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Table 7. 2017 Water Quality Results - May Day No. 1 Well (MD-1) <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 I 6/22/2017 I 10/25/2017 I 12/27/2017 MCL(1)or SMCLt2t <br /> Field Measurements <br /> Temperature(°C) 10.9 NA 8.0 7.4 <br /> Conductivity(pS/cm) 38 NA 729 740 <br /> Dissolved Oxygen(%) 3.5 NA NA NA <br /> pH(S.U.) 7.24 NA 7.24 7.24 6-8.5 <br /> ORP(mV) -43 NA NA NA <br /> Static Water Level(feet) 128.4 NA 142.5 139 _. <br /> Lab Results <br /> Aluminum Dissolved by ICP ND ND ND ND 0.05 to 0.2(2) <br /> Antimony Dissolved by ICPMS 0.0006 ND 0.0005 0.0006 0.006(1) <br /> Arsenic Dissolved by ICPMS ND 0.0006 ND ND 0.01(1) <br /> Barium Dissolved by ICPMS 0.0182 0.0175 0.0157 0.0159 2(1) <br /> Beryllium Dissolved by ICPMS ND ND ND ND 0.004w <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 0.0170 0.0102 0.0305 0.0078 0.1(1) <br /> Cobalt Dissolved by ICPMS 0.0002 0.0003 0.0004 0.0004 <br /> Copper Dissolved by ICPMS 0.0003 0.0014 0.0004 0.0002 1.3(1)(3), 1.0(2) <br /> Cyanide,WAD ND ND ND ND 0.2(1) <br /> Fluoride by IC 0.210 0.308 0.273 0.243 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(1x3) <br /> Manganese Dissolved by ICPMS 0.192 0.363 0.250 0.238 TVS(4) <br /> Mercury Dissolved by CVAA ND ND ND ND 0.002(1) <br /> Molybdenum Dissolved by ICPMS ND ND ND ND <br /> Nickel Dissolved by ICPMS 0.0038 0.0037 0.0050 0.0066 0.1(1) <br /> Nitrate as N by IC 0.230 ND 0.020 ND 10(1) <br /> Nitrate/Nitrite as N by IC Package 0.23 ND ND ND 10(1) <br /> Nitrite as N by IC ND ND ND ND 1(1) <br /> pH(S.U) 7.43 7.45 7.32 7.38 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 2.36 2.95 2.75 2.29 <br /> Solids,Total Dissolved(TDS) 430 590 520 520 <br /> Sulfate by IC 111 183 131 149 250(2) <br /> Thallium Dissolved by ICPMS ND ND ND ND 0.0021v <br /> Uranium Dissolved by ICPMS 0.6 0.8 0.9 0.7 30 pq/L(1) <br /> Vanadium ND ND 0.0083 ND <br /> Zinc Dissolved by ICPMS 0.0033 0.0058 0.0035 0.0037 TVS(4) <br /> Notes: <br /> mg/L=milligrams per Liter <br /> °C=degrees Celsius <br /> uS/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.xlsxMD-1 <br />