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HomeMy WebLinkAboutDRC-2013-003523 - 0901a068803d6d85MENERGY FUELS II DRC-2013-003523 Energy Fuels Resources (USA) Inc. 225 Union Blvd. Suite 600 Lakewood, CO, US, 80228 303 974 2140 www.energvfuels.com November 15, 2013 VIA PDF AND FEDEX Rusty Lundberg, Director, Division of Radiation Control Utah Department of Environmental Quality 195 North 1950 West P.O. Box 144850 Salt Lake City, UT 84114-4850 Re: State of Utah Ground Water Discharge Permit No. UGW370004 White Mesa Uranium Mill - Notice Pursuant to Part I.G.I (a) Dear Mr. Lundberg: The White Mesa Mill (the "Mill") performed third quarter ("Q3") groundwater monitoring during the period from July 1, to September 30, 2013 under the August 24, 2012 version of the Mill's Groundwater Discharge Permit (the "GWDP"). All analytical data needed for comparison to the GWCLs were received during the period ending October 17, 2013. Pursuant to Part I.G.I.a) of the GWDP, (August 24, 2012) please take notice that the concentrations of specific constituents in the monitoring wells highlighted in yellow and bold italics in the columns for this quarter in the attached Table 1 exceeded their respective GWCLs. For ease of review, Table 1 has been formatted to simplify the tracking of any continued exceedances from one monitoring period to the next by charting ongoing monitoring of the same well in the same row, and by highlighting exceedances (in color and bold italics). Part I.G. 1 c) of the GWDP states "that the Permittee shall prepare and submit within 30 calendar days to the Executive Secretary a plan and a time schedule for assessment of the sources, extent and potential dispersion of the contamination, and an evaluation of potential remedial action to restore and maintain groundwater quality to ensure that Permit limits will not be exceeded at the compliance monitoring point and that DMT or BAT will be reestablished." The summary below relating to Q3 2013 exceedances includes, for each exceedance, a brief discussion of whether such a plan and schedule is or is not required or appropriate at this time in light of other actions currently being undertaken by Energy Fuels Resources (USA) Inc. ("EFRI") or in light of other reports submitted by EFRI, and as determined by Division of Radiation Control ("DRC") Staff. A description of the other actions and reports which have affected the requirement to submit a plan and time schedule are as follows: 1. Nitrate + nitrite and chloride in monitoring wells at the site have been the subject of ongoing investigations at the Mill. Based on the results of the previous investigations, EFRI and the Director acknowledge that it has not been possible to date to determine the source(s), cause(s), attribution, magnitudes of contribution, and proportion(s) of the local nitrate + nitrite and chloride in groundwater. EFRI submitted a Corrective Action Plan ("CAP") in February 2012 for nitrate + nitrite and chloride in groundwater. The CAP was approved on December 12, 2012 and the activities associated with the CAP are on-going. Based on information provided by DRC in Letter to Mr. Rusty Lundberg November 15, 2013 Page 2 teleconferences on April 27, and May 2, 2011, due to the ongoing activities and actions, the 30- day plan and schedule for assessment is not required for nitrate + nitrite and chloride exceedances at this time. 2. As discussed in previous quarterly groundwater sampling reports, the background levels and GWCLs for pH were established based on eight or more quarters of laboratory data, which are historically higher than field data. EFRI's letter to the Director dated January 31, 2011 proposed the recalculation of the GWCLs for field pH. Following the statistical evaluation of pH data by EFRI's geochemical consultant, INTERA, Inc., EFRI compared the Mill's groundwater pH data from Q2 2011 and noted that all of the June 2011 groundwater results, and many of the other results from Q2 2011, were already outside the revised GWCLs that were to be proposed in the June 30, 2011 letter. Pursuant to teleconferences with DRC on December 5, and December 19, 2011, EFRI submitted a Work Plan and Schedule on January 20, 2012 and a revised plan based on DRC comments on April 13, 2012. Based on the approved Work Plan and Time Schedule, EFRI and DRC entered into a Stipulated Consent Agreement ("SCA") dated July 12, 2012. The SCA required the completion of the pH Report and the Pyrite Investigation and associated report. The pH Report and Pyrite Investigation Report were submitted November 9, 2012 and December 7, 2012 respectively. By letter dated April 25, 2013, DRC accepted the conclusions that the out- of-compliance results for pH are due to background effects within the aquifer matrix and are not caused by Mill activities. DRC also approved the recalculation of the GWCLs. As a result, the 30-day plan and schedule for assessment is not required for field pH exceedances. 3. A Plan and Time Schedule will not be prepared for monitoring wells with two successive exceedances in Q3 2013 if successive exceedances were reported in a previous quarter and were included in the Source Assessment Reports ("SARs"), submitted October 10, 2012, May 8, 2013, and August 30, 2013. A Plan and Time Schedule will not be submitted for those constituents covered by the October 10, 2012 May 8, 2013, and August 30, 2013 SARs, because the conclusions and actions delineated in those reports were accepted by DRC as documented in DRC correspondence dated April 25, 2013, July 23, 2013, and September 17, 2013 respectively. 4. Chloroform and methylene chloride are the subject of the ongoing chloroform pumping program and are covered by State of Utah Notice of Violation ("NOV") and Groundwater Corrective Action Order ("CAO") State of Utah Department of Environmental Quality ("UDEQ") Docket No. UGW-20-01. As a result, the 30-day plan and schedule for assessment of chloroform and methylene chloride exceedances is not required. It is important to note that under the GWDP, GWCLs have been determined on a well-by-well basis to reflect background groundwater quality, as defined by the mean plus second standard deviation concentration, or the equivalent. Accordingly, the GWDP requires that constituent concentrations in each monitoring well shall not exceed the GWCLs set out in Table 2 of the GWDP. It should be noted that, because the GWCLs have been set at the mean plus second standard deviation, or the equivalent, un- impacted groundwater would normally be expected to exceed the GWCLs approximately 2.5% of the time. Therefore, exceedances are expected in approximately 2.5% of all sample results, and do not necessarily represent impacts to groundwater from Mill operations. In fact, more frequent sampling of a given analyte will increase the number of exceedances due to statistical variation and not due to Mill activity. Additionally, given the slow velocity of groundwater movement, accelerated sampling at a monthly frequency can result in resampling of essentially the same water and can lead to repeat exceedances for accelerated constituents not due to Mill activities, but due to repeat sampling of the same water. 