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Table 10. 2017 Water Quality Results - Idaho Mill Well (ID-GW) <br /> May Day Idaho Mine Complex <br /> Sunrise Mining, LLC <br /> All values in mg/L unless otherwise noted <br /> Date Safe Drinking Water Act <br /> Analyte 4/28/2017 ( 6/22/2017 1 10/25/2017 ( 12/27/2017 MCL(')or SMCLtZt <br /> Field Measurements <br /> Temperature(°C) 6.7 NA 7.0 6.9 <br /> Conductivity(pS/cm) 293 NA 230 278 <br /> Dissolved Oxygen(%) 11.9 NA NA NA <br /> pH(S.U.) 8.41 NA 8.54 8.27 6-8.5 <br /> ORP(my) -38 NA NA NA <br /> Static Water Level(feet) 46.55 NA 47.1 46.25 <br /> Lab Results <br /> Aluminum Dissolved by ICP ND ND ND ND 0.05 to 0.2(2) <br /> Antimony Dissolved by ICPMS 0.0007 0.0005 0.0005 0.0008 0.006(1) <br /> Arsenic Dissolved by ICPMS 0.0008 0.0009 0.0015 0.0018 0.01(1) <br /> Barium Dissolved by ICPMS 0.0713 0.0743 0.0534 0.0499 2(1) <br /> Beryllium Dissolved by ICPMS ND ND ND ND 0.004(1) <br /> Boron Dissolved by ICP ND ND ND ND <br /> Cadmium Dissolved by ICPMS ND ND ND ND 0.005(1) <br /> Chromium Dissolved by ICPMS 0.0084 0.0044 0.0091 0.003 0.1(1) <br /> Cobalt Dissolved by ICPMS ND ND 0.0001 ND <br /> Copper Dissolved by ICPMS 0.0006 0.0009 0.0009 0.0012 1.3(1)(3), 1.0(2) <br /> Cyanide,WAD ND ND ND ND 0.2(1) <br /> Fluoride by IC ND 0.103 0.110 0.106 4.0(1), 2.0(2) <br /> Iron Dissolved by ICP ND ND ND ND 0.30(2) <br /> Lead Dissolved by ICPMS ND ND ND ND 0.015(1)(3) <br /> Manganese Dissolved by ICPMS ND 4.8 0.5 1.3 TVS(4)pg/L <br /> Mercury Dissolved by CVAA ND ND ND ND 0.002(1) <br /> Molybdenum Dissolved by ICPMS 0.0005 ND 0.0008 0.0009 <br /> Nickel Dissolved by ICPMS 0.0014 0.0011 0.0013 0.0017 0.1(1) <br /> Nitrate as N by IC 0.146 0.145 0.115 0.141 10(1) <br /> Nitrate/Nitrite as N by IC Package 0.146 0.145 0.115 0.141 10(1) <br /> Nitrite as N by IC ND ND ND ND 1(1) <br /> pH(S.U.) 8.39 8.44 8.41 8.23 6-8.5 <br /> Selenium Dissolved by ICPMS ND ND ND ND 0.05(1) <br /> Silver Dissolved by ICPMS ND ND ND ND 0.10(2) <br /> Sodium Dissolved by ICP 2.65 3.94 3.78 4.41 <br /> Solids,Total Dissolved(TDS) 245 135 150 165 <br /> Sulfate by IC 20.9 18.4 25.7 30.6 250(2) <br /> Thallium Dissolved by ICPMS ND 0.0001 ND ND 0.002"/ <br /> Uranium Dissolved by ICPMS 0.8 0.8 0.9 1.2 30 pg/L(1) <br /> Vanadium ND ND ND ND <br /> Zinc Dissolved by ICPMS ND ND ND 2.4 TVS(4)pg/L <br /> Notes <br /> mg/L=milligrams per Liter <br /> °C=degrees Celsius <br /> pS/cm=microsiemens per centimeter <br /> S.U.=standard units <br /> mV=millivolts <br /> pg/L=microgram per Liter <br /> NA=not applicable <br /> ND=not detected <br /> TVS=table value standards <br /> SGM P:\Project Files\2017-460.001 Sunrise Mining-May Day Mine\M-Water Quality\ <br /> 01/15/2018 Tbls.1-10-May Day Idaho Mine Complex WQ-Results-2017.xlsxlD-GW <br />