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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 <br /> Notes/Location Description <br /> Sample ID Sample Date ft btoc unitless) °C (PS/cm my mg/L)_ � <br /> MW-00 6/2/2020 8.07 7.18 9.0 234.2 176.2 7.06 Alluvial well. Above waste dumps,upstream of site. <br /> MW-0 6/2/2020 12.02 6.84 9.0 454.5 42.2 2.15 Alluvial well.Toe of south waste rock pile. <br /> MW-1 N/A. N/A N/A N/A N/A N/A N/A Abandoned in December 2019 during alluvial valley excavation <br /> MW-2 N/A N/A N/A N/A N/A N/A N/A Abandoned in December 2019 during alluvial valley excavation <br /> MW-3A N/A N/A N/A N/A N/A N/A N/A Abandoned in December 2019 during alluvial valley excavation <br /> MW-4 N/A N/A N/A N/A N/A N/A N/A Removed in 2008. <br /> MW-5 N/A N/A N/A N/A N/A N/A N/A Removed in 2008. <br /> MW-6 6/2/2020. 8.73 7AS 11.1 786 97.0 4.95 Alluvial well. Near former Sump#2. <br /> MW-7 6/3/2020. 8.40 6.79 10.1 1,112 86.9 3.95 Alluvial well. Near Sump#1 <br /> MW-8 N/A N/A N/A N/A N/A N/A N/A Not sampled,replaced with well MW-12. <br /> MW-9 N/A N/A N/A N/A N/A N/A N/A Abandoned in December 2019 during alluvial valley excavation <br /> MW-10 N/A N/A N/A N/A N/A N/A N/A Not sampled,bentonite in screened interval. Replaced with MW-13.Background well. <br /> MW-11 N/A N/A N/A N/A N/A N/A N/A Not sampled,bentonite in screened interval. Replaced with MW-14.Background well. <br /> MW-12 Not Sampled,Insufficient Volume'. 16.8 -- -- -- -- -- Below Sump#1.Alluvial well. <br /> MW-13 6/17/2020 446.37 7.80 13.9 357.2 82.2 8.26 Nitrogen purge.Replaced MW-10.Previous Sample ID=L1.Background well. <br /> MW-14 6/17/2020 94.60 7.59 11.1 229.5 -98.2 0.45 Nitrogen purge.Replaced MW-11. Previous Sample ID=L2.Background well. <br /> MW-15 6/17/2020 373.40 7.72 11.5 791 33.9 7.25 Nitrogen purge.Previous Sample ID=L3.Bedrock well. <br /> MW-16 N/A Transducer malfunction.z N/A N/A N/A N/A N/A Not sampled,no pump in well. Monitor water level only. Previous Sample ID=L4.Bedrock well. <br /> MW-17 6/17/2020. 112.15 7.43 12.3 1284 64.8 0.33 Nitrogen purge.Previous Sample ID=L5. <br /> MW-18 6/4/2020 124.70 7.80 15.1 997 -184.2 1.23 Previous Sample ID=L6.Bedrock well,installation targeted Illinois fault zone in alluvial valley. <br /> MW-19 6/4/2020 18.18 7.08 12.0 558 91.9 3.99 Toe of south waste rock pile.Previous Sample ID=L7. <br /> MW-20 Not Sampled,Insufficient Volume'. 50.40 -- -- -- -- -- Usually dry.Top of south waste rock pile. <br /> Sample collected from spigot inside water treatment plant. This is the water treatment plant intake <br /> Raw Feed 6/4/2020 N/A 7.39 19.1 1,940 -71.0 3.87 from the mine pool.Previous Sample ID=Mine Refill. <br /> Sample collected from spigot inside water treatment plant. This is the combined,collected sump <br /> Sumps 6/4/2020 N/A 7.21 13.13 1,061 37.8 4.87 water. <br /> Notes: <br /> 'Water present in well,insufficient volume to collect sample. <br /> 20bstruction in well.Transducer not installed. <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 7OF12 <br />