Laserfiche WebLink
COLORADO LEGACle AND <br /> TABLE 3A: GROUNDWATER SAMPLE FIELD PARAMETERS <br /> Field Parameters <br /> Location ID / Sample Date Static Depth to Dissolved Notes Location Description <br /> Sample IDz p Water pH Temperature Conductivity ORP Oxygen / p <br /> (ft btoc) (unitless) (°C) (µS/cm) (mV) (mg/L) <br /> MW-00 7/12/2022 8.85 8.63 9.7 249.3 -7.6 0.94 Alluvial well. Above waste dumps, upstream of site. <br /> MW-0 7/12/2022 14.2 8.76 10.2 477.5 -12.3 1.97 Alluvial well.Toe of south waste rock pile. <br /> MW-6 7/14/2022 11.67 7.79 11.6 766 41.5 3.60 Alluvial well. Near former Sump #2. <br /> MW-7 Not Sampled' 112.5 - - - - - Alluvial well. Near Sump#1. <br /> MW-12 Not Sampled' Dry - - - - - Below Sump#1.Alluvial well. <br /> MW-13 7/11/2022 394.38 8.07 9.7 240.3 -129.9 0.16 Nitrogen purge. Replaced MW-10. Previous Sample ID= L1. Background well. <br /> MW-14 7/11/2022 107.9 8.54 9.2 196.8 -94.7 2.42 Nitrogen purge.Replaced MW-11. Previous Sample ID = L2. Background well. <br /> MW-15 7/12/2022 407.02 8.75 11.7 799 -263.3 0.14 Nitrogen purge.Previous Sample ID= L3. Bedrock well. <br /> MW-16 7/12/2022 319.58 - - - Previous Sample ID = L4. Bedrock well. No sample required. <br /> MW-17 Not Sampled' 112.5 - - - - - Nitrogen purge.Previous Sample ID= L5. <br /> MW-18 7/12/2022 218.5 8.78 11.8 647 -185.6 0.05 Previous Sample ID= L6. Bedrock well,installation targeted Illinois fault zone in alluvial valley. <br /> MW-19 Not Sampled' 19.3 - - - - - Toe of south waste rock pile. Previous Sample ID= L7. <br /> MW-20 Not Sampled' 51.7 - - - Usually,dry.Top of south waste rock pile. <br /> Raw Feed 7/14/2022 - 7.17 22.8 3312 -160.4 1.9 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' - - - - - 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-12 and the Sumps were not sampled during this sampling event because they were dry, MW-17, MW-19,and MW-20 had insufficient water available for sampling. <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 /> mV=Millivolts <br /> MW= Monitoring Well <br /> ORP= Oxidization Reduction Potential <br /> PAGE,11 of 17 <br />