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Home My WebLink AboutDRC-2016-009182 - 0901a0688065a3caEnergy Fuels Resources (USA) Inc. 225 Union Blvd. Suite 600 Lakewood, CO, US, 80228 303 974 2140 www.energyfuels.com August 5, 2016 VIA PDF AND OVERNIGHT DELIVERY Scott Anderson, 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 second quarter (“Q2”) groundwater monitoring during the period from April 1, to June 30, 2016 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 July 15, 2016. 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 Q2 2016 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: 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 Div of Waste Management and Radiation Control AUG - S 2016 D RC-2.01 G -oo^ 182. + 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. EFRPs 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 EFRPs 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 Letter to Mr. Scott Anderson August 5, 2016 Page 2 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 Q2 2016. A 30-day plan and schedule contemplated in Part I.G.l c) of the GWDP will not be required for the consecutive exceedances below for the reasons stated below. One-time exceedances and non-successive exceedances are noted on Table 1, but not listed below. Consecutive exceedances which occurred in previous reporting periods are discussed in the SARs submitted 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. MW-11 Letter to Mr. Scott Anderson August 5, 2016 Page 3 • Manganese concentrations exceeded the GWCL in MW-11 in all of the Q2 2016 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 • Field pH has been slightly outside (slightly lower than) the GWCL in all of the Q2 2016 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 Q2 2016 and June 2016 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 Letter to Mr. Scott Anderson August 5, 2016 Page 4 • Nitrate + nitrite has exceeded its GWCL in all of the Q1 2016 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 uranium concentration exceeded its GWCL in the March and April monthly sampling events. This consecutive exceedance is addressed in the SAR, dated October 10, 2012. As a result of the SAR, the GWCLs have been recalculated and accepted by 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. • Chloroform has exceeded its GWCL for all of the Q2 2016 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. 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, “fi]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 all of the Q2 2016 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 all of the Q2 2016 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 August 5, 2016 Page 5 • Nitrate + nitrite has exceeded its GWCL in all of the Q2 2016 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 Q2 2016 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. • Field pH has been slightly outside (slightly lower than) the GWCL in the Q2 2016 and June 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. • The selenium concentration exceeded its GWCL in all of the Q2 2016 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 • Nitrate + nitrite has exceeded its GWCL in all of the Q2 2016 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 Q2 2016. 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 Q2 2016 sampling events. This consecutive exceedance is addressed in the revised SAR, dated December 9, 2015 and approved by DWMRC on February 9, 2016. 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. • The selenium concentration exceeded its GWCL in all of the Q2 2016 sampling events. This consecutive exceedance is addressed in the revised SAR, dated December 9, 2015 and approved by DWMRC on February 9, 2016. 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. • The Total Dissolved Solids (“TDS”) exceeded its GWCL in all of the Q2 2016 sampling events. This consecutive exceedance is addressed in the revised SAR, dated December 9, 2015 and approved by DWMRC on February 9, 2016. 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-35 Letter to Mr. Scott Anderson August 5, 2016 Page 6 • The uranium concentration exceeded the GWCL in MW-35 in all of the Q2 2016 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 Q2 2016 and June 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 manganese concentration exceeded the GWCL in MW-35 in all of the Q2 2016 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. 1.2 Quarterly Wells with New Exceedances Reported in Q2 No new exceedances for the quarterly wells were noted during Q2 2016. 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 (Q1 2016 and Q2 2016). MW-3 • Fluoride has exceeded the GWCL the both the Q1 2016 sampling event and the Q2 2016 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. • Field pH has been slightly outside (slightly lower than) the GWCL for both the Q1 2016 sampling event and the Q2 2016 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 9, 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. • Zinc has exceeded the GWCL for both the Q1 2016 sampling event and the Q2 2016 sampling event. This consecutive exceedance is addressed in the Plan and Time Schedule which was submitted to DWMRC on September 10, 2015 and approved by DWMRC on November 10, 2015. Therefore, a plan and schedule for assessment will not be submitted under separate cover within 30 days of this Exceedance Notice. Letter to Mr. Scott Anderson August 5, 2016 Page 7 MW-3A Letter to Mr. Scott Anderson August 5, 2016 Page 8 • Selenium has exceeded the GWCL for both the Q1 2016 sampling event and the Q2 2016 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 • Field pH has been slightly outside (slightly lower than) the GWCL for both the Q1 2016 sampling event and the Q2 2016 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 • Field pH has been slightly outside (slightly lower than) the GWCL for both the Q1 2016 sampling event and the Q2 2016 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 Q1 2016 sampling event and the Q2 2016 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. • Field pH has been slightly outside (slightly lower than) the GWCL for both the Q1 2016 sampling event and the Q2 2016 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 Letter to Mr. Scott Anderson August 5, 2016 Page 9 current Mill activities...” and has recommended the removal of GWCLs for MW-18 from the next revision of the GWDP. A plan and schedule is not necessary because the exceedance is not caused by Mill activities and was previously discussed in the October 10, 2012 SAR. Until such time as the GWCLs are removed, the exceedances will continue to be noted and reported. MW-19 • Field pH has been slightly outside (slightly lower than) the GWCL for both the Q1 2016 sampling event and the Q2 2016 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-24 • Cadmium has exceeded the GWCL for both the Q1 2016 sampling event and the Q2 2016 sampling event. This consecutive exceedance is addressed in the SAR, dated October 10, 2012 and the Plan and Time Schedule which was submitted to DWMRC on