2017-09-28_REVISION - M1981185 (145)

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May Day Idaho Mine Complex Sunrise Mining, LLC TABLE 13 Water Sampling Results -2016-2017 5 Quarter Summary Idaho Mill Well acute I TVS Table Value Standard I I I I tr trace dis dissolved tot Total sc GROUNDWATER STANDARDS Analyte RL PDWS RESULTS RESULTS RESULTS RESULTS Secondary Drinking Water Standard RESULTS AVERAGE ND 0.00024 0.00034 0.06546 NO ND NO 0.00256 NO 0.00088 NO 0.085 NO NO 0.01154 NO NO 0.0005 0.0582 0.0744 NO NO NO 1.956 174 24.32 0.00002 0.00048 ND ND Analyte dl detection ID -1 Well Aluminum Dissolved by ICP 0.050 520/2016 ND 8/242016 NO 11/12016 NO 4/282017 ND 6/22/2017 NO Aluminum 5 mg/I Agriculture Standards I0-1 Well Antimony Dissolved by ICPMS 0.0025 520/2016 NO 8/242016 NO 11/12016 NO 4128/201710.0007 6222017 0.0005 Antimony 0.006 mg/I Domestic Water Supply -Human Health Standards ID -1 Well Arsenic Dissolved by ICPMS 0.0025 5/20/2016 ND 8/24/2016 NO 11/1/2016 NO 4282017 0.0008 6222017 0.0009 Arsenic 0.01 mg/I Domestic Water Supply -Human Health Standards ID -1 Well Barium Dissolved by ICPMS 0.0025 5/20/2016 0.0631 8/242016 0.0569 11/12016 0.0617 4282017 0.0713 6/22/2017 0.0743 Barium 2 Domestic Water Supply -Human Health Standards ID -1 Well Beryllium Dissolved by ICPMS 0.0025 5/20/2016 NO 8/24/2016 NO 11/1/2016 ND 41282017 NO 6 /2 212 01 7 ND Beryllium ID -1 Well Boron Dissolved by ICP 0.300 5/20/2016 NO 8/24/2016 NO 11/12016 ND 4/282017 NO 6/22/2017 ND Boron IDA Well Cadmium Dissolved by ICPMS 0.0005 5/20/2016 NO 8/24/2016 NO 11112016 NO 4282017 NO 6/22/2017 ND Cadmium 0.004 mg/I Domestic Water Supply -Human Health Standards ID -1 Well Chromium Dissolved by ICPMS 0.0050 5/20/2016 NO 8/242016 NO 11/12016 NO 4/282017 0.0084 622/2017 0.0044 Chromium 0.1 mg/I ID -1 Well lCobalt Dissolved by ICPMS 0.0005 520/2016 NO 8/24/2016 NO 11/12016 NO 4/282017 NO 6/22/2017 NO Cobalt 0.05 Copper Dissolved by ICPMS 0.0005 520/2016 0.0016 8/242016 0.0013 11/12016 ND 4/282017 0.0006 6/22/2017 0.0009 Copper 0.2 mg/I Cyanide, WAD 0.0100 520/2016 ND 8/242016 ND 11/12016 NO 4282017 ND 6/22/2017 NO Cyanide, WAD l Fluoride by lC 0.100 520/2016 0.105 8/242016 0.217 11/1/2016 NO 4282017 ND 6/22/2017 0.103 Fluoride l Iron Dissolved by ICP 0.050 5/20/2016 NO 8/242016 NO 11/1/2016 NO 4/282017 NO 6/22/2017 NO Iron 0.3 mg/1 domestic Water Supply -Human Health Standards KID-lWell l Lead Dissolved by ICPMS 0.0025 5/20/2016 NO 8/24/2016 NO 11/1/2016 NO 4/282017 NO 6/2212017 NO Lead 0.005 mg/I l Manganese Dissolved by ICPMS 0.0025 5/20/2016 NO 8/24/2016 0.0529 11/1/2016 ND 4/282017 NO 6/22/2017 0.0048 Manganese 0.05 mg/I Agriculture Standardsl Mercury Dissolved by CVAA 0.0002 5/20/2016 NO 8/24/2016 NO 11/1/2016 NO 4/282017 NO 6/22/2017 NO Mercury 0.002 mg/I Domestic Water Supply -Human Health Standards l