1m* txii Letter to Mr. Rusty Lundberg November 15, 2013 Page 3 1.0 Exceedances in Required Quarterly Sampling Wells 1.1 Quarterly Wells with Two Successive Exceedances As indicated in the attached Table 1, the analytes discussed below exceeded their respective GWCLs for two successive sampling periods in Q3 2013. A 30-day plan and schedule contemplated in Part I.G.I c) of the GWDP will not be required for the consecutive exceedances below for the reasons stated below. One-time exceedances and non-successive exceedances are noted on Table 1, but not listed below. Consecutive exceedances which occurred in previous reporting periods are discussed in the SARs submitted to DRC on October 10,2012, May 8, 2013, and August 30,2013. MW-11 • Manganese concentrations exceeded the GWCL in MW-11 in all of the Q3 2013 sampling events. This consecutive exceedance is addressed in the SAR, dated October 10, 2012. As a result of the SAR, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive exceedance is not necessary and will not be submitted. Until such time as the new GWCLs become effective, the exceedances will continue to be noted and reported. MW-26 • Nitrate + nitrite has exceeded its GWCL in all of the Q3 2013 sampling events. As mentioned above, a CAP has been submitted and approved and the specified actions are currently being implemented; therefore a plan to address this consecutive exceedance is not necessary and is not being submitted. • Chloroform has exceeded its GWCL for all of the monitoring periods for Q3 2013. MW-26 is used as a pumping well for the ongoing chloroform capture program and is expected to yield increased concentrations of chloroform. Because this well is used in the chloroform capture program which is the subject of separate investigations and actions, a plan and time schedule to address the consecutive exceedances is not necessary and is not being submitted. • Methylene chloride has exceeded its GWCL for all of the monitoring periods for Q3 2013. MW- 26 is used as a pumping well for the ongoing chloroform capture program and is expected to yield increased concentrations of methylene chloride. Because this well is used in the chloroform capture program which is the subject of separate investigations and actions, a plan and time schedule to address the consecutive exceedances is not necessary and is not being submitted. MW-26 Note: As stated in the September 2009 Statement of Basis (page 23) in support of the January 20, 2010 revisions to the GWDP, "[i]t should be noted that, because MW-26 is a pumping well for chloroform removal, concentrations of all constituents in that well are subject to potential variation over time as a result of the pumping activity. This will be taken into account by the Executive Secretary in determining compliance for this well." Based on information provided by DRC in teleconferences on April 27, and May 2, 2011, due to the current pumping status as part of the chloroform investigation program, the 30-day plan and schedule for assessment is not required at this time for exceedances of chloroform and methylene chloride in MW-26. • The uranium concentration exceeded its GWCL in the Q3 (July) and August monthly sampling events. This consecutive exceedance is addressed in the SAR, dated October 10, 2012. As a ' Baxerrvas Letter to Mr. Rusty Lundberg November 15, 2013 Page 4 result of the SAR, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive exceedance is not necessary and will not be submitted. Until such time as the new GWCLs become effective, the exceedances will continue to be noted and reported. • The chloride concentration exceeded its GWCL in all of the monitoring periods for Q3 2013. As mentioned above, a CAP has been submitted and approved to address nitrate+nitrite contamination which is expected to address chloride in groundwater. The actions specified in the CAP are currently being implemented; therefore a plan to address this consecutive exceedance is not necessary and is not being submitted. • Field pH has been slightly outside (slightly lower than) the GWCL in the Q3 (July) and the September monthly sampling events. As mentioned above, site-wide pH issues and trends are addressed in reports submitted on November 9, 2012 and December 7, 2012. As a result of the November 7, 2012 report, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive exceedance is not necessary and will not be submitted. Until such time as the new GWCLs become effective, the exceedances will continue to be noted and reported. MW-30 • Nitrate + nitrite has exceeded its GWCL in all of the Q3 2013 sampling events. As mentioned above, a CAP has been submitted and approved and the specified actions are currently being implemented; therefore a plan to address this consecutive exceedance is not necessary and is not being submitted. • The selenium concentration exceeded its GWCL in all of the Q3 2013 sampling events. This consecutive exceedance is addressed in the SAR, dated October 10, 2012. As a result of the SAR, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive exceedance is not necessary and will not be submitted. Until such time as the new GWCLs become effective, the exceedances will continue to be noted and reported. MW-31 • Nitrate + nitrite has exceeded its GWCL in all of the Q3 2013 sampling events. As mentioned above, a CAP has been submitted and approved and the specified actions are currently being implemented; therefore a plan to address this consecutive exceedance is not necessary and is not being submitted. • The chloride concentration exceeded its GWCL in all of the monitoring periods for Q3 2013. As mentioned above, a CAP has been submitted and approved to address nitrate+nitrite contamination which is expected to address chloride in groundwater. The actions specified in the CAP are currently being implemented; therefore a plan to address this consecutive exceedance is not necessary and is not being submitted. CF Letter to Mr. Rusty Lundberg November 15, 2013 Page 5 • The sulfate concentration exceeded its GWCL in all sampling events during Q3 2013. This consecutive exceedance is addressed in the SAR, dated October 10, 2012. As a result of the SAR, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive exceedance is not necessary and will not be submitted. Until such time as the new GWCLs become