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_ 0 COLORADO LEGACY LAND <br /> TABLE 2A.GROUNDWATER SAMPLE FIELD PARAMETERS <br /> Field Parameters <br /> Location ID/ Static Depth to Water pH Temperature Conductivity ORP Dissolved Oxygen Notes/Location Description <br /> Sample ID3 Sample Date (ft btoc) unitless °C µS cm mV m L _ <br /> MW-00 7/28/2020 10.40 7.49 10.9 377.2 277.5 2.01 Alluvial well. Above waste dumps, upstream of site. <br /> MW-0 7/28/2020 13.44 7.03 11.1 585.0 42.1 1.83 Alluvial well.Toe of south waste rock pile. <br /> MW-6 7/28/2020 11.05 7.13 12.7 1,110 135.4 2.44 Alluvial well. Near former Sump#2. <br /> MW 7 Not Sampled, -- __ -- -- -- Alluvial well. Near Sump#1 <br /> Insufficient Volume'. <br /> MW-12 Not Sampled, _ Below Sump#1.Alluvial well. <br /> Insufficient Volume'. <br /> MW-13 Not Sampled, -- _ _ Nitrogen purge.Replaced MW-10.Previous Sample ID=L1.Background well. <br /> Insufficient Volume'. <br /> MW-14 Not Sampled, __ -- -- -- -- Nitrogen purge.Replaced MW-11. Previous Sample ID=L2.Background well. <br /> Insufficient Volume'. <br /> MW-15 7/29/2020 336.1 7.66 12.0 1,028 -109.9 2.77 Nitrogen purge.Previous Sample ID=L3.Bedrock well. <br /> MW-16 N/A.Monitor Water Transducer N/A N/A N/A N/A N/A Previous Sample ID=L4.Bedrock well. <br /> Level Only. malfunction.2 <br /> MW-17 Not Sampled, __ -_ -- -- Nitrogen purge.Previous Sample ID=L5. <br /> Insufficient Volumel. <br /> MW-18 7/29/2020 162.3 8.07 17.3 1,261 -155.1 1.28 Previous Sample ID= L6.Bedrock well,installation targeted Illinois fault zone in alluvial valley. <br /> MW-19 Not Sampled, __ __ -- -- -- Toe of south waste rock pile.Previous Sample ID=L7. <br /> Insufficient Volume'. <br /> MW-20 Not Sampled, - -- __ -- -- -- Usually dry.Top of south waste rock pile. <br /> Insufficient Volume'. <br /> Sample collected from spigot inside water treatment plant. This is the water treatment plant <br /> Raw Feed 7/28/2020 N/A 7.19 21.2 4,019 -123.9 7.50 intake from the mine pool.Previous Sample ID=Mine Refill. <br /> Sample collected from spigot inside water treatment plant. This is the collected sump water <br /> Sumps 7/28/2020 N/A 7.16 23.0 1,644 0.4 1.58 from Sump#1 (Master Sump). <br /> Notes: <br /> 'Water present in well,insufficient volume to collect sample. <br /> 2Obstruction in well.Transducer was unable to be installed and static water level meter was unable to collect measurement. <br /> 3MW-1,MW-2,MW-3A,and MW-8 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 btoc=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 /> PAGE 7 OF 12 <br />