The URL can be used to link to this page

Home My WebLink AboutDRC-2017-009221 - 0901a06880780fb4ENERGYFUELS Energy Fuels Resources (USA) Inc. 225 Union Blvd. Suite 600 Lakewood, CO, US, 80228 303 974 2140 www.energvfuels.com November 15, 2017 VIA PDF AND OVERNIGHT DELIVERY Div of Waste Management and Radiation Control Scott Anderson, . DRe-^ir-otmz Director of Waste Management and Radiation Control ' State of Utah Department of Environmental Quality 195 North 1950 West P.O. Box 144880 Salt Lake City, UT 84114-4880 Re: State of Utah Ground Water Discharge Permit No. UGW370004 White Mesa Uranium Mill - Notice Pursuant to Part I.G.l (a) Dear Mr. Anderson: The White Mesa Mill (the “Mill”) performed third quarter (“Q3”) groundwater monitoring during the period from July 1, to September 30, 2017 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 October 24, 2017. Pursuant to Part I.G.l.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 LG. 1 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 Q3 2017 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 Waste Management and Radiation Control (“DWMRC”) Staff. A description of the other actions and reports which have affected the requirement to submit a plan and time schedule are as follows: Letter to Mr. Scott Anderson November 15, 2017 Page 2 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 acknowledged 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 DWMRC in 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 EFRTs 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 DWMRC on December 5, and December 19, 2011, EFRI submitted a Work Plan and Schedule on January 20, 2012 and a revised plan based on DWMRC comments on April 13, 2012. Based on the approved Work Plan and Time Schedule, EFRI and DWMRC 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, DWMRC 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. DWMRC 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 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, December 17, 2013, January 13, 2014, March 19, 2014, December 9, 2015, and June 24, 2016 and the Plan and Time Schedules submitted December 4, 2014, September 10, 2015, and December 3, 2015. A Plan and Time Schedule will not be submitted for those constituents covered by the previously mentioned SARs, because the conclusions and actions delineated in those reports were either accepted by DWMRC as documented in DWMRC correspondence dated April 25, 2013, July 23, 2013, September 17, 2013 January 7, 2014, March 10, 2014, June 5, 2014, and February 19, 2016 respectively. 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. 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 Q3 2017. A 30-day plan and schedule contemplated in Part I.G.l c) of the GWDP will not be required for the consecutive exceedances as noted 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 October 10, 2012, May 8, 2013, August 30, 2013, December 17, 2013, January 13, 2014, March 19, 2014, December 9, 2015, and June 24, 2016 and the Plan and Time Schedules submitted December 4, 2014, and March 10, 2017. MW-11 Letter to Mr. Scott Anderson November 15, 2017 Page 3 • Manganese concentrations exceeded the GWCL in MW-11 in all of the Q3 2017 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 DWMRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DWMRC’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-14 Letter to Mr. Scott Anderson November 15, 2017 Page 4 • Field pH has been slightly outside (slightly lower than) the GWCL in the Q3 (August 2017) and September monthly sampling events. 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 DWMRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DWMRC’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-25 • Field pH has been slightly outside (slightly lower than) the GWCL in the Q3 (August 2017) and September monthly sampling events. 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 DWMRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DWMRC’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 Q3 2017 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 in all of the Q3 2017 sampling events. 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 in the June and July 2017 monthly sampling events. 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 DWMRC 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. • Field pH has been slightly outside (slightly lower than) the GWCL in the July monthly and the Q3 2017 sampling events. 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 DWMRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DWMRC’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 in the July monthly and the Q3 2017 sampling events. 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 Letter to Mr. Scott Anderson November 15, 2017 Page 5 • Nitrate + nitrite has exceeded its GWCL in all of the Q3 2017 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 all of the Q3 2017 sampling events. 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 selenium concentration exceeded its GWCL in all of the Q3 2017 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 DWMRC; The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DWMRC’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 Letter to Mr. Scott Anderson November 15, 2017 Page 6 • Nitrate + nitrite has exceeded its GWCL in all of the Q3 2017 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 Q3 2017. 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 of the Q3 2017 sampling events. This consecutive exceedance is addressed in the revised SAR, dated December 9, 2015 and approved by DWMRC on February 9, 2016. The sulfate exceedances were addressed in the December 9, 2015 SAR, but due to previously identified, naturally occurring, statistically significant rising trends, has exceeded the recalculated GWCLs specified in the December 2015 SAR. As a result, EFRI voluntarily submitted a Plan and Time Schedule for DWMRC approval on March 10, 2017 to evaluate the GWCLs based on the previously identified rising trend. DWMRC approved the Plan and Time Schedule on May 23, 2017. A revised SAR was submitted on August 20, 2017 and 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 Q3 2017 sampling events. This consecutive exceedance is addressed in the revised SAR, dated December 9, 2015 and approved by DWMRC on February 9, 2016. The selenium exceedances were addressed in the December 9, 2015 SAR, but due to previously identified, naturally occurring, statistically significant rising trends, has exceeded the recalculated GWCLs specified in the December 2015 SAR. As a result, EFRI voluntarily submitted a Plan and Time Schedule for DWMRC approval on March 10, 2017 to evaluate the GWCLs based on the previously identified rising trend. DWMRC approved the Plan and Time Schedule on May 23, 2017. A revised SAR was submitted on August 20, 2017 and therefore a plan to address this consecutive exceedance is not necessary and is not being submitted. • The Total Dissolved Solids (“TDS”) exceeded its GWCL in all of the Q3 2017 sampling events. This consecutive exceedance is addressed in the revised SAR, dated December 9, 2015 and approved by DWMRC on February 9, 2016. The TDS exceedances were addressed in the December 9, 2015 SAR, but due to previously identified, naturally occurring, statistically significant rising trends, has exceeded the recalculated GWCLs specified in the December 2015 SAR. As a result, EFRI voluntarily submitted a Plan and Time Schedule for DWMRC approval on March 10, 2017 to evaluate the GWCLs based on the previously identified rising trend. DWMRC approved the Plan and Time Schedule on May 23, 2017. A revised SAR was submitted on August 20, 2017 and therefore a plan to address this consecutive exceedance is not necessary and is not being submitted. Letter to Mr. Scott Anderson November 15, 2017 Page 7 • The uranium concentration exceeded the GWCL in MW-31 in all of the Q3 2017 sampling events. This consecutive exceedance is addressed in Plan and Time Schedule which was submitted to DWMRC on March 10, 2017. DWMRC approved the Plan and Time Schedule on May 23, 2017. A revised SAR was submitted on August 20, 2017 and therefore a plan to address this consecutive exceedance is not necessary and is not being submitted. • Field pH has been slightly outside (slightly lower than) the GWCL in the Q3 and September sampling events. As mentioned above, site-wide pH issues and trends are addressed in reports submitted on November 9, 2012 and December 7, 2012. However, at the time of the November 9, 2012 and December 7, 2012 reports, the pH in MW-31 was not below the GWCLs. Due to the additional pH data available a plan and schedule for assessment will be submitted under separate cover within 30 days of this Exceedance Notice. Additional constituents in MW-31 may be assessed during the Plan and Time Schedule and SAR. It is important to note EFRI requested removal of field pH from accelerated monitoring in MW-31 by letter dated February 9, 2015. DRC approved the removal of these constituents from monthly accelerated monitoring by letter dated March 25, 2015. The sample results reported concentrations outside of the GWCLs. MW-35 • The manganese concentration exceeded the GWCL in MW-35 in June and July 2017 monthly sampling events. A plan and schedule to address this exceedance is not necessary and is not being submitted because the exceedances are based on the interim GWCLs for MW-35, which have been set at a fraction of the Groundwater Quality Standards. Background has been established for MW-35 in the Background Report submitted to DWMRC on May 1, 2014. As a result of the Background Report, the GWCLs have been calculated and accepted by DWMRC in a letter dated July 15, 2014. The calculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DWMRC’s acceptance of the calculated 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. It should be noted that the exceedances of the interim GWCLs noted herein, do not necessarily represent impacts to groundwater from Mill activities. • The uranium concentration exceeded the GWCL in MW-35 in all of the Q3 2017 sampling events. A plan and schedule to address this exceedance is not necessary and is not being submitted because the exceedances are based on the interim GWCLs for MW- 35, which have been set at a fraction of the Groundwater Quality Standards. Background has been established for MW-35 in the Background Report submitted to DWMRC on May 1, 2014. As a result of the Background Report, the GWCLs have been calculated and accepted by DWMRC in a letter dated July 15, 2014. The calculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DWMRC’s acceptance of the calculated GWCLs, a plan and schedule to address this consecutive exceedance is not necessary and will not be submitted. Until Letter to Mr. Scott Anderson November 15,2017 Page 8 such time as the new GWCLs become effective, the exceedances will continue to be noted and reported. It should be noted that the exceedances of the interim GWCLs noted herein, do not necessarily represent impacts to groundwater from Mill activities. • The gross alpha concentrations exceeded the GWCL in MW-35 in all of the Q3 sampling