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COLORADO LEGACY LAND <br /> -„ _ .:., ,,....... - - -,. 6HOWNSiMPLE FIELD PARAMETERS <br /> -- Field Parameters - <br /> Location ID/ <br /> Sample ID2 Sample Date Static Depth to Temperature Conductivity Dissolved Notes/Location Description <br /> p Water(ft btoc) pll(unitless) VC) (µS/cm) ORP(mV) Oxygen(mg/L) <br /> MW-00 07/21/2021 8.71 7.55 10.2 260.7 105.6 i.I t+ Alluvial well.Above waste dumps,upstream of site. <br /> MW-0 07/21/2021 11.58 7.40 11.5 397.9 47.7 2.39 Alluvial well.Toe of south waste rock pile. <br /> MW-6 07/21/2021 8.05 7.22 12.8 635.0 138.6 4.71 Alluvial well.Near former Sump Q. <br /> MW-7 07/20/2021 8.35 7.2 14.6 875.0 91.1 3.74 Alluvial well. Near Sump#1.This sample was a grab sample was taken 24 hours after the first <br /> attempt to sample during which the well ran dry while purging. <br /> MW-12 Not Sampled' -- -- -- -- -- -- Below Sump#1.Alluvial well. <br /> MW-13 1 07/27/2021 442.72 8.33 9.9 315.3 -75.9 1.88 Nitrogen purge.Replaced MW-10.Previous Sample ID=Ll.Background well. <br /> MW-1.4 07/27/2021 76.97 8.00 9.5 160.1 -113.0 1.81 Nitrogen purge.Replaced MW-11. Previous Sample ID=1.2.Background well. <br /> MW-is 07/27/2021 386.30 8.45 11.6 789.0 -276.0 135 Nitrogen purge.Previous Sample ID=1.3.Bedrock well. <br /> MW-16 -- -- -- -- -- -- -- Previous Sample ID=L4.Bedrock well.No sample required. <br /> MW-17 Not Sampled' Nitrogen purge.Previous Sample ID=L5. <br /> MW-18 Not Sampled I -- -- -- -- -- -- Previous Sample ID=L6.Bedrock well,installation targeted Illinois fault zone in alluvial valley. <br /> MW-19 07/21/2021 16.60 7.34 11.3 447.5 134.6 4.67 Toe of south waste rock pile.Previous Sample ID=1.7. <br /> MW-20 Not Sampled] -- -- -- -- -- Usually dry.Top of south waste rock pile. <br /> Raw Feed 07/21/2021 -- 7.38 21.9 3,S27 -117.2 2.53 Sample collected from spigot inside water treatment plant This is the water treatment plant intake <br /> from the mine pool.Previous Sample 1D=Mine Refill. <br /> Sumps 07/20/2021 -- 7.00 18.8 1,082 137.9 8.60 Sample collected from sump water from Sump#1(Master Sump). <br /> Notes: <br /> 'Water present in well was dry or insufficient volume to collect sample. <br /> 2MW1,MW2,MW-3A,and MW-B were removed in 2019;MW-4 and MW-5 were removed in 2008.MW-8 was replaced with MW-12.MW-10 and MW-11 were fouled(bentonite in screened interval)and replaced with MW-13 and MW-14. <br /> µS/cm=microSemiens per centimeter <br /> °C=degrees Celsius <br /> ft bloc=feet below top of casing <br /> ID=Identifier <br /> mg/L=milligrams per liter <br /> mV=millivolts <br /> MW=Monitoring Well <br /> ORP=Oxidization Reduction Potential <br /> Pura_to or Is <br />