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HomeMy WebLinkAboutDRC-2014-001623 - 0901a06880403ec8ENERGY FUELS Energy Fuels Resources (USA) Inc. 225 Union Blvd. Suite 600 Lakewood, CO, US, 80228 303 974 2140 www.energvfuels.com Rusty Lundberg, Director, Division of Radiation Control Utah Department of Environmental Quality 195 North 1950 West P.O. Box 144850 Salt Lake City, UT 84114-4850 February 10, 2014 VIA PDF AND OVERNIGHT DELIVERY DRC-2014-001623 Re: State of Utah Ground Water Discharge Permit No. UGW370004 White Mesa Uranium Mill - Notice Pursuant to Part I.G.I (a) Dear Mr. Lundberg: The White Mesa Mill (the "Mill") performed fourth quarter ("Q4") groundwater monitoring during the period from October 1, to December 31, 2013 under the August 24, 2012 version of the Mill's Groundwater Discharge Permit (the "GWDP"). All analytical data needed for comparison to the GWCLs were received during the period ending January 15, 2014. Pursuant to Part I.G.I.a) of the GWDP, (August 24, 2012) please take notice that the concentrations of specific constituents in the monitoring wells highlighted in yellow and bold italics in the columns for this quarter in the attached Table 1 exceeded their respective GWCLs. For ease of review, Table 1 has been formatted to simplify the tracking of any continued exceedances from one monitoring period to the next by charting ongoing monitoring of the same well in the same row, and by highlighting exceedances (in color and bold italics). Part I.G.I c) of the GWDP states "that the Permittee shall prepare and submit within 30 calendar days to the Executive Secretary a plan and a time schedule for assessment of the sources, extent and potential dispersion of the contamination, and an evaluation of potential remedial action to restore and maintain groundwater quality to ensure that Permit limits will not be exceeded at the compliance monitoring point and that DMT or BAT will be reestablished." The summary below relating to Q4 2013 exceedances includes, for each exceedance, a brief discussion of whether such a plan and schedule is or is not required or appropriate at this time in light of other actions currently being undertaken by Energy Fuels Resources (USA) Inc. ("EFRI") or in light of other reports submitted by EFRI, and as determined by Division of Radiation Control ("DRC") Staff. A description of the other actions and reports which have affected the requirement to submit a plan and time schedule are as follows: 1. Nitrate + nitrite and chloride in monitoring wells at the site have been the subject of ongoing investigations at the Mill. Based on the results of the previous investigations, EFRI and the Director acknowledge that it has not been possible to date to determine the source(s), cause(s), attribution, magnitudes of contribution, and proportion(s) of the local nitrate + nitrite and chloride in groundwater. EFRI submitted a Corrective Action Plan ("CAP") in February 2012 for nitrate + nitrite and chloride in groundwater. The CAP was approved on December 12, 2012 and the activities associated with the CAP are on-going. Based on information provided by DRC in Letter to Mr. Rusty Lundberg February 10, 2014 Page 2 teleconferences on April 27, and May 2, 2011, due to the ongoing activities and actions, the 30- day plan and schedule for assessment is not required for nitrate + nitrite and chloride exceedances at this time. 2. As discussed in previous quarterly groundwater sampling reports, the background levels and GWCLs for pH were established based on eight or more quarters of laboratory data, which are historically higher than field data. EFRI's letter to the Director dated January 31, 2011 proposed the recalculation of the GWCLs for field pH. Following the statistical evaluation of pH data by EFRI's geochemical consultant, INTERA, Inc., EFRI compared the Mill's groundwater pH data from Q2 2011 and noted that all of the June 2011 groundwater results, and many of the other results from Q2 2011, were already outside the revised GWCLs that were to be proposed in the June 30, 2011 letter. Pursuant to teleconferences with DRC on December 5, and December 19, 2011, EFRI submitted a Work Plan and Schedule on January 20, 2012 and a revised plan based on DRC comments on April 13, 2012. Based on the approved Work Plan and Time Schedule, EFRI and DRC entered into a Stipulated Consent Agreement ("SCA") dated July 12, 2012. The SCA required the completion of the pH Report and the Pyrite Investigation and associated report. The pH Report and Pyrite Investigation Report were submitted November 9, 2012 and December 7, 2012 respectively. By letter dated April 25, 2013, DRC accepted the conclusions that the out- of-compliance results for pH are due to background effects within the aquifer matrix and are not caused by Mill activities. DRC also approved the recalculation of the GWCLs. As a result, the 30-day plan and schedule for assessment is not required for field pH exceedances. 