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Table 1. 2017 Water Quality Results -La Plata River-Upper Sampling Point(SW-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 ( 6/21/2017 ' 10/24/2017 I 12/27/2017 MCL(1)or SMCL12) <br /> Field Measurements <br /> Temperature(CC) 1.1 10.4 8.8 Dry <br /> Conductivity(pS/cm) 149 84_ 161 Dry <br /> Dissolved Oxygen(%) 15.0 10.9_ NA_ Dry <br /> pH(S.U.) 7.54 7.79 8.04 Dry 6-8.5 <br /> ORP(mV) 64 23 NA Dry <br /> Flow(cfs)* NA NA 6.38 NA <br /> Lab Results <br /> Alkalinity,Bicarbonate 51.0 31.0 50 Dry <br /> Alkalinity,Carbonate ND ND ND Dry <br /> Alkalinity, Hydroxide ND ND ND Dry <br /> Alkalinity,Total 51.0 31.0 50 Dry <br /> Aluminum Dissolved by ICP ND ND ND Dry 0.05 to 0.2(2) <br /> Ammonia ND ND ND Dry TVS(4) <br /> Antimony Dissolved by ICPMS ND ND ND Dry 0.006(1) <br /> Arsenic 200.2 by ICP-MS ND ND ND Dry 0.01(1) <br /> Arsenic Dissolved by ICPMS ND 0.0005 ND Dry 0.011 <br /> Barium Dissolved by ICPMS 0.0395 0.0271 0.0535 Dry 2(7) <br /> Beryllium Dissolved by ICPMS ND ND ND Dry 0.004(1) <br /> Boron 200.2 by ICP ND ND ND Dry <br /> Cadmium Dissolved by ICPMS ND ND ND Dry 0.005w <br /> Calcium Dissolved by ICP 18.0 13.4 25.9 Dry <br /> Chloride by IC ND ND ND Dry 250)2) <br /> Chromium 200.2 by ICPMS ND ND ND Dry 0 1(1) <br /> Copper Dissolved by ICPMS 0.0061 0.0061 0.0022, Dry 1.3111131, 1.0(2) <br /> Cyanide,WAD ND ND ND Dry 0.2(1) <br /> Fluoride by IC 0.210 0.164 0.28 Dry 4.0(1), 2.0(2) <br /> Hardness,dis 54 40.3 78.3 Dry <br /> Iron 200.2 by ICP ND ND ND Dry 0.30(2) <br /> Iron Dissolved by ICP ND ND ND Dry 0.30(2) <br /> Lead 200.2 by ICPMS ND ND ND Dry 0.015(1113) <br /> Lead Dissolved by ICPMS ND, ND ND Dry 0.015(1)(3) <br /> Magnesium Dissolved by ICP 2.22 1.66 3.34 Dry 0.05(2) <br /> Manganese Dissolved by ICPMS 0.0019 0.0028 0.0008 Dry TVS(4) <br /> Mercury Dissolved by CVAA ND ND ND Dry 0.002(1) <br /> Molybdenum Dissolved by ICPMS 0.0006 0.0006 0.001 Dry <br /> Nickel Dissolved by ICPMS 0.0009 0.0008 0.0016 Dry 0.1(11 <br /> Nitrate as N by IC 0.106 0.063 0.112 Dry 10(1) <br /> Nitrate/Nitrite as N by IC Package 0.106, 0.0625 0.112 Dry 10(11 <br /> Nitrite as N by IC ND ND ND Dry 111) <br /> pH(Standard Units) 7.92 8.05 8.04 Dry 6-8.5 <br /> Selenium Dissolved by ICPMS ND ND ND Dry 0.0511) <br /> Silver Dissolved by ICPMS ND ND ND Dry 0.10(2) <br /> Solids,Total Dissolved(TDS) 75.0 75.0 85 Dry 500(2) <br /> Solids,Total Suspended(TSS) ND 7.1 ND Dry <br /> Sulfate by IC 11.9 9.50 35.6 Dry 250(2) <br /> Thallium Dissolved by ICPMS ND ND ND Dry 0.002w <br /> Uranium Dissolved by ICPMS 0.1 ND 0.2 Dry 30 pg/L(1) <br /> Zinc Dissolved by ICPMS 0.0068 0.0023 0.0065 Dry 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 /> cfs=cubic feet per second <br /> SGM <br /> 01/15/2018 P:\Project Files\2017-460.001 Sunrise Mining-May Day Mine\M-Water Quality\ <br /> Tbls.1-10-May Day Idaho Mine Complex WO-Results-2017.xisxSW-1 <br />