.01 A4500-H B 06/03/11 14:45 /1mc 10 A2540 C 06/03/11 13 :53 Ilmc 5.0 E200.8 06/09/11 17:58 I sml 0.50 E200.8 06/09/11 17:58 1 sml 0.50 E200.8 06/09/11 17:58 1 sml 25 E200.8 06/09/11 17:581 sml 10 E200.8 06/09/11 17:58 1 sml 10 E200.8 06/09/11 17:58 1 sml 30 E200.7 06/08/11 18:281 cp 1.0 E200.8 06/06/11 23:18 I sml 10 E200.8 06/09/11 17:58 I sml 0.50 E200.8 06/06/11 23:18 I sml 10 E200.8 06/09/11 17:58 1 sml 20 E200.8 06/09/11 17:581 sml 5.0 E200.8 06/09/11 17:58 1 sml 10 E200.8 07/11 /11 11 :29 1 sml 0.50 E200.8 06/06/11 23:181 sml 100 E200.8 06/09/11 17:581 sml 0.30 E200.8 06/06/11 23:18 1 sml 15 E200.8 06/09/11 17:581 sml 10 E200.8 07/11/11 11 :29 1 sml E900.1 06/22/11 21 :58 I ep E900.1 06/22/11 21 :58 I ep E900.1 06/22/11 21 :58 I ep MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 11 of 33 EN:RGY LABORATORIES www.energylab.com Analytical ExesllsncB SInes 1952 Helena, MT 877-472-0711 ellillings, MT 800-735-4489 e Casper, WY 888-235-0515 Gillette, WY86&-686-7175 e Rapid City, SO 888-612-1225 . College Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp Annual Seeps and Springs 2011 Cll060151-005 Client Sample 10: Entrance Seep Analyses OAT A QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (O.BO -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-dB Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result -0.0644 9.40 9.39 553 1.03 NO NO NO NO NO NO NO NO NO NO 104 100 100 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 BO-120 70-130 BO-120 BO-120 Report Date: 07/11/11 Collection Date: 05/31/1109:50 DateReceived: 06/03/11 Matrix: Aqueous MCL! QCL Method Analysis Date 1 By Calculation 06/22/11 15:10 1 kbh Calculation 06122/11 15:101 kbh Calculation 06122/11 15:10 1 kbh Calculation 06/22/11 15:101 kbh Calculation 06/22/11 15:10 1 kbh SWB260B 06/13/1 1 15 :33 1 jlr SWB260B 06/13/11 15 :33 1 jlr SWB260B 06/13/11 15 :33 1 jlr SWB260B 06/13/11 15:33 1 jlr SWB260B 06/13/1 1 15 :33 1 jlr SWB260B 06/13/11 15:33 1 jlr SWB260B 06/13/11 15:33 1 jlr SWB260B 06/13/11 15:331 jlr SWB260B 06/13/11 15:33 1 jlr SWB260B 06/13/11 15:331 jlr SWB260B 06/13/11 15:331 jlr SWB260B 06/1 3/11 15 :33 1 jlr SWB260B 06/13/11 15 :33 1 jlr SWB260B 06/13/11 15 :33 1 jlr MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 12 of 33 EN:RGY LASORAI OFllE;S www.energylab.com An./yllc.' £Xcsl/sncB Slnc, 1952 Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 866-686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp Annual Seeps and Springs 2011 C11060151-006 Client Sample 10: Trip Blank Analyses VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-0ichlorobenzene-d4 Surr: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result NO NO NO NO NO NO NO NO NO NO 109 126 102 98.0 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 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: 07/11 /11 Collection Date: 05/31/1-1 DateReceived: 06/03/11 Matrix: Aqueous MCL! QCL Method Analysis Date 1 By SW8260B 06/13/1 1 16:09 1 ilr SW8260B 06/13/11 16:091 ilr SW8260B 06/13/11 16:09 1 ilr SW8260B 06/13/11 16:091 ilr SW8260B 06/13/11 16:09 1 ilr SW8260B 06/13/11 16:09 1 ilr SW8260B 06/13/1 1 16 :09 1 ilr SW8260B 06/13/11 16 :09 1 ilr SW8260B 06/13/11 16 :09 1 ilr SW8260B 06/13/11 16 :09 1 ilr SW8260B 06/13/11 16:09 1 ilr SW8260B 06/13/11 16:09 1 ilr SW8260B 06/13/11 16:09 1 ilr SW8260B 06/13/11 16 :09 1 ilr MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 13 of 33 EI\ERGY LABORArORJES www.energylab.com Analytical Excsllsncs Sincs 1952 Helena, MT 877-472-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 Giliett~, Wv 86&-686-7175 • Rapid City, SO 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 Annual Seeps and Springs 2011 C11060151-007 Client Sample 10: Temp Blank Analyses PHYSICAL PROPERTIES Temperature Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. Result Units 2.2 Qualifier RL Report Date: 07/11 /11 Collection Date: 05/31/11 DateReceived: 06/03/11 Matrix: Aqueous MCL! QCL Method Analysis Date / By E170.1 06/03/11 09 :00 / kbh MCl -Maximum contaminant level. ND -Not detected at the reporting limit. Page 14 of 33 EI\ERGY LABORATORIES www.energylab.com An.IytICBI IxeBIIBneB SlneB /952 Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillet~e, WY 866-686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Annual Seeps and Springs 2011 Analyte Count Result Units Method: A2320 B Sample 10: MBLK 3 Method Blank Alkalinity, Total as CaC03 2.23 mg/L Carbonate as C03 ND mg/L Bicarbonate as HC03 2.72 mg/L Sample 10: LCS Laboratory Control Sample Alkalinity, Total as CaC03 212 mg/L Sample 10: C11060146-001CMS Sample Matrix Spike Alkalinity, Total as CaC03 239 mg/L Sample 10: C11060151-005AOUP 3 Sample Duplicate Alkalinity, Total as CaC03 221 mg/L Carbonate as C03 ND mg/L Bicarbonate as HC03 270 mg/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration RL 5.0 1.0 1.0 5.0 5.0 5.0 5.0 5.0 Report Date: 07/11 /11 Work Order: C11060151 %REC Low Limit High Limit RPO RPOLlmlt Qual Batch: R146580 Run: MANTECH_11 0603A 06/03/1112:11 Run: MANTECH_11 0603A 06/03/11 12 :26 105 90 110 Run: MANTECH_11 0603A 06/03/11 13:35 102 80 120 Run: MANTECH 110603A 06/03/1 1 15:28 0.1 10 10 0.1 10 ND -Not detected at the reporting limit. Page 15 of 33 www.energylab.com An.lytleal Exe.l/.ne. Sine. 1952 EN:RGY LABORAT ORIES ( Helena, MT 877 -472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, IVY 866-686-7175 • Rapid City, SO 888-672-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Annual Seeps and Springs 2011 Analyte Count Method: A2540 C Result Sample 10: MBLK1_ Solids, Total Dissolved TDS @ 180 C Method Blank NO Units mg/L Sample 10: LCS1_ Laboratory Control Sample Solids, Total Dissolved TDS @ 180 C 1000 mg/L Sample 10: Cll060149-006AOUP Sample Duplicate Solids, Total Dissolved TDS @ 180 C 962 mg/L Sample 10: Cll060151-005AMS Sample Matrix Spike Solids, Total Dissolved TDS @ 180 C 2510 mg/L Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration RL 4 10 10 10 Report Date: 07/11/11 Work Order: C11060151 %REC Low Limit High Limit RPO RPOLimit Qual Batch: R146649 Run: BAL-l_ll0603B 06/03/11 13:49 Run: BAL-l_ll0603B 06/03/1 1 13:50 100 90 110 Run: BAL-l 110603B 06/03/1 1 13:52 - 0.8 10 Run: BAL-l_ll0603B 06/03/11 13 :54 99 90 110 NO -Not detected at the reporting limit. Page 16 of 33 EN:RGY LABORATORIES www.energylab.com Analytical Excsllsncs Sincs 1952 Helena, MT 877-472-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 Gillette, '/Iy 866-686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Annual Seeps and Springs 2011 Analyte Count Result Units Method: A4500-CI B Sample 10: MBLK9-6/14/2011 Chloride Sample 10: C11060152-004AMS Chloride Sample 10: C11060152-004AMSO Chloride Sample 10: LCS35-6/14/2011 Chloride Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mg/L Sample Matrix Spike 251 mg/L Sample Matrix Spike Duplicate 251 mg/L Laboratory Control Sample 3530 mg/L Report Date: 07/11 III Work Order: Cll060151 RL %REC Low Limit High Limit RPO RPOLimlt Qual Batch: 6/14/2011-CL-TIR-W Run: TITRATION_110614A 06/14/1109:58 0.5 Run: TITRATION_110614A 06/14/11 10:35 1.0 92 90 110 Run: TITRATION 110614A 06/14/11 10:42 1.0 92 90 110 0.0 10 Run: TITRATION 110614A 06/14/11 11 :16 1.0 100 90 110 ND -Not .detected at the reporting limit. Page 17 of 33 EN:RGY LABORATORIES www.energylab.com Analytical Excsl/sncs Sincs 1952 Helena, MT 877-472-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 GiJI~tt~, WV 866-686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Annual Seeps and Springs 2011 Analyte Count Result Units Method: A4S00-F C Sample 10: MBLK Fluoride Sample 10: LCS Fluoride Sample 10: C11060149-00SAMS Fluoride Sample 10: C11060149-00SAMSO Fluoride Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank 0.04 mg/L Laboratory Control Sample 0.980 mg/L Sample Matrix Spike 1.14 mg/L Sample Matrix Spike Duplicate 1.06 mg/L Report Date: Work Order: RL %REC Low Limit High Limit RPO Run: MANTECH_110607A 0.008 Run: MANTECH_110607A 0.10 94 90 110 Run: MANTECH 110607A 0.10 96 80 120 Run: MANTECH_11 0607A 0.10 88 80 120 7.3 ND -Not detected at the reporting limit. 07/11/11 C11060151 RPOLimit Qual Batch: R146671 06/07/11 10:21 06/07/11 10:24 06/07/11 13 :28 06/07/11 13 :31 10 Page 18 of 33 www.energylab.com EN:RGY LABORATORIES Analytical Excsllsncs Sincs 1952 ~elena, MTB77 -472-0711 • Billings, MT 800-735-4489 • Gasper, WY 888-235-0515 Gillette, WY 866-686-7175 • Rapid City, SO 888-672-1225 • College Station, TX 888-690-2218 Client: Denison Mines USA Corp Project: Annual Seeps and Springs 2011 Analyte Count Method: A4500-H B QA/QC Summary Report Prepared by Casper, WY Branch Report Date: 07/11 III Work Order: Cll060151 Result Units RL %REC Low Limit High Limit RPO RPOLlmlt Qual Sample 10: ICV1_110603_2 pH Initial Calibration Verification Standard Analytical Run: ORION555A-2_11 0603B 06/03/11 14:30 Method: A4500-H B Sample 10: C11060146-001COUP pH Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration 6.89 s.u. 0.010 100 98 102 Batch: 11 0603_2]H-W _555A-2 Sample Duplicate Run: ORION555A-2_110603B 06/03/1114:54 8.01 S.u. 0.010 0.1 3 ND -Not detected at the reporting limit. Page 19 of 33 EI\ERGY LABORATOr~IES www.energylab.com Analytical £Xcsl/snca Slncs 1952 Helena, MT 877 -472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gjll~tte,'WY 866-686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 07/11 /11 Project: Annual Seeps and Springs 2011 Work Order: C11060151 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: A4500-NH3 G Batch: R146719 Sample 10: MBLK-1 Method Blank Run: TECHNICON_11 0608B 06/08/11 14 :46 Nitrogen, Ammonia as N ND mg/L 0.02 Sample 10: LCS-2 Laboratory Control Sample Run : TECHNICON_11 0608B 06/08/11 14 :48 Nitrogen, Ammonia as N 2.00 mg/L 0.050 100 90 110 Sample 10: LFB-3 Laboratory Fortified Blank Run: TECHNICON_11 0608B 06/08/11 14:50 Nitrogen, Ammonia as N 1.86 mg/L 0.050 95 80 120 Sample 10: C11060151-0030MS Sample Matrix Spike Run: TECHNICON_11 0608B 06/08/11 16:04 Nitrogen, Ammonia as N 1.88 mg/L 0.050 96 80 120 Sample 10: C11060151-0030MSO Sample Matrix Spike Duplicate Run: TECHNICON_11 0608B 06/08/11 16:06 Nitrogen, Ammonia as N 1.88 mg/L 0.050 96 80 120 0.0 10 Qualifiers: RL -Analyte reporting limit. ND -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 20 of 33 ====---EN:RGY LABORATORIES www.energylab.com Analytical Excsllsnes Sincs 1952 r-Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 j,.i", ','Gi!lette, WY 86&~686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Annual Seeps and Springs 2011 Analyte Count Result Units Method: A4500-S04 E Sample 10: MBLK-l_ll0621 Sulfate Sample 10: LCS-l_ll0621 Sulfate Sample 10: Cll060151-00SAMS Sulfate Sample 10: Cll060151-005AMSO Sulfate Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mg/L Laboratory Control Sample 4920 mg/L Sample Matrix Spike 261 mg/L Sample Matrix Spike Duplicate 260 mg/L Report Date: 07/11 III Work Order: Cll060151 RL %REC Low Limit High limit RPO RPOLimit Qual Batch: 110621_1_S04-TURB-W Run: TURB-2_110621A 06/21/11 15:44 0.8 Run: TURB-2_110621A 06/21/11 15:58 100 102 90 110 Run: TURB-2 110621A 06/21/11 16:29 - 5.0 98 90 110 Run: TURB-2 110621A 06/21 /11 16:33 - 5.0 97 90 110 0.4 10 ND -Not detected at the reporting limit. Page 21 of 33 EN:RGY LABORATORIES www.energylab.com Anslytlcl1l Excsllsncs Sincs /952 Helena, MT 877-472-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 '.GiI!et~e, 'NY 866-686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 07/11 III Project: Annual Seeps and Springs 2011 Work Order: Cll060151 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: E200.7 Batch: R146722 Sample 10: MB-11060SA 5 Method Blank Run: ICP2-C_ll0608A 06/08/11 13 :14 Calcium NO mg/L 0.1 Iron NO mg/L 0.001 Magnesium NO mg/L 0.05 Potassium NO mg/L 0.05 Sodium NO mg/L 0.2 Sample 10: LFB-11060SA 5 Laboratory Fortified Blank Run: ICP2-C_ll 0608A 06/08/11 13:18 Calcium 47.2 mg/L 0.50 95 85 115 Iron 0.952 mg/L 0.030 95 85 115 Magnesium 47.1 mg/L 0.50 94 85 115 Potassium 43.2 mg/L 0.50 86 85 115 Sodium 48.8 mg/L 0.50 98 85 115 Sample 10: C11060151-001BMS2 5 Sample Matrix Spike Run : ICP2-C_ll0608A 06/08/11 18:04 Calcium 189 mg/L 1.0 92 70 130 Iron 1.99 mg/L 0.030 95 70 130 Magnesium 121 mg/L 1.0 94 70 130 Potassium 93.6 mg/L 1.0 86 70 130 Sodium 324 mg/L 1.0 93 70 130 Sample 10: C11060151-001BMSO 5 Sample Matrix Spike Duplicate Run: ICP2-C_ll0608A 06/08/11 18:08 Calcium 189 mg/L 1.0 91 70 130 0.3 20 Iron 1.97 mg/L 0.030 94 70 130 0.9 20 Magnesium 121 mg/L 1.0 94 70 130 0.0 20 Potassium 94.2 mg/L 1.0 86 70 130 0.6 20 Sodium 322 mg/L 1.0 91 70 130 0.6 20 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 22 of 33 EN:RGY LABORATORIES www.energylab.com Analytlca' ExcBIIBncB SlncB 1952 r-Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 J~.n . Gillette, WY 866-686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Annual Seeps and Springs 2011 Analyte Count Result Units Method: E200.7 Sample 10: MB-110701A Calcium Magnesium Potassium Sodium Sample 10: LFB-110701A Calcium Magnesium Potassium Sodium Sample 10: C11060151-002BMS2 Calcium Magnesium Potassium Sodium 4 4 4 Method Blank ND mg/L ND mg/L ND mg/L ND mg/L Laboratory Fortified Blank 47.2 mg/L 46.5 mg/L 44.4 mg/L 47.7 mg/L Sample Matrix Spike 341 mg/L 131 mg/L 93.2 mg/L 213 mg/L Sample 10: C11060151-002BMSO 4 Sample Matrix Spike Duplicate Calcium 340 mg/L Magnesium Potassium Sodium Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration 130 mg/L 92.0 mg/L 214 mg/L Report Date: 07/11 III Work Order: Cl1060151 RL %REC Low Limit High Limit 0.1 0.05 0.05 0.2 0.50 0.50 0.50 0.50 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 94 93 89 95 92 95 88 99 92 93 86 100 Run: ICP2-C_ll 0701A Run: ICP2-C_ll0701A 85 115 85 115 85 115 85 115 Run: ICP2-C_ll0701A 70 130 70 130 70 130 70 130 Run: ICP2-C_ll0701A 70 130 70 130 70 130 70 130 ND -Not detected at the reporting limit. RPO RPOLimit Qual 0.1 1.2 1.3 0.5 Batch : R147625 07/01/11 13 :47 07/01/11 13:51 07/01/11 14:56 07/01/11 15:00 20 20 20 20 Page 23 of 33 EI\ERGY LABORATORIES www.energylab.com Analytical Exesllsnes SInes 1952 Helena, MTB77-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 . Gillette, WY 866-686-7175 . Rapid City, SD 888-672-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Annual Seeps and Springs 2011 Analyte Count Method: E200.8 Result Sample 10: LRB 13 Method Blank Arsenic NO Beryllium NO Cadmium NO Chromium NO Cobalt NO Copper NO Manganese NO Molybdenum NO Nickel NO Selenium NO Tin 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 Sample 10: LFB 13 Laboratory Fortified Blank Arsenic 0.0510 mg/L Beryllium 0.0486 mg/L Cadmium 0.0506 mg/L Chromium 0.0493 mg/L Cobalt 0.0492 mg/L Copper 0.0516 mg/L Manganese 0.0489 mg/L Molybdenum 0.0529 mg/L Nickel 0.0515 mg/L Selenium 0.0520 mg/L Tin 0.0528 mg/L Vanadium 0.0482 mg/L Zinc 0.0524 mg/L Sample 10: C11060160-0010MS4 13 Sample Matrix Spike Arsenic 0.0516 mg/L Beryllium 0.0474 mg/L Cadmium 0.0484 mg/L Chromium 0.0459 mg/L Cobalt 0.0480 mg/L Copper 0.0495 mg/L Manganese 0.0469 mg/L Molybdenum 0.0816 mg/L Nickel 0.0502 mg/L Selenium 0.0524 mg/L Tin 0.0521 mg/L Vanadium 0.0467 mg/L Zinc 0.0540 mg/L Qualifiers: RL -Analyte reporting limit. MOC -Minimum detectable concentration Report Date: 07/11 /11- Work Order: C11060151 RL %REC Low Limit High Limit RPO RPDLimit Qual 0.0050 0.00050 0.00050 0.020 0.010 0.010 0.010 0.010 0.020 0.0050 0.10 0.020 0.010 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 0.010 0.010 0.0010 0.010 0.010 0.010 0.0010 0.050 0.0010 0.0010 0.0010 0.010 102 97 101 99 99 103 98 106 103 104 106 96 105 103 95 97 92 96 93 93 107 95 105 104 93 94 Run: ICPMS2·C_11 0609A Run : ICPMS2-C_110609A 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 0609A 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 70 130 NO -Not detected at the reporting limit. Batch: R146795 06/09/11 11 :30 06/09/11 11 :36 06/09/11 18:06 Page 24 of 33 EN:RGY LABORATORIES www.energylab.com Analytical Exesllsnes Slncs 1952 , ' Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 . Gillette, VlY 866-686-7175 • Rapid City, SO 888-672-1225 • College Station, TX 888-690-2218 OA/oe Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 07/11/11 Project: Annual Seeps and Springs 2011 Work Order: Cll060151 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: E200.8 Batch: R146795 Sample 10: C11060160-0010MSO 13 Sample Matrix Spike Duplicate Run: ICPMS2-C_l1 0609A 06/09/11 18:09 Arsenic 0.0526 mg/L 0.0010 105 70 130 1.8 20 Beryllium 0.0475 mg/L 0.010 95 70 130 0.1 20 Cadmium 0.0496 mg/L 0.010 99 70 130 2.3 20 Chromium 0.0455 mg/L 0.0010 91 70 130 0.9 20 Cobalt 0.0484 mg/L 0.010 97 70 130 0.7 20 Copper 0.0506 mg/L 0.010 95 70 130 2.2 20 Manganese 0.0470 mg/L 0.010 93 70 130 0.2 20 Molybdenum 0.0839 mg/L 0.0010 111 70 130 2.7 20 Nickel 0.0519 mg/L 0.050 99 70 130 3.3 20 Selenium 0.0531 mg/L 0.0010 106 70 130 1.4 20 Tin 0.0540 mg/L 0.0010 108 70 130 3.5 20 Vanadium 0.0471 mg/L 0.0010 94 70 130 1.0 20 Zinc 0.0549 mg/L 0.010 95 70 130 1.7 20 Method: E200.8 Batch: R147903 Sample 10: LRB 3 Method Blank Run: ICPMS2-C_l1 0711 A 07/11/11 11 :08 Beryllium ND mg/L 0.0001 Silver 0.0001 mg/L lE-05 Zinc 9E-05 mg/L 6E-05 Sample 10: LFB 3 Laboratory Fortified Blank Run: ICPMS2-C_ll0711A 07/11 /11 11 :11 Beryllium 0.0549 mg/L 0.0010 110 85 115 Silver 0.0213 mg/L 0.0010 106 85 115 Zinc 0.0576 mg/L 0.0010 115 85 115 Sample 10: C1107025B-005BMS4 3 Sample Matrix Spike Run: ICPMS2-C_ll 0711 A 07/11 /11 11 :58 Beryllium 0.0443 mg/L 0.010 89 70 130 Silver 0.0174 mg/L 0.010 87 70 130 Zinc 0.0592 mg/L 0.010 99 70 130 Sample 10: C1107025B-005BMSO 3 Sample Matrix Spike Duplicate Run: ICPMS2-C_ll 0711 A 07/11/11 12:01 Beryllium 0.0455 mg/L 0.010 91 70 130 2.6 20 Silver 0.0195 mg/L 0.010 97 70 130 11 20 Zinc 0.0601 mg/L 0.010 101 70 130 1.4 20 Qualifiers: RL -Analyte reporting limit ND -Not detected at the reporting limit MDC -Minimum detectable concentration Page 25 of 33 EN:RGY LAB ORATORIES www.energylab.com Analytical £XcIl/lncl Slncl 1952 Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gilleti:~, WV866-686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Annual Seeps and Springs 2011 Analyte Method: E200.8 Sample 10: C11060151-002BMS4 Arsenic Cadmium Chromium Cobalt Copper Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Count Result Units 16 Sample Matrix Spike 0.286 mg/L 0.255 mg/L 0.258 mg/L 0.262 mg/L 0.277 mg/L 0.299 mg/L 0.558 mg/L 0.0238 mg/L 0.249 mg/L 0.275 mg/L 0.269 mg/L 0.0547 mg/L 0.255 mg/L 0.149 mg/L 0.265 mg/L 0.301 mg/L Sample 10: C11060151-002BMSO 16 Sample Matrix Spike Duplicate Arsenic 0.284 mg/L Cadmium 0.261 mg/L Chromium Cobalt Copper Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium 0.259 0.268 mg/L mg/L 0.278 mg/L 0.300 mg/L 0.568 mg/L 0.0246 mg/L 0.256 mg/L 0.275 mg/L 0.273 0.0606 0.258 0.151 0.266 0.300 mg/L mg/L mg/L mg/L mg/L mg/L Sample 10: LRB Arsenic Cadmium Chromium Cobalt 16 Method Blank Copper Lead Manganese Mercury Molybdenum Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration ND mg/L ND mg/L ND mg/L ND mg/L ND mg/L ND mg/L ND mg/L ND mg/L ND mg/L Report Date: 07/11/11 Work Order: C11060151 RL %REC Low Limit High Limit 0.0010 0.010 0.050 0.010 0.010 0.050 0.010 0.0010 0.10 0.050 0.0010 0.010 0.10 0.10 0.00030 0.10 0.0010 0.010 0.050 0.010 0.010 0.050 0.010 0.0010 0.10 0.050 0.0010 0.010 0.10 0.10 0.00030 0.10 4E-05 7E-05 5E-05 1E-05 6E-05 2E-05 2E-05 2E-05 8E-05 109 101 103 101 91 103 71 95 99 98 107 55 102 57 103 107 109 104 104 103 92 104 75 99 101 98 109 61 103 58 104 107 Run: ICPMS4-C_11 0606A 70 130 70 130 70 70 70 70 70 70 70 70 70 70 70 70 70 70 130 130 130 130 130 130 130 130 130 130 130 130 130 130 Run: ICPMS4-C_11 0606A 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_11 0606A ND -Not detected at the reporting limit. S -Spike recovery outside of advisory limits. RPO RPOLimit Qual 0.8 2.5 0.3 2.5 0.5 0.6 1.8 3.6 2.6 0.2 1.3 10 1.0 1.6 0.3 0.1 Batch: R146625A 06/06/11 22:35 S S 06/06/11 22:39 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 S S 06/06/11 14:08 Page 26 of 33 EN:RGY LABORATORIES www.energylab.com Malyi/cal Exesllsne. Sine. '952 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 . CDllege StatiDn, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 07/11 III Project: Annual Seeps and Springs 2011 Work Order: Cll060151 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: E200.B Batch: R146625A Sample 10: LRB 16 Method Blank Run: ICPMS4-C_ll 0606A 06/06/11 14:0B Nickel 0.0001 mg/L 5E-05 Selenium NO mg/L 5E-05 Silver NO mg/L BE-05 Thallium NO mg/L 2E-05 Tin NO mg/L 0.0002 Uranium NO mg/L 8E-06 Vanadium NO mg/L lE-05 Sample 10: LFB 16 Laboratory Fortified Blank Run: ICPMS4-C_l l 0606A 06/06/11 14:12 Arsenic 0.0523 mg/L 0.0010 105 85 115 Cadmium 0.0522 mg/L 0.0010 104 85 115 Chromium 0.0516 mg/L 0.0010 103 85 115 Cobalt 0.0520 mg/L 0.0010 104 85 115 Copper 0.0519 mg/L 0.0010 104 85 115 Lead 0.0507 mg/L 0.0010 101 85 115 Manganese 0.0509 mg/L 0.0010 102 85 115 Mercury 0.00504 mg/L 0.0010 101 85 115 Molybdenum 0.0506 mg/L 0.0010 101 85 115 Nickel 0.0521 mg/L 0.0010 104 85 115 Selenium 0.0516 mg/L 0.0010 103 85 115 Silver 0.0198 mg/L 0.0010 99 85 115 Thallium 0.0507 mg/L 0.0010 101 85 115 Tin 0.0513 mg/L 0.0010 103 85 115 Uranium 0.0501 mg/L 0.00030 100 85 115 Vanadium 0.0511 mg/L 0.0010 102 85 115 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporti ng limit. MOC - Minimum detectable concentration Page 27 of 33 EN:RGY LABORAT ORIES www.energylab.com An.lytlc./ Excsl/sncs SInes /952 Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 866-686-7175 • Rapid City, SO 888-672-1225 • College Station, IX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Annual Seeps and Springs 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: C11060149-007HMS Nitrogen, Nitrate+Nitrite as N Sample 10: C11060149-007HMSO Nitrogen, Nitrate+Nitrite as N Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank ND mg/L Laboratory Control Sample 2.66 mg/L Sample Matrix Spike 3.27 mg/L Sample Matrix Spike Duplicate 3.33 mg/L Report Date: Work Order: RL %REC Low Limit High Limit RPO Run: TECHNICON_11 0606B 0.06 Run: TECHNICON_110606B 0.10 106 90 110 Run: TECHNICON_11 0606B 0.10 98 90 110 Run: TECHNICON_11 0606B 0.10 102 90 110 1.8 ND -Not detected at the reporting limit. 07/11/11 C11060151 RPOLimit Qual Batch: R146607 06/06/11 16 :32 06/06/11 16:35 06/06/11 16:50 06/06/11 16:52 10 Page 28 of 33 EN:RGY LABORATORIES www.energylab.com Analytical Excal/sneB Sines 1952 Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WV 888-235-0515 Gillette, WY 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 Report Date: 07/11/11 Project: Annual Seeps and Springs 2011 Work Order: C11060151 ._--------_.- Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: E900.1 Batch: GA-044S Sample 10: MB-GA-0445 3 Method Blank Run: GSOOOW_ll0617A 06/22/11 17:14 Gross Alpha minus Rn & U -0.001 pCi/L U Gross Alpha minus Rn & U Precision (±) 0.3 pCi/L Gross Alpha minus Rn & U MOC O.S pCi/L Sample 10: LCS-GA-0445 Laboratory Control Sample Run: GSOOOW _110617 A 06/22/11 17:14 Gross Alpha minus Rn & U 23.8 pC ilL 113 70 130 Sample 10: C11060151-005CMS Sample Matrix Spike Run: GSOOOW_110617A 06/22/11 21 :S8 Gross Alpha minus Rn & U 22.9 pCilL 102 70 130 Sample 10: C11060151-005CMSO Sample Matrix Spike Duplicate Run : GSOOOW_110617A 06/22/11 21 :S8 Gross Alpha minus Rn & U 21 .S pC ilL 9S 70 130 6.4 23.9 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MOC -Minimum detectable concentration U -Not detected at minimum detectable concentration Page 29 of 33 EN:RGY LABORATORIES www.energylab.com An.lytle.' Exe.1I8neB Sines /952 Helena, MT817-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 86&-686-7175 • Rapid City, SO 888-672-1225 • College Station, TX 888-&90-2218 QA/Qe Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 07/11 /11 Project: Annual Seeps and Springs 2011 Work Order: Cll060151 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: SW8260B Batch: R146901 Sample 10: 06131CLCS_20 15 Laboratory Control Sample Run: SATURNCA_ll0613A 06/13/11 20:20 Benzene 11 ug/L 1.0 110 70 130 Carbon tetrachloride 12 ug/L 1.0 122 70 130 Chloroform 12 ug/L 1.0 121 70 130 Chlorom ethane 11 ug/L 1.0 107 70 130 m+p-Xylenes 22 ug/L 1.0 110 70 130 Methyl ethyl ketone 120 ug/L 20 124 70 130 Methylene chloride 13 ug/L 1.0 128 70 130 Naphthalene 11 ug/L 1.0 115 70 130 o-Xylene 11 ug/L 1.0 108 70 130 Toluene 11 ug/L 1.0 110 70 130 Xylenes, Total 33 ug/L 1.0 110 70 130 Surr: 1,2-0ichlorobenzene-d4 1.0 102 80 120 Surr: Oibromofluoromethane 1.0 111 70 130 Surr: p-Bromofluorobenzene 1.0 104 80 130 Surr: Toluene-d8 1.0 103 80 120 Sample 10: 061311_MBLK_7 15 Method Blank Run: SATURNCA_ll0613A 06/13/1 1 12:32 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 1.0 105 80 120 Surr: Oibromofluoromethane 1.0 99 70 130 Surr: p-Bromofluorobenzene 1.0 97 80 120 Surr: Toluene-d8 1.0 98 80 120 Sample 10: C11060108-0010MS 15 Sample Matrix Spike Run: SA TURNCA_ 110613A 06/13/11 17:56 Benzene 200 ug/L 10 100 70 130 Carbon tetrachloride 210 ug/L 10 105 70 130 Chloroform 210 ug/L 10 106 70 130 Chloromethane 190 ug/L 10 93 70 130 m+p-Xylenes 400 ug/L 10 101 70 130 Methyl ethyl ketone 2200 ug/L 200 111 70 130 Methylene chloride 230 ug/L 10 114 70 130 Naphthalene 190 ug/L 10 97 70 130 o-Xylene 190 ug/L 10 96 70 130 Toluene 200 ug/L 10 99 70 130 Xylenes, Total 600 ug/L 10 99 70 130 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MOC -Minimum detectable concentration Page 30 of 33 EN:RGY LABORATORIES www.energylab.com Analytical Excellence Sincs 1952 Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, WY 86&-686-7175 • Rapid City, SO 888-672-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 07/11 III Project: Annual Seeps and Springs 2011 Work Order: Cll060151 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: SW8260B Batch: R146901 Sample 10: C11060108-001DMS 15 Sample Matrix Spike Run: SATURNCA_ll 0613A 06/13/11 17 :56 Surr: 1,2-Dichlorobenzene-d4 1.0 106 80 120 Surr: Dibromofluoromethane 1.0 106 70 130 Surr: p-Bromofluorobenzene 1.0 99 80 120 Surr: Toluene-d8 1.0 102 80 120 Sample 10: C11060108-001DMSO 15 Sample Matrix Spike Duplicate Run: SATURNCA -110613A 06/13/11 18:32 Benzene 220 ug/L 10 110 70 130 10 20 Carbon tetrachloride 250 ug/L 10 127 70 130 19 20 Chloroform 240 ug/L 10 122 70 130 13 20 Chloromethane 220 ug/L 10 111 70 130 18 20 m+p-Xylenes 470 ug/L 10 118 70 130 16 20 Methyl ethyl ketone 2300 ug/L 200 117 70 130 5.3 20 Methylene chloride 260 ug/L 10 129 70 130 12 20 Naphthalene 220 ug/L 10 112 70 130 14 20 a-Xylene 220 ug/L 10 112 70 130 15 20 Toluene 230 ug/L 10 113 70 130 13 20 Xylenes, Total 700 ug/L 10 116 70 130 15 20 Surr: 1,2-Dichlorobenzene-d4 1.0 102 80 120 0.0 10 Surr: Dibromofluoromethane 1.0 110 70 130 0.0 10 Surr: p-Bromofluorobenzene 1.0 102 80 120 0.0 10 Surr: Toluene-d8 1.0 101 80 120 0.0 10 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MOC -Minimum detectable concentration Page 31 of 33 EN:RGY LABORAT ORIES ~)l' www.energylab.com ~ An.lyt(c.,Excsll.ncBSincB 1952 Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 ,Gille~e; WY 866-&86-7175 • Rapid City, SD 888-672-1225 • College Station, IX 888-690-2218 Workorder Receipt Checklist Denison Mines USA Corp 111111/111111111111111111111111111111111111111111111111 C11 060151 Login completed by: Corinne Wagner Reviewed by: BL2000\kschroeder Reviewed Date: 6/8/2011 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? Samples in proper container/bottle? Sample containers intact? Sufficient sample volume for indicated test? All samples received within holding time? ContainerfTemp Blank temperature: Water -VOA vials have zero headspace? Water -pH acceptable upon receipt? Contact and Corrective Action Comments: None Yes 0" Yes 0" Yes 0 Yes 0" Yes 0" Yes 0" Yes 0" Yes 0" Yes 0" Yes 0" 2.2"C On Ice Yes 0" Yes 0" Date Received: 6/3/2011 Received by: dw 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 0 No 0 Not Present 0 Not Present 0 Not Present 0" No VOA vials submitted 0 Not Applicable 0 Page 32 of 33 Chai n of Custody and Analytical Request Record Page_'_of_i _ Company Name: De.n;~~t\ M:(\t/::. Report Mail Address: PO eO,"" ~Dq ~ttl..l\~~ (\,\ l)..\ g45 \l Invoice Address: .....,- ~~tY\e. Special Report/Formats: DDW o EDD/EDT(Electronic Data) D POTWIWWTP Format: ___ _ D State: ______ _ D Other: ____ _ o LEVEL IV o NELAC SAMPLE IDENTIFICATION Collection Name, Location, Interval, etc. Date 4 5'6+ 6 '"T(-; ~ ~ \"""K 7 T V'l'\A.O C> (C\ A.... Di 8 9 ""0 ~ 10 (1) -- Collection Time 1(;;,15 1450 113:S 11'35 01'150 PLEASE PRINT (Provide as much illiQrmation as possible.) Project Name, PWS, Permit, Etc. , I Sample Origin Ann"""t Seeps. o.nJ. Spl"'('I~S ;2.,011 State: 1...\'/ EPA/State Compliance: Yes [q' No 0 Contact Name: Phone/Fax: Email: Sampler: (Please Print) 'R~o...r. P",\mc.r 1../35 fag ~\ R~o.n 'Po..hYlU"' Invoice Contact & Phone: Purchase Order: Quote/Bottle Order: StAMe. ~ &I}i]&l1 W®D® [Ri[];®QD~§[]) .1 Contact ELI prior to RUSH sample submittal Shi~~i'x o ~O(f)~ ~1ll;gOI"" ._> 0>.,$ .l9 CJ) CJ) ro <U §>~ :g~ u> 0 <u Cl o«~I~I~ ~ ~~ § 'C: "'E~I'g~ ::I Cl>.=a> ~ Z "0..«10)0 ~ ~1 CJ) o ::r ...tJ -J ~ )!. o I ~ MATRIX 113 "w 'f. bW .':b. ~\N I~ k,W "f. bW y.. ·1 0 w I () « I-~ W W (j) i='" for charges and Cooler l!l(s): « R scheduling -See l h Q,Vtf t=-Instruction Page '0 ReceiptTemp t: Comments: ::J U ;;J..;}-0 °c '-ItI E On Ic,,: {0 ::J r-5 'E Custody Seal ItI On Bottle ~: '0 t: On Cooler ItI Ui H Intact y. N Signature Y N Match ~ !~ ~ ~ ~ ~1~l51 ~ ~ VJ Custody Received by (print): DatefTime: ~ \D30 _ . __ -Record Received by (print): Datemme: Signature: ~ M USTbe~------------------------------------,"~~~~~ __ ~~~~ ____ ~~~~~~~~ • "C€lve y a ra t:\,.~ Signed Sample Disposal: Return to Client: Lab Disposal: ..I~l ...... "(J...../ __ In certain circumstances, samples submitted to Energy Laboratories, Inc. may be subcontracted to other certified laboratories in order to complete the an-4~irrequested. This serves as notice of this possibility. All sub-contract data will be clearly notated on your analytical report. ~ Visrt our web site at www.energylab.com for addrtional information, downloadable fee schedule. forms. and links. TabE Quality Assurance and Data Validation Tables Table E-l Holding Time Evaluation "~J~t~t "T;,!~',' ' ,,,"'rl~': 1;(, ~l;,~~(~fi' , 1 ' ';"H' • If;: En~rance,l\1 vi( . , Cottonwood I ,II, ",'" w':': (11 Baok ", ,t~l:i', ... I' I" i \' ' I ,,' Westwater"i " ',. 'l 'Ruin Spring' l ", 'Ir-' " , Seep·May ;~pring'May' :. '!l", , , ,Seep. May , I': May .and ~ 1. t:t ,I..: 'J I,:~{rrp May,. .,;;'" ' ,:ii:;~:;iir~'~:flt:ft~fj1f~~:' '~~' l,,1 ,. ;,'-'/ . ( .' N{~ i .and JVly:f.l '\1_ ,I r~~{~Gnd )uJ(M;; IldJuly 20~t> li)'lland July , " ',. ,J; , " ~, .... 2.01,1" "",,,, :;f!l, '!ip 11 ';;'\\ • .. ";, ' ' Requjred Holdingi;:n~e I" 2Q,tl1;!:" '1 f.,' 2M;11! ,"I' ' 1,<tVif, 'P' Major Ions Carbonate 14 days OK OK OK OK OK Bicarbonate 14 days OK OK OK OK OK Calcium 6 months OK OK OK OK OK Chloride 28 days OK OK OK OK OK Fluoride 28 days OK OK OK OK OK Magnesium 6 months OK OK OK OK OK Nitrogen-Ammonia 28 days OK OK OK OK OK Nitrogen-Nitrate 28 days OK OK OK OK OK Potassium 6 months OK OK OK OK OK Sodium 6 months OK OK OK OK OK Sulfate 28 days OK OK OK OK OK pH (s.u,) N/A OK OK OK OK OK TDS 7 days OK OK OK OK OK 6 months (except mercury which is 28 Metals days) OK OK OK OK OK Radiologies 6 months OK OK OK OK OK VOCS (including THF) 14 days OK OK OK OK OK E-2 Laboratory Receipt Temperature Check Work Order-NutllberlLab' ,~"i" 'R .,', T ' , SetID ii f ,) ,eCylpt , eII).p EL -C11060151 2.2°C EL-C11070577 3.4°C AWAL -1106074 4.4°C AWAL -1107303 3.4°C E-3: Analytical Method Check -Routine Samples · /,,'\!'~',' .:t:~. . '.. " '. r:~·;i;;Zj!!·: ':a: ' :F;>kl'fij:' '~~:,.' . ii": ,,,' It '. {:: ""i, ·,gil". CC., , RI.\:M.et~od p&ed ?y~l'.~b ii'. " ;"} '\I .'!it;,~1 ~. "".' . I· ' .. ' QA~;~rmit M~thod "I'; I"'.;,.~ , I;' ,Parantder "ii" ,;" >".;. T;' . (May an~ July 2011) 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 E900.1 VOCs except Tetrahydrofuran SW8260B SW8260B Tetrahydrofuran SW8260C SW8260C Chloride A4500-Cl B A4500-Cl B Fluoride A4500-FC A4500-FC Sulfate A4500-S04 E A4500-S04 E TDS A2540 C A2540C Carbonate as C03, Bicarbonate as HC03 A2320B A2320B Calcium, Magnesium, Potassium, Sodium E200.7 E200.7 E-4 Reporting Limit Evaluation "'X} '; " ,.f"" . Paranieter , .. ,'\,' , ",~. , ' ; Ammonia (as N) Nitrate + Nitrite (as N) Metals ug/L Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc Gross Alpha VOCsug/L Acetone Benzene Carbon tetrachloride Chloroform Chloromethane MEK Methylene Chloride Naphthalene Tetrahydrofuran Toluene Xylenes Major Ions mg/L Chloride Fluoride Sulfate TDS Carbonate as C03, Bicarbonate as HC03 Calcium, Magnesium, Potassium, Sodium All analyses were reported to the required RLs unless noted in the text. " ;i;Perrnit-S'pedfied. 25 mg/L 10 mg/L 50 4 5 100 730 1300 11000 15 800 2 40 100 50 100 2 17000 30 60 5000 15 700 5 5 70 30 4000 5 100 46 1000 10000 1 4 1 10 Not Specified Not Specified RL :'i!' E-5: Trip Blank Evaluation All trip blanks for the 2011 sampleing program were nondetect. (.l,'t'; . "/ ' Blank ·1 ./:\Sampl~ 'Date i,/ PS ,e 'Laboratory "Resuit~ 1 5/31/2011 AWAL ND 2 7/13/2011 AWAL ND 3 5/31/2011 EL ND 4 7/13/2011 EL ND E 6 Duplicate Sample Relative Percent Difference Ruin Spring -May Back Spring Ruin Spring -J~ly Back Spring Major Ions (mg/I) (Duplicate of Ruin RPD % (Duplicate of Ruin 2011 Spring) - May 2011 2011 Spring) -J uly 2011 Carbonate <I <1 N/C I 2 Bicarbonate 241 245 1.6 239 236 Calcium 145 145 0.0 148 147 Chloride 25 18 32.6 44 27 Fluoride 0.45 0.45 0.0 0.5 0.49 Magnesium 30.6 30.3 1.0 31.1 30.9 Nitrogen-Ammonia <0.05 <0.05 N/C <0.05 <0.05 Nitrogen-Nitrate 1.7 1.7 0.0 1.6 1.7 Potassium 3.2 3.2 0.0 3.3 3.3 Sodium l iD 109 0.9 111 108 Sulfate 486 484 0.4 484 483 pH (s.u.) 7.66 7.69 0.4 8.14 8.1 TDS 942 943 0.1 905 9 11 Metals (ugll) Arsenic <5 <5 N/C <5 <5.0 Beryllium <0.5 <0.5 N/C <0.5 <0.05 Cadmium <0.5 <0.5 N/C <0.5 <0.05 Chromium <25 <25 N/C <25 <25 Cobalt . <10 <10 N/C <10 <10 Copper <10 <10 N/C <10 <10 Iron <30 <30 N/C <30 36 Lead <1.0 <1.0 N/C <1.0 <1.0 Manganese <10 <10 N/C <10 <10 Mercury <0.5 <0.5 N/C <0.5 <0.05 Molybdenum 16 16 0 17 17 Nickel <20 <20 N/C <20 <20 Selenium 11.8 12.4 5.0 10.2 9.7 Silver <10 <10 N/C <10 <10 Thallium <0.5 <0.5 N/C <0.5 <0.5 Tin <100 <100 N/C <100 <100 Uranium 9.35 9.1 7 1.9 8.63 8.28 Vanadium <15 <15 N/C <IS <15 Zinc <10 <10 N/C <10 <10 Radiologies (pCiIl) Gross Alpha <-0.3 <0.03 N/C <-0.05 <0.3 voq ,(ugIL) Acetone ND ND N/C ND ND Benzene ND ND N/C ND ND Carbon tetrachloride ND ND N/C ND ND Chloroform ND ND N/C ND ND Chloromethane ND ND N/C ND ND MEK ND ND N/C ND ND Methylene Chloride ND ND N/C ND ND Naphthalene ND ND N/C ND ND Tetrahydrofuran ND ND N/C ND ND Toluene ND ND N/C ND ND Xylenes ND ND N/C ND ND RPD >20%. RPD >20%. However the analyte concenrati.ons are less than 5 times the required detection limit. The QAP ~tates acceptance limits for RPDs between the duplicate and original fi~ld 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. N/C = Not Calculated. RPD % 66.7 1.3 0.7 47.9 2.0 0.6 N/C 6.1 0.0 2.7 0.2 0.5 0.7 N/C N/C N/C N/C N/C N/C N/C N/C N/C N/C 0 N/C 5.0 N/C N/C N/C 4.1 N/C N/C N/C N/C N/C N/C N/C N/C N/C N/C N/C N/C N/C N/C NS -Westwater Seep was dry and not sampled July 2011 NC = Not Calculated. Value was not calculated because the sample result was nondetect. NA = Not Applicable. E-8: Laboratory Matrix QC Matrix Spike % Recovery Comparison CI1070577 N/A Molybdenum* NC NC 70-130 CII070577 N/A Uranium* NC NC 70-130 CII070577 Entrance Seep Napthalene 66 79 70-130 CII070577 N/A Selenium 88 59 70-130 Cll060151 Westwater Seep Silver 55 61 70-130 Cll060151 Westwater Seep Tin 57 58 70-130 NA = MS samples were not Denison samples. *= Recovery was not calculated as the analyte level in the sample was greater than 4 times the spike level. Surrogate % Recovery All sun-ogate recoveries were within acceptable limits. MethodlLaboratory Reagent Blank detections I '. .'i; \ ", "'\,c' . A":. .;;e",,' fl.', ';1. ,,,,,)I\\'Lab ~epor.t1~.~ I~, W,elllSample' ~\ 11:;;: ';, .i~i·ii ~.naly.~e ~Ii(\ I' ", Cll070577 MB Alkalinity C11070577 MB Bicarbonate C11070577 MB Mercury CI1070577 MB Zinc CII060151 MB Alkalinity CII060151 MB Bicarbonate C11060151 MB Fluoride C11060151 MB Nickel Cll060151 MB Silver CI1060151 MB Zinc " Rt;ported ' '. ,::<::o~jlentt~!fon . 2.11 mg/L 2.58 mg/L 0.0369 ugiL 0.445 ugiL 2.23 mg/L 2.72mglL 0.04 mglL 0.1 ug/L 0.1 ug/L 0.09 ug/L 'Reporting ~ sli'Limit ,} j ~:j j --:;'/' ','I 5.0 mg/L 1.0 mg/L 0.5 ugiL 10.0 ug/L 5.0 mglL 1.0 mg/L 0.10 mg/L 20 ug/L 10.0 ug/L 10.0 ug/L NC NC 19 7 10 1.6 TabF CSV Transmittal Kathy Weinel From: Sent: To: Cc: Subject: Attachments: Mr. Lundberg, Kathy Weinel Friday, November 04, 2011 2:05 PM 'rlundberg@utah.gov' 'Dean Henderson'; Jo Ann Tischler; David Frydenlund; Harold Roberts Transmittal of CSV Files White Mesa Mill 2011 Seeps and Springs Monitoring 110730-EDD CSV.csv; 11 06074-EDD CSV.csv; C11 060151.CSV; C11070577.CSV Attached to this e-mail are electronic copies of laboratory results for annual seeps and springs monitoring conducted at the White Mesa Mill during 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 TabG DRC Correspondence Regarding Annual Seeps and Springs Reports and Data Use State of Utah GARY R. HERBERT Governor GREG BELL Lieutenallt Governor CERTIFIED MAlL Department of Environmental Quality Amanda Smith Executive Director DNISION OF RADIATION CONTROL Rusty Lundberg Director RECEIVED August 30, 2011 imTURNED RECEIPT REQUESTED Mr. David C. Frydenlund Vice President, Regulatory Affairs and Counsel Denison Mines (USA) Corp. (DUSA) Independence Plaza, Suite 950 1050 Seventeenth Street Denver, CO 80265 RE: Ground Water Quality Discharge Pemilt Number UGW370004: 2009 and 2010 Annual Seep and Springs Sampling Report Closeout Letter Dear Mr. Frydenlund: The Utah Division of Radiation Control (DRC) has completed the review of the 2009 and 2010 Annual Seep and Springs Sampling Reports. The review was based on compliance with the Ground Water Quality Discharge Permit Number UGW370004 (Permit). The items reviewed were found to be conducted in compliance with the Pernrit. This letter constitutes a closeout of the 2009 and 2010 Annual Seep and Springs Sampling Reports. Thank you for your cooperation in this matter. If you have any questions or comments regarding this letter, please contact Dean Henderson at (801) 536-0046. UTAH WATER QUALITY BOARD ~ Co-Executive Secretary RLlDH 195 North 1950 West· Salt Lake City, UT Mailing Address: 1'.0. Box 144850' Salt Lake City, UT 84114-4850 Telephone (801) 536·4250 • Fax (801) 533-4097 • T.D.D. (80 I) 536-4414 www.deq.Ulflh R()V Printed.oll 100% rcoyded paper Kathy Weinel From: Sent: To: Subject: Ryan Palmer Thursday, November 03, 2011 4:56 PM Kathy Weinel; N. Tanner Holliday; Garrin Palmer Fwd: seeps and springs sampling Sorry Ryan for not getting back to earlier, I have been out of the office. Yes you may use the west water sample collected in May for the annual seep and springs sampling for 2011. Please also include in the report the analytical data from the other seep and springs samples collected in May 201l. Thanks Dean »> Ryan Palmer <RPalmer@denisonmines.com> 10/3112011 7:54 AM »> Dean, I was wondering if you have a copy or ever sent a copy of written permission allowing us to use the west water seep sample collected in May since it was dry when we attempted to collect samples from it during your visit/ split sampling of seeps and springs. Ryan Palmer Environmental Tech t: 435-678-2221 x1021 f: 435-678-2224 6425 S. Highway 191 PO Box 809 Blanding, UT, US, 84511 DENISON MINES (USA) CORP www.denisonmines.com This e-mail is intended for the exclusive use the of person(s) mentioned as the recipient(s). This message and any attached files with it are confidential and may contain privileged or proprietary information. If you are not the intended recipient(s) please delete this message and notify the sender. You may not use, distribute print or copy this message if you are not the intended recipient(s). Ryan Palmer Environmental Tech t: 435-678-2221 x1021 f: 435-678-2224 6425 S. Highway 191 PO Box 809 Blanding, UT, US, 84511 DENISON MINES (USA) CORP www.denisonmines.com This e-mail isintendedfortheexciusiveusetheofperson(s)mentionedastherecipient(s).This message and any attached files with it are confidential and may contain privileged or proprietary information. If you are not the intended recipient(s) please delete this message and notify the sender. You may not use, distribute print or copy this message if you are not the intended recipient(s). 1