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Table 2. 2019 Water Quality Results`- <br /> La Plata River-Lower Sampling Point(SW-2) <br /> May Day Idaho Mine Complex <br /> Sunrise Mining,LLC <br /> All values in mg/L unless otherwise noted <br /> analyte Date I safe Drlinfiding Water act <br /> V20011 MCL0 or$MCL44 <br /> Field Measurements <br /> Temperature °C 491 <br /> Conductivity S/cm) 83 <br /> H SU 717 6-85 <br /> Flow cfs' 237 <br /> Lab Results <br /> Alkalinity,Bicarbonate 350 <br /> Alkalinity,Carbonate ND <br /> Alkalinity,Hydroxide ND <br /> Alkalinity,Total 35 <br /> Aluminum Dissolved by ICP NO 0 05 to 0 2'2) <br /> Ammonia ND TVS'4i <br /> Antimony Dissolved by ICPMS NO 0 006'11 <br /> Arsenic 200 8 by ICPMS NDI 0 010) <br /> Arsenic Dissolved by ICPMS NO 0 01r11 <br /> Barium Dissolved by ICPMS 00297 2'1l <br /> Beryllium Dissolved by ICPMS NO 0 000l <br /> Boron 200 7 by ICP NO <br /> Cadmium Dissolved by ICPMS ND 0 005i'i <br /> Calcium Dissolved by ICP 135 <br /> Chloride by IC ND 250t2) <br /> Chromium 2008 by ICPMS NO 0 11'I <br /> Copper Dissolved by ICPMS 00051 1 31'i(3),1 0(2) <br /> Cyanide,WAD ND 021'i <br /> Fluoride by IC 0 163 4 Oi'i 2 0(2) <br /> Hardness dis 41 <br /> Iron 200 7 by ICP 0 083 0 30(2) <br /> Iron Dissolved by ICP NO 0 30(2) <br /> Lead 200 8 by ICPMS ND 0 015t'ii3l <br /> Lead Dissolved by ICPMS NO 0 015i'lr3l <br /> Magnesium Dissolved by ICP 1 74 0 05121 <br /> Manganese Dissolved by ICPMS 15 TVS(4) L <br /> Mercury Dissolved by CVAA NO 00021'I <br /> Molybdenum Dissolved by ICPMS 00008 <br /> Nickel Dissolved by ICPMS NDI 0 1"1 <br /> Nitrate as N by IC 0 096 1001 <br /> Nitrate/Nitrite as N by IC Package 00956 100) <br /> Nitrite as N by IC NO 1i1i <br /> H SU 756 6-85 <br /> Selenium Dissolved by ICPMS ND 0 05i'i <br /> Silver Dissolved by ICPMS NO 0 10(2) <br /> Solids,Total Dissolved TDS 50 <br /> Solids Total Suspended(TSS) ND <br /> Sulfate by IC 885 250r2i <br /> Thallium Dissolved by ICPMS NO 0 002 <br /> Zinc Dissol <br /> Uranium Dissolved b ICPMS 01 30 /Li <br /> ved b ICPMS 0 002 TVS(4) <br /> Notes <br /> mg/L=milligrams per Liter <br /> °C=degrees Celsius <br /> pS/cm=mcrosiemens per centimeter <br /> S U=standard units <br /> mV=mllivoks <br /> cfs=cubic feet per second <br /> p92=mcrogram per Liter <br /> NA=not applicable <br /> NO=not detected <br /> TVS=table value standards <br /> Footnotes <br /> Single sample for 01 and 02 results per DRMS approval letter dated June 21,2019 <br /> La Plata River flowtaken from Hesperus Gage(LAPHESCO) <br /> (1)SDWA NPDWR MCL=Safe Dnnking Water Act National Primary Drinking Water <br /> Regulations Maximum Contamnant Level These are legally enforceable standards that apply <br /> to public drinking water systems Primary standards protect public health by limiting the levels of <br /> (2)SDWA NSDWR SMCL=Safe Drinking Water Act National Secondary Drinking water <br /> Regulations Secondary Maximum Contamnant Level These are non enforceable guidelines <br /> regulating contaminants that may cause cosmetic effects(such as skin or tooth discoloration) <br /> (3)Treatments Technique(TT) A required process intended to reduce the level of a <br /> contaminants in drinking water Lead and copper are regulated by a Treatment Technique that <br /> requires a system to control the corrosiveness of their water If more than 10%of tap water <br /> (4)1002-31-Regulation 31-Colorado Water Quality Control Division,Tables III and R/ <br /> SGM P\Proied Filesi2017-460001 Sun—Mirsrg-MayDaylyl-W-Water Oualftyi20191 <br /> 071120019 TN.1-10-01.02-10ay Day IEalw Mine Compie.WO-Resu11s-2019SW-2 <br />