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COLORADO LEGACY LAND <br /> TABLE 3A:GROUNDWATER SAMPLE FIELD PARAMETERS <br /> Field Parameters <br /> Location ID/ Sample Date Notes Location Description <br /> Sample IDz p Static Depth to pH (unitless) Temperature Conductivity ORP(mom Dissolved / P <br /> Water(ft btoc) (°C) (µS/cm) Oxygen(mg/L) <br /> MW-00 Not Sampled' Alluvial well. Above waste dumps,upstream of site. <br /> MW-0 Not Sampled' -- -- -- - - Alluvial well.Toe of south waste rock pile. <br /> MW-6 Not Sampled' -- -- -- -- -- -- Alluvial well. Near former Sump#2. <br /> MW-7 02/15/2022 10.63 7.23 6.1 580 135.7 6.80 Alluvial well. Near Sump#1. <br /> MW-12 Not Sampled' -- -- -- -- -- -- Below Sump#1.Alluvial well. <br /> MW-13 Not Sampled' - - - -- -- Nitrogen purge.Replaced MW-10.Previous Sample ID=L1.Background well. <br /> MW-14 Not Sampled' - -- - - - Nitrogen purge.Replaced MW-11. Previous Sample ID=L2.Background well. <br /> MW-15 Not Sampled' - - -- - -- -- Nitrogen purge.Previous Sample ID=L3.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' -- -- -- -- -- -- Previous Sample ID=L6.Bedrock well,installation targeted Illinois fault zone in alluvial valley. <br /> MW-19 02/15/2022 19.01 7.04 11.1 670 155.7 6.07 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 Not Sampled' Sample collected from spigot inside water treatment plant. This is the water treatment plant intake <br /> -- -- -- -- -- -- <br /> from the mine pool.Previous Sample ID=Mine Refill. <br /> Sumps Not Sampled' - - -- - Sample collected from sump water from Sump#1 (Master Sump). <br /> Notes: <br /> 'Snow and ice prevented the safe collection of a 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 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 /> my=Millivolts <br /> MW=Monitoring Well <br /> ORP=Oxidization Reduction Potential <br /> PACE 11 OF 17 <br />