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TABLE 3A:GROUNDWATER SAMPLE FIELD PARAMETERS <br /> Field Parameters <br /> Location ID/ <br /> Sample 1Dl Sample Date Static Depth to Temperature Conductivity Dissolved Notes/Location Description <br /> p Water(ft btoc) pH(unitless) VC) (µS/cm) ORP(mV) Oxygen(mg/L) <br /> MW-00 12/8/2021 7.18 7.17 8.7 ioH-u 1,4.7 3.80 Alluvial well. Above waste dumps,upstream of site. <br /> MW-0 12/8/2021 14.06 11.7 6;0 149.6 2.66 Alluvial well.Toe ofsouth waste rock pile. <br /> MW-6 NotSampled' -- -- Alluvialwell. Near former Sump#2. <br /> MW-7 Not Sampled 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 10/13/2021 440.43 6.99 9.1 323.1 -5.7 0.47 Nitrogen purge.Replaced MW-10.Previous Sample ID=L1.Background well. <br /> MW-14 10/13/2021 98.02 7.08 8.9 174.3 -154.2 0.06 Nitrogen purge.Replaced MW-11. Previous Sample ID=L2.Background well. <br /> MW-15 10/12/2021 422.8 7.72 11.1 830 -286.2 0.36 Nitrogen purge.Previous Sample ID=L3.Bedrock well. <br /> M W-16 --sss -- -- -- -- -- 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 Previous Sample ID=L6.Bedrock well,installation targeted Illinois fault zone in alluvial valley. <br /> MW-19 10/21/2021 19.14 6.94 12.1 716 124.8 3.6 Toe of south waste rock pile.Previous Sample ID=L7. <br /> MW-20 Not Sampled) -- -- -- -- -- -- Usually dry.Top of south waste rock pile. <br /> Raw Feed 10/19/2021 7.30 16.6 2826 -80.6 5.59 Sample collected from spigot inside water treatment plant This is the water treatment plant intake <br /> from the mine pool.Previous Sample ID=Mine Refi ll. <br /> Sumps I Not Sampled' - - Sample collected from sump water from Sump#1(Master Sump). <br /> Notes: <br /> Well was dry or water present in well was insufficient volume to collect sample. <br /> 2MW-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 M W-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 /> my=millivolts <br /> MW=Monitoring Well <br /> ORP=Oxidization Reduction Potential <br /> PACE 10 of 35 <br />