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Home My WebLink AboutDRC-2012-002398 - 0901a068803251d0DRC-2012-002398 Energy Fuels Resources (USA) Inc. 225 Union Blvd. Suite 600 Lakewood, CO, US, 80228 303 974 2140 www energyfuels com Sent VIA Federal Express November 21,2012 Mr Rusty Lundberg Director Utah Water Quality Board Utah Department of Environmental Quality 195 North 1950 West PO Box 144810 Salt Lake City, UT 84114-4820 Re: Transmittal of Annual Seeps and Springs Monitoring Report 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 2012 as required by the Groundwater Quality Discharge Permit UGW3 70004, as well as two CDs each containing a word searchable electronic copy of the report If you should have any questions regarding this report please contact me Yours ENyBcpTi^ELS RESOURCES (USA) INC. David C. Frydenlund Senior Vice President, Regulatory Affairs and General Counsel CC Jo Ann Tischler Harold R. Roberts David E. Turk Kathy Weinel Sent VIA Federal Express November 21,2012 Mr. Rusty Lundberg Director Utah Water Quality Board Utah Department of Environmental Quality 195 North 1950 West P.O. Box 144810 Salt Lake City, UT 84114-4820 Energy Fuels Resources (USA) Inc. 225 Union Blvd. Suite 600 Lakewood, CO, US, 80228 3039742140 www.energyfuels.com Re: Transmittal of Annual Seeps and Springs Monitoring Report 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 2012 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. EN ELS RESOURCES (USA) INC . . Frydenlund Senior Vice President, Regulatory Affairs and General Counsel CC: Jo Ann Tischler Harold R. Roberts David E. Turk Kathy Weinel White Mesa Uranium Mill 2012 Annual Seeps and Springs Sampling Report State of Utah Groundwater Discharge Permit No. UGW370004 Prepared by: Energy Fuels Resources (USA) Inc. 225 Union Blvd., Suite 600 Lakewood, CO 80228 November 21, 2012 Contents 1.0 INTRODUCTION ................................................................................................................................... 1 1.1 Sampling Plan Revisions ..................................................................................................................... 1 2.0 SAMPLING EVENTS ............................................................................................................................ 1 2.1 June 2012 Sampling ............................................................................................................................ 1 2.3 Repeat Visits to Dry Seeps and Springs .............................................................................................. 1 2.4 Sampling Procedures ........................................................................................................................... 2 2.5 Field Data ............................................ : ............................................................................................... 3 2.6 Field QC Samples ................................................................................................................................ 3 3.0 SEEPS AND SPRINGS SURVEY AND CONTOUR MAP .................................................................. 3 4.0 QUALITY ASSURANCE AND QUALITY CONTROL ..................................................................... .4 4.1 Laboratory Results .............................................................................................................................. 4 4.2 DATA EVALUATION ....................................................................................................................... 4 4.3 Adherence to Sampling Plan and Permit Requirements ...................................................................... 5 4.4 Analyte Completeness Review ............................................................................................................ 6 4.5 Data Validation ................................................................................................................... : ............... 6 4.5.1 Field Data QAlQC Evaluation ..................................................................................................... 6 4.5.2 Holding Time Evaluation ............................................................................................................. 6 4.5.3 Laboratory Receipt Temperature Check ............................................................................... ; ...... 6 4.5.4 Analytical Method Check ............................................................................................................. 6 4.5.5 Reporting Limit Evaluation .......................................................................................................... 6 4.5.6 Trip Blank Evaluation .................................................................................................................. 7 4.5.7 QAlQC Evaluation for Sample Duplicates ................................................................................... 7 4.5.8 Radiologies 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 .......................................................................................................................... 11 6.0 CORRECTIVE ACTION REPORT ............... ; ..................................................................................... 11 6.1 Assessment of Corrective Actions from Previous Period ................................................................. 11 7.0 ELECTRONIC DATA FILES AND FORMAT ................................................................................... 12 8.0 SIGNATURE AND CERTIFICATION ............................................................................................... 13 11 N:\WMM\Required Reports\Seeps and Springs Sampling Report\2012\2012 Annual Report -text.dOCX LIST OF TABLES Table 1 Summary of Seeps and Springs Sampling for 2012 Table 2A Detected Constituents and Comparison to Historic Values and Mill Site Monitoring Wells -Ruin Spring Table 2B Detected Constituents and Comparison to Historic Values and Mill Site Monitoring Wells -Cottonwood Seep Table 2C Detected Constituents and Comparison to Historic Values and Mill Site Monitoring Wells -Westwater Seep Table 2D 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-1 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 Radiologies 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 111 N:\WMM\Required Reports\Seeps and Springs Sampling Report\2012\2012 Annual Report -text.dOCx 2012 ANNUAL SEEPS AND SPRINGS SAMPLING REPORT 1.0 INTRODUCTION This is the 2012 Annual Seeps and Springs Sampling Report for the Energy Fuels Resources (USA) Inc. (formerly Denison Mines (USA) Corp.) ("EFRI") 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 2011 sampling event, EFRI used the 2011 Draft Sampling Plan field forms for the July 2011 sampling event and the June 2012 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 2011 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 June 2012 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 June 20, 2012, EFRI collected seeps and springs samples from Cottonwood Seep, Ruin Spring, Back Spring (duplicate sample of Cottonwood Seep), and Entrance Spring. The DRC representative collected a "split" sample on June 20, 2012 at Cottonwood Seep from the EFRI sampling equipment, using sample containers he provided. Corral Canyon Seep, Westwater Seep, and Corral Springs were all dry on June 20,2012. All of the data from the June sampling event are included as Attachment D in this report. 2.3 Repeat Visits to Dry Seeps and Springs. During the June 20, 2012 sampling event, Westwater Seep, Corral Canyon Seep and Corral Springs were dry, could not be sampled, and did not warrant development attempts with limited 1 N:\WMM\Required Reports\Seeps and Springs Sampling Report\2012\2012 Annual Report -text.dOCx hand tool excavation at that time. Additional visits were made to these locations on June 27, 2012 and July 9, 2012 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 June sampling event, 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 DRC-approved sampling procedures for seeps and springs at the Mill are contained in Sampling Plan, Revision O. Samples collected under this plan were collected either by direct collection which involves collecting the sample directly into the sample container from the surface water feature or from spring out-flow, or by using a stainless steel ladle to collect water until a sufficient volume is contained in the ladle for transfer to the sample bottle. Sampling Plan Revision 0, was revised in 2011 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. EFRI 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. EFRI determined a revision to Sampling Plan, Revision 0 was necessary, because the procedures in 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. EFRI submitted a Draft Sampling Plan to DRC in 2011. The procedures in the Draft Sampling Plan are consistent with the sampling procedures employed in 2010 and 2011. Samples collected under this plan are collected by direct collection, stainless steel sample ladle, or by use of a peristaltic pump which involves collecting the sample from the source or out-flow using the peristaltic pump. The peristaltic pump is used to deliver the sample from the source or out-flow to the sample bottles. Filtered parameters are pumped through a 0.45 micron filter prior to delivery to the sample bottle. EFRI employed the previous sampling procedures again in 2012, because the 2010 and 2011 Annual Seeps and Springs Sampling Reports for the Mill were inspected by DRC and determined to be in compliance with the GWDP. Additionally, DRC was present during the 2010, 2011, and 2012 sampling events and did not provide comments noting that the procedures used were unacceptable. Since DRC has not commented on the seeps and springs sampling procedures that were used in 2010 and 2011, EFRI has continued using the procedures implemented in 2010. Ruin Spring In the case of Ruin Spring, sample bottles for all analytes during the June sampling event (except gross alpha and heavy metals) were filled directly from the spring out-flow which is a pipe. Samples for heavy metals and gross alpha were collected by means of a peristaltic pump 2 N:\WMM\Required Reports\Seeps and Springs Sampling Report\2012\2012 Annual Report -text.dOCx 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. Cottonwood Seep and Entrance Spring For the June 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 lower prior to laboratory analysis. Samples were received by the Mill's contract laboratories, Energy Laboratories ("EL") at 2.2° C and America West Analytical Laboratories ("A WAL") at 4.5° C. 2.5 Field Data Attached under Tab A are copies of all of the field data sheets recorded in association with the June 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-l, 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 perched water level contouring, 3 N:\WMM\Required Reports\Seeps and Springs Sampling Report\2012\2012 Annual Report -text.dOCx because there is no evidence to establish a hydraulic connection between Cottonwood Seep and the perched water system. Cottonwood Seep is located near the Brushy Basin Member/Westwater Canyon Member contact, approximately 230 feet below the base of the perched water system defined by the Burro Canyon Formation/Brushy Basin Member contact. The stratigraphic position of Cottonwood Seep indicates that its elevation is not representative of the perched potentiometric surface. Exclusion of the Cottonwood Seep from water level contouring 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 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 December 2009 and July 2010 seeps and springs survey data shown in Tab C will be used in all reporting where seeps and springs locations and elevations are relevant. A full discussion of the 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 Chem, Inc. and submitted to the Director on November 15, 2010. Additional information is also contained in the Second Revision Hydrogeology of the Perched Groundwater Zone in the Area Southwest of the Tailings Cells While Mesa Mill Site, dated November 7, 2012, prepared by Hydro Geo Chem, Inc. and submitted to the Director on November 7,2012. 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 QAlQC 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"), Revision 7.2, dated June 6, 2012, the approved Sampling Plan and the Permit itself. To meet this requirement the data validation 4 N:\WMM\R.equired Reports\Seeps and Springs Sampling Report\2012\2012 Annual Report -text.dOCx 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 QAlQC 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 4.5.1. 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 QAlQC are discussed in Sections 4.5.1 through 4.5.9 below. The analytical laboratories have provided summary reports of the analytical QAlQC measurements necessary to maintain conformance with National Environmental Laboratory Accreditation Conference ("NELAC") certification ' and reporting protocol. The analytical laboratory QAlQC Summary Reports, including copies 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, 2011, and 2012 sampling events. DRC has not provided comments on the Sampling Plan to date; however, the DRC representative was present for both the 2010, 2011, and 2012 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. The Permit only requires the measurement of the field parameters pH, conductivity and temperature. Field parameter measurements collected during this sampling event included pH, conductivity, temperature, redox potential, and turbidity. The collection of additional field parameters resulted in no effect on the usability of the data. 5 N:\WMM\Required Reports\Seeps and Springs Sampling Report\20 12\20 12 Annual Report -text.dOCX 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. 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 to be equal to or lower than 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 6 N:\WMM\RequiredReports\Seeps and Springs Sampling Report\2012\2012 Annual Report -text.dOCx specified in Part I.E.6.e).(1) were used. Those reporting limits are 10 mg/L for TDS, and 1 mg/L for Sulfate and Chloride. 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 V OCs. 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 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 Cottonwood Seep/Back Spring duplicate pair. 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. Per QAP, Revision 7.2, and in response to requests from UDEQ, a separate corrective action for duplicate RPDs outside of acceptance limits has been developed and is documented in the revised QAP. The revised procedure for duplicate results outside of acceptance limits was implemented for the chloride results in duplicate pair Cottonwood Seep/Ruin Spring. The corrective actions that were taken in accordance with the revised procedure are as follows: the QA Manager contacted the Analytical Laboratory and requested a review of the raw data to assure that there were no transcription errors and the data were accurately reported. The laboratory noted that the data were accurate and reported correctly. Reanalysis was not completed as the samples were beyond the holding time. Corrective actions were followed per QAP, Revision 7.2, and no formal correct action will be provided. 7 N:\WMM\Required Reports\Seeps and Springs Sampling Report\2012\2012 Annual Report -text.dOCx 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, EFRI'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. A significant number of the seeps and springs samples had the reporting limit raised for Sulfate due to matrix interference andlor 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. 8 N:\WMM\Required Reports\Seeps and Springs Sampling Report\2012\2012 Annual Report -text.dOCX • 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 MS/MSD (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 MS/MSD pair be prepared on EFRI samples only. Acceptance limits for MS/MSDs are set by the laboratories. The review of the information provided by the laboratories in the data packages verified that the QAP requirement to analyze a MS/MSD pair with each analytical batch was met. While the QAP does not require it, the recoveries were reviewed for compliance with 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 MS/MSDs recoveries and the associated RPDs for all seeps and springs samples were within acceptable laboratory limits except as noted in Tab E. Five MS/MSD recovery RPDs were are outside the laboratory established acceptance limits. This result does not affect the quality or usability of the data because the recoveries and RPDs above or below the acceptance limits are indicative of matrix interference. Four MS/MSD recoveries were above the laboratory established acceptance limits, indicating a high bias to the individual sample results. A high bias means that reported results may be higher than the actual results. Two MS/MSD recoveries were below the laboratory established acceptance limits. The recoveries do not affect the quality or usability of the data because the recoveries outside of the acceptance limits are indicative of matrix interference. Furthermore, the MS/MSD analyses samples for Carbon Tetrachloride, Chloromethane, and Toluene which were spiked for analyses were not collected at the Mill, and as such the matrix interference is not applicable to the Mill samples reported herein. The QAP requirement to analyze a MS/MSD pair with each analytical batch was met and as such the data are compliant with the QAP. The 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 except as indicated in Tab E. Sixteen surrogate recoveries were above the laboratory established acceptance limits, indicating a high bias to the individual sample results. A high bias means that reported results may be higher than the actual results. The surrogate compounds outside of acceptance limits are most likely the result of laboratory spiking compound degradation. This is apparent because the same compounds were out compliance limits in all samples analyzed within a specific period of time. There is no effect on the quality or usability of the data, because the low surrogate recoveries were on a laboratory matrix spike which would indicate surrogate solution degradation at the laboratory. These recoveries do not impact other results, because 9 N:\WMM\Required Reports\Seeps and Springs Sampling Report\20 12\20 12 Annual Report -text.dOCx there are multiple surrogates added to each sample and all other surrogates were within limits. Furthermore, there are no QAP requirements for surrogate recoveries. 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 specified process for evaluation of reagent/method 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) of each sample was measured and recorded in the field. The samples were not analyzed for semivolatile organic compounds. Although the Sampling Plan, Revision O,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 June 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, 2010, and 2011 data to the 2012 data shows that the concentrations of most detected analytes remained approximately the same with only minor ohanges within the limits of normal analytical deviation. The reported values for fluoride, 10 N:\WMM\Required Reports\Seeps and Springs Sampling Report\2012\2012 Annual Report -text.dOCx magnesium, potassium, sodium, total dissolved solids ("TDS"), selenium, and uranium increased from the 2011 sample results, but they are below 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 uranium having a positive detection. A comparison of the 2009, 2010, and 2011 data to the 2012 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 bicarbonate, calcium, chloride, magnesium, potassium, sodium, and TDS increased from the 2009, 2010, and 2011 sample results. In most cases the increases were minimal and within the range of analytical deviation (e.g. potassium increased 0.3 mg/L). In all cases the detections are significantly below the upper range of historic values for the on-site monitoring wells. 