3. A Plan and Time Schedule will not be prepared for monitoring wells with two successive exceedances in Q4 2013 if successive exceedances were reported in a previous quarter and were included in the Source Assessment Reports ("SARs"), submitted October 10, 2012, May 8, 2013, August 30, 2013, and January 14, 2014. A Plan and Time Schedule will not be submitted for those constituents covered by the October 10, 2012, May 8, 2013, August 30, 2013, and January 14, 2014 SARs, because the conclusions and actions delineated in those reports were either accepted by DRC as documented in DRC correspondence dated April 25, 2013, July 23, 2013, and September 17, 2013 respectively or are currently under review by DRC. 4. Chloroform and methylene chloride are the subject of the ongoing chloroform pumping program and are covered by State of Utah Notice of Violation ("NOV") and Groundwater Corrective Action Order ("CAO") State of Utah Department of Environmental Quality ("UDEQ") Docket No. UGW-20-01. As a result, the 30-day plan and schedule for assessment of chloroform and methylene chloride exceedances is not required. It is important to note that under the GWDP, GWCLs have been determined on a well-by-well basis to reflect background groundwater quality, as defined by the mean plus second standard deviation concentration, or the equivalent. Accordingly, the GWDP requires that constituent concentrations in each monitoring well shall not exceed the GWCLs set out in Table 2 of the GWDP. It should be noted that, because the GWCLs have been set at the mean plus second standard deviation, or the equivalent, un- impacted groundwater would normally be expected to exceed the GWCLs approximately 2.5% of the time. Therefore, exceedances are expected in approximately 2.5% of all sample results, and do not necessarily represent impacts to groundwater from Mill operations. In fact, more frequent sampling of a given analyte will increase the number of exceedances due to statistical variation and not due to Mill activity. Additionally, given the slow velocity of groundwater movement, accelerated sampling at a monthly frequency can result in resampling of essentially the same water and can lead to repeat exceedances for accelerated constituents not due to Mill activities, but due to repeat sampling of the same water. %fao Letter to Mr. Rusty Lundberg February 10, 2014 Page 3 1.0 Exceedances in Required Quarterly Sampling Wells 1.1 Quarterly Wells with Two Successive Exceedances As indicated in the attached Table 1, the analytes discussed below exceeded their respective GWCLs for two successive sampling periods in Q4 2013. A 30-day plan and schedule contemplated in Part I.G.I c) of the GWDP will not be required for the consecutive exceedances below for the reasons stated below. One-time exceedances and non-successive exceedances are noted on Table 1, but not listed below. Consecutive exceedances which occurred in previous reporting periods are discussed in the SARs submitted to DRC on October 10,2012, May 8, 2013, August 30, 2013, and January 14, 2014. MW-11 • Manganese concentrations exceeded the GWCL in MW-11 in the Q4 2013 and December monthly sampling events. This consecutive exceedance is addressed in the SAR, dated October 10, 2012. As a result of the SAR, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive exceedance is not necessary and will not be submitted. Until such time as the new GWCLs become effective, the exceedances will continue to be noted and reported. MW-26 • Nitrate + nitrite has exceeded its GWCL in all of the Q4 2013 sampling events. As mentioned above, a CAP has been submitted and approved and the specified actions are currently being implemented; therefore a plan to address this consecutive exceedance is not necessary and is not being submitted. • Chloroform has exceeded its GWCL for all of the monitoring periods for Q4 2013. MW-26 is used as a pumping well for the ongoing chloroform