Loading...
HomeMy WebLinkAboutDRC-2013-003620 - 0901a068803e03131*4 5P$ .(8 9* State of Utah GARY R HERBERT Governor GREG BELL Lieutenant Governor Department of Environmental Quality Amanda Smith Executive Director DIVISION OF RADIATION CONTROL Rusty Lundberg Director DRC-2013-003620 MEMORANDUM TO: THROUGH: FROM: DATE: SUBJECT: File Phil Goble, Compliance Section Manager Tom Rushing, P.G. December 9,2013 Review of the 3rd Quarter, 2013 (dated November 20, 2013) Groundwater Monitoring Report, Groundwater Discharge Permit UGW370004 - Energy Fuels Resources (USA) Inc., White Mesa Uranium Mill, Blanding, Utah This is a summary of Division of Radiation Control ("DRC") staff review of the Energy Fuels Resources (USA) Inc. ("EFR") groundwater momtonng report for the 3rd Quarter 2013 (July-September), dated November 20, 2013 (received by DRC on November 21, 2013). The review included all sampling events and accelerated momtonng dunng the quarter. The review was conducted to ensure compliance with all applicable parts of Utah Groundwater Discharge Permit No. UGW370004 ("Permit") issued for the White Mesa Uranium Mill located m Blanding, Utah. DRC staff additionally reviewed the EFR November 15, 2013 document titled "State of Utah Ground Water Discharge Permit No. UGW370004 White Mesa Uranium Mill - Notice Pursuant to Part I.G. 1(a)." This document provides a detailed explanation of ground water compliance issues dunng the third quarter White Mesa Mill sampling and analysis. c 1. Checklist of Significant Findings and Associated Actions at the White Mesa Uranium Mill 1. The subject Monitoring Report was received by the due date per the Permit Part I.F. 1 (due date December 1,2013). 2. A May 25, 2012 EFR Permit modification request was made in order to document accelerated reporting and momtonng agreements made^dunng a teleconference with the Utah Division of Radiation Control (DRC). Per DRC staff discussions: The May 25, 2012 request will be included with the White Mesa Mill Ground Water Permit Renewal. DRC review of the 1st Quarter 2013 Report recognized the telephone agreements regarding timelines for EFR to submit compliance notices. The modification request is currently being addressed in a Permit modification. 3. An EFR October 10, 2012 Source Assessment Report, EFR April 13, 2012 pH Report, and EFR December 12, 2012 Pyrite Investigation Report for previously documented out- of-comphance parameters (multiple parameters), required per Stipulated Consent Agreement, Docket No. UGW 12-03. Per DRC review findings as documented m a DRC review memo dated Apnl 23, 2013 and transmitted via letter to EFR dated Apnl 25, EFR 3r Quarter Groundwater Monitoring Report DRC Review Memo Page 2 of 14 2013, it is recommended that specific GWCL parameters for momtonng wells be modified (12 instances), GWCL's for pH be modified for all momtonng wells, and that GWCL's be removed from the permit for 3 up-gradient monitoring wells. These requests are currently being addressed through the permit modification process. 4. Laboratory QA/QC flags were documented on the review period analytical data reports from the contract laboratones. Per DRC review (Section 8 Below) it appears that all discrepancies were self-reported by EFR and that none of the discrepancies are violations of the Permit or the QAP. 5. Three new monitonng wells went into accelerated monitoring frequency dunng the momtonng period. MW-11 was accelerated from quarterly to monthly based on a single exceedance of GWCL's (Apnl 16, 2013 sample). Monitoring well MW-31 went into accelerated monitonng for pH based on an Apnl 16,2013 exceedance. Monitoring well MW-27 went into accelerated monitonng for sulfate based on a May 21, 2013 exceedance. Accelerated monthly monitoring will commence in September 2013 for these wells. Based on the Report and review of the period monitonng data no new wells went into out of compliance status. 