effective, the exceedances will continue to be noted and reported. • The selenium concentration exceeded its GWCL in all of the Q3 2013 sampling events. A Plan and Time Schedule for this consecutive exceedance was submitted on March 14, 2013. DRC approval was received May 30, 2013. EFRI implemented the requirements of the Plan and Time Schedule and submitted a SAR on August 30, 2013 as required. No other plan is necessary at this time. • The Total Dissolved Solids ("TDS") concentration exceeded its GWCL in all of the Q3 2013 sampling events. This consecutive exceedance is addressed in the SAR, dated October 10, 2012. As a result of the SAR, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive exceedance is not necessary and will not be submitted. Until such time as the new GWCLs become effective, the exceedances will continue to be noted and reported. MW-35 • The manganese concentration exceeded the GWCL in MW-35 in all of the Q3 sampling events. A plan and schedule to address the Q3 exceedances is not necessary and is not being submitted because, as discussed in the October 10, 2013 SAR, background has not yet been established for MW-35 and the interim GWCLs for MW-35 have been set at a fraction of the Groundwater Quality Standards pending the determination of background. The background report for MW-35 is scheduled to be submitted after the collection of 8 statistically valid data points for each constituent. Exceedances of the interim GWCLs do not necessarily represent impacts to groundwater from Mill activities. • The uranium concentration exceeded the GWCL in MW-35 in all of the Q3 sampling events. A plan and schedule to address the Q3 exceedances is not necessary and is not being submitted because, as discussed in the October 10, 2013 SAR, background has not yet been established for MW-35 and the interim GWCLs for MW-35 have been set at a fraction of the Groundwater Quality Standards pending the determination of background. The background report for MW-35 is scheduled to be submitted after the collection of 8 statistically valid data points for each constituent. Exceedances of the interim GWCLs do not necessarily represent impacts to groundwater from Mill activities. • The Gross Alpha concentration exceeded the GWCL in MW-35 in all of the Q3 sampling events. A plan and schedule to address the Q3 exceedances is not necessary and is not being submitted because, as discussed in the October 10, 2013 SAR, background has not yet been established for MW-35 and the interim GWCLs for MW-35 have been set at a fraction of the Groundwater Quality Standards pending the determination of background. The background report for MW-35 is scheduled to be submitted after the collection of 8 statistically valid data points for each constituent. Exceedances of the interim GWCLs do not necessarily represent impacts to groundwater from Mill activities. Letter to Mr. Rusty Lundberg November 15, 2013 Page 6 1.2 Quarterly Wells with New Exceedances Reported in Q3 One new exceedance for the Q3 2013 quarterly well sampling program is listed below. This exceedance will result in an accelerated sampling frequency from quarterly to monthly. It is important to note that the wells listed below will only be sampled during the monthly events for those constituents which exceeded the GWCLs. The well listed below will be sampled for all constituents listed in the GWDP during the quarterly events as that is the regularly scheduled sampling for the quarterly wells. • Fluoride in MW-25 was slightly above the GWCL in the Q3 (July) sampling event. Relative to accelerated reporting requirements, based on phone conversations with DRC on April 5, 2010, reporting of exceedances is required to be completed within 30 days of receipt of the last data package for a quarterly monitoring event. Similarly, accelerated monitoring is required to commence the month following the submission of the Exceedance Notice for a specified quarter for wells that are being accelerated from quarterly to monthly and the quarter following the submission of the Exceedance Notice for wells that are being accelerated from semiannually to quarterly. Per teleconferences with DRC, EFRI proposed modified language for the GWDP, Part l.G.l on May 25, 2012, to document DRC concurrence with the accelerated reporting and monitoring agreements resulting from the April 5, 2012 teleconference. 2.0 Exceedances in Semiannual Sampling Wells Accelerated to Quarterly 2.1 Semi-annual Wells with Two Successive Exceedances As indicated in the attached Table 1, the analytes discussed below exceeded their respective GWCLs for two successive sampling periods (Q2 2013 and Q3 2013). MW-1 • Sulfate has exceeded the GWCL for both the Q2 2013 sampling event and the Q3 2013 sampling event. This is the first consecutive exceedance for sulfate in MW-1. Therefore, a plan and schedule for assessment will be submitted under separate cover within 30 days of this Exceedance Notice. MW-3 • Selenium has exceeded the GWCL for both the Q2 2013 sampling event and the Q3 2013 sampling event. This consecutive exceedance is addressed in the SAR, dated October 10, 2012. As a result of the SAR, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive exceedance is not necessary and will not be submitted. Until such time as the new GWCLs become effective, the exceedances will continue to be noted and reported. • Fluoride has exceeded the GWCL for both the Q2 2013 sampling event and the Q3 2013 sampling event. This consecutive exceedance is addressed in the SAR, dated October 10, 2012. As a result of the SAR, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive exceedance is not necessary and will not be submitted. Until such time as the new GWCLs become effective, the exceedances will continue to be noted and reported. OF Letter to Mr. Rusty Lundberg November 15, 2013 Page 7 MW-3A • TDS has exceeded the GWCL for both the Q2 2013 sampling event and the Q3 2013 sampling event. This is the first consecutive exceedance for TDS in MW-3. Therefore, a plan and schedule for assessment will be submitted under separate cover within 30 days of this Exceedance Notice. MW-18 • Thallium has exceeded the GWCL for both the Q2 2013 sampling event and the Q3 2013 sampling event. This consecutive exceedance is addressed in the SAR, dated October 10, 2012. In the October 10,2012 SAR, EFRI requested the removal of GWCLs for the far upgradient wells (MW-1, MW-18, and MW-19) at the Mill which cannot be impacted by Mill activities. In correspondence dated April 25, 2013, DRC noted "DRC agrees with the justification provided by EFR, that far upgradient wells are not likely to be impacted by current Mill activities..." and has recommended the removal of GWCLs for MW-18 from the next revision of the