capture program and is expected to yield increased concentrations of chloroform. Because this well is used in the chloroform capture program which is the subject of separate investigations and actions, a plan and time schedule to address the consecutive exceedances is not necessary and is not being submitted. • Methylene chloride has exceeded its GWCL for all of the monitoring periods for Q4 2013. MW- 26 is used as a pumping well for the ongoing chloroform capture program and is expected to yield increased concentrations of methylene chloride. Because this well is used in the chloroform capture program which is the subject of separate investigations and actions, a plan and time schedule to address the consecutive exceedances is not necessary and is not being submitted. MW-26 Note: As stated in the September 2009 Statement of Basis (page 23) in support of the January 20, 2010 revisions to the GWDP, "[i]t should be noted that, because MW-26 is a pumping well for chloroform removal, concentrations of all constituents in that well are subject to potential variation over time as a result of the pumping activity. This will be taken into account by the Executive Secretary in determining compliance for this well." Based on information provided by DRC in teleconferences on April 27, and May 2, 2011, due to the current pumping status as part of the chloroform investigation program, the 30-day plan and schedule for assessment is not required at this time for exceedances of chloroform and methylene chloride in MW-26. 'naxerntas Letter to Mr. Rusty Lundberg February 10, 2014 Page 4 • The uranium concentration exceeded its GWCL in all of the monitoring periods for Q4 2013. This consecutive exceedance is addressed in the SAR, dated October 10, 2012. As a result of the SAR, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive exceedance is not necessary and will not be submitted. Until such time as the new GWCLs become effective, the exceedances will continue to be noted and reported. • The chloride concentration exceeded its GWCL in all of the monitoring periods for Q4 2013. As mentioned above, a CAP has been submitted and approved to address nitrate+nitrite contamination which is expected to address chloride in groundwater. The actions specified in the CAP are currently being implemented; therefore a plan to address this consecutive exceedance is not necessary and is not being submitted. MW-30 • Nitrate + nitrite has exceeded its GWCL in all of the Q4 2013 sampling events. As mentioned above, a CAP has been submitted and approved and the specified actions are currently being implemented; therefore a plan to address this consecutive exceedance is not necessary and is not being submitted. • The selenium concentration exceeded its GWCL in all of the Q4 2013 sampling events. This consecutive exceedance is addressed in the SAR, dated October 10, 2012. As a result of the SAR, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive exceedance is not necessary and will not be submitted. Until such time as the new GWCLs become effective, the exceedances will continue to be noted and reported. MW-31 • Nitrate + nitrite has exceeded its GWCL in all of the Q4 2013 sampling events. As mentioned above, a CAP has been submitted and approved and the specified actions are currently being implemented; therefore a plan to address this consecutive exceedance is not necessary and is not being submitted. • The chloride concentration exceeded its GWCL in all of the monitoring periods for Q4 2013. As mentioned above, a CAP has been submitted and approved to address nitrate+nitrite contamination which is expected to address chloride in groundwater. The actions specified in the CAP are currently being implemented; therefore a plan to address this consecutive exceedance is not necessary and is not being submitted. • The sulfate concentration exceeded its GWCL in all sampling events during Q4 2013. This consecutive exceedance is addressed in the SAR, dated October 10, 2012. As a result of the SAR, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive exceedance is not necessary and will not be submitted. Until such time as the new GWCLs become effective, the exceedances will continue to be noted and reported. Wf mam Letter to Mr. Rusty Lundberg February 10, 2014 Page 5 • The selenium concentration exceeded its GWCL in all of the Q4 2013 sampling events. This consecutive exceedance is addressed in the SAR, dated August 30 