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 Westwater Seep was dry and no sample was collected. 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, selenium, and uranium having positive detections. A comparison of the 2009, 2010, and 2011 data to the 2012 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 calcium, chloride, fluoride, magnesium, nitrate, sodium, TDS, selenium, and uranium increased from the 2009, 2010, and 2011 sample results. Gross alpha was reported; however, the result has decreased compared to the 2011 results. 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 surface water sample with no indication of Mill influence. 6.0 CORRECTIVE ACTION REPORT No corrective action reports are required for the 2012 annual sampling event. 6.1 Assessment of Corrective Actions from Previous Period No corrective action reports were required for the 2011 annual sampling event. 11 N:\WMM\Required Reports\Seeps and Springs Sampling Report\2012\2012 Annual Report -text.dOCx 7.0 ELECTRONIC DATA FILES AND FORMAT EFRI has provided to the Director electronic copies of all laboratory results as part of the annual seeps and springs monitoring in Comma Separated Values ("CSV"), from the laboratory. A copy of the transmittal e-mail is included under Tab F. 12 N:\WMM\Required Reports\Seeps and Springs Sampling Report\2012\2012 Annual Report -text.dOCX 8.0 SIGNATURE AND CERTIFICATION This document was prepared by Energy Fuels Resources (USA) Inc. on November 21,2012. By: yd lund Senior Vice President, Regulatory Affairs and General Counsel 13 N:\WMM\Required Reports\Seeps and Springs Sampling Report\2012\2012 Annual Report -text.dOCx 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 i formation submitted is, to the best of my knowledge and belief, true, accurate, and co am aware that there are significant penalties for submitting false information, includi ssibility of fine and imprisonment for knowing violations. Da . Fry Senior Vice President, Regulatory Affairs and General Counsel Energy Fuels Resources (USA) Inc. 14 N:\WMM\Required Reports\Seeps and Springs Sampling Report\20 12\20 12 Annual Report -text.dOCX Tables Table 1: Summary of Seeps and Springs Sampling for 2012 '.-, ~ -, IqQcatiolt" c' , '< . SampI~ Date Work Order No~lLab SefJD Date of'Lab Report EL = C1206931 EL = 7/27/2012 Entrance Spring 6/20/2012 AWAL = 1207214,1206379 AWAL = 7/3/2012, 7/23/2012 EL = C1206931 EL = 7/27/2012 Cottonwood Seep 6/20/2012 AWAL = 1207214, 1206379 AWAL = 7/3/2012,7/23/2012 Back Spring (Duplicate of EL = C1206931 EL = 7/27/2012 Cottonwood Seep) 6/20/2012 AWAL = 1207214, 1206379 AWAL = 7/3/2012,7/23/2012 EL = C1206931 EL = 7/27/2012 Ruin Spring 6/20/2012 AWAL = 1207214, 1206379 AWAL = 7/3/2012,7/23/2012 Westwater Seep Not Sampled -Dry Not Sampled -Dry Not Sampled -Dry Corral Spring Not Sampled -Dry Not Sampled -Dry Not Sampled -Dry Corral Canyon Spring Not Sampled -Dry Not Sampled -Dry Not Sampled -Dry ~ Table 2A Detected Constituents and Comparison to Historic Values and Mill Site Monitoring Wells ","" ~ ., ,,,,i:'~ '2~ ,~ .. ':;;'''l. l .~,;;'~~'l! "' Ruin S~Fing .j, 7q" , .Ill. 'K ri ":...;..' .~ -., " ';7 'rr" ':: '.,~ ". . ,:~,i' ~ Jll 7f: Range of Kverrage ,Itt,: ,7 . . 'i' I, , .:.0 I .. I ' . Historic. Values for Ave 2003-I.J "11>' IIi:/" . k' . ,iii I, C.onstituent ;, 2009,; . 2010 I" 2011 -. May 2011 -July ' 2012· !' Monitoring Wells 1 * 2004~," " .. ~ = J' '.' "«'cy ",. "jJ 'if !', : MaJor'lons ~mg;I~ , -"I J !;'>'; r." 'f. ",.~, ~ .:: .. : ~l.\:~~ Carbonate <1 <1 <1 1 <1 ._-.. 1~..rJ Or. ~ . (' , 7 . .,. --.~l r. _~ Bicarbonate 233 254 241 239 237 --\e, lFli 0' _::-1lJ " Calcium 151 136 145 148 147 Ii" '" --.. ; '.' .~:~" 'i' '~1~! Chloride 28 23 25 44 28 ·f .. ND -213 '" 27 ~ ., , .. Fluoride 0.5 0.53 0.45 0.5 0.52 I:~ . ND -1.3 ',SI'/' ~. G.o 'fl{, 1.,,0'· Magnesium 32.3 29.7 30.6 31.1 31.9 ' ~;~ "; cr ,~. 1/ -to ~:-. -~~ , .. Ammonia 0.09 <0.05 <0.05 <0.05 . '-ND ----~:' -~ ,. Nitrogen-Nitrate 1.4 1.7 1.7 1.6 1.6 7 -b' , "'" ,"Y. Potassium 3.3 3.07 3.2 3.3 3.5 Ii . '" --< , .. w __ • .,. ," ' '" .J. " Sodium 104 93.4 110 111 115 . c, -- 'c'. 1!i ;" " ' •• W ' . Sulfate 528 447 486 484 464 I,;c. ND -3455 5~'1 -" pH (s.u.) 7.85 7.51 7.66 8.14 7.53 I~ 6.'7'-8.9: ,,' 0.9 .;,; ..• : ' , "" . ~ TDS 1010 903 942 905 1000 ~ 1019 -5548 I, ~i 1053 .'<. I., ,,' Meta,Is·(uglI) • '1 ,CTt: . .. C" ';> Arsenic <5 <5 <5 <5 <5 ·~ .. rIl --, ~" )! --,.,:\,:;;, Beryllium <0.5 <0.5 <0.5 <0.5 ~ ~ '~,,'%' <0.5 --E. N -" ~!Il' Cadmium <0.5 <0.5 <0.5 <0.5 <0.5 ;';;. Nt) :·~4.72 , 0.01 ." x ~' Chromium <25 <25 <25 <25 <25 '" ---'iIl I~ ~ ,,', -Ji' .", :,j, ,. -~8 "if.- Cobalt <1 0 <10 w " <10 <10 <10 ---- 'C' ,; Copper <10 <10 <10 <10 <10 ."' --, '",ii o;::~ , ~ Iron <30 <30 <30 <30 <30 ';!i' '1 NJ? -7~4.2 "' . .;;"' 2~ Lead <1.0 <1.0 <1.0 <1.0 <1.0 --r . ., Manganese <10 <10 <10 <10 <10 ND .. 34,550 -@:-'m .5 ',,' Mercury <0.5 <0.5 <0.5 <0.5 <0.5 Ill' --i'" . ~1;-"'ilf~' , I "l'.tl · 10 " '" i~ l;~ Molybdenum 17 17 16 17 16 .'!§ " "r, --"';' """ . ,e . <><" '" .' "'. ;,., ... Nickel <20 <20 <20 <20 <20 ~t ;,~[,":l' ND -01 ... .c' . I·i"'· (iU)'S -" :_R Selenium 12.2 10 ',1 ;11' ' 12.J 11.8 10.2 10.8 I~," ;i,.ND -It(')(9,5 i<'.\~ '1:,1,,--. ~ ::: ;" Silver <10 <10 <10 <10 <10 I" $~ it .i!l __ --"'" !:! i'c," 0 ,~. ," Thallium <0.5 <0.5 <0.5 <0.5 <0.5 i ~' ,~ ~f .. ~. (I: :;;~:~Ii\,< ... ~. " Tin <100 <100 <100 <100 <100 «5.0)** I" .. :;:;;--~ --' . ",' . '''',w ill ,', . Jl. "'ii·, .;; Uranium 9.11 8.47 8.63 8.68 r,;< ND .. )'~~8 i' 10 · u 9.35 " .~ , Vanadium <15 <15 <15 <15 <15 '~::~ ~"!.. 'It '" ~~\0~ ;70 :' __ Ii: .~.~ 'j; . .,,," """ Zinc <10 <10 <10 <10 <10 ..•. , --';';'.f "I :"~, . " " " "i'l~f.·';;';:',· .,' / ... " -~ r~ R,2!diolbgics (pC ill) .i' ~~.'3] :~ , d' '.? ,~ . ,. <~ • ,#,. ;. .,., . . "-I~ i\1 ,. " ,"'" . , Gross Alpha <0.2 <0.2 <-0.3 <-0.05 <-0.09 :~~; ';"~ JffD ~~~'6 " .;f·'lt:" (}).28' '-fI(' ", ·.i: ' ~~\ It'-.:rW . -'i. .~ . "'r! ..~ -c {. ., Ii ::i", .. ~ ;,~\ '" \i.}f ,yq,CS (u.g/'L) .. " , :it . Of: ii .. , ~,\ • ,,~' ::.;. ~.~,~, ',,,' .. ,,!~ JI, -",!& -',;I' Acetone <20 <20 ND ND I?-f . ~ _]i, . cc-;: ND '£i;, ~.; .. ~;'" ,."-\J,l --- Benzene <1.0 <1.0 ND ND ND ~ll~k,:!i~t:~;tr~t: _.:~ JJ,r'.' 1,7.· .• ".' . ':~ ','B ""l( '1'" "j~'iII ... ~.. !''li'.' f~ tetrachloride <1.0 <1.0 ND ND ND I~f~;~~'" ' ,~ '(; ,-Ii; ,. ':;~;;!{u ill! ,~.3"j).W.~ :.-i,., . ' . ---'~'~: IJ,'" » .. "), ,,~,~ Chloroform <1.0 <1.0 Chloromethane <1.0 <1.0 ND ND ND MEK <20 <20 ND ND ND Chloride <1.0 <1.0 ND ND ND Naphthalene <1.0 <1.0 ND ND ND Tetrahydrofuran <1.0 <1.0 ND ND ND Toluene <1.0 <1.0 ND ND ND Xylenes <1.0 <1.0 ND ND ND 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. 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, 200S (MW-1, MW-2, MW-3, MW- 3A, MW-4, MW-S,MW-11, MW-12,MW-14, MW-1S, MW-17, MW-1S, 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) 2 **In June 2012, the samples collected were inadvertently analyzed twice for Tin only. Both results are shown, and both data packages have been included in this report. Table 2B Detected Constituents and Comparison to Historic Values and Mill Site Monitoring Wells ""~ , " , " ' n ' I,'" rlfa .. <,,, ~~~ , ,~ I~ '.-"'. ' .. ' 'ri';~, "~-, _ Ill. "', ,if~ ,O! [~ C2ttonw~o~~§~e)p '" 'I ,i. .. , ,.,' . ,~ ~ ~', ,.;il' )li' 'f': ~'!il ,~ ,"" ':1 Ii· ,'-.r ,,' ) ',. .'. ~i~, 'n; " '~/~. ': ~!'" ... '., .. ," , ,-~' I,," '-' \1 ~' '. 'r'" . ,; 1'5 I~ " Range of Average ',- 1 " 8', , Historic Val,:,es for k: A \Ie 1977 -""" , ,',i~' ~t 2009 I!!. ~,011);; ~aYUl . 201t ;. J;uly !:< ,:" iM~nit9ring Wells1* ' Constituent I~":iii ' ,20]0 ";F' !;i& .. 2012 ,~ ',,(};_ t982 1 ~ !lI,~, ;r. ~ -~ajor Ions (mgt!) ,Ii "' ~~,~ .~ , ,', , ,~ h~ ," , Carbonate <1 <1 <1 6 <1 'i' --,.I Ii!! --I:il , I'~ ~. '", Bicarbonate 316 340 " ,,;;' ,. I!~-" 330 316 326 ", ,1:, , ;'!'II! ,:~ ]Il , --"'c "'," Calcium 90.3 92.2 95.4 94.2 101 I,;:; ,,-~;;: ~ I~ --.c. ~'i . Chloride 124 112 113 134 149 ND -21S ~ 31 ~.ij I~ .: Fluoride 0.4 0.38 0.34 0.38 0.38 I~'.~, NO -1:3 .~ It,-rIj'1t? 8 . 'if .•.. ,j . " "', 'J '11;"" Magnesium 25 24.8 25.2 25.2 27.7 .. ' ... ?: ~ ii; I~; ~". --::' ! " 'c, , " ," .... "~ .. <~ Nitrogen-Ammonia <0.05 <0.05 <0.05 <0.05 <0.05 :!l ~ ~ I~ --~ " , , .... 7 '~ Nitrogen -Nitrate 0.1 <0.1 0.1 <0.1 <0.1 1,~$1 . ,~-~ ,~' "~l "I!: --'" ~ ... , Potassium 5.7 5.77 6 5.9 6.2 ~::-'ll~ ~' _I~: "",,-- !~ !l .Z# '. Sodium 205 214 229 227 247 ~ --",' ." I:' -., ':..- Sulfate 383 389 394 389 256 ND -3455 ~,I~ .~ 230 .,; ,i,;: '" pH (s.u.) 7.73 7.47 7.55 8.04 7.53 r 6.1, j~.9 11;; ,"', ~7.6 .~ ,'" ,< TDS 1010 900 1030 978 1040 1019 -5~48 lIP 811 ,Ii . '_' " " -ft." ;~M~t~l~ (ug/l) !l'~ "f ~~ ''"~' "~' ",' ,"-' " 8:'~c }'i . e ~jl' ." " ",: .' Arsenic <5 <5 <5 <5 <5 --T'ill" ' Ii; "~, ---"'.'" t"~ 'Ill .. ~' 1", - Beryllium <0.5 <0.5 <0.5 <0.5 <0.5 ~, u --1"\, ," , -j-q. Cadmium <0.5 <0.5 <0.5 <0.5 <0.5 ::if " ~-~?b '", --;;, '1 ,'1,,', I~ 2. II ,~ Chromium <25 <25 <25 <25 <25 --,!,! " If ,:~i ' __ '. -·Il. ' -ti" Cobalt <10 <10 <10 <10 <10 ---i>i, --' Copper <10 <10 <10 <10 <10 ill; -:or --I ,-' Iron <30 <30 53 <30 <30 NT) -7~,42 :;" '~ 150 -: ,,~ ,; i; , Lead <1.0 <1.0 <1.0 <1.0 <1.0 ~ ----:: --:~ - Manganese <10 <10 <10 <10 <10 NI) -3~,5~0 F -y;c' 5*0 " ;~ lilli, I~ , Mercury <0.5 <0.5 <0.5 <0.5 <0.5 "'-'''.il, .,;-I~ -~~.~ ~~~~ B'. .. I .. 'L'~' Molybdenum <10 <10 <10 <10 <10 1~ I" "',:1 ~ '" ' " Nickel <20 <20 <20 <20 <20 " " NiD -6i " ''''.~_~ !I .'" mic'p II< Itip --, 'i:,~f'" Selenium <5.0 <5.0 -y Nb -1~6.5 · . '~~" ';, <5.0 <5.0 <5.0 'II:: ---~ Silver <10 <10 <10 <10 <10 ~.'", I~ . ~ ~,; (j-'.;.""~' ", t:)) " !'it --,..;i, " ,fit, Thallium <0.5 <0.5 <0.5 <0.5 <0.5 I'W lfii ',: ~ "'a ';-_ ',~r:Jl :", I~ ~~'!_ --:' ;1 ,~ "i <100 h " Ji., n I;~~." rii ,""'&<J) <100 <100 I" '*i I:~ " Tin <100 <100 «5.0)** I.~' , "~ --, .. Uranium 8.42 8.24 7.87 8.68 8.17 ND -'59.8 ',' '-':--.J ,,p rtt ' ~~ Vanadium <15 <15 <15 <15 <15 I~il". ~ ',""~ _:..' ''0; . ~::~' '. "" ';(1\1,:: , Zinc <10 <1 0 <10 <10 <10 '~,~f --"'I', ,. ~" ". '-' , -,,:" --". -" ' .<J~' " ~ :R3djol~g,ifS(P(]JI) .if '6 ~ -;~. --',,, ' ", ',5" . ;~ ;.;, ,: -, Il, '], ' ,," ". -" ,~' "'i , ,', "e~ \ : £;, , , ,"" ,'':# '~ Gross Alpha <0.2 <0.2 <0.1 <-0.1 <-0.2 lr ND~~' ~. ~7.2 .,; ~!fj';' ,--I,,:;;i,yc I~ A~ ;. '~'1". ~l!.,j, fii , :" 'e' -, "'~, V()~S (ugIL) :,[ ," . ~ " "',' -:'~~ : it. , . \~ , "', " ' .w,. ' " J., .' , .n :::~: ~ "', ' ,1 ""ci Acetone <20 <20 ND ND ND :~'P ii "~f,~\~i!li .:l:f ,~'~~" "~~ ..' ,~ -;:-. ,~" --, . Fow", , , .'~" Table 2B Detected Constituents and Comparison to Historic Values and Mill Site Monitoring Wells ~~" 'I!'I ,~ 'Wi ' • • (J, '"'1Il . ~i' . ' " &! ~ ': r@_,:, .~ ;.i~:~ ~, q~t!0nw~od ,~eell 5: or; ".. """. '-" ,:, " . ,fO;: . ,",' ,',")1;_ ~'_i1I c..;~ .... ~, . , .... ~.~ . rJ,' ~r~i'" -'u, I:" "'-~ ,," '-Ii "iCq' I~' v ,. "."", ,N. 'if • """.' -, ·:ji , I' ;~ ~. Ii'll ., " ; '; It :;, . "~1 j.) Range of Average !' I~~ , I, .. ·.· : ~ ,~ 1"" ~ Historic V. alues fOf<>l! A¥e 1977·;.."~ 'd ' .. R·· , I, \~ 2011-May ~iOU -Jl,lIy " ~ ~ Constituent 2009 ,; 2010 20tZ. MO,oitoring Wells1,.. II 1982 1 10', , " ~ , Benzene <1.0 <1.0 ND ND ND It" ,I);v~ --1{tl r·)Q.t. ~~, ';0 ~Jlr " " tetrachloride <1.0 <1.0 ND ND ND ~"...., --'p.;~ --,e.; .. .,'" "., -~ Chloroform <1.0 <1.0 ND ND ND ' ~w.~, --{~I ~.., ~" :> --,' . -~ " ."," ~ _!. "'", Chloromethane <1.0 <1.0 ND ND ND 1'1 ~. -~!II.' ./1 g,;~,,! . ',.,; ,j: MEK <20 <20 ND ND ND ,,~£./, ~ -':'~ )' nLl~l ,; . "jr~'" :. ~ " Methylene Chloride <1.0 <1.0 ND ND ND ·"'l.,.tJi 7 , I~ " --,<f'" I·' ; , '" . ':i> %: Naphthalene <1.0 <1.0 ND ND ND '\.~ .,,' ~. _~ '1-\1, ,;' f ';-f':, ',d', .' 11ft" [L "<L'~ .,.. ,i' 'r" T etrahydrofuran <1.0 <1.0 ND ND ND ,.' -" .. ',,~.h )/ , ~ I' i -;;;, . .01 Toluene <1.0 <1.0 ND ND ND :r.~ ''; . __ if . . '(; ~~. ~r,. "i' "'.-''>I!' c, ",' Xylenes <1.0 <1.0 ND ND ND 'Ii --7ft": -- '" ~, c>c 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 Wellsfor 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-1, MW-2, MW-3, MW- 3A, MW-4, MW-5, MW-11, 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) **In June 2012, the samples collected were inadvertently analyzed twice for Tin only. Both results are shown, and both data packages have been included in this report. Table 2C Detected Constituents and Comparison to Historic Values and Mill Site Monitoring Wells I~'i " ,'"'' 1l1. '" WestWater Seep~' ..... : ¥c'ff.,. .. ",' ".'" . ""4 , : orr ~ ." ,. ,-. .~.'" ~~-L:"'" r.i!i< i~~'ii>,"""!, :rr V'.~>' 'c .,:~,~~." , ,'t ;"'i!,"i, .. • [i! . liP.' ;~~ ~, .. "= ,,:'l~ [-il, ' ,~~ ~ ,~,I ~~"" Range. of A ver~ge' I: . ~ ~. 'Historic Values for i.-, ,-~ii.f' '" . I' 'l'J' Z""O,tl -M~y 201~,,; July 2012 · M OJlJioring Wells! * .' 'Gonstituent .~ '~, ''f 2009. c.~t., fA., 2010 't"p, '~ " .. ~, . " . .t, • ,;0/ y . . Major Jons~~(mgll) ~ .. -. , "'Cl' " ~ 'J' ',' '~ ~ ~ '" ~' th Carbonate <1 <1 <1 "". " --~ . i, ,I'll.,., "- Bicarbonate 465 450 371 ." \ J~-"ci ''''~ il Calcium 191 179 247 -: --.i" --, - Chloride 41 40 21 rJir~ cA, ']~JD' _ 213 .," ';~i. Fluoride 0.7 0.6 0.54 ",:, .. ND -1.3 . ,. Magnesium 45.9 44.7 34.7 w'" ,~i t, '" '.1, ---~~~ · " Not Sampled -Not Sampled '~'''~ " , .:,.. Nitrogen-Ammonia <0.05 0.5 0.06 I 'x · ~ , Dry -Dry e " --,,', Nitrogen-Nitrate 0.8 <0.1 <0.1 :1F'.,: 0>' ,~;:;, ~~~.' . ,-'';' ,·"'8 . " ~ Potassium 1.19 6.57 3.9 ", " · i' .:" ". --''! Sodium 196 160 112 I~' .~ ".i?~;-" . ", Sultate 646 607 354 :-" NT}-34§5 ill' pH (s.u.) 8.01 7.38 7.2 i,i ;6.7-~.9 ,i. TDS 1370 1270 853 ,~ tpf9i;' 55Lf8 .; -/' il} ". , Metals (ugll) ~.~ .... -it ';\", i I 0: ll"li ~ ~ .. " .,-: I:[ Arsemc <5 <5 12.3 I,'" ", ~." -:' i":~" "f"f~ I)")" Beryllium <0.5 <0.5 0.91 I~ '" '!l'" .. ",' --, Cadmium <0.5 <0.5 0.9 I;', .. ,:, .~ -41."l~,/ 'Il' -.~" Chromium <25 <25 <25 I,: .. ~~J< . -- Cobalt <10 <10 <10 .~';'i, C, ,.IIJ',. ;;~-;~. '/ff,: Copper <10 <10 16 Ii> --t£~ .. ~ Iron 89 56 4540 I~)~ ~ ';" · i, .~, ~'" 794g,,~ !', iC, Lead <1.0 <1.0 41.4 I~" \" ,"" --' ~, 'C" Manganese 37 87 268 I~ '0; ND -34,550", Mercury <0.5 <0.5 <0.5 Not Sampled -Not Sampled ,', ,,--" -- Molybdenum Dry -Dry 1-' ,'" " '0 29 29 <10 ~; ---'" £ Nickel <20 <20 29 ., 'S , NJD -61' I:if" " Selenium <5.0 <5.0 <5.0 I' "P,' ' NJ? -106.5 'r:; Silver <10 <10 <10 'iel'" . 5:1,.,--',' ''t" '" Thallium <0.5 <0.5 <0.5 ~-. --" ,~ (c;> • .:''!!. --w cf:-'W". !r Tin <100 <100 <100 _1i!!'1iI .... : --~"""':, -1:; ie" '. Uranium 15.1 46.6 6.64 in !~ ~ }ID -5~.8 ... '.'" T ,~J, Vanadium <15 <15 34 ~{:' .' "",,",1 --f~ .'!l~ }~,~: ';::"7.;' , ~ i~'ll(!l < • Zinc <10 <10 28 ,'" ," ~~' :~ .. " '. ~ ,-, -;\, ';, -'i','.' ~,;": .. " ~ ','; ,."" I", /. ·',i" " ";:iF~ , . ~'i' . ;Ra(J;i~loglcs (pC-iii)' "1 ,~:, '1\1; ,.;r 'i~~ 1, , '""j1f't.,' ~,¥", ", ~'\'1I!',i"~,:(~~' :'S;;;, • lj. ,Iii' :'1: :s; '" ",,-;~ . .; "" if ,F 0.5 Not Sampled -Not Sampled ~ts', . Gross Alpha < -0.1 <0.3 Dry -Dry No' -36 " ~ " ,,' Table 2C Detected Constituents and Comparison to Historic Values and Mill Site Monitoring Wells ,Westwater. Seep Benzene <1.0 ND <1.0 <1.0 ND <1.0 <1.0 ND <1.0 <1.0 ND Not Sampled ., <20 <20 ND Not Sampled- <1.0 <1.0 ND Dry -Dry <1.0 <1.0 ND <1.0 <1.0 ND <1.0 <1.0 ND <1.0 <1.0 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-1, MW-2, MW-3, MW-3A, MW-4, MW-5, MW-11, MW-12, MW-14, MW-15, MW-17,MW-18, MW-19, MW-20, M W-22,MW-23, MW-24, MW-25, MW-26, MW-27, MW-28, MW-29, MW-30, MW-31 and MW-32) Table 2D Detected Constituents and Comparison to Historic Values and Mill Site Monitoring Wells ;J:l ,; '''ti " . ". ~ '" ")'. }.i'. ~\ ' '!Il'>' I ",: .' J;',. ~ f~ C>-~;;>!k . "",i. ", "".~ ,-.. .'!L '.; , .... ". ,~~.p~tranee Sp~?g ~' "''4( ;i;", " .,~ A>o ,.",-t •. ", 1'<" D' iii:< "" .. , , . ~;,-~ 5~' . ." .. ,,",' " "". '"oil-> . ~l ' '" lif' ':. ""e I.: 'Range oJ Average' Ie..;> . ''j. ;~ . 'ii ,r Historic Values for ".; .~' I' ' , Itlf.l. €,onstituent rt';~ It! 20ll-,May ,,:2011 _ July '" Monitorjng Wells! *~_ 'j Y. 2,009 ,. ,2010 "Ii) '<~ • -'" "' 2012 .F' I'~ -",j ~ ",'. :( .y'. W,o; i'~ t! (1.,,%" '~aj or, Ions (!ll~l)-~~, ,'f':. if. " ' ,"~, 1'1" _aiO", ;. "' • '~;i .f!,., ,1\">" .. ' ,_ "'i, .~ Ii " "'ff: •. 1Ii! ," ',1, .... ,~ , Carbonate <1 <1 <1 7 <1 ""'I ':.-" .. ,'iJ'~" l' . ,iL Bicarbonate 292 332 270 299 298 .. ~ --I"" ";~i . II! T " Calcium 90.8 96.5 88.8 96.6 105 ~I ,):~. --"''', . :;r.l.""~"' Chloride 60 63 49 64 'i" 78 ND -2.13 " Fluoride 0.7 0.73 0.58 0.58 0.64 'il ND-1,3 !~ Magnesium 26.6 28.9 26.4 28.4 32.7 ~~i: r~} --", ~' .i,~ .. .. Nitrogen-Ammonia 0.28 <0.05 <0.05 0.32 <0.05 ~ . "" ;i ~~.~--. Nitrogen-Nitrate 1,4 1 1.4 0.5 2.8 . "", '; " ::ij--:1, Potassium 2.4 2.74 2.6 2.9 2 ''1<1 "!I '" ~1!." :c~,!';l "J ,_,/'i>i.-' A" J ,~'. ~j Sodium 61.4 62.7 62.5 68.6 77.4 .~ --." Sulfate 178 179 166 171 171 ND -3455 ~ ~ .~ pH (s.u.) 7.85 7.56 7.96 8.17 7.5 :r, ,1\1'( 6.7-8.~" ,,,,Ji TDS 605 661 571 582 660 i 1019 -"5548 .':~;:' ~' "', Me~als (ug/l) '~ \'i " .. i· .' m .,; ,., . ;;', -., Arsenic <5 <5 <5 <5 <5 ."" 'ii, ' . ,:, .~ , .,~_'.*jJ; -;" "~,, i'! 'f~ ~;J~','ii Beryllium <0.5 <0.5 <0.5 <0.5 <0.5 I':· . ,g.~:.~ I', i~l\t'" :~ ., Cadmium <0.5 <0.5 <0.5 <0.5 <0.5 ~ ND -4.78 -, , Chromium <25 <25 <25 <25 <25 I'f' 'Ii ,,":~ ',,-~ .. ,,J'; ~~.,~ Cobalt <10 <10 <10 <10 <10 :~ 2-'~: Copper <10 <10 <10 <10 <10 -:' --<c" '" iii 'il Iron <30 <30 37 55 34 ~ Nq:-]942 , ", . l¥, ": Lead <1.0 <1.0 <1.0 <1.0 <1.0 " -- " .'" Manganese 54 11 47 84 <10 ND -3~~550 m ;~ Mercury <0.5 <0.5 <0.5 <0.5 <0.5 I"" , -,; .,'] ,"-'!Ii~i:J~;: ., . ~ Molybdenum <10 <10 <10 <10 <10 II:: ~ c ""': '-. I~ --If. Nickel <20 <20 <20 <20 <20 NJi) -61 ,1:1 . -;:,; ~, ,r:t Selenium 12.1 9.2 13.1 5.5 13.2 . ,; NDJ;!.06.5 '~r~~ Silver <10 <10 <10 <1 0 <10 .~- "I, Thallium <0.5 <0.5 <0.5 <0.5 <0.5 .' --'" -~" ,', ,J'j ",~ <100 <100 <100 ;h '~~;~~,,~ ~. Tin <100 <100 «5.0)** Iii: .. " ili'~'" " Uranium 15.2 17.8 18.8 15.3 21.1 .:.. ND ~··59.8 . 'f'JI/i! Vanadium <15 <15 <15 <15 <15 1;i;. '," < ,"," ''''~" . ;" ~' Zinc <10 <10 <10 <10 <10 .' :;".'11' .~:-,';;·G,l;' I,r,,~;~,~ .·iiI .ni .0;, ''" \ ~ .' ,. -'-. ell',' ,P .:'#fni. "', ~t ' Radiologies (PCill) .', "nf .~ I" ,.:' .~ ii!',fj! ".f\ iF ':', " .,. ~/1h '(l' \0 '?' " ~"~,, ;5 , "~ Gross Alpha 0.9 <0.5 1.5 1.6 0.5 ~ ~tI't;. 36 , I"" ,'} , ~":~:; ••• !,: ~:~;f~tl~/:'\' ,_t;),~., ,;~jt ,~:,i~d\i:i ;.'," .';,;' 'i',VOCS (ugfC)' ',','" "fi~;,.~;;'. ,',\"'j;.", '., ;,., , •..•. ~ ~ ,;;,' " ',~r 0' ~~, ii', ",,,, <tii;'. «,' ~F ,.;,' ,'" ;,,,.1:1] "', '.," ", ,\: ',.J':;( Acetone <20 <20 ND ND ND D!}!J~ ;.~~ ·,e , ~, Benzene <1.0 <1.0 ND ND ND tf"J !~~ ~-• ''& ;~~ I~ ". ':;'.: ',i; ,"'>fl,W!!. '", ,,'1li ", Table 2D Detected Constituents and Comparison to Historic Values and Mill Site Monitoring Wells ~~~~~~~~~~~ Chloroform <1.0 <1.0 ND ND ND Chloromethane <1.0 <1.0 ND ND ND MEK <20 <20 ND ND ND Methylene Chloride <1.0 <1.0 ND ND ND Naphthalene <1.0 <1.0 ND ND ND Tetrahydrofuran <1.0 <1.0 ND ND ND Toluene <1.0 <1.0 ND ND ND Xylenes <1.0 <1.0 ND 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- 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) **In June 2012, the samples collected were inadvertently analyzed twice for Tin only. Both results are shown, and both data packages have been included in this report. 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 QA/QC Evaluation for Sample Duplicates E-7 Radiologies 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 Field Data Record-Seeps and Springs Sampling Seep or Spring Location: Co±+ol\.wl200 5prl~ Date For Initial Sampling Visit:~/.2.0~ __ Time:_O_'_'"t_S _____ _ Sample Collected: Jil 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: Weather Conditions at Time of Sampling:_S""""lN\;;;...;..;..:.