Molybdenum Dissolved by ICPMS 0.0025 520/2016 NO 8/24/2016 NO 11/1/2016 ND 4282017 0.0005 6/22/20171 ND Molybdenum 0.035 mg/I Domestic Water Supply -Human Health Standards ID -1 Well Nickel Dissolved by ICPMS 0.0025 5/20/2016 NO 8/242016 NO 11/12016 NO 4282017 0.0014 6/22/2017 0.0011 Nickel 0.1 mg/I Agriculture Standards ID -1 Well Nitrate as N by IC 0.200 5/20/2016 NO 8/24/20161 0.081 11/1/2016 0.146 4128/201710.146 6/22/2017 0.145 Nitrate as N 10 mg/I Domestic Water Supply -Human Health Standards ID -1 Well Nitrate/Nitrite as N by IC Package 0.400 5/20/2016 ND 8/242016 0.081 11/1/2016 NO 4282017 0.146 6/22/2017 0.145 Nitrate Nitrite as N by IC ID -1 Well Nitrite as N by IC 0.200 520/2016 NO 8/24/2016 NO 11/1/2016 NO 4282017 NO 6/2212017 NO Nitrile as N ID -1 Well pH 5/20/2016 8.29 8/24/2016 7.22 11/1/2016 8.09 4282017 8.39 6/22/2017 8.44 pH 6.0-9.0 Domestic Water Supply -Human Health Standards ID -1 Well Selenium Dissolved by ICPMS 0.0050 5/20/2016 ND 8/24/2016 NO 11/1/2016 NO 4282017 NO 6/22/2017 ND Selenium 0.05 mg/I Domestic Water Supply -Human Health Standards ID -1 Well Silver Dissolved by ICPMS 0.0005 5/20/2016 NO 8/242016 NO 11/1/2016 NO 4282017 NO 6/22/2017 ND Silver 0.05 mg/I Domestic Water Supply -Human Health Standards ID -1 Well Sodium Dissolved by ICP 1.00 5/20/2016 3.19 8/24/2016 ND 11/1/2016 ND 4282017 2.65 6/22/2017 3.94 Sodium ID -1 Well Solids, Total Dissolved (TDS) 10.0 5/20/2016 225 8/24/2016 100 11/1/2016 165 4282017 245 6/22/2017 135 Total Dissolved Solids Domestic Water Supply -Human Health Standards ID -1 Well Sulfate by IC 1.00 520/2016 26.2 8/242016 20.5 11/1/2016 33.6 4282017 20.9 6/22/2017 18.4 Sulfate 250 mg/I ID -1 Well Thallium Dissolved by ICPMS 0.0005 5/20/2016 NO. 8/24/2016 NO 11/1/2016 ND 4/28/2017 ND 6/22/2017 0.0001 Thallium ID -1 Well Uranium Dissolved by ICPMS 0.0005 520/2016 0.0008 8/24/2016 NO 11/1/2016 ND 4/28/2017 0.0008 6/22/2017 0.0008 Uranium ID -1 Well jVanadjum Dissolved by ICPMS 0.0025 5/20/2016 NO 8/24/2016 NO 11112016 ND 4/28/2017 ND 6/22/2017 ND Vanadium ID -1 Well lZinc Dissolved by ICPMS 0.0050 5/20/2016 NO 8/24/2016 NO 11/1/2016 NO 4/28/2017 ND 6122/2017 NO Zinc 1 2 m /I Agriculture Standards L1/ CDPHE -Water Quality Control Division Regulation 41 Table 1, 2 and 3 (1) units in milligrams per liter unless othenvise noted Basic Standards and Methodologies for Surface Waters 5 CCR 1002-31 (Regulation 31 -Colorado Water Quality Control Division) Table III and IV ac acute I TVS Table Value Standard ch chronic WS Water Standard tr trace dis dissolved tot Total sc specific conductance NO non detect PDWS Primary Drinking Water Standard rl reporting SCWS Secondary Drinking Water Standard limit dl detection NS No Standard limit Total TDS Dissolve CSWS COLORADO SURFACE WATER STANDAR d Solids Non Detect = 0 Page 10 Final 2016-17 SUM SW GW -TABLE 1-1: