Laserfiche WebLink
CO-0000906 <br />New Elk Mine Water Quality Assessment <br />• Table A-2a <br />In-stream Standards for Stream Segment COARLA05a <br />Physical and Biological <br />Dissolved Oxygen (DO) ,= 6 mg/l, minimum(7 mg/l, minimum during spawning) <br />pH=6.5-9su <br />E. coli chronic = 126 colonies/ 100 ml <br /> <br />U <br />Dissolved Iron chronic = For W S, the greater o am ien <br />Total Recoverable Iron chronic = 1000 µg/l <br />Dissolved Lead acute and chronic = TVS <br />Dissolved Manganese chronic = For WS, the greater of ambient water quality as of January 1, 2000, or 50 <br />Dissolved Manganese acute and chronic =TVS <br />Total Mercury chronic = 0.01 µg/l <br />Dissolved Nickel acute and chronic = TVS <br />Dissolved Selenium acute and chronic =TVS <br />Dissolved Selenium chronic = 11.2 µg/1 (Temp. Std. through 12/31/2012 <br />Dissolved Silver acute and Dissolved Silver chronic for trout = TVS <br />Dissolved Zinc acute and chronic = TVS <br />lnorgantc <br />Total anunonia acute and chronic = TVS <br />Chlorine acute = 0.019 mg/I <br />Chlorine chronic = 0.011 mg/I <br />Free Cyanide acute = 0.005 mall <br />Sulfide chronic = 0.002 mg/1 <br />Boron chronic = 0.75 mg/I <br />Nitrite acute = 0.05 mg11 <br />Nitrate acute = 10 mg1I <br />Chloride chronic = 250 mg/I <br />Sulfate chronic = For WS, the greater of ambient water quality as of January 1, 2000