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COLORADO LEGACY LAND <br /> $CHWARTZWALDER MINE <br /> TABLE E-2:COMPARISON OF SCHWARTZWALDER MINE POOL CONCENTRATIONS PRE-2017 AND POST-201 .e <br /> Number Number Percent � ndardta Pre-2017 <br /> Variable Units of of Non- of No . <br /> Minimum Maximum Mean' Median' eviation Sample Data <br /> Sample Detects Detects <br /> Meanz <br /> March 2018 to September 2020 Mine Pool Sample Data - <br /> Zinc mg/L 19 17 44% 0.03 0.05 0.0076 1 0.01 0.01 0.383 <br /> Total Metals <br /> Aluminum mg/L 19 19 49% 0 0 0.01782 0.03 0.01 0.09 <br /> Antimony mg/L 19 16 41% 0.0016 0.0034 0.00033 0.0004 0.00 0.02 <br /> Arsenic mg/L 30 2 5% 0.0026 0.0344 0.0115 0.0163 0.01 0.0058 <br /> Copper mg/L 19 14 36% 0.01 0.1 0.00697 0.01 0.02 0.008 <br /> Iron mg/L 32 0 0% 0.8 11 4.36 5.56 2.73 0.62 <br /> Lead mg/L 19 8 21% 0.0001 0.0044 0.00022 0.0001 0.00 0.018 <br /> Manganese mg/L 32 0 0% 0.136 1.07 0.625 0.77 0.15 2.63 <br /> Mercury mg/L 9 9 23% 0 0 2.31E-05 0.0001 0.00 0.0004 <br /> Molybdenum mg/L 29 0 0% 0.0814 1.33 0.416 1 0.52 0.35 1.39 <br /> Silver mg/L 19 19 49% 0 0 0.00029 0.0001 0.00 0.0023 <br /> Thallium mg/L 19 17 44% 0.0003 0.0007 6.15E-05 0.0001 0.00 0.024 <br /> Uranium mg/L 29 0 0% 2.87 1 23 9.08 12.2 3.71 34 <br /> Zinc mg/L 19 17 44% 0.03 0.04 0.0074 0.01 0.01 0.366 <br /> Radionuclides <br /> Radium 226-Dissolved pCi/L 19 0 0% 73 180 61 120 32 178 <br /> Notes: <br /> 1 Mean and median statistics calculated using one-half the detection limit. <br /> 2 Mean values from Table 37 in Whetstone Associates, Inc. Schwartzwalder Mine Hydrologic Evaluation of Mine Closure and Reclamation. (2007) <br /> November 7,which were calculated from results of mine pool samples collected from June 2000 to July 2007. <br /> Deg C-Degrees Celsius VS/cm-microSiemens per centimeter <br /> mg/L-Milligrams per liter <br /> my-Millivolts <br /> pCi/1-picoCuries per liter <br /> s.u.-Standard unit <br /> JUNE 2021 23 AMENDMENT 6 <br />