March 3, 2016 and approved by DWMRC on April 4, 2016. A SAR was submitted on June 24, 2016. Therefore, a plan and schedule for assessment will not be submitted under separate cover within 30 days of this Exceedance Notice. • Thallium has exceeded the GWCL for both the Q1 2016 sampling event and the Q2 2016 sampling event. This consecutive exceedance is addressed in the SAR, dated October 10, 2012 and the Plan and Time Schedule which was submitted to DWMRC on March 3, 2016 and approved by DWMRC on April 4, 2016. A SAR was submitted on June 24, 2016. Therefore, a plan and schedule for assessment will not be submitted under separate cover within 30 days of this Exceedance Notice. • Field pH has been slightly outside (slightly lower than) the GWCL for both the Q1 2016 sampling event and the Q2 2016 sampling event. This consecutive exceedance is addressed in the SAR, dated October 10, 2012 and the Plan and Time Schedule which was submitted to DWMRC on March 3, 2016 and approved by DWMRC on April 4, 2016. A SAR was submitted on June 24, 2016. Therefore, a plan and schedule for assessment will not be submitted under separate cover within 30 days of this Exceedance Notice. MW-27 • The chloride concentration exceeded its GWCL for both the Q1 2016 sampling event and the Q2 2016 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 nitrate+nitrite concentration exceeded its GWCL for both the Q1 2016 sampling event and the Q2 2016 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 Letter to Mr. Scott Anderson August 5, 2016 Page 10 • Chloride has exceeded the GWCL for both the Q1 2016 sampling event and the Q2 2016 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. • Field pH has been slightly outside (slightly lower than) the GWCL for both the Q1 2016 sampling event and the Q2 2016 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-32 • Field pH has been slightly outside (slightly lower than) the GWCL for both the Q1 2016 sampling event and the Q2 2016 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 Q1 2016 sampling event and the Q2 2016 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 Q2 New single exceedances for the Q2 2016 semi-annual well sampling program are listed below. These exceedances will result in an accelerated sampling frequency from semi-annually to quarterly. It is important to note that the wells listed below will only be sampled during the first and third quarterly events for the constituent which exceeded the GWCL. The wells listed below will be sampled for all constituents listed in the GWDP during the second and fourth quarterly events as that is the regularly scheduled sampling for the semi-annual wells. • Manganese in MW-3 was above the GWCL in the Q2 sampling event. • Tetrahydrofuran (“THF”) in MW-3 was above the GWCL in the Q2 sampling event. Letter to Mr. Scott Anderson August 5, 2016 Page 11 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. Yours truly, ENERGY FUELS RESOURCES (USA) INC. Kathy Weinel Quality Assurance Manager cc:David Frydenlund Harold Roberts David Turk Logan Shumway Scott Bakken Table 1 - GWCL Exceedances for Second Quarter 2016 under the August 24, 2012 GWDP Q1 2010 Results Q2 2010 Results Q3 2010 Re ults Q4 2010 Results Monitoring Well (Water Class)Constituent Exceeding GWCL GWCL in August 24, 2012 GWDP Q1 2010 Sample Date Q1 2010 Result Q2 2010 Sample Date Q2 2010 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 August 2010 Monthly Result Q3 2010 Sample Date Q3 2010 Result October 2010 Monthly Sample Date October 2010 Monthly Result Q4 2010 Sample Date Q4 2010 Result December 2010 Monthly Sample Date December 2010 Monthly Result Required Quarterly Sampling WellIs MW-11 (Class 11)Manganese (ug/L)131.29 2/10/2010 134 4/28/2010 137 5/24/2010 122 6/16/2010 99 7/20/2010 123 8/25/2010 138 9/8/2010 128 10/20/2010 141 ll/l 1/2010 133 12/15/10 158 MW-14 (Class III)Field pH (S.U.)6.5 - 8.5 2/2/2010 6.45 4/21/2010 6.29 5/21/2010 6.36 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 7.2 NS NA NA NS NA NS NA 6.58 NA 11/10/2010 6.36 NS NA Chloride (mg/L)35 31 31 NA NS NA NA NA 9/8/2010 31 NS NA 31 NA Cadmium (ug/L)1.5 1.26 1.44 NA NA NA NA 1.4 NA 1.26 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/I.)0.62 2/2/2010 1.3 4/22/2010 2 5/21/2010 0.3 0.4 0.6 8/16/2010 0.6 0.7 0.4 11/15/2010 0.2 12/15/2010 0.4 Uranium (ug/L)41.8 58.7 66.7 37.4 36.6 34.4 71.8 72.7 37.5 30.4 29.6 Chloroform (ug/L)70 700 1700 800 940 900 2800 9/26/2010 2100 1000 1900 1400 Chloride (mg/L)58.31 72 57 80 6/16/2010 47 7/21/2010 52 49 64 10/20/2010 52 48 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 4/27/2010 15.8 5/21/2010 17 15.3 7/21/2010 16 8/24/2010 16 15 15 15 12/14/2010 16 Chloride (mg/L)128 127 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 9/21/2010 7.10 NA 6.64 NA Field pH (S.U.)6.5 - 8.5 6.81 6.55 6.62 6/15/2010 7.47 7/21/2010 7/27/2010 6.80 (6.82) 8/24/2010 6.73 6.80 (6.84) 10/19/2010 6.77 11/9/2010 6.75 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 2/9/2010 21.7 4/20/2010 22.5 5/21/2010 23 6/15/2010 21.1 7/21/2010 20 8/24/2010 22 21 10/19/2010 20 20 12/14/2010 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 139 NS NA 138 NS Selenium (ug/L)71 60.8 59.6 NS NA NS NA NS NA NS NA (9/21/10)64.4 NS NA 11/9/2010 60 NS Field pH (S.U.)6.5 - 8.5 6.%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 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 NS NA NS NA NS NA NS NA NS NA NS NA NA NA 698 NS NA Thallium (ug/1)0.5 NA NA NA NA NA NA NA NA 1.14 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.)6.5 - 8.5 NA NA NA NA NA NA NS NA NS NA 11/30/2010 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-Anilual Sampling Wells MW-01 (Class II) Chloride (mg/L)22.1 NS NA 5/5/2010 18 NS NA NS NA NA NS NA NA NA 15 NS NA Field pH (S.U.)6.77 - 8.5 NA 7.86 (6.87)NA NA NS NA NA NS NA NS NA 11/8/2010 6.%NA Sulfate (mg/L)838 NA 805 NA NA NA NA NA NA 792 NA MW-03 (Class III) Selenium (ug/L)37 NS NA 5/3/2010 37.2 NS NA NS NA NA NS NA 35.5 NS NA 38.8 NS NA Field pH (S.U.)6.5 - 8.5 NA 6.14(6.25)NA NA NA NA 6.39 NA 11/19/2010 6.35 NA Beryllium (ug/L)2 NA <0.5 NA NA NA NA NA NA <0.5 NA Cadmium (ug/L)4.67 NA 0.78 NA NA NA NA NA NA 0.63 NA Zinc (ug/L)173.19 NA 96 NA NA XTC NA NA NA NA 40 NA Thallium (ug/1) 1.6 NA 1.31 NA NA NA NA y/zU/zUlU NA NA 1.34 NA Sulfate (mg/L)3663 NA 3490 NA NA NA NA NA NA 3430 NA Nitrate + Nitrite (as N) (mg/L)0.73 NA 0.3 NA NA NA NA NA NA 0.4 NA Tetrahydrofuran (ug/L)23 NA 1 NA NA NA NA NA NA 1 NA Manganese (ug/L)4233 NA 168 NA NA NA NA NA NA 143 NA Fluoride (Mg/L)0.68 NA 0.71 NA NA NA NA 0.63 NA 0.77 NA MW-3A (Class III)Field pH (S.U.)6.5 - 8.5 NS NA 5/4/2010 6.23 (6.24) NS NA MC NA NA NS NA 9/21/2010 6.42 NS NA 11/22/2010 6.21 NS NA Sulfate (mg/L)3640 NA 3680 NA NA NA NA 3630 NA 3850 NA Selenium (ug/L)89 NA 81.4 NA NA NA NA NS NA 94.8 NA MW-05 (Class II)Uranium (ug/L)7.5 NS NA 4/26/2010 0.39 NS NA NS NA NS NA NS NA NS NA NS NA 11/11/2010 11.6 NS NA MW l?fr'laseITn Selenium (ug/L)25 NS NA 4/27/2010 25.7 NS NA NS NA NS NA NS NA 31.9 NS NA 11/19/2010 27.6 NS NA .vl W- 1Z i\„iaSS 111)Field pH (S.U.) 6.5 - 8.5 NS NA 7.16 NA NA NA NA y/zU/zU LU 6.62 NA 6.47 NA MW-1 s fCia'j'j nn Selenium (ug/L)128.7 NS NA 4/21/2010 100 NS NA NS NA xic NA NS NA MC NA NS NA 11/11/2010 99.5 NS NA\l_laSS 111)Field pH (S.U.)6.62 - 8.5 NA 6.98 NA NA INC)NA NA INC)NA NA 6.57 NA Q12010 Results 02 2010 Results 03 2010 Re;iUltS 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 Monthly 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 Sampling Wells, aontinued Thallium (ug/1)1.95 NA 3.73 NA NA NA NA 3.64 NA 3.57 NA MW-18 (Class III)Sulfate (mg/L)1938.9 NA 1950 NA NA NA NA 1930 NA 1910 NA Field pH (S.U.)6.25-8.5 NS NA 5/4/2010 6.2 NS NA NS NA NS NA NS NA 9/15/2010 7.23 NS NA 11/18/2010 6.37 NS NA TDS (mg/L)3198.77 NA 3280 NA NA NA NA 3190 NA 3030 NA MW-19 (Class III)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) (mg/L) 2.83 NA 2.6 NA NA NA NA NA NA 2.4 NA Cadmium (ug/L)2.5 NA 4.28 NA NA NA NA 5.06 NA 3.22 NA Fluoride (mg/L)0.36 NA 0.14 NA NA NA NA NA NA 0.18 NA MW-24 (Class HI)Sulfate (mg/L) 2903 NS NA 5/6/2010 2560 NS NA NS NA NS NA NS NA 9/21/2010 NA NS NA 11/17/2010 2760 NS NA Thallium (ug/L)1 NA 1.3 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 Nitrate + Nitrite (as N) (mg/L)5.6 NA 5.8 NA NA NA NA 5.9 NA 5.7 NA Chloride (mg/L)38 NA 42 NA NA NA NA 42 NA 45 NA MW-27 (Class III)Sulfate (mg/L) 462 VIC NA 469 VTC NA wc NA VIC NA VIC NA o/i /(/•in i a 461 VTC NA ii/i 'i/'im n 452 NA Field pH (S.U.)6.5 - 8.5 NA 6.78 INo NA INo NA NA INo NA y/14/zuiu 7.68 NA 11/lZ/zUlU 6.84 NS NA TDS (mg/L)1075 NA 1160 NA NA NA NA 1060 NA 1110 NA Gross Alpha minus Rn & U (pCi/L)2 NA 1.6 NA NA NA NA NA NA 2.4 NA Chloride (mg/L)105 NA 108 NA NA NA NA 106 NA 107 NA Cadmium (ug/L)5.2 NA 4.20 NA NA NA NA NA NA 4.11 NA MW-28 (Class III)Uranium (ug/L)4.9 NS NA 4/19/2010 3.36 NS NA NS NA NS NA NS NA 9/14/2010 NA NS NA 11/12/2010 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 TDS (mg/L)4400 NA 4400 NA NA NA NA NA NA 4390 NA MW-29 (Class III)Sulfate (mg/L)2946 NS NA 4/27/2010 2770 NS NA NS NA NS NA NS NA NS NA NS NA 11/9/2010 2690 NS NA Field pH (S.U.)6.46 - 8.5 NA 6.82 NA NA NA NA NA NA 6.17 NA Gross Alpha minus Rn & U (pCi/L)3.33 NA 4.5 NA NA NA NA 2.9 NA 8.8 NA MW-32 (Class III)Chloride (mg/L) 35.39 NS NA 4/20/2010 30 NS NA NS NA NS NA NS NA 9/13/2010 NA NS NA 11/10/2010 35 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 i>i\ = ivcquucu <uiuNA*=Pr*ui"*~4 Exceedances are shown in yellow Values in () parentheses are the field pH measurements for the resampled analyses. Table 1 - GWCL Exceedances for Second Quarter 2016 under the August 24, 2012 GWDP Monitoring Well (Water Class) Constituent Exceeding GWCL GWCL in August 24, 2012 GWDP 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 2011 Monthly Result Q4 2011 Sample Date Q4 20I1 Result November 2011 Monthly Sample Date November 2011 Monthly Result December 2011 Monthly Sample Date December 2011 Monthly Result Required Quarterly Sampling Wells MW-11 (Class II)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 151 118 9/7/2011 106 10/4/2011 112 11/9/2011 105 12/14/2011 100 MW-14 (Class III)Field pH (S.U.)6.5 - 8.5 1/11/2011 6.37 2/7/2011 6.22 3/14/2011 6.76 4/4/2011 6.63 5/10/2011 6.37 6/15/2011 5.83 7/5/2011 6.4 8/3/2011 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 6.44 6.66 3/15/2011 6.79 4/4/2011 6.7 5/11/2011 6.1 5.77 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 Chloride (mg/L)35 1/11/2011 NA 2/2/2011 30 NA 31 NA 6/20/2011 NA 7/6/2011 NA 8/3/2011 32 NA 32 NA NA 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 0.3 0.9 0.6 9/7/2011 2.4 10/12/2011 0.9 11/9/2011 1.3 12/14/2011 2.3 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)70 800 730 12(H)390 1900 730 7/6/2011 3(H)8/3/2011 8/30/11 10(H)13(H)440 1200 1400 Chloride (mg/L)58.31 1/12/2011 52 2/16/2011 59 64 64 54 6/20/2011 39 64 60 66 61 55 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 0) Nitrate + Nitrite (as N) (mg/L)2.5 15 16 3/14/2011 17 4/11/2011 16 5/10/2011 16 17 17 8/3/2011 14 16 10/4/2011 11/29/2011 16 11/8/2011 16 12/12/2011 16 Chloride (mg/L)128 NA 134 NA 134 128 127 111 126 145 129 122 124 Uranium (ug/L)8.32 NA 5.97 NA 6.49 NA NA NA 8 NA 9.83 NA NA Field pH (S.U.)6.5 - 8.5 1/10/2011 6.65 2/1/2011 6.96 7.10 6.83 6.70 6/20/2011 5.66 7/5/2011 6.65 6.61 9/7/2011 6.80 6.96 (6.73)6.83 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 3/14/2011 22 4/1/2011 21 5/10/2011 20 22 22 8/2/2011 20 21 10/3/2011 21 11/8/2011 (11/29/12) 21 12/12/2011 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 6/20/2011 145 7/5/2011 148 148 9/6/2011 148 145 145 148 Selenium (ug/L)71 NS 64.6 NA 65.2 NS NS NS 66.2 NS 68.8 NS 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 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 NS NA 6/7/2011 369 NA NA 348 267 9/7/11 270 10/3/11 271 11/8/2011 283 12/14/11 247 Thallium (ug/1)0.5 NA <0.50 NA <0.50 NA NA NA 0.52 NA 0.57 <0.50 0.63 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 NA 7.31 NS NA NS NA 7/20/11 6.49 8/30/2011 6.40 6.47 6.59 6.51 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 ji1 pling Wells MW-01 (Class II) Chloride (mg/L)22.1 NA NA NS NA 4/11/2011 18 NA NS NA NA NS NA NS NA 10/11/2011 17 NS NA NS NA Field pH (S.U.)6.77 - 8.5 NS NA NS NA NA 7.06 (7.67)NS NA NA NS NA NA NA 7.08 (7.51)NA NA Sulfate (mg/L)838 NA NA NA 704 NA NA NA NA NA 713 NA NA MW-03 (Class III) Selenium (ug/L)37 NA 40.5 NS NA 4/13/2011 45.4 NS NA NS NA NS NA 8/10/2011 46 NS NA 10/10/2011 46.7 NS NA NS NA Field pH (S.U.)6.5 - 8.5 NA 6.09 NA 6.46 NA NA NA 6.32 NA 6.53 (6.83)NA NA Beryllium (ug/L)2 NA NA NA <0.5 NA NA NA NA NA <0.5 NA NA Cadmium (ug/L)4.67 NA NA NA 1.26 NA NA NA NA NA 1.01 NA NA Zinc (ug/L)173.19 MS NA 9/1 i NA NA 104 NA NA NA NA NA 74 NA NA Thallium (ug/1)1.6 INS NA Z/1 j! ZU11 NA NA 1.02 NA NA NA NA NA 1.38 NA NA Sulfate (mg/L)3663 NA NA NA 3060 NA NA NA NA NA 3470 NA NA Nitrate + Nitrite (as N) (mg/L) 0.73 NA NA NA 0.3 NA NA NA NA NA 0.3 NA NA Tetrahydrofuran (ug/L)23 NA NA NA 1 NA NA NA NA NA <1.0 NA NA Manganese (ug/L)4233 NA NA NA 223 NA NA NA NA NA 94 NA NA Fluoride (Mg/L)0.68 NA 0.69 NA 0.68 NA NA NA 0.96 NA 0.91 NA NA MW-03A (Class III)Field pH (S.U.)6.5 - 8.5 NS NA 2/16/2011 6.05 NS NA 4/13/2011 6.58 NS NA NS NA Me NA 8/11/2011 6.19 NS NA 10/11/2011 6.5 (6.92) NS NA NS NA Sulfate (mg/L)3640 NA 3730 NA 3350 NA NA NA 3560 NA 3750 NA NA Selenium (ug/L)89 NA 99 NA 85.8 NA NA NA 88.5 NA 95 NA NA MW-05 (Class II)Uranium (ug/L)7.5 NS NA 2/14/2011 29.5 NS NA 4/12/2011 7.16 NS NA NS NA NS NA 8/9/2011 0.5 NS NA 10/10/2011 4.52 NS NA NS NA MW-12 (Class III)Selenium (ug/L)25 MO NA 39.0 NS NA 4/5/2011 21.7 MO NA NA NA 25.4 NS NA 10/6/2011 35.4 NS NA NS NA Field pH (S.U.)6.5 - 8.5 JNa NA 2/1 j/ZUl l 6.43 NA 6.67 NS NA NS NA NS NA 8/9/2011 6.13 NA 6.7 (6.97)NA NA MW-15 (Class ID)Selenium (ug/L)128.7 NS NA NA NS NA 4/12/2011 116 MC NA 1VTO NA MC NA MC NA NS NA 10/10/2011 112 NS NA NS NA Field pH (S.U.)6.62 - 8.5 NA iNa NA NA 6.88 NS NA INS NA INS NA INS NA NA 6.70 NA NA Q1 2011 Results Q2 2011 Results Q3 2011 Results Q4 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 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 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-Annual Sampling Wells, continued Thallium (ug/1) 1.95 NA 3.49 NA 3.74 NA NA NA 4.0 3.39 NA 3.83 NA NA MW-18 (Class 1U)Sulfate (mg/L)1938.9 NA 1770 NA 1780 NA NA NA 8/10/2011 9/21/11 1910 NA 2020 NA NA Field pH (S.U.) 6.25-8.5 NS NA 2/15/2011 6.21 NS NA 4/6/2011 6.71 NS NA NS NA NS NA 5.95 (6.30)NS NA 10/11/2011 6.55 (6.63)NS NA NS NA TDS (mg/L)3198.77 NA 3250 NA 3250 NA NA NA 3190 NA 3220 NA NA MW-19 (Class III)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 Cadmium (ug/L)2.5 NA 2.78 NA 2.61 NA NA NA 1.46 NA 1.78 NA NA Fluoride (mg/L)0.36 NA NA NA 0.19 NA NA NA NA NA 0.36 NA NA MW-24 (Class III)Sulfate (mg/L)2903 NS NA 2/10/2011 NA NS NA 4/5/2011 2560 NS NA NS NA NS NA 8/4/2011 NA NS NA 10/11/2011 2500 NS 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 Nitrate + Nitrite (as N) (mg/L)5.6 NA 6 NA 6.4 NA NA NA 6 NA 6.3 NA NA Chloride (mg/L)38 NA 46 NA 43 NA NA NA 43 NA 44 NA NA MW-27 (Class III)Sulfate (mg/L)462 MC NA O/O/OA 1 1 455 KTC NA 442 MC NA MC NA MC NA O/O/') At 1 424 MC NA 1 A/C/*1D 1 1 456 MC NA MC NA Field pH (S.U.)6.5 - 8.5 NA z/y/zui i 6.71 NA 4/j/ZUl 1 6.79 NA NA NA 5/5/ZU11 6.39 NA IU/5/zUl 1 7.17 Na NA Na NA TDS (mg/L)1075 NA 1090 NA 1190 NA NA NA 1090 NA 1110 NA NA Gross Alpha minus Rn & U (pCi/L)2 NA 0.7 NA 1.1 NA NA NA 0.8 NA 1.5 NA NA Chloride (mg/L)105 NA 114 NA 109 NA NA NA 105 NA 143 NA NA Cadmium (ug/L)5.2 NA NA NA 4.13 NA NA NA NA NA 3.99 NA NA MW-28 (Class III)Uranium (ug/L)4.9 NS NA 2/14/2011 NA NS NA 4/11/2011 3.29 NS NA NS NA NS NA 8/8/2011 NA NS NA 10/5/2011 3.19 NS 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 TDS (mg/L)4400 NA NA NA 4080 NA NA NA NA NA 4280 NA NA MW-29 (Class III)Sulfate (mg/L) 2946 NS NA NS NA NS NA 4/18/2011 2600 NS NA NS NA NS NA 8/9/2011 NA NS NA 10/5/2011 2850 NS NA NS NA Field pH (S.U.)6.46 - 8.5 NA NA NA 6.45 NA NA NA 6.20 NA 6.52 NA NA Gross Alpha minus Rn & U (pCi/L)3.33 NA 1.5 NA 4.6 NA NA NA 8/2/2011 8/30/11 1.9 NA 3.7 NA NA MW-32 (Class HI)Chloride (mg/L)35.39 NS NA 2/9/2011 NA NS NA 4/1/2011 33 NS NA NS NA NS NA NA NS NA 10/3/2011 34 NS NA NS 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 inis. = ivcquucu <uiu xnui 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 Second Quarter 2016 under the August 24, 2012 GWDP 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 D)Manganese (ug/L)131.29 1/26/2012 102 2/13/2012 154 3/13/2012 121 4/10/2012 132 5/8/2012 127 6/19/2012 122 7/11/2012 135 8/7/2012 166 9/19/2012 130 10/23/2012 161 11/12/2012 138 12/24/2012 137 MW-14 (Class HI)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 11/27/2012 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 6.55 4/9/2012 6.58 6.73 6.99 7/10/2012 6.88 8/6/2012 6.55 9/18/2012 6.54 6.54 11/12/2012 6.47 6.62 Chloride (mg/L)35 NA 30 3/14/2012 NA NA 5/2/2012 30 6/18/2012 NA 33 NA NA 10/22/2012 NA 28.8 12/24/2012 NA 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 4/11/2012 3.4 2.9 2.3 7/11/2012 1.9 8/8/2012 1.6 9/19/2012 1.8 3.5 0.55 12/24/2012 1.46 Uranium (ug/L)41.8 64.6 2/21/2012 59.4 31.2 42.2 18.2 66.0 28.4 67.4 64.9 10/24/2012 26.9 56.8 51.3 Chloroform (ug/L)70 19(H)2/15/2012 3300 2900 2900 5/7/2012 6/26/2012 1700 2400 8/16/2012 970 2200 2300 4720 4020 1250 Chloride (mg/L)58.31 68 40 3/14/2012 74 82 74 6/19/2012 85 7/11/2012 78 78 67 2.62 11/15/2012 52.9 65.9 Field pH (S.U.)6.74 - 8.5 6.59 2/15/2012 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 2/14/2012 17 18 4/10/2012 17 16 15 7/10/2012 17 8/7/2012 18 9/19/2012 16 16.2 18.5 12/26/2012 17.2 Chloride (mg/L)128 124 126 128 128 124 131 128 139 130 10/23/2012 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 7.12 3/14/2012 6.86 7.05 5/2/2012 6.95 6/18/2012 7.10 7.25 6.95 7.85 6.80 11/13/2012 6.67 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 1/24/2012 21 2/13/2012 21 22 4/9/2012 21 20 21.6 7/9/2012 21 8/6/2012 21 9/18/2012 21 10/22/2012 18 23.6 12/18/2012 22.2 TDS (mg/L)1320 1360 1240 1400 1380 1410 1460 14(H)1400 1460 1320 1230 1270 Chloride (mg/I.)143 155 ISO 152 160 151 6/18/2012 138 161 175 172 157 11/6/2012 189 170 Selenium (ug/L)71 NS 67.8 3/13/2012 NS NS 5/2/2012 70.2 6/29/2012 NA 74 NA NA NA 76.9 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 Sulfate (mg/L)532 539 538 517 547 532 497 529 571 561 545 557 664 MW-35 (Class II) Manganese (ug/L)200 1/24/2012 264 2/14/2012 253 269 4/10/2012 277 258 304 7/10/2012 272 8/8/2012 273 9/19/2012 283 253 241 12/18/2012 240 Thallium (ug/1)0.5 <0.50 0.65 0.71 0.59 0.66 < 0.50 0.57 0.61 0.54 0.517 0.554 0.5 Gross Alpha minus Rn & U (pCi/L)3.75 6.5 4.1 3/13/2012 6.2 4.1 4.5 6/19/2012 4.9 3.5 4.2 5.4 4.31 4.23 6.5 Field pH (S.U.)6.5 - 8.5 6.35 6.67 6.48 6.84 5/2/2012 6.61 6.90 6.87 6.74 6.81 10/23/2012 6.43 11/13/2012 6.50 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 Selenium (ug/L)37 NA 43.1 NA NA 52.8 NA 51.1 NA NA NA 58.9 NA Field pH (S.U.) 6.5 - 8.5 NA 6.63 NA NA 6.67 NA 6.99 NA NA NA 6.55 NA Beryllium (ug/L)2 NA NA NA NA <0.5 NA NA NA NA NA <0.5 NA Cadmium (ug/L)4.67 NA NA NA NA 1.06 NA NA NA NA NA 0.954 NA MW-03 (Class III)Zinc (ug/L)173.19 vtc NA T/OQ/IAt O NA Vtc NA VIC NA ^/i a /on i o 68 VIC NA VI A NA VIC NA VTC NA vrc NA i i /oo /on i o 46.1 vrc NA INo z/zy/zu tz INo D/14/ZUIZ [No INA INo INo INo 11/Zs/ZUlZ INO Thallium (ug/1) 1.6 NA NA NA NA 1.37 NA NA NA NA NA 1.16 NA Sulfate (mg/L)3663 NA NA NA NA 3140 NA NA NA NA NA 2340 NA Nitrate + Nitrite (as N) (mg/L)0.73 NA NA NA NA 0.4 NA NA NA NA NA 0.419 NA Tetrahydrofuran (ug/L)23 NA NA NA NA <1.0 NA NA NA NA NA <1.0 NA Manganese (ug/L) 4233 NA NA NA NA 114 NA NA NA NA NA 89.1 NA Fluoride (Mg/I-)0.68 NA 0.86 NA NA 1.04 NA 0.96 NA NA NA 1.26 NA MW-03A (Class III) Field pH (S.U.)6.5 - 8.5 NS NA 3/1/2012 6.46 VTC NA NS NA 5/15/2012 6.68 NS NA 7/19/2012 7.01 NS NA NS NA VIC NA 11/29/2012 6.35 VIC NA Sulfate (mg/L) 3640 NA 3020 [NO NA NA 3220 NA 37(H)NA NA [NO NA 2780 INo NA Selenium (ug/L)89 NA 65.8 NA NA 85.1 NA 99.3 NA NA NA 111 NA MW-05 (Class II)Uranium (ug/L)7.5 NS NA 2/28/2012 18.6 NS NA NS NA 5/9/2012 1.23 NS NA 7/16/2012 0.75 NS NA NS NA NS NA 11/27/2012 0.402 NS NA n /TMopo ITIt Selenium (ug/L)25 KIC NA NA VIC NA vrc NA 19.6 VIC NA nn~i /on i o 20.7 vtc NA vrc NA NA i i /oo/on t o 23.0 NAMW-iz (Class tit)Field pH (S.U.)6.5 - 8.5 INvS NA z/zy/zu i z 6.81 [No NA INo NA !>/ IU/ZU1Z 6.91 INo NA III IIlull 6.98 INo NA [No NA NS NA 11/27/2012 6.54 NS NA MW 1 S tPIatis ITI>Selenium (ug/L)128.7 MV1 NA 2/22/2012 NA KIC NA VIC NA 5/9/2012 152 VIC NA 7/17/2012 120 VIC NA VIC NA VIC NA 11/1 4/0/11 0 117 VIC NA ivi w-13 iciass mi Field pH (S.U.)6.62 - 8.5 NA 6.84 [No NA [No NA 6.63 [NO NA 7.05 INo NA [No NA INo NA 11/14/2012 6.86 [No NA Q12012 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 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 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 TDS (mg/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 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 Chloride (mg/L)38 NA 45 NA NA 46 NA 47 NA NA NA 44.2 NA MW-27 (Class III)Sulfate (mg/L)462 vtc NA 451 KTC NA KIC NA c/i /ini i 446 KTC NA i/I /:/ini i 453 XTC NA XTC NA VTC NA ii/ii /in 11 451 VTC NA Field pH (S.U.)6.5 - 8.5 INa NA Z/zo/ZUlZ 7.24 IN5 NA NA j/l/ZUlZ 7.03 NA // lo/zuiz 7.40 INa NA INS NA INS NA 11/13/ZU1Z 6.69 INS NA TDS (mg/L)1075 NA 1140 NA NA 1170 NA 1150 NA NA NA 1070 NA Gross Alpha minus Rn & U (pCi/L)2 NA 2.3 NA NA 0.8 NA 1.2 NA NA NA 1.33 NA Chloride (mg/L)105 NA 109 NA NA 114 NA 7/16/2012 8/1/2012 105 NA NA NA 115 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 2/22/2012 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 NA 7.12 NA NA 6.47 NA 7/16/2012 8/1/2012 6.68 (6.45)NA NA NA 6.48 NA Gross Alpha minus Rn & U (pCi/L)3.33 NA 1.8 NA NA 2.4 NA 1.4 NA NA NA 2.97 NA MW-32 (Class III)Chloride (mg/L) 35.39 NS NA 2/21/2012 NA NS NA NS NA 4/30/2012 33 NS NA 7/9/2012 1.4 NS NA NS NA NS NA 11/6/2012 32.1 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 GWCL values are taken from August 24. 2012 version of GWDP. NS = Not Required and Not Sampled iniv — ivcquucu oiiu 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 Second Quarter 2016 under the August 24, 2012 GWDP Q2 2013 Results Q3 2013 Results Q4 2013 Results Monitoring Well (Water Class) Constituent Exceeding GWCL GWCL in August 24. 2012 GWDP January 2013 Monthly Sample Date January 2013 Monthly Result Q1 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 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 7/10/2013 138 8/20/2013 158 9/18/2013 134 10/22/2013 129 11/19/2013 152 12/18/2013 196 MW-14 (Class HI)Field pH (S.U.) 6.5 - 8.5 1/23/2013 6.48 2/26/2013 6.52 3/20/2013 6.48 4/16/2013 7.58 5/14/2013 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 6.65 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 6.81 6.62 12/17/2013 6.73 Chloride (mg/L)35 1/22/2013 NA 2/20/2013 36.1 NA NA 28.1 30.4 28 31.1 29.6 10/22/2013 28.6 11/19/2013 29 31.2 Cadmium (ug/L)1.5 NA 1.35 1.40 1.36 1.52 1.31 1.41 1.57 1.31 1.50 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 HI) 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 6/5/2013 6/25/2013 3.042.11* 7/11/2013 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 1500 1340 1680 1210 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 87.8 77.9*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* [12.1]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 21.4 3/20/2013 14.3 16.8 18.8 6/25/2013 16.1 7/10/2013 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 11/20/2013 124 134 Uranium (ug/L)8.32 8.36 1A 6.85 4/17/2013 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 2/26/2013 6.93 6.91 7.42 5/15/2013 7.54 6.93 6.87 7.06 6.78 6.96 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 19.3 3/19/2013 19.1 4/16/2013 18.8 23.8 6/24/2013 20.0 21.7 8/19/2013 16.0 9/17/2013 21.2 10/23/2013 21.2 11/18/2013 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 2/19/2013 174 168 171 169 179 182 183 193 188 174 203 Selenium (ug/L)71 NS 74.1 81.8 72.9 75.9 73.7 7/9/2013 75.7 73.2 72.6 80.7 74.5 79.8 Field pH (S.U.)6.5 - 8.5 6.94 7.32 7.28 6.37 7.92 7.10 6.98 7.36 7.06 7.35 6.99 7.23 Sulfate (mg/L)532 611 644 611 668 630 659 659 656 666 637 609 656 MW-35 (Class II) Manganese (ug/L) 200 1/23/2013 247 272 246 4/17/2013 243 252 6/24/2013 243 250 8/19/2013 262 9/17/2013 257 10/23/2013 240 11/19/2013 251 12/17/2013 260 Thallium (ug/1)0.5 <0.5 <0.5 0.505 <0.5 0.715 0.946 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 Gross Alpha minus Rn & U (pCi/L)3.75 6.62 5.09 9.51 4.75 5/13/2013 4.92 3.24 7/9/2013 5.70 3.92 5.10 3.73 5.39 4.74 Field pH (S.U.)6.5 - 8.5 6.54 2/26/2013 6.68 3/19/13 6.43 6.96 7.33 6.70 6.51 1.02 6.50 6.83 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 Semi-Annual Sampling Wells MW-01 (Class II) Chloride (mg/L)22.1 NA NA NS NA NS NA 5/21/2013 17.8 NS NA 7/23/2013 NA NS NA NS NA NS NA 18.7 NS NA Field pH (S.U.) 6.77 - 8.5 NS NA 3/12/2013 6.77 NA NA 7.57 NA 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-03 (Class III) Selenium (ug/L)37 NA 51.8 NS NA NA 46.3 NS NA 7/18/2013 52.0 NS NA NS NA NS NA 32.8 NS NA Field pH (S.U.)6.5 - 8.5 NA 6.20 NA NA 7.14 NA 6.46 NA NA NA 6.78 NA Beryllium (ug/L)2 NS NA NA NA NA <0.5 NA NA NA NA NA <0.5 NA Cadmium (ug/L)4.67 NA NA NA NA 1.42 NA NA NA NA NA <0.5 NA Zinc (ug/L)173.19 NA NA NA NS NA 72.1 NA NA NA NA NA i'l /1 i /'ini 1 20.3 NA Thallium (ug/1)1.6 NA jIIjU ZU1.1 NA NA NA j/zz/ZUl J 1.21 NA NA NA NA NA IZ/11/ZU13 LI NA Sulfate (mg/L) 3663 NA NA NA NA 2180 NA NA NA NA NA 3760 NA Nitrate + Nitrite (as N) (mg/L)0.73 NA NA NA NA 0.456 NA NA NA NA NA 1.21 NA Tetrahydrofuran (ug/L)23 NA NA NA NA <1.0 NA NA NA NA NA 4.86 NA Manganese (ug/L)4233 NA NA NA NA 99.1 NA NA NA NA NA 975 NA Fluoride (Mg/L)0.68 NA 0.902 NA NA 0.994 NA 1.18 NA NA NA 1.28 NA MW-03A (Class III)Field pH (S.U.) 6.5 - 8.5 NS NA V14/901 4 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 NA .>/ 1 jl ZU1.1 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)Uranium (ug/L)7.5 NS NA 3/11/2013 36 NS NA NS NA 5/14/2013 1.33 NS NA 7/18/2013 0.574 NS NA NS NA NS NA 12/4/2013 20.1 NS NA Selenium (ug/L)25 NS NA 19.6 NS NA NS NA 5/15/2013 19 NS NA 7/17/2013 20.5 NS NA NS NA NS NA i u\ /in 11 21.7 NS NA ivi w iz »,ciass iiij Field pH (S.U.)6.5 - 8.5 NA 5IOI IK) 15 6.56 NA NA 7.19 NA 6.60 NA NA NA 12/9/2013 6.69 NA MW- I S fplacs Tin Selenium (ug/L)128.7 NS NA 4/S/9014 137 NS NA NS NA 5/15/2013 120 NS NA 7/18/2013 100 NS NA NS NA NS NA 11 /')n/'>n i j 106 NS NAivi w -1 j (.ciass Field pH (S.U.)6.62 - 8.5 NA 5/J/£K)l5 6.75 NA NA 7.27 NA 6.68 NA NA NA 1 I/ZU/ZUI3 6.61 NA Q1 2013 Results Q2 2013 Results Q3 2013 Results Q4 2013 Results Monitoring Well (Water Class) Constituent Exceeding GWCL GWCL in Current GWDP January 2013 Monthly Sample Date January 2013 Monthly Result Q1 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 Semi-Annual Sampling Wells, continued MW-18 (Class HI) Thallium (ug/1)1.95 NA 2/25/2013 3.26 NA NA 5/20/2013 2.81 NS NA 7/15/2013 3.32 NS NA NA NS NA 12/3/2013 3.06 NS NA Sulfate (mg/L)1938.9 NA 1270 NA NA 1860 NA 1860 NA NS NA NA 2000 NA Field pH (S.U.)6.25-8.5 NS NA 6.35 NS NA NS NA 6.97 NA 6.45 NA NA NA 6.38 NA TDS (mg/L)3198.77 NA 3350 NA NA 3160 NA 3170 NA NA NA 3240 NA MW-19 (Class HI)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-24 (Class III) Cadmium (ug/L)2.5 NS NA 3/13/2013 2.0 NA NA 1.32 NS NA 7/19/2013 6.72 NS NA NS NA NS NA 12/12/2013 1.15 NS NA Fluoride (mg/L)0.36 NA 0.355 NA NA 0.211 NA 0.288 NA NA NA 0.310 NA Sulfate (mg/L)2903 NA NA NS NA NS NA 5/22/2013 2070 NA NA NA NA NA 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 NS NA 2/25/2013 7.94 NA NA 7.09 NS NA 7/17/2013 6.97 NS NA NS NA NS NA 12/4/2013 7.89 NS NA Chloride (mg/L)38 NA 50.3 NA NA 44.3 NA 44.2 NA NA NA 45.0 NA Sulfate (mg/L)462 NA 431 MC NA MC NA «/•■> i /on 11 497 NA NA NA NA NA 442 NA Field pH (S.U.) 6.5 - 8.5 NA 7.03 NA INcS NA j/Z 1/ZU1J 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 Gross Alpha minus Rn & U (pCi/L)2 NA <1.0 NA NA 1.57 NA <1.00 NA NA NA 1.28 NA MW-28 (Class III) Chloride (mg/L)105 NS NA 3/5/2013 no NA NA 102 NS NA 7/17/2013 107 NS NA NS NA NS NA 12/4/2013 109 NS NA Cadmium (ug/L)5.2 NA NA NA NA 4.61 NA NA NA NA NA 4.74 NA Uranium (ug/L)4.9 NA NA NS NA NS NA 5/15/2013 3.58 NA NA NA NA NA 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 NA 3/6/2013 4500 NS NA NA 4340 NS NA 4270 NS NA NS NA NS NA 11/20/2013 4370 NS NA Sulfate (mg/L) 