2. Accelerated Monitoring and POC Wells Exceeding GWCL's When a monitoring well has a pollutant that exceeds a Ground Water Compliance Limit (GWCL) set forth in Table 2 of the Permit, it is in Probable Out-of-Compliance (POOC) status. According to the Permit, EFR is then required to immediately initiate accelerated sampling of that pollutant (see the Permit, Part I.G. 1). When monitonng wells have parameters that have exceeded the Ground Water Compliance Limit (GWCL) two or more consecutive times they are in Out of Compliance (OOC) status (see the Permit, Part I.G.2). In the event a constituent is in OOC status, EFR is required to prepare and submit within 30 calendar days to the Director a plan and a time schedule for assessment of the sources, extent and potential dispersion of the contamination, and an evaluation of potential remedial action to restore and maintain groundwater quality to insure that Permit limits will not be exceeded at the compliance monitoring point and that DMT or BAT will be re-established, in accordance with Part I.G.4(c) of the Permit. Accelerated Monitoring Requirement Exception: Based on review of 1st Qtr., 2nd Qtr., and 3rd Qtr. 2011 Groundwater Monitoring Reports, DRC issued a February 7, 2012 Notice of Enforcement Discretion (NOED) for failure on the part of EFR to comply with these timelines for acceleration of groundwater monitonng at well MW-35. EFR stated in a March 26,2012 response to the NOED that based on an agreement made between DRC and EFR during a telephone conference call on April 5, 2010, EFR is not required to implement accelerated monitoring until "the month following the submission of the Exceedance Notice for a specified quarter" Based on DRC review of notes taken during the Apnl 5, 2010 telephone conference (Loren Morton 4/5/10), EFR verbally requested to wait until the end of the quarter to send in the notice of out-of compliance status - but within 30 days of the last lab report that EFR receives for the quarterly monitoring event. DRC notified EFR by letter (dated Apnl 16,2012) that m order to formalize the Apnl 5,2010 discussion items related to out-of-compliance reporting and sampling, a written request for a groundwater permit EFR 3rd Quarter Groundwater Monitoring Report DRC Review Memo Page 3 of 14 modification (groundwater permit, out-of-compliance notification and accelerated monitoring requirements) is required for Director review and approval. EFR submitted a May 25, 2012 written request for a Permit modification, including redline copies of pertinent pages of the Permit to reflect the agreements made dunng the April 5, 2010 conference call. The Permit modification request is currently under DRC review and is pending Permit modification. In the interim, DRC is honoring the teleconference agreements and is not pursuing Permit enforcement based on EFR failure to meet the current time and schedule submission requirements as stated in the Permit. Current Accelerated Monitoring Status: The table below (Table 1) lists monitoring wells with parameters currently in OOC or POOC status and therefore required to be sampled under the accelerated monitonng requirements: Table 1 - Wells Monitored Quarterly Accelerated to Monthly Monitoring Well Class *Position Parameter Date of First Exceedance of GWCL Date Accelerated Monitoring First Required MW-11 Class II water D-3 Manganese Field pH February 2010 Apnl 2013 May 2010 September 2013 MW-14 Class HI water D-4A Field pH Manganese February 2010 2nd Quarter 2012 May 2010 August 2012 MW-25 Class III water C-3 Field pH Fluonde Uranium Cadmium Chloride 4W Quarter 2010 3rd Quarter 2013 3rd Quarter 2010 4th Quarter 2012 1st Quarter 2013 January 2011 December 2013 January 2011 March 2013 June 2013 MW-26(a) Class m water C-2 Field pH Nitrate + Nitrite (as N) Chloroform Uranium Chlonde Dichloromethane February 2010 February 2010 February 2010 February 2010 February 2010 Apnl 2010 May 2010 May 2010 May 2010 May 2010 May 2010 June 2010 MW-30 Class II water D-2 Nitrate + Nitrite (as N) Chlonde Selenium Uranium February 2010 1st Quarter 2011 April 2010 4th Quarter 2011 May 2010 May 2011 July 2010 March 2012 MW-31 Class IQ water D-2 Nitrate + Nitrite (as N) Chlonde Sulfate TDS Selenium Field pH February 2010 1st Quarter 2011 4th Quarter 2010 September 2010 3rd Quarter 2012 April 