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Table 26A - Comparison of New Elk Slurry Water <br />Quality with Water Quality Standards <br />Parameter <br />Seepage from <br />the Allen Mine <br />Waste Dump' <br />LA 221A <br />Coal <br />Aquifer' <br />Slurry <br />12/28/94 <br />MLRD <br />Irrigation <br />Material <br />Damage <br />Suspect <br />Level' <br />MLRD Stock <br />Watering <br />Material <br />Damage Suspect <br />Level' <br />Recommended <br />Standards for <br />Domestic <br />Groundwatef <br />Recommended <br />Standards for <br />Agricultural Use^ <br />Colorado Surface <br />Water Aquatic Life <br />Standard' <br />pH <br />8.0 <br />8.8 <br />8.2 <br />Irrigation <br />Watering <br />5.0 -9.0 <br />Standards for <br />6.5 -9.0 <br />Specific Conductance <br />Waste Dump' <br />1000 <br />900 <br />700 <br />Material <br />Domestic <br />Agricultural Use' <br />Standard° <br />Hardness <br />NA <br />49 <br />Damage <br />Damage Suspect <br />Groundwater" <br />Alkalinity <br />772 <br />596 <br />Suspect <br />Level' <br />Bicarbonate <br />827 <br />606 <br />215 <br />Level' <br />Carbonate <br />56 <br />59.6 <br />ND <br />0.2 <br />Acute: 0.781 <br />Chloride <br />11 <br />15 <br />72 <br />250 <br />250 <br />Chronic: 0.081 <br />Fluoride <br />0.44 <br />2.8 <br />1.5 <br />0.1 <br />2 <br />Sulfate <br />1023.4 <br />15 <br />130 <br />0.02 <br />0.02 <br />250 <br />0.02 <br />Acute: 0.001 <br />Calcium <br />35.8 <br />1.8 <br />15 <br />Chronic: 0.002 <br />Magnesium <br />22.65 <br />0.7 <br />2.9 <br />2.0 <br />5 <br />2 <br />Acute: 0.096 <br />Potassium <br />15.5 <br />2.1 <br />2.8 <br />Chronic: 0.088 <br />Sodium <br />1028 <br />251 <br />180 <br />500 <br />Iron (total recoverable) <br />0.81 <br />25.9 <br /><0.015 <br />5 <br />1.0 <br />Iron (dissolved) <br />0.03 <br />0.03 <br />0.3 <br />1.0 <br />Manganese (total <br />recoverable) <br /><0.04 <br />0.14 <br /><0.005' <br />0.1 <br />1.0 <br />Manganese (dissolved) <br /><0.009 <br /><0.005 <br />0.05 <br />0.2 <br />0.05 <br />Boron <br />0.24 <br />0.06 <br />0.02 <br />0.5-2.0 <br />0.75 <br />0.75 <br />0.75 <br />Lead <br />0.03 <br />NA <br />ND <br />5 <br />0.05 <br />0.1 <br />Acute: 0.067 <br />Chronic: 0.003 <br />(Revised 02/6/95) <br />Table 26A - Comparison of New Elk Slurry Water <br />Quality with Water Quality Standards <br />` WWL, 1980, Exhibit 6, New Elk Permit Application, Table 13. <br />2 WWL, 1980, Exhibit 6, New Elk Permit Application, Table 6. <br />3 MM, 1987, The Assessment of Material Damage, Alluvial Valley Floors, Surface Water, Groundwater, Subsidence. <br />CDOH, WQD, 1991, Basic Standards and Methodologies for Surface Water and the Basic Standards for Groundwater. <br />' These values derived from samples that were nm through a 45,u filter. <br />Fi ww Zo <br />Shaded boxes contain parameters in which exceedances <br />of recommended standards are observed. <br />Acute and chronic standards calculated for a hardness of 80 mg/l. <br />(Revised 02/6/95) <br />Seepage from <br />LA 221A <br />MLRD <br />MLRD Stock <br />Recommended <br />Recommended <br />Colorado Surface <br />the Allen Mine <br />Coal <br />Slurry <br />Irrigation <br />Watering <br />Standards for <br />Standards for <br />Water Aquatic Life <br />Parameter <br />Waste Dump' <br />Aquifer? <br />12/28/94 <br />Material <br />Material <br />Domestic <br />Agricultural Use' <br />Standard° <br />Damage <br />Damage Suspect <br />Groundwater" <br />Suspect <br />Level' <br />Level' <br />Nickel <br />0.08 <br />0.01 <br />0.2 <br />Acute: 0.781 <br />Chronic: 0.081 <br />Molybdenum <br />0.1 <br />Selenium <br />0.005 <br /><0.002 <br />0.007 <br />0.02 <br />0.02 <br />0.01 <br />0.02 <br />Acute: 0.001 <br />Chronic: 0.002 <br />Zinc <br />0.18 <br /><0.01 <br />0.03 <br />2.0 <br />5 <br />2 <br />Acute: 0.096 <br />Chronic: 0.088 <br />Total Dissolved Solids <br />2599 <br />775 <br />510 <br />500 <br />` WWL, 1980, Exhibit 6, New Elk Permit Application, Table 13. <br />2 WWL, 1980, Exhibit 6, New Elk Permit Application, Table 6. <br />3 MM, 1987, The Assessment of Material Damage, Alluvial Valley Floors, Surface Water, Groundwater, Subsidence. <br />CDOH, WQD, 1991, Basic Standards and Methodologies for Surface Water and the Basic Standards for Groundwater. <br />' These values derived from samples that were nm through a 45,u filter. <br />Fi ww Zo <br />Shaded boxes contain parameters in which exceedances <br />of recommended standards are observed. <br />Acute and chronic standards calculated for a hardness of 80 mg/l. <br />(Revised 02/6/95) <br />