2946 NS NA NA NA NS NA 5/23/2013 2450 NA 7/17/2013 NA NA NA NA 2750 NA Field pH (S.U.)6.46 - 8.5 NA 6.36 NA NA 6.88 NA 6.37 NA NA NA 6.35 NA MW-32 (Class III) Gross Alpha minus Rn & U (pCi/L)3.33 NA 2/19/2013 5.02 NS NA NA 3.72 NS NA 6.46 NS NA NS NA NA 11/18/2013 1.86 NS NA Chloride (mg/L)35.39 NS NA NA NA NS NA 5/13/2013 32.3 NA 7/9/2013 NA NA NA NS NA 33.7 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 ixiv = ivcquucu <uiu 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 Second Quarter 2016 under the August 24, 2012 GWDP Q1 2014 Results Q2 2014 Results Q3 2014 Results Q4 2014 Results Monitoring Well (Water Class) Constituent Exceeding GWCL GWCL in August 24, 2012 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 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 11)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 74.0 10/6/2014 157 11/17/2014 125 12/10/2014 186 MW-14 (Class III)Field pH (S.U.)6.5 - 8.5 1/8/2014 6.60 2/24/2014 6.16 3/11/2014 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 9/2/2014 6.41 10/7/2014 6.46 11/12/2014 6.25 12/10/2014 6.40 Field pH (S.U.) 6.5 - 8.5 6.37 6.10 6.27 7.18 6.80 6.74 6.36 7.17 6.50 6.49 6.31 6.36 MW-25 (Class III)Chloride (mg/I.)35 1/7/2014 31 2/13/2014 30.4 3/10/2014 31.5 4/28/2014 31 5/13/2014 26.4 6/2/2014 30.9 7/28/2014 NA 8/18/2014 NA 9/3/2014 30 10/6/2014 NA 11/4/2014 29.6 12/9/2014 NA Cadmium (ug/L)1.5 1.39 1.29 1.29 1.51 1.34 1.24 1.30 1.30 1.30 1.41 1.57 1.27 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 Nitrate + Nitrite (as N) (mg/L)0.62 2.42 2.12 1.30 1.20 1.64 1.42 2.0 1.00 1.10 0.704 1.09 <0.100 Uranium (ug/L)41.8 81.7 72.2 51.8 96.0 90.6 75.0 86.5 74.4 48.4 75.4 66.0 42.5 Chloroform (ug/L)70 1580 2810 2800 1310 1580 1450 2330 2200 1580 894 1520 12/10/14 12/15/14 2280 MW-26 (Class HI)Chloride (mg/L)58.31 1/8/2014 69.7 2/24/2014 70.4 3/12/2014 61.0 4/30/2014 62.1 5/14/2014 61.0 6/5/2014 63.2 7/29/2014 80.0 8/20/2014 59.0 9/4/2014 68.0 10/7/2014 57.7 11/18/2014 54.2 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 Nitrate + Nitrite (as N) (mg/L)2.5 20.3 18.4 21.3 18.3 17.9 19.4 15.6 13.8 16.8 11.0 16.2 17.1 Chloride (mg/L)128 131 135 144 154 128 128 140 139 136 136 154 138 Uranium (ug/L)8.32 NA 6.83 7.84 6.84 9.82 7.35 7.40 7.60 7.70 10/7/2014 7.76 11/10/2014 7.65 12/10/2014 7.67 MW-30 (Class II) Field pH (S.U.)6.5 - 8.5 1/8/2014 6.74 2/25/2014 6.80 3/11/2014 6.56 4/23/2014 7.06 5/14/2014 6.88 6/3/2014 6.89 7/29/2014 6.76 8/20/2014 7.51 9/9/2014 6.82 6.92 6.22 6.77 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 Nitrate + Nitrite (as N) (mg/L)5 24.0 20.6 26.2 19.1 23.3 23.1 19.0 15.2 18.9 15.9 20.9 17.0 TDS (mg/L)1320 1510 1460 1490 1440 1510 1520 14(H)1410 1460 1420 1520 1450 MW-31 (Class III)Chloride (mg/L)143 194 197 230 230 200 173 "7/'to/mi A 2(H)O/I C/OA1 A 210 Q/7/OOl A 210 10/6/2014 205 1 1 /14/9014 204 19/9/9014 215 Selenium (ug/L)71 1/7/2014 74.4 75.8 77.2 85.4 74.5 6/2/2014 69.4 //28/ZU14 77.9 o/Io/ZU14 82.8 81.5 78.9 73.0 1 Liyi tA) 1H 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 Sulfate (mg/L)532 558 480 681 527 639 555 6(H)620 560 606 639 687 Manganese (ug/L)200 252 247 204 194 249 202 212 191 177 228 222 232 Thallium (ug/1)0.5 0.535 <0.5 <0.5 0.582 0.521 <0.5 <0.5 <0.5 0.6 <0.5 <0.5 <0.5 Gross Alpha minus Rn & U (pCi/L)3.75 4.12 3.98 4.33 2.95 3.67 3.36 3.09 4.70 3.93 4.14 3.92 4.54 MW-35 (Class II) 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 5/14/2014 7.10 6/4/2014 6.83 7/29/2014 6.55 8/20/2014 7.07 9/3/2014 6.46 10/6/2014 6.54 11/12/2014 6.35 12/9/2014 6.25 Selenium (ug/L)12.5 8.95 12.3 14.1 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 Required 5kmi-Annual Sampling Wells Chloride (mg/L)22.1 NA NA NA NA NA 20.4 NA NA NA NA 19 NA MW-01 (Class II)Field pH (S.U.)6.77 - 8.5 NS NA NS NA 2/20/2014 6.61 NS NA NS NA 5/28/2014 7.11 NS NA NS NA 9/10/2014 6.75 NS NA 11/17/2014 6.87 NS NA Sulfate (mg/L)838 NA NA 836 NA NA 909 NA NA 810 NA 920 NA Selenium (ug/L)37 NA NA 37.0 NA NA 69.5 NA NA 94.0 NA 62.4 NA Field pH (S.U.)6.5 - 8.5 NA NA 6.23 NA NA 6.56 NA NA 6.13 NA 6.37 NA Beryllium (ug/L)2 NA NA NA NA NA <0.5 NA NA NA NA <0.5 NA Cadmium (ug/L) 4.67 NA NA NA NA NA 1.7 NA NA NA NA 2 NA MW-03 (Class III)Zinc (ug/L)173.19 NA NA NA NA XI c NA 94.5 KTC NA xiQ NA Q/1 fiOC) 14 NA mc NA 11/17/2014 98.3 NS NA Thallium (ug/1)1.6 NS NA NS NA 2/26/2014 NA NS NA NA 5/5U/2U14 1.28 NA NA yl lOiZU14 NA IN .3 NA ii/1 #/ i“1.32 NA Sulfate (mg/L)3663 NA NA NA NA NA 3460 NA NA 3120 NA 3800 NA Nitrate + Nitrite (as N) (mg/L)0.73 NA NA NA NA NA 0.573 NA NA 0.6 NA 0.330 NA Tetrahydrofuran (ug/L)23 NA NA NA NA NA <1.0 NA NA NA NA <1.0 NA Manganese (ug/L) 4233 NA NA NA NA NA 104 NA NA NA NA 87.000 NA Fluoride (Mg/L)0.68 NA NA 0.771 NA NA 1.02 NA NA 1.0 NA 1.08 NA MW-03A (Class III)Field pH (S.U.)6.5 - 8.5 NA XI c NA 6.58 NIC NA XI c NA s An/on i a. 6.60 XIC NA NS NA 9/17/2014 6.40 NS NA 11/12/2014 6.41 NS NA Sulfate (mg/L) 3640 NS NA isa NA 3/5/2U14 3100 IN5 NA NA 5/jU/ZU14 3830 INS 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)Uranium (ug/L)7.5 NS NA NS NA 2/12/2014 22.0 NS NA NS NA 6/4/2014 2.42 NS NA NS NA 9/11/2014 0.90 NS NA 11/12/2014 36.20 NS NA MW-12 (Class III)Selenium (ug/L)25 NA NA 23.7 NA NA 4LiAnr\i a 17.20 XI c NA NA 0/16/9014 NA xie NA 1 1/11/2014 33.30 NS NA Field pH (S.U.)6.5 - 8.5 NS NA NS NA 2/12/2014 6.13 NS NA NS NA O/4/zU 14 7.10 NA INS NA yl ID/ZUIH 6.47 INo NA 6.25 NA MW-15 (Class III)Selenium (ug/L)128.7 NA NA ^ C /'lA 1 A 110 NIC NA xi e NA aiAnru a 105 XIC NA xie NA 9/2/2014 273 NS NA 11/12/2014 106 NS NA Field pH (S.U.)6.62 - 8.5 NS NA NS NA 2/25/2014 6.51 IN5 NA IN5 NA 0/4/ZU14 6.91 INo NA INo NA 6.38 NA 6.41 NA Q12014 Results Q2 2014 Results Q3 2014 Results 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-\nnual Samp ng Wells, continued MW-18 (Class ffl) Thallium (ug/1) 1.95 NS NA NS NA 2/19/2014 2.77 NS NA NA 2.42 NS NA NA 9/9/2014 2.7 NA 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 NS NA 5/27/2014 7.04 NA NS NA 6.40 NS NA 11/10/2014 6.10 NA TDS (mg/L)3198.77 NA NA 3080 NA NA 3260 NA NA 3180 NA 2960 NA MW-19 (Class ID)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-24 (Class HI) Cadmium (ug/L)2.5 NS NA NS NA 3/6/2014 5.92 NS NA NA 2.91 NS NA NA 9/17/2014 1.5 NA 1.17 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 NA NA NS NA 5/30/2014 2450 NA NS NA NA NS NA 11/19/2014 3120 NS NA Thallium (ug/L)1 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 NA 2/25/2014 7.98 NS NA NA 7.35 NS NA NS NA 9/8/2014 6.30 NA 7.70 NA Chloride (mg/L)38 NA NA 47.0 NA NA 45.9 NA NA 46.0 NA 42.6 NA Sulfate (mg/L)462 NA wc NA 411 NA MO NA O/IO/OAI A 484 NA NA 414 NA 1 t /C 1 A 419 NA Field pH (S.U.)6.5 - 8.5 NA NA 6.62 NA NA 5//5/ZU14 7.80 NA NA 6.97 NS NA 11/5/2014 6.70 NS NA TDS (mg/L)1075 NA NA 1040 NA NA 1040 NA NA 1020 NA 1090 NA Gross Alpha minus Rn & U (pCi/L)2 NA NA 1.08 NA NA 2.33 NA NA 1.16 NA <1.0 NA MW-28 (Class HI) Chloride (mg/L)105 NS NA NA 2/26/2014 113 NS NA NA 114 NS NA NS NA 9/16/2014 112 NA 117 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 NA NS NA NA NA NS NA 6/18/2014 61.3 NA NA 10.6 NS NA 11/5/2014 21.2 NS 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 