2013 May 2010 May 2011 March 2011 January 2011 December 2012 September 2013 MW-35 Class II C-4B Uranium Manganese Thallium Adjusted Gross Alpha 2nd Quarter 2011 2nd Quarter 2011 3rd Quarter 2011 3rd Quarter 2011 July 2011 July 2011 July 2011 October 2011 EFR 3rd Quarter Groundwater Monitoring Report DRC Review Memo Page 4 of 14 Selenium Molybdenum y3 Quarter 2012 4th Quarter 2012 December 2012 March 2013 D - Down-gradient; U = Up-gradient; C — Cross-gradient; 1,2,3,4A = Cell # a = Monitoring well MW-26 is a pumping well for the Chloroform investigation Wells Monitored Semi-annually Accelerated to Quarterly Monitoring Well Class *Position Parameter Date of First Exceedance of GWCL Date Accelerated Monitonng First Required MW-1 Class II water U-l Tetrahydrofuran Sulfate Manganese 4th Quarter 2012 4th Quarter 2012 4th Quarter 2012 1st Quarter 2013 1st Quarter 2013 1st Quarter 2013 MW-3 Class ELT water D-4A Selenium Field pH Fluonde T* Quarter 2010 3"7a_Quarter2010 3rd Quarter 2010 3rd Quarter 2010 2nd Quarter 2010 2nd Quarter 2010 MW-3A Class ITJ water D-4A Field pH Sulfate TDS Selenium Nitrate + Nitrate (as N) 2"^Quarter2010 2nd Quarter 2010 2nd Quarter 2010 4th Quarter 2010 4th Quarter 2012 3ra Quarter 2010 3rd Quarter 2010 3rd Quarter 2010 1st Quarter 2011 1st Quarter 2013 MW-5 Class II water D-3 Uranium 4s Quarter 2010 1st Quarter 2011 MW-12 Class in water D-3 Field pH Selenium 4th Quarter 2010 2nd Quarter 2010 1st Quarter 2011 3rd Quarter 2010 MW-15 Class ITJ water D-4A Iron Selenium 4"arQuarter 2011 2nd Quarter 2012 1st Quarter 2012 3rd Quarter 2012 MW-18 Class IH water U-l Thallium Field pH Sulfate TDS "^Quarter 2010 2nd Quarter 2010 2nd Quarter 2010 2nd Quarter 2010 3ra Quarter 2010 3rd Quarter 2010 3rd Quarter 2010 3rd Quarter 2010 313" Quarter 2010 1st Quarter 2012 1st Quarter 2013 MW-19 Class m water U-l Field pH Nitrate + Nitnte as N Adjusted Gross Alpha f* Quarter 2010 4th Quarter 2011 4th Quarter 2012 ^Quarter 2010 1st Quarter 2012 MW-23 Class IH water D-3 Field pH Manganese 2"^ Quarter 2010 4th Quarter 2011 3ld_Quarter2010 3rd Quarter 2010 MW-24 Class m water D-l Cadmium Thallium Field pH Fluonde 2lidQuarter2010 2nd Quarter 2010 2nd Quarter 2010 4th Quarter 2012 3rd Quarter 2010 1st Quarter 2013 3"H"Quarter2010 1st Quarter 2011 3rd Quarter 2010 2nd Quarter 2010 4th Quarter 2011 MW-27 Class IU water U-l Nitrate + Nitnte (as N) Adjusted Gross Alpha TDS Chlonde Field pH "^Quarter 2010 4th Quarter 2010 1st Quarter 2010 1st Quarter 2010 3rd Quarter 2011 MW-28 Class UI water D-l Field pH Chloride Manganese T5 Quarter 2010 2nd Quarter 2010 2nd Quarter 2012 3ra Quarter 2010 3rd Quarter 2010 3rd Quarter 2012 MW-29 Class III water D-2 Field pH Iron 4m Quarter 2010 3rd Quarter 2011 i^Quarter 2011 4th Quarter 2011 EFR 3rd Quarter Groundwater Monitoring Report DRC Review Memo Page 5 of 14 3^ Quarter 2012 Manganese TDS 2T Quarter 2012 2nd Quarter 2012 3rd Quarter 2012 MW-32 Class III water C-2 Adjusted Gross Alpha Field pH T* Quarter 2010 2nd Quarter 2010 3ra Quarter 2010 3rd Quarter 2010 * D = Down-gradient; U = Up-gradient; C = Cross-gradient; 1, 2, 3, 4A = Cell # Table 1 above is a comprehensive list of all Groundwater Monitonng Wells in Accelerated Status. EFR is required to notify the DRC on a quarterly basis regarding wells and parameters which went into accelerated monitoring dunng the period [Part I.G. 1(a), Accelerated Monitoring Status Reports (AMSR)]. For the 3rd quarter 2013 monitoring, the AMSR and follow up Plan and Time Schedule [Required by the Permit Part I.G.4(d)] was received, dated November 15, 2013 (received by DRC on November 18, 2013). One well/parameter with a new (single) exceedance was noted per review of the AMSR; MW-25 was accelerated from quarterly to monthly based on a 3rd Quarter 2013 exceedance of the Fluoride GWCL. Based on review of the AMSR there were no new exceedances for the semi-annual well sampling program. 