events. A plan and schedule to address this exceedance is not necessary and is not being submitted because the exceedances are based on the interim GWCLs for MW-35, which have been set at a fraction of the Groundwater Quality Standards. Background has been established for MW-35 in the Background Report submitted to DWMRC on May 1, 2014. As a result of the Background Report, the GWCLs have been calculated and accepted by DWMRC in a letter dated July 15, 2014. The calculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DWMRC’s acceptance of the calculated 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. It should be noted that the exceedances of the interim GWCLs noted herein, do not necessarily represent impacts to groundwater from Mill activities. • The selenium concentration exceeded the GWCL in MW-35 in all of the Q3 2017 sampling events. A plan and schedule to address this exceedance is not necessary and is not being submitted because the exceedances are based on the interim GWCLs for MW- 35, which have been set at a fraction of the Groundwater Quality Standards. Background has been established for MW-35 in the Background Report submitted to DWMRC on May 1, 2014. As a result of the Background Report, the GWCLs have been calculated and accepted by DWMRC in a letter dated July 15, 2014. The calculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DWMRC’s acceptance of the calculated 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. It should be noted that the exceedances of the interim GWCLs noted herein, do not necessarily represent impacts to groundwater from Mill activities. • Field pH has been slightly outside (slightly lower than) the GWCL in the Q3 and September monthly sampling events. A plan and schedule to address this exceedance is not necessary and is not being submitted because the exceedances are based on the interim GWCLs for MW-35, which have been set at a fraction of the Groundwater Quality Standards. Background has been established for MW-35 in the Background Report submitted to DWMRC on May 1, 2014. As a result of the Background Report, the GWCLs have been calculated and accepted by DWMRC in a letter dated July 15, 2014. The calculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DWMRC’s acceptance of the calculated 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. It should be noted that the exceedances of the interim GWCLs noted herein, do not necessarily represent impacts to groundwater from Mill activities. Letter to Mr. Scott Anderson November 15, 2017 Page 9 1.2 Quarterly Wells with New Exceedances Reported in Q3 One new exceedance for the Q3 2017 quarterly well sampling program is listed below. This exceedance will result in an accelerated sampling frequency from quarterly to monthly. The well listed below will only be sampled during the monthly events for those constituents that exceeded the GWCLs. The well 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. Accelerated monthly monitoring will continue pursuant to the requirements described below. • Sulfate in MW-11 was slightly above the GWCL in the Q3 (August) sampling event. Relative to accelerated reporting requirements, based on phone conversations with DWMRC 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 DWMRC, EFRI proposed modified language for the GWDP, Part l.G.l on May 25, 2012, to document DWMRC 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 (Q2 2017 and Q3 2017). MW-1 • The chloride concentration exceeded its GWCL in Q2 2017 and Q3 2017. Based on information provided by DWMRC in 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. Additionally, 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, DWMRC noted “DWMRC 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-1 from the next revision of the GWDP. A plan and schedule is not necessary based on information provided by DWMRC in teleconferences on April 27, and May 2, 2011 and 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. • Field pH has been slightly outside (slightly lower than) the GWCL for both the Q2 2017 sampling event and the Q3 2017 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, DWMRC noted “DWMRC 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-3A Letter to Mr. Scott Anderson November 15, 2017 Page 10 • Selenium has exceeded the GWCL for both the Q2 2017 sampling event and the Q3 2017 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 DWMRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DWMRC’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-12 • Selenium has exceeded the GWCL for both the Q2 2017 sampling event and the Q3 2017 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 DWMRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DWMRRC’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. • Field pH has been slightly outside (slightly lower than) the GWCL for both the Q2 2017 sampling event and the Q3 2017 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 DWMRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DWMRC’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-15 Letter to Mr. Scott Anderson November 15, 2017 Page 11 • Field pH has been slightly outside (slightly lower than) the GWCL for both the Q2 2017 sampling event and the Q3 2017 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 DWMRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DWMRC’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-18 • Thallium has exceeded the GWCL for both the Q2 2017 sampling event and the Q3 2017 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, DWMRC noted “DWMRC 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-23 • Field pH has been slightly outside (slightly lower than) the GWCL for both the Q2 2017 sampling event and the Q3 2017 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 DWMRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DWMRC’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-24 • Cadmium has exceeded the GWCL for both the Q2 2017 sampling event and the Q3 2017 sampling event. This consecutive exceedance is addressed in SARs, dated October 10, 2012 and June 24, 2016. As a result of the SARs, the GWCLs have been recalculated and accepted by DWMRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DWMRC’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. Scott Anderson November 15, 2017 Page 12 • Thallium has exceeded the GWCL for both the Q2 2017 sampling event and the Q3 2017 sampling event. This consecutive exceedance is addressed in SARs, dated October 10, 2012 and June 24, 2016. As a result of the SARs, the GWCLs have been recalculated and accepted by DWMRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DWMRC’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. • Field pH has been slightly outside (slightly lower than) the GWCL for both the Q2 2017 sampling event and the Q3 2017 sampling event. This consecutive exceedance is addressed in SARs, dated October 10, 2012 and June 24, 2016. As a result of the SARs, the GWCLs have been recalculated and accepted by DWMRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DWMRC’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 • The nitrate+nitrite concentration exceeded its GWCL for both the Q2 2017 sampling event and the Q3 2017 sampling events. 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-28 • Chloride has exceeded the GWCL for both the Q2 2017 sampling event and the Q3 2017 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 Q2 2017 sampling event and the Q3 2017 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 DWMRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DWMRC’s acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive exceedance is Letter to Mr. Scott Anderson November 15, 2017 Page 13 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. • Field pH has been slightly outside (slightly lower than) the GWCL for both the Q2 2017 sampling event and the Q3 2017 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 DWMRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DWMRC’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. • Chloride has exceeded the GWCL for both the Q2 2017 sampling event and the Q3 2017 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. 2.1 Semi-annual Wells with New Exceedances Reported in Q3 There were no new exceedances for the semi-annual well sampling program. Mark Chalmers David Turk Logan Shumway Scott Bakken Paul Goranson MW-32 Yours truly, ENERGY FUELS RESOURCES (USA) INC. Kathy Weinel Quality Assurance Manager cc:David Frydenlund Table 1 - GWCL Exceedances for Third Quarter 2017 under the August 24, 2012 GWDP Monitoring Weil (Water Class) Q120U Constituent Exceeding GWCL Results GWCL in August 24, 2012 GWDP Q1 2010 Sample Date Ql 2010 Result Q2 2010 Sample Date Q2 2O10 Result May 2010 Monthly Sample Date May 2010 Monthly Result June 2010 Monthly Sample Date June 2010 Monthly Result July 2010 Monthly Sample Date July 2010 Monthly Result August 2010 Monthly Sample Date suits August 2010 Monthly Result Q32010 Sample Date Q3 2010 Result October 2010 Monthly Sample Date October 2010 Monthly Result Q4 2C Q4 2010 Sample Date 110 Results Q4 2010 Result December 2010 Monthly Sample Date December 2010 Monthly Result Required (Quarterly Sam ding Wells MW-11 (Class II)Manganese (ug/L)131.29 134 137 5/24/2010 122 6/16/2010 99 7/20/2010 123 8/25/2010 138 o/Q/on i n 128 10/20/2010 141 I | if ■ IS\f\ f f\ 133 12/15/2010 158 Sulfate (mg/L)1309 1140 1150 NS NA NS NA NS NA NS NA 1140 NS NA 11/11/2010 1180 NS NA MW-14 (Class III) Fluoride (mg/L)0.2 0.15 0.16 NS NA NS NA NS NA NS NA 0.17 NS NA 0.15 NS NA Field pH (S.U.)6.5 - 8.5 2/2/2010 6.45 4/21/2010 6.29 5/21/2010 6/16/2010 6.45 7/20/2010 7.19 8/25/2010 6.48 9/8/2010 6.51 10/20/2010 6.60 11/10/2010 6.37 12/15/2010 6.47 MW-25 (Class III) Field pH (S.U.) 6.5 - 8.5 2/3/2010 6.53 4/28/2010 7.20 NS NA NS NA NS NA NS NA 6.58 NA 6.36 NA Cadmium (ug/L)1.5 1.26 1.44 NA NA NA NA 9/8/2010 1.4 NS NA 11/10/2010 1.26 NS NA Uranium (ug/L)6.5 5.93 6.43 NA NA NA NA 6.57 NA 5.89 NA MW-26 (Class III) Nitrate + Nitrite (as N) (mg/L)0.62 U 2 5/21/2010 0.3 0.4 0.6 0.6 0.7 10/20/2010 0.4 0.2 0.4 Uranium (ug/L)41.8 58.7 66.7 37.4 6/16/2010 36.6 7/21/2010 34.4 71.8 72.7 37.5 11/15/2010 30.4 29.6 Chloroform (ug/L) 70 700 1700 800 940 900 8/16/2010 28(H)2100 1000 1900 1400 Chloride (mg/L)58.31 2/2/2010 72 4/22/2010 57 80 47 52 49 9/26/2010 64 52 48 12/15/2010 52 Field pH (S.U.)6.74 - 8.5 6.59 7.18 6.36 6.98 6.45 6.39 6.60 6.61 6.49 6.45 Methylene Chloride (ug/L)5 1 9.9 NR 2.2 12 24 45 5.5 16 1.2 MW-30 (Class II) Nitrate + Nitrite (as N) (mg/L)2.5 2/9/2010 16.1 15.8 5/21/2010 17 6/15/2010 15.3 7/21/2010 16 8/24/2010 16 IS 10/19/2010 15 11/9/2010 15 16 Chloride (mg/L)128 ill 97 NA NA NS NA NS NA 111 NA 126 NA Uranium (ug/L)8.32 6.82 6.82 NA NA NS NA NS NA 9/14/2010 7.10 NA 6.64 NA Field pH (S.U.)6.5 - 8.5 6.81 4/27/2010 6.55 6.62 7.47 7/21/2010 7/27/2010 6.80 (6.82)8/24/2010 6.73 SI i -ri l.\j i9/21/2010 6.80 (6.84)6.77 6.75 12/14/2010 6.65 Fluoride (mg/L)0.51 0.35 0.35 NA NA NS NA NS NA 0.36 NA 0.36 NA Selenium (ug/L)34 32 35.3 NA NA 7/27/2010 33.5 8/24/2010 35.6 32.6 32.4 32.2 30.5 MW-31 (Class III) Nitrate + Nitrite (as N) (mg/L)5 21.7 22.5 5/21/2010 23 6/15/2010 21.1 7/21/2010 20 8/24/2010 22 21 10/19/2010 20 11/9/2010 20 20 TDS (mg/L)1320 1150 1220 NS NA NS NA NS NA NS NA 1330 NS NA 1320 NS Chloride (mg/L)143 128 128 NS NA NS NA NS NA NS NA 9/13/2010 j (9/21/10) 139 NS NA 138 NS Selenium (ug/L)71 2/9/2010 60.8 4/20/2010 59.6 NS NA NS NA NS NA NS NA 64.4 NS NA 60 12/14/2010 NS Field pH (S.U.)6.5 -8.5 6.96 7.38 5/21/2010 6.95 6/15/2010 7.01 7/21/2010 7.80 8/24/2010 7.10 7.66(7.13) '10/19/2010 6.92 6.98 6.95 Uranium (ug/L)9.1 7.12 6.74 NS NA NS NA NS NA NS NA 7.23 NS NA 6.72 NS Sulfate (mg/L) 532 507 522 NS NA NS NA NS NA NS NA 527 NS NA 539 NS MW-35 (Class II) Manganese (ug/L)200 NA NA NS NA NS NA NA NA NA NS NA 11/30/2010 698 NS NA Gross Alpha minus Rn & U (pCi/L)3.75 NA NA NA NA NA NA NA NA 2.6 NA Field pH (S.U.)65-8.5 NS NA NS NA NA NA NS NA NS NA NS NA NA 7.46 NA Selenium (ug/L)12.5 NA NA NA NA NA NA NA NA ND NA Uranium (ug/L)7.5 NA NA NA NA NA NA NA NA 27.2 NA Required Semi-Annual Sannpling Wells MW-01 (Class II) Chloride (mg/L)22.1 NA 18 NS NA NS NA NS NA NS NA NA NS NA 11/8/2010 15 NS NA Field pH (S.U.)6.77 - 8.5 NS NA 5/5/2010 7.86 (6.87) NA NA NA NA NS NA NA 6.96 NA Sulfate (mg/L)838 NA 805 NA NA NA NA NA NA 792 NA MW-3A (Class HI) Field pH (S.U.)6.5 - 8.5 NS NA 5/4/2010 6.23 (6.24) NS NA NS NA NS NA NS NA 9/21/2010 6.42 NS NA 11/22/2010 6.21 NA Sulfate (mg/L)3640 I'lO NA 3680 NA NA NA NA 3630 NA 3850 INo NA Selenium (ug/L)89 NA 81.4 NA NA NA NA NS NA 94.8 NA MW-05 (Class II)Field pH (S.U.)6.5 - 8.5 NS NA 4/76/2010 7.15 NS NA NS NA NS NA NS NA NS NA NS NA 11/11 MAI A 7.31 NS NAUranium (ug/L)7.5 I'lO NA 0.39 l 1/1 1/2010 11.6 MW-12 (Class III) Selenium (ug/L)25 NS NA 25.7 NS NA NA NA NA 31.9 NA 27.6 NS NA Uranium (ug/L)23.5 NS NA 4/27/2010 19.8 NA NS NA NS NA NS NA 9/20/2010 NA NS NA 11/19/2010 18.0 NA Field pH (S.U.)6.5 - 8.5 NS NA 7.16 NA NA NA NA 6.62 NA 6.47 NA MW-15 (Class III)Selenium (ug/L)128.7 NS NA 4/21 /2010 100 NS NA NS NA NS NA NS NA NS NA wc NA 11/11 MA 1 A 99.5 vro NA Field pH (S.U.)6.62 - 8.5 NA tW 4 1/4U IU 6.98 NA NA NA rNij NA NA INo NA 1 l/l 1/2010 6.57 NS NA Q1 2010 Results Q2 2010 Results 03 2010 R<esults Q4 2010 Results Monitoring Well (Water Class)Constituent Exceeding GWCL GWCL In Current GWDP Q1 Sample Date Q1 Result Q2 Sample Date Q2 Result May Monthly Sample Date May Monthly Result June Month!} Sample Date June Monthly Result July Monthly Sample Date July Monthly Result August Monthly Sample Date August Monthly Result Q3 Sample Date Q3 Result October Monthly Sample Date October Monthly Result Q4 Sample Date Q4 Result December Monthly Sample Date December Monthly Result Required Semi-Annual Samplin Wells, continued MW-18 (Class HI) Thallium (ug/1) 1.95 NS NA 5/4/2010 3.73 NS NA NS NA NA NA 3.64 NS NA 3.57 NA Sulfate (mg/L)1938.9 NA 1950 NA NA NA NA 9/15/2010 1930 NA 1910 NA Field pH (S.U.) 6.25-8.5 NA 6.2 NA NA NS NA NS NA 7.23 NA 11/18/2010 6.31 NS NA TDS (mg/L)3198.77 NA 3280 NA NA NA NA 3190 NA 3030 NA MW-19 (Class HI)Field pH (S.U.) 6.78-8.5 NS NA 5/4/2010 6.61 (6.66) NS NA NS NA NS NA NS NA 9/15/2010 6.93 NS NA 11/18/2010 6.8 NS NA Nitrate + Nitrite (as N) (rag/L)2.83 NA 2.6 NA NA NA NA NA NA 2.4 NA MW-23 (Class III)Field pH (S.U.) 6.5 - 8.5 NS NA 4/22/2010 6.18 NS NA NS NA NS NA NS NA 9/14/2010 7.05 NS NA 11/22/2010 6.44 NS NA MW-24 (Class III) Cadmium (ug/L) 2.5 NA 4.28 NS NA NS NA NA NA 5.06 NS NA 11/17/2010 3.22 NA Fluoride (mg/L)0.36 NA 0.14 NA NA NA NA NA NA 0.18 NA Sulfate (mg/L)2903 NS NA 5/6/2010 2560 NA NA NS NA NS NA 9/21/2010 NA NA 2760 NS NA Thallium (ug/L)1 NA U NA NA NA NA 1.57 NA 1.09 NA Field pH (S.U.)6.5 - 8.5 NA 5.91 (5.78)NA NA NA NA 6.64 NA 6.1 NA MW-27 (Class UI) Nitrate + Nitrite (as N) (mg/L)5.6 NA 5.8 NS NA NS NA NA NA 5.9 NS NA 11/12/2010 5.7 NA Chloride (mg/L)38 NS NA 5/3/2010 42 NA NA NS NA NS NA 9/14/2010 42 NA 45 NS NA Field pH (S.U.)6.5 - 8.5 NA 6.78 NA NA NA NA 7.68 NA 6.84 NA TDS (mg/L)1075 NA 1160 NA NA NA NA 1060 NA 1110 NA MW-28 (Class III) Chloride (mg/L)105 NA 4/19/2010 108 NA NS NA NA NA 106 NS NA 11/12/2010 107 NA Cadmium (ug/L)5.2 NA 4.20 NA NA NA NA NA NA 4.11 NA Uranium (ug/L)4.9 NS NA 3.36 NS NA NA NS NA NS NA 9/14/2010 NA NA 3.45 NS NA Vanadium (ug/L)30 NA <15.0 NA NA NA NA NA NA <15.0 NA Field pH (S.U.)6.1 - 8.5 NA 5.67 NA NA NA NA 5.91 NA 5.72 NA MW-29 (Class III) TDS (mg/L)4400 NA 4/27/2010 4400 NA NS NA NA NA NA NS NA 11/9/2010 4390 NA Sulfate (mg/L) 2946 NS NA 2770 NS NA NA NS NA NS NA NS NA NA 2690 NS NA Field pH (S.U.) 6.46 - 8.5 NA 6.82 NA NA NA NA NA NA 6.17 NA Chloride (mg/L)35.39 NA 30 NA NA NA NA NA NA 35 NA MW-32 (Class HI)Sulfate (mg/L)2556.70 NS NA 4/20/2010 2390 NS NA NS NA NS NA NS NA 9/13/2010 NA NS NA 11/10/2010 2330 NS NA Field pH (S.U.)6.4 - 8.5 NA 6.03 NA NA NA NA 6.33 NA 6.05 NA Notes: GWCL values are taken from August 24, 2012 version of GWDP. NS = Not Required and Not Sampled nxv. = xvcquucu <uiu NA‘=rTut—J Exceedances are shown in yellow Values in () parentheses are the field pH measurements for the resampled analyses. Tabic 1 - GWCL Exceedances for Third Quarter 2017 under the August 24, 2012 GVVDP _ _ Q1201 Q2 20llR^ute 2011 Results Q4 2011 Results Monitoring Weil (Water Class) Constituent Exceeding GWCL GWCL in August 24, 2012 GW DP January 2011 Monthly Sample Date January 2011 Monthly Sample Result Q1 2011 Sample Date Q1 2011 Result March 2011 Monthly Sample Date March 2011 Monthly Result Q2 2011 Sample Date Q2 2011 Result May 2011 Monthly Sample Date May 2011 Monthly Result June 2011 Monthly Sample Date June 2011 Monthly Result July 2011 Monthly Sample Date July 2011 Monthly Result Q3 2011 Sample Date Q3 2011 Result September 2011 Monthly Sample Date September Mil Monthly Result Q4 2011 Sample Date Q4 2011 Result November 2011 Monthly Sample Date November 2011 Monthly Result December 2011 Monthly Sample Date December 2011 Monthly Result MW-11 (Class U) Manganese (ug/L)131.29 1/11/2011 121 2/2/2011 145 3/15/2011 68 4/4/2011 148 5/10/2011 170 6/15/2011 121 7/6/2011 151 8/3/2011 118 9/7/2011 106 i n//t/on 11 112 11/9/2011 105 12/14/2011 100 Sulfate (mg/L)1309 NS NA 1190 NS NA 1140 NS NA NS NA NS NA 1090 NS NA lU/H/ZUI l 1140 NS NA NS NA MW-14 (Class III) Fluoride (mg/L)0.2 NS NA 2/7/2011 0.15 NS NA 4/4/2011 0.15 NS NA NS NA NS NA 8/3/2011 0.15 NS NA 0.16 NS NA NS NA Field pH (S.U.)6.5 - 8.5 1/11/2011 6.37 6.22 3/14/2011 6.76 6.63 5/10/2011 6.37 6/15/2011 5.83 7/5/2011 6.40 6.23 (6.41)9/8/2011 6.50 10/4/2011 6.71 (6.82)11/9/2011 6.63 12/12/2011 6.84 MW-25 (Class III) Field pH (S.U.) 6.5 - 8.5 1/11/2011 6.44 2/2/2011 6.66 3/15/2011 6.79 4/4/2011 6.7 5/11/2011 6.1 6/20/2011 5.77 7/6/2011 6.29 8/3/2011 8/30/11 6.42 (6.54) 9/7/2011 6.54 10/4/2011 6.6 11/9/2011 6.51 12/12/2011 6.87 Cadmium (ug/L)1.5 NA 1.34 NA 1.27 NA NA NA 8/30/2012 1.19 NA 1.27 NA NA Uranium (ug/L)6.5 7.02 4.77 6.8 5.56 6.72 7.06 6.74 6.37 5.96 5.27 6.56 6.1 MW-26 (Class III) Nitrate + Nitrite (as N) (mg/L)0.62 0.2 0.25 3/15/2011 0.6 4/1/2011 0.8 5/10/2011 0.4 6/20/2011 0.3 0.9 8/3/2011 8/30/11 0.6 9/7/2011 2.4 0.9 11/9/2011 1.3 2J Uranium (ug/L)41.8 32 69.3 31.8 60.2 57.4 18.5 57.1 19.0 56.1 58.9 55.6 57 Chloroform (ug/L)70 800 2/16/2011 730 1200 390 1900 730 300 1000 1300 440 1200 1400 Chloride (mg/L)58.31 1/12/2011 52 59 64 64 54 39 7/6/2011 64 60 66 10/12/2011 61 55 12/14/2011 62 Field pH (S.U.) 6.74 - 8.5 6.83 6.06 6.89 6.22 6.43 6.52 6.35 6.07 (6.58)6.71 6.82 6.75 7.1 Methylene Chloride (ug/L)5 <1.0 10 14 3.1 20 7 2.4 10 7.9 2.6 8.9 11 MW-30 (Class II) Nitrate + Nitrite (as N) (mg/L)2.5 1/10/2011 15 2/1/2011 16 17 4/11/2011 16 5/10/2011 16 17 17 8/3/2011 14 9/7/2011 16 16 11/8/2011 16 16 Chloride (mg/L)128 NA 134 NA 134 128 127 127 126 145 129 122 124 Uranium (ug/L)8.32 NA 5.97 NA 6.49 NA NA NA 8 NA 10/4/2011 11/29/2011 9.83 NA NA Field pH (S.U.)6.5 - 8.5 6.65 6.96 3/14/2011 7.10 6.83 6.70 6/20/2011 5.66 7/5/2011 6.65 6.61 6.80 6.96 (6.73)6.83 12/12/2011 7.14 Fluoride (mg/L)0.51 NA 0.34 NA 0.34 NA NA NA 0.33 NA 0.37 NA NA Selenium (ug/L)34 36.2 34.7 34 44.4 38.3 38.7 32.4 39.7 32.4 36.6 36.8 38 MW-31 (Class III) Nitrate + Nitrite (as N) (mg/L)5 19 21 22 4/1/2011 21 5/10/2011 20 22 7/5/2011 22 8/2/2011 20 9/6/2011 21 21 11/8/2011 (11/29/12) 21 21 TDS (mg/L)1320 1240 1220 1250 1370 1290 1330 1280 1300 1300 1320 1290 1330 Chloride (mg/L)143 NS 145 NA 143 143 145 148 148 148 145 145 148 Selenium (ug/L)71 1/10/2011 NS 2/1/2011 64.6 3/14/2011 NA 65.2 NS 6/20/2011 NS NS 66.2 NS 10/3/2011 68.8 NS 12/12/2011 NS Field pH (S.U.)6.5 - 8.5 6.65 7.21 7.43 7.01 6.73 6.16!6.64 6.67 7.03 7.28 7.01 (7.34)7.46 Uranium (ug/L)9.1 NS 5.77 NS 6.81 NS NS NS 7.68 NS 8.87 NS NS Sulfate (mg/L)532 NS 538 531 503 512 540 532 537 541 539 552 530 MW-35 (Class II) Manganese (ug/L) 200 NA 248 NA 6/7/2011 369 NA NA 7/20/11 348 8/30/2011 267 9/7/11 270 271 11/8/2011 283 247 Gross Alpha minus Rn & U (pCi/L)3.75 NA 2.6 NA 3.7 NA NA NA 4.5 NA 4.4 4.7 4.2 Field pH (S.U.)6.5 - 8.5 NS NA 2/15/2011 7.17 NS NA 7.31 NS NA NS NA 6.49 6.40 6.47 10/3/11 6.59 6.51 12/14/11 6.90 Selenium (ug/L)12.5 NA ND NA ND NA NA NA 9.3 NA 10.5 NA NA Uranium (ug/L)7.5 NA 12.7 NA 21.7 NA NA 24.2 18.3 22.3 20.1 24 23.6 Required Semi-Annual Sampling Wetis Chloride (mg/L)22.1 NA NA NA 18 NA NA NA NA NA 17 NA NA MW-01 (Class II)Field pH (S.U.) 6.77 - 8.5 NS NA NS NA NS NA 4/11/2011 7.06 (7.67)NS NA NS NA NS NA NS NA NS NA 10/11/2011 7.08 (7.51)NS NA NS NA Sulfate (mg/L)838 NA NA NA 704 NA NA NA NA NA 713 NA NA MW-03A (Class III) Field pH (S.U.)6.5 - 8.5 MC NA 2/16/2011 6.05 NS NA 4/13/2011 6.58 NS NA NS NA NS NA 8/11/2011 6.19 NS NA 10/1 1/901 1 6.5 (6.92) NS NA NS NA Sulfate (mg/L) 3640 INo NA 3730 NA 3350 NA NA NA 3560 NA 1U/ 1 l/ZU l 1 3750 NA NA Selenium (ug/L)89 NA 99 NA 85.8 NA NA NA 88.5 NA 95 NA NA XyfAX/ AC TT\Field pH (S.U.)6.5 - 8.5 NS NA 2/14/2011 7.31 NS NA 4/12/2011 7.79 NS NA NS NA NS NA 8/9/2011 7.22 NS NA 10/10/2011 7.41 NS NA NS NAmw-ud (.Class it) Uranium (ug/L)7.5 29.5 7.16 0.5 4.52 Selenium (ug/L)25 NA 39.0 NA 21.7 NA NA NA 25.4 NA 35.4 NA NA MW-12 (Class III)Uranium (ug/L)23.5 NS NA 2/15/2011 NA NS NA 4/5/2011 20 NS NA NS NA NS NA 8/9/2011 NA NS NA 10/6/2011 20.5 NS NA NS NA Field pH (S.U.)6.5 - 8.5 NA 6.43 NA 6.67 NA NA NA 6.13 NA 6.7 (6.97)NA NA Selenium (ug/L)128.7 NS NA NfC NA mc NA 4/12/2011 116 NS NA NS NA NS NA NS NA NS NA 10/10/901 1 112 NS NA NS NA MW-ID (Class 111)Field pH (S.U.)6.62 - 8.5 NA INO NA NA 6.88 no NA l'IO NA l'IO NA l'IO NA l'IO NA 6.70 NA NA Q1 2011 Results Q2 2011 Results Monitoring Well (Water Class) Constituent Exceeding GWCL GWCL in Current GWDP January 2011 Monthly Sample Date January 2011 Monthly Sample Result Q1 2011 Sample Date Q12011 Result March 2011 Monthly Sample Date March 2011 Monthly Result Q2 2011 Sample Date Q2 2011 Result May 2011 Monthly Sample Dale May 2011 Monthly Result June 2011 Monthly Sample Date June 2011 Monthly Result July 2011 Monthly Sample Date July 2011 Monthly Result Q3 2011 Sample Date Q3 2011 Result September 2011 Monthly Sample Date September 2011 Monthly Result Q4 2011 Sample Date Q4 2011 Result November 2011 Monthly Sample Date November 2011 Monthly Result December 2011 Monthly Sample Date December 2011 Monthly Result Required Semi-Ant,Wells, continued MW-18 (Class III) Thallium (ug/1) 1.95 NS NA 3.49 NS NA 3.74 NS NA NS NA NS NA 8/10/2011 9/21/11 4.0 3.39 NS NA 3.83 NS NA NS NA Sulfate (mg/L)1938.9 NA 1770 NA 1780 NA NA NA 1910 NA 2020 NA NA Field pH (S.U.)6.25-8.5 NA 2/15/2011 6.27 NA 4/6/2011 6.71 NA NA NA 5.95(6.30)NA 10/11/2011 6.55 (6.63)NA NA TDS (mg/L)3198.77 NA 3250 NA 3250 NA NA NA 3190 NA 3220 NA NA MW-19 (Class HI)Field pH (S.U.)6.78-8.5 NS NA 2/21/2011 6.78 NS NA 4/5/2011 7.03 NS NA NS NA NS NA 7/20/3011 6.65 NS NA 10/12/2011 6.88 (7.02) NS NA NS NA Nitrate + Nitrite (as N) (mg/L)2.83 NA NS NA 2.6 NA NA NA NS NA 4.0 NA NA MW-23 (Class III)Field pH (S.U.)6.5 - 8.5 NS NA 2/9/2011 6.13 NS NA 4/5/2011 7.14 NS NA NS NA NS NA 8/4/2011 6.38 NS NA 10/6/2011 6.56 (6.77)NS NA NS NA MW-24 (Class III) Cadmium (ug/L)2.5 NA 2.78 NA 2.61 NA NS NA NA 1.46 NS NA 1.78 NS NA NA Fluoride (mg/L)0.36 NS NA NA NA 0.19 NA NA NA NA NA 0.36 NA NA Sulfate (mg/L) 2903 NA 2/10/2011 NA NS NA 4/5/2011 2560 NS NA NA NS NA 8/4/2011 NA NA 10/11/2011 2500 NA NS NA Thallium (ug/L)1 NA 1.42 NA 1.07 NA NA NA <0.50 NA 0.62 NA NA Field pH (S.U.)6.5 - 8.5 NA 5.73 NA 6.12 NA NA NA 6.45 NA 6.44 NA NA MW-27 (Class III) Nitrate + Nitrite (as N) (mg/L)5.6 NS NA 6 NS NA 6.4 NA NS NA NS NA 6 NS NA 6.3 NS NA NA Chloride (mg/L)38 NA 2/9/2011 46 NA 4/5/2011 43 NS NA NA NA 8/8/2011 43 NA 10/5/2011 44 NA NS NA Field pH (S.U.)6.5 - 8.5 NA 6.71 NA 6.79 NA NA NA 6.39 NA 7.17 NA NA TDS (mg/L)1075 NA 1090 NA 1190 NA NA NA 1090 NA 1110 NA NA MW-28 (Class III) Chloride (mg/L)105 NS NA 114 NA 109 NS NA NS NA NS NA 105 NS NA 143 NS NA NA Cadmium (ug/L)5.2 NA NA NA 4.13 NA NA NA NA NA 3.99 NA NA Uranium (ug/L)4.9 NA 2/14/2011 NA NS NA 4/11/2011 3.29 NA NA NA 8/8/2011 NA NA 10/5/2011 3.19 NA NS NA Vanadium (ug/L)30 NA NA NA <15.0 NA NA NA NA NA <15.0 NA NA Field pH (S.U.)6.1 -8.5 NA 5.69 NA 6.01 NA NA NA 5.78 NA 6.07 (6.11)NA NA MW-29 (Class HI) TDS (mg/L)4400 NA NA NA 4080 NS NA NS NA NS NA NA NS NA 4280 NS NA NS NA Sulfate (mg/L) 2946 NS NA NS NA NS NA 4/18/2011 2600 NA NA NA 8/9/2011 NA NA 10/5/2011 2850 NA NA Field pH (S.U.)6.46 - 8.5 NA NA NA 6.45 NA NA NA 6.20 NA 6.52 NA NA MW-32 (Class IH) Chloride (mg/L)35.39 NA NA NA 33 NA NS NA NS NA NA NS NA 34 NS NA NS NA Sulfate (mg/L)2556.70 NS NA 2/9/2011 NA NS NA 4/1/2011 2180 NS NA NA NA 8/2/2011 8/30/11 NA NA 10/3/2011 2370 NA NA Field pH (S.U.)6.4 - 8.5 NA 5.99 NA 6.14 NA NA NA 6.10(6.20)NA 6.35 NA NA Notes: GWCL values are taken from August 24. 2012 version of GWDP. NS = Not Required and Not Sampled I'm. = ivcquucu <uiu I'tui NA = Not Applicable Exceedances are shown in yellow Values in () parentheses are the field pH measurements for the resampled analyses. Table 1 - GWCL Exceedances for Third Quarter 2017 under the August 24, 2012 GWDP Q1 2012 Result]Q2 2012 R«suits Q3 2012 Results Q4 2012 Results Monitoring Well (Water Class) Constituent Exceeding GWCL GWCL in August 24, 2012 GWDP January 2012 Monthly Sample Date January 2012 Monthly Result Q1 2012 Sample Date Q1 2012 Result March 2012 Monthly Sample Date March 2012 Monthly Result April 2012 Monthly Sample Date April 2012 Monthly Result Q2 2012 Sample Date Q2 2012 Result June 2012 Monthly Sample Date June 2012 Monthly Result Q3 2012 Sample Date Q3 2012 Result August 2012 Monthly Sample Date August 2012 Monthly Result September 2012 Monthly Sample Date September 2012 Monthly Result October 2012 Monthly Sample Date October 2012 Monthly Result Q4 2012 Sample Date Q4 2012 Result December 2012 Monthly Sample Date December 2012 Monthly Result Required Quarterly Sampling Wells MW-11 (Class II) Manganese (ug/L)131.29 1/26/2012 102 154 3/13/2012 121 4/10/2012 132 127 6/19/2012 122 7/1 1 /7n 17 135 8/7/2012 166 9/19/2012 130 10/23/2012 161 11/12/2012 138 12/24/2012 137 Sulfate (mg/L)1309 NS NA 1160 NS NA NS NA 1090 NS NA //I I/ZU1Z 1080 NS NA NS NA NS NA 1110 NS NA MW-14 (Class III) Fluoride (rag/L)0.2 NS NA 0.15 NS NA NS NA 0.15 NS NA 0.15 NS NA NS NA NS NA 11/27/2012 0.158 NS NA Field pH (S.U.)6.5 - 8.5 1/24/2012 6.36 2/21/2012 6.57 3/14/2012 6.51 4/12/2012 6.97 5/9/2012 6.73 6/19/2012 6.90 7/11/2012 6.89 8/7/2012 6.58 9/18/2012 7.08 10/23/2012 6.83 6.52 12/18/2012 6.60 MW-25 (Class III) Field pH (S.U.)6.5 - 8.5 1/25/2012 6.63 2/14/2012 6.83 3/14/2012 6.55 4/9/2012 6.58 5/2/2012 6.73 6/18/2012 6.99 7/10/2012 6.88 8/6/2012 6.55 9/18/2012 6.54 10/22/2012 6.54 11/12/2012 6.47 12/24/2012 6.62 Cadmium (ug/L)1.5 NA 1.31 NA NA 1.33 NA 1.24 NA NA NA 1.56 NA Uranium (ug/L)6.5 6.6 6.5 6.93 6.52 5.90 7.6 6.45 6.72 6.01 6.37 6.61 4.83 MW-26 (Class III) Nitrate + Nitrite (as N) (mg/L)0.62 1/25/2012 1.9 2/15/2012 1.2 3 3.4 5/7/2012 6/26/2012 2.9 2.3 7/11/2012 1.9 1.6 1.8 J.5 0.55 1.46 Uranium (ug/L)41.8 64.6 2/21/2012 59.4 31.2 4/11/2012 42.2 18.2 66.0 28.4 67.4 64.9 26.9 56.8 51.3 Chloroform (ug/L)70 1900 2/15/2012 3300 2900 2900 1700 24(H)8/16/2012 970 2200 23(H)4720 4020 1250 Chloride (mg/L)58.31 68 40 3/14/2012 74 82 74 6/19/2012 85 7/11/2012 78 8/8/2012 78 9/19/2012 67 10/24/2012 2.62 11/15/2012 52.9 12/24/2012 65.9 Field pH (S.U.) 6.74 - 8.5 6.59 mjuvu 2/21/2012 6.72 (6.91) (6.71)6.39 6.88 7.00 (7.01)7.00 7/11/2012 8/16/2012 7.10(6.80)6.60 7.40 6.63 6.60 6.78 Methylene Chloride (ug/L)5 13 2/15/2012 24 27 20 10 16 8/16/2012 4.9 17 9.8 15.0 34.6 5.5 MW-30 (Class II) Nitrate + Nitrite (as N) (mg/L)2.5 1/24/2012 17 17 18 4/10/2012 17 16 15 17 18 16 10/23/2012 16.2 18.5 17.2 Chloride (mg/L)128 124 126 128 128 124 131 128 139 130 135 114 122 Uranium (ug/L)8.32 NS NA 7.42 8.38 7.84 6.81 7.8 7.64 8.04 7.67 7.86 7.03 5.80 Field pH (S.U.) 6.5 - 8.5 1/24/2012 6.52 2/14/2012 7.12 3/14/2012 6.86 7.05 5/2/2012 6.95 6/18/2012 7.10 7/10/2012 7.25 8/7/2012 6.95 9/19/2012 7.85 6.80 11/13/2012 6.67 12/26/2012 6.95 Fluoride (mg/L)0.51 NS NA 0.38 NA NA 0.34 NA 0.33 NA NA NA 0.329 NA Selenium (ug/L)34 1/24/2012 33.3 35 39.5 39.1 32.3 37 38.5 38.4 41.9 45.2 36 31.6 MW-31 (Class III) Nitrate + Nitrite (as N) (mg/L)5 21 21 22 4/9/2012 21 20 6/18/2012 6/29/2012 21.6 21 21 21 10/22/2012 18 23.6 22.2 TDS (mg/L)1320 1360 1240 1400 1380 1410 1460 1400 1400 1460 1320 1230 1270 Chloride (mg/L)143 155 150 3/13/2012 152 160 151 138 161 175 172 157 189 170 Selenium (ug/L)71 1/24/2012 NS 2/13/2012 67.8 NS NS 5/2/2012 70.2 NA 7/9/2012 74 8/6/2012 NA 9/18/2012 NA NA 11/6/2012 76.9 12/18/2012 NA Field pH (S.U.)6.5 - 8.5 6.78 7.37 7.13 7.14 7.19 7.28 (7.63)7.53 6.96 7.1 7.05 7.04 7.10 Uranium (ug/L)9.1 NS 7.96 NS NS 7.34 NS 8.17 NS NS NS 8.73 NS Sulfate (mg/L)532 539 538 517 547 532 497 529 571 561 545 557 664 MW-35 (Class II) Manganese (ug/L)2(H)264 253 269 4/10/2012 277 258 304 272 273 283 253 241 240 Gross Alpha minus Rn & U (pCi/L)3.75 6.5 4.1 6.2 4.1 4.5 4.9 3.5 4.2 5.4 4.31 4.23 6.5 Field pH (S.U.)6.5 - 8.5 1/24/2012 6.35 2/14/2012 6.67 3/13/2012 6.48 6.84 5/2/2012 6.61 6/19/2012 6.90 7/10/2012 6.87 8/8/2012 6.74 9/19/2012 6.81 10/23/2012 6.43 11/13/2012 6.50 12/18/2012 6.60 Selenium (ug/L)12.5 NA 19.7 NA NA 11.4 7.0 15.9 18.8 8.2 19.0 15.4 12.1 Uranium (ug/L)7.5 16.1 24.7 24.9 22.4 22.2 22.5 24.5 26.2 22.9 22.4 21.8 21 Required Semi-Annual Sampling Wells Chloride (mg/L)22.1 NA NA NA NA 18 NA NA NA NA NA 18.5 NA MW-01 (CLASS II)Field pH (S.U.)6.77 - 8.5 NS NA NS NA NS NA NS NA 5/1/2012 7.19 NS NA NS NA NS NA NS NA NS NA 11/27/2012 6.98 NS NA Sulfate (mg/L)838 NA NA NA NA 659 NA NA NA NA NA 846 NA MW-03A (Class III) Field pH (S.U.)6.5 - 8.5 NS NA 3/1/2012 6.46 NS NA NS NA 5/15/2012 6.68 NS NA 7/19/2012 7.01 NS NA NS NA NS NA 11/29/2012 6.35 NS NA Sulfate (mg/L) 3640 NA 3020 NA NA 3220 NA 37(H)NA NA NA 2780 NA Selenium (ug/L)89 NA 65.8 NA NA 85.1 NA 99.3 NA NA NA 111 NA mw ns rriacc in Field pH (S.U.)6.5 - 8.5 NS NA 2/28/2012 7.57 NS NA NS NA 5/9/2012 7.38 NS NA 7/16/2012 7.60 NS NA NS NA NS NA 11/27/2012 7.32 NS NAMW-IQ (L.iass 11 j Uranium (ug/L)7.5 IN t\18.6 1.23 0.75 0.402 Selenium (ug/L)25 NA NA NA NA 19.6 NA 20.7 NA NA NA 23.0 NA MW-12 (Class III)Uranium (ug/L)23.5 NS NA 2/29/2012 NA NS NA NS NA 5/10/2012 19.6 NS NA 7/17/2012 NA NS NA NS NA NS NA 11/27/2012 21.5 NS NA Field pH (S.U.) 6.5 - 8.5 NA 6.81 NA NA 6.91 NA 6.98 NA NA NA 6.54 NA Selenium (ug/L)128.7 XfO NA 2/22/2012 NA KTC NA VIC NA 5/9/2012 152 NS NA 7/17/7017 120 NS NA NS NA NA 1 1/14/7017 117 NS NA MW-15 (Class 111)Field pH (S.U.)6.62 - 8.5 IN5 NA 6.84 tNo NA [No NA 6.63 NA //111&\J 7.05 NA NA [NO NA 1 1/ l‘r/^U[4 6.86 mo NA Q1 2012 Results Q2 2012 Results Q3 2012 Results Q4 2012 Results Monitoring Well (Water Class) Constituent Exceeding GWCL GWCL in Current GWDP January 2012 Monthly Sample Date January 2012 Monthly Result Q1 2012 Sample Date Q1 2012 Result March 2012 Monthly Sample Date March 2012 Monthly Resull April 2012 Monthly Sample Date April 2012 Monthly Result Q2 2012 Sample Date Q2 2012 Result June 2012 Monthly Sample Date June 2012 Monthly Result Q3 2012 Sample Date Q3 2012 Result August 2012 Monthly Sample Date August 2012 Monthly Result September 2012 Monthly Sample Date September 2012 Monthly Result October 2012 Monthly Sample Date October 2012 Monthly Result Q4 2012 Sample Date Q4 2012 Result December 2012 Monthly Sample Date December 2012 Monthly Result Required Semi-Annual Sampling Wells, continued Thallium (ug/1)1.95 NA 3.63 NA NA 3.51 NA 3.73 NA NA NA 3.2 NA MW-18 (Class III)Sulfate (mg/L) 1938.9 NA 1920 NA NA 1790 NA 1900 NA NA NA 1210 NA Field pH (S.U.)6.25-8.5 NS NA 2/27/2012 6.6 NS NA NS NA 4/30/2012 6.59 NS NA 7/18/2012 6.64 NS NA NS NA NS NA 11/26/2012 6.51 NS NA IDS (ms/L)3198.77 NA 3230 NA NA 3280 NA 3220 NA NA NA 3160 NA MW-19 (Class III)Field pH (S.U.)6.78-8.5 NS NA 2/28/2012 6.83 NS NA NS NA 5/16/2012 6.86 NS NA 7/19/2012 7.21 NS NA NS NA NS NA 12/13/2012 6.71 NS NA Nitrate + Nitrite (as N) (mg/L)2.83 NA 3.9 NA NA 3.7 NA 4 NA NA NA 3.96 NA MW-23 (Class ni)Field pH (S.U.)6.5 - 8.5 NS NA motion 6.61 NS NA NS NA 5/16/2012 6.74 NS NA 7/17/2012 7.10 NS NA NS NA NS NA 12/5/2012 6.61 NS NA Cadmium (ug/L)2.5 NA 2.25 NA NA 2.01 NA 4.7 NA NA NA 1.35 NA Fluoride (mg/L)0.36 NA NA NA NA 0.14 NA NA NA NA NA 0.558 NA MW-24 (Class III)Sulfate (mg/L)2903 NS NA 2/23/2012 NA NS NA NS NA 5/10/2012 2490 NS NA 7/18/2012 NA NS NA NS NA NS NA 11/29/2012 2310 NS NA Thallium (ug/L)1 NA 0.96 NA NA 0.74 NA 1.36 NA NA NA 0.666 NA Field pH (S.U.)6.5 - 8.5 NA 6.03 NA NA 6.21 NA 6.45 NA NA NA 6.01 NA Nitrate + Nitrite (as N) (mg/L)5.6 NA 6.4 NA NA 6.2 NA 6.7 NA NA NA 6.9 NA MW-27 (Class III)Chloride (mg/L)38 NS NA 2/28/2012 45 NS NA NS NA 5/1/2012 46 NS NA 7/16/2012 47 NS NA NS NA NS NA 11/13/2012 44.2 NS NA Field pH (S.U.) 6.5 - 8.5 NA 7.24 NA NA 7.03 NA 7.40 NA NA NA 6.69 NA TDS (mg/L)1075 NA 1140 NA NA 1170 NA 1150 NA NA NA 1070 NA Chloride (mg/L)105 NA 109 NA NA 114 NA 7/16/2012 8/1/2012 105 NA NA NA ns NA Cadmium (ug/L)5.2 NA NA NA NA 3.85 NA NS NA NA NA NA 4.37 NA MW-28 (Class III)Uranium (ug/L)4.9 NS NA 2/28/2012 NA NS NA NS NA 5/8/2012 3.44 NS NA NS NA NS NA NS NA NS NA 11/14/2012 3.45 NS NA Vanadium (ug/L)30 NA NA NA NA <15.0 NA NS NA NA NA NA <15.0 NA Field pH (S.U.)6.1 - 8.5 NA 6.22 NA NA 6.15 NA 7/16/2012 8/1/2012 6.38 (5.81)NA NA NA 5.98 NA %TDS (mg/L)4400 NA NA NA NA 4600 NA 8/1/2012 4420 NA NA NA 4430 NA MW-29 (Class III)Sulfate (mg/L)2946 NS NA mmon NA NS NA NS NA 5/8/2012 2750 NS NA NS NA NS NA NS NA NS NA 11/14/2012 1340 NS NA Field pH (S.U.)6.46 - 8.5 I'lO NA 7.12 NA NA 6.47 NA 7/16/2012 8/1/2012 6.68(6.45)NA NA NA 6.48 NA Chloride (mg/L)35.39 NA NA NA NA 33 NA 1.4 NA NA NA 32.1 NA MW-32 (Class IH)Sulfate (mg/L)2556.70 NS NA 2/21/2012 NA NS NA NS NA 4/30/2012 2130 NS NA 7/9/2012 NA NS NA NS NA NS NA 11/6/2012 1710 NS NA Field pH (S.U.)6.4 - 8.5 NA 6.57 NA NA 6.40 NA 6.72 NA NA NA 6.23 NA Notes: GWCL values are taken from August 24. 2012 version of GWDP. NS = Not Required and Not Sampled I'tiv = ivcquucu auu inui NA = Not Applicable Exceedances are shown in yellow Values in () parentheses are the field pH measurements for the resampled analyses. Table 1 - GWCL Exceedances for Third Quarter 2017 under the August 24, 2012 GWDP Q1 2013 Re Q2 2013 esul« Monitoring Well (Water Class) Constituent Exceeding GWCL GWCL in August 24, 2012 GW DP January 2013 Monthly Sample Date January 2013 Monthly Result Ql 2013 Sample Date 01 2013 Result March 2013 Monthly Sample Date March 2013 Monthly Result April 2013 Monthly Sample Date April 2013 Monthly Result Q2 2013 Sample Date Q2 2013 Result June 2013 Monthly Sample Date June 2013 Monthly Result Q3 2013 Sample Date Q32013 Result August 2013 Monthly Sample Date August 2013 Monthly Result September 2013 Monthly Sample Date September 2013 Monthly Result October 2013 Monthly Sample Date October 2013 Monthly Result Q4 2013 Sample Date Q4 2013 Result December 2013 Monthly Sample Date December 2013 Monthly Result Re,,..red Quarterly Sampling Wells MW-11 (Class II) Manganese (ug/L)131.29 1/23/2013 115 2/20/2013 139 3/20/2013 164 4/16/2013 181 5/14/2013 144 6/25/2013 135 7/10/70 138 8/20/2013 158 9/18/2013 134 10/22/2013 129 152 12/18/2013 196 Sulfate (mg/L)1309 NS NA 1080 NS NA NS NA 763 NS NA // 1U/ZU13 1240 NS NA NS NA NS NA i i/iy/zuij 1050 NS NA MW-14 (Class III) Fluoride (mg/L)0.2 NS NA 2/26/2013 0.172 NS NA NS NA 5/14/2013 0.169 NS NA 0.191 NS NA NS NA NS NA 0.148 NS NA Field pH (S.U.)Li pcif t 1/23/2013 6.48 6.52 3/20/2013 6.48 4/16/2013 7.58 7.39 6/25/2013 6.54 7/11/2013 6.47 8/20/2013 6.86 9/19/2013 6.48 10/22/2013 6.77 11/20/2013 6.51 12/18/2013 6.74 MW-25 (Class III) Field pH (S.U.)6.5 - 8.5 1/22/2013 6.65 2/20/2013 6.62 3/19/2013 6.41 4/17/2013 7.00 5/14/2013 7.19 6/24/2013 6.61 7/10/2013 6.32 8/19/2013 6.74 9/17/2013 6.54 10/22/2013 6.81 6.62 12/17/2013 6.73 Cadmium (ug/L)1.5 NA 1.35 1.40 1.36 1.52 1.31 1.41 1.57 1.31 1.50 11/19/2013 1.35 1.23 Uranium (ug/L)6.5 5.97 5.39 5.68 5.56 5.88 5.35 6.22 6.42 5.99 5.94 7.13 NA MW-26 (Class III) Nitrate + Nitrite (as N) (mg/L)0.62 1.66 1.38 3/20/2013 1.61 4/17/2013 1.73 5/23/2013 2.01 3.042.11*1.98 8/20/2013 1.77 9/18/2013 3.60 10/23/2013 4.10 1.38 12/18/2013 2.56 Uranium (ug/L) 41.8 65.7 57.8 69 58.8 64.3 71.3 70 72.3 19.9 58.8 75.8 70.4 Chloroform (ug/L)70 1270 ISOO 1340 1680 1210 A/s/on 11 4030* 2410 2110 4170 3420 1220 1680 Chloride (mg/L)58.31 1/24/2013 63.5 2/20/2013 77 73.6 70.4 63.1 tv 3/13 6/25/2013 87.8 77.9*7/11/2013 72.1 70.8 77.3 63.8 11/20/2013 62.3 65.7 Field pH (S.U.)6.74 - 8.5 6.51 6.71 6.70 6.96 7.31 6.85 6.43 7.41 6.71 6.82 6.83 6.93 Methylene Chloride (ug/L)5 6.49 5.53 8.31 10.2 4.07 52.4* (12.1J 14.2 14.6 42.4 29.8 7.64 7.48 MW-30 (Class II) Nitrate + Nitrite (as N) (mg/L)2.5 19.2 2/26/2013 21.4 3/20/2013 14.3 4/17/2013 16.8 18.8 16.1 17.6 8/20/2013 16.4 9/18/2013 16.9 10/22/2013 19.7 19.5 12/18/2013 20.7 Chloride (mg/L)128 128 129 126 117 119 127 130 126 131 128 124 134 Uranium (ug/L)8.32 8.36 7.4 6.85 7.08 6.31 8.22 7.48 7.07 7.00 6.91 8.57 NA Field pH (S.U.)6.5 - 8.5 1/23/2013 6.88 6.93 6.91 7.42 5/15/2013 7.54 6/25/2013 6.93 7/10/2013 6.87 7.06 6.78 6.96 11/20/2013 6.84 7.10 Fluoride (mg/L)0.51 NA 0.373 NA NA 0.331 NA 0.368 NA NA NA 0.335 NA Selenium (ug/L)34 37.2 42.3 39 37.3 39.4 32.1 36.5 36.3 35.2 39.5 36.6 35.1 MW-31 (Class III) Nitrate + Nitrile (as N) (mg/L)5 22.8 2/19/2013 19.3 3/19/2013 19.1 4/16/2013 18.8 23.8 20.0 21.7 8/19/2013 16.0 9/17/2013 21.2 10/23/2013 21.2 23.9 12/17/2013 24.2 TDS (mg/L)1320 1270 1390 1420 1260 1540 1380 1510 1440 1500 1460 1320 1500 Chloride (mg/L)143 176 174 168 171 169 179 182 183 193 188 174 203 Selenium (ug/L)71 1/22/2013 NS 74.1 81.8 72.9 5/13/2013 75.9 6/24/2013 73.7 7/9/2013 75.7 73.2 72.6 80.7 11/18/2013 74.5 79.8 Field pH (S.U.)6.5 - 8.5 6.94 7.32 7.28 6.37 1.92 7.10 6.98 7.36 7.06 7.35 6.99 7.23 Uranium (ug/L)w.l NS 7.33 NS NS 7.63 NS 7.90 NS NS NS 9.03 NS Sulfate (mg/L)532 611 644 611 668 630 659 659 656 666 637 609 656 MW-35 (Class II) Manganese (ug/L)200 247 272 3/19/13 246 4/17/2013 243 5/13/2013 252 243 250 262 9/17/2013 257 10/23/2013 240 251 12/17/2013 260 Gross Alpha minus Rn & U (pCi/L)3.75 6.62 2/26/2013 5.09 9.51 4.75 4.92 6/24/2013 3.24 5.70 8/19/2013 3.92 5.10 3.73 5.39 4.74 Field pH (S.U.)6.5 - 8.5 1/23/2013 6.54 6.68 6.43 6.96 7.33 6.70 7/9/2013 6.51 1.02 6.50 6.83 11/19/2013 6.52 6.73 Selenium (ug/L)12.5 11.0 10.8 22.6 11.8 16.1 13.6 8.01 <5 <5 19.8 <5 <5 Uranium (ug/L)7.5 23.6 21.3 22.1 20.0 22.0 19.3 23.0 21.4 20.2 21.8 24.1 20 Required Senii-Annual Sampling Welts MW-01 (Class 11) Chloride (mg/L)22.1 NA 3/12/2013 NA NS NA NS NA 5/21/2013 17.8 NA NA NS NA NS NA NS NA 18.7 NS NA Field pH (S.U.)6.77 - 8.5 NS NA 6.77 NA NA 7.57 NS NA 7/23/2013 7.04 NA NA NA 12/4/2013 7.04 NA Sulfate (mg/L)838 NA 761 NA NA 839 NA 911 NA NA NA 930 NA MW-03A (Class III) Field pH (S.U.)61-8.5 NS NA 3/13/2013 6.84 NS NA NS NA 5/23/2013 7.10 NS NA 7/19/2013 6.50 NS NA NS NA NS NA 12/11/2013 6.98 NS NA Sulfate (mg/L)3640 1'tO NA 3480 NA NA 3120 NA 3670 NA NA NA 3360 NA Selenium (ug/L)89 NA 88.7 NA NA 75.6 NA 79.7 NA NA NA 77.9 NA MW-05 (Class II)Field pH (S.U.) 6.5 - 8.5 NS NA 3/11/2013 7.39 NS NA NS NA 5/14/2013 8.01 NS NA 7/18/2013 7.39 NS NA NS NA NS NA 12/4/2013 7.58 NS NAUranium (ug/L)7.5 I'lij 36 1.33 0.574 20.1 MW-12 (Class III) Selenium (ug/L)25 NA 19.6 NS NA NA 19 NA 20.5 NS NA NS NA NS NA 21.7 NS NA Uranium (ug/L)23.3 NS NA 3/6/2013 NA NA NS NA 5/15/2013 18.6 NS NA 7/17/2013 NA NA NA NA 12/9/2013 23.3 NA Field pH (S.U.)6.5 - 8.5 NA 6.56 NA NA 7.19 NA 6.60 NA NA NA 6.69 NA MW-15 (Class III)Selenium (ug/L)128.7 NS NA •i/s/^n 11 137 NS NA NS NA 5/15/2013 120 NS NA 7/18/301 3 100 NS NA NS NA NS NA 11/20/2013 106 NS NA Field pH (S.U.)6.62 - 8.5 INo NA 6.75 NA NA 7.27 NA / / 10/ —U1 j 6.68 NA NA NA 6.61 NA Q1 2013 Results 02 2013 Results Q3 ►013 Results Q4 201-1 Results Monitoring Welt (Water Class) Constituent Exceeding GWCL GWCL in Current GWDP January 2013 Monthly Sample Date January 2013 Monthly Result 01 2013 Sample Date Q1 2013 Result March 2013 Monthly Sample Date March 2013 Monthly Result April 2013 Monthly Sample Date April 2013 Monthly Result Q2 2013 Sample Date Q2 2013 Result June 2013 Monthly Sample Date June 2013 Monthly Result Q3 2013 Sample Date Q3 2013 Result August 2013 Monthly Sample Date August 2013 Monthly Result September 2013 Monthly Sample Date September 2013 Monthly Result October 2013 Monthly Sample Date October 2013 Monthly Result Q4 2013 Sample Date Q4 2013 Result December 2013 Monthly Sample Date December 2013 Monthly Result Required Serni-Annual Sampling Wells, continued MW-18 (Class HI) Thallium (ug/1)1.95 NA 2/25/2013 3.26 NS NA NA 5/20/2013 2.81 NS NA 3.32 NS NA NA NA 12/3/2013 3.06 NA Sulfate (mg/L)1938.9 NA 1270 NA NA 1860 NA 1860 NA NA NA 2000 NA Field pH (S.U.)6.25-8.5 NS NA 6.35 NA NS NA 6.97 NA 7/15/2013 6.45 NA NS NA NS NA 6.38 NS NA TDS (mg/L)3198.77 NA 3350 NA NA 3160 NA 3170 NA NA NA 3240 NA MW-19 (Class III)Field pH (S.U.)6.78-8.5 NS NA 3/13/2013 6.50 NS NA NS NA 5/20/2013 7.16 NS NA 7/15/2013 6.91 NS NA NS NA NS NA 12/3/2013 6.58 NS NA Nitrate + Nitrite (as N) (mg/L)2.83 NA 3.61 NA NA 4.21 NA 3.66 NA NA NA 3.70 NA MW-23 (Class III)Field pH (S.U.)6.5 - 8.5 NS NA 3/11/2013 6.37 NS NA NS NA 5/23/2013 7.23 NS NA 7/18/2013 6.61 NS NA NS NA NS NA 12/18/2013 7.21 NS NA MW-24 (Class III) Cadmium (ug/L)2.5 NA 2.0 NS NA NA 5/22/2013 1.32 NS NA 6.72 NS NA NA NA 1.15 NS NA Fluoride (mg/L)0.36 NA 3/13/2013 0.355 NA NA 0.211 NA 0.288 NA NA NA 0.310 NA Sulfate (mg/L)2903 NS NA NA NA NS NA 2010 NA 7/19/2013 NA NA NS NA NS NA 12/12/2013 2490 NA Thallium (ug/L)1 NA 0.88 NA NA 0.618 NA 1.64 NA NA NA 0.707 NA Field pH (S.U.)6.5 - 8.5 NA 6.29 NA NA 6.77 NA 5.80 NA NA NA 6.08 NA MW-27 (Class III) Nitrate + Nitrite (as N) (mg/L)5.6 NA 2/25/2013 7.94 NS NA NS NA 5/21/2013 7.09 NS NA 6.97 NS NA NA NS NA 7.89 NS NA Chloride (mg/L)38 NS NA 50.3 NA NA 44.3 NA 7/17/2013 44.2 NA NS NA NA 12/4/2013 45.0 NA Field pH (S.U.)6.5 - 8.5 NA 7.03 NA NA 7.58 NA 7.00 NA NA NA 7.16 NA TDS (mg/L)1075 NA 1140 NA NA 1110 NA 1110 NA NA NA 1100 NA MW-28 (Class III) Chloride (mg/L)105 NA 3/5/2013 110 NA NS NA 5/15/2013 102 NS NA 107 NS NA NA NS NA 109 NS NA Cadmium (ug/L)5.2 NA NA NS NA NA 4.61 NA NA NA NA NA 4.74 NA Uranium (ug/L)4.9 NS NA NA NA NA 3.58 NA 7/17/2013 NA NA NS NA NA 12/4/2013 3.34 NA Vanadium (ug/L) 30 NA NA NA NA <15.0 NA NA NA NA NA <15.0 NA Field pH (S.U.)6.1 -8.5 NA 6.00 NA NA 6.63 NA 5.97 NA NA NA 6.10 NA MW-29 (Class III) TDS (mg/L)4400 NS NA 3/6/2013 4500 NS NA NS NA 5/23/2013 4340 NS NA 4270 NS NA NA NS NA 4370 NS NA Sulfate (mg/L) 2946 NA NA NA NA 2450 NA 7/17/2013 NA NA NS NA NA 11/20/2013 2750 NA Field pH (S.U.) 6.46 - 8.5 NA 6.36 NA NA 6.88 NA 6.37 NA NA NA 6.3S NA Chloride (mg/L)35.39 NA NA NA NA 32.3 NA NA NA NA NA 33.7 NA MW-32 (Class IU)Sulfate (mg/L)2556.70 NS NA 2/19/2013 NA NS NA NS NA 5/13/2013 1800 NS NA 7/9/2013 NA NS NA NS NA NS NA 11/18/2013 2110 NS NA Field pH (S.U.)6.4 - 8.5 NA 6.52 NA NA 7.10 NA 6.39 NA NA NA 6.29 NA Notes: GWCL values are taken from August 24, 2012 version of GWDP. NS = Not Required and Not Sampled I'tiv = rvcquucu <uiu NA = Not Applicable Exceedances are shown in yellow Values in () parentheses are the field pH measurements for the resampled analyses. Table 1 - GVVCL Exceedances for Third Quarter 2017 under the August 24, 2012 GVVDP Q1 2014 ResuKs Q3 20X4 Results Q4 2M4 Remits Monitoring Well (Water Class) CWCL GWCL in August 24, 2012 GWDP January 2014 Monthly Sample Date January 2014 Monthly Result February 2014 Monthly Sample Date February 2014 Monthly Result Ql 2014 Sample Date Ql 2014 Result April 2014 Monthly Sample Date April 2014 Monthly Result May 2014 Monthly Sample Date May 2014 Monthly- Result Q2 2014 Sample Date Q2 2014 Result July 2014 Monthly Sample Date July 2014 Monthly Result August 2014 Monthly Sample Date August 2014 Monthly Result Q3 2014 Sample Date Q3 2014 Result October 2014 Monthly Sample Date October 2014 Monthly Result Q4 2014 Sample Date Q4 2014 Result December 2014 Monthly Sample Date December 2014 Monthly Result Required Quarterly Sampling Wells MW-11 (Class II) Manganese (ug/L)131.29 1/8/2014 141 2/24/2014 163 3/11/2014 134 4/25/2014 136 5/14/2014 128 6/3/2014 166 7/29/2014 139 8/20/2014 139 9/8/2014 74 10/6/2014 157 1 1 / 1 T /'‘lA 1 A 125 12/10/2014 186 Sulfate (mg/L)1309 NS NA 1150 904 NS NA NS NA 1140 NS NA NS NA 1030 NS NA 11/1//A) 14 1140 NS NA MW-14 (Class III) Fluoride (mg/L)0.2 NS NA 0.139 3/11/2014 0.188 NS NA NS NA 0.154 NS NA NS NA 9/2/2014 0.2 NS NA <0.1 NS NA Field pH (S.U.)6.5 - 8.5 1/8/2014 6.60 2/24/2014 6.16 6.33 4/23/2014 6.84 5/13/2014 6.60 6/3/2014 7.63 7/28/2014 6.44 8/20/2014 7.07 6.41 10/7/2014 6.46 11/12/2014 6.25 12/10/2014 6.40 MW-25 (Class III) Field pH (S.U.)6.5 - 8.5 1/7/2014 6.37 2/13/2014 6.10 3/10/2014 6.27 4/28/2014 7.18 5/13/2014 6.80 6/2/2014 6.74 7/28/2014 6.36 8/18/2014 7.17 9/3/2014 6.50 10/6/2014 6.49 11/4/2014 6.31 12/9/2014 6.36 Cadmium (ug/L)1.5 1.39 1.29 1.29 LSI 1.34 1.24 1.30 1.30 1.30 1.41 1.57 1.21 Uranium (ug/L) 6.5 NA 5.83 6.26 10.6 7.43 6.07 5.9 6.1 6.0 6.67 6.04 5.75 MW-26 (Class HI) Nitrate + Nitrite (as N) (mg/L)0.62 2.42 2/24/2014 2.12 3/12/2014 UO 1.20 5/14/2014 1.64 1.42 2.0 8/20/2014 1.00 9/4/2014 UO 10/7/2014 0.704 1.09 <0.100 Uranium (ug/L)41.8 81.7 72.2 51.8 96.0 90.6 75.0 7/29/2014 86.5 74.4 48.4 75.4 66.0 42.5 Chloroform (ug/L)70 1580 2810 2800 1310 1580 6/5/2014 1450 2330 2200 1580 894 11/18/2014 1520 2280 Chloride (mg/L)58.31 1/8/2014 69.7 70.4 61.0 4/30/2014 62.1 61.0 63.2 80.0 59.0 68.0 57.7 54.2 12/10/14 12/15/14 65.5 Field pH (S.U.)6.74 - 8.5 6.80 6.78 6.50 7.19 7.13 6.78 6.60 7.28 6.67 6.85 6.09 6.25(6.44) Methylene Chloride (ug/L)5 6.52 25.8 15.5 5.54 10.2 6.73 9.6 43.3 10.9 3.78 7.34 28.4 MW-30 (Class II) Nitrate + Nitrite (as N) (mg/L)2.5 20.3 2/25/2014 18.4 21.3 18.3 5/14/2014 17.9 19.4 15.6 8/20/2014 13.8 9/9/2014 16.8 11.0 16.2 17.1 Chloride (mg/L)128 131 135 144 154 128 128 140 139 136 136 154 12/10/2014 138 Uranium (ug/L)8.32 NA 6.83 3/11/2014 7.84 6.84 9.82 7.35 7.40 7.60 7.70 7.76 7.65 7.67 Field pH (S.U.)6.5 - 8.5 1/8/2014 6.74 6.80 6.56 4/23/2014 7.06 6.88 6/3/2014 6.89 7/29/2014 6.76 7.51 6.82 10/7/2014 6.92 11/10/2014 6.22 6.11 Fluoride (mg/L)0.51 NA 0.332 0.357 NA NA 0.342 NA NA 0.40 NA 0.262 NA Selenium (ug/L)34 35.6 35.8 38.0 32.8 37.0 35.4 42.9 48.5 53.6 38.9 36.8 37.5 MW-31 (Class III) Nitrate + Nitrite (as N) (mg/L)5 24.0 20.6 26.2 19.1 5/13/2014 23.3 23.1 7/28/2014 19.0 8/18/2014 15.2 9/3/2014 18.9 10/6/2014 15.9 20.9 17.0 TDS (mg/L)1320 1510 1460 1490 1440 1510 6/2/2014 1520 1400 1410 1460 1420 1520 1450 Chloride (mg/L)143 194 197 230 230 200 173 200 210 210 205 204 12/9/2014 215 Selenium (ug/L)71 1/7/2014 74.4 2/17/2014 75.8 3/10/2014 77.2 4/28/2014 85.4 74.5 69.4 77.9 82.8 81.5 78.9 11/14/2014 73.0 71.1 Field pH (S.U.)6.5 - 8.5 7.13 6.45 6.53 7.45 6.83 8.23 6.88 7.60 6.94 6.97 6.69 6.73 Uranium (ug/L)9.1 NS 7.65 7.96 NS NS 7.72 NS NS 8.40 NS 7.71 NS Sulfate (mg/L) 532 558 480 681 527 639 sss 600 620 560 606 639 687 MW-35 (Class II) Manganese (ug/L) 200 252 247 204 194 5/14/2014 249 202 212 191 9/3/2014 177 10/6/2014 228 11/12/2014 222 12/9/2014 232 Gross Alpha minus Rn & U (pCi/L)3.75 4.12 3.98 4.33 2.95 3.67 3.36 3.09 8/20/2014 4.70 3.93 4.14 3.92 4.54 Field pH (S.U.)6.5 - 8.5 1/8/2014 6.54 2/11/2014 6.07 3/11/14 6.32 4/25/2014 6.79 7.10 6/4/2014 6.83 7/29/2014 6.55 7.07 6.46 6.54 6.35 6.25 Selenium (ug/L)12.5 8.95 12.3 14J 18.6 17.0 13.9 13.2 28.9 31.4 15.5 10.1 7.5 Uranium (ug/L)7.5 20.8 20.6 21.5 30.6 26.9 21.9 26.5 20.3 23.6 23.9 19.6 20.3 Require!1 Semi-Annual Sampling W,ills MW-01 (Class II) Chloride (mg/L)22.1 NA NS NA 2/20/2014 NA NA NA 20.4 NA NS NA 9/10/2014 NA NS NA 19 NS NA Held pH (S.U.)6.77 - 8.5 NS NA NA 6.61 NS NA NS NA 5/28/2014 7.11 NS NA NA 6.75 NA 11/17/2014 6.87 NA Sulfate (mg/L)838 NA NA 836 NA NA 909 NA NA 810 NA 920 NA MW-03A (Class III)Held pH (S.U.)6.5 - 8.5 NS NA NS NA 3/5/2014 6.58 NS NA NS NA 5/30/2014 6.60 NS NA NS NA 9/17/2014 6.40 NS NA 11/12/2014 6.41 NS NA Sulfate (mg/L)3640 NA NA 3100 NA NA 3830 NA NA 3350 NA 3770 NA Selenium (ug/L)89 NA NA 92.1 NA NA 104 NA NA 129 NA 88.5 NA MW-05 (Class II)Held pH (S.U.) 6.5 - 8.5 NS NA NS NA 2/12/2014 6.87 NS NA NS NA 6/4/2014 7.58 NS NA NS NA 9/11/2014 7.13 NS NA 11/12/2014 6.92 NS NAUranium (ug/L)7.5 22.9 2.42 0.90 36.20 MW-12 (Class III) Selenium (ug/L)25 NA NS NA 23.7 NA NS NA 6/4/2014 17.20 NA NA 9/16/2014 NA NS NA 33.30 NS NA Uranium (ug/L)23.5 NS NA NA 2/12/2014 NA NS NA NA 20.20 NS NA NS NA NA NA 11/11/2014 20.80 NA Field pH (S.U.)6.5 - 8.5 NA NA *.13 NA NA 7.10 NA NA 6.47 NA 6.25 NA MW-15 (Class III)Selenium (ug/L)128.7 MC NA vre NA 2/25/2014 no Njc NA MO NA f,/dnr\ i d 105 isje NA mc NA Q/O/Ofl 1 A 273 MC NA 1 1 / 1 T/HA » A 106 NS NA Field pH (S.U.)6.62 - 8.5 [No NA [No NA 6.51 [NO NA INO NA 6.91 [No NA INo NA 6.38 NA 1 [/12/Zln4 6.41 NA Q1 2014 Resuits 02 2014 R*‘suits 03 2014[t esuits Q4 2014 Results Monitoring Well (Water Class) Constituent Exceeding GWCL GWCL in Current GWDP January 2014 Monthly Sample Date January 2014 Monthly Result February 2014 Monthly Sample Date February 2014 Monthly Result Q1 2014 Sample Date Q1 2014 Result April 2014 Monthly Sample Date April 2014 Monthly Result May 2014 Monthly Sample Date May 2014 Monthly Result Q2 2014 Sample Date Q2 2014 Result April 2014 Monthly Sample Date April 2014 Monthly Result May 2014 Monthly Sample Date May 2014 Monthly- Result Q3 2014 Sample Date Q3 2014 Result October 2014 Monthly Sample Date October 2014 Monthly Result Q4 2014 Sample Date Q4 2014 Result December 2014 Monthly Sample Date December 2014 Monthly Result Required Semi-Annual Samphng Welis, ecmtinued MW-18 (Class HI) Thallium (ug/1)1.95 NS NA NS NA 2/19/2014 2.77 NS NA NS NA 5/27/2014 2.42 NA NS NA 9/9/2014 2.7 NA 11/10/2014 2.88 NS NA Sulfate (mg/L)1938.9 NA NA 1650 NA NA 2020 NA NA 1760 NA 1810 NA Field pH (S.U.) 6.25-8.5 NA NA 6.16 NA NA 7.04 NS NA NA 6.40 NS NA 6.10 NA TDS (mg/L)3198.77 NA NA 3080 NA NA 3260 NA NA 3180 NA 2960 NA MW-19 (Class UI)Field pH (S.U.)6.78-8.5 NS NA NS NA 2/18/2014 6.29 NS NA NS NA 5/27/2014 7.38 NS NA NS NA 9/11/2014 6.46 NS NA 11/11/2014 6.33 NS NA Nitrate + Nitrite (as N) (mg/L)2.83 NA NA 3.82 NA NA 3.68 NA NA 0.4 NA 2.91 NA MW-23 (Class HI)Field pH (S.U.)6.5 - 8.5 NS NA NS NA 3/5/2014 6.52 NS NA NS NA 6/11/2014 6.67 NS NA NS NA 9/4/2014 6.56 NS NA 11/19/2014 6.69 NS NA MW-24 (Class III) Cadmium (ug/L)2.5 NS NA NS NA 5.92 NS NA NS NA 5/30/2014 2.91 NA NS NA 9/17/2014 1.5 NA 11/19/2014 1.17 NS NA Fluoride (mg/L)0.36 NA NA 0.234 NA NA 0.337 NA NA 0.4 NA 0.109 NA Sulfate (mg/L) 2903 NA NA 3/6/2014 NA NA NA 2450 NS NA NA NA NS NA 3120 NA Thallium (ug/L)l NA NA 1.85 NA NA 1.23 NA NA 0.6 NA 0.821 NA Field pH (S.U.) 6.5 - 8.5 NA NA 5.89 NA NA 6.07 NA NA 5.09 NA 5.69 NA MW-27 (Class III) Nitrate + Nitrite (as N) (mg/L)5.6 NS NA NS NA 2/25/2014 7.98 NS NA NS NA 5/28/2014 7J5 NA NS NA 9/8/2014 6.30 NA 11/5/2014 7.70 NS NA Chloride (mg/L)38 NA NA 47.0 NA NA 45.9 NS NA NA 46.0 NS NA 42.6 NA Field pH (S.U.)6.5 - 8.5 NA NA 6.62 NA NA 7.80 NA NA 6.97 NA 6.70 NA TDS (mg/L)1075 NA NA 1040 NA NA 1040 NA NA 1020 NA 1090 NA MW-28 (Class III) Chloride (mg/L)105 NA NS NA 2/26/2014 113 NS NA NS NA 6/18/2014 114 NA NS NA 9/16/2014 112 NA 11/5/2014 117 NS NA Cadmium (ug/L)5.2 NA NA NA NA NA 5.41 NA NA 4.7 NA 4.15 NA Uranium (ug/L) 4.9 NS NA NA NA NA NA 61.3 NS NA NA 10.6 NS NA 21.2 NA Vanadium (ug/L)30 NA NA NA NA NA 109 NA NA 18.5 NA 29.3 NA Field pH (S.U.)6.1 -8.5 NA NA 6.01 NA NA 6.78 NA NA 5.79 NA 5.72 NA MW-29 (Class III) TDS (mg/L)4400 NA NS NA 4500 NS NA NS NA 6/3/2014 4200 NA NS NA 9/10/2014 4280 NA 11/10/2014 4210 NS NA Sulfate (mg/L) 2946 NS NA NA 2/25/2014 NA NA NA 2510 NS NA NA NA NS NA 2760 NA Field pH (S.U.) 6.46 - 8.5 NA NA 6.78 NA NA 7.98 NA NA 6.10 NA 6.11 NA Chloride (mg/L)35.39 NA NA NA NA NA 35.6 NA NA 8/26/2014 NA 33.3 NA MW-32 (Class HI)Sulfate (mg/L)2556.70 NS NA NS NA 2/11/2014 NA NS NA NS NA 5/23/2014 1990 NS NA NS NA NS NA NS NA 11/5/2014 2210 NS NA Field pH (S.U.) 6.4 - 8.5 NA NA 6.15 NA NA 6.64 NA NA 9/2/2014 6.17 NA 6.08 NA Notes: GWCL values are taken from August 24. 2012 version of GWDP. NS = Not Required and Not Sampled NR = Required and Not Reported NA = Not Applicable Exceedances are shown in yellow Values in () parentheses are the field pH measurements for the resampled analyses. Q1 2015 Results 02 2015 Results Q3 2015 Results 04,115 Results Monitoring Well (Water Class) Constituent Exceeding GW'CL GWCL in August 24. 2012 GW DP January 2015 Monthly Sample Date January 2015 Monthly Result Ql 2015 Sample Date Ql 2015 Result March 2015 Monthly Sample Date March 2015 Monthly Result Q2 2015 Sample Date Q2 2015 Result May 2015 .Monthly Sample Date May 2015 Monthly Result June 2015 Monthly Sample Date June 2015 Monthly Result July 2015 Monthly Sample Date July 2015 Monthly Result Q3 2015 Sample Date Q3 2015 Result .Monthly Sample Date Monthly Result October 2015 Monthly Sample Date October :»15 Monthly Result Q4 2«I5 Sample Date Q4 2015 Result December 2015 Monthly Sample Date December 2015 Monthly Result Required Quarterly Sampling W'elb MW-11 (Class II)Manganese (ug/L)131.29 1/21/2015 177 2/3/2015 138 3/3/2015 149 4/8/2015 170 5/11/2015 123 6/23/2015 149 7/7/2015 178 8/10/2015 138 9/16/2015 tm 10/7/2015 237 i i / it /on i ^126 12/8/2015 139 Sulfate (mg/L)1309 NS NA 1110 NS NA 1170 NS NA NS NA NS NA 1050 NS NA NS NA 11/1L/ZU1 j 1220 NS NA MW-14 (Class III) Fluoride (mg/L)0.2 NS NA 2/3/2015 <0.1 NS NA 4/8/2015 <0.1 NS NA NS NA NS NA 8/11/2015 <0.1 NS NA NS NA 11/3/2015 <0.1 NS NA Field pH (S.U.)6.5 - 8.5 1/21/2015 6.49 6.44 3/5/2015 6.05 6.55 5/11/2015 6.30 6/1/2015 6.65 7/7/2015 6.57 6.37 9/16/2015 6.51 10/8/2015 6.45 6.52 12/8/2015 6.45 MW-25 (Class III) Field pH (S.U.)6.5 - 8.5 1/20/2015 6.19 2/4/2015 6.46 3/4/2015 6.32 4/7/2015 6.52 5/11/2015 6.46 6/1/2015 6/23/2015 6.59,6.53 7/6/2015 6.70 8/10/2015 6.47 9/15/2015 6.58 10/6/2015 6.45 11/11/2015 6.79 12/8/2015 6.41 Cadmium (ug/L)1.5 1.44 1.33 1.37 1.27 1.38 6/23/2015 1.42 1.43 1.41 1.31 1.5 1.38 1.45 Uranium (ug/L)6.5 6.54 6.81 6.43 5.86 6.38 5.88 6.25 6.39 6.20 6.40 6.19 6.00 MW-26 (Class III) Nitrate + Nitrite (as N) (mg/L)0.62 0.30 2/11/2015 2.68 3/4/2015 0.965 4/9/2015 0.845 5/12/2015 0.606 6/24/2015 0.588 7/7/2015 US 8/10/2015 8/17/2015 1.75 9/16/2015 0.795 2.36 ll/l 1/2015 1.11 1.200 Uranium (ug/L)41.8 1/21/2015 2.96 78.1 72.6 75.7 63.3 67.4 72.1 61.9 56.0 61.2 66.0 65.2 Chloroform (ug/L)70 3570 1190 1020 1520 1160 2610 2560 1240 2150 10/7/2015 2400 2660 3140 Chloride (mg/L)58.31 59.9 77.2 67.2 61.0 61.4 60.8 67.4 88.3 74.5 74.4 75.3 12/8/2015 66.0 Field pH (S.U.)6.74 - 8.5 6.25 6.20 6.23 6.60 6.46 6/3/2015 6/24/2015 6.58, 6.20 6.87 6.54 6.81 6.48 6.80 6.65 6.30 Methylene Chloride (ug/L)5 6.42 5.89 6.95 3.99 4.44 6/24/2015 9.38 11.4 2.17 <1.0 4.27 9.89 12.0 MW-30 (Class II) Nitrate + Nitrite (as N) (mg/L)2.5 1/21/2015 19.5 2/4/2015 14.9 3/3/2015 17.3 4/8/2015 17 5/12/2015 16.1 6/24/2015 15.8 7/7/2015 15.3 8/11/2015 17.9 9/15/2015 17J 10/7/2015 19.1 11/11/2015 16.3 18.2 Chloride (mg/L)128 144 136 132 142 145 142 145 165 165 137 140 144 Uranium (ug/L)8.32 8.06 8.23 8.35 7.45 8.38 7.46 7.98 8.16 7.72 8.10 7.99 8.22 Field pH (S.U.)6.5 - 8.5 6.41 6.59 6.32 6.67 6.76 6/2/2015 6/24/2015 6.94, 6.32 6.85 6.73 6.65 6.88 6.83 12/9/2015 6.79 Fluoride (mg/L)0.51 NA 0.324 NA 0.286 NA NA NA 0.247 NA NA 0.572 NA Selenium (ug/L)34 37.2 40.9 38.0 37.3 35.7 37.2 39.2 41.6 39.1 43.9 38.6 40.7 MW-31 (Class III) Nitrate + Nitrite (as N) (mg/L)5 1/20/2015 20.9 2/2/2015 18.7 3/3/2015 19.8 4/7/2015 19.0 5/11/2015 18.4 6/23/2015 18.0 7/6/2015 18.8 8/10/2015 19.9 18.9 10/6/2015 22.0 11/9/2015 18.4 19.5 TDS (mg/L)1320 1540 1520 1530 1680 17(Ml 1630 1440 1530 9/15/2015 1480 1540 1460 1580 Chloride (mg/L)143 226 2H 209 211 225 228 222 264 231 222 215 231 Selenium (ug/L)71 75.6 79.2 76.2 75.7 71.6 74.4 78.2 82.2 79.0 78.6 77.7 12/8/2015 80.4 Field pH (S.U.)6.5 - 8.5 6.49 6.42 6.40 6.80 6.74 6/1/2015 6/23/2015 6/23/2015 7.14,7.08 7.22 6.80 6.73 6.47 6.36 6.70 Uranium (ug/L)9.1 NS 8 NS 8.07 NS NS NS 8.76 NS NS 8.72 NS Sulfate (mg/L)532 669 623 616 642 668 691 684 640 638 655 646 690 MW-35 (Class II) Manganese (ug/L)200 1/20/2015 228 2/5/2015 223 3/4/2015 190 4/9/2015 237 5/12/2015 207.0 6/23/2015 214 7/7/2015 185 8/10/2015 198 201, 176 10/6/2015 169 11/3/2015 210 12/14/2015 177 Gross Alpha minus Rn & U (pCi/L)3.75 6.86 5.61 3.81 4.25 4.47 6/2/2015 4.01 4.93 3.24 4.81, 6.13 4.04 4.47 4.69 Field pH (S.U.)6.5 - 8.5 6.22 6.53 6.26 6.64 6.46 6/2/2015 6/23/2015 6.50, 6.41 6.56 6.40 9/15/15 9/22/15 9/28/15 6.52, 6.41, 6.49 6.29 6.72 6.57 Selenium (ug/L)12.5 8.21 14.2 26.6 <5.0 9.11 6/23/2015 13.6 26.1 12.5 16.7, 78.5 39.8 9.96 25.0 Uranium (ug/L)7.5 21.8 20.6 24.4 20.2 22.5 20.7 22.0 22.1 2U, 22.3 23.8 22.7 21.8 Required Semi-Annual Sampling Wells MW-OI (Class II) Chloride (mg/L)22.1 NA 2/10/2015 NA NA 23.9 NS NA NS NA NS NA 7/27/2015 NA NS NA NS NA 11/11/2015 21.9 NA Field pH (S.U.)6.77 - 8.5 NS NA 6.66 NS NA 4/15/2015 7.15 NA NA NA 7.12 NA NA 6.83 NS NA Sulfate (mg/L)838 NA 813 NA 892 NA NA NA 876 NA NA 830 NA MW-03A (Class III) Field pH (S.U.)6.5 - 8.5 NS NA 2/12/2015 6.15 NS NA 4/23/2015 4/29/2015 6.59, 6.24 NS NA NS NA NS NA 7/29/2015 6.34 NS NA NS NA 11/4/2015 6.63 NS NA Sulfate (mg/L)3640 NA 3450 NA 4/23/2015 3720 NA NA NA 3860 NA NA 3380 NA Selenium (ug/L)89 NA 94.1 NA 101 NA NA NA 85.9 NA NA 91.7 NA MW-05 (Class II)Field pH (S.U.)6.5 - 8.5 NS NA 2/10/2015 6.99 NS NA 4/21/2015 7 NS NA NS NA NS NA 7/21/2015 NS NA NS NA 11/4/2015 7.43 NS NA Uranium (ug/L)7.5 2.94 1.3 0.887 2.35 MW-12 (Class III) Selenium (ug/L)25 NS NA NA 30.0 NS NA 4/21/2015 29.4 NS NA NS NA NS NA 7/21/2015 24.6 NS NA NS NA 11/17/2015 24.7 NA Uranium (ug/L) 23.5 NA NA 4/21/2015 21.6 NA NA NA NA NA NA 23 NS NA Field pH (S.U.)6.5 - 8.5 NA 6.33 NA 4/21/2015 4/28/'?ni5 6.50. 6.70 NA NA NA 6.70 NA NA 6.65 NA MW-15 (Class III)Selenium (ug/L)128.7 M<{NA 2/4/2015 125 MC NA a] 1 '\nr\ i < 137 NS NA NS NA NS NA 104 ktc NA NS NA 107 NS NA Field pH (S.U.)6.62 - 8.5 NA 6.50 INO NA *1/1.5/ZUIJ 6.82 NA NA NA //ZZ/ZU 1J 6.61 NA NA 11/ lurZUl J 6.81 NA Q1 2015 Results Q2 2015 Results Q3 2015 Results Q4 20US Results Monitoring Wdl (Water Class) Constituent Exceeding GWCL GWCL in August 24, 2012 GWDP January 2015 Monthly Sample Date Jonuary 2015 Monthly Result Q1 2015 Sample Date Q1 2015 Result March 2015 Monthly Sample Date March 2015 .Monthly Result Q2 2015 Sample Date Q2 2015 Result May 2015 Monthly Sample Date May 2015 Monthly Result June 2015 Monthly Sample Date June 2015 .Monthly Result July 2015 Monthly Sample Date July 2015 Monthly Result Q3 2015 Sample Date Q3 2015 Result September 2015 Monthly Sample Date September 2015 Monthly Result October 2015 Monthly Sample Date October 2015 Monthly Result Q4 2015 Sample Date Q4 2015 Result December 2015 Monthly Sample Date December 2015 Monthly Result Required St mi-Annual Sanipling Wells, cuntinued MW-18 (Class III) Thallium (ug/1)1.95 NS NA 2/3/2015 2.89 NS NA 4/15/2015 2.81 NA NS NA NS NA 2.69 NA NS NA 2.68 NS NA Sulfate (mg/L)1938.9 NA 1810 NA 1790 NA NA NA 1990 NA NA 2000 NA Field pH (S.U.)6.25-8.5 NA 6.21 NA 6.40 NS NA NA NA 7/27/2015 6.43 NS NA NA 11/9/2015 6.30 NA TDS (mg/L)3198.77 NA 3240 NA 3350 NA NA NA 3190 NA NA 3000 NA MW-19 (Class IH)Field pH (S.U.)6.78-8.5 NS NA 2/2/2015 0.45 NS NA 4/14/2015 6.79 NS NA NS NA NS NA 7/27/2015 6.78 NS NA NS NA 11/10/2015 6.70 NS NA Nitrate + Nitrite (as N) (mg/L)2.83 NA 2.91 NA 3.58 NA NA NA 2.82 NA NA 2.23 NA MW-23 (Class HI)Field pH (S.U.) 6.5 8.5 NS NA 2/10/2015 6.53 NS NA 4/30/2015 6.80 NS NA NS NA NS NA 7/22/2015 6.53 NS NA NS NA 11/18/2015 6.77 NS NA MW-24 (Class III) Cadmium (ug/L)2.5 NS NA 2/12/2015 3.31 NS NA 1.79 NS NA NS NA NS NA 1.88 NA NS NA 3.75 NS NA Fluoride (mg/L)0.36 NA 0.397 NA 0.293 NA NA NA 0.388 NA NA 0.372 NA Sulfate (mg/L)2903 NA 2620 NA 2840 NA NA NA 7/29/2015 2880 NS NA NA 11/18/2015 2790 NA Thallium (ug/L)1 NA 1.27 NA 0.796 NA NA NA 0.85 NA NA 1.37 NA Field pH (S.U.)6.5 - 8.5 NA 6.21 NA 5/28/2015 6/24/2015 5.39, 5.98 NA NA NA 5.49 NA NA 5.48 NA MW-27 (Class III) Nitrate + Nitrite (as N) (mg/L)5.6 NA 2/9/2015 3.15 NS NA 4/20/2015 6.27 NS NA NS NA NS NA 7/21/2015 7.35 NS NA NS NA 11/10/2015 5.60 NS NA Chloride (mg/L)38 NS NA 44.2 NA 47.6 NA NA NA 43.7 NA NA 42.9 NA Field pH (S.U.)6.5 - 8.5 NA 6.82 NA 7.09 NA NA NA 6.84 NA NA 6.48 NA TDS (mg/L)1075 NA 996 NA 1040 NA NA NA 1010 NA NA 1000 NA MW-28 (Class HI) Chloride (mg/L)105 NS NA 2/9/2015 130 NS NA 4/21/2015 125 NS NA NS NA NS NA 113 NS NA NS NA 116 NS NA Cadmium (ug/L)5.2 NA 4.83 NA 4.59 NA NA NA 7/21/2015 4.97 NA NA 4.73 NA Uranium (ug/L)4.9 NA 4.48 NA 6.13 NA NA NA 4.87 NA NA 11/10/2015 4.84 NA Vanadium (ug/L)30 NA <15.0 NA <15.0 NA NA NA <15.0 NA NA <15.0 NA Field pH (S.U.)6.1 - 8.5 NA 5.86 NA 4/21/2015 4/27/2015 6.08, 6.17 NA NA NA 5.91 NA NA 6.22 NA TDS (mg/L)4400 NA 4430 NA 4190 NA NA NA 4310 NA NA 4110 NA MW-29 (Class III)Sulfate (mg/L)2946 NS NA 2/10/2015 NA NS NA 4/30/2015 2960 NS NA NS NA NS NA 7/22/2015 NA NS NA NS NA 11/16/2015 2740 NS NA Field pH (S.U.) 6.46 - 8.5 NA 6.42 NA 6.36 NA NA NA 6.30 NA NA 6.37 NA Chloride (mg/L) 35.39 NA 3/17/2015 NA 37.8 NA NA NA 37.3 NA NA 34.1 NA MW-32 (Class HI)Sulfate (mg/L)2556.70 NS NA NS NA NS NA 4/8/2015 2150 NS NA NS NA NS NA 7/23/2015 NA NS NA NS NA 11/3/2015 NA NS NA Field pH (S.U.)6.4 - 8.5 NA 2/9/2015 6.29 NA 6.37 NA NA NA 6.26 NA NA 6.41 NA Notes: GWCL values are taken from August 24. 2012 version of GWDP. NS = Not Required and Not Sampled NR = Required and Not Reported NA = Not Applicable Exceedances are shown in yellow Values in () parentheses are the field pH measurements for the resampled analyses. Table 1 - GWCL Exceedances for Third Quarter 2017 under the August 24, 2012 GWDP Q2 2016 Result, Monitoring Well (Water Class) Constituent Exceeding GWCL GWCL in August 24, 2012 GWDP January 2016 Monthly Sample Date January 2016 Monthly Result Q12016 Sample Date Q12016 Result March 2016 Monthly Sample Date March 2016 Monthly Result April 2016 Monthly Sample Date April 2016 Monthly Result Q2 2016 Sample Date Q2 2016 Result June 2016 Monthly Sample Date June 2016 Monthly Result July 2014 Monthly Sample Date July 2016 Monthly Result Q3 2016 Sample Date Q3 2016 Result September 2016 Monthly Sample Date September 2016 Monthly Result October 2016 Monthly Sample Date October 2016 Monthly Result Q4 2016 Sample Dale Q4 20I6 Result December 2016 Monthly Sample Date December 20 U Monthly Result Required Quarter!* Sampling Wefts MW-11 (Class H) Manganese (ug/L)131.29 1/20/2016 197 2/8/2016 217 3/3/2016 155 4/12/2016 166 5/3/2016 159 6/14/2016 158 7/13/2016 140 8/16/2016 158 9/14/2016 169 10/5/2016 160 11/7/2016 203 12/6/2016 202 Sulfate (rag/L)1309 NS NA 1160 NS NA NS NA 1200 NS NA NS NA 1160 NS NA NS NA 1290 NS NA MW-14 (Class lU) Fluoride (mg/L)0.2 NS NA 0.134 NS NA NS NA 5/4/2016 0.121 NS NA NS NA 8/17/2016 0.149 NS NA NS NA 11/2/2016 0.137 NS NA Field pH (S.U.)6.5 - 8.5 1/19/2016 6.27 2/15/2016 6.55 3/3/2016 6.66 4/13/2016 6.38 6.28 6/14/2016 6.24 7/13/2016 6.20 6.71 9/14/2016 6.4J 10/5/2016 6.69 6.59 12/6/2016 6.38 MW-25 (Class III) Field pH (S.U.)6.5 - 8.5 1/19/2016 6.18 2/8/2016 6.50 3/2/2016 6.57 4/12/2016 6.51 5/3/2016 6.24 6/14/2016 6.25 7/12/2016 6.23 8/17/2016 6.57 9/13/2016 6.21 10/4/2016 6.66 11/2/2016 6.65 12/5/2016 6.70 Cadmium (ug/L)1.5 1.37 LSI 1.42 1.39 1.43 1.43 1.44 1.37 1.41 1.41 1.33 1.41 Uranium (ug/L)6.5 6.54 6.16 6.22 6.03 6.30 5.99 6.64 6.33 6.48 6.36 6.48 6.70 MW-26 (Class III) Nitrate + Nitrite (as N) (rag/L)0.62 0.943 2/16/2016 1.66 3/2/2016 1.95 0.990 1.85 6/15/2016 1.66 7/14/2016 1.63 8/18/2016 2.70 9/15/2016 1.67 10/6/2016 1.11 11/9/2016 2.73 12/6/2016 1.80 Uranium (ug/L) 41.8 29.3 30.4 67.7 53.9 5/4/2016 39.7 52.7 45.4 34.2 31.7 32.2 30.2 34.9 Chloroform (ug/L)70 1/20/2016 2370 3530 2280 2060 1720 I860 3300 2950 3950 1660 2440 2970 Chloride (mg/L)58.31 63.5 69.1 76.8 4/13/2016 67.4 68.1 81.6 68.3 78.6 75.6 71.1 67.9 73.7 Field pH (S.U.)6.74 - 8.5 6.27 5.98 6.35 6.50 6.19 6.29 6.20 6.65 6.40 6.68 5.90 6.23 Methylene Chloride (ug/L)5 4.73 8.68 3.93 5.62 3.63 4.12 8.99 6.08 11.9 3.49 3.40 5.08 MW-30 (Class II) Nitrate + Nitrite (as N) (mg/L)2.5 1/20/2016 14.6 20.0 3/2/2016 17.8 18 5/4/2016 17.3 6/14/2016 18.5 16.1 8/18/2016 18.0 9/14/2016 17 10/5/2016 17.2 11/3/2016 18.0 18.2 Chloride (mg/L)128 143 145 142 144 139 142 137 150 146 148 143 158 Uranium (ug/L) 8.32 8.34 7.76 7.82 7.55 8.18 7.66 8.10 8.23 8.22 7.64 7.92 8.63 Field pH (S.U.) 6.5 - 8.5 6.45 2/10/2016 6.94 6.51 4/13/2016 6.84 6.30 6.28 7/13/2016 6.23 6.86 6.60 6.87 6.94 12/6/2016 6.34 Fluoride (mg/L)0.51 NA 0.360 <10.00 0.359 0.346 0.36 0.36 0.399 0.368 0.376 0.375 0.385 Selenium (ug/L)34 41.7 42.5 43.2 41.0 42.5 41.8 42.7 43.1 43.0 42.8 43.4 42.1 MW-31 (Class III) Nitrate + Nitrite (as N) (mg/L)5 18.9 2/15/2016 18.8 3/2/2016 18.0 22.8 5/3/2016 18.6 6/15/2016 19.2 17.4 8/16/2016 19.7 9/13/2016 18.6 10/4/2016 18.8 11/1/2016 19.8 18.5 TDS (mg/L)1320 1560 1490 1580 1710 1550 1580 1610 1710 1570 1670 1690 1670 Chloride (mg/L)143 228 246 228 4/12/2016 254 243 252 241 272 254 260 267 274 Selenium (ug/L)71 1/19/2016 85.1 81.0 85.7 81.6 84.6 83.3 7/12/2016 85.6 85.4 85.5 88.2 89.0 12/5/2016 87.1 Field pH (S.U.)6.5 - 8.5 7.04 7.21 6.83 6.93 6.48 7.01 6.49 6.92 6.35 6.99 6.92 6.79 Uranium (ug/L)9.1 NS 8.41 NS NS 9.05 NS NS 9.41 NS NS 9.56 10.3 Sulfate (mg/L) 532 675 631 654 715 699 748 712 766 703 720 752 748 MW-35 (Class II) Manganese (ug/L) 200 211 2/10/2016 194 3/2/2016 194 213 5/3/2016 203 6/15/2016 228 210 8/16/2016 204 9/13/2016 198 10/4/2016 196 11/9/2016 224 189 Gross Alpha minus Rn & U (pCi/L)3.75 6.95 2.42 3.88 3.65 3.22 5.39 3.64 2.56 3.68 2.65 3.33 2.80 Field pH (S.U.)6.5 - 8.5 1/19/2016 6.35 6.70 6.53 4/12/2016 6.51 6.22 6.20 7/12/2016 6.28 6.65 6.21 6.73 6.30 12/5/2016 6.50 Selenium (ug/L)12.5 8.62 14.4 20.2 9.2 12.9 6.18 8.60 16.80 18.50 14.0 10.50 21.90 Uranium (ug/L)7.5 21.1 20.8 21.8 19.9 21.2 19.4 21.5 22.2 22.0 21.0 22.0 24.0 MW-01 (Class II) Chloride (mg/L)22.1 NS NA 2/10/2016 22.1 NS NA NS NA ____________^ 4/20/2016 ; mml 3eini \n 22.0 NS Wdh NA NA 8/24/2016 21.5 NS NA NS NA 11/8/2016 23.7 NA Field pH (S.U.)6.77 - 8.5 NA 7.06 NA NA 6.36 NA NS NA 7.21 NA NA 6.54 NS NA Sulfate (mg/L) 838 NA 812 NA NA 825 NA NA 866 NA NA 720 NA MW-03A (Class III)Field pH (S.U.)6.5 - 8.5 NS NA 2/16/2016 7.08 NS NA NTC NA 4/27/2016 6.43 NS NA NS NA 9/22/2016 6.79 NS NA NS NA 11/8/2016 6.35 NS NA Sulfate (mg/L) 3640 NA 3580 NA IN 3 NA 3580 NA NA 3390 NA NA 3440 NA Selenium (ug/L)89 NA 91.5 NA NA 103 NA NA 75.7 NA NA 142 NA MW-05 (Class II)Field pH (S.U.)6.5 - 8.5 NS NA 2/15/2016 7.44 NS NA NS NA 4/21/2016 6.92 NS NA NS NA 8/19/2016 7.29 NS NA NS NA 11/9/2016 6.81 NS NA Uranium (ug/L)7.5 1.15 0.869 0.688 0.661 MW-12 (Class III) Selenium (ug/L)25 NA 2/4/2016 23.8 NS NA NA 4/21/2016 31.2 NS NA NA 8/19/2016 27.7 NS NA NS NA 11/8/2016 29.3 NS NA Uranium (ug/L) 23.5 NS NA NA NA NS NA 23.3 NA NS NA NA NA NA 22.6 NA Field pH (S.U.)6.5 - 8.5 NA 6.36 NA NA 6.31 NA NA 6.84 NA NA 6.43 NA MW-15 (Class III)Selenium (ug/L)128.7 XTC NA 2/4/2016 123 NS NA NS NA 4/27/2016 126 NS NA MC NA 8/18/2016 110 NS NA NS NA 11/3/2016 112 NS NA Field pH (S.U.)6.62 - 8.5 No NA 6.30 NA NA 6.02 NA 1X3 NA 6.71 NA 1X3 NA 6.68 NA 012016 Results Q2 2016 Results Q32016 Q4 2016 Monitoring WeH (Water Class) Constituent Excectting GWCL GWCL in August 24, 2012 GWDP January 2016 Monthly Sample Date January 2016 Monthly Result 01 2016 Sample Date Q1 2016 Result March 2016 Monthly Sample Date March 2016 Monthly Result April 2016 Monthly Sample Date April 2016 Monthly Result Q2 2016 Sample Date Q2 20I6 Result June 2016 Monthly Sample Date June 2016 Monthly Result July 2016 Monthly Sample Date July 2016 Monthly Result 03 2016 Sample Date 03 2016 Result September 2016 Monthly