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Table 1. 2019 Water Quality Results`- <br /> 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 /> Analyte Date I Sato prinking Water Act <br /> 72812019 MCV)or SMCL(21 <br /> Field Measurements <br /> Temperature °C 4 8 <br /> Conductive S/cm) 74 <br /> H ISU 701 6-85 <br /> Flow cfs" 237 <br /> Lab Results <br /> Alkalinity,Bicarbonate 33 <br /> Alkalinity,Carbonate ND <br /> Alkalinity,Hydroxide ND <br /> Alkalinity,Total 33 <br /> Aluminum Dissolved by ICP ND 0 05 to 0 2121 <br /> Ammonia ND TVS 14) <br /> Antimony Dissolved by ICPMS NO 000601 <br /> Arsenic 200 8 by ICPMS NO 0 011'1 <br /> Arsenic Dissolved by ICPMS ND 0 017 <br /> Banum Dissolved by ICPMS 00268 211) <br /> Beryllium Dissolved by ICPMS ND 0000) <br /> Boron 200 2 by ICP ND <br /> Cadmium Dissolved by ICPMS ND 0 005111 <br /> Calcium Dissolved by ICP 124 <br /> Chloride by IC ND 250121 <br /> Chromium 200 8 by ICPMS ND 0 11'1 <br /> Copper Dissolved by ICPMS 00056 1 31'1131,1 0121 <br /> Cyanide,WAD ND 02(') <br /> Fluoride by IC 0 151 4 01't, 2 0121 <br /> Hardness,dis 373 <br /> Iron 200 2 by ICP 0 089 0 30121 <br /> Iron Dissolved by ICP ND 0 30121 <br /> Lead 200 8 by ICPMS ND 0 0151'/131 <br /> Lead Dissolved by ICPMS ND 0 015111(3) <br /> Magnesium Dissolved by ICP 1 56 0 0512i <br /> Manganese Dissolved by ICPMS 16 TVS(4) /L <br /> Mercury Dissolved by CVAA ND 0 0021'1 <br /> Molybdenum Dissolved by ICPMS 00006 <br /> Nickel Dissolved by ICPMS ND 0 101 <br /> Nitrate as N by IC 0 104 10111 <br /> Nitrate/Nitrite as N by IC Package 0 104 10111 <br /> Nitrite as N by IC ND 1111 <br /> H Standard Units 755 6-8 5 <br /> Selenium Dissolved by ICPMS ND 0 0501 <br /> Silver Dissolved by ICPMS ND 0 10111 <br /> Solids,Total Dissolved TDS 45 50012i <br /> olids Total us ended T ND <br /> Sulfate bL IC 798 250121 <br /> T1lallium Dissolved by ICPMS ND 0 002 <br /> Uranium Dissolved by ICPMS ND 30 /L1 1 <br /> Zinc Dissolved by ICPMS NO TVS(4) <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 /> cfs=cubic feet per second <br /> pg/L=mcrogram per Liter <br /> NA=not apphcable <br /> ND=not detected <br /> TVS=table value standards <br /> Footnotes <br /> Single sample for Of and 02 results per DRMS approval letter dated June 21,2019 <br /> La Plata River fbwtaken from Hesperus Gage(LAPHESCO) <br /> (1)SDWA NPDWR MCL=Safe Drinking Water Act National Primary Drinking Water Regulations <br /> Maximum Contamunant Level These are legally enforceable standards that apply to public drinking water <br /> systems Primary standards protect public health by hmting the levels of contamnants in drinking mter <br /> (2)SDWA NSDWR SMCL=Safe Drinking Water Act National Secondary Drinking water Regulations <br /> Secondary Maximum Contaminant Level These are non-enforceable guidelines regulating <br /> contaminants that may cause cosmetic effects(such as skin or tooth discoloration)or aesthetic effects <br /> (3)Treatments Technique(TT) A required process intended to reduce the level of a contamnants in <br /> drinking water Lead and copper are regulated by a Treatment Technique that requires a system to <br /> control the corrosiveness of their water If more than 10%of tap water samples exceed the Action <br /> (4)1002-31-Regulation 31-Colorado Water Quality Control Division,Tables III and IV <br /> SGM <br /> 07M22019 PWrge Fi1as12017-460001 Sun—Ming-MayDayMin6M-Water OuaNy12019\ <br /> This 1-10-01-02-May Day Want Mme Cur I-W0-Resuita-2019SW-1 <br />