GWDP. A plan and schedule is not necessary because the exceedance is not caused by Mill activities. Until such time as the GWCLs are removed, the exceedances will continue to be noted and reported. MW-19 • Nitrate + Nitrite have has exceeded the GWCL for both the Q2 2013 sampling event and the Q3 2013 sampling event. This consecutive exceedance is addressed in the SAR, dated October 10, 2012. As mentioned above, a CAP has been submitted and approved and the specified actions are currently being implemented; therefore a plan to address this consecutive exceedance is not necessary and is not being submitted. MW-27 • Nitrate + Nitrite have exceeded the GWCL for both the Q2 2013 sampling event and the Q3 2013 sampling event and during previous quarters. As mentioned above, a CAP has been submitted and approved and the specified actions are currently being implemented; therefore a plan to address this consecutive exceedance is not necessary and is not being submitted. • The chloride concentration exceeded its GWCL for both the Q2 2013 sampling event and the Q3 2013 sampling event and during previous quarters. As mentioned above, a CAP has been submitted and approved to address nitrate+nitrite contamination which is expected to address chloride in groundwater. The actions specified in the CAP are currently being implemented; therefore a plan to address this consecutive exceedance is not necessary and is not being submitted. • TDS has exceeded the GWCL for both the Q2 2013 sampling event and the Q3 2013 sampling event. This consecutive exceedance is addressed in the SAR, dated October 10, 2012. As a result of the SAR, the GWCLs have been recalculated and accepted by DRC. The recalculated GWCLs will become effective upon their publication in the next revision of the GWDP. As a result of DRC's acceptance of the recalculated GWCLs, a plan and schedule to address this consecutive exceedance is not necessary and will not be submitted. Until such time as the new GWCLs become effective, the exceedances will continue to be noted and reported. Letter to Mr. Rusty Lundberg November 15, 2013 Page 8 MW-32 • Gross Alpha has exceeded the GWCL for both the Q2 2013 sampling event and the Q3 2013 sampling event. A Plan and Time Schedule for this consecutive exceedance was submitted on September 20, 2013. DRC approved the Plan and Time Schedule by letter dated October 8, 2013. Pursuant to the approved Plan and Time Schedule, A SAR will be submitted on or before January 14, 2014. No other plan is necessary at this time. 2.1 Semi-annual Wells with New Exceedances Reported in Q3 There were no new exceedances for the semi-annual well sampling program. If you have any questions or require any further information, please contact the undersigned. Yours truly. Kathy Weinel Quality Assurance Manager cc: David Frydenlund Harold Roberts David Turk Dan Hillsten Jo Ann Tischler Table 1 - GWCL Kxceedances tor Third Quarter 2013 under the August 24. 2012 GWDP Ql 2010 Results Q2 2010 Results Q3 2010 Results Q4 2010 Results Monitoring Well (Water Class) Constituent Exceeding GWCL GWCL in August 24,2012 GWDP Ql 2010 Sample Date Ql 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 Wells MW-11 (Class II) Field pH (S.U.) Manganese (ug/L) 6.5 - 8.5 131.29 2/10/2010 7.34 134 4/28/2010 7.22 137 5/24/2010 7.29 122 6/16/2010 99 7/20/2010 7.51 123 8/25/2010 7.32 138 9/8/2010 8.34 128 10/20/2010 7.49 141 11/11/2010 7.44 133 12/15/10 MW-14 (Class III) Manganese (ug/L) 2230.30 Field pH (S.U.) 6.5 - 8.5 2/2/2010 2060 6.45 4/21/2010 2070 6.29 5/21/2010 NA 6.36 6/16/2010 NA 7/20/2010 NA 6.45 7.19 8/25/2010 NA 6.48 9/8/2010 1920 6.51 10/20/2010 NA 6.60 11/10/2010 1980 6.37 12/15/2010 Field pH (S.U.) 6.5 - 8.5 6.53 7.2 NA NA NA NA 6.58 NA 6.36 MW-25 (Class III) Cadmium (ug/L) 1.5 Chloride (mg/L) 2/3/2010 1.26 4/28/2010 .44 NA NA NA NA NS NA NS NA NS NA NA 9/8/2010 1.4 NA NS NA 11/10/2010 .26 Fluoride (mg/L) 0.42 0.31 0.33 NA NA NA NA 0.34 NA Uranium 6.5 5.93 6.43 NA NA NA NA 6.57 NA NS Nitrate + Nitrite (as N) (mg/L) 0.62 1.3 0.3 0.4 0.6 0.6 0.7 0.4 0.2 Uranium (ug/L) 41.8 58.7 66.7 37.4 36.6 34.4 71.8 72.7 37.5 30.4 Chloroform (ug/L) 70 700 1700 800 940 900 2800 2100 1000 1900 MW-26 (Class III) Chloride (mg/L) 58.31 2/2/2010 72 4/22/2010 57 5/21/2010 80 6/16/2010 47 7/21/2010 8/16/2010 49 9/26/2010 64 10/20/2010 11/15/2010 48 Field pH (S.U.) 6.74 - 8.5 6.59 7.18 6.36 6.45 6.39 6.60 6.61 6.49 Dichloromethane (Methylene Chloride) (ug/L) 9.9 NR 2.2 12 24 45 5.5 16 12/15/2010 Nitrate + Nitrite (as N) (mg/L) 2.5 16.1 15.8 17 15.3 7/21/2010 16 8/24/2010 16 15 15 15 MW-30 (Class II) Chloride (mg/L) 128 2/9/2010 127 4/27/2010 97 5/21/2010 NS 6/15/2010 NS NS NS NS NS 9/14/2010 111 10/19/2010 NS 1/9/2010 126 Uranium (ug/L) 8.32 6.82 6.82 NS NS NS NS NS NS 7.10 NS 6.64 Selenium (ug/L) 34 32 35.3 NS NS 7/27/2010 33.5 8/24/2010 35.6 32.6 32.4 12/14/2010 Nitrate + Nitrite (as N) (mg/L) 21.7 22.5 5/21/2010 23 6/15/2010 21.1 7/21/2010 20 8/24/2010 22 21 10/19/2010 20 20 TDS (mg/L) 1320 1150 1220 NS NA NS NA NS NA NS NA 1330 NS NA 1320 MW-31 (Class III) Chloride (mg/L) 143 2/9/2010 128 4/20/2010 128 NS NA NS NA NS NA NS NA Selenium (ug/L) 60.8 59.6 NS NA NS NA NS NA NS NA 9/13/2010 (9/21/10) 139 NS NA 1/9/2010 138 64.4 NS NA 60 Field pH (S.U.) 6.5 - 8.5 6.96 7.38 5/21/2010 6.95 6/15/2010 7.01 7/21/2010 7.80 8/24/2010 7.10 7.66 (7.13) 10/19/2010 6.92 Sulfate (mg/L) 532 507 522 NS NA NS NA NS NA NS NA 527 NS NA 539 12/14/2010 Manganese (ug/L) 200 NA NA NA NA NA NA NA NA 698 Thallium (ug/l) 0.5 NA NA NA NA NA NA NA NA 1.14 Molybdenum (ug/L) 10 NA NA NA NA NA NA NA NA <10 MW-35 (Class II) Gross Alpha minus Rn & U (pCi/L) 3.75 NS NA NS NA NS NA NS NA NS NA NS NA NS NA NS NA 1/30/2010 2.6 Selenium (ug/L) 12.5 NA NA NA NA NA NA NA NA ND Uranium (ug/L) 7.5 NA NA NA NA NA NA NA 27.2 NS Required Semi-Annual Sampling Wells MW-01 (Class II) Manganese (ug/L) Tetrahydrofuran (ug/L) Sulfate (mg/L) 289 11.5 838 NS NA NA NA 5/5/2010 212 7.8 805 NS NA NA NA NS NA NA NA NS NA NA NA NS NA NA NA NS NA NA NA NS NA NA NA 11/18/2010 275 10.7 792 NS Selenium (ug/L) 37 NA 37.2 NA NA NA NA NA 38.8 MW-03 (Class III) Field pH (S.U.) 6.5 - 8.5 NS NA 5/3/2010 6.14(6.25) NS NA NS NA NS NA NS NA 9/20/2010 6.39 NS NA 11/19/2010 6.35 Fluoride (Mg/L) 0.68 NA 0.71 NA NA NA NA 0.63 NA 0.77 NS Field pH (S.U.) 6.5 - 8.5 NA MW-3A (Class III) Sulfate (mg/L) 3640 NA Nitrate + Nitrite (as N) (mg/L) 1.3 NS NA 5/4/2010 TDS (mg/L) 5805 NA Selenium (ug/L) NA 6.23 (6.24) NA NA NA NA 6.42 NA 6.21 3680 NA NA NA NA 3630 NA 3850 NS NA NS NA NS NA NS NA 9/21/2010 NA NS NA 11/22/2010 1.2 5860 NA NA NA NA 5470 NA 5330 81.4 NA NA NA NA NS NA 94.8 NS 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 1/11/2010 11.6 NS MW-12 (Class III) Field pH (S.U.) 6.5 - 8.5 Selenium (ug/l.) 25 NS NA NA 