Result October 2016 Monthly Sample Date October 2016 Monthly Result Q4 2016 Sample Date Q4 20I6 Result December 2016 Monthly Sample Date December 2016 Monthly ResultMonthly Sample Date Required Semi-Annual!umpling \V«#s, continued MW-18 (Class III) Thallium (ug/1)1.95 NS NA 2/9/2016 2.67 NS NA NA 2.77 NA NS NA 8/23/2016 2.58 NA NA 2.73 NA Sulfate (mg/L)1938.9 NA 1890 NA NS NA 1890 NA NA I960 NA NA 1780 NA Field pH (S.U.) 6.25-8.5 NA 6.10 NA NA 4/19/2016 5.93 NS NA NA 6.64 NS NA NS NA 11/2/2016 6.55 NS NA TDS (mg/L)3198.77 NA 3130 NA NA 3190 NA NA 3180 NA NA 3140 NA MW-19 (Class III)Field pH (S.U.)6.78-8.5 NS NA 2/9/2016 6.76 NS NA NS NA 6.25 NS NA NS NA 8/23/2016 7.07 NS NA NS NA 11/7/2016 6.47 NS NA Nitrate + Nitrite (as N) (mg/L)2.83 NA 2.44 NA NA 2.63 NA NA 2.62 NA NA 2.68 NA MW-23 (Class III)Field pH (S.U.)6.5 - 8.5 NS NA NS NA NS NA NS NA 5/18/2016 6.59 NS NA NS NA NS NA NS NA NS NA 11/16/2016 6.26 NS NA MW-24 (Class III) Cadmium (ug/L)2.5 NA 2/17/2016 6.31 NA NS NA 6.07 NA NS NA 3.97 NA NS NA 11/2/2016 3.67 NA Fluoride (mg/L)0.36 NA 0.117 NA NA 4/28/2016 0.446 NA NA 9/22/2016 0.135 NA NA 0.345 NA Sulfate (mg/L)2903 NS NA 2750 NS NA NA 2760 NS NA NA 2460 NS NA NA 2490 NS NA Thallium (ug/L)1 NA 2.04 NA NA 2.10 NA NA 1.57 NA NA 1.46 NA Field pH (S.U.)6.5 - 8.5 NA 5.95 NA NA 4.83 NA NA 6.00 NA NA 5.48 NA MW-27 (Class III) Nitrate + Nitrite (as N) (mg/L)5.6 NS NA 2/2/2016 6.50 NS NA NS NA 7.40 NA NS NA 6.46 NA NS NA 11/1/2016 6.89 NS NA Chloride (mg/L)38 NA 47.3 NA NA 4/20/2016 43.1 NS NA NA 8/24/2016 42.3 NS NA NA 43.2 NA Field pH (S.U.)6.5 - 8.5 NA 6.59 NA NA 6.54 NA NA 7.36 NA NA 6.93 NA TDS (mg/L)1075 NA 1050 NA NA 1020 NA NA 960 NA NA 908 NA MW-28 (Class IID Chloride (mg/L)105 NA 2/2/2016 130 NS NA NA 121 NS NA NS NA 127 NA NS NA 11/1/2016 126 NA Cadmium (ug/L)5.2 NS NA 5.26 NA NA 4.90 NA NA 5.14 NA NA 4.84 NA Uranium (ug/L)4.9 NA 4.61 NA NS NA 4/20/2016 3.95 NA NA 9/1/2016 4.71 NS NA NA 4.09 NS NA Vanadium (ug/L)30 NA <15.0 NA NA <15.0 NA NA <15.0 NA NA <15.0 NA Field pH (S.U.)6.1 - 8.5 NA 5.46 NA NA 5.73 NA NA 6.56 NA NA 6.21 NA MW-29 (Class III) TDS (mg/L)4400 NA 2/10/2016 4410 NS NA NA 4100 NS NA NS NA 9/1/2016 4410 NA NS NA 11/8/2016 4090 NS NA Sulfate (mg/L)2946 NS NA 2710 NA NS NA 4/27/2016 2730 NA NA 2750 NS NA NA 2290 NA Field pH (S.U.) 6.46 - 8.5 NA 6.47 NA NA 6.03 NA NA 6.78 NA NA 6.35 NA Chloride (mg/L) 35.39 NA 38.2 NA NA 36.3 NA NA 38.3 NA NA 39.1 NA MW-32 (Class IU)Sulfate (mg/L)2556.70 NS NA 2/3/2016 NA NS NA NS NA 4/20/2016 2220 NS NA NS NA 8/17/2016 NA NS NA NS NA 10/31/2016 2590 NS NA Field pH (S.U.)6.4 - 8.5 NA 5.99 NA NA 6.06 NA NA 6.29 NA NA 6.38 NA Notes: GWCL values are taken from August 24, 2012 version of GWDP. NS = Not Required and Not Sampled NR = Required and Not Reported NA = Not Applicable Exceedances are shown in yellow Values in () parentheses are the field pH measurements for the resampled analyses. Q1 2017 Q2 1017 Q3 2017 Monitoring Well (Water Class) Constituent Exceeding GWCL GWCL in August 24. 2012 GWDP January 2017 Monthly Sample Date January 2017 Monthly Result Q1 2017 Sample Date Q1 2017 Result March 2017 Monthly Sample Date March 2017 Monthly Result April 2017 Monthly Sample Date April 2017 Monthly Result Q2 2017 Sample Date Q2 2017 Result June 2017 Monthly Sample Date June 2017 Monthly Result July 2017 Monthly Sample Date July 2017 Monthly Result Q3 2017 Sample Date Q3 2017 Result Sept 2017 Monthly Sample Date Sept. 2017 Monthly Result Sample Frequency Required Quarterly Samplling Wells MW-11 (Class II)Manganese (ug/L)131.29 1/18/2017 152 2/8/2017 162 3/6/2017 144 4/5/2017 155 5/2/2017 174 6/5/2017 168 7/12/2017 154 8/15/2017 191 9/12/2017 !217 Quarterly Sulfate (mg/L)1309 NS NA 1050 NS NA NS NA 1140 NS NA NS NA 1360 NS NA Quarterly MW-14 (Class III) Fluoride (mg/L)0.2 NS NA 0.115 NS NA NS NA 5/1/2017 0.22 NS NA NS NA 8/15/2017 0.120 9/12/2017 0.137 Quarterly Field pH (S.U.)6.5 - 8.5 1/18/2017 6.36 2/2/2017 6.34 in non 6.35 4/5/2017 6.28 6.75 6/6/2017 6.40 7/11/2017 6.61 6.19 6.46 Quarterly MW-25 (Class HI) Field pH (S.U.)6.5 - 8.5 1/17/2017 6.40 2/7/2017 6.34 in non 6.62 4/4/2017 6.02 5/1/2017 6.50 6/6/2017 6.64 7/12/2017 6.76 8/14/2017 6.20 9/11/2017 6.21 Quarterly Cadmium (ug/L)1.5 1.42 1.45 1.46 1.58 1.35 1.32 1.42 1.33 1.51 Quarterly Uranium (ug/L)6.5 6.54 6.60 6.39 6.65 6.27 6.12 6.66 6.31 6.12 Quarterly MW-26 (Class IH) Nitrate + Nitrite (as N) (mg/L)0.62 1/19/2017 0.875 0.662 1.72 4/5/2017 1.12 5/3/2017 1.27 1.74 1.04 8/16/2017 0.825 0.905 Quarterly Uranium (ug/L)41.8 59.0 61.9 30.9 56.3 50.8 37.9 33.5 41.3 45.4 Quarterly Chloroform (ug/L)70 1380 1740 in non 2030 1980 2340 3790 2440 1130 9/12/2017 1310 Quarterly Chloride (mg/L)58.31 60.7 2/9/2017 57.1 61.7 59.1 65.7 6/8/2017 70.3 7/13/2017 63.5 65.8 56.4 Quarterly Field pH (S.U.)6.74 - 8.5 6.67 6.42 6.06 6.01 6.53 6.81 6.73 6.52 7.28 Quarterly Methylene Chloride (ug/L)5 3.65 4.12 9.46 7.22 11.2 22.7 15.4 1.62 2.55 Quarterly MW-30 (Class U) Nitrate + Nitrite (as N) (mg/L)2.5 19.0 17.4 18.1 4/5/2017 18.3 5/2/2017 17.5 18.8 16.2 8/14/2017 19.2 18.7 Quarterly Chloride (mg/L)128 150 150 147 146 146 153 160 173 149 Quarterly Uranium (ug/L)8.32 8.01 7.62 7.89 7.63 8.11 7.98 8.33 8.05 7.80 Quarterly Field pH (S.U.)6.5 - 8.5 1/18/2017 6.61 2/2/2017 6.40 in non 6.68 5.99 6.77 6/5/2017 6.87 7/11/2017 7.04 6.32 9/12/2017 7.35 Quarterly Fluoride (mg/L)0.51 0.373 0.374 0.351 0.345 0.362 0.340 0.346 0.355 NA Quarterly Selenium (ug/L)34 43.0 40.0 40.8 43.9 43.3 42.8 43.3 44.5 45.5 Quarterly MW-31 (Class III) Nitrate + Nitrite (as N) (mg/L)5 1/17/2017 20.9 21.1 20.4 4/4/2017 19.5 5/1/2017 18.3 20.8 18.0 19.5 20.2 Quarterly TDS (mg/L)1320 1730 1680 1690 166(1 1820 1710 1830 1780 1780 Quarterly Chloride (mg/L)143 287 266 250 263 263 278 254 310 248 Quarterly Selenium (ug/L)71 82.7 89.4 3/6/2017 82.9 88.0 85.2 6/5/2017 85.7 7/11/2017 84.5 8/14/2017 87.4 9/11/2017 90.3 Quarterly Field pH (S.U.)6.5 - 8.5 6.75 6.30 6.39 6.26 6.87 6.90 6.94 6.29 6.32 Quarterly Uranium (ug/L)9.1 9.03 9.92 9.62 10.10 9.62 9.89 10.5 10.1 9.74 Quarterly Sulfate (mg/L)532 809 751 741 758 741 808 747 916 762 Quarterly MW-35 (Class II) Manganese (ug/L)200 216 189 201 4/5/2017 211 5/1/2017 210 207 216 8/15/2017 197 189 Quarterly Gross Alpha minus Rn & U (pCi/L)3.75 3.81 3.19 4.13 4.34 3.36 4.31 5.23 4.02 4.15 Quarterly Field pH (S.U.)6.5 - 8.5 1/18/2017 6.39 6.28 3/6/2017 6.36 6.33 6.68 6/5/2017 6.51 7/12/2017 6.85 6.21 9/11/2017 6.43 Quarterly Selenium (ug/L)12.5 8.93 19.30 8.09 13.40 8.58 7.47 13.1 14.1 9.28 Quarterly Uranium (ug/L)7.5 21.2 21.1 20.7 22.9 20.8 22.8 23.2 20.8 20.1 Quarterly Required Semi-Annual Sainpling Wells MW-01 (Class II) Chloride (mg/L)22.1 NA 1/31/2017 22.8 NA NS NA 4/19/2017 22.4 NS NA NA 21.9 NA Semi-Annually Field pH (S.U.)6.77 - 8.5 NS NA 6.60 NS NA NA 6.76 NA NS NA 8/11/2017 6.61 NS NA Semi-Annually Sulfate (mg/L)838 NA 799 NA NA 856 NA NA 937 NA Semi-Annually MW-03A (Class III)Field pH (S.U.)6.5 - 8.5 NIC NA 7/0/9017 6.50 NS NA NS NA 4/26/2017 6.56 NS NA NS NA 8/17/2017 6.10 NS NA Semi-Annually Sulfate (mg/L)3640 1NO NA 2800 iso NA NA 3450 NA NA 3740 NA Semi-Annually Selenium (ug/L)89 NA 85.2 NA NA 93.9 NA NA 111 NA Semi-Annually MW-05 (Class II)Field pH (S.U.) 6.50 MS NA 1/25/2017 6.46 NS NA NS NA 4/25/2017 6.98 NS NA NS NA 8/9/2017 7.09 NS NA Semi-Annually Uranium (ug/L)7.5 I'lo 145 iso 15.2 2.46 [NA Semi-Annually MW-12 (Class III) Selenium (ug/L)25 NA 1/25/2017 , 34.6 NS NA NS NA 4/26/2017 37.0 NA NA 8/10/2017 27.3 NA Semi-Annually Uranium (ug/L)23.5 NS NA NA NA NA 23.7 NS NA NS NA 22.5 NS NA Semi-Annually Field pH (S.U.)6.5 - 8.5 NA 6.71 NA NA 6.33 NA NA 6.42 NA Semi-Annually MW-15 (Class HI)Selenium (ug/L)128.7 NS NA 1/24/2017 112 NS NA NS NA 4/26/2017 111 NS NA NS NA 8/1 |/9ni7 105 NS NA Semi-Annually Field pH (S.U.) 6.62 - 8.5 NA 6.67 iso NA NA 6.48 NA iso NA 0/ 1 l/ZV 1 /6.26 INo NA Semi-Annually Q1 2017 Q2 2017 Q3 2017 Monitoring Well (Water Class) Constituent Exceeding GWCL in August 24, 2012 January 2017 Monthly Sample Date January 2017 Monthly Result Q1 2017 Sample Date Q1 2017 Result March 2017 Monthly Sample Date March 2017 Monthly Result April 2017 Monthly Sample Date April 2017 Monthly Result Q2 2017 Sample Date Q2 2017 Result June 2017 Monthly Sample Date June 2017 Monthly Result July 2017 Monthly Sample Date July 2017 Monthly Result Q3 2017 Sample Date Q3 2017 Result Sept. 2017 Monthly Sample Date Sept. 2017 Monthly Result Sample Frequency Required Semi-Annual Sampling WeHs. continued MW-18 (Class III) Thallium (ug/1)1.95 NA 2.41 NA NS NA 2.61 NA NA 2.38 NS NA Semi-Annually Sulfate (mg/L)1938.9 NA 1750 NA NA 1870 NA NA 1830 NA Semi-Annually Field pH (S.U.)6.25-8.5 NS NA 2/1/2017 6.30 NS NA NA 4/18/2017 6.13 NS NA NS NA 8/10/2017 6.41 NA Semi-Annually TDS (mg/L)3198.77 NA 3060 NA NA 2910 NA NA 2850 NA Semi-Annually MW-19 (Class HI)Field pH (S.U.)6.78-8.5 NS NA 1/31/2017 6.50 NS NA NS NA 4/18/2017 6.86 NS NA NS NA 8/9/2017 6.66 NS NA Semi-Annually Nitrate + Nitrite (as N) (mg/L)2.83 NA 2.77 NA NA 2.61 NA NA 2.45 NA Semi-Annually MW-23 (Class III)Field pH (S.U.)6.5 - 8.5 NS NA 1/31/2017 6.45 NS NA NS NA 5/3/2017 5.81 NS NA NS NA 8/11/2017 6.30 NS NA Semi-Annually MW-24 (Class III) Cadmium (ug/L)2.5 NS NA 2.18 NS NA NA 5/3/2017 2.56 NA NA 8/17/2017 6.95 NA Semi-Annually Fluoride (mg/L)0.36 NA 0.189 NA NA 0.347 NA NA 0.255 NA Semi-Annually Sulfate (mg/L)2903 NA 3/8/2017 2470 NA NS NA 2700 NS NA NS NA NA NS NA Semi-Annually Thallium (ug/L)1 NA 1.04 NA NA 1.18 NA NA 2.40 NA Semi-Annually Field pH (S.U.)6.5 - 8.5 NA 4.96 NA NA 5.40 NA NA 5.77 NA Semi-Annually MW-27 (Class III) Nitrate + Nitrite (as N) (mg/L)5.6 NA 7.24 NS NA NS NA 7.38 NA NA 8/9/2017 6.03 NS NA Semi-Annually Chloride (mg/L)38 NS NA 1/24/2017 4!.l NA NA 4/19/2017 38.2 NS NA NS NA 36.3 NA Semi-Annually Field pH (S.U.)6.5 - 8.5 NA 6.85 NA NA 6.82 NA NA 6.65 NA Semi-Annually TDS (mg/L)1075 NA 928 NA NA 776 NA NA NA NA Semi-Annually MW-28 (Class III) Chloride (mg/L)105 NA 131 NA NS NA 120 NA NA 8/22/2017 125 NS NA Semi-Annually Cadmium (ug/L)5.2 NA 5.23 NA NA 5.10 NA NA 4.95 NA Semi-Annually Uranium (ug/L)4.9 NS NA 1/25/2017 5.68 NS NA NA 4/19/2017 4.68 NS NA NS NA 5.68 NA Semi-Annually Vanadium (ug/L)30 NA <15 NA NA <15 NA NA NA NA Semi-Annually Field pH (S.U.)6.1 - 8.5 NA 6.17 NA NA 6.40 NA NA 6.21 NA Semi-Annually MW-29 (Class III) TDS (mg/L)4400 NA 4200 NA NA 4560 NA NA 8/15/2017 3960 NS NA Semi-Annually Sulfate (mg/L)2946 NS NA 1/26/2017 2670 NS NA NS NA 4/20/2017 2490 NS NA NS NA 2780 NA Semi-Annually Field pH (S.U.)6.46 - 8.5 NA 6.90 NA NA 6.10 NA NA 6.01 NA Semi-Annually MW-32 (Class III) Chloride (mg/L)35.39 NA 31.9 NA NA 37.6 NA NA 8/4/2017 36.9 NS NA Semi-Annually Sulfate (mg/L)2556.70 NS NA 2/1/2017 2090 NS NA NS NA 4/19/2017 2100 NS NA NS NA 2140 NA Semi-Annually Field pH (S.U.) 6.4 - 8.5 NA 6.19 NA NA 6.04 NA NA 6.05 NA Semi-Annually Notes: GWCL values are taken from August 24. 2012 version of GWDP. NS = Not Required and Not Sampled NR = Required and Not Reported NA = Not Applicable Exceedances are shown in yellow Values in () parentheses are the field pH measurements for the resampled analyses. Pursuant to the DWMRC letters of January 20, 2017 and July 12, 2017, these constituents will no longer be monitored on an accelerated schedule These constituents will be dropped from this report after this quarter.