2013. As a result of the SAR, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive exceedance is not necessary and will not be submitted. Until such time as the new GWCLs become effective, the exceedances will continue to be noted and reported. • The Total Dissolved Solids ('TDS") concentration exceeded its GWCL in the October and December 2013 monthly sampling events. This consecutive exceedance is addressed in the SAR, dated October 10, 2012. As a result of the SAR, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive exceedance is not necessary and will not be submitted. Until such time as the new GWCLs become effective, the exceedances will continue to be noted and reported. MW-35 • The manganese concentration exceeded the GWCL in MW-35 in all of the Q4 2013 sampling events. A plan and schedule to address the Q4 exceedances is not necessary and is not being submitted because, as discussed in the October 10, 2013 SAR, background has not yet been established for MW-35 and the interim GWCLs for MW-35 have been set at a fraction of the Groundwater Quality Standards pending the determination of background. The background report for MW-35 is scheduled to be submitted after the collection of 8 statistically valid data points for each constituent. Exceedances of the interim GWCLs do not necessarily represent impacts to groundwater from Mill activities. • The uranium concentration exceeded the GWCL in MW-35 in all of the Q4 sampling events. A plan and schedule to address the Q4 exceedances is not necessary and is not being submitted because, as discussed in the October 10, 2013 SAR, background has not yet been established for MW-35 and the interim GWCLs for MW-35 have been set at a fraction of the Groundwater Quality Standards pending the determination of background. The background report for MW-35 is scheduled to be submitted after the collection of 8 statistically valid data points for each constituent. Exceedances of the interim GWCLs do not necessarily represent impacts to groundwater from Mill activities. • The Gross Alpha concentration exceeded the GWCL in MW-35 in the Q4 and December monthly sampling events. A plan and schedule to address the Q4 exceedances is not necessary and is not being submitted because, as discussed in the October 10, 2013 SAR, background has not yet been established for MW-35 and the interim GWCLs for MW-35 have been set at a fraction of-the Groundwater Quality Standards pending the determination of background. The background report for MW-35 is scheduled to be submitted after the collection of 8 statistically valid data points for each constituent. Exceedances of the interim GWCLs do not necessarily represent impacts to groundwater from Mill activities. 1.2 Quarterly Wells with New Exceedances Reported in Q4 Two new exceedances for the Q4 2013 quarterly well sampling program are listed below. These exceedances will result in an accelerated sampling frequency from quarterly to monthly. The wells listed 'maernmu Letter to Mr. Rusty Lundberg February 10, 2014 Page 6 below will only be sampled during the monthly events for those constituents that exceeded the GWCLs. The wells listed below will be sampled for all constituents listed in the GWDP during the quarterly events as that is the regularly scheduled sampling for the quarterly wells. It is important to note EFRI requested removal of these constituents from accelerated monitoring by letter dated November 13, 2013. DRC approved the removal of these constituents from monthly accelerated monitoring by letter dated November 14, 2013. The constituents listed below were removed from the monthly accelerated monitoring program beginning with the December 2013 sampling event. The Q4 sample results received in December 2013 reported concentrations above the GWCLs. Accelerated monthly monitoring of these constituents will begin on or before the March 2014 monthly sampling event pursuant to the requirements described below. • Uranium in MW-25 was slightly above the GWCL in the Q4 (November) sampling event. • Uranium in MW-30 was slightly above the GWCL in the Q4 (November) sampling event. Relative to accelerated reporting requirements, based on phone conversations with DRC on April 5, 2010, reporting of exceedances is required to be completed within 30 days of receipt of the last data package for a quarterly monitoring event. Similarly, accelerated monitoring is required to commence the month following the submission of the Exceedance Notice for a specified quarter for wells that are being accelerated from quarterly to monthly and the quarter following the submission of the Exceedance Notice for wells that are being accelerated from semiannually to quarterly. Per teleconferences with DRC, EFRI proposed modified language for the GWDP, Part l.G.l on May 25, 2012, to document DRC concurrence with the accelerated reporting and monitoring agreements resulting from the April 5, 2012 teleconference. 2.0 Exceedances in Semiannual Sampling Wells Accelerated to Quarterly 2.1 Semi-annual Wells with Two Successive Exceedances As indicated in the attached Table 1, the analytes discussed below exceeded their respective GWCLs for two successive sampling periods (Q3 2013 and Q4 2013). MW-1 • Sulfate has exceeded the GWCL for both the Q3 2013 sampling event and the Q4 2013 sampling event. This exceedance for sulfate in MW-1 was discussed in the Plan and Time Schedule submitted to DRC on December 5, 2013 and approved by DRC on December 18, 2013. A SAR will be submitted on or before March 20, 2014. Therefore, a plan and schedule for assessment will not be submitted under separate cover within 30 days of this Exceedance Notice. MW-3 • Fluoride has exceeded the GWCL for both the Q3 2013 sampling event and the Q4 2013 sampling event. This consecutive exceedance is addressed in the SAR, dated October 10, 2012. As a result of the SAR, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive exceedance is not necessary and will not be submitted. Until such time as the new GWCLs become effective, the exceedances will continue to be noted and reported. Letter to Mr. Rusty Lundberg February 10, 2014 Page 7 MW-3A • TDS has exceeded the GWCL for both the Q3 2013 sampling event and the Q4 2013 sampling event. This exceedance for TDS in MW-3A was discussed in the Plan and Time Schedule submitted to DRC on December 5, 2013 and approved by DRC on December 18, 2013. A SAR will be submitted on or before March 20, 2014. Therefore, a plan and schedule for assessment will not be submitted under separate cover within 30 days of this Exceedance Notice. MW-18 • Thallium has exceeded the GWCL for both the Q3 2013 sampling event and the Q4 2013 sampling event. This consecutive exceedance is addressed in the SAR, dated October 10, 2012. In the October 10, 2012 SAR, EFRI requested the removal of GWCLs for the far upgradient wells (MW-1, MW-18, and MW-19) at the Mill which cannot be impacted by Mill activities. In correspondence dated April 25, 2013, DRC noted "DRC agrees with the justification provided by EFR, that far upgradient wells are not likely to be impacted by current Mill activities..." and has recommended the removal of GWCLs for MW-18 from the next revision of the GWDP. A plan and schedule is not necessary because the exceedance is not caused by Mill activities and was previously discussed in the October 10, 2012 SAR. Until such time as the GWCLs are removed, the exceedances will continue to be noted and reported. MW-19 • Nitrate + Nitrite have has exceeded the GWCL for both the Q3 2013 sampling event and the Q4 2013 sampling event. In the October 10, 2012 SAR, EFRI requested the removal of GWCLs for the far upgradient wells (MW-1, MW-18, and MW-19) at the Mill which cannot be impacted by Mill activities. In correspondence dated April 25, 2013, DRC noted "DRC agrees with the justification provided by EFR, that far upgradient wells are not likely to be impacted by current Mill activities..." and has recommended the removal of GWCLs for MW-18 from the next revision of the GWDP. A plan and schedule is not necessary because the exceedance is not caused by Mill activities and was previously discussed in the October 10, 2012 SAR. Until such time as the GWCLs are removed, the exceedances will continue to be noted and reported. MW-24 • Field pH has been slightly outside (slightly lower than) the GWCL for both the Q3 2013 sampling event and the Q4 2013 sampling event. As mentioned above, site-wide pH issues and trends are addressed in reports submitted on November 9, 2012 and December 7, 2012. As a result of the November 7, 2012 report, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive exceedance is not necessary and will not be submitted. Until such time as the new GWCLs become effective, the exceedances will continue to be noted and reported. MW-27 • Nitrate + Nitrite have exceeded the GWCL for both the Q3 2013 sampling event and the Q4 2013 sampling event and during previous quarters. As mentioned above, a CAP has been submitted and approved and the specified actions are currently being implemented; therefore a plan to address this consecutive exceedance is not necessary and is not being submitted. 'oaxcrnmM Letter to Mr. Rusty Lundberg February 10, 2014 Page 8 • The chloride concentration exceeded its GWCL for both the Q3 2013 sampling event and the Q4 2013 sampling event and during previous quarters. As mentioned above, a CAP has been submitted and approved to address nitrate+nitrite contamination which is expected to address chloride in groundwater. The actions specified in the CAP are currently being implemented; therefore a plan to address this consecutive exceedance is not necessary and is not being submitted. • TDS has exceeded the GWCL for both the Q3 2013 sampling event and the Q4 2013 sampling event. This consecutive exceedance is addressed in the SAR, dated October 10, 2012. As a result of the SAR, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive exceedance is not necessary and will not be submitted. Until such time as the new GWCLs become effective, the exceedances will continue to be noted and reported. MW-28 • Chloride has exceeded the GWCL for both the Q3 2013 sampling event and the Q4 2013 sampling event and during previous quarters. As mentioned above, a CAP has been submitted and approved and the specified actions are currently being implemented; therefore a plan to address this consecutive exceedance is not necessary and is not being submitted. MW-29 • Field pH has been slightly outside (slightly lower than) the GWCL for both the Q3 2013 sampling event and the Q4 2013 sampling event. As mentioned above, site-wide pH issues and trends are addressed in reports submitted on November 9, 2012 and December 7, 2012. As a result of the November 7, 2012 report, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive exceedance is not necessary and will not be submitted. Until such time as the new GWCLs become effective, the exceedances will continue to be noted and reported. MW-32 • Field pH has been slightly outside (slightly lower than) the GWCL for both the Q3 2013 sampling event and the Q4 2013 sampling event. As mentioned above, site-wide pH issues and trends are addressed in reports submitted on November 9, 2012 and December 7, 2012. As a result of the November 7, 2012 report, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive exceedance is not necessary and will not be submitted. Until such time as the new GWCLs become effective, the exceedances will continue to be noted and reported. 2.1 Semi-annual Wells with New Exceedances Reported in Q4 Three new exceedances for the Q4 2013 semi-annual well sampling program are listed below. These exceedances will result in an accelerated sampling frequency from .semi-annually to quarterly. It is important to note that the well listed below will only be sampled during the first and third quarterly events for those constituents which exceeded the GWCLs. The well listed below will be sampled for all Letter to Mr. Rusty Lundberg February 10, 2014 Page 9 constituents listed in the GWDP during the second and fourth quarterly events as that is the regularly scheduled sampling for the semi-annual wells. • Sulfate in MW-3 exceeded the GWCL in the Q4 (November) sampling event. • Nitrate + Nitrite in MW-3 exceeded the GWCL in the Q4 (November) sampling event. • Field pH in MW-15 was below the GWCL in the Q4 (November) sampling event. Relative to accelerated reporting requirements, based on phone conversations with UDEQ on April 5, 2010, reporting of exceedances is required to be completed within 30 days of receipt of the last data package for a quarterly monitoring event. Similarly, accelerated monitoring is required to commence the month following the submission of the Exceedance Notice for a specified quarter for wells that are being accelerated from quarterly to monthly and the quarter following the submission of the Exceedance Notice for wells that are being accelerated from semiannually to quarterly. Per teleconferences with UDEQ, EFRI proposed modified language for the GWDP, Part l.G.l on May 25, 2012, to document DRC concurrence with the accelerated reporting and monitoring agreements resulting from the April 5, 2012 teleconference. Yours truly, Kathy Weinel Quality Assurance Manager cc: David Frydenlund Harold Roberts David Turk Dan Hillsten ENERGYFUCLS