(\-.;:.t?,:->r-' ___________ _ Estimated Seep or Spring Flow Rate: _._7.....,;;S __ 6-_· _p_~ ___________ _ Field Parameter Measurements: -pH "'.01, -Temperature (OC) --=.13I.'~.":::"~':"'« __ ----:-__ -_____ _ -Conductivity fjMHOC/cm _l..::.5;;....'=...;g~ _______ _ -Turbidity (NTU) (if measured).---.;~=3~."-,---______ _ -Redox Potential Eh (m V) (if measured) _'i...:.::l,;...;:;.;..' ____ _ Analytical Parameters/Sample Collection Method: DYes oNo DYes o No 1!J Nutrients DYes oNo DYes o No ftI Other Non DYes o No DYes o No ., Gross Alpha DYes o No DYes oNo 0 QC Samples Associated with this Location: o Rinsate Blank 'fi Duplicate Duplicate Sample Name: ~~lc. 51';tlj 0 0 0 lG 0 0 0 Notes: lwt;~«Al ____ ta _ $a~c J-b:r,JtL "'M1Mr~~~ OeM. tb;t eft $ t~. __ m = .... ~ .. d QTJS. Len: A.1ft ..,! .. ~"() . '~~~:.f"~-"'+-'!!!I;( :"""r'i~I...u.f,t!l . --- 0 0 0 Field Data Record-Seeps and Springs Sampling Date For Initial Sampling Visit: , '~t>ll..b'~ Sample Collected: t$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: :t:'M\crf ~",c;or De.n: I . P\~~ r Weather Conditions at Time of sampling:-~~~~~".:...1+----________ _ Estimated Seep or Spring Flow Rate: --"--7z...o5 _____ , _____________ _ Field Parameter Measurements: -pH i.O, -Temperature (OC) __ ..... I.z:.'.:.... ::a..--.;:::8 _________ ~ -Conductivity (.tMHOC/cm _~I~,.r.tUIlPY-__ ------- -Turbidity (NTU) (if measured),==--, 2._:> ... ~OL.."'1~_. __ ~ __ ~~ -Redox Potential Eh (mV) (if measured) _S ...... ., ..",.1,...,-l~' ._,_~~~ Analytical Parameters/Sample Collection Method: DYes oNo DYes 0 0 Nutrients DYes oNo DYes o No 0 0 Other Non DYes o No DYes oNo tt 0 0 0 Radiolo . Gross Alpha o Yes oNo o Yes oNo 0 0 0 QC Samples Associated with this Location: o Rinsate Blank o Duplicate Duplicate Sample Name: ___________ _ Notes: ... ~ot' Cl>*t)n~ -¥~"_._ .. ~._w ____ ~ I , • _ ••••• ___ ::IIIW .. _ .......... '. • •• -•••• Field Data Record-Seeps and Springs Sampling Date For Initial Sampling Visit: b /:4) I !26 12 Sample Collected: ~ Yes 0 No Time: 1()J5 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: Weather Conditions at Time of Sampling: SUl.(\(l~ t,;>;t~ 0 -I!Hi, ,"",j~J Estimated Seep or Spring Flow Rate: _._iS~........::&=---· f>~M.~ ___________ _ Field Parameter Measurements: -pH 7.57 -Temperature (OC) _..:::2..~Q~.3~'~ _________ _ -Conductivity flMHOC/cm .....I\~O~4c:():.......-________ _ -Turbidity (NTU) (if measured)_..:..:IO:::..,:,!..l..8l.--______ _ -Redox Potential Eh (mV) (if measured) --=-:J}.~q.;.;.~~ ___ _ Analytical Parameters/Sample Collection Method: DYes DNo 0 Nutrients oNo DYes DNo 0 Other Non oNo DYes o No 0 Radiolo cs Gross Alpha o No o Yes o No 0 QC Samples Associated with this Location: o Rinsate Blank o Duplicate Duplicate Sample Name: ___________ _ J Field Data Record-Seeps and Springs Sampling Date For Initial Sampling Visit:~~l~f2.,., Sample Collected: tc Yes 0 No Time: 0 12.0 Date For Second Sampling Visit! __ -----Time:_~ ______ _ Sample Collected: 0 Yes 0 No Date For Third Sampling Visit: _______ Time: _________ _ Sample Collected: 0 Yes D No Sampling Personnel: -r;M«.JIJl;J...j • &0........ ?.ll'l<t" ,.000lkJcrs!!lt EM &oAk:. Weather Conditions at Time of Sampling: C,lcAI"' __ w'31",u .some w;,.,4 ..... m'~_' _ Estimated Seep or Spring Flow Rate: ~I ___ 6r:...aJ>~M__=__~~====~~~~-~~ Field Parameter Measurements: -pH ,.5' -Temperature (Oe) ~rs~: ~ .. !..!i!"=",,,,-=_ ====='~~_~~~~ __ ' -Conductivity ~MHOC/cm 1~'7 =,~=====~~~= ~ Turbidity (NTU) (if measured)--EL ..... S~ _______ _ -Redox Potential Eh (m V) (if measured) ~I!,,;;~'::L' ~~~ _. _~ __ _ Analytical Parameters/Sample Collection Method: So Yes DYes 0 0 0 Nutrients '" Yes DNo DYes o No ~ 0 0 D Other Non qJ Yes oNo o Yes oNo IJ 0 0 0 Radiolo Gross Alpha ~ Yes oNo DYes o No 0 .. 0 0 QC Samples Associated with this Location: o Rinsate Blank o Duplicate Duplicate Sample Name: Field Data Record-Seeps and Springs Sampling Seep or Spring Location: _--:W~~e.=..s:.....Jt~W~l&c.=' :::...:+_ec~_ ..... .5~&.c:.Je......q::p~ _______ _ -'D t F I "t" IS." V" "t-"1:l.O/2.0~ a e or nl la amp Ing lSI.. bL:. .. ' L .. n n , ,(~:, Sample Collected: 0 Yes ttNa Date For Second Sampling Visit: b / ~'1 / !2.,o~ Sample Collected: 0 Yes IX No Time: 4&30 Time: l.x:sO Date For Third Sampling Visit:~21!1.l ~ ,1.2 _~ Time: 'I 3:30~w.~_~,~~ Sample Collected: 0 Yes Ql No Sampling Personnel: Weather Conditions at Time of Sampling: _______________ _ Esti~ated Seep or Spring Flow Rate: ____ ~ ___________ _ l/~ . i/~' .' Field Parameter Measurements: -pH -Temperature C;C) ______________ _ -Conductivity f,!MHOC/cm ___________ _ -Turbidity (NTU) (if nleasured) _________ _ -Redox Potential Eh (mV) (if nteasured) ______ _ Analytical Parameters/Sample Collection Method: DYes DYes DNa Nutrients DYes DNa DYes o No 0 Other Non DYes o No o Yes o No 0 Radiala 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 Field Data Record-Seeps and Springs Sampling Date For Initial Sampling Visit: '1~/f/JJ)f!L .. Sample Collected: 0 Yes ,No Date For Second Sampling Visit: ';/27 /~\~ Sample Collected: 0 Yes ~ No Date For Third Sampling Visit: 71 'f I M i fJ... Sample Collected: 0 Yes Q(No Sampling Personnel: Time: 1:30 0 Time: 12.00 Time: I 210 Weather Conditions at Time of Sampling: ______ ~ ________ _ Estimated Seep or Spring Flow Rate: ______________ --- Field Parameter Measurements: -pH -Temperature (OC) ______________ _ -Conductivity f,tMHOC/cm ___________ _ -Turbidity (NTU) (if measured) _________ _ -Redox Potential Eh (mV) (if measured) ______ _ Analytical Parameters/Sample Collection Method: VOCs DYes o No D Yes DNo 0 0 THF DYes DNo DYes DNo 0 0 Nutrients DYes o No D Yes oNo 0 0 Other Non DYes o No DYes DNo 0 0 Radiol s Gross Alpha DYes oNo DYes oNo 0 0 QC Samples Associated with this Location: o Rinsate Blank o Duplicate Duplicate Sample Name: Notes: '/flb/2.0 12 • ~ pc-l~ ~4U l ~~ b/Z7/~r2 --D.-~ "1LtjL:JbI~~ .o;¥ 0 0 0 0 0 0 0 0 0 0 Field Data Record-Seeps and Springs Sampling Seep or Spring Location: Date For Initial Sampling Visit: b/2..ol~c, ... Sample Collected: 0 Yes IJ No Date For Second Sampling Visit: I;(;:rzl !2012.. Sample Collected: 0 Yes ~ No Date For Third Sampling Visit: 7/g l • 4t Sample Collected: 0 Yes ,r No Sampling Personnel: Time: !!'l"So Time: )300 Time: , 1eo Weather Conditions at Time of SampUng: ____ ~ __________ _ Estimated Seep or Spring Flow Rate: ________________ _ Field Parameter Measurements: -pH -Temperature (OC) ______________ _ -Conductivity J1MHOC/cm ___________ _ -Turbidity (NTU) (if measured) _________ _ -Redox Potential Eh (mV) (if measured) ______ _ Analytical Parameters/Sample Collection Method: DYes oNo DYes oNo DYes o No DYes oNo Nutrients DYes o No o Yes oNo o o Other Non DYes o No o Yes oNo o o Radiolo Gross Alpha DYes D No DYes oNo o o QC Samples Associated with this Location: o Rinsate Blank o Duplicate Duplicate Sample Name: ___________ _ Notes: &/2.0/2.01')... p SP"'~".)~ Jr~ G/a.7/(/.J!)J!:J-... D:j o o o o o o . ,~. ;;r.(,: .. " ~.. {.. ·,; • r ,\l < ~~ . .. , ~,!t; (I '&'~J' TabB Field Parameter Measurement Data F' Id Ie parameters Location , pH , Conductivity Turbidity' , Redox ' Temperature . . pate June 2012 June 2012 June 2012 June 2012 June 2012 Entrance Spring 7.57 1040 10.8 292 20.36 Cottonwood Seep 7.06 1568 23.4 421 16.28 Back Spring (Duplicate of Cottonwood Spring) 7.06 1568 23.4 421 16.28 Ruin Spring 7.56 1367 1.3 276 15.86 Not Not measured Not measured measured Not measured Not measured Westwater Seep (dry) (dry) (dry) (dry) (dry) TabC Survey Data and Contour Map Seeps and Springs Survey Locations Mid-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 3 7°32'0 1.6487" 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 water level surface) M.W-S perched monitoring well showing 5503 elevation in feet amsl TW4-12 temporary perched monitoring well 0 5583 showing elevation in feet amsl TWN-10 0 5586 temporary perched nitrate monitoring well showing elevation in feet amsl PIEZ-1 perched piezometer showing Q 5593 elevation in feet amsl TW4-27 temporary perched monitoring well ~ 5526 installed October, 2011 showing elevation in feet amsl RUIN SPRING 0 5380 seep or spring showing elevation in feet amsl HYDRO GEO CHEM, INC. NOTE: MW-4, MW-26, TW4-4, TW4-19, and TW4-20 are pumping wells KRIGED 3rd QUARTER, 2012 WATER LEVELS DR-SERIES DATA NOT INCLUDED WHITE MESA SITE APPROVED DATE REFERENCE H:/718000/nov121 seeps_springs/UwI0912sp_nodr.srf FIGURE C-1 ® estimated dry area (kriged Brushy Basin surface> kriged water level surface) M.W-5 perched monitoring well showing 5503 elevation in feet amsl TW4-12 . . temporary perched monltonng well 0 5583 showing elevation in feet amsl TWN-10 h d . .. A,5586 temporary perc e nitrate monltonng V well showing elevation in feet amsl PIEZ-1 perched piezometer showing ~ 5593 elevation in feet amsl TW4-27 temporary perched monitoring well ~ 5526 installed October, 2011 showing elevation in feet amsl RUIN SPRING b 5380 seep or spring showing elevation in feet amsl HYDRO GEO CHEM, INC. NOTE: MW-4, MW-26, TW4-4, TW4-19, and TW4-20 are pumping wells KRIGED 3rd QUARTER, 2012 WATER LEVELS WHITE MESA SITE APPROVED DATE REFERENCE H :/718000/nov121 seeps _ springs/Uwl0912sp.srf FIGURE C-2 TabD Analytical Laboratory Data EN:RGY LABORATORiES www.energylab.com Analytical ExCSJISfICB Sines 1952 Heli!na, MT 877-472 .. 0711 • Billings, MT 800-135-4489 • Gasper, WV 888-235-0515 ~i"efte, WY ,866~686-7175 • Rapid Gfty, SI} 888-672-1225 • College Station, TX 888-690-2218 ANALYTICAL SUMMARY REPORT July 27, 2012 Denison Mines USA Corp 6425 S Hwy 191 Blanding, UT 84511 Workorder No.: C12060931 Quote ID: C1640 -POC Wells Project Name: Seeps and Springs 2012 Energy Laboratories, Inc. Casper WY received the following 6 samples for Denison Mines USA Corp on 6/22/2012 for analysis. Sample ID Client Sample ID Collect Date Receive Date Matrix Test C12060931-001 Entrance Seep 06/20/12 10:15 06/22/12 Aqueous Alkalinity QA Calculations Chloride Fluoride Metals by ICP, Dissolved Metals by ICP-MS, Dissolved Nitrogen, Ammonia Nitrogen, Nitrate + Nitrite pH Gross Alpha minus Rn222 and Uranium Solids, Total Dissolved Solids, Total Dissolved -Calculated Sulfate SW8260B VOCs, Standard List C 12060931-002 Ruin Spring 06/20/12 9:20 06/22/12 Aqueous Same As Above C12060931-003 Cottonwood Spring 06/20/127:45 06/22/12 Aqueous Same As Above C12060931-004 Back Spring 06/20/127:45 06/22/12 Aqueous Same As Above C 1 2060931-005 Trip Blank 6746 06/20/120:00 06/22/12 Aqueous SW8260B VOCs, Standard List ---------------~*--------------- C 12060931-006 Temp Blank 06/21/120:00 06/22/12 Aqueous Temperature The results as reported relate only to the item(s) submitted for testing. The analyses presented in this report were performed at Energy Laboratories, Inc., 2393 Salt Creek Hwy., Casper, WY 82601, unless otherwise noted. Radiochemistry analyses were performed at Energy Laboratories, Inc., 2325 Kerzell Lane, Casper, WY 82601, unless otherwise noted. Any exceptions or problems with the analyses are noted in the Laboratory Analytical Report, the QA/QC Summary Report, or the Case Narrative. If you have any questions regarding these test results, please call. Report Approved By: C3¥~ £l uJtJl~ Reporting Supervisor Digitally signed by Stephanie Waldrop Date: 2012.07.27 15:42:16 ·06:00 Page 1 of 33 www.energylab.com Analytical ExcsllsncB SiIlCB 1952 Heiena, MT 877·412-071 t • Billings, MT 800-735-4489 • Casper, WV 888-235-0515 -Gillette, WY :866-686-7175 • Rapid City, SO 888-672-1225 • College Station, IX 888-690-2218 CLIENT: Denison Mines USA Corp Project: Seeps and Springs 2012 Report Date: 07/27/12 Sample Delivery Group: C12060931 CASE NARRATIVE ORIGINAL SAMPLE SUBMITTAL(S) All original sample submittals have been returned with the data package. SAMPLE TEMPERATURE COMPLIANCE: 40C (±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 , Radiochemical WY200002; Utah: WY00002; Virginia: 00057; Washington: C836 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 LABORATORIES www.energylab.com Analytical ExcsHBflCB Sines '952 Helena, MT 877-472-0711 • Billings. MT 800-735-4489 • Casper, WY 888-235-0515 :GiII~fte, WY 8~_& .. 6B6-7115 • Rapid City, SD 888-672-1225 • College Station, IX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10 : Denison Mines USA Corp Seeps and Springs 2012 C12060931-001 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 Solids, Total Dissolved TDS @ 180 C METALS -DISSOL VEO Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium 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 298 105 78 0.64 32.7 ND 2.8 2.0 77.4 171 660 ND ND ND ND ND ND 34 ND ND ND ND ND 13.2 ND ND 21 .1 ND ND 0.5 0.4 0.5 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 ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L pCi/L pCi/L pC ilL MDC - Minimum detectable concentration Report Date: 07/27/12 Collection Date: 06/20/12 10:15 OateReceived: 06/22/12 Matrix: Aqueous MCL! Qualifier Rl QCl Method Analysis Date / By D A2320 B 06/22/12 17:29 / jba 1 A2320 B 06/22/12 17:291 jba 0.5 E200.7 07/06/1220:15 /sf A4500-CI B 06/27/12 14:191 wc 0.10 A4500-F C 06/25/12 10:09 1 jba 0.5 E200.7 07/06/12 20:151 sf 0.05 A4500-NH3 G 06/29/12 17:351 Ijl 0.1 E353.2 06/27/12 15:10 /lr 0.5 E200.7 07/06/12 20:151 sf 0.5 E200.7 07/06/1220:151 sf 5 A4500-S04 E 06/26/12 11 :23 1 Ir 10 A2540 C 06/25/12 13 :57 1 ab 5.0 E200.8 07/11/12 19:25 1 cp 0.50 E200.8 07/11/1219:25/cp 0.50 E200.8 07/11/1219:25 1 cp 25 E200.8 07/11/1219:25/cp 10 E200.8 07/11/1219:25/cp 10 E200.8 07/11 /1219:25 /cp 30 E200.7 07/06/1220:15 1 sf 1.0 E200.8 07/11/1219:25/cp 10 E200.8 07/11/1219:25/cp 0.50 E200.8 07/11/1219:25 /cp 10 E200.8 07/11 /1219:25 /cp 20 E200.8 07/11/1219:25/cp 5.0 E200.8 07/11/1219:25 /cp 10 E200.8 07/11/1219:25 /cp 0.50 E200.8 07/11/1219:25/cp 0.30 E200.8 07/11/1219:25/cp 15 E200.8 07/11/1219:25/cp 10 E200.8 07/11/1219:25 /cp E900.1 07/04/12 10:04 /lbb E900.1 07/04/12 10:041 Ibb E900.1 07/04/12 10:04 /lbb MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 3 of 33 EN:RGY LABORATORIES www.energylab.com Analytical UeslJBflCB Sines '952 Helena, MT 877-412-071 f • Billings, MT 800-735-4489 " Casper, WY 888-235-0515 _~ille~~, WY 866-~86-7115 • Rapid City, S[) 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 2012 LablD: C12060931-001 Client Sample ID: Entrance Seep Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TDS Balance (O.BO -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-dB Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result 2.11 10.9 11.3 650 1.02 ND ND ND ND ND ND ND ND ND ND 126 112 146 114 Units 0/0 meq/L meq/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L %REC %REC %REC %REC S -Spike recovery outside of advisory limits. Report Date: 07/27/12 Collection Date: 06/20/12 10:15 DateReceived: 06/22/12 Matrix: Aqueous MCL! Qualifier Rl QCl Method Analysis Date 1 By A1030 E 07/27/12 10:361 kbh A1030 E 07127/12 10:361 kbh A1030 E 07127/12 10:361 kbh A1030 E 07/27/12 10:361 kbh A1030 E 07/27/1210:361 kbh 20 SWB260B 06/29/12 16:321 jlr 1.0 SWB260B 06/29/12 16:321 jlr 1.0 SWB260B 06/29/12 16:321 jlr 1.0 SWB260B 06/29/12 16:321 jlr 1.0 SWB260B 06/29/12 16:32 1 jlr 20 SWB260B 06/29/12 16:321 jlr 1.0 SWB260B 06/29/12 16:321 jlr 1.0 SWB260B 06/29/12 16:321 jlr 1.0 SWB260B 06/29/12 16:321 jlr 1.0 SWB260B 06/29/12 16 :32 1 jlr S ' BO-120 SWB260B 06/29/12 16:321 jlr 70-130 SWB260B 06/29/12 16 :32 1 jlr S BO-120 SWB260B 06/29/12 16:321 jlr BO-120 SWB260B 06/29/12 16:321 jlr MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 4 of 33 EN:RGY LABORATORIES www.energylab.com AnalytIcal ExcsHBflCB Sines 7952 Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 ~iUette, 'Iff nS .. 686-1175 • Rapid Cfty, SD 888-672-1225 • College Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 07/27/12 Project: Seeps and Springs 2012 Collection Date: 06/20/1209:20 Lab lD: C 12060931-002 DateReceived: 06/22/12 Client Sample ID: Ruin Spring Matrix: Aqueous MCL! Analyses Result Units Qualifier Rl QCl Method Analysis Date I By MAJOR IONS Carbonate as C03 ND mg/l A2320 B 06/22/12 17:37 1 jba Bicarbonate as HC03 237 mg/L A2320 B 06/22/12 17:37 1 jba Calcium 147 mg/L 0.5 E200.7 07106/1218:54/sf Chloride 28 mg/L 1 A4500-CI B 06/27/12 13:08 1 wc Fluoride 0.52 mg/L 0.10 A4500-F C 06/25/12 10:121 jba Magnesium 31 .9 mg/L 0.5 E200.7 07106/1218:54/sf Nitrogen, Ammonia as N ND mg/L 0.05 A4500-NH3 G 06/29/12 16:431 Ijl Nitrogen, Nitrate+Nitrite as N 1.6 mg/L 0.1 E353.2 06/27/12 15:131 Ir Potassium 3.5 mg/L 0.5 E200.7 07106/1218:54/sf Sodium 115 mg/L 0.5 E200.7 07106/1218:54/sf Sulfate 464 mg/L D 10 A4500-S04 E 06/26/12 11 :26 I Ir PHYSICAL PROPERTIES Solids, Total Dissolved TDS @ 180 C 1000 mg/L 10 A2540 C 06/25/12 13 :58 1 ab METALS -DISSOLVED Arsenic ND ug/L 5.0 E200.8 07/11 /1219:29/cp Beryllium ND ug/L 0.50 E200.8 07/11/1219:29/cp Cadmium ND ug/L 0.50 E200.8 07/11 /1219:29/cp Chromium ND ug/L 25 E200.8 07/11/1219:29/cp Cobalt ND ug/L 10 E200.8 07/11/1219:29/cp Copper ND ug/L 10 E200.8 07/1 1/1219:29/cp Iron ND ug/L 30 E200.7 07106/12 20 :27 1 sf Lead ND ug/L 1.0 E200.8 07/11/1219:291 cp Manganese ND ug/L 10 E200.8 07/11/1219:29/cp Mercury ND ug/L 0.50 E200.8 07/11/1219:29/cp Molybdenum 16 ug/L 10 E200.8 07/11/1219:29/cp Nickel ND ug/L 20 E200.8 07/11/1219:29/cp Selenium 10.8 ug/L 5.0 E200.8 07/11 /1219:29/cp Silver ND ug/L 10 E200.8 07/11/12 19:291 cp Thallium ND ug/L 0.50 E200.8 07/11 /12 19:291 cp Uranium 8.68 ug/L 0.30 E200.8 07/11/1219:29/cp Vanadium ND ug/L 15 E200.8 07/11/12 19:291 cp Zinc ND ug/L 10 E200.8 07/11/12 19:291 cp RADIONUCLIDES -DISSOLVED Gross Alpha minus Rn & U -0.09 pC ilL U E900.1 07104/12 10:041 Ibb Gross Alpha minus Rn & U Precision (±) 0.3 pC ilL E900.1 07104/12 10:041 Ibb Gross Alpha minus Rn & U MDC 0.5 pC ilL E900.1 07104/12 10:04 /lbb -----------------------------------------------------_. Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. MDC -Minimum detectable concentration U -Not detected at minimum detectable concentration MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 5 of 33 EN:RGY LABORATORIES www.energylab.com Analytical ExesllBflCB Sines 1952 Hel~na, MT 877-472-:-071 t • Billings, MT 800-735-4489 -Casper, WY 888-235-0515 ,.mil~~Ei, Wy .&.6.;&86-7n~ • Rapid City, SO 888-&12-1225 • College Station, lX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp Seeps and Springs 2012 C 12060931-002 Client Sample 10: Ruin Spring Analyses DATA QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TOS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-0ichlorobenzene-d4 Surr: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result 2.03 14.5 15.1 930 1.07 NO NO NO NO NO NO NO NO NO NO 122 115 140 110 Units % meq/l meq/l mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L %REC %REC %REC %REC S -Spike recovery outside of advisory limits. Report Date: 07/27/12 Collection Date: 06/20/1209:20 DateReceived: 06/22/12 Matrix: Aqueous MCL! Qualifier Rl QCl Method Analysis Date 1 By A1030 E 07/27/12 10:381 kbh A1030 E 07/27/1210:381 kbh A1030 E 07/27/1210:38/kbh A1030 E 07/27/1210:381 kbh A1030 E 07/27/12 10:381 kbh 20 SW8260B 06/29/12 17:07 1 jlr 1.0 SW8260B 06/29/12 17:07 1 jlr 1.0 SW8260B 06/29/12 17:07 1 jlr 1.0 SW8260B 06/29/12 17:07 1 jlr 1.0 SW8260B 06/29/12 17:07 1 jlr 20 SW8260B 06/29/12 17:07 1 jlr 1.0 SW8260B 06/29/12 17:07 1 jlr 1.0 SW8260B 06/29/12 17:07 1 jlr 1.0 SW8260B 06/29/12 17:07 1 jlr 1.0 SW8260B 06/29/12 17:07 1 jlr S 80-120 SW8260B 06/29/12 17:07 1 jlr 70-130 SW8260B 06/29/12 17 :07 1 jlr S 80-120 SW8260B 06/29/12 17:07 1 jlr 80-120 SW8260B 06/29/12 17:07 1 jlr MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 6 of 33 EI\ERGY LABORATORIES www.energylab.com Analytical ExCSU8I1CB Sines 7952 Helena, MT 877-472-071 f • Billings. MT 800-735-4489 • Casper, WY 888-235-0515 ~illefte, WY 866 .. 