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COLORADO LEGACY LAND <br /> TABLE 3A: GROUNDWATER SAMPLE FIELD PARAMETERS <br /> Field Parameters <br /> Location ID/ Static Depth to Dissolved Notes Location Description <br /> Sample IDz Sample Date pH Temperature Conductivity ORP Oxygen / P <br /> p (ft bloc)Water (unitless) (°C) (µS/cm) (mom (mg/L) <br /> MW-00 10/06/2022 12.2 7.02 12.6 614.8 218.1 1.46 Alluvial well. Above waste dumps,upstream of site. <br /> MW-0 10/06/2022 14.6 7.00 11.8 862 223.1 4.54 Alluvial well.Toe of south waste rock pile. <br /> MW-6 Not Sampled' Dry - - - - - Alluvial well. Near former Sump#2. <br /> MW-7 Not Sampled' Unsafe - _ - - - Alluvial well. Near Sump#1. <br /> Conditions <br /> MW-12 Not Sampled' Dry - - - - - Below Sump#1.Alluvial well. <br /> MW-13 10/11/2022 440.2 7.26 9.5 362.3 86.7 2.7 Nitrogen purge.Replaced MW-10.Previous Sample ID=L1.Background well. <br /> MW-14 10/11/2022 125.7 7.29 9.5 196.2 11.6 1.32 Nitrogen purge.Replaced MW-11. Previous Sample ID=L2.Background well. <br /> MW-15 10/12/2022 420.8 7.90 13.5 957 -110.7 1.08 Nitrogen purge.Previous Sample ID=L3.Bedrock well. <br /> MW-16 Not Sampled' 244 - - - - - Previous Sample ID=L4.Bedrock well.No sample required. <br /> MW-17 Not Sampled' Dry - - - - - Nitrogen purge.Previous Sample ID=L5. <br /> MW-18 Not Sampled' Dry - - - - - Previous Sample ID=L6.Bedrock well,installation targeted Illinois fault zone in alluvial valley. <br /> MW-19 Not Sampled' 20.5 - - - - - Toe of south waste rock pile.Previous Sample ID=L7. <br /> MW-20 Not Sampled' Dry - - - - - Usually,dry.Top of south waste rock pile. <br /> Raw Feed Not Sampled' Winterized - - - _ _ Sample collected from spigot inside water treatment plant. This is the water treatment plant intake <br /> from the mine pool.Previous Sample ID=Mine Refill. <br /> Sumps Not Sampled' Dry - - - - - Sample collected from sump water from Sump#1 (Master Sump). <br /> Notes: <br /> ' MW-7 was not sampled due to unsafe conditions of excavation area around well.MW-6,MW-12,MW-16,MW-17,MW-18,MW-20 and the Sumps were not sampled during this sampling event because they were dry,MW-19 had insufficient water <br /> available for sampling and Raw Feed was not sampled due to winterization. <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 MW-12. MW-10 and MW-11 were fouled(bentonite in screened interval)and replaced with MW-13 and MW-14. <br /> VS/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 /> PAGE 11 of 16 <br />