HI) TDS (mg/L)4400 NS NA NA 2/25/2014 4500 NS NA NA 4200 NS NA NS NA 9/10/2014 4280 NA 4210 NA Sulfate (mg/L) 2946 NA NS NA NA NA NS NA 6/3/2014 2510 NA NA NA NS NA 11/10/2014 2760 NS 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 MW-32 (Class III) Gross Alpha minus Rn & U (pCi/L)3.33 NS NA NA 2/11/2014 1.94 NS NA NA 5/23/2014 4.35 NS NA NS NA 9/2/2014 3.69 NS NA 2.56 NA Chloride (mg/L) 35.39 NA NS NA NA NA NS NA 35.6 NA NA 8/26/2014 34 NA 11/5/2014 33.3 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. Table 1 - GWCL Exceedances for Second Quarter 2016 under the August 24, 2012 GWPP Q1 2015 Results Q2 2015 Results Q3 2015 Results Q4 2015 Results Monitoring Well (Water Class) Constituent Exceeding GWCL GWCL in August 24, 2012 GWDP January 2015 Monthly Sample Date January 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 Quarterly Sampling Weils 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 160 10/7/2015 237 11/11/2015 126 12/8/2015 139 MW-14 (Class III)Field pH (S.U.)6.5 - 8.5 1/21/2015 6.49 2/3/2015 6.44 3/5/2015 6.05 4/8/2015 6.55 5/11/2015 6.30 6/1/2015 6.65 7/7/2015 6.57 8/11/2015 6.37 9/16/2015 6.51 10/8/2015 6.45 11/3/2015 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 6.41 Chloride (mg/L)35 NA 30.5 NA 31.1 NA NS NA NA 36.8 NA NA 29.8 12/8/2015 31.1 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 1/21/2015 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 1.15 8/10/2015 8/17/2015 1.75 9/16/2015 0.795 10/7/2015 2.36 11/11/2015 1.11 1.200 Uranium (ug/L)41.8 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 24(H)2660 3140 Chloride (mg/L)58.31 59.9 77.2 67.2 61.0 61.4 60.8 7/7/2015 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 4.21 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 17.3 4/8/2015 17 5/12/2015 16.1 6/24/2015 15.8 15.3 8/11/2015 17.9 9/15/2015 17.3 10/7/2015 19.1 11/11/2015 16.3 18.2 Chloride (mg/L)128 144 136 3/3/2015 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 7/7/2015 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 19.8 19.0 5/11/2015 18.4 6/23/2015 18.0 18.8 8/10/2015 19.9 9/15/2015 18.9 10/6/2015 22.0 11/9/2015 18.4 19.5 TDS (mg/L)1320 1540 1520 1530 1680 1700 1630 1440 1530 1480 1540 1460 1580 Chloride (mg/L)143 226 211 209 211 225 228 7/6/2015 222 264 231 222 215 12/8/2015 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 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 7.14,7.08 7.22 6.80 6.73 6.47 6.36 6.70 Sulfate (mg/L)532 669 623 616 642 668 6/23/2015 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 190 237 5/12/2015 207.0 6/23/2015 214 185 198 9/15/15 9/22/15 9/28/15 201, 176 10/6/2015 169 11/3/2015 210 177 Thallium (ug/1)0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5, <0.5 0.638 <0.5 <0.5 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 4/9/2015 6.64 6.46 6/2/2015 6/23/2015 6.50, 6.41 7/7/2015 6.56 8/10/2015 6.40 6.52, 6.41, 6.49 6.29 6.72 12/14/2015 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, 28.5 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 21.3, 22.3 23.8 22.7 21.8 Requiired Semi-Annual Sampling Wells MW-01 (Class II) Chloride (mg/L)22.1 NS NA 2/10/2015 NA NS NA 4/15/2015 23.9 NS NA NS NA NA NA NS NA NA 11/11/2015 21.9 NA Field pH (S.U.) 6.77 - 8.5 NA 6.66 NA 7.15 NA NA NS NA 7/27/2015 1A2 NA NS NA 6.83 NS NA Sulfate (mg/L)838 NA 813 NA 892 NA NA NA 876 NA NA 830 NA MW-03 (Class III) Selenium (ug/L)37 NS NA 61.1 NS NA 4/23/2015 5/20/2015 81, 61.7 NS NA NS NA NS NA 68.3 NS NA NA 76.0 NA Field pH (S.U.)6.5 - 8.5 NA 2/11/2015 6.12 NA 4/23/2015 4/29/2015 5/20/2015 6.18, 6.51, 6.23 NA NA NA 6.16 NA NS NA 6.25 NA Beryllium (ug/L)2 NA NA NA 4/23/2015 5/20/2015 1.44, 2.08 NA NA NA NA NA NA 1.84 NA Cadmium (ug/L) 4.67 NA NA NA 5.03, 14.2 NA NA NA NA NA NA 11/3/2015 12.9 NA Zinc (ug/L)173.19 NA NA NA 238, 373 NA NA NA nnfinni« NA NA NA 275 NS NA Thallium (ug/1)1.6 NA NA NA 4/23/2015 5/20/2015 1.47. 1.51 NA NA NA //ZO/ZUij NA NA NA 1.61 NA Sulfate (mg/L) 3663 NA 3260 NA 4/23/2015 3700 NA NA NA 3670 NA NA 3360 NA Nitrate + Nitrite (as N) (mg/L)0.73 NA 0.638 NA 0.642 NA NA NA 0.406 NA NA 0.487 NA Tetrahydrofuran (ug/L)23 NA NA NA <1.0 NA NA NA NA NA NA <1.0 NA Manganese (ug/L)4233 NA NA NA 242. 1240 NA NA NA NA NA NA 1020 NA Fluoride (mg/L)0.68 NA 1.08 NA 1.00 NA NA NA 1.58 NA NA 1.35 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 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)Uranium (ug/L)7.5 NS NA 2/10/2015 2.94 NS NA 4/21/2015 1.3 NS NA NS NA NS NA 7/21/2015 0.887 NS NA NS NA 11/4/2015 2.35 NS NA MW-1 ? fPlass Tin Selenium (ug/L)25 NS NA 2/9/2015 30.0 NS NA 4/21/2015 29.4 NS NA NS NA NA t/o i /im ^24.6 NS NA NA 11/17/2015 24.7 MO NA iviw-iz Vl^ldss 111^Field pH (S.U.)6.5 - 8.5 NA 6.33 NA 4/2172015 6.50. 6.70 NA NA IN5 NA //Zl/ZUlj 6.70 NA IN5 NA 6.65 NA MW-15 mass Till Selenium (ug/L)128.7 NS NA HAJICW S 125 NS NA 4/13/2015 137 NS NA NS NA NS NA in') new s 104 NS NA NS NA 107 MO NA ivi vy u (V_laXS 111^Field pH (S.U.) 6.62 - 8.5 NA //“+/ ZUIJ 6.50 NA 6.82 NA NA NA //ZZ/ZU13 6.61 NA NA 1 1/10/zuo 6.81 INS NA Q1 2015 Results Q2 2015 Results Q3 2015 Results Q4 2015 Results Monitoring Well (Water Class) Constituent Exceeding GWCL GWCL in August 24, 2012 GWDP January 2015 Monthly Sample Date January 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 Semi-Annual Sampling Wells, continued MW-18 (Class III) Thallium (ug/1)1.95 NS NA 2.89 NA 2.81 NA NS NA NS NA 7/27/2015 2.69 NA NS NA 11/9/2015 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 2/3/2015 6.21 NS NA 4/15/2015 6.40 NS NA NA NA 6.43 NS NA NA 6.30 NA TDS (mg/L) 3198.77 NA 3240 NA 3350 NA NA NA 3190 NA NA 3000 NA MW-19 (Class III)Field pH (S.U.)6.78-8.5 NS NA 2/2/2015 6.45 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/I.)2.83 NA 2.91 NA 3.58 NA NA NA 2.82 NA NA 2.23 NA MW-24 (Class III) Cadmium (ug/L)2.5 NS NA 3.31 NA 1.79 NA NS NA NS NA 7/29/2015 1.88 NA NS NA 11/18/2015 3.75 NA Fluoride (mg/I-)0.36 NA 0.397 NA 0.293 NA NA NA 0.388 NA NA 0.372 NA Sulfate (mg/L)2903 NA 2/12/2015 2620 NS NA 2840 NS NA NA NA 2880 NS NA NA 2790 NS 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 HI) Nitrate + Nitrite (as N) (mg/L)5.6 NS NA 3.15 NA 4/20/2015 6.27 KIC NA NS NA NS NA 7/21/2015 7.35 NA NS NA 11/10/2015 5.60 NA Chloride (mg/L)38 NA 44.2 NA 47.6 NA NA NA 43.7 NA NA 42.9 NA Sulfate (mg/L)462 NA 402 XTC NA 429 NA NA NA 425 KTO NA NA 430 NA Field pH (S.U.)6.5 - 8.5 NA z/y/zui D 6.82 IN5 NA 7.09 NA NA NA 6.84 NS NA NA 6.48 NS NA TDS (mg/L)1075 NA 996 NA 1040 NA NA NA 1010 NA NA 1000 NA Gross Alpha minus Rn & U (pCi/L)2 NA <1.0 NA <1.0 NA NA NA <1.0 NA NA <1.0 NA MW-28 (Class III) Chloride (mg/L)105 NS NA 2/9/2015 130 NA 4/21/2015 125 NA NS NA NS NA 7/21/2015 113 NA NS NA 11/10/2015 116 NA Cadmium (ug/L)5.2 NA 4.83 NA 4.59 NA NA NA 4.97 NA NA 4.73 NA Uranium (ug/L) 4.9 NA 4.48 NS NA 6.13 NS NA NA NA 4.87 NS NA NA 4.84 NS 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 MW-29 (Class III) TDS (mg/L)4400 NS NA 4430 NA 4/30/2015 4190 NA NS NA NS NA 7/22/2015 4310 NA NS NA 11/16/2015 4110 NA Sulfate (mg/L) 2946 NA 2/10/2015 NA NS NA 2960 NS NA NA NA NA NS NA NA 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 