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 2012 Lab 10: C 12060931-003 Client Sample 10: 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 Solids, Total Dissolved TDS @ 180 C METALS -DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium 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 326 101 149 0.38 27.7 ND ND 6.2 247 356 1040 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 8.17 ND ND -0.2 0.2 0.5 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 ug/L ug/L ug/L ug/L ug/L ug/L 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: 07/27/12 Collection Date: 06/20/12 07:45 DateReceived: 06/22/12 Matrix: Aqueous MCL! Qualifier Rl QCl Method Analysis Date 1 By D U A2320 B 06/22/12 17:441 jba 1 A2320 B 06/22/12 17:441 jba 0.5 E200.7 07106/1220:31 1 sf A4500-CI B 06/27/1213:18/wc 0.10 A4500-F C 06/25/12 10:161 jba 0.5 E200.7 07106/1220:31 1 sf 0.05 A4500-NH3 G 06/29/12 16:491 Ijl 0.1 E353.2 06/27/1215:15/1r 0.5 E200.7 07106/1220:31 1 sf 0.5 E200.7 07106/12 20:31 1 sf 10 A4500-S04 E 06/26/12 11 :27 1 Ir 10 A2540 C 06/25/12 13:581 ab 5.0 E200.8 07/11/1219:52/cp 0.50 E200.8 07/13/12 07:20 1 cp 0.50 E200.8 07/11/1219:521 cp 25 E200.8 07/11/1219:52/cp 10 E200.8 07/11/1219:521 cp 10 E200.8 07/11/1219:521 cp 30 E200.7 07106/12 20:31 1 sf 1.0 E200.8 07/11/1219:521 cp 10 E200.8 07/11/12 19:521 cp 0.50 E200.8 07/11/1219:52/cp 10 E200.8 07/11/12 19:521 cp 20 E200.8 07/11/1219:52/cp 5.0 E200.8 07/11/1219:52/cp 10 E200.8 07/11/12 19:521 cp 0.50 E200.8 07/11/1219:52/cp 0.30 E200.8 07/11/1219:52/cp 15 E200.8 07/11/12 19:521 cp 10 E200.8 07/11/12 19:521 cp E900.1 07104/12 10:041 Ibb E900.1 07104/12 10:041 Ibb E900.1 07104/12 10:041 Ibb MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 7 of 33 EN:RGY LABORATORiES www.energylab.com Analytical ExcsHBflCB Sines 7952 Helena, MT 877~472-071 t -Billings, MT 808-735-4489 • Casper, WV 888-235-0515 '~iII~fl:e, WY86l'G86-7175 • 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: Seeps and Springs 2012 Lab 10: C 12060931-003 Client Sample 10: Cottonwood Spring Analyses OAT A QUALITY AlC Balance (± 5) Anions Cations Solids, Total Dissolved Calculated TOS Balance (0.80 -1.20) VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1 ,2-0ichlorobenzene-d4 Surr: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. Result 3.60 17.0 18.2 1100 0.960 NO NO NO NO NO NO NO NO NO NO 122 105 138 113 Units % meq/L meq/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L %REC %REC %REC %REC S -Spike recovery outside of advisory limits. Report Date: 07/27/12 Collection Date: 06/20/12 07:45 DateReceived: 06/22/12 Matrix: Aqueous MCL! Qualifier Rl QCl Method Analysis Date / By A1030 E 07/27/1210:38/ kbh A1030 E 07127/12 10:381 kbh A1030 E 07/27/1210:381 kbh A1030 E 07/27/1210:38 / kbh A1030 E 07/27/1210:381 kbh 20 SW8260B 06/29/12 20:01 1 jlr 1.0 SW8260B 06/29/12 20:01 1 jlr 1.0 SW8260B 06/29/12 20:01 1 jlr 1.0 SW8260B 06/29/12 20:01 1 jlr 1.0 SW8260B 06/29/12 20:01 / jlr 20 SW8260B 06/29/12 20:01 1 jlr 1.0 SW8260B 06/29/12 20:01 1 jlr 1.0 SW8260B 06/29/12 20:01 1 jlr 1.0 SW8260B 06/29/12 20:01 1 jlr 1.0 SW8260B 06/29/12 20:01 1 jlr S 80-120 SW8260B 06/29/1220:01 1 jlr 70-130 SW8260B 06/29/12 20:01 1 jlr S 80-120 SW8260B 06/29/12 20:01 1 jlr 80-120 SW8260B 06/29/12 20:01 1 jlr -------------------- MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 8 of 33 EN:RGY LABORAT ORIES www.energylab.com Analytical Excs.IJBllCB SiIlCB 1952 Helena, MT 877-412-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 Gillette, 'NY 866-686-7115 • Rapid City, Sf} 888-672-1225 • College Station, IX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Seeps and Springs 2012 Lab 10: C 1 2060931-004 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 Solids, Total Dissolved TDS @ 180 C METALS -DISSOLVED Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium 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 326 93.8 121 0.38 25.5 ND ND 6.2 223 366 1040 ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND 8.56 ND ND 0.07 0.3 0.5 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 ug/L ug/L ug/L ug/L ug/L ug/L 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: 07/27/12 Collection Date: 06/20/12 07:45 DateReceived: 06/22/12 Matrix: Aqueous MCL! Qualifier RL QCL Method Analysis Date 1 By D U A2320 B 06/22/12 17:531 jba 1 A2320 B 06/22/1217:531 jba 0.5 E200.7 07/06/1219:021 sf A4500-CI B 06/27/1213:25/wc 0.10 A4500-F C 06/25/12 10:191 jba 0.5 E200.7 07/06/1219:021 sf 0.05 A4500-NH3 G 06/29/12 16:51 1 Ijl 0.1 E353.2 06/27/12 15:181 Ir 0.5 E200.7 07/06/1220:351 sf 0.5 E200.7 07/06/12 19:02 1 sf 10 A4500-S04 E 06/26/12 11 :35 1 Ir 10 A2540 C 06/25/12 13:58 1 ab 5.0 E200.8 07/11/12 19:571 cp 0.50 E200.8 07/13/1207:251 cp 0.50 E200.8 07/11/1219:57/cp 25 E200.8 07/11/12 19:571 cp 10 E200.8 07/11/1219:571 cp 10 E200.8 07/11/1219:571 cp 30 E200.7 07/06/1220:351 sf 1.0 E200.8 07/11/1219:571 cp 10 E200.8 07/11/12 19:571 cp 0.50 E200.8 07/11/1219:57/cp 10 E200.8 07/11/1219:571 cp 20 E200.8 07/11/1219:571 cp 5.0 E200.8 07/11/12 19:571 cp 10 E200.8 07/11/1219:571 cp 0.50 E200.8 07/11/1219:571 cp 0.30 E200.8 07/11/1219:571 cp 15 E200.8 07/11/1219:571 cp 10 E200.8 07/11/1219:571 cp E900.1 07/04/12 10:041 Ibb E900.1 07/04/1210:04/1bb E900.1 07/04/1210:04/1bb MCL -Maximum contaminant level. ND -Not detected at the reporting limit. D -RL increased due to sample matrix. Page 9 of 33 EI\ERGY LABORATORIES www.energyiab.com Analytical ExCSUBflCB Sines 1952 Helena, MT 877 ·472-0711 -Billings. MT 800-735-4489 • Casper, WY 888-235-0515 Jli11efte, WY~6&:"686-7175 • Rapid City, SD 888-672-1225 • College Station, IX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Seeps and Springs 2012 Lab 10: C 12060931-004 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 0.740 16.4 16.6 1000 1.01 ND ND ND ND ND ND ND ND ND ND 120 112 133 105 Units % meq/L meq/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L %REC %REC %REC %REC S -Spike recovery outside of advisory limits. Report Date: 07/27/12 Collection Date: 06/20/12 07:45 DateReceived: 06/22/12 Matrix: Aqueous MCL! Qualifier Rl QCl Method Analysis Date 1 By A1030 E 07/27/1214:491 sdw A1030 E 07/27/1214:491 sdw A1030 E 07/27/1214:491 sdw A1030 E 07/27/1214:491 sdw A1030 E 07/27/1214:491 sdw 20 SWB260B 07102/12 16:051 jlr 1.0 SWB260B 07102/1216:051 jlr 1.0 SWB260B 07102/12 16:051 jlr 1.0 SWB260B 07102/12 16:051 jlr 1.0 SWB260B 07102/12 16:051 jlr 20 SWB260B 07102/12 16:051 jlr 1.0 SWB260B 07102/1216:051 jlr 1.0 SWB260B 07102/12 16:051 jlr 1.0 SWB260B 07102/1216:051 jlr 1.0 SWB260B 07102/12 16:05 1 jlr BO-120 SWB260B 07102/12 16:051 jlr 70-130 SWB260B 07102/1216:051 jlr S BO-120 SWB260B 07102/1216:051 jlr BO-120 SWB260B 07102/12 16:051 jlr MCL -Maximum contaminant level. ND -Not detected at the reporting limit. Page 10 of 33 EN:RGY LABORATORIES www.energylab.com ( Analytical ExcsDBflCB Sines 1852 J.' Helena, PM B77~472~0711 • Billings, MT 800-735-4489 • Casper, WV 888~235-0515 .§illett.~, WY 866 .. 686-7175 • Rapid City, SO 888-672-1225 • College Station, IX 888-690-2218 LABORATORY ANAL VTICAL REPORT Prepared by Casper, WY Branch Client: Project: Lab 10: Denison Mines USA Corp Seeps and Springs 2012 C 12060931-005 Client Sample 10: Trip Blank 6746 Analyses Result VOLATILE ORGANIC COMPOUNDS Acetone Benzene Carbon tetrachloride Chloroform Chloromethane Methyl ethyl ketone Methylene chloride Naphthalene Toluene Xylenes, Total Surr: 1,2-0ichlorobenzene-d4 Surr: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Report Definitions: RL -Analyte reporting limit. QCL -Quality control limit. NO NO NO NO NO NO NO NO NO NO 121 113 138 117 Units ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L %REC %REC %REC %REC S -Spike recovery outside of advisory limits. Report Date: 07/27/12 Collection Date: 06/20/12 DateReceived: 06/22/12 Matrix: Aqueous MCL! Qualifier Rl QCl Method Analysis Date 1 By 20 SW8260B 06/29/1218:161 jlr 1.0 SW8260B 06/29/12 18:161 jlr 1.0 SW8260B 06/29/1218:161 jlr 1.0 SW8260B 06/29/1218:161 jlr 1.0 SW8260B 06/29/1218:16/jlr 20 SW8260B 06/29/12 18: 16 1 jlr 1.0 SW8260B 06/29/1218:161 jlr 1.0 SW8260B 06/29/1218:16/jlr 1.0 SW8260B 06/29/1218:16/jlr 1.0 SW8260B 06/29/1218:16/jlr S 80-120 SW8260B 06/29/1218:16/jlr 70-130 SW8260B 06/29/1218:16/jlr S 80-120 SW8260B 06/29/12 18:161 jlr 80-120 SW8260B 06/29/1218:161 jlr MCL -Maximum contaminant level. NO -Not detected at the reporting limit. Page 11 of 33 EI\ERGY LABORATORIES www.energylab.com Analytical ExCBDBllCB SiIlCB ,g52 Helena, MT 871-472-071 t • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 . 9illef.!:e, 'NY 866 .. 686-7175 • Rapid City, SI} 888-672-1225 • College Station, TX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: LablD: Denison Mines USA Corp Seeps and Springs 2012 C 12060931-006 Client Sample ID: Temp Blank Analyses Result Units PHYSICAL PROPERTIES Temperature Report Definitions: Rl -Analyte reporting limit. QCl -Quality control limit. 2.2 Qualifier Rl Report Date: 07/27/12 Collection Date: 06/21/12 DateReceived: 06/22/12 Matrix: Aqueous MCL! QCl Method Analysis Date / By E170.1 06/22/1209:501 kbh MCl -Maximum contaminant level. NO -Not detected at the reporting limit. Page 12 of 33 EI\ERGY LABORATORIES www.energylab.com Analytical ExcsJlencB Sines "52 Hel~na, MT 871·472-0111 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 ~iII~tte, WV86&-686-7175 • Rapid City, 51} 888-672-1225 • College Station, IX 888-690-2218 LABORATORY ANALYTICAL REPORT Prepared by Casper, WY Branch Client: Project: Denison Mines USA Corp Seeps and Springs 2012 Lab 10: C12060931-001 Client Sample 10: Entrance Seep Analyses PHYSICAL PROPERTIES pH Lab 10: C 1 2060931-002 Client Sample 10: Ruin Spring Analyses PHYSICAL PROPERTIES pH Lab 10: C 12060931-003 Client Sample 10: Cottonwood Spring Analyses PHYSICAL PROPERTIES pH Lab 10: C 12060931-004 Client Sample 10: Back Spring Analyses PHYSICAL PROPERTIES pH Report Rl -Analyte reporting limit. Definitions: QCl -Quality control limit. Result Units 7.50 s.U. Result Units 7.53 s.U. Result Units 7.53 s.U. Result Units 7.58 s.U. H -Analysis performed past recommended holding time. Qualifiers Rl H 0.01 Qualifiers Rl H 0.01 Qualifiers Rl H 0.01 Qualifiers Rl H 0.01 MeL! Report Date: 07/27/12 Collection Date: 06/20/12 10:15 DateReceived: 06/22/12 Matrix: Aqueous Qel Method Analysis Date / By MeL! A4500-H B 06/22/12 13:04/ ab Collection Date: 06/20/1209:20 DateReceived: 06/22/12 Matrix: Aqueous Qel Method Analysis Date / By MeL! A4500-H B 06/22/12 13:06/ ab Collection Date: 06/20/1207:45 DateReceived: 06/22/12 Matrix: Aqueous Qel Method Analysis Date / By MeL! A4500-H B 06/22/12 13 :09 / ab Collection Date: 06/20/1207:45 DateReceived: 06/22/12 Matrix: Aqueous Qel Method Analysis Date / By A4500-H B 06/22/12 13:12/ ab MCl -Maximum contaminant level. NO -Not detected at the reporting limit. Page 13 of 33 EN:RGY LABORATORIES www.energylab.com Ana/ylil;al Exesll8flcfI Sines 1152 Hele~af MTB7l·472-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 jill~tie, WY e~6-686-7175 • 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: Seeps and Springs 2012 Analyte Count Result Units Method: A2320 B Sample 10: MBLK Alkalinity, Total as CaC03 Carbonate as C03 Bicarbonate as HC03 3 Method Blank ND mg/L ND mg/L 1.62 mg/L Sample 10: LCS-6677 Laboratory Control Sample Alkalinity, Total as CaC03 201 mg/L Sample 10: C12060935-003AOUP 3 Sample Duplicate Alkalinity, Total as CaC03 329 mg/L Carbonate as C03 ND mg/L Bicarbonate as HC03 Sample 10: C12060935-005AMS Alkalinity, Total as CaC03 Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration 401 mg/L Sample Matrix Spike 299 mg/L RL 5.0 1.0 1.0 5.0 5.0 5.0 5.0 5.0 Report Date: 07/27/12 Work Order: C12060931 %REC Low Limit High Limit RPO RPOLimit Qual Batch: R1611 03 Run: MANTECH_120622A 06/22/12 14:55 Run: MANTECH_120622A 06/22/1215:11 101 90 110 Run: MANTECH 120622A 06/22/12 20:05 - 0.7 10 10 0.7 10 Run: MANTECH_120622A 06/22/12 20:29 103 80 120 ND -Not detected at the reporting limit. Page 14 of 33 EN:RGY LABORATORIES www.energyJab.com Analytical ExC8UsnCB Sines '952 Helena, MT 877-472-071 t • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 _~,'~iJle~e, 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: Seeps and Springs 2012 Analyte Count Result Method: A2540 C Sample 10: MB-1_120625A Solids, Total Dissolved TDS @ 180 C Method Blank ND Units mg/L Sample 10: LCS-2_120625A Laboratory Control Sample Solids, Total Dissolved TDS @ 180 C 1100 mg/L Sample 10: C12060946-002A MS Sample Matrix Spike Solids, Total Dissolved TDS @ 180 C 1690 mg/L Sample 10: C12060983-001 A OUP Sample Duplicate Solids, Total Dissolved TDS @ 180 C 450 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_120625A 10 Run: BAL-1_120625A 10 99 90 110 Run: BAL-1 120625A 10 105 90 110 Run: BAL-1 120625A 10 0.4 ND -Not detected at the reporting limit. 07/27/12 C12060931 RPOLimit Qual Batch: TDS120625A 06/25/12 12:04 06/25/12 12:04 06/25/12 14:00 06/25/12 14:03 5 Page 15 of 33 EN:RGY www.energylab.com Helena, MTB71-472-0111 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 . _9.iII~fta! VjY 866 .. 6B6~ 7115 • Rapid City, SO 888-672-1225 • College Station, TX 888-690-2218 LABORATORIES Analytical ExC8/Jsnc, Sines 1952 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Seeps and Springs 2012 Analyte Count Result Units Method: A4500-CI B Sample 10: MBLK9-120627 Chloride Sample 10: LCS35-120627 Chloride Sample 10: C12060931-001AMS Chloride Sample 10: C12060931 -001AMSO Chloride Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank NO mg/L Laboratory Control Sample 3690 mg/L Sample Matrix Spike 248 mg/L Sample Matrix Spike Duplicate 248 mg/L Report Date: 07/27/12 Work Order: C 12060931 RL %REC Low Limit High Limit RPO RPOLimit Qual Batch: 120627-CL-TTR-W Run: TITRATION_120627A 06/27/1211:19 1.0 Run: TITRATION_120627A 06/27/1213:57 1.0 104 90 110 Run: TITRATION 120627A 06/27/1214:34 - 1.0 96 90 110 Run: TITRATION 120627A 06/27/12 14:35 - 1.0 96 90 110 0.0 10 NO -Not detected at the reporting limit. Page 16 of 33 EI'I:RGY www.energylab.com Helen,a, Mt 877-472-0711 • Billings, MT 800-735-4489 • Casper, W'f 888-235-0515 , _ l ille,tte, WY866-.86-7175 • Rapid Cfty, SD 888-672-1225 • College Station, TX 888-690-2218 LABORATORIES Anatylical ExcslJsnCB Sines 1952 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Seeps and Springs 2012 Analyte Count Result Units Method: A4S00-F C Sample 10: MBLK Fluoride Sample 10: LCS-6892 Fluoride Sample 10: C12060917-00SAMS Fluoride Sample 10: C12060917-00SAMSO 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 2.20 mg/L Sample Matrix Spike Duplicate 2.20 mg/L Report Date: Work Order: RL %REC Low Limit High Limit RPO Run: MANTECH_120625A 0.10 Run: MANTECH_120625A 0.10 100 90 110 Run: MANTECH_120625A 0.10 101 80 120 Run: MANTECH_120625A 0.10 101 80 120 0.0 ND -Not detected at the reporting limit. 07/27/12 C12060931 RPOLimit Qual Batch: R161131 06/25/1209:31 06/25/12 09:34 06/25/1209:42 06/25/12 09:45 10 Page 17 of 33 I EN:RGY www.energylab.com Helena, MT 877-472-011 t . Billings, MT 800-735-4489 • Casper, WY 888-235-0515 ~_~~iil~t;te, WY 866-586-7175 • Rapid Cfty, SD 888-672-1225 • Col/ege Station, TX 888-690-2218 LABORATORIES Analytical ExCSUIlflCB Sines '952 Client: Denison Mines USA Corp Project: Seeps and Springs 2012 Analyte Method: A4S00-H B Sample 10: pH 6.86 pH Sample 10: pH 6.86 pH Method: A4S00-H B Count QA/QC Summary Report Prepared by Casper, WY Branch Report Date: 07/27/12 Work Order: C12060931 Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Initial Calibration Verification Standard 6.84 s.u. 0.010 100 Initial Calibration Verification Standard 6.84 s.u. 0.010 100 98 98 Analytical Run: PHSC_101-C_120622A 06/22/1208:56 102 06/22/12 11 :41 102 Sample 10: C12060894-00SAOUP pH Sample Duplicate Batch: R161 051 06/22/1209:44 3 8.54 s.u. 0.010 0.0 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 18 of 33 EN:RGY www.energylab.com Helena, MT877 .. 472-D711 • Billings, MT 800-735-4489 . Casper, WV 888-235-0515 < :~il!~tte, Wy8G.S-GB6-7l75 • Rapid Cfty, SD 888-672-1225 • College Station, lX 888-690-2218 LABORATORIES Analytical ExcsDsncB Sinc8 1152 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 07/27/12 Project: Seeps and Springs 2012 Work Order: C12060931 Analyte Count Result Units RL O/OREC Low Limit High Limit RPO RPOLimit Qual Method: A4S00-NH3 G Batch: R161381 Sample 10: MBLK-1 Method Blank Run: TECHNICON~120629A 06/29/12 15:11 Nitrogen, Ammonia as N NO mg/L 0.050 Sample 10: LCS-2 Laboratory Control Sample Run: TECHNICON_120629A 06/29/12 15:13 Nitrogen, Ammonia as N 1.98 mg/L 0.050 99 90 110 Sample 10: LFB-3 Laboratory Fortified Blank Run: TECHNICON_120629A 06/29/12 15: 15 Nitrogen, Ammonia as N 1.87 mg/L 0.050 95 80 120 Sample 10: C12060931-002CMS Sample Matrix Spike Run: TECHNICON_120629A 06/29/12 16:45 Nitrogen, Ammonia as N 1.96 mg/L 0.050 100 90 110 Sample 10: C12060931 -002CMSO Sample Matrix Spike Duplicate Run: TECHNICON_120629A 06/29/12 16:47 Nitrogen, Ammonia as N 2.07 mg/L 0.050 106 90 110 5.5 10 -------_._--------------------------------------------------.. ---------------_._--- Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 19 of 33 EN:RGY www.energylab.com Helena, MTB77-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888 .. 235-0515 ~iII~tte, WY 88&·&86-7175 • Rapid City, SO 888-672-1225 • College Station, lX 888-690-2218 LABORATORIES Analytical ExCSJlsn&B Sines 1152 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Seeps and Springs 2012 Analyte Count Result Units Method: A4S00·S04 E Sample 10: LCS·1_120626 Sulfate Sample 10: MBLK-1_1 20626 Sulfate Sample 10: C12060931·003AMS Sulfate Sample 10: C12060931·003AMSO Sulfate Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Laboratory Control Sample 4740 mg/L Method Blank ND mg/L Sample Matrix Spike 548 mg/L Sample Matrix Spike Duplicate 551 mg/L Report Date: 07/27/12 Work Order: C12060931 RL %REC Low Limit High Limit RPO RPOLimit Qual Batch: 120626_1_S04-TURB-W Run: TURB-2_120626A 06/26/12 10:05 100 99 90 110 Run: TURB-2_120626A 06/26/12 10:07 10 Run: TURB-2_120626A 06/26/12 11 :29 10 100 90 110 Run: TURB-2_1 20626A 06/26/12 11 :32 10 101 90 110 0.5 10 ND -Not detected at the reporting limit. Page 20 of 33 EI'ERGY www.energyJab.com Helena, MTB77-472-071 t • Billings,. MT BOO-735-4489 • Casper, WY 888-235-0515 )iII~ti:e, Vf1866-6B6-7175 • Rapid City, SO 888-672-1225 • College Station, lX 888-690-2218 LABORATORIES Analytical Excs/lsncB Sines 1952 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 07/27/12 Project: Seeps and Springs 2012 Work Order: C12060931 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: E200.7 Analytical Run: ICP2-C_120706A Sample 10: ICV 5 Initial Calibration Verification Standard 07/06/12 11 :33 Calcium 49.7 mg/L 0.50 100 95 105 Iron 5.08 mg/L 0.030 102 95 105 Magnesium 52.2 mg/L 0.50 104 95 105 Potassium 49.7 mg/L 2.7 99 95 105 Sodium 50.7 mg/L 0.50 101 95 105 Sample 10: ICSA 5 Interference Check Sample A 07/06/12 12:14 Calcium 506 mg/L 0.50 101 80 120 Iron 189 mg/L 0.030 94 80 120 Magnesium 539 mg/L 0.50 108 80 120 Potassium -0.0145 mg/L 0.50 Sodium -0.0425 mg/L 0.50 Sample 10: ICSAB 5 Interference Check Sample AB 07/06/1212:18 Calcium 516 mg/L 0.50 103 80 120 Iron 190 mg/L 0.030 95 80 120 Magnesium 564 mg/L 0.50 113 80 120 Potassium -0.0163 mg/L 0.50 Sodium -0.0961 mg/L 0.50 Method: E200.7 Batch: R161622 Sample 10: MB-120706A 5 Method Blank Run: ICP2-C_120706A 07/06/12 12:38 Calcium NO mg/L 0.50 Iron NO mg/L 0.030 Magnesium NO mg/L 0.50 Potassium NO mg/L 0.50 Sodium NO mg/L 0.50 Sample 10: LFB-120706A 5 Laboratory Fortified Blank Run: ICP2-C_120706A 07/06/12 12:42 Calcium 50.0 mg/L 0.50 100 85 115 Iron 0.983 mg/L 0.030 98 85 115 Magnesium 50.5 mg/L 0.50 101 85 115 Potassium 45.8 mg/L 0.50 92 85 115 Sodium 49.9 mg/L 0.50 100 85 115 Sample 10: C12060931-0010MS2 5 Sample Matrix Spike Run: ICP2-C -120706A 07/06/1220:19 Calcium 150 mg/L 0.50 89 70 130 Iron 0.976 mg/L 0.030 92 70 130 Magnesium 81.7 mg/L 0.50 96 70 130 Potassium 46.7 mg/L 0.50 88 70 130 Sodium 130 mg/L 0.50 102 70 130 Sample 10: C12060931-0010MSO 5 Sample Matrix Spike Duplicate Run: ICP2-C -120706A 07/06/1220:23 Calcium 148 mg/L 0.50 85 70 130 1.2 20 Iron 0.972 mg/L 0.030 92 70 130 0.4 20 Magnesium 81.9 mg/L 0.50 96 70 130 0.2 20 Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 21 of 33 EN:RGY www.energylab.com ijelen~, MT877-472-D711 • Billings. MT 800-735-4489 • Casper, WY 888-235-0515 9}llettEi', Vir 86.6 .. ,86-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-690-2218 LABORATORIES Analytical ExCS/JBnCB Sines 1952 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 07/27/12 Project: Seeps and Springs 2012 Work Order: C12060931 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: E200.7 Batch: R161622 Sample 10: C12060931-0010MSO 5 Sample Matrix Spike Duplicate Run: ICP2-C_120706A 07/06/1220:23 Potassium 47.1 mg/L 0.50 88 70 130 0.9 20 Sodium 129 mg/L 0.50 101 70 130 0.4 20 Method: E200.7 Analytical Run: ICP4-C_120706A Sample 10: ICV 3 Initial Calibration Verification Standard 07/06/12 12:39 Calcium 50.5 mg/L 0.50 101 95 105 Magnesium 50.8 mg/L 0.50 102 95 105 Sodium 52.7 mg/L 0.50 105 95 105 Sample 10: ICSA 3 Interference Check Sample A 07/06/12 12:53 Calcium 453 mg/L 0.50 91 80 120 Magnesium 515 mg/L 0.50 103 80 120 Sodium 0.367 mg/L 0.50 Sample 10: ICSAB 3 Interference Check Sample AB 07/06/12 12:58 Calcium 450 mg/L 0.50 90 80 120 Magnesium 515 mg/L 0.50 103 80 120 Sodium 0.481 mg/L 0.50 Method: E200.7 Batch: R161661 Sample 10 : MB·120706A 3 Method Blank Run: ICP4-C_120706A 07/06/12 13:02 Calcium NO mg/L 0.50 Magnesium NO mg/L 0.50 Sodium NO mg/L 0.50 Sample 10: LFB-120706A 3 Laboratory Fortified Blank Run: ICP4-C -120706A 07/06/12 13:05 Calcium 49.7 mg/L 0.50 99 85 115 Magnesium 49.6 mg/L 0.50 99 85 115 Sodium 48.9 mg/L 0.50 98 85 115 Sample 10: C12060931·0010MS2 3 Sample Matrix Spike Run: ICP4-C -120706A 07/06/12 18:47 Calcium 144 mg/L 0.50 88 70 130 Magnesium 79.3 mg/L 0.50 97 70 130 Sodium 125 mg/L 0.50 94 70 130 Sample 10: C1 2060931-0010MSO 3 Sample Matrix Spike Duplicate Run: ICP4-C_120706A 07/06/12 18:51 Calcium 142 mg/L 0.50 85 70 130 1.0 20 Magnesium 79.0 mg/L 0.50 96 70 130 0.4 20 Sodium 125 mg/L 0.50 95 70 130 0.3 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 Analytical ExullBncs Sines 1952 Helena,MT 871-472-0111 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 _~ill~tf:e, Y!'f 86.6~&86-7115 • Rapid City, SD 888-672-1225 • College Station, lX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 07/27/12 Project: Seeps and Springs 2012 Work Order: C12060931 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: E200.8 Analytical Run: ICPMS4-C _120711 A Sample 10: ICV 17 Initial Calibration Verification Standard 07/11/1213:43 Arsenic 0.0498 mg/L 0.0010 100 90 110 Beryllium 0.0508 mg/L 0.0010 102 90 110 Cadmium 0.0501 mg/L 0.0010 100 90 110 Chromium 0.0500 mg/L 0.0010 100 90 110 Cobalt 0.0478 mg/L 0.0010 96 90 110 Copper 0.0508 mg/L 0.0010 102 90 110 Lead 0.0483 mg/L 0.0010 97 90 110 Manganese 0.0505 mg/L 0.0010 101 90 110 Mercury 0.00508 mg/L 0.0010 102 90 110 Molybdenum 0.0496 mg/L 0.0010 99 90 110 Nickel 0.0507 mg/L 0.0010 101 90 110 Selenium 0.0504 mg/L 0.0010 101 90 110 Silver 0.0216 mg/L 0.0010 108 90 110 Thallium 0.0493 mg/L 0.0010 99 90 110 Uranium 0.0505 mg/L 0.00030 101 90 110 Vanadium 0.0500 mg/L 0.0010 100 90 110 Zinc 0.0514 mg/L 0.0010 103 90 110 Method: E200.8 Batch: R161811 Sample 10: LRB 17 Method Blank Run: ICPMS4-C_120711A 07/11/1214:35 Arsenic NO mg/L 0.0050 Beryllium NO mg/L 0.00050 Cadmium NO mg/L 0.00050 Chromium NO mg/L 0.020 Cobalt NO mg/L 0.010 Copper NO mg/L 0.010 Lead NO mg/L 0.0010 Manganese NO mg/L 0.010 Mercury NO 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 Uranium NO mg/L 0.00030 Vanadium NO mg/L 0.010 Zinc NO mg/L 0.010 Sample 10: LFB 17 Laboratory Fortified Blank Run: ICPMS4-C_120711 A 07/11/1214:39 Arsenic 0.0519 mg/L 0.0010 104 85 115 Beryllium 0.0507 mg/L 0.0010 101 85 115 Cadmium 0.0505 mg/L 0.0010 101 85 115 Chromium 0.0513 mg/L 0.0010 103 85 115 Cobalt 0.0474 mg/L 0.0010 95 85 115 ------------------------------------------ Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MOC -Minimum detectable concentration Page 23 of 33 EI\ERGY LABORATORIES www.energylab.com Analytical ExCSUsnCB Sines 1852 Helena, MT 877-472-0711 -Billings, MT 800-735-4489 -Casper, WY 888-235-0515 '.= _~iI,l~tte! wy86t;:"',~86-7175 • Rapid City, SD 888-612-1225 • College Station, IX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Seeps and Springs 2012 Analyte Count Method: E200.8 Result Units Sample 10: LFB Copper 17 Laboratory Fortified Blank Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Uranium Vanadium Zinc 0.0515 mg/L 0.0491 mg/L 0.0516 mg/L 0.00476 mg/L 0.0497 mg/L 0.0519 mg/L 0.0527 mg/L 0.0186 mg/L 0.0500 mg/L 0.0508 mg/L 0.0512 mg/L 0.0522 mg/L Sample 10: C12070165-003CMS4 17 Sample Matrix Spike Arsenic 0.0549 mg/L Beryllium 0.0470 mg/L Cadmium Chromium Cobalt Copper Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Uranium Vanadium Zinc 0.0512 mg/L 0.0514 mg/L 0.0518 mg/L 0.0506 mg/L 0.0500 mg/L 0.0527 mg/L 0.00493 mg/L 0.0517 mg/L 0.0507 mg/L 0.0640 mg/L 0.0189 mg/L 0.0528 mg/L 0.0773 mg/L 0.0529 mg/L 0.0537 mg/L Sample 10: C12070165-003CMSO 17 Sample Matrix Spike Duplicate Arsenic 0.0540 mg/L Beryllium 0.0472 mg/L Cadmium Chromium Cobalt Copper Lead Manganese Mercury Molybdenum Nickel Selenium Qualifiers: RL -Analyte reporting limit. MDC - Minimum detectable concentration 0.0512 mg/L 0.0504 mg/L 0.0515 mg/L 0.0497 mg/L 0.0499 mg/L 0.0522 mg/L 0.00499 mg/L 0.0512 mg/L 0.0499 mg/L 0.0627 mg/L Report Date: 07/27/12 Work Order: C12060931 RL %REC Low Limit High Limit 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.0010 0.00030 0.0010 0.0010 0.0010 0.0010 0.0010 0.0050 0.0050 0.0050 0.0010 0.0010 0.00010 0.0010 0.0050 0.0010 0.0010 0.00050 0.00030 0.010 0.010 0.0010 0.0010 0.0010 0.0050 0.0050 0.0050 0.0010 0.0010 0.00010 0.0010 0.0050 0.0010 103 98 103 95 99 104 105 93 100 102 102 104 Run: ICPMS4-C_120711A 85 115 85 115 85 115 85 115 85 115 85 85 85 85 85 85 85 115 115 115 115 115 115 115 Run: ICPMS4-C_120711 A 109 70 130 94 70 130 102 102 103 100 100 105 99 97 101 102 94 106 112 101 105 107 94 102 101 103 98 100 104 100 96 99 100 70 70 70 70 70 70 70 70 70 70 70 70 70 70 70 130 130 130 130 130 130 130 130 130 130 130 130 130 130 130 Run: ICPMS4-C_120711A 70 130 70 130 70 130 70 70 70 70 70 70 70 70 70 130 130 130 130 130 130 130 130 130 ND -Not detected at the reporting limit. RPO RPOLimit Qual 1.6 0.4 0.0 1.9 0.6 1.7 0.2 0.9 1.3 1.0 1.6 1.9 Batch: R161811 07/11/1214:39 07/12/12 01 :06 07/12/12 01 :10 20 20 20 20 20 20 20 20 20 20 20 20 Page 24 of 33 EN:RGY www.energylab.com Helena, MlB77-472-0711 • Billings. MT 800-735-4489 • Casper, WY 888-235-0515 _,~illette, 'NY 8&6"',686-7175 • Rapid City, SO 888-672-1225 • College Station, IX 888-6&0-2218 LABORATORIES Analytical ExCBUBllCB Sines 1852 Client: Denison Mines USA Corp Project: Seeps and Springs 2012 QA/QC Summary Report Prepared by Casper, WY Branch Report Date: 07/27/12 Work Order: C12060931 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: E200.8 Sample 10: C12070165-003CMSO Silver Thallium Uranium Vanadium Zinc Method: E200.8 Sample 10 : ICV Beryllium Method: E200.8 Sample 10: LRB Beryllium Sample 10: LFB Beryllium Sample 10: C12060931-0040MS Beryllium Sample 10: C12060931-0040MSO Beryllium Qualifiers: 17 Sample Matrix Spike Duplicate 0.0191 mg/L 0.0010 0.0518 mg/L 0.00050 0.0762 mg/L 0.00030 0.0520 mg/L 0.010 0.0519 mg/L 0.010 Initial Calibration Verification Standard 0.0486 mg/L 0.0010 Method Blank ND mg/L 0.00050 Laboratory Fortified Blank 0.0505 mg/L 0.0010 Sample Matrix Spike 0.0450 mg/L 0.0010 Sample Matrix Spike Duplicate 0.0459 mg/L 0.0010 Batch: R161811 Run: ICPMS4-C_120711A 07/12/1201:10 95 70 130 0.9 20 104 70 130 1.9 20 110 70 130 1.4 20 100 70 130 1.7 20 102 70 130 3.4 20 Analytical Run: ICPMS4-C_120712A 97 90 110 Run: ICPMS4-C _120712A Run: ICPMS4-C_120712A 101 85 115 Run: ICPMS4-C_120712A 90 70 130 Run: ICPMS4-C _120712A 92 70 130 2.0 07/12/12 13:01 Batch: R161901 07/12/12 13:37 07/12/12 13:41 07/13/12 07:29 07/13/1207:34 20 RL -Analyte reporting limit. ND -Not detected at the reporting limit. MDC -Minimum detectable concentration Page 25 of 33 EN::RGY www.energylab.com .. Helena, MT87l .. 472-0711 • Billings, MT 800-735-4489 . Casper, WY 888-235-0515 ,,~i!'e,.ti:e, WV 86& ... &86-7175 • Rapid City, SD 888-&72-1225 • College Station, lX 888-690-2218 L ABORATORIES Analytical ExcslJBfI&B Sines 1952 QA/QC Summary Report Prepared by Casper, WY Branch Client : Denison Mines USA Corp Project: Seeps and Springs 2012 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: LFB-3 Nitrogen, Nitrate+Nitrite as N Sample 10: C12060198-001BMS Nitrogen, Nitrate+Nitrite as N Sample 10: C12060198-001 BMSO Nitrogen, Nitrate+Nitrite as N Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Method Blank NO mg/L Laboratory Control Sample 2.53 mg/L Laboratory Fortified Blank 1.94 mg/L Sample Matrix Spike 4.93 mg/L Sample Matrix Spike Duplicate 4.98 mg/L Report Date: Work Order: RL %REC Low Limit High Limit RPO Run: TECHNICON_120627B 0.10 Run: TECHNICON_120627B 0.10 101 90 110 Run: TECHNICON_120627B 0.10 99 90 110 Run: TECHNICON_120627B 0.10 92 90 110 Run: TECHNICON_120627B 0.10 95 90 110 1.0 NO -Not detected at the reporting limit. 07/27/12 C12060931 RPOLimit Qual Batch: R161256 06/27/12 14:53 06/27/12 14:55 06/27/12 14:58 06/27/12 15:03 06/27/12 15:05 10 Page 26 of 33 EN:RGY LABORATORIES www.energylab.com Analytical ExCSUsnCB Sines 1952 Helena, Mt877-472-D711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 ;.,:Gl!i~tte, Wy 866-686-7175 • Rap,irl 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: Seeps and Springs 2012 Analyte Count Result Units Method: E900.1 Sample 10: LCS-GA-OS42 Gross Alpha minus Rn & U Sample 10: MB-GA-OS42 Gross Alpha minus Rn & U Laboratory Control Sample 23.0 pC ilL 3 Method Blank -0.249 Gross Alpha minus Rn & U Precision (±) 0.207 pC ilL pC ilL pC ilL Gross Alpha minus Rn & U MDC 0.483 Sample 10: C12061068-003CMS Gross Alpha minus Rn & U Sample 10: C12061068-003CMSO Gross Alpha minus Rn & U Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration Sample Matrix Spike 51.5 pC ilL Sample Matrix Spike Duplicate 50.0 pC ilL Report Date: 07/27/12 Work Order: C12060931 RL %REC Low Limit High Limit RPO RPOLimit -.Qual Run: BERTHOLD 770-1_120629A 113 70 130 Run: BERTHOLD 770-1 120629A Run: BERTHOLD 770-1_120629A 121 70 130 Run: BERTHOLD 770-1 120629A 118 70 130 3.0 ND -Not detected at the reporting limit. U -Not detected at minimum detectable concentration Batch: GA-0542 07/04/12 10:04 07/04/12 10:04 U 07/04/12 11 :44 07/04/12 11 :44 24.2 Page 27 of 33 EI'I:RGY LABORATORIES www.energylab.com Analytical ExCSUsnCB Sines 1852 Helena, MT 877-472-071 t • Billings, MT 800-735-4489 • Casper, W'f 888-235-0515 , .. ~i!le.ttl!, WY .866-686-7175 • Rapid City, SD 888-672-1225 • College Station, lX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: 07/27/12 Project: Seeps and Springs 2012 Work Order: C12060931 Analyte Count Result Units RL %REC Low Limit High Limit RPO RPOLimit Qual Method: SW8260B Batch: R161404 Sample 10: 29-Jun-12_LCS_ 4 16 Laboratory Control Sample Run: GCMS2_120629A 06/29/12 12:33 Acetone 100 ug/L 20 101 70 130 Benzene 9.7 ug/L 1.0 97 70 130 Carbon tetrachloride 9.4 ug/L 1.0 94 70 130 Chloroform 9.6 ug/L 1.0 96 70 130 Chlorom ethane 9.1 ug/L 1.0 91 70 130 m+p-Xylenes 19 ug/L 1.0 96 70 130 Methyl ethyl ketone 100 ug/L 20 102 70 130 Methylene chloride 9.9 ug/L 1.0 99 70 130 Naphthalene 8.8 ug/L 1.0 88 70 130 o-Xylene 9.2 ug/L 1.0 92 70 130 Toluene 10 ug/L 1.0 104 70 130 Xylenes, Total 28 ug/L 1.0 94 70 130 Surr: 1,2-0ichlorobenzene-d4 1.0 103 80 120 Surr: Oibromofluoromethane 1.0 110 70 130 Surr: p-Bromofluorobenzene 1.0 105 80 130 Surr: Toluene-d8 1.0 120 80 120 Sample 10: 29-Jun-12_MBLK_6 16 Method Blank Run: GCMS2 -120629A 06/29/12 13:43 Acetone NO ug/L 20 Benzene NO ug/L 1.0 Carbon tetrachloride NO ug/L 1.0 Chloroform NO ug/L 1.0 Chloromethane NO ug/L 1.0 m+p-Xylenes NO ug/L 1.0 Methyl ethyl ketone NO ug/L 20 Methylene chloride NO ug/L 1.0 Naphthalene NO ug/L 1.0 o-Xylene NO ug/L 1.0 Toluene NO ug/L 1.0 Xylenes, Total NO ug/L 1.0 Surr: 1,2-0ichlorobenzene-d4 1.0 121 80 120 S Surr: Oibromofluoromethane 1.0 111 70 130 Surr: p-Bromofluorobenzene 1.0 136 80 120 S Surr: Toluene-d8 1.0 116 80 120 Sample 10: C12060931-003EMS 16 Sample Matrix Spike Run: GCMS2 120629A 06/29/1220:35 - Acetone 2100 ug/L 200 107 70 130 Benzene 290 ug/L 10 144 70 130 S Carbon tetrachloride 170 ug/L 10 87 70 130 Chloroform 180 ug/L 10 88 70 130 Chloromethane 150 ug/L 10 74 70 130 m+p-Xylenes 380 ug/L 10 96 70 130 Methyl ethyl ketone 2200 ug/L 200 108 70 130 Methylene chloride 170 ug/L 10 84 70 130 Naphthalene 150 ug/L 10 74 70 130 ------------------------------------------------ Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MOC -Minimum detectable concentration S -Spike recovery outside of advisory limits. Page 28 of 33 EN:RGY LABORATORIES www.energylab.com Analytical Exesllsnell Sines 1952 Helena, MT877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 " "9,~II~tte, WY866 .. ~86-717~ • Rapid City, SI} 888-672-1225 • College Station, lX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Seeps and Springs 2012 Analyte Count Result Units Method: SW8260B Sample 10: C12060931-003EMS 16 Sample Matrix Spike o-Xylene 180 ug/L Toluene 290 ug/L Xylenes, Total 570 ug/L Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: T oluene-d8 Sample 10: C12060931-003EMSO 16 Sample Matrix Spike Duplicate Acetone 2400 ug/L Benzene 190 ug/L Carbon tetrachloride 180 ug/L Chloroform 200 ug/L Chloromethane 190 ug/L m+p-Xylenes 380 ug/L Methyl ethyl ketone 2300 ug/L Methylene chloride 190 ug/L Naphthalene 170 ug/L o-Xylene 190 ug/L Toluene 220 ug/L Xylenes, Total 570 ug/L Surr: 1,2-Dichlorobenzene-d4 Surr: Dibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Qualifiers: RL -Analyte reporting limit. MDC -Minimum detectable concentration S -Spike recovery outside of advisory limits. Report Date: Work Order: RL %REC Low Limit High Limit Run: GCMS2_120629A 10 92 70 130 10 146 70 130 10 95 70 130 1.0 100 80 120 1.0 108 70 130 1.0 103 80 120 1.0 171 80 120 Run: GCMS2 120629A - 200 119 70 130 10 95 70 130 10 90 70 130 10 98 70 130 10 94 70 130 10 96 70 130 200 116 70 130 10 96 70 130 10 84 70 130 10 93 70 130 10 108 70 130 10 95 70 130 1.0 102 80 120 1.0 116 70 130 1.0 103 80 120 1.0 123 80 120 ND -Not detected at the reporting limit. R -RPD exceeds advisory limit. RPO 11 41 3.2 10 23 0.4 7.1 14 13 1.3 30 0.7 0.0 0.0 0.0 0.0 07/27/12 C12060931 RPOLimit Qual Batch: R161404 06/29/12 20:35 S S 06/29/1221 :10 20 20 R 20 20 20 R 20 20 20 20 20 20 R 20 10 10 10 10 S Page 29 of 33 EI\ERGY LABORATO RIES www.energylab.com Analytical ExcsllsnCB Sines '852 Helena,MT 877-472-071 t • Billings, MT 800-735-4489 • Casper, WV 888-235-0515 . _~illet±li, WY 866,,688-7175 • Rapid City, SI} 888-&72-1225 • College Station, TX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Project: Seeps and Springs 2012 Analyte Count Result Units Method: SW8260B Sample 10: 02-Jul-12_LCS_ 4 16 Laboratory Control Sample Acetone 100 ug/L Benzene 12 ug/L Carbon tetrachloride 12 ug/L Chloroform 13 ug/L Chlorom ethane 13 ug/L m+p-Xylenes 25 ug/L Methyl ethyl ketone 100 ug/L Methylene chloride 12 ug/L Naphthalene 9.6 ug/L o-Xylene 12 ug/L Toluene 13 ug/L Xylenes, Total 37 ug/L Surr: 1 ,2-0ichlorobenzene-d4 Surr: Oibromofluoromethane Surr: p-Bromofluorobenzene Surr: Toluene-d8 Sample 10: 02-Jul-12_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: C12060949-001 BMS 16 Sample Matrix Spike Acetone 2600000 ug/L Benzene 210000 ug/L Carbon tetrachloride 190000 ug/L Chloroform 210000 ug/L Chloromethane 260000 ug/L m+p-Xylenes 400000 ug/L Methyl ethyl ketone 2600000 ug/L Methylene chloride 210000 ug/L Naphthalene 160000 ug/L RL 20 1.0 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 1.0 20 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 200000 10000 10000 10000 10000 10000 200000 10000 10000 Report Date: 07/27/12 Work Order: C12060931 %REC Low Limit High Limit RPO RPOLimit Qual Batch: R161460 Run: GCMS2_120702A 07/02/1212:40 103 70 130 122 70 130 120 70 130 126 70 130 129 70 130 124 70 130 104 70 130 124 70 130 96 70 130 117 70 130 130 70 130 122 70 130 95 80 120 115 70 130 92 80 130 114 80 120 Run: GCMS2 120702A 07/02/12 13:50 - 121 80 120 S 107 70 130 132 80 120 S 111 80 120 Run: GCMS2_120702A 07/02/1220:43 130 70 130 98 70 130 96 70 130 104 70 130 130 70 130 97 70 130 128 70 130 103 70 130 78 70 130 ___________ • ____________________ w _______________________________________ • ___________________________________ • __________________ " ____________________ • ______ • ____________________________________________ "_ Qualifiers: RL -Analyte reporting limit. NO -Not detected at the reporting limit. MOC -Minimum detectable concentration S -Spike recovery outside of advisory limits. Page 30 of 33 EI\ERGY LABORATORIES www.energylab.com Analytical ExCSUBf/CB Sinc8 1952 .Helena, MTB77-472-071 t • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 _,J!l!I~fte, WY866-686-7t 75 • Rapid CIty, SD 888-672-1225 • College Station, IX 888-690-2218 QA/QC Summary Report Prepared by Casper, WY Branch Client: Denison Mines USA Corp Report Date: Project: Seeps and Springs 2012 Work Order: Analyte Count Result Units RL %REC Low Limit High Limit RPO Method: SW8260B Sample 10: C12060949-001 BMS 16 Sample Matrix Spike Run: GCMS2_120702A a-Xylene 190000 ug/L 10000 96 70 130 Toluene 250000 ug/L 10000 109 70 130 Xylenes, Total 590000 ug/L 10000 97 70 130 Surr: 1 ,2-Dichlorobenzene-d4 1.0 101 BO 120 Surr: Dibromofluoromethane 1.0 122 70 130 Surr: p-Bromofluorobenzene 1.0 97 BO 120 Surr: Toluene-dB 1.0 11B BO 120 Sample 10: C12060949-001 BMSO 16 Sample Matrix Spike Duplicate Run: GCMS2 -120702A Acetone 2600000 ug/L 200000 129 70 130 0.6 Benzene 250000 ug/L 10000 120 70 130 19 Carbon tetrachloride 97000 ug/L 10000 4B 70 130 66 Chloroform 210000 ug/L 10000 105 70 130 0.4 Chloromethane 290000 ug/L 10000 145 70 130 10 m+p-Xylenes 400000 ug/L 10000 97 70 130 0.6 Methyl ethyl ketone 2400000 ug/L 200000 122 70 130 4.5 Methylene chloride 220000 ug/L 10000 112 70 130 B.2 Naphthalene 160000 ug/L 10000 7B 70 130 1.0 a-Xylene 190000 ug/L 10000 96 70 130 0.4 Toluene 500000 ug/L 10000 232 70 130 66 Xylenes, Total 590000 ug/L 10000 97 70 130 0.3 Surr: 1 ,2-Dichlorobenzene-d4 1.0 102 BO 120 0.0 Surr: Dibromofluoromethane 1.0 122 70 130 0.0 Surr: p-Bromofluorobenzene 1.0 101 BO 120 0.0 Surr: Toluene-dB 1.0 233 BO 120 0.0 ----------------------- Qualifiers: RL -Analyte reporting limit. MDe -Minimum detectable concentration S -Spike recovery outside of advisory limits. ND -Not detected at the reporting limit. R -RPD exceeds advisory limit. 07/27/12 C12060931 RPOLimit Qual Batch: R161460 07/02/1220:43 07/02/1221 :1B 20 20 20 SR 20 20 S 20 20 20 20 20 20 SR 20 10 10 10 10 S Page 31 of 33 EN:RGY LABORATORIES ~J'" www.energylab.com ~ Analytical ExcsUsnc, Sines 1952 Helena, MT 877-472 .... 