4/27/2010 7.16 25.7 NS NA NA NS NA NA NS NA NA NS NA NA 9/20/2010 6.62 31.9 NS NA NA I /19/2010 6.47 27.6 NS MW-15 (Class III) Selenium (ug/L) 128.7 Iron (ug/L) 81.7 NS NA NA 4/21/2010 100 ND NS NA NA NS NA NA NS NA NA NS NA NA NS NA NA NS NA NA l/l 1/2010 99.5 ND NS Thallium (ug/l) 1.95 NA 3.73 NA NA NA 3.64 NA 3.57 MW-18 (Class III) Sulfate (mg/L) 1938.9 Field pH (S.U.) TDS (mg/L) 6.25-8.5 3198.77 NS NA NA NA 5/4/2010 1950 6.2 3280 NS NA NA NA NS NA NA NS NA NA NA NS NA NA NA 9/15/2010 1930 7.23 3190 NS NA NA NA 1/18/2010 1910 6.37 3030 NS Ql 2010 Results Q2 2010 Results Q3 2010 Results Q4 2010 Results —— Monitoring Well (Water Class) Constituent Exceeding GWCL GWCL in Current GWDP Ql Sample Date Ql 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 Required Semi-Annual Sampling Wells, continued MW-19 (Class III) Field pH (S.U.) Gross Alpha minus Rn & U (pCi/L) Nitrate + Nitrite (as N) (mg/L) 6.78-8.5 2.36 2.83 NS NA NA NA 5/4/2010 6.61 (6.66) 0.9 2.6 NS NA NA NA NS NA NA NA NS NA NA NA NS NA NA NA 9/15/2010 6.93 NA NA NS NA NA NA 11/18/2010 6.8 1.2 2.4 NS MW-23 (Class III) Field pH (S.U.) 6.5 - 8.5 Manganese (ug/L) NS NA 550 4/22/2010 6.18 NS NA NS NA NS NA NS NA 9/14/2010 7.05 NS NA 1/22/2010 6.44 NA 184 NA NA NA NA NS NA 65 NS Cadmium (ug/L) 2.5 NA 4.28 NA NA NA NA 5.06 NA 3.22 MW-24 (Class III) Fluoride (Mg/L) 0.36 NA 0.14 NA NA NA NA NA NA Thallium (ug/L) NS NA 5/6/2010 1.3 NS NA NS NA NS NA NS NA 9/21/2010 1.57 NS NA 11/17/2010 1.09 Field pH (S.U.) 6.5 - 8.5 NA 5.91 (5.78) NA NA NA NA 6.64 NA 6.1 NS Nitrate -t- Nitrite (as N) (mg/L) 5.6 NA 5.8 NA NA NA NA 5.9 NA 5.7 Chloride (mg/L) 38 NA 42 NA NA NA NA 42 NA 45 MW-27 (Class III) Sulfate (mg/L) 462 Field pH (S.U.) 6.5-8.5 NS NA NA 5/3/2010 469 6.78 NS NA NA NS NA NA NS NA NA NS NA NA 9/14/2010 461 NS NA NA 11/12/2010 452 6.89 TDS (mg/L) 1075 NA 1160 NA NA NA NA 1060 NA 1110 Gross Alpha minus Rn & U (pCi/L) NA 1.6 NA NA NA NA NA NA 2.4 NS Chloride (mg/L) 105 NA 108 NA NA NA NA 106 NA 107 MW-28 (Class III) Manganese (ug/L) 1837 NS NA 4/19/2010 1550 NS NA NS NA NS NA NS NA 9/14/2010 NA NS NA 11/12/2010 1510 Field pH (S.U.) 6.1-8.5 NA 5.67 NA NA NA NA 5.91 NA 5.72 NS Iron (ug/L) NA 1630 NA NA NA NA NA 1490 Manganese (ug/L) 5624 NA 4820 NA NA NA NA NA 4890 MW-29 (Class III) TDS (mg/L) 4400 NS NA 4/27/2010 4400 NS NA NS NA NS NA NS NA NS NA NS NA 11/9/2010 4390 Field pH (S.U.) 6.46 - 8.5 NA 6.82 NA NA NA NA NA 6.17 NS MW-32 (Class III) Gross Alpha minus Rn & U (pCi/L) 3.33 NA 4.5 NA NA NA NA 2.9 NA 8.8 NS 4/20/2010 NS NS NS NS 9/13/2010 NS 11/10/2010 Field pH (S.U.) 6.4 - 8.5 NA 6.03 NA NA NA NA 6.33 NA 6.05 NS Notes: GWCL values are taken from August 24, 2012 version of GWDP. NS = Not Required and Not Sampled NR = Required and Not Reported NA = Not Applicable Exceedances are shown in yellow Values in () parentheses are the field pH measurements for the resampled analyses. Table 1 - GWCL Exceedances for Third Quarter 2013 under the August 24, 2012 GWDP Ql 2011 Results Q2 2011 Results Q3 2011 Results Q4 2011 Results Monitoring Well (Water Class) Constituent Exceeding GWCL GWCL in August 24, 2012 GWDP January 2011 Monthly Sample Date January 2011 Monthly Sample Result Ql 2011 Sample Date Ql 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 Required Quarterly Sampling Wells MW-11 (Class 11) Field pH (S.U.) Manganese (ug/L) 6.5 - 8.5 131.29 1/11/201. 7.43 121 2/2/201 7.47 145 3/15/2011 7.94 4/4/201 7.50 148 5/10/2011 7.25 170 6/15/2011 121 7/6/2011 7.07 151 8/3/2011 8/30/11 7.25 9/7/2011 7.29 106 10/4/2011 7.52 1/9/2011 7.47 105 12/14/2011 MW-14 (Class III) Manganese (ug/L) 2230.30 Field pH (S.U.) 6.5 - 8.5 1/11/2011 NA 2/7/2011 2020 6.37 6.22 3/14/20L NA 6.76 4/4/201 1140 6.63 5/10/2011 NA 6.37 6/15/2011 NA 5.83 7/5/201 NA 6.4 8/3/2011 1990 6.23 9/8/2011 NA 6.50 10/4/2011 1960 6.71 (6.82) 11/9/2011 NA 6.63 12/12/201: Field pH (S.U.) 6.5 - 8.5 6.44 6.66 6.79 6.7 6.1 5.77 6.29 8/3/2011 8/30/11 6.42 (6.54) 6.54 6.6 6.51 MW-25 (Class III) Cadmium (ug/L) 1.5 NA Chloride (mg/L) 35 1/11/2011 NA 2/2/2011 1.34 30 3/15/2011 NA NA 4/4/201 1.27 5/11/2011 NA NA NA NA 6/20/2011 NA 7/6/2011 8/30/2012 1.19 NA 32 9/7/2011 NA NA 10/4/2011 1.27 32 11/9/2011 NA NA 12/12/2011 Fluoride (mg/L) 0.42 NA 0.31 NA 0.28 NA NA NA 8/3/2011 0.31 NA 0.32 NA Uranium 6.5 7.02 4.77 6.8 5.56 6.72 7.06 6.74 6.37 5.96 5.27 6.56 Nitrate + Nitrite (as N) (mg/L) 0.62 0.2 0.25 0.6 0.8 0.4 0.3 0.9 0.6 2.4 0.9 1.3 Uranium (ug/L) 41.8 32 69.3 60.2 57.4 57.1 19.0 56.1 58.9 55.6 Chloroform (ug/L) 70 800 730 1200 390 1900 730 300 1000 1300 440 1200 MW-26 (Class III) Chloride (mg/L) 58.31 1/12/201 52 2/16/2011 59 3/15/2011 64 4/1/201 64 5/10/2011 54 6/20/2011 39 7/6/201 64 8/3/2011 8/30/11 60 9/7/2011 66 10/12/201 61 11/9/2011 55 12/14/2011 Field pH (S.U.) 6.74 - 8.5 6.83 6.06 6.22 6.43 6.52 6.35 6.07 (6.58) 6.71 6.82 6.75 Dichloromethane (Methylene Chloride) (ug/L) <1.0 10 14 3.1 20 2.4 10 7.9 2.6 8.9 MW-30 (Class II) Nitrate + Nitrite (as N) (mg/L) 2.5 15 16 17 16 16 17 17 14 16 16 16 Chloride (mg/L) 128 1/10/201 NS 2/1/2011 134 3/14/2011 NS 4/11/2011 134 5/10/2011 128 6/20/2011 127 7/5/2011 127 8/3/2011 126 9/7/2011 145 10/4/201 129 11/8/2011 122 12/12/2011 Uranium (ug/L) 8.32 NS 5.97 NS 6.49 NS NS NS NS 9.83 NS 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 Nitrate + Nitrite (as N) (mg/L) 19 21 22 21 20 22 22 20 21 21 21 MW-3 1 (Class III) TDS (mg/L) 1320 1240 1220 1250 1370 1290 1330 1280 1300 1300 1320 1290 Chloride (mg/L) 143 1/10/2011 NS 2/1/2011 145 3/14/2011 NS 4/1/2011 143 5/10/2011 143 6/20/2011 145 7/5/201 148 8/2/2011 148 9/6/2011 148 10/3/2011 145 Selenium (ug/L) 71 NS 64.6 NS 65.2 NS NS NS 66.2 NS 11/8/2011 (11/29/12) 145 12/12/2011 NS Field pH (S.U.) 6.5 - 8.5 6.65 7.21 7.43 7.01 6.73 6.16! 6.64 6.67 7.03 7.28 7.01 (7.34) Sulfate (mg/L) 532 NS 538 531 503 512 540 532 537 541 539 552 Manganese (ug/L) 200 NA 248 NA 369 NA NA 348 267 270 271 283 Thallium (ug/l) 0.5 NA < 0.50 NA <0.50 NA NA NA 0.52 NA 0.57 < 0.50 MW-35 (Class II) Molybdenum (ug/L) 10 NA <10 NA <I0 NA NA NA <10 NA <10 NA Gross Alpha minus Rn & U (pCi/L) 3.75 NS NA 2/15/2011 2.6 NS NA 6/7/2011 3.7 NS NA NS NA 7/20/11 NA 8/30/2011 4.5 9/7/11 NA 10/3/11 4.4 11/8/2011 4.7 12/14/11 Selenium (ug/L) 12.5 NA ND NA ND NA NA NA 9.3 NA 10.5 NA Uranium (ug/L) 7.5 NA 12.7 NA 21.7 NA NA 24.2 18.3 22.3 20.1 24 Required Semi-Annual Sampling Wells MW-01 (Class II) Manganese (ug/L) Tetrahydrofuran (ug/L) Sulfate (mg/L) 289 11.5 NS NA NA NA NS NA NA NA NS NA NA NA 4/11/201 4/19/2011 4/11/201 218 10.7 704 NS NA NA NA NS NA NA NA NS NA NA NA NS NA NA NA NS NA NA NA 10/11/2011 206 7.82 713 NS NA NA NA NS MW-03 (Class III) Selenium (ug/L) 37 NA 40.5 NA 45.4 NA NA NA 46 NA 46.7 NA Field pH (S.U.) 6.5 - 8.5 NS NA 2/15/2011 6.09 NS NA 4/13/2011 6.46 NS NA NS NA NS NA 8/10/2011 6.32 NS NA 10/10/201 6.53 (6.83) NS NA NS Fluoride (Mg/L) 0.68 NA 0.69 NA 0.68 NA NA NA 0.96 NA 0.91 NA Field pH (S.U.) 6.5 - 8.5 NA 6.05 NA 6.58 NA NA NA 6.19 NA 6.5 (6.92) NA MW-03A (Class III) Sulfate (mg/L) 3640 NA 3730 NA 3350 NA NA NA 3560 NA 3750 NA Nitrate + Nitrite (as N) (mg/L) 1.3 NS NA 2/16/2011 NA NS NA 4/13/2011 1.2 NS NA NS NA NS NA 8/11/2011 NA NS NA 10/11/201 1.1 NS NA NS TDS (mg/L) 5805 NA 5770 NA 5720 NA NA NA 5810 NA 5630 NA Selenium (ug/L) NA 99 NA 85.8 NA NA NA 88.5 NA 95 NA MW-05 Uranium (ug/L) 7.5 NS NA 2/14/2011 29.5 NS NA 4/12/201 7.16 NS NA NS NA NS NA 8/9/2011 0.5 NS NA 10/10/2011 4.52 NS NA NS MW-12 (Class III) Field pH (S.U.) 6.5 - 8.5 Selenium (ug/L) 25 NS NA NA 2/15/2011 6.43 39 NS NA NA 4/5/201 6.67 21.7 NS NA NA NS NA NA NS NA NA 8/9/2011 6.13 25.4 NS NA NA 10/6/2011 6.7 (6.97) 35.4 NS NA NA NS MW-15 (Class III) Selenium (ug/L) 128.7 Iron (ug/L) 81.7 NS NA NA NS NA NA NS NA NA 4/12/2011 116 <0.50 NS NA NA NS NA NA NS NA NS NA NA NS NA NS NA NA 10/10/2011 137 NS NA NA NS MW-18 (Class III) Thallium (ug/I) 1.95 NA 3.49 NA 3.74 NA NA NA 4.0 3.39 NA 3.83 NA Sulfate (mg/L) 1938.9 Field pH (S.U.) TDS (mg/L) 6.25-8.5 3198.77 NS NA NA NA 2/15/2011 1770 6.27 3250 NS NA NA NA 4/6/2011 1780 6.71 3250 NS NA NA NA NS NA NA NA NS NA NA NA 8/10/201 9/21/11 1910 5.95 3190 NS NA NA NA 10/11/2011 2020 6.55 (6.63) 3220 NS NA NA NA NS Ql 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 Ql 2011 Sample Date Ql2011 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 MW-19 (Class ni) Field pH (S.U.) Gross Alpha minus Rn & U (pCi/L) Nitrate + Nitrite (as N) (mg/L) 6.78-8.5 2.36 2.83 NS NA NA NA 2/21/2011 6.78 NA NS NS NA NA NA 4/5/2011 7.03 0.5 2.6 NS NA NA NA NS NA NA NA NS NA NA NA 7/20/3011 6.65 NA NS NS NA NA NA 10/12/201 6.88 (7.02) 0.6 4.0 NS NA NA NA NS NA NA NA MW-23 (Class III) Field pH (S.U.) 6.5 - 8.5 Manganese (ug/L) 550 NS NA 2/9/2011 6.13 NS NA NA NS 4/5/201 7.14 NS NA NS NA NA 32 NS NA 8/4/2011 6.38 NA NA NS NA 10/6/2011 6.56 (6.77) NS NA NS NA 551 NA NA NS NA NA Cadmium (ug/L) 2.5 NA 2.78 NA 2.61 NA NA NA 1.46 NA .78 MW-24 (Class III) Fluoride (Mg/L) 0.36 NA NA NA 0.19 NA NA NA NA NA 0.36 Thallium (ug/L) NS NA 2/10/2011 1.42 NS NA 4/5/201) 1.07 NS NA NS NA NS NA 8/4/201 <0.50 NS NA 10/11/2011 0.62 NS Field pH (S.U.) 6.5 - 8.5 NA 5.73 NA 6.12 NA NA NA 6.45 NA 6.44 NA NA NA NA NS NA NA NA NA Nitrate + Nitrite (as N) (mg/L) 5.6 NA NA 6.4 NA NA NA NA 6.3 MW-27 (Class III) Chloride (mg/L) 38 NA 46 NA 43 NA NA NA 43 NA 44 Sulfate (mg/L) 462 Field pH (S.U.) 6.5-8.5 NS NA NA 2/9/2011 455 6.71 NS NA NA 4/5/2011 442 6.79 NS NA NA NS NA NA NS NA NA 8/8/201 424 6.39 NS NA NA 10/5/2011 456 7.17 (7.24) NS TDS (mg/L) 1075 NA 1090 NA 1190 NA NA NA 1090 NA 1110 Gross Alpha minus Rn & U (pCi/L) NA 0.7 NA NA NA NA 0.8 NA 1.5 NA NA NA NA NA NA NS NA NA NA NA NA NA Chloride (mg/L) 105 NA 114 NA 109 NA NA NA 105 NA 143 MW-28 (Class m) Manganese (ug/L) 1837 NS NA 2/14/2011 NA NS NA 4/11/2011 1690 NS NA NS NA NS NA 8/8/2011 NA NS NA 10/5/201 1540 NS 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 NA NS NA NA NA Iron (ug/L) 1869 NA NS NA NA 3010 NA NA NA 1080 NA 1220 MW-29 (Class III) Manganese (ug/L) 5624 NA NS NA NA 4900 NA NA NA NA NA 4800 TDS (mg/L) 4400 NS NA NS NA NS NA 4/18/2011 4080 NS NA NS NA NS NA 8/9/2011 NA NS NA 10/5/2011 4280 NS Field pH (S.U.) 6.46 - 8.5 NA NS NA NA 6.45 NA NA NA 6.20 NA 6.52 NA NA NA NA NS NA NA NA NA MW-32 (Class III) Gross Alpha minus Rn & U (pCi/L) 3.33 NA 1.5 NA 4.6 NA NA NA NS 2/9/201 NS 4/1/201 NS NS NS Field pH (S.U.) 6.4-8.5 NA 5.99 NA 6.14 8/2/2011 8/30/11 1.9 NA 3.7 NS 10/3/201 NS NA NA NA 6.10 (6.20) NA 6.35 NA NA NS NA 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. ! Values was below the GWCL. Field pH was monitored, tracked and reported for the required 8 quarters. The constituent was removed from accelerated reporting pursuant to the DRC latter dated 8/28/12. Table 1 - GWCL Exceedances for Third Quarter 2013 under the August 24, 2012 GWDP Ql 2012 Results Q2 2012 Results 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 Ql2012 Sample Date Ql 2012 Result March 2012 Monthly Sample Date March 2012 Monthly Result April 2012 Monthly Sample Date April 2012 Monthly Result Q2 2012 Sample Date Q2 2012 Result June 2012 Monthly Sample Date June 2012 Monthly Result Q3 2012 Sample Date Q3 2012 Result August 2012 Monthly Sample Date August 2012 Monthly Result September 2012 Monthly Sample Date September 2012 Monthly Result October 2012 Monthly Sample Date October 2012 Monthly Result Q4 2012 Sample Date Q4 2012 Result December 2012 Monthly Sample Date December 2012 Monthly Result Required Quarterly Sampling Wells MW-11 (Class II) Field pH (S.U.) Manganese (ug/L) 6.5 - 8.5 131.29 1/26/2012 7.51 102 2/13/2012 7.59 154 3/13/2012 7.47 121 4/10/2012 7.66 132 5/8/2012 7.49 127 6/19/2012 7.82 122 7/11/2012 7.74 135 8/7/2012 7.43 166 9/19/2012 7.91 130 10/23/2012 7.39 161 11/12/2012 7.47 138 12/24/20L 7.46 137 MW-14 (Class III) Manganese (ug/L) 2230.30 Field pH (S.U.) 6.5 - 8.5 1/24/2012 NA 6.36 2/21/2012 1790 6.57 3/14/2012 NA 6.51 4/12/2012 NA 6.97 5/9/2012 2360 6.73 6/19/201 NA 6.90 7/11/2012 2100 8/7/2012 2300 6.58 9/18/2012 2140 10/23/2012 2110 7.08 6.83 11/27/2012 2100 6.52 12/18/2012 1950 6.60 Field pH (S.U.) 6.5 - 8.5 6.63 6.83 6.55 6.58 6.73 6.99 6.55 6.54 6.54 6.47 6.62 MW-25 (Class III) Cadmium (ug/L) 1.5 Chloride (mg/L) 1/25/2012 NA NA 2/14/2012 1.31 30 3/14/2012 NA NA NA 4/9/2012 NA 5/2/2012 1.33 30 6/18/2012 NA NA 7/10/2012 1.24 NA NA 33 8/6/2012 NA 9/18/2012 NA 10/22/2012 NA NA 11/12/2012 1.56 28. 12/24/2012 NA NA Fluoride (mg/L) 0.42 NA 0.34 NA NA 0.32 NA 0.3 NA NA NA 0.298 NA Uranium 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 Nitrate + Nitrite (as N) (mg/L) 0.62 1.9 2/15/2012 1.2 3.4 2.9 2.3 7/11/2012 1.9 1.6 1.8 3.5 0.55 1.46 Uranium (ug/L) 41.8 64.6 2/21/2012 59.4 31.2 42.2 66.0 28.4 67.4 64.9 26.9 56.8 51.3 Chloroform (ug/L) 70 1900 3300 2900 2900 1700 2400 8/16/20L 970 2200 2300 4720 4020 1250 MW-26 (Class III) Chloride (mg/L) 58.31 1/25/2012 68 2/15/2012 40 3/14/2012 74 4/11/2012 82 5/7/2012 6/26/2012 74 6/19/2012 85 ll\ 1/2012 78 8/8/2012 78 9/19/2012 67 10/24/2012 2.62 11/15/2012 52.9 12/24/2012 65.9 Field pH (S.U.) 6.74 - 8.5 6.59 2/15/2012 2/21/2012 6.72 (6.91) (6.71) 6.39 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 Dichloromethane (Methylene Chloride) (ug/L) 13 2/15/2012 24 27 20 10 16 8/16/2012 4.9 17 9.8 15.0 34.6 5.5 Nitrate + Nitrite (as N) (mg/L) 2.5 1/24/2012 17 17 18 17 16 15 17 18 16 16.2 18.5 17.2 MW-30 (Class II) Chloride (mg/L) 128 124 2/14/2012 126 3/14/2012 128 4/10/2012 128 5/2/2012 124 6/18/2012 131 7/10/2012 128 8/7/2012 139 9/19/2012 130 10/23/2012 135 11/13/2012 114 12/26/2012 122 Uranium (ug/L) 8.32 NS NA 7.42 8.38 7.84 6.81 7.8 7.64 8.04 7.67 7.03 Selenium (ug/L) Nitrate + Nitrite (as N) (mg/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 21 21 22 21 20 21.6 21 21 21 18 23.6 22.2 TDS (mg/L) 1320 1360 1240 1400 1380 1410 1460 1400 1400 1460 1320 1230 1270 MW-31 (Class III) Chloride (mg/L) 143 1/24/2012 155 2/13/2012 150 3/13/2012 152 4/9/2012 160 5/2/2012 151 Selenium (ug/L) 71 NS 67.8 NS NS 70.2 6/18/2012 6/29/2012 138 7/9/2012 161 8/6/2012 175 9/18/2012 172 10/22/2012 157 11/6/2012 189 12/18/2012 170 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 Manganese (ug/L) 200 264 253 269 277 258 304 272 273 283 253 241 240 Thallium (ug/l) 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 Molybdenum (ug/L) 10 <10 <10 NA NA <I0 NA <10 NA NA NA 30.4 NA MW-35 (Class II) Gross Alpha minus Rn & U (pCi/L) 3.75 1/24/2012 6.5 2/14/2012 4.1 3/13/2012 6.2 4/10/2012 4.1 5/2/2012 4.5 6/19/2012 4.9 7/10/2012 3.5 8/8/2012 4.2 9/19/2012 5.4 10/23/2012 4.31 1/13/2012 4.23 12/18/2012 6.5 Selenium (ug/L) 12.5 NA 19.7 NA NA 11.4 7.0 15.9 18.8 19.0 15.4 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 MW-01 (Class II) Tetrahydrofuran (ug/L Manganese (ug/L) Sulfate (mg/L) 289 11.5 NS NA NA NA NS NA NA NA NS NA NA NA NS NA NA NA 5/1/2012 176 10.3 659 NS NA NA NA NS NA NA NA NS NA NA NA NS NA NA NA NS NA NA NA 11/27/2012 315 21.8 846 NS NA NA NA Semi-Annually Semi-Annually Semi-Annually Selenium (ug/L) 37 NA 43.1 NA NA 52.8 NA 51.1 NA NA NA 58.9 NA MW-03 (Class III) Field pH (S.U.) 6.5 - 8.5 NS NA 2/29/2012 6.63 NS NA NS NA 5/14/2012 6.67 NS NA 7/18/2012 6.99 NS NA NS NA NS NA 11/28/2012 6.55 NS NA Fluoride (Mg/L) 0.68 NA 0.86 NA NA 1.04 NA 0.96 NA NA NA 1.26 NA MW-03A (Class HI) Field pH (S.U.) 6.5 - 8.5 NA 6.46 NA NA NA 7.01 NA NA NA 6.35 NA Sulfate (mg/L) 3640 NA 3020 NA NA 3220 NA 3700 NA NA NA 2780 NA Nitrate + Nitrite (as N) (mg/L) 1.3 NS NA 3/1/2012 NA NS NA NS NA 5/15/2012 1.1 NS NA 7/19/2012 NA NS NA NS NA NS NA 11/29/2012 1.31 NS NA TDS (mg/L) 5805 NA 5690 NA NA 5730 NA 5720 NA NA NA 5610 NA Selenium (ug/L) 89 NA 65.8 NA NA 85.1 NA 99.3 NA NA NA /// NA MW-05 (Class II) Uranium (ug/L) 7.5 NS NA 2/28/20L 18.6 NS NA NS NA 5/9/2012 1.23 NS NA 7/16/201 0.75 NS NA NS NS NA 11/27/2012 0.402 NS NA MW-12 (Class III) Field pH (S.U.) 6.5 - 8.5 Selenium (ug/L) 25 NS NA NA 2/29/2012 6.81 27.2 NS NA NA NS NA NA 5/10/2012 6.91 19.6 NS NA NA 7/17/2012 6.98 20.7 NS NA NA NS NA NA NS NA NA 11/27/2012 6.54 23 NS NA NA MW-15 (Class III) Selenium (ug/L) 128.7 Iron (ug/L) 81.7 NS NA NA 2/22/201: NA <30 NS NA NA NS NA NA 5/9/2012 152 <30 NS NA NA 7/17/2012 120 <30 NS NA NA NS NA NA NS NA NA 11/14/2012 117 <30 NS NA NA Thallium (ug/l) .95 NA 3.63 NA 3.51 NA 3.73 NA NA 3.2 NA MW-18 (Class III) Sulfate (mg/L) 1938.9 Field pH (S.U.) TDS (mg/L) 6.25-8.5 3198.77 NS NA NA NA 2/27/2012 1920 6.6 3230 NS NA NA NA NS NA NA NA 4/30/2012 1790 6.59 3280 NS NA NA NA 7/18/2012 1900 6.64 3220 NS NA NA NA NS NA NA NA NS NA NA NA 11/26/2012 1210 6.51 3160 NS NA NA NA Ql 2012 Results Q2 2012 Results Q3 2012 Results Q4 2012 Results Monitoring Well (Water Class) Constituent Exceeding GWCL GWCL in Current GWDP January 2012 Monthly Sample Date January 2012 Monthly Result Ql 2012 Sample Date Ql 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 Sample Frequency Required Semi-Annual Sampling Weils, continued MW-19 (Class III) Field pH (S.U.) Gross Alpha minus Rn & U (pCi/L) Nitrate + Nitrite (as N) (mg/L) 6.78-8.5 2.36 2.83 NS NA NA NA 2/28/2012 6.83 NA 3.9 NS NA NA NA NS NA NA NA 5/16/2012 0.9 3.7 NS NA NA NA 7/19/2012 7.21 NA NS NA NA NA NS NA NA NA NS NA NA NA 12/13/2012 6.71 4.86 3.96 NS NA NA NA Semi-Annually Semi-Annua Semi-Annua MW-23 (Class III) Field pH (S.U.) 6.5 - 8.5 Manganese (ug/L) NS NA 550 2/20/2012 6.61 NA NS NA NS NA NA 5/16/2012 6.74 NA NS NA 49 7/17/2012 7.10 NS NA NA NS NA NS NA NA NA 12/5/2012 6.61 NS NA 54.3 NA NA Semi-Annua! Semi-Annua! Cadmium (ug/L) NA 2.25 NA NA 2.01 NA 4.7 NA NA NA 1.35 MW-24 (Class III) Fluoride (Mg/L) 0.36 NA NA NA NA 0.14 NA NA NA NA NA 0.558 Thallium (ug/L) NS NA 2/23/2012 0.96 NS NA NS NA 5/10/2012 0.74 NS NA 7/18/2012 1.36 NS NA NS NA NS NA 11/29/2012 0.666 NS Field pH (S.U.) 6.5 - 8.5 NA 6.03 NA NA 6.21 NA 6.45 NA NA NA 6.01 NA NA NA NA Semi-Annua! Semi-Annua Semi-Annua Semi-Annua Nitrate + Nitrite (as N) (mg/L) 5.6 NA 6.4 NA NA 6.2 NA 6.7 NA NA NA 6.9 Chloride (mg/L) 38 NA 45 NA NA 46 NA 47 NA NA NA 44.2 MW-27 (Class III) Sulfate (mg/L) 462 Field pH (S.U.) 6.5-8.5 NS NA NA 2/28/2012 451 7.24 NS NA NA NS NA NA 5/1/2012 446 7.03 NS NA NA 7/16/2012 453 7.40 NS NA NA NS NA NA NS NA NA 11/13/2012 451 6.69 NS TDS (mg/L) 1075 NA 1140 NA NA 1170 NA 1150 NA NA NA 1070 Gross Alpha minus Rn & U (pCi/L) NA 2.3 NA NA 0.8 NA NA NA NA .33 NA NA NA NA NA NA Semi-Annua Semi-Annua! Semi-Annua Semi-Annua Semi-Annua! Semi-Annua! Chloride (mg/L) 105 NA 109 NA NA 114 NA 7/16/2012 105 NA NA NA 115 MW-28 (Class III) Manganese (ug/L) 1837 NS NA 2/28/2012 NA NS NA NS NA 5/8/2012 1850 NS NA 8/1/2012 1660 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) NS NA NS NA NS NA 11/14/20L 1680 NS NA NA NA 5.98 NA NA NA Semi-Annua! Semi-Annua Semi-Annua Iron (ug/L) 1869 NA 1310 NA NA 1400 NA 7/16/2012 1270 NA NA NA 1350 Manganese (ug/L) 5624 NA NA NA NA 6140 NA 8/1/2012 5190 NA NA NA 5040 MW-29 (Class III) TDS (mg/L) 4400 NS NA 2/22/2012 NA NS NA NS NA 5/8/201; 4600 NS NA 8/1/2012 4420 NS NA NS NA NS NA 11/14/2012 4430 NS 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 NA NA NA Semi-Annua Semi-Annua Semi-Annua Semi-Annua MW-32 (Class III) Gross Alpha minus Rn & U (pCi/L) NA NA NA 2.4 NA NA NA NA 2.97 NS 2/21/2012 NS NS 4/30/2012 NS 7/9/2012 NS NS NS 11/6/2012 NS Field pH (S.U.) 6.4 - 8.5 NA 6.57 NA NA 6.40 NA 6.72 NA NA NA 6.23 NA NA Semi-Annua 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. Table 1 - GWCL Exceedances for Third Quarter 2013 under the August 24, 2012 GWDP Ql 2013 Results Q2 2013 Results Q3 2013 Results Monitoring Well (Water Class) Constituent Exceeding GWCL GWCL in August 24, 2012 GWDP January 2013 Monthly Sample Date January 2013 Monthly Result Ql 2013 Sample Date Ql 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 Sample Frequency Required Quarterly Sampling Wells MW-11 (Class II) Field pH (S.U.) Manganese (ug/L) 6.5 - 8.5 131.29 1/23/2013 7.45 115 2/20/2013 7.46 139 3/20/2013 7.33 164 4/16/2013 6.17 181 5/14/2013 144 6/25/2013 7.47 135 7/10/2013 7.40 138 8/20/2013 7.7 158 9/18/2013 7.39 134 Quarterly Quarterly MW-14 (Class III) Manganese (ug/L) 2230.30 Field pH (S.U.) 6.5 - 8.5 1/23/2013 1930 6.48 2/26/2013 2250 6.52 3/20/2013 2110 6.48 4/16/2013 2060 7.58 5/14/2013 2200 7.39 6/25/2013 1990 6.54 7/11/2013 2100 6.47 8/20/2013 2100 9/19/2013 2190 6.48 Quarterly Quarterly Field pH (S.U.) 6.5 - 8.5 6.65 6.62 6.41 7.00 7.19 6.61 6.32 6.74 6.54 MW-25 (Class III) Cadmium (ug/L) 1.5 NA Chloride (mg/L) 35 1/22/2013 NA 2/20/2013 1.35 36.1 