3. Monitoring Wells Purged for Two Casing Volumes Before Sample Collection As stated in Section 6.2.7 of the EFR Quality Assurance Plan (QAP), Rev. 7.2, EFR has a choice regarding purge volumes as follows: "7. Purging three well casing volumes with a single measurement offield parameters 2. Purging two casing volumes with stable field parameters (within 10% RPD) 3. Purging a well to dryness and stability of a limited list offield parameters after recovery''' Per DRC review of the Report, the following purge methods were used for each Quarter (including accelerated samples): Quarter # Purged 2 Casing Volumes | # Purged to Dryness | # Purged 3 Casing Volumes 3rd Qtr. 2013 37 1 1-contmuous pumping well When purging two casing volumes EFR QAP Rev. 7.2 directs EFR to first calculate the amount of time to evacuate two casing volumes and then pump for that length of time. Per DRC cross check of the field data sheets for each of the reports reviewed, it appears EFR correctly calculated the well casing volumes and evacuated the required two casing volumes (when 2 casing volume method selected) in monitonng wells prior to sample collection dunng the 3rd Quarter 2013 monitoring penod. During past DRC onsite sampling inspections it was noted that EFR sample collectors additionally use a graduated carboy and cross check purged values to insure that the required amount of groundwater was evacuated. In cases where wells are evacuated to dryness the QAP Rev. 7.2, applicable requires that: "(vii) If the well is purged to dryness: Record the number of gallons purged on the Field Data Worksheet. EFR 3r Quarter Groundwater Monitoring Report DRC Review Memo Page 6 of 14 The well should be sampled as soon as a sufficient volume of groundwater is available to fill sample containers. Upon arrival at the well after recovery or when sufficient water is available for sampling measure depth to water and record on the Field Data Worksheet. Take one set of measurements offield parameters for pH, specific conductance and temperature only. Collect the samples into the appropriate sample containers. Take an additional set of measurements offield parameters for pH, specific conductance and temperature after the samples have been collected. If the field parameters ofpH, specific conductance and temperature are within 10% RPD the samples can be shipped for analysis. If the field parameters ofpH, specific conductance and temperature are not within 10% RPD, dispose of the sample aliquots, and purge the well again as described above. Repeat this process if necessary for three complete purging events. If after the third purging the event, the parameters of pH, specific conductance and temperature do not stabilize to within 10% RPD, the well is considered sufficiently purged and collected samples can be submitted for analysis." DRC staff verified that in cases where the monitoring well was evacuated to dryness, the number of gallons evacuated was recorded in compliance with the QAP. Also, DRC staff verified that depth to groundwater was measured and recorded (comments field) on the field sheet. 4. Relative Percentage Difference Calculations for Blind Duplicate Analysis DRC conducted a review of the blind duplicate samples collected during the 3rd Quarter 2013. Per the facility QAP, one blind duplicate must be collected with each sample batch. DRC confirmed that one blind duplicate was collected for each batch (2 total during the quarterly event - one with the baseline samples and one with the accelerated samples). The duplicates are required to be within 20% Relative Percent Difference (RPD), unless "the measured concentrations are less than 5 times the required detection limit (Standard Methods, 1998)" Per updated language in the QAP Rev. 7.2 Part 9.1.4, if any of the samples do not meet the comparison criteria (and are not qualified according to the 5 times method detection limit criteria) then EFR is required to conform to the procedures for corrective action listed as follows: 1. Notify the laboratory, 2. Request the laboratory review all analytical results for transcription and calculation errors, and, 3. If the samples are still within holding time, the QA Manager may request the laboratory re- analyze the affected samples. Per DRC cross check of the blind duplicate samples collected and analyzed dunng the 3rd Qtr. 2013 (4 samples, 8 parameters), all sample results conform to the Permit requirements (within 20% RPD). EFR 3rd Quarter Groundwater Monitoring Report DRC Review Memo Page 7 of 14 rs It was noted that the blind duplicate samples which were collected were for a limited number of parameters. As such, only 8 total parameters were split in the 4 blind duplicate samples. Although the facility QAP does not specifically require that split samples include well locations where a full suite of samples will be analyzed, this is the intention of the split sample collection and comparison. DRC will include an advisory to EFR that future split samples should be collected at wells where a complete suite of analyses will be performed. 5. Analytical Laboratories Used bv EFR Certified bv State of Utah to Perform Analysis for all Analytes The analytical laboratories (GEL Laboratories LLC, Charleston, SC and American West Analytical Laboratories, Salt Lake City, UT) were contracted by EFR to perform analysis on the samples collected dunng the 3rd Quarter, 2013. Per DRC review of the National Environmental Laboratory Accreditation Management System Website (cross check of laboratory certification for specific parameters) it appears that the EFR contract laboratones were certified to perform analysis for the specified parameters during the review period as follows. American West Analytical Laboratories - Salt Lake City, UT Certification Active Per the website information: Basic Details Name American West Analytical Laboratories Type of Lab Commercial TNI Lab Code TNI01955 EPA Code UT00031 State ID 8012638686 Website Extended Details PnmaryAB responsible TT. . , uu r T , , , Utah Department of Health ior lab demographics K GIS Location Description Comments Effective Date Commercial Samples Yes Active Yes Address 1 Type Location Company Contact Kyle Gross Address 1 463 West 3600 South Address 2 EFR 3rd Quarter Groundwater Monitoring Report DRC Review Memo Page 8 of 14 City Salt Lake City State Utah Zip 84115- Country US Phone 8012638686 Fax 8012638687 Email kyle@awal-labs.com GEL South Carolina ~ Utah Certification is currently active. Basic Details Name GEL Laboratories, LLC Type of Lab Commercial TNI Lab Code TNI00188 EPA Code - SC00012 State ID E87156 Website Extended Details f^lab^enwg^^^ Florida Department of Health Environmental Laboratory Certification Program GIS Location Description Comments Effective Date Commercial Samples Yes Active Yes Address 1 Type Location Company Contact JAMES B. WESTMORELAND Address 1 2040 Savage Rd Address 2 City Charleston State South Carolina Zip 29407 Country US Phone 8435568171 Fax 8437661178 EFR 3r Quarter Groundwater Monitoring Report DRC Review Memo Page 9 of 14 Email ibw@gel.com 6. Laboratory Report Turn Around Times Per DRC review of EFR Table 1 included in the 3rd Qtr. 2013 Report, it was noted that laboratory report turnaround times (from date of EFR sample submission to the contract laboratory) was generally m the range of lmonth (12 to 48 days). There is not a turnaround time requirement in the current QAP; therefore, current turnaround times are judgment based. DRC has raised concern over excessive laboratory turn-around times in the past and the Director may require a turn-around date be included in the facility QAP if any future concerns regarding analysis turnaround times are noted. Based on DRC review the turn-around times for the 3rd Quarter 2013 data appear to be reasonable/appropriate. 7. Sample Holding Times Per Table 2 A and Table 2B of the Report, all holding times were met for each analyte submitted for laboratory analysis. DRC staff cross checked all holding time requirements and venfied that all samples/analytes appeared to have been submitted within holding times dunng the 3rd Qtr. 2013 reporting penod. 8. Laboratory QA/QC Flags - 3rd Quarter 2013 QA/QC issues and DRC findings for the 3rd Quarter 2013 are summarized below: Non-Conformance Summary Self- Identified? EFR Corrective Action Summary^: ' DRC Bindings Laboratory reporting limits were raised for vanous samples for analysis of S04, TDS, Cl, Ca, K, Na, Mg, Nitrate/Nitnte (N), Chloroform, TDS and Fe EFR states that the raised RL's are due to sample dilution and qualifies the data in Table G based on all sample results being above the raised RL The EFR QAP allows for raised RL's if due to need for dilution MW-11, MW-14, MW-19, MW-25, MW-26, MW-27, MW-30, MW-31, MW-32, MW-35, MW-36, MW-37 Gross Alpha Counting Error was not <20% of the sample analysis result (sample activity) The sample result + the counting errors were less than the GWCL in all cases and are therefore acceptable. Per the QAP Part 9.1.4(b) "An error term may be greater than 20% of the reported activity concentration when the sum of the activity concentration and error term is less than or equal to the GWCL" Matrix Spike % recovery outside of range MW-14 Sodium, Calcium, MW-26 Nitrate/Nitrite (N), MW-19 Nitrate/Nitnte (N), MW-12 Nitrate/Nitnte (N), MW-01 Sodium, Calcium, MW-37 Ammonia None Per the QAP Part 8.1.2(a) matnx spikes are required but no requirements which would disqualify the laboratory data EFR 3rd Quarter Groundwater Monitoring Report DRC Review Memo Page 10 of 14 Method blank detection outside of limits for Toluene lab report no. 1307232 Y The Toluene sample Results were not affected by the method blank detection because there were no positive detections for toluene in any of the samples m the analytical batch. Facility QAP requires that the Method blank (check samples) be used to assess the quality of the data. DRC staff noted that none of the laboratory results for toluene were above the 1.0 mg/L required RL. DRC accepts the EFR corrective action since a detection in the method blank should correspond to greater detection in the samples due to contamination during the run. Matrix spike recovery outside of required range for chloroform and Nitrate/Nitrite (N) in monitoring well MW-26 The recoveries and RPD's above the acceptance limits do not affect the quality or usability of the data because the recoveries and RPD's above the acceptance limits are indicative of matrix interference most likely caused by other constituents m the samples. Per the facility QAP, the duplicate spike (matrix spike) sample serves as a check evaluating the effect of the sample matrix on the accuracy of analysis. The QAP requires that the matrix spike samples be run according to state certified laboratory procedures but does not specify enforcement requirements for samples outside of the acceptance cnteria. DRC notes that the laboratory reported the data with a listed qualifier. Note: DRC reviewed the holding time summary chart; no exceedances of holding times were noted DRC reviewed the temperature check charts, all sample batches were received by the laboratory <6°C 9. Review of Time-Concentration Plots The Permit Part I.F. 1 .g requires EFR to submit Time-Concentration Plots for each monitoring well for primary indicators of cell leakage (based on tailings cell concentrations and ground water partitioning and retardation coefficients); chlonde, fluonde, sulfate and uranium. DRC notes that per the discussions with EFR it was agreed to that EFR need not plot trend lines on the Time Concentration Plots and that all data is included on the plots (no data culled from the set). Per DRC review of the 3rd Qtr. 2013 Report, the plots no longer include trend lines. The reviewed plots appear to be in conformance with the agreed upon changes, no issues were identified. DRC additionally notes that any depicted increasing data trends m the indicator parameters were investigated in preparation of the October 10, 2012 EFR Source Assessment Report. EFR 3rd Quarter Groundwater Monitoring Report DRC Review Memo Page 11 of 14 10. Review of Depth to Groundwater Measurements and Water Table Contour Maps Per DRC cross checks of groundwater elevation measurement calculations used for the 3rd Quarter 2013, approximately 5% of wells cross checked, comparing water level measured elevations minus measured static levels with plotted elevations, no errors were noted. The upper wildlife pond at the White Mesa Mill was taken offline (pond recharge from Recapture Reservoir