0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 . ,~ille{te, WY 86&-~86-7115 • Rapid City, SD 888-672-1225 • College Station, IX 888-690-2218 Standard Reporting Procedures Lab measurement of analytes considered field parameters that require analysis within 15 minutes of sampling such as pH, Dissolved Oxygen and Residual Chlorine, are qualified as being analyzed outside of recommended holding time. Solid/soil samples are reported on a wet weight basis (as received) unless specifically indicated. If moisture corrected, data units are typically noted as -dry. For agricultural and mining soil parameters/characteristics, all samples are dried and ground prior to sample analysis. Workorder Receipt Checklist Denison Mines USA Corp Login completed by: Timothy I.. Houghteling Reviewed by: BL2000\kschroeder Reviewed Date: 6/27/2012 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? (Exclude analyses that are considered field parameters such as pH, DO, Res CI, Sulfite, Ferrous Iron, etc.) ContaineriTemp Blank temperature: Water -VOA vials have zero headspace? Water -pH acceptable upon receipt? Contact and Corrective Action Comments: None Yes 0 Yes 0 Yes D Yes 0 Yes 0 Yes 0 Yes 0 Yes 0 Yes 0 Yes 0 2.2'C On Ice Yes 0 Yes 0 C12060931 Date Received: 6/22/2012 Received by: kg No D No D No D No D No D No D No D No D No D No D No D No D Carrier Next Day Air name: Not Present D Not Present D Not Present 0 No VOA vials submitted D Not Applicable D Page 32 of 33 ""'0 Q) co CD c.v c.v o -c.v c.v EN:RGY aa" Chain of Custody and Analytical Request Record Page ~ of --1- -----~ - ----~ -.. , .. - -~ -........ ----~ ----_ •••••• -•••• -~.-•• -----.P. .............. .., ..... , Company Name: Project Name, PWS, Permit, Etc. Sample Origin EPA/State Compliance: D~t\\·.son M\\ne~ See..ps ~~ S~t";tt~ 2.0\~ State: U'T' Yes ~ No 0 Report Mail Address: f6 130 )( 80~ Contact Name: Phone/Fax: Email: Sampler: (Please Print) ~ )C\Y\a; flDt ~ 0--('(' \ '" 'P ().. \ yV\ t: (" L\~S b7g ~\ ~r\~r Ao 1\: AAd \J\\ gY:;JI Invoice Address: V Invoice Contact & Phone: Purchase Order: Quote/Bottle Order: S,,~ D~\)\~ -):r\:. Ll~S G.78 ~, Special Report/Formats: ~ W@D@ lK1§®GDrn®LrrnW • Contact ELI prior to 5~ppedby: 3: f r .,.#f)t4 0 ..... RUSH sample submittal ~o U)~ ~ R for charges and Co~er 10(5): ~CQ;gOI ('fi Q ~ scheduling ~ See C,l41f ._> 0 >-1ij DDW D EDD/EDT(Electronic Data) ~en~m~ W Instruction Page 03:= ~ C) 0 :::r: "C Receipt Temp o POTWIWWTP Format: u 0 0 1:: ::r t) c Comments: ::;, U .... « CJ)ICOI32 ~ .:: 0 ;>. ? o State: o LEVEL IV o L-. I:: '-°c •• <I) c:'-:3 «l '-~1U.Q Ci l-e:: o Other: o NELAC ~~IE~ .... On Ice: Q)N « ::;, t-~~«I~O ~ W "E 5 Custody Seal Z c. Q) ~ >1 W CU On Bottle V. ~ en "'0 ~N en e:: On Cooler 0 ~ H Intact ~: 1 C/) SAMPLE IDENTIFICATION Collection Collection MATRIX ~ Signature {Name, Location, Interval, etc.} Date Time Match 1 -er'lfdo..t'lC~ ~ee.p 'i: ,/;J..O/l?.. lO'~ b-W ~ 2 ~ , \Mn ~Pf"\r'\" '/~O/I'J.. O'1;l.O , .... W )C I~ 3 ""-oJ ~/:;.c/~ 074.5 6-W y: ~ Co+-\-on\J.l()od ~1:>{';"<lt. Innn 4B~ • I ~ '/';)..6/12-O,t..t5 b-W X ~ SPl"rlll 5-(;;0 R)~l< c1t./ (, '/!lO/)~ ~ 6 -r l'.~~ K I~,.~ ~c. l'')...b(,/2 b <1'3.1 7 , . ~ 8 ~. 9 OOJ I~ 10 .td] Custody ;a~~~Y#:;\IJA~ ~~t/;\b..o\Q.. .1100 ~ s~:n=~ it IJ-L. -l Received by (print): DatefTime: Signature: Record Relinquished by (print): "" DatefTime: Signature: • V Received by (print): DatefTime: Signature: MUST be Kecelveo Dy LaDOra1Ory: C. uaIa/llme: k.J ~,gnature: Signed Sample Disposal: Return to Client: Lab Disposal: .. ;)7·ld er:s-o 1:"'> C:.:s" In certain circumstances. samples submitted to Energy Laboratories, Inc. may be subcontracted to other certified laboratories in order to complete the analysis requested. This serves as notice of this possibility. All sub·contract data will be clearly notated on your analytical report. \ 1:_:. -•.•••• ~&... _i+~ ~~ .. n ..... " ... "r,..." ... h ............... fnr .:"irlifi,.. ... .",' inftVI'YH::atinn rtrnAJnln:::art ::ahl"" f""p C:f'h""rtlll"" fnrm<: ::::ann linlce: ANALYTICAL LAaOJ~AT<>R IE-S 463 West 3600 South ;alt Lake City, UT 84115 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 ~-mail: awal@awal-Iabs.com web: www.awal-Iabs.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 2012 Dear JoAnn Tischler: Lab Set ill: 1206379 American West Analytical Laboratories received 5 sample(s) on 6/22/2012 for the analyses presented in the following report. American West Analytical Laboratories (AWAL) is accredited by The National Environmental Laboratory Association Conference (NELAC) Institute in Utah and Texas; and is state accredited in Colorado, Idaho, New Mexico, and Missouri. In addition, A W AL is also accredited by the American Analytical Laboratory Association (A2LA) on ISO IEC 17025:2005, Department of Defense (DOD), UST for the State of Wyoming, and the National Lead Laboratory Accreditation Program (NLLAP). All analyses were performed in accordance to The NELAC Institute and/or A2LA protocols unless noted otherwise. Accreditation documents are 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, Ky I e F·, Digitally signed by Kyle F. Gross ON: cn=Kyle F. Gross, o=AWAL, ou=AWAL, email=kyle@awal- G laos.com, c=US r 0 S ~Date: 2012.0:0313:38:23 -06'00' Approved by: L...-__ -il-~..:::;...~ ______ ---I Laboratory Director or designee Report Date: 7/3/2012 Page 1 of 26 All analyses applicable to the CWA, SDWA, and RCRA are perfonned in accordance to NELAC protocols. Pertinent sampling infonnation is located on the attached COCo This report is provided for the exclusive use of the addressee. Privileges of subsequent use. of t~e name of this company or any. member of its start: or reproduction of this report in. c?nnection \\lith the adverti~ement, promotion or sale .of any product or process, or in connection with the re_-publication of this report for any Client: Project: Lab Set ID: Date Received: Lab Sample ID 463 West 3600 South 1206379-001A ;alt Lake City, UT 84115 1206379-001B 1206379-002A Phone: (801) 263-8686 1206379-002B Toll Free: (888) 263-8686 1206379-003A Fax: (801) 263-8687 ~-mail: awal@awal-Iabs.com 1206379-003B 1206379-004A web: www.awal-labs.com 1206379-004B 1206379-005A Kyle F. Gross Laboratory Director Jose Rocha QA Officer SAMPLE SUMMARY Denison Mines Seeps and Springs 2012 1206379 6/22/2012 1030h Client Sample ID Entrance Seep Entrance Seep Ruin Spring Ruin Spring Cottonwood Spring Cottonwood Spring Back Spring Back Spring Trip Blank Date Collected 6/20/2012 1015h 6120/2012 1015h 6/20/2012 920h 6120/2012 920h 6120/2012 745h 6/2012012 745h 6/20/2012 745h 6/2012012 745h 6/2012012 Contact: JoAnn Tischler Matrix Analysis Aqueous VOA by GCIMS Method 8260C/5030C Aqueous ICPMS Metals, Dissolved Aqueous VOA by GCIMS Method 8260C/5030C Aqueous ICPMS Metals, Dissolved Aqueous VOA by GCIMS Method 8260C/5030C Aqueous ICPMS Metals, Dissolved Aqueous VOA by GCIMS Method 8260C/5030C Aqueous ICPMS Metals, Dissolved Aqueous VOA by GC/MS Method 8260C/5030C Report Date: 713/2012 Page 2 of26 All analyses applicable to. the CWA, SDWA, and RCRA are perfonned in accordance to NELAC pro.tocols. Pertinent sampling infonnation is located on the attached COCo This report is provided for the exclusive use o.fthe addressee. Privileges of subsequent use of the name of this company or any member of its staff, or repro.duction of this report in. c~nnection ~ith the adverti~ement, pro.motion or sale .of any product or process, or in connection with the re.-publication of t~is report for any 463 West 3600 South ;alt Lake City, UT 84115 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 ;:-mail: awal@awal-labs.com web: www.awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Inorganic Case Narrative Client: Contact: Project: Lab Set ID: Sample Receipt Information: Date of Receipt: Date of Collection: Sample Condition: C-O-C Discrepancies: Denison Mines Jo Ann Tischler Seeps and Springs 2012 1206379 6/22/2012 6/20/2012 Intact None Holding Time and Preservation Requirements: The analysis of the sample was performed within the method holding times. The sample was properly preserved. Preparation and Analysis Requirements: The sample was analyzed following the methods stated on the analytical reports. The sample was not digested pursuant to the client request. Analytical QC Requirements: All instrument calibration and calibration check requirements were met. All internal standard recoveries met method criterion. Corrective Action: None required. Report Date: 7/3/2012 Page 3 of 26 All analyses applicable to the CWA, SDWA, and RCRA are perfonned in accordance to NELAC protocols. Pertinent sampling infonnation is located on the attached COCo This report is provided for the exclusive use of the addressee. Privileges of subsequent use of t~e name ?~ this company or any member of its staff, or reproduction of this report in. c?nnection v:ith the adverti~ement, promotion or sale of any product or pro.cess, or in connection with the re.-publication of t~is. report for any 463 West 3600 South ;alt Lake City, UT 84115 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 ~-mail: awal@awal-Iabs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Volatile Case Narrative Client: Contact: Denison Mines JoAnn Tischler Project: Lab Set ID: Sample Receipt Information: Date of Receipt: Date of Collection: Sample Condition: C-O-C Discrepancies: Method: Analysis: Seeps and Springs 2012 1206379 6/22/2012 6/20/2012 Intact None SW -846 8260C/5030C Tetrahydrofuran General Set Comments: Tetrahydrofuran was not observed above reporting limits. Holding Time and Preservation Requirements: All samples were received in appropriate containers and properly preserved. The analysis and preparation of all samples were performed within the method holding times following the methods stated on the analytical reports. Analytical QC Requirements: All instrument calibration and calibration check requirements were met. All internal standard recoveries met method criterion. Batch QC Requirements: MB, LCS, MS, MSD, RPD, and Surrogates: Method Blanks (MBs): No target analytes were detected above reporting limits, indicating that the procedure was free from contamination. Laboratory Control Sample (LCSs): All LCS recoveries were within control limits, indicating that the preparation and analysis were in control. Matrix Spike 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: 7/3/2012 Page 4 of26 All analyses applicable to' the CWA, SDWA, and RCRA are perfo.nned in acco.rdance to. NELAC pro.toco.ls. Pertinent sampling info.nnatio.n is lo.cated o.n the attached COc. This repo.rt is provided fo.r the exclusive use ofthe addressee. Privileges o.f subsequent use o.fthe name o.f this co.mpany o.r any member o.f its staff; o.r reproductio.n o.fthis repo.rt in c~nnectio.n v:ith the advertisement, pro.mo.tio.n o.r sale .o.f any pro.duct o.r process, o.rin co.nnectio.n with the re.-publicatio.n o.ft~is repo.rt fo.r any INORGANIC ANALYTICAL REPORT 463 West 3600 South Client: Project: Lab Sample ID: Denison Mines Seeps and Springs 2012 1206379-001 Client Sample ID: Entrance Seep Collection Date: 6/20/2012 1015h Received Date: Analytical Results Compound 6/22/2012 1030h Units Date Prepared ;alt Lake City, UT 84115 Tin mglL Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 ~-mail: awal@awal-Iabs.com web: www.awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer This sample was not digested pursuant to the client request. Date Analyzed 6/27/2012 1l06h Contact: JoAnn Tischler DISSOLVED METALS Method Used E200.8 Reporting Limit 0.100 Analytical Result < 0.100 Qual Report Date: 7/3/2012 Page 5 of 26 All analyses applicable to the CWA, SDWA, and RCRA are perfonned in accordance to NELAC protocols. Pertinent sampling infonnation is located on the attached COCo This report is provided for the exclusive use of the addressee. Privileges of subsequent useofthe name of this company or any member of its staff, or reproduction ofthis report in. c~nnection \\lith the advertisement, pro.motion or sale of any product or process, or in connection with the re.-publication of this report for any INORGANIC ANALYTICAL REPORT 463 West 3600 South Client: Project: Lab Sample ID: Denison Mines Seeps and Springs 2012 1206379-002 Client Sample ID: Ruin Spring Collection Date: 6/20/2012 920h Received Date: Analytical Results Compound 6122/2012 1030h Units Date Prepared ;alt Lake City, UT 84115 Tin mg/L Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 ~-mail: awal@awal-Iabs.com web: www.awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer This sample was not digested pursuant to the client request. Date Analyzed 6/27/2012 1l10h Contact: JoAnn Tischler DISSOLVED METALS Method Used E200.8 Reporting Limit 0.100 Analytical Result < 0.100 Qual Report Date: 7/3/2012 Page 6 of 26 All analyses applicable to the CWA, SDW A, and RCRA are performed in accordance to NELAC protocols. Pertinent sampling information is located on the attached COe. This report is provided for the exclusive use of the addressee. Privileges of subsequent use. of t~e name of this comp'any or any member of its start: or reproduction of this report in. c~nnection \\lith the adverti~ement, pro.motion or sale .of any product or pro.cess, orin connection with the re.-publication of t~is report for any 463 West 3600 South ;alt Lake City, UT 84115 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 ~-mail: awal@awal-labs.com web: www.awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer INORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines Seeps and Springs 2012 1206379-003 Client Sample ID: Cottonwood Spring Collection Date: 6/20/2012 745h Received Date: 6/2212012 1030h Analytical Results Date Compound Units Prepared Tin mg/L This sample was not digested pursuant to the client request. Contact: JoAnn Tischler DISSOLVED METALS Date Method Reporting Analytical Analyzed Used Limit Result Qual 6127/2012 1114h E200.8 0.100 < 0.100 Report Date: 7/3/2012 Page 7 of26 All analyses applicable to the CW A, SDWA, and RCRA are perfonned in accordance to NELAC protocols. Pertinent sampling infom1ation 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. c~nnection \\lith the adverti~ement, pro.motion or sale .of any product or pro?ess, or in connection with the re.-publication oft~isreport for any 463 West 3600 South ;alt Lake City, UT 84115 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 ~-mail: awal@awal-labs.com web: www.awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer INORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines Seeps and Springs 2012 1206379-004 Client Sample ID: Back Spring Collection Date: 6/20/2012 745h Received Date: 6/22/2012 1030h Analytical Results Date Compound Units Prepared Tin mg/L This sample was not digested pursuant to the client request. Date Analyzed 6127/2012 1118h Contact: Jo Ann Tischler DISSOLVED METALS Method Reporting Analytical Used Limit Result Qual E200.8 0.100 < 0.100 Report Date: 7/3/2012 Page 8 of26 All analyses applicable to the CWA, SDWA, and RCRA are perfonned in accordance to NELAC protocols. Pertinent sampling information is located on the attached COe. This report is provided for the exclusive use of the addressee. Privileges of subsequent use of t~e name of this company or any member of its staff, or reproduction of this report in. c~nnection v:ith the adverti~ement, pro.motion or sale .of any product or pro.cess, or in connection with the re.-publication of t~is. report for any 463 West 3600 South ;alt Lake City, UT 84115 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 ~-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines Seeps and Springs 2012 1206379-001A Client Sample ID: Entrance Seep Collection Date: 6/20/2012 1015h Received Date: 6/22/2012 1030h Contact: Jo Ann Tischler Analytical Results VOAs by GC/MS Method 8260CIS030C Analyzed: 6/26/2012 829h Units: ~g/L Compound Tetrahydrofuran Surrogate Surr: Toluene-d8 Surr: Dibromofluoromethane Surr: 4-Bromofluorobenzene Surr: 1,2-Dichloroethane-d4 Dilution Factor: Method: CAS Reporting Number Limit 109-99-9 1.00 CAS Result Amount Spiked %REC 2037-26-5 44.9 50.00 89.8 1868-53-7 49.2 50.00 98.3 460-00-4 42.2 50.00 84.4 17060-07-0 49.0 50.00 98.0 SW8260C Analytical Result Qual < 1.00 Limits Qual 77-129 80-124 80-128 72-151 Report Date: 7/3/2012 Page 9 of 26 All analyses applicable to the CW A, SDW A, and RCRA are performed in accordance to NELAC protocols. Pertinent sampling information is located on the attached CDC. This report is provided for the exclusive use of the addressee. Privileges of subsequent use oft~e name of this company or any member of its staff, or reproduction of this report in. c~nnection v:ith the adverti~ement, promotion or sale .of any product or pro.cess, orin connection with the re.'publication of this report for any 463 West 3600 South ;alt Lake City, UT 84115 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 ~-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines Seeps and Springs 2012 1206379-002A Client Sample ID: Ruin Spring Collection Date: 6/20/2012 920h Received Date: 6/22/2012 1030h Contact: Jo Ann Tischler Analytical Results VOAs by GC/MS Method 8260CIS030C Analyzed: 6/2612012920h Units: Jlg/L Compound Tetrahydrofuran Surrogate SUIT: Toluene-d8 SUIT: Dibromofluoromethane SUIT: 4-Bromofluorobenzene SUIT: 1,2-Dichloroethane-d4 Dilution Factor: Method: CAS Reporting Number Limit 109-99-9 1.00 CAS Result Amount Spiked %REC 2037-26-5 45.3 50.00 90.5 1868-53-7 50.6 50.00 101 460-00-4 42.1 50.00 84.2 17060-07-0 50.9 50.00 102 SW8260C Analytical Result Qual < 1.00 Limits Qual 77-129 80-124 80-128 72-151 Report Date: 7/3/2012 Page 10 of26 All analyses applicable to the CWA, SDWA, and RCRA are perfonned in accordance to NELAC protocols. Pertinent sampling information is located on the attached COCo This report is provided for the exclusive use of the addressee. Privileges of subsequent use of the name o~ this company or any member of its staff, or reproduction of this report in. c~nnection v:ith the adverti~ement, pro.motion or sale of any product or pro. cess, or in connection with the re.-publication of t?isreport for any 463 West 3600 South ;alt Lake City, UT 84115 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 3-mail: awal@awal-Iabs.com web: www.awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines Seeps and Springs 2012 1206379-003A Client Sample ID: Cottonwood Spring Collection Date: 6/20/2012 745h Received Date: 6/22/2012 1030h Contact: Jo Ann Tischler Analytical Results VOAs by GC/MS Method 8260C/5030C Analyzed: 6126/2012 1036h Units: IlglL Compound Tetrahydrofuran Surrogate SUIT: Toluene-d8 Surr: Dibromofluoromethane SUIT: 4-Bromofluorobenzene SUIT: 1,2-Dichloroethane-d4 Dilution Factor: Method: CAS Reporting Number Limit 109-99-9 1.00 CAS Result Amount Spiked %REC 2037-26-5 45.8 . 50.00 91.5 1868-53-7 49.5 50.00 99.0 460-00-4 42.8 50.00 85.7 17060-07-0 49.6 50.00 99.2 SW8260C Analytical Result Qual < 1.00 Limits Qual 77-129 80-124 80-128 72-151 Report Date: 7/3/2012 Page 11 of 26 All analyses applicable to the CW A, SDW A, and RCRA are performed in accordance to NELAC protocols. Pertinent sampling information is located on the attached COc. This report is provided for the exclusive use ofthe addressee. Privileges of subsequent use of the name of this company or any member of its staff; or reproduction of this report in. c(mnection ""ith the adverti~ement, pro.motion or sale .of any product or process, or in connection with the re.-publication of t?is report for any 463 West 3600 South ;alt Lake City, UT 84115 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 ~-mai1: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines Seeps and Springs 2012 1206379-004A Client Sample ID: Back Spring Collection Date: 6/2012012 745h Received Date: 6/22/2012 1030h Contact: JoAnn Tischler Analytical Results VOAs by GC/MS Method 8260CIS030C Analyzed: 6/2612012 1101h Units: Jlg/L Compound Tetrahydrofuran Surrogate Surr: Toluene-d8 Surr: Dibromofluoromethane Surr: 4-Bromofluorobenzene Surr: 1,2-Dichloroethane-d4 Dilution Factor: Method: CAS Reporting Number Limit 109-99-9 1.00 CAS Result Amount Spiked %REC 2037-26-5 44.8 50.00 89.6 1868-53-7 49.6 50.00 99.3 460-00-4 41.3 50.00 82.6 17060-07-0 49.4 50.00 98.9 SW8260C Analytical Result Qual < 1.00 Limits Qual 77-129 80-124 80-128 72-151 Report Date: 7/3/2012 Page 12 of26 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 t~e name of this company or any member of its staff, or reproduction of this report in. c~nnection ""ith the adverti~ement, pro. motion or sale .of any product or process, or in connection with the re.