3/19/2013 1.40 NA 4/17/2013 1.36 NA 5/14/2013 1.52 28.1 6/24/2013 1.31 30.4 7/10/2013 1.41 28.0 8/19/2013 1.57 1.31 31.1 9/17/2013 29.6 Fluoride (mg/L) 0.42 NA 0.32 NA NA 0.392 NA 0.534 NA NA Uranium 6.5 5.97 5.39 5.56 5.35 6.22 6.42 5.99 Quarterly Quarterly Quarterly Quarterly Quarterly Nitrate + Nitrite (as N) (mg/L) 0.62 1.66 1.38 1.61 1.73 2.01 3.042.11* 1.98 1.77 3.60 Uranium (ug/L) 41.8 65.7 57.8 69 58.8 64.3 71.3 70 72.3 19.9 Chloroform (ug/L) 70 1270 1500 1340 1680 1210 4030* 2410 2110 4170 MW-26 (Class III) Chloride (mg/L) 58.31 1/24/2013 63.5 2/20/2013 77 3/20/2013 73.6 4/17/2013 70.4 5/23/2013 63.1 6/5/2013 6/25/2013 87.8 77.9* 7/11/2013 72.1 8/20/2013 70.8 9/18/2013 77.3 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 Dichloromethane (Methylene Chloride) (ug/L) 6.49 5.53 8.31 10.2 4.07 52.4* [12.1] 14.2 14.6 42.4 Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Nitrate + Nitrite (as N) (mg/L) 2.5 19.2 21.4 14.3 16.8 18.8 16.1 17.6 16.4 16.9 MW-30 (Class II) Chloride (mg/L) 128 1/23/2013 128 2/26/2013 129 3/20/2013 126 4/17/2013 117 5/15/2013 119 6/25/2013 127 7/10/2013 130 8/20/2013 126 9/18/2013 131 Uranium (ug/L) 8.32 8.36 7.4 6.85 6.31 8.22 7.48 7.07 7.00 Selenium (ug/L) 34 37.2 42.3 39 37.3 39.4 32.1 36.5 36.3 35.2 Quarterly Quarterly Quarterly Quarterly Nitrate + Nitrite (as N) (mg/L) 22.8 19.3 19.1 18.8 23.8 20.0 21.7 16.0 21.2 TDS (mg/L) 1320 1270 1390 1420 1260 1540 1380 1510 1440 1500 MW-31 (Class III) Chloride (mg/L) 143 1/22/2013 176 2/19/2013 174 3/19/2013 168 4/16/2013 171 5/13/2013 169 6/24/2013 179 7/9/2013 182 8/19/2013 183 9/17/2013 193 Selenium (ug/L) 71 NS 74.1 81.8 72.9 75.9 73.7 75.7 73.2 72.6 Field pH (S.U.) 6.5 - 8.5 6.94 7.32 7.28 6.37 7.92 7.10 7.36 7.06 Sulfate (mg/L) 532 611 644 611 668 630 659 659 656 666 Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Manganese (ug/L) 200 247 272 246 243 252 243 250 262 257 Thallium (ug/l) 0.5 <0.5 <0.5 0.505 <0.5 0.715 0.946 <0.5 <0.5 <0.5 Molybdenum (ug/L) NS <10 <10 <10 <10 <10 <10 <10 <10 MW-35 (Class II) Gross Alpha minus Rn . U (pCi/L) 3.75 1/23/2013 6.62 2/26/2013 5.09 3/19/13 9.51 4/17/2013 4.75 5/13/2013 4.92 6/24/2013 3.24 7/9/2013 5.70 8/19/2013 3.92 9/17/2013 5.10 Selenium (ug/L) 12.5 1.0 10.8 22.6 11.8 16.1 13.6 .01 <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 Quarterly Quarterly Quarterly Quarterly Quarterly Quarterly Required Semi-Annual Sampling Wells MW-01 (Class II) Manganese (ug/L) Tetrahydrofuran (ug/L) Sulfate (mg/L) 289 11.5 838 NS NA NA NA 3/12/2013 173 12.6 761 NS NA NA NA NS NA NA NA 5/21/2013 127 3.26 839 NS NA NA NA 7/23/2013 83.9 911 NS NA NA NA NS NA NA NA Semi-Annually Semi-Annually Semi-Annually Selenium (ug/L) 37 NA 51.8 NA NA 46.3 NA 52.0 NA NA MW-03 (Class III) Field pH (S.U.) 6.5 - 8.5 NS NA 3/12/2013 6.20 NS NA NS NA 5/22/2013 7.14 NS NA 7/18/2013 6.46 NS NA NS NA Fluoride (Mg/L) 0.68 NA 0.902 NA NA 0.994 NA 1.18 NA NA Semi-Annually Semi-Annually Semi-Annually Field pH (S.U.) 6.5-8.5 NA 6.84 NA NA 7.10 NA 6.50 NA NA MW-03A (Class III) Sulfate (mg/L) 3640 NA 3480 NA NA 3120 NA 3670 NA NA Nitrate + Nitrite (as N) (mg/L) 1.3 NS NA 3/13/2013 1.22 NS NA NS NA 5/23/2013 1.11 NS NA 7/19/2013 1.09 NS NA NS NA TDS (mg/L) 5805 NA 5750 NA NA 6020 NA 5860 NA NA Selenium (ug/L) 89 NA NA NA 75.6 NA 79.7 NA NA Semi-Annually Semi-Annually Semi-Annually Semi-Annually Semi-Annually MW-05 (Class II) Uranium (ug/L) 7.5 NS NA 3/11/2013 36 NS NA NS NA 5/14/2013 NS NA 7/18/2013 0.574 NS NA NS NA Semi-Annually MW-12 (Class III) Field pH (S.U.) 6.5 - 8.5 Selenium (ug/L) 25 NS NA NA 3/6/2013 6.56 19.6 NS NA NA NS NA NA 5/15/2013 7.19 19.0 NS NA NA 7/17/2013 6.60 20.5 NS NA NA NS NA NA Semi-Annually Semi-Annually MW-15 (Class III) Selenium (ug/L) 128.7 Iron (ug/L) 81.7 NS NA NA 3/5/2013 137 <30 NS NA NA NS NA NA 5/15/2013 120 <30 NS NA NA 7/18/2013 100 <30 NS NA NA NS NA NA Semi-Annually Semi-Annually Thallium (ug/l) .95 NA 3.26 NA NA 2.81 NA 3.32 NA MW-18 (Class III) Sulfate (mg/L) 1938.9 Field pH (S.U.) 6.25-8.5 NS NA NA 2/25/2013 1270 6.35 NS NA NA NS NA NA 5/20/2013 1860 6.97 NS NA NA 7/15/2013 1860 6.45 NS NA NA NS NA NA TDS (mg/L) 3198.77 NA 3350 NA NA 3160 NA 3170 NA NA Semi-Annually Semi-Annually Semi-Annually Semi-Annually Ql 2013 Results Q2 2013 Results Q3 2013 Results Monitoring Well (Water Class) Constituent Exceeding GWCL GWCL in Current GWDP January 2013 Monthly Sample Date January 2013 Monthly Result Ql 2013 Sample Date Ql 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 Sample Frequency Required Semi-Annual Sampling Wells, continued MW-19 (Class III) Field pH (S.U.) Gross Alpha minus Rn & U (pCi/L) Nitrate + Nitrite (as N) (mg/L) 6.78-8.5 2.36 2.83 NS NA NA NA 3/13/2013 6.50 1.11 3.61 NS NA NA NA NS NA NA NA 5/20/2013 7.16 1.19 4.21 NS NA NA NA 7/15/2013 6.91 <1.00 3.66 NS NA NA NA NS NA NA NA Semi-Annually Semi-Annually Semi-Annually MW-23 (Class III) Field pH (S.U.) 6.5 - 8.5 Manganese (ug/L) NS NA 550 3/11/2013 6.37 NS NA NA 137 NS NA 5/23/2013 7.23 NS NA 7/18/2013 6.61 NS NA NS NA NA 24.3 NA 129 NA NA NA Semi-Annually Semi-Annually Cadmium (ug/L) 2.5 NA 2.0 NA NA .32 NA 6.72 NA MW-24 (Class III) Fluoride (Mg/L) 0.36 NA 0.355 NA NA 0.21 NA 0.288 NA Thallium (ug/L) NS NA 3/13/2013 o.; NS NA NS NA 5/22/2013 0.618 NS NA 7/19/2013 1.64 NS NA NS Field pH (S.U.) 6.5 - 8.5 NA 6.29 NA NA 6.77 NA 5.80 NA NA NA NA NA Semi-Annually Semi-Annually Semi-Annually Nitrate + Nitrite (as N) (mg/L) 5.6 NA 7.94 NA NA 7.09 NA 6.97 NA Chloride (mg/L) 38 NA 50.3 NA NA 44.3 NA 44.2 NA MW-27 (Class III) Sulfate (mg/L) 462 Field pH (S.U.) 6.5-8.5 NS NA NA 2/25/2013 431 7.03 NS NA NA NS NA NA 5/21/2013 497 7.58 NS NA NA 7/17/2013 NA 7.00 NS NA NA NS TDS (mg/L) 1075 NA 1140 NA NA 1110 NA 1110 NA Gross Alpha minus Rn & U (pCi/L) NA <1.0 NA NA 1.57 NA <1.00 NA NA NA NA NA NA NA Semi-Annually Semi-Annually Semi-Annually Semi-Annually Semi-Annually Semi-Annually Chloride (mg/L) 105 NA 110 NA NA 102 NA 107 NA MW-28 (Class III) Manganese (ug/L) 1837 NS NA 3/5/2013 1680 NS NA NS NA 5/15/2013 1730 NS NA 7/17/2013 1650 NS NA NS Field pH (S.U.) 6.1 -8.5 NA 6.00 NA NA 6.63 NA 5.97 NA NA NA NA Semi-Annually Semi-Annually Semi-Annually Iron (ug/L) 1869 NA 1350 NA NA 1250 NA 1400 NA Manganese (ug/L) 5624 NA 5340 NA NA 5140 NA 5140 NA MW-29 (Class III) TDS (mg/L) 4400 NS NA 3/6/2013 4500 NS NA NS NA 5/23/2013 4340 NS NA 7/17/2013 4270 NS NA NS Field pH(S.U.) 6.46 - 8.5 NA 6.36 NA NA NA 6.37 NA NA NA NA NA Semi-Annually Semi-Annually Semi-Annually Semi-Annually MW-32 (Class III) Gross Alpha minus Rn & U (pCi/L) 3.33 NA 5.02 NA NA 3.72 NA 6.46 NA NS 2/19/2013 NS NS 5/13/2013 NS 7/9/2013 NS NS Field pH (S.U.) 6.4 - 8.5 NA 6.52 NA NA 7.10 NA 6.39 NA NA NA Semi-Annually 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. * Data are reported from the 6/5/13 chlorofrm program sample.