MW-32 (Class III) Gross Alpha minus Rn & U (pCi/L)3.33 NS NA 2/9/2015 2.19 NA 4/8/2015 1.81 NA NS NA NS NA 7/23/2015 1.89 NA NS NA 11/3/2015 2.19 NS NA Chloride (mg/L)35.39 NA 3/17/2015 36.3 NS NA 37.8 NS NA NA NA 37.3 NS NA NA 34.1 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. Reported from the quarterly chloroform sample Table 1 - GWCL Exceedances for Second Quarter 2016 underthe Auei^t 24, 2012 GWDP Q1 2016 Results Q2 2016 Results Monitoring Well (Water Class) Constituent Exceeding GWCL GWCL in August 24, 2012 GWDP January 2016 Monthly Sample Date January 2016 Monthly Result Q1 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 2016 Result June 2016 Monthly Sample Date June 2016 Monthly Result Sample Frequency Required Quarterly Samp.ling Wells MW-11 (Class II) 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 Quarterly MW-14 (Class III)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 5/4/2016 6.28 6/14/2016 6.24 Quarterly MW-25 (Class HI) Field pH (S.U.)6.5 - 8.5 6.18 2/8/2016 6.50 3/2/2016 6.57 4/12/2016 6.51 6.24 6.25 Quarterly Chloride (mg/L)35 1/19/2016 29.6 31.6 30.9 31.5 5/3/2016 30.8 6/14/2016 31.2 Quarterly Cadmium (ug/L)1.5 1.37 1.51 1.42 1.39 1.43 1.43 Quarterly Uranium (ug/L) 6.5 6.54 6.16 6.22 6.03 6.30 5.99 Quarterly MW-26 (Class HI) Nitrate + Nitrite (as N) (mg/I.)0.62 0.943 1.66 3/2/2016 1.95 4/13/2016 0.990 1.85 1.66 Quarterly Uranium (ug/L)41.8 29.3 30.4 67.7 53.9 39.7 52.7 Quarterly Chloroform (ug/L)70 2370 3530 2280 2060 1720 1860 Quarterly Chloride (mg/L)58.31 1/20/2016 63.5 2/16/2016 69.1 76.8 67.4 5/4/2016 68.1 6/15/2016 81.6 Quarterly Field pH (S.U.)6.74 - 8.5 6.27 5.98 6.35 6.50 6.19 6.29 Quarterly Methylene Chloride (ug/L)5 4.73 8.68 3.93 5.62 3.63 4.12 Quarterly MW-30 (Class II) Nitrate + Nitrite (as N) (mg/L)2.5 14.6 20.0 3/2/2016 17.8 4/13/2016 18 17.3 18.5 Quarterly Chloride (mg/L)128 143 145 142 144 139 142 Quarterly Uranium (ug/L)8.32 8.34 7.76 7.82 7.55 8.18 7.66 Quarterly Field pH (S.U.)6.5 - 8.5 1/20/2016 6.45 2/10/2016 6.94 6.51 6.84 5/4/2016 6.30 6/14/2016 6.28 Quarterly Fluoride (mg/L)0.51 NA 0.360 <10.00 0.359 0.346 0.36 Quarterly Selenium (ug/L)34 41.7 42.5 43.2 41.0 42.5 41.8 Quarterly MW-31 (Class III) Nitrate + Nitrite (as N) (mg/L)5 18.9 18.8 3/2/2016 18.0 4/12/2016 22.8 18.6 6/15/2016 19.2 Quarterly TDS (mg/L)1320 1560 1490 1580 1710 1550 1580 Quarterly Chloride (mg/L)143 228 246 228 254 243 252 Quarterly Selenium (ug/L)71 85.1 81.0 85.7 81.6 5/3/2016 84.6 83.3 Quarterly Field pH (S.U.)6.5 - 8.5 7.04 7.21 6.83 6.93 6.48 7.01 Quarterly Sulfate (mg/L)532 675 631 654 715 699 748 Quarterly MW-35 (Class II) Manganese (ug/L) 200 211 194 3/2/2016 194 4/12/2016 213 203 6/15/2016 228 Quarterly Thallium (ug/1)0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 Quarterly Gross Alpha minus Rn & U (pCi/L)3.75 6.95 2.42 3.88 3.65 3.22 5.39 Quarterly Field pH (S.U.)6.5 - 8.5 1/19/2016 6.35 2/10/2016 6.70 6.53 6.51 5/3/2016 6.22 6.20 Quarterly Selenium (ug/L)12.5 8.62 14.4 20.2 9.2 12.9 6.18 Quarterly Uranium (ug/L)7.5 21.1 20.8 21.8 19.9 21.2 19.4 Quarterly Required Semi-Annual Sampling Wells MW-01 (Class II) Chloride (mg/L)22.1 NA 22.1 NS NA NS NA 4/20/2016 22.0 NS NA Semi-Annually Field pH (S.U.)6.77 - 8.5 NS NA 2/10/2016 7.06 NA NA 6.36 NA Semi-Annually Sulfate (mg/L) 838 NA 812 NA NA 825 NA Semi-Annually MW-03 (Class III) Selenium (ug/L)37 NA <5.00 NS NA NS NA <5.00 NA Semi-Annually Field pH (S.U.)6.5 - 8.5 NA 6.21 NA NA 6.15 NA Semi-Annually Beryllium (ug/L)2 NA 0.694 NA NA 0.625 NA Semi-Annually Cadmium (ug/L) 4.67 NA 3.71 NA NA 4.71 NA Semi-Annually Zinc (ug/L)173.19 NS NA 'it i z/'id i e. 4210 NA NA 2580 MC NA Semi-Annually Thallium (ug/1)1.6 NA z/ lo/zUlo 1.46 NA NA 4/ZO/zUlO 1.54 l\c> NA Semi-Annually Sulfate (mg/L)3663 NA 3230 NA NA 3350 NA Semi-Annually Nitrate + Nitrite (as N) (mg/L)0.73 NA <0.100 NA NA <0.100 NA Semi-Annually Tetrahydrofuran (ug/L)23 NA 11.6 NA NA 36.1 NA Semi-Annually Manganese (ug/L)4233 NA 2820 NA NA 4560 NA Semi-Annually Fluoride (mg/L)0.68 NA 1.33 NA NA 1.13 NA Semi-Annually MW-03A (Class III) Field pH (S.U.)6.5 - 8.5 NA 9/1 A/On i f. 7.08 NS NA NS NA 4/27/2016 6.43 NS NA Semi-Annually Sulfate (mg/L) 3640 INo NA Z/ 10/ZUIO 3580 NA NA 3580 NA Semi-Annually Selenium (ug/L)89 NA 91.5 NA NA 103 NA Semi-Annually MW-05 (Class II)Uranium (ug/L)7.5 NS NA 2/15/2016 1.15 NS NA NS NA 4/21/2016 0.869 NS NA Semi-Annually MW iCXav* im Selenium (ug/L)25 MC NA T/zi/On IK 23.8 NS NA NS NA 31.2 NS NA Semi-Annually iviw- iz ^v-iass iii)Field pH (S.U.)6.5 - 8.5 1N5 NA Z/4/ZUIO 6.36 NA NA 4/zI/zUlO 6.31 NA Semi-Annually MW 1 S III)Selenium (ug/L)128.7 NS NA 2/4/2016 123 NS NA NS NA 4/27/2016 126 NS NA Semi-Annually ivi w -1 j i\,iass in)Field pH (S.U.)6.62 - 8.5 NA 6.30 NA NA 6.02 NA Semi-Annually Q12016 Results Q2 2016 Results Monitoring Well (Water Class) Constituent Exceeding GWCL GWCL in August 24, 2012 GWDP January 2016 Monthly Sample Date January 2016 Monthly Result Q1 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 2016 Result June 2016 Monthly Sample Date June 2016 Monthly Result Sample Frequency Required Semi-Annual Sampling Wells, continued Thallium (ug/1)1.95 NA 2.67 NA NA 2.77 NA Semi-Annually MW-18 (Class III)Sulfate (mg/L)1938.9 NA 1890 NA NA 1890 NA Semi-Annually Field pH (S.U.)6.25-8.5 NS NA 2/9/2016 6.10 NS NA NS NA 4/19/2016 5.93 NS NA Semi-Annually TDS (mg/L)3198.77 NA 3130 NA NA 3190 NA Semi-Annually MW-19 (Class HI)Field pH (S.U.)6.78-8.5 NS NA 2/9/2016 6.76 NS NA NS NA 4/19/2016 6.25 NS NA Semi-Annually Nitrate + Nitrite (as N) (mg/L)2.83 NA 2.44 NA NA 2.63 NA .Semi-Annually Cadmium (ug/L)2.5 NA 6.31 NA NA 6.07 NA Semi-Annually Fluoride (mg/L)0.36 NA 0.117 NA NA 0.446 NA Semi-Annually MW-24 (Class III)Sulfate (mg/L) 2903 NS NA 2/17/2016 2750 NS NA NS NA 4/28/2016 2760 NS NA Semi-Annually Thallium (ug/L)1 NA 2.04 NA NA 2.10 NA Semi-Annually Field pH (S.U.)6.5 - 8.5 NA 5.95 NA NA 4.83 NA Semi-Annually Nitrate + Nitrite (as N) (mg/L)5.6 NA 6.50 NA NA 7.40 NA Semi-Annually Chloride (mg/L)38 NA 47.3 NA NA 43.1 NA Semi-Annually MW-27 (Class III)Sulfate (mg/L)462 KTC NA inncwfx 439 XTO NA NA 418 NA Semi-Annually Field pH (S.U.)6.5 - 8.5 INo NA z/z/zu i n 6.59 NA INo NA 4/ZU/ZUlO 6.54 INo NA Semi-Annually TDS (mg/L)1075 NA 1050 NA NA 1020 NA Semi-Annually Gross Alpha minus Rn & U (pCi/L)2 NA <1.0 NA NA <1.0 NA Semi-Annually Chloride (mg/L)105 NA 130 NA NA 121 NA Semi-Annually Cadmium (ug/L)5.2 NA 5.26 NA NA 4.90 NA Semi-Annually MW-28 (Class III)Uranium (ug/L) 4.9 NS NA 2/2/2016 4.61 NS NA NS NA 4/20/2016 3.95 NS NA Semi-Annually Vanadium (ug/L)30 NA <15.0 NA NA <15.0 NA Semi-Annually Field pH (S.U.)6.1 - 8.5 NA 5.46 NA NA 5.73 NA Semi-Annually TDS (mg/L) 4400 NA 4410 NA NA 4100 NA Semi-Annually MW-29 (Class III)Sulfate (mg/L) 2946 NS NA 2/10/2016 2710 NS NA NS NA 4/27/2016 2730 NS NA Semi-Annually Field pH (S.U.) 6.46 - 8.5 NA 6.47 NA NA 6.03 NA Semi-Annually Gross Alpha minus Rn & U (pCi/L)3.33 NA 2.17 NA NA 2.18 NA Semi-Annually MW-32 (Class HI)Chloride (mg/L) 35.39 NS NA 2/3/2016 38.2 NS NA NS NA 4/20/2016 36.3 NS NA Semi-Annually Field pH (S.U.) 6.4 - 8.5 NA 5.99 NA NA 6.06 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.