discontinued) dunng the 4th Quarter 2011. Static water level measurement, for several ground water monitonng wells in the vicinity of the upper wildlife pond are included on the table below. It was noted that the static water levels in several monitoring wells close to the upper wildlife ponds showed significant decrease in water levels during the 2nd Quarter 2013. Per the 3rd Quarter 2013 the water elevations showed additional significant decline in several wells (Piez-3, TWN-04, TW4-18, TW4-25), indicating that the water levels are continuing to re-establish to pre-pond levels. Static Water Level in Wells in the vicinity of the White Mesa Mill Upper Wildlife Pond Well Nof>* :. >a.-?-v:;>-.. .Y* - 'Static Level 1st Quarter 2012 Quarter 2012a 3^T~ Quarter 2012 4"l"Quarter^ »^012 , ffl|iliQuarteri 2013 ^Quarter 2013 3rd Quarter * Piez 1 61.59 61.52 62.08 61.55 62.33 62.87 62.61 Piez2 21.20 21.28 27.04 20.20 30.12 31.60 32.43 Piez 3 40.25 40.29 41.47 40.31 43.80 44.30 46.90 MW-19 52.14 52.08 54.19 55.01 55. 56.84 57.25 MW-27 51.04 51.00 51.46 51.46 51.80 52.39 52.38 TWN-02 21.00 21.02 23.66 20.93 28.41 32.37 32.31 TWN-03 32.80 32.83 34.00 32.76 35.90 37.32 37.14 TWN-04 41.05 41.03 43.40 41.01 46.30 47.75 48.54 TWN-06 74.60 74.62 75.17 75.27 75.49 75.93 75.95 TWN-07 88.34 88.39 87.86 87.76 87.25 87.05 86.85 TWN-08 61.63 61.64 62.20 62.30 62.53 63.01 Abandoned TWN-09 TWN-18 TW4-05 TW4-18 TW4-25 62.89 58.40 56.65 47.50 62.90 58.40 56.61 47.50 62.60 57.95 57.30 49.31 62.21 57.95 56.63 47.50 62.10 58.13 58.13 47.48 62.05 58.50 58.65 56.65 57.30 Abandoned 58.43 59.35 58.43 59.00 11. Conclusions and Recommendations Based on DRC staff review of the above listed documents it is recommended that a correspondence letter be sent to EFR with the following items: 1. DRC will include an advisory to EFR that future split samples should be collected at wells where a complete suite of analyses will be performed. 2. Close out regarding DRC review of the 3rd Qtr. 2013 White Mesa Uranium Mill Groundwater Monitoring Report EFR 3rd Quarter Groundwater Monitoring Report DRC Review Memo Page 12 of 14 12. References 1 Energy Fuels Resources (USA) Inc., November 20,2013, 3rd Quarter2013 Groundwater Monitoring Report Groundwater Discharge Permit UGW370004, White Mesa Uranium Mill 2 Energy Fuels Resources (USA) Inc., May 10, 2013, Notice Pursuant to Part LG.4(d) Ql, 2013 3 Energy Fuels Resources (USA) Inc., November 15, 2013, State of Utah Ground Water Discharge Permit No. UGW3 70004 White Mesa Uranium Mill - Notice Pursuant to Part I. G. 1(a) 4 Energy Fuels Resources (USA) Inc., June 6, 2012, White Mesa Uranium Mill Ground Water Monitoring Quality Assurance Plan (QAP), Revision 7.2. 5INTERA Incorporated, 2007. Revised Background Groundwater Quality Report: Existing Wells forDension Mines (USA) Corp. 's White Mesa Uranium Mill Site, San Juan County, Utah. 6 Hurst, T.G., and Solomon, D.K., 2008. Summary of Work Completed, Data Results, Interpretations and Recommendations for the July 2007 Sampling Event at the Denison Mines, USA, White Mesa Uranium Mill located near Blanding Utah. Prepared by University of Utah Department of Geology and Geophysics. 7 Utah Department of Environmental Quality, August 24,2012, Utah Ground Water Discharge Permit, Permit No. UGW370004 issued for the Energy Fuels Resources (USA) Inc. White Mesa Uranium Mill Attachment - Energy Fuels ReSOWCeSB,'ndD"P'-teComparisons laife:^'-^-'! White Mesa Uranium Mill feate o^afel&^''iliW^-i'3-Dec-13 ;;:iFacil_it7:.Na||e:; Well Nurnber:'-. . MW-29 (Blind Duplicate MW-65 .Parameter' • Sample. Date l|MW^i|r;SarT§e' Rpufli^ Per^t^f.v'" jm&jL- -,; • MW-65 ' Iron 7/17/2013 1.4 1.43 -2.1 Manganese 7/17/2013 5.14 5.04 2.0 Total Dissolved Solids 7/17/2013 4270 4420 -3.5 7/18/2013 <0.05 ron <0.0300 7/18/2013 Selenium 0.108 7.7 0.1 p;bat£ofbS 3-Jun-13 ••;.:i^$g:;^\\''W^^o?E?Hf^- •• —• ?- Facility Name: • : •" -• White Mesa Uranium Mill 1^41 "\ Blind Duplicate Analysis Relative Percent gf$$£ llgResu|ii|/L^ -r: Difference (RPD) 8/26/2013 0.164 -3.7 Manganese 0.158 aSSaSlwi Cadmium 9/20/2013 -3.0 0.00135 0.00131 9/20/2013 0.00607 -1.3 Uranium 0.00599