-publication of t~is report for any 463 West 3600 South ;alt Lake City, UT 84115 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 ~-mail: awal@awal-labs.com web: www.awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer ORGANIC ANALYTICAL REPORT Client: Project: Lab Sample ID: Denison Mines Seeps and Springs 2012 1206379-005A Client Sample ID: Trip Blank Collection Date: 6/20/2012 Received Date: 6/22/2012 1030h Contact: Jo Ann Tischler Analytical Results VOAs by GC/MS Method 8260CIS030C Analyzed: 6/2612012 1127h Units: /-lg/L Compound Tetrahydrofuran Surrogate Surr: Toluene-d8 Surr: Dibromofluoromethane Surr: 4-Bromofluorobenzene Surr: 1,2-Dichloroethane-d4 Dilution Factor: Method: CAS Reporting Number Limit 109-99-9 1.00 CAS Result Amount Spiked %REC 2037-26-5 45.2 50.00 90.4 1868-53-7 51.3 50.00 103 460-00-4 42.3 50.00 84.5 17060-07-0 51.8 50.00 104 SW8260C Analytical Result Qual < 1.00 Limits Qual 77-129 80-124 80-128 72-151 Report Date: 7/3/2012 Page 13 of26 All analyses applicable to the CW A, SDW A, and RCRA are perfonned in accordance to NELAC protocols. Pertinent sampling infonnation is located on the attached COC. This report is provided for the exclusive use ofthe addressee. Privileges of subsequent use of the name of this company or any member of its staft; or reproduction of this report in. c?nnection v:ith the adverti~ement, pro.motion or sale .of any product or pro.cess, or in connection with the re.-publication of t~is report for any Client: Denison Mines Lab Set ID: 1206379 Project: Seeps and Springs 2012 SampleID Analyte LCS VOC 062612A Tetrahydrofuran LCS VOC 062612A SUIT: 1,2-Dichloroethane-d4 LCS VOC 062612A SUIT: 4-Bromofluorobenzene LCS VOC 062612A SUIT: Dibromofluoromethane LCS VOC 062612A 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_SJJMMARX_RE_fQl~~I_ Contact: JoAnn Tischler Dept: MSVOA QC Type: LCS Amount Original Units Method Result Spiked Amount %REC Limits IlglL SW8260C 16.0 20.00 0 80.1 43-146 %REC SW8260C 48.3 50.00 96.5 76-138 %REC SW8260C 42.2 50.00 84.5 77-121 %REC SW8260C 51.2 50.00 102 67-128 %REC SW8260C 45.2 50.00 90.5 81-135 %RPD RPD Limit Kyle F. Gross Laboratory Director Jose Rocha QA Officer Qual Date Analyzed 6/26/2012 713h 6/26/2012 713h 6/26/2012 713 h 6/26/2012 713h 6/2612012 713h Report Date: 7/312012 Page 14 of26 I analyses applicable to the CWA, SDW A, 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 mber 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 Client: Denison Mines Lab Set ID: 1206379 Project: Seeps and Springs 2012 Sample ID Analyte MB VOC 062612A Tetrahydrofuran MB VOC 062612A SUIT: 1,2-Dichloroethane-d4 MB VOC 062612A SUIT: 4-Bromofluorobenzene MB VOC 062612A SUIT: Dibromofluoromethane MB VOC 062612A SUIT: Toluene-d8 463 West 3600 South Salt Lake City, UT 84115 Phone: (80l) 263-8686, Toll Free: (888) 263-8686, Fax: (80l) 263-8687 e-mail: awal@awal-Iabs.com, web: www.awal-Iabs.com QC ___ SILM_MARY __ RE_PQRI __ _ Contact: JoAnn Tischler Dept: MSVOA QC Type: MBLK Amount Original Units Method Result Spiked Amount %REC Limits /lglL SW8260C < 1.00 %REC SW8260C 49.6 50.00 99.2 76-l38 %REC SW8260C 42.7 50.00 85.3 77-121 %REC SW8260C 49.8 50.00 99.7 67-128 %REC SW8260C 45.2 50.00 90.5 81-135 %RPD RPD Limit Kyle F. Gross Laboratory Director Jose Rocha QA Officer Qual Date Analyzed 6/26/2012 804h 6/26/2012 804h 6/26/2012 804h 6/26/2012 804h 6/26/2012 804h Report Date: 7/3/2012 Page 15 of 26 I analyses applicable to the CW A, SDW A, 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 mber 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 Client: Denison Mines Lab Set ID: 1206379 Project: Seeps and Springs 2012 SampleID Analyte 1206379-001AMS Tetrahydrofiuan 1206379-001AMS Surr: 1,2-Dichloroethane-d4 1206379-001AMS Surr: 4-Bromofluorobenzene 1206379-001 AMS Surr: Dibromofluoromethane 1206379-001 AMS 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 ~£_BJIM_MARY ~POJ~~~I_ Contact: Jo Ann Tischler Dept: MSVOA QC Type: MS Amount Original Units Method Result Spiked Amount %REC Limits /lglL SW8260C 14.4 20.00 0 72.0 43-146 %REC SW8260C 51.5 50.00 103 72-151 %REC SW8260C 41.5 50.00 83.0 80-128 %REC SW8260C 52.0 50.00 104 80-124 %REC SW8260C 45.0 50.00 90.1 77-129 %RPD RPD Limit Kyle F. Gross Laboratory Director Jose Rocha QA Officer Qual Date Analyzed 6/26/2012 945h 6/26/2012 945h 6/2612012 945h 6/2612012 945h 6126/2012 945h Report Date: 7/3/2012 Page 16 of 26 I analyses applicable to the CWA, SDW A, and RCRA are perfonned in accordance to NELAC protocols. Pertinent sampling infonnation is located on the attached COCo This report is provided for the exclusive use of the addressee. Privileges of subsequent use of the name of this company or any mber 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 ~. Client: Denison Mines Lab Set ID: 1206379 Project: Seeps and Springs 2012 Sample ID Analyte 1206379-001AMSD Tetrahydrofuran 1206379-001AMSD Surr: 1,2-Dichloroethane-d4 1206379-001 AMSD Surr: 4-Bromofluorobenzene 1206379-001 AMSD Surr: Dibromofluoromethane 1206379-001 AMSD Surr: Toluene-d8 463 West 3600 South Salt Lake City, Dr 84115 Phone: (801) 263-8686, Toll Free: (888) 263-8686, Fax: (801) 263-8687 e-mail: awal@awal-labs.com, web: www.awal-Iabs.com __ Q_C _S_UMMARY __ REl~QRI _ Contact: JoAnn Tischler Dept: MSVOA QC Type: MSD Amount Original Units Method Result Spiked Amount %REC Limits IlgiL SW8260C 13.3 20.00 0 66.3 43-146 %REC SW8260C 49.9 50.00 99.8 72-151 %REC SW8260C 42.4 50.00 84.9 80-128 %REC SW8260C 51.9 50.00 104 80-124 %REC SW8260C 45.1 50.00 90.2 77-129 %RPD 8.24 RPD Limit 25 Kyle F. Gross Laboratory Director Jose Rocha QA Officer Qual Date Analyzed 6/26/2012 10 11 h 6/2612012 1011h 6/26/2012 1011h 6/26/2012 1011h 6/26/2012 1011h Report Date: 7/3/2012 Page 17 of 26 I 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 mber 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 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\JUN12-D\26JUN12\ F10L3791.D 26 Jun 2012 8:29 am AH 1206379-001A SAMP 5.0ML 10F3 SB 6 Sample Multiplier: 1 Jun 26 08:42:14 2012 C:\MSDCHEM\1\METHODS\DFULLW_01.M VOA Calibration Fri May 18 13:38:02 2012 Initial Calibration (QT Reviewed) !Abundance TIC: F10L3791.D\data.ms I 28000001 I 1 2700000j I 26000001. 2500000 2400000 2300000j I :~:::::I I 20000001 19000001 1800000J I 1700000j I I 16000001 I 15000001 1400000 1 I 13000001 i 1200000j 11000001 1 1000000j 900000.J 1 800000 I 7000001 j 6000001 5000001 I 400000j DFULLW_01.M Tue Jun 26 11:48:25 2012 CI) aj d: c ~ -0 ~ ~ CJ) ..f "0 cb C ~ Q) .c I u; ~ "0 cD c CJ) ~ g c Q) ~ .c 0 c 0 Q) .c ~ ~ () 0 Cl ~ ~ :g !{2 E ~ !XI l::: ~ CJ) Page: 4 Report Date: 7/3/2012 Page 18 of26 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\data\JUN12-D\26JUN12\ F12L3792.D 26 Jun 2012 9:20 am AH 1206379-002A SAMP 5.0ML 10F3 SB 8 Sample Multiplier: 1 Quant Time: Jun 26 09:32:10 2012 Quant Method C:\MSDCHEM\1\METHODS\DFULLW_01.M Quant Title VOA Calibration QLast Update Fri May 18 13:38:02 2012 Response via Initial Calibration (QT Reviewed) Abundance , I TIC: F12L3792.D\data.ms 2700000j i ; 26000001 25000001 24000001 23000001 I 22000001 I 2100000i I 20000001 i 19000001 I 18000001 1 1700000~ : :::::: '1 1 I II j II 1400000 ai II I ~ il'l 1300000j I I g II 12000001 ~ I I ~ I' 1100000j I 10000001 Ii 1 00 ::::::1 ji ll 7000001 j ! 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I Ok, ' , ; , I I , I I I ii, , , I , , '1-,Tr'r-';--<--'----r-l-~"+' T'-TTTTTIJ.~-rrl.-r"Jll-'n-,r+~-'n-J~i··f""'f"'i=:r=;~~T""F"'T-y:::r...:r,::;=,rTT--r--r=:r.::'r:;::T---::;-::;::=r:::.:;:::~'-;~'-;---;- _ L~,_~~illL _ ?~Q _~·OQ, __ ~~~JL'tQ9 __ 4_.,§O ~:Qg _ §~§Q ___ §._Q_Q~_.,§'Q_ Z.~QQ.. __ Z~§Q ____ ~.OQ §-!_§Q ~~QQ __ ~:§9_,lQJ)9 1QJ)g Uj)Jl l L§Q_ DFULLW_01.M Tue Jun 26 11:50:50 2012 Page: 4 Report Date: 7/3/2012 Page 19 of26 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\JUN12-D\26JUN12\ F15L3793.D 26 Jun 2012 10:36 am AH 1206379-003A SAMP 5.0ML 10F3 SB 11 Sample Multiplier: 1 Jun 26 10:48:25 2012 C:\MSDCHEM\1\METHODS\DFULLW_01.M VOA Calibration Fri May 18 13:38:02 2012 Initial Calibration (QT Reviewed) Abundance-----------_. --------------------------------------TTc:-F15L3793~b\aata:ms ------------------------------------------------------- i 28000001 1 i 2700000j 26000001 2500000j 1 2400000j i 23000001 1 2200000j I 2100000i I 20000001 I 19000001 i 1800000j 1700000j I 16000001 1 15000001 I 1400000: 13000001 1200000: ! 1100000j I 10000001 ; 900000j 8000001 i 7000001 I 600000j 5000001 I 4000001 300000i i 2000001 en q) c: ~ a; E e 0 ::J '5 E e .0 i:5 :: ::J en DFULLW_01.M Tue Jun 26 11:55:40 2012 en q) c: (Q r. a; e 0 ::c: <.> i:5 ~- ~ en Page: 4 Report Date: 7/3/2012 Page 20 of 26 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\JUN12-D\26JUN12\ F16L3794.D 26 Jun 2012 11:01 am AH 1206379-004A SAMP 5.0ML 10F3 SB 12 Sample Multiplier: 1 Jun 26 11:13:46 2012 C:\MSDCHEM\l\METHODS\DFULLW_Ol.M VOA Calibration Fri May 18 13:38:02 2012 Initial Calibration (QT Reviewed) Abundance 2800000j TIC: F16L3794.D\data.ms 2700000j 26000001 25000001 i j 2400000 1 23000001 2200000 i 1 2100000j I 2000000j 1 1900000! i 18000001 i I 17000001 I 16000001 j i 1500000j I 14000001 13000001 i 1200000j I 11000001 1000000 900000 j ! 800000i i 700000j I 6000001 I 500000j i 4000001 1 en ~ «I .s:: en Q) ai E r: e jg g Q) 'E ~ E ~ e H .e is is ~ :s en :l en 3000001 :1 ii 200000 il: II '"II, II ..; "0 cb r: ~ Q) .0 f ~ .n ~ "0 l cb r: Ul ~ cxi en I "0 Q) ~ cb .0 r: e Q) Q) 0 N :l :c r: (5 U OIl l-.e 0 e :s I-0 en !t2 :l I 'E I E e OJ 15 ! en I :i " ii 10000:~""" "" """", '~'".~'!~~~~.~'~.~'r.Jl~~-,-, ~~~9~~~~~~~~~~~~~ [ime_~.::~_L§Q . _?~.QQ_ g._§_<l. __ ~. 09_ . _~~§~L __ 1~Q~ ___ ,t§_<l ___ ~<l<l _~§Q ___ ~~Q9 ____ ~~?g___?~Q_Q_. ___ Z~§Q__~&Q_ _ _?_~§Q___~: 00 __~§<l_JQ.:9Q_1Q~§~_1.LQQ_JL§'0_ DFULLW_Ol.M Tue Jun 26 11:56:34 2012 Page: 4 Report Date: 7/3/2012 Page 21 of 26 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\JUN12-D\26JUN12\ F17L3795.D 26 Jun 2012 11 :27 am AH 1206379-005A SAMP 5.0ML 10F3 SB 13 Sample Multiplier: 1 Jun 26 11:39:15 2012 C:\MSDCHEM\1\METHODS\DFULLW_01.M VOA Calibration Fri May 18 13:38:02 2012 Initial Calibration (QT Reviewed) Abundance TIC: F17L3795.D\data.ms , 2800000j I 27000001 i 26000001 I 25000001 I 24000001 I I 2300000i ! 2200000i j 21000001 20000001 i I 1900000i I 18000001 I 17000001 16000001 ! 1500000j 1400000! 1 13000001 12000001 I 11000001 I 10000001 ! 900000j I 8000001 I 7000001 I 6000001 I 500000j I 400000j I 1 300000j en cD t: .:g a; E e g 15 E e .c is ::: :::> en en g 11 a; e 0 :c .9 0 N. :; en 200000j II l,rl" i ...; "9 Q) t: ~ Q) J:J f J2 "fi t.ri' ~ "'0 m Q, t: Q) N (I) t: en t:I5 Q) ..Q cD "'0 e Q, t: 0 Q) t: :c ~ Q) :::> () Q) (5 0 ..Q I--I--e :; !l1 0 :::> en 15 E e III :::> en 1000001 II II ii, 01. , 1 ' , , , ; , -TT-rrrrr..,.L\-·r·, )~~~--l--r!-n'-rT!.L~+TrT· ,~, T --.. ~:\... l--T',-i·~~i-T""F1"=fT=f"'''T'T::f::-F::;:'~rrl:=T'-l.:.:r=;:::l::::n::nl:::r::::;:';::::-;::f=:"-::~ ! 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JL§Q._i DFULLW_01.M Tue Jun 26 11:57:35 2012 Page: 4 Report Date: 7/3/2012 Page 22 of26 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\JUN12-D\26JUN12\ F07LCS20.D 26 Jun 2012 7:13 am AH LCS VOC 062612A (QT Reviewed) LCS SEE COVERSHEET FOR ID AND AMOUNTS JO 3 Sample Multiplier: 1 Jun 26 07:43:18 2012 C:\MSDCHEM\1\METHODS\DFULLW_01.M VOA Calibration Fri May 18 13:38:02 2012 Initial Calibration Abundance 4400000 ---------------------------TIC:-F07LCS20.D\data~ms--------------------------------------------------------, 4200000 4000000 3800000 3600000 3400000 3200000 3000000 2800000 2600000 2400000 2200000 2000000 1800000 1600000 1400000 1200000 ' 1000000 , 800000 , i 600000 1 400000 , I 200000! i I, 0:: ~-~ I ~ C$ i ~ III ~ E e 0 Q) .a ~ ~Q)§ ,-IQ) Q)~:C: ~ ~fij 5-E·g E~I-~ ,..:~ 0'-£ g ~O Cll::E () UJ -c .2 01;, I Q) I:: Q)I/) -<:1:: ~ ~I o -- 0-<: -<:0 I i~ -B ~~ ~ t:~ <[I 2< 0::_ iii I -£ fr !I i I' f ~ "I £!. .. I Jl. ,- 'I I 'I I [lrrr~:? __ L~Q __ ~~QQ _ _?_~~Q _~Q9__~~§_Q __ 1~QJL ___ 'L~Q ____ §~QQ _____ §~§Q __ J~&Q ___ ~§Q __ L9~_.L~Q __ ~OO _Jh~ ___ 9.00 ___ ~~50 __ JQ~~L1Q~~Q .J _1.0(L 1 L§Q._ DFULLW_01.M Tue Jun 26 07:43:42 2012 Page: 4 Report Date: 7/3/2012 Page 23 of 26 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via Abundance 2800000 1 I 2700000 ! I 26000001 : 2500000 j i 2400000 j 2300000 j j 2200000 1 1 2100000 1 1 20000001 19000001 18000001 1700000i 1600000i 1500000j 1400000i i 1300000i I I 1200000i 1 11000001 10000001 ! 900000\ 8000001 700000 ! 6000001 500000 ) J 400000 1 300000 ] 200000\ Quantitation Report C:\msdehem\1\data\JUN12-D\26JUN12\ F09LMBLK.D 26 Jun 2012 8:04 am AH MB VOC 062612A MBLK 5.0ML JO 5 Sample Multiplier: 1 Jun 26 08:15:54 2012 C:\MSDCHEM\1\METHODS\DFULLW_01.M VOA Calibration Fri May 18 13:38:02 2012 Initial Calibration (QT Reviewed) TIC: F09LMBLK.D\data.ms CIl ai a: c ~ "0 I-::: ::l en en ~ nI .s::: en a; E cD c E nI g .s::: a; '5 E E 0 E :c: ,!.! .c Cl is ~. ::: ::l en 15 en o.ri' "0 d> c Q) ~ Q) ..c E .2 .s::: 0 Cl I-!:Q !I Ii !I !I en cD c Ql N C Ql ..c E 0 ::l '5 E E In ::l en ..r -0 d> c re c Q) ..c ~ ~ qi '1. m I I 'I 1000001 I ] 0.1 i ' I ~-. -, -, -'~T,~~,)L!L, 'rr,J,LCT~~,A-r~~-'-'-'''''''T".:r''-l='F"i'''i'T"=]=l=T'l':.r~:::;=;C::T'::;=~':::]':~:'::;=~:::;::T:;::'~:::-~:':';-:::;::;:::;: i [l~~:-~~_.t2.Q ___ .?~Qg __ .~~~L ... ;1:00 ._~_.:§Q ... _~LQQ __ . ..t§Q,-.§.:Q.Q ,-?~2.Q. __ .§..QQ. __ §.:.5J2...l.:.QJL .. l~9 ._~:9Q __ -,J3_&Q_ . ~~QQ ____ ~50_J O:OQ. _J9~5.Q~1~Q_ 1:L~Q_i DFULLW_01.M Tue Jun 26 11:47:03 2012 Page: 4 Report Date: 7/3/2012 Page 24 of26 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quantitation Report C:\msdehem\1\data\JUN12-D\26JUN12\ F13S3791.D 26 Jun 2012 9:45 am AH 1206379-001AMS MS 5.0ML 10F3 SB 9 Sample Multiplier: 1 Quant Time: Jun 26 11:52:10 2012 Quant Method C:\MSDCHEM\1\METHODS\DFULLW_01.M Quant Title VOA Calibration QLast Update Fri May 18 13:38:02 2012 Response via Initial Calibration (QT Reviewed) Abundance TIC: F13S3791.D\data.ms 4000000 3800000 3600000, 3400000! 3200000! ! 3000000: i I 2800000 : i I 2600000 2400000 2200000 2000000 1400000 1200000 1000000 8000001 600000 400000 20 a) c: ~ Q) ..0 e o ::l u:: Cl ~ en fI) ~ cxi "C CD N cD c: c: CD CD ..0 ::l e 15 0 r-::l ::l '5 E en e al ~ en I 1'1 L§Q __ ~Q~ ___ ?~_§Q ___ ;tQ_Q __ ~~~_Q ___ 4JlQ ___ 4J5.Q __ §~QQ ___ 5.50 ___ '§~QQ __ §.:_~!L L 9_Q ___ I 5Q ___ !!.gQ_ DFULLW_Ol.M Tue Jun 26 11:52:39 2012 Page: 4 Report Date: 7/3/2012 Page 25 of 26 Data Path Data File Aeq On Operator Sample Mise ALS Vial Quant Time: Quant Method Quant Title QLast Update Response via Abundance 3800000 3 2800000 1800000 II: aD 6()O()()()iS< ~ I 4Q!OOIJOifi [i Quantitation Report C:\msdehem\1\data\JUN12-D\26JUN12\ F14D3792.D 26 Jun 2012 10:11 am AH 1206379-001AMSD MSD 5.0ML 10F3 SB 10 Sample Multiplier: 1 Jun 26 11:53:41 2012 C:\MSDCHEM\1\METHODS\DFULLW_01.M VOA Calibration Fri May 18 13:38:02 2012 Initial Calibration (QT Reviewed) TIC: F14D3792.D\data.ms '" (J) cO <D "9 <: Q) :!l <: <: Q) Q) ::J .0 '0 E f-0 ::J ::J '5 (J) E E m t: ::> (J) I I iIlr:D~_~-~ ___ L~!L.1~QQ ____ g_&~ __ ~JlJL ~~~Q ___ ~QQ___ 1_~§_Q ____ 5.0~ __ ~~§~ ____ §~QQ __ 6.5<l ___ L~ __ 7 .5Q_J3~QQ ___ ~~~_Q __ ~~QQ ___ 9.50 __ JQ_~QQ __ 1Q!?~ J1JlQ __ l 1&9_! DFULLW_01.M Tue Jun 26 11:54:04 2012 Page: 4 Report Date: 7/3/2012 Page 26 of 26 American West Analytical Laboratories WORK ORDER Summary Client: Client ID: Project: Denison Mines DEN 1 00 Seeps and Springs 2012 Contact: JoAnn Tischler QC Level: LEVEL III UL Denison Work Order: 1206379 Page 1 of 1 6/22/2012 WOType: Project Comments: PA Rush. QC 3 & Summary. EDD-EIM into Locus Database. Report THF to 1 /lglL. Samples for metals are field filtered.; l)f> Sample ID 1206379-001A 1206379-001B 1206379~002A 1206379-002B 1206379~003A 1206379-003B 1206379-004A 1206379-004B 1206379-00SA Client Sample ID Entrance Seep SEL Analytes: SN Ruin Spring SEL Analytes: SN Cottonwood Spring SEL Analytes: SN Back Spring SEL Analytes: SN Trip Blank Collected Date 6/20/2012 10 15h 6120/20120920h 6/20120120745h 6/20/2012 FOR LABORATORY USE ONLY [fill out on page 1]: %M ~ RT l!f eN Received Date Date Due 6122/20121030h 7/3/2012 --- Matrix Test Code Sel Storage Aqueous 8260-W ~ VOCFridge 3 200.8~DIS ~ df ~ dis met 8260~W ~ VOCFridge 3 200.8-DIS ~ df ~ dis met 8260-W ~ VOCFridge 3 200.8-DIS ~ df ~ dis met 8260-W ~ VOCFridge 3 200.8-DIS ~ df ~ dis met 8260-W ~ VOCFridge 3 HOK __ HOK __ _ Sheet 1 of 1 CHAIN OF CUSTODY Samples Shipped to: American West Analytical Lab 463 West 3600 South Contact: Garrin Palmer or David Turk Ph: 4356782221 p . t rOJec Seeps and Springs 2012 Sample 10 Enterance Seep Ruin Spring Cottonwood Spring Back Spring Trip Blank Salt Lake City, Ut 84115 goalmer@denisonmines.com dturk@denisonmines.com thol! iday@denisonmines.com Chain of Custody/Sampling Analysis Request S amp ers N arne s amp ers Ignature Tanner Holliday 0~)fJJk '-./ Date Time Collected Collected Laboratory Analysis Requested 6/20/2012 1015 THF, TIN 6/20/2012 920 THF, TIN 6/20/2012 745 THF, TIN 6/20/2012 745 THF, TIN 6/20/2012 0~~~c\ Ti\\ rD L-Ltl:tl '~ r D--L~ i()~ ~rvcicl.d ~ u ;iY(2-, ~h,I2-'2.J l~ '/ ~t\Q~ ~ -\-~l ~~ \,~ \d .. +=t \~ N"€d oL\\ ~~ *-l'\._t \ l .. t~e 1 \l\e.'\ .-DlS t:. 11-21/ 12. I J I Please notify Garrin Palmer or Tanner Holliday of Reciept tempature on these samples Immediately! Thank you. Relinquished By:(Signature) .::J dflN/L-J/.,r I ~/n"UflA/," DatelTime Received By:(Sig 6/21/2012 1100 DatelTime Lab Set ID t2tXo~l9 SallJ.ples Were: coe Tape Was: Container Type: l!J"Shipped By: Re\ ~"L prezon Outer Package D A W AL Supplied Plastic / D Hand Delivered I !D es DNa D NI A D A W AL Supplied Clear Glass / D Al]).biel'lt Unb~ on Outer package D A WAL Supplied Amber Glass / ~lilled ~Yes DNo DN/A Temperature ti.1S DC presen~ Sample o A WAL Supplied VOA/=X Vials D Amber D Clear D Head ace DNo Headspace Rec. Broken/Leaking DYes B1'fo DN/A D Yes No DN/A D N on A W AL SUjJpl»x(Contailler Notes: Properly Preserved Notes: Rec. Within Hold Notes: Bottle Type Ammonia COD Cyanide Metals N02 &N03 Nutrients O&G Phenols Sulfide TKN TOC TP04 TPH Procedure: 1) 2) 3) 4) 5) 6) 7) /' unbroken~ Sample DYes rn 0 ON/A ~es DNo DN/A Notes: / ~es DNo Preservative All pHs OK '""CD\ -002- pH <2 I-hS04 pH <2 H2SO4 PH>12 NaOH pH<2HN03 \/P.e, ~~ pH <2 H2SO4 I -, pH <2 H2SO4 pH<2HCL pH <2 H2SO4 pH> 9NaOH, ZnAC pH <2 H2SO4 pH <2 H3P04 pH <2 H2SO4 pH <2HCL ~ Pour a small amount of sample in the sample lid Pour sample from Lid gently over wide range pH paper Do Not dip the pH paper in the sample bottle or lid -oo? --00-\ l"\l~ \t?b , r / Discrepancies Between Labels and COC Notes: 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 Place client conversation on coe Samples may be adjusted at client request tL ;.Mo. Rec. II I DYes [)..MD· 463 West 3600 South ;alt Lake City, UT 84115 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 ~-mail: awal@awal-labs.com web: www.awal-Iabs.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 2012 Dear JoAnn Tischler: Lab Set ill: 1207214 American West Analytical Laboratories received 4 sample(s) on 7/16/2012 for the analyses presented in the following report. American West Analytical Laboratories (AWAL) is accredited by The National Environmental Laboratory Association Conference (NELAC) Institute in Utah and Texas; and is state accredited in Colorado, Idaho, New Mexico, and Missouri. In addition, A W AL is also accredited by the American Analytical Laboratory Association (A2LA) on ISO IEC 17025:2005, Department of Defense (DOD), UST for the State of Wyoming, and the National Lead Laboratory Accreditation Program (NLLAP). All analyses were performed in accordance to The NELAC Institute andlor A2LA protocols unless noted otherwise. Accreditation documents are available upon request. If you have any questions or concerns regarding this report please feel free to call. The abbreviation "Surr" found in organic reports indicates a surrogate compound that is intentionally added by the laboratory to determine sample injection, extraction, andlor purging efficiency. The "Reporting Limit" found on the report is equivalent to the practical 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, f'i Kyl e F '~ D;g""y,;g",dbyK"".G,~, \DN: cn=Kyle F. Gross, o=AWAL, 9.u=AWAL, email=kyle@awal- G l labs.com, c=us r 0 S S />_"Daie: 2(jj~23 14:09:42 -06'00' ZI Approved by: Laboratory Director or designee Report Date: 7/23/2012 Page 1 of7 All analyses applicable to the CWA, SDW A, and RCRA are perfonned in accordance to NELAC protocols. Pertinent sampling infom1ation is located on the attached COc. This report is provided for the exclusive use of the addressee. Privileges of subsequent use oft~e name of this company or any member of its staff, or reproduction of this report in. connection with the adverti~ement, pro.motion or sale of any product or process, orin connection with the re.-publication ofthis report for any American West ANALYTICAL LABORATOR IES 463 West 3600 South ;alt Lake City, UT 84115 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 ~-mail: awal@awal-labs.com web: www.awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer SAMPLE SUMMARY Client: Project: Lab Set ID: Denison Mines Seeps and Springs 2012 1207214 Date Received: 7/16/2012945h Lab Sample ID Client Sample ID 1207214-001A Enterance Seep 1207214-002A Ruin Spring 1207214-003A Cottonwood Spring 1207214-004A Back Spring Contact: JoAnn Tischler Date Collected Matrix Analysis 6/2012012 1015h Aqueous-ICPMS Metals, Dissolved 612012012 920h Aqueous-ICPMS Metals, Dissolved 6/20/2012 745h Aqueous-ICPMS Metals, Dissolved 612012012 745h Aqueous-ICPMS Metals, Dissolved Report Date: 7/23/2012 Page 2 of 7 All analyses applicable to. the CWA, SDW A, and RCRA are perfo.nned in acco.rdance to. NELAC pro.to.co.ls. Pertinent sampling info.nnatio.n is Io.cated o.n the attached CDC. This repo.rt is provided fo.r the exclusive use o.fthe addressee. Privileges o.f subsequent use o.f the name o.fthis co.m)Jany o.r any member o.f its staff, o.r repro.ductio.n o.f this repo.rt in. c~nnectio.n ,,:,ith the adverti~ement, pro.mo.tio.n o.r sale of any product or process, o.r in co.nnectio.n with the re.-publicatio.n o.f t~is repo.rt fo.r any American West ANA LYTI CA L LAB ORATORIES 463 West 3600 South ;alt Lake City, UT 84115 Phone: (801)263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 ~-mail: awal@awal-labs.com web: www.awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer Inorganic Case Narrative Client: Contact: Project: Lab Set ID: Sample Receipt Information: Date of Receipt: Date of Collection: Sample Condition: C-O-C Discrepancies: Denison Mines Jo Ann Tischler Seeps and Springs 2012 1207214 7116/2012 6/20/2012 Intact None Holding Time and Preservation Requirements: The analysis of all samples was performed within the method holding times. All samples were properly preserved. Preparation and Analysis Requirements: The samples were analyzed following the methods stated on the analytical reports. The samples were not digested pursuant to the client request. Analytical QC Requirements: All instrument calibration and calibration check requirements were met. All internal standard recoveries met method criterion. Corrective Action: None required. Report Date: 7/23/2012 Page 3 on All analyses applicable to the CWA, SDW A, and RCRA are perfonned in accordance to NELAC protocols. Pertinent sampling infonnation is located on the attached COc. This report is provided for the exclusive use of the addressee. Privileges of subsequent useoft~e name of this company or any member of its staff? or reproduction ofthis report in c?nnection with the adverti~ement, pro.motion or sale.of any product or process, orin connection with the re.-publication of this report for any INORGANIC ANALYTICAL REPORT American West ANALYT ICAL LABORATORIES 463 West 3600 South Client: Project: Lab Sample ID: Denison Mines Seeps and Springs 2012 1207214-001 Client Sample ID: Enterance Seep Collection Date: 6/2012012 1015h Received Date: 711612012 .945h Analytical Results Compound Units Date Prepared ~alt Lake City, UT 84115 Tin mgIL Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 ~-mail: awal@awal-labs.com web: www.awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer This sample was not digested pursuant to the client request. Date Analyzed 7/2112012 1844h Contact: Jo Ann Tischler Method Used E200.8 DISSOLVED METALS Reporting Limit 0.p0500 Analytical Result < 0.00500 Qual Report Date: 7/23/2012 Page 4 of7 All analyses applicable to the CWA, SDW A, and RCRA are perfonned in accordance to NELAC protocols. Pertinent sampling infoffilation is located on the attached COc. This report is provided for the exclusive use of the addressee. Privileges of subsequent use oft~e name of this comjlany or any member of its staff, or reproduction of this report in. c?nnection v:ith the advertisement, pro.motion or sale .of any product or process, or in connection with the re.-publication oft?is report for any INORGANIC ANALYTICAL REPORT American West ANALYTI CAL LABOR ATO RIES 463 West 3600 South Client: Project: Lab Sample ID: Denison Mines Seeps and Springs 2012 1207214-002 Client Sample ID: Ruin Spring Collection Date: 6120/2012 920h Received Date: Analytical Results Compound 7116/2012 945h Units Date Prepared ;alt Lake City, UT 84115 Tin mg/L Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 ~-mail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha. QA Officer This sample was not digested pursuant to the client request. Date Analyzed 712112012 1849h Contact: Jo Ann Tischler Method Used E200.8 DISSOLVED METALS Reporting Limit 0.00500 Analytical Result < 0.00500 Qual Report Date: 7/23/2012 Page 5 of 7 All analyses applicable to the CW A, SDW A, and RCRA are perfonned in accordance to NELAC protocols. Pertinent sampling infonnation is located on the attached COCo This report is provided for the exclusive 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. c?nnection with the adverti~ement, pro.motion or sale .of any product or process, orin connection with the re.-publication ofthis report for any INORGANIC ANALYTICAL REPORT American West ANALYTICAL I.ABORATORt ES 463 West 3600 South Client: Project: Lab Sample ID: Denison Mines Seeps and Springs 2012 1207214-003 Client Sample ID: Cottonwood Spring Collection Date: 6/20/2012 745h Received Date: Analytical Results Compound 7/16/2012 945h Units Date Prepared ;alt Lake City, UT 84115 Tin mg/L Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 ~-rnail: awal@awal-labs.com web: www.awal-labs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer This sample was not digested pursuant to the client request. Date Analyzed 7/2112012 U~53h Contact: Jo Ann Tischler Method Used E200.8 DISSOLVED METALS Reporting Limit 0.00500 Analytical Result < 0.00500 Qual Report Date: 7/23/2012 Page 6 of7 All analyses applicable to the CWA, SDWA, and RCRA are perfonned in accordance to NELAC protocols. Pertinent sampling infonnation is located on the attached COe. This report is provided for the exclusive use of the addressee. Privileges of subsequent use. of the name of this com~any or any member of its staff, or reproduction of this report in. c?nnection with the adverti~ement, pro.motion or sale of any product or process, or in connection with the re.-publication of t~is report for any 463 West 3600 South ;alt Lake City, UT 84115 Phone: (801) 263-8686 Toll Free: (888) 263-8686 Fax: (801) 263-8687 ~-mail: awal@awal-Iabs.com web: www.awal-Iabs.com Kyle F. Gross Laboratory Director Jose Rocha QA Officer INORGANIC ANALYTICAL REPORT Client: Denison Mines Project: Lab Sample ID: Seeps and Springs 2012 1207214-004 Client Sample ID: Back Spring Collection Date: 6/20/2012 745h Received Date: 7/16/2012 945h Analytical Results Compound Units Tin mglL Date Prepared This sample was not digested pursuant to the client request. Date Analyzed 712112012 1858h Contact: JoAnn Tischler DISSOLVED METALS Method Reporting Analytical Used Limit Result Qual E200.8 0.00500 < 0.00500 Report Date: 7/23/2012 Page 7 of 7 All analyses applicable to the CW A, SDWA, and RCRA are perfonned in accordance to NELAC protocols. Pertinent sampling infonnation is located on the attached COe. This report is provided for the exclusive use of the addressee. Privileges of subsequent useofthe name of this company or any member of its staff, or reproduction of this report in. c?nnection v:ith the advertisement, pro.motion or sakof any product or pro~ess, orin connection with the re.-publication of this report for any American West Analytical Laboratories WORK ORDER Summary Client: Client ID: Denison Mines DEN100 Contact: Jo Ann Tischler Project: Seeps and Springs 2012 QC Level: LEVEL III UL Denison Work Order: 1207214 Page 1 of 1 7/19/2012 WOType: Project Comments: PA Rush. QC 3 & Summary. EDD-EIM into Locus Database. Metals Split. Samples are were field filtered.; ~ Sample JD Client Sample ID 1207214-001A Enterance Seep SEL Analytes: SN 1207214-002A Ruin Spring SEL Analytes: S~ __________ _ 1207214-003A Cottonwood Spring SEL Analytes: SN 1207214-004A Back Spring SE!: Analytes: SN FOR LABORATORY USE ONLY [fill out on page 1]: %M [IJ" /' RT 0 Collected Date Received Date Date Due Matrix Test Code Sel Storage 6/20/20121015h 7/16/20120945h 7/26/2012 Aqueous-Dissolved 200.8-DIS ~ df -metals 6/20/20120920h 200.8-DTS ~ df -metals 6120120120745h 200.8-DTS ~ df -metaJ~------ 200.8-DTS ~ df-metals CN 0"" T AT ~/ QC [!1~ . HOK_~ HOK_~ HOK ___ _ ! 2 0 jlllj till Chain of Custody and Analytical Request Record PLEASE PRINT Provide as much information as r-C-o-m-p-an-y'7"':N-am-e-; -----~---------,-=-;P~ro~je=-=c';=;t N:7':a~m~e~, PWS. Permit, Etc. 'ii3'3fR D~n\'.sDn M\'ne~ Se ;2,.0\2. U'i Report Mail Address: Contact Name: Phone/Fax: Email: B )"I',}, ; 110. 'PO 1$\ B t>~ 4 J i'1. (n·.(" " ? "'\ M c ( '-\llS (" 7 t ;l:2;J.. \ Invoice Address: ::::oJ I Invoice Contact & Phone: S~~ D~~~~ ~rv.. L\~S G,18 ~! Purchase Order: Page --L-of ~ EPA/State Compliance: Yes b(J No 0 Sampler: (Please Print) ~l\~r ~oll:JA ~ Quote/Bottle Order: ~ Special Report/Formats: .1 Contact ELI prior to -SllIj:ij)ecll:ly: RUSH sample submittal f£;)/f)~ DDW o EDD/EDT(Electronic Data) o POTWNVWTP o State: ----o Other: ---- Format: ___ _ o LEVEL IV o NELAC a '-~Otl)~ ~ro;:g 012 ._> 0 >-co aCf)~ rn:::-C !:!!. tI» 0S:'O ro O'l U .-<I.lI.Q .S ~ ....... ,,-COI1§ 0'0(1) c;::.- R I for charges and scheduling -See Instruction Page U I Comments: ~ ... &~.QQ ~!t6 I (l) .... 1i)s: ~ . -. Cooler 10(s): G J\4n f Receipt Temp ~. ? °C On lee: 0 N L :i11«I~o ~ I WI" ;) ICus_SeaI I SAMPLE IDENTIFICATION I Collection I ColI~tion MATRIX <8 I I I , IM':t~h'u,,, ~ N I (Name, Location, Interval, etc.) Date TIme --+ . . .. -.------1 1 "C",t~MCe.. S-ee.p b/:;"O/r;)... )D\~ b~W 'i I~ ) ~~~ It:~ 1;1 t+tf~ I il--------l 5-r;.~O B}~1< bt~ I 'Iao/l~ 1 1 I I \ _ L II A I I ',;:I ~I / I ~ lB-- 1"9 l~ustOd-y~~~~~~~--~~~-------~--~~~~7~~~~.~~~~~ .. ~~~~~~~---,~--~~sl=gn~a~u~m-: ~~~~':::::::::-""~~~~~~.¥,~---;f---+~~~~~~:!:"~~~!LJ-I~~--,-q.....:.-....L' '{5 ~9L J3r LAlA~V'\~---I R eco rd Signature: ----- MUSTb~~~~~~~~~~~~--~ S i 9 ned Return to Client: Lab Disposal: ~'''==*'=-_ .... _________ ... ""'"' .... _____ .-.:~ In certain circumstances. samples submitted to Energy Laboratories, Inc. may be subcontracted to other certified laboratories in order to complete the analysis requested. This serves as notice of this possibility. All sub~contract data will be clearly notated on your analytical report. Visit our web site at wwW.energylab.com for additionallnformatiorl, downloadable fee schedule, forms. and links. Lab Set ID' \ 2012.\L\ Samples Were: COC Tape Was: Container Type: rn--shipped B y: 'Fe.c~r >f.. Present on Outer Package D A W AL Supplied Plastic D Band Delivered , DYes ffNo DN/A D A W AL Supplied Clear Glass / llVAmbient Unbroken on Outer package D A W AL Supplied Amber Glass / D Chilled DYes D No G1f/A Temperature 111 2~ °C / Present on$ample DYes ~o DN/A o A WAL Supplied VOA~=iaIS D Amber D Clear D Heads e DNo Headspace Rec. Broken/Leaking DYes ~o DN/A D Non A W AL Supplie~'Ontainer Notes: Properly Preserved Notes: Rec. Within Hold Notes: Bottle Type Ammonia COD Cyanide Metals N02 &N03 Nutrients O&G Phenols Sulfide TKN TOC TP04 TPH Procedure: 1) 2) 3) 4) 5) 6) 7) Unbroken on sa~le DYes DNo . N/A / ~Yes DNo DN/A Notes: / If Yes . DNo Preservative All pHs OK pH <2 H2SO4 pH <2 H2SO4 PH >12 NaOH pH <2HN03 pH <2 H2SO4 pH <2 H2SO4 pH <2HCL pH <2 H2SO4 pH> 9NaOH, ZnAC pH <2 H2SO4 pH <2 H3P04 pH <2 H2SO4 pH <2HCL /V / // /' .... V Pour a small amount of sample in the sample lid Pour sample from Lid gently over wide range pH paper Do Not dip the pH paper in the sample bottle or lid // /' // / / . Discrepancies Between Labels and COC Notes: I • ~ -,Il\ill V2- / I 1\ / / / / / / LV / 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 Place client conversation on eoe Samples may be adjusted at client request ~7n~l~ No%c. I , V DYes ~o TabE Quality Assurance and Data Validation Tables Table E-l Holding Time Evaluation Back Spring .Required Holding Time Entrance Westwater Cottonwood Ruin Spring (duplicate Of Seep Seep Seep Cottonwood Seep) Major Ions Carbonate 14 days OK OK OK OK Bicarbonate 14 days OK OK OK OK Calcium 6 months OK OK OK OK Chloride 28 days OK OK OK OK Fluoride 28 days OK OK OK OK Magnesium 6 months OK OK OK OK Nitrogen-Ammonia 28 days OK OK OK OK Nitrogen-Nitrate 28 days OK OK OK OK Potassium 6 months OK Not Sampled OK OK OK Sodium 6 months OK -Dry OK OK OK Sulfate 28 days OK OK OK OK pH (s.u.) N/A OK OK OK OK TDS 7 days OK OK OK OK 6 months (except mercury which is 28 Metals days) OK OK OK OK Radiologies 6 months OK OK OK OK VOCS (including THF) 14 days OK OK OK OK E-2 Laboratory Receipt Temperature Check Work Order' Number/Lab Set ill Receipt Temp EL -C12060931 2.2°C A WAL -1206379 (THF and Tin) 4.5°C AWAL -1207214 (Tin) N/A N/ A = These shipments contained samples for the analysis of tin only. Per Table 1 in all revisions of the approved QAPs that were in effect during this sampling period, (Revisions 6, 7.1 and 7.2),samples submitted for tin analyses do not have a sample temperature requirement. E-3: Analytical Method Check -Routine Samples Parameter QAP/Permit . Method Method Used by Lab Ammonia (as N) A4500-NH3 G or E350.1 A4500-NH3 G Nitrate + Nitrite (as N) E353.1 or E353.2 E353.2 Metals except Iron E 200.7 or E200.8 E200.8 Iron E 200.7 or E200.8 E200.7 Gross Alpha E900.0 or E900.1 E900.1 VOCs except Tetrahydrofuran SW8260B or SW8260C SW8260B Tetrahydrofuran SW8260B or SW8260C SW8260C Chloride ~4500-CI B, A4500-CI E, or E300.0 A4500-CI B Fluoride A4500-F C or E300.0 A4500-F C Sulfate A4500-S04 E or E300.0 A4500-S04 E TDS , A2540 C A2540 C Carbonate as C03, Bicarbonate as HC03 A2320 B A2320 B Calcium, Magnesium, Potassium, Sodium E200.7 E200.7 E-4 Reporting Limit Evaluation Parameter Ammonia (as N) Nitrate + Nitrite (as N) Metals uglL Arsenic Beryllium Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Molybdenum Nickel Selenium Silver Thallium Tin Uranium Vanadium Zinc Gross Alpha VOCs uglL Acetone Benzene Carbon tetrachloride Chloroform Chloromethane MEK Methylene Chloride Naphthalene T etrahydrofuran Toluene Xylenes Major Ions mglL Chloride Fluoride Sulfate TDS Carbonate as C03, Bicarbonate as RC03 Calcium, Magnesium, Potassium, Sodium All analyses were reported to the required RLs unless noted in the text. Permit-Specified 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 E-5: Trip Blank Evaluation All trip blanks for the 2012 sampling program were nondetect. ,. Blank Sample Date Laboratory 1 6/20/2012 AWAL 2 6/20/2012 EL E-6 Duplicate Sample Relative Percent Difference , Back Spring Major Ions (mg/l) Cottonwood Spring (Duplicate of RPD% Cottonwood Spring) Carbonate <1 <1 N/C Bicarbonate 326 326 0.0 Calcium 101 93.8 7.4 Chloride 149 121 20.7 Fluoride 0.38 0.38 0.0 Magnesium 27.7 25.5 8.3 Nitrogen-Ammonia <0.05 <0.05 N/C Nitrogen-Nitrate <0.1 <0.1 N/C Potassium 6.2 6.2 0.0 Sodium 247 223 10.2 Sulfate 356 366 2.8 pH (s.u.) 7.06 7.06 0.0 TDS 1040 1040 0.0 Metals, (ug/l) Arsenic <5 <5 N/C Beryllium <0.5 < 0.5 N/C Cadmium <0.5 <0.5 N/C Chromium <25 <25 N/C Cobalt <10 <10 N/C Copper <10 <10 N/C Iron <30 <30 N/C Lead <1.0 <1.0 N/C Manganese <10 <10 N/C Mercury <0.5 <0.5 N/C Molybdenum <10 <10 N/C Nickel <20 <20 N/C Selenium <5 <5 N/C Silver <10 <10 N/C Thallium <0.5 <0.5 N/C Tin <100 <100 N/C Uranium 8.17 8.56 4.7 Vanadium <15 <15 N/C Zinc <10 <10 N/C Radiologies (pC ill) Gross Alpha <-0.2 <0.07 N/C .'. VOCS (ug/L) Acetone ND ND N/C Benzene ND ND N/C Carbon tetrachloride ND ND N/C Chloroform ND ND N/C E-6 Duplicate Sample Relative Percent Difference Back Spring Major Ions (mg/l) Cottonwood Spring (Duplicate of RPD% Cottonwood Spring) Chloromethane ND ND N/C MEK ND ND N/C Methylene Chloride ND ND N/C Naphthalene ND ND N/C Tetrahydrofuran ND ND N/C Toluene ND ND N/C Xylenes ND ND N/C E-7 Radiologies Counting Error Gross Alpha Sample,ID minus Rn & U Entrance Seep 0.5 Westwater Seep NS , Cottonwood Seep <-0.2 Ruin Spring <-0.09 Ii. Back Spring , (duplicate of Cottonwood Seep) <0.07 NS -Westwater Seep was dry and not sampled 2012 'Gross Alpha " COl!nting, rri,inus Rn &U Error ~ Precision (±) 20% 0.4 NA NS NA 0.2 NA 0.3 NA 0.3 NA , Within 'GWQS GWQS 15 NA 15 NA 15 NA 15 NA 15 NA E-8: Laboratory Matrix QC Matrix Spike % Recovery Comparison MSD REC Lab Report Well . Analyte MS %REC %REC Range RPD Cottonwood C12060931 Spring Benzene 144 95 70-130 41 Cottonwood C12060931 Spring Chloromethane 74 94 70-130 23 Cottonwood C12060931 Spring Toluene 146 108 70-130 30 C12060931 N/A Carbon Tetrachloride 96 48 70-130 66 C12060931 N/A Chloromethane 130 145 70-130 10 C12060931 N/A Toluene 109 232 70-130 66 NA = MS samples were not Denison samples. Surrogate % Recovery Lab QAP Surrogate Specified Required Lab Report Well/Sample Analyte %REC REC Range Range C12060931 Entrance Spring 1,2-Dichlorobenzene 126 80 -120 None C12060931 Entrance Spring p-Bromofluorobenzene 146 80 -120 None C12060931 Ruin Spring 1,2-Dichlorobenzene 122 80 -120 None C12060931 Ruin Spring p-Bromofluorobenzene 140 80 -120 None C12060931 Cottonwood Spring 1,2-Dichlorobenzene 122 80 -120 None C12060931 Cottonwood Spring p-Bromofluorobenzene 138 80 -120 1 None C12060931 Back Spring p-Bromofluorobenzene 133 80 -120 None C12060931 Trip Blank 1,2-Dichlorobenzene 121 80 -120 None C12060931 Trip Blank p-Bromofluorobenzene 138 80 -120 None C12060931 Method Blank 1,2-Dichlorobenzene 121 80 -120 None C12060931 Method Blank p-Bromofluorobenzene 136 80 -120 None Cottonwood Spring C12060931 (Matrix Spike) Toluene-d8 171 80 -120 None Cottonwood Spring (Matrix Spike C12060931 Duplicate) Toluene-d8 123 80 -120 None C12060931 Method Blank 1,2-Dichlorobenzene 121 80 -120 None C12060931 Method Blank p-Bromofluorobenzene 132 80 -120 None N/A (Matrix Spike C12060931 Duplicate) Toluene-d8 233 80 -120 None NA = MS samples were not Denison samples. Method/Laboratory Reagent Blank detections Reported Lab Report Well/Sa·mple . Analyte Concentration C12060931 MB Bicarbonate 1.62 mglL Kathy Weinel From: Sent: To: Cc: Subject: Attachments: Mr. Lundberg, Kathy Weinel Wednesday, November 21 , 2012 8:52 AM 'rlundberg @ utah.gov' Dean Henderson; 'Phillip Goble'; Harold Roberts; David Frydenlund; Jo Ann Tischler; Jaime Massey; David Turk; N. Tanner Holliday; Garrin Palmer Transmittal of CSV Files White Mesa Mill 2012 Seeps and Springs Monitoring C12060931.csv; 1207214-EDD.csv; 1206379-EDD.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 2012, 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 1 TabG DRC Correspondence Regarding Annual Seeps and Springs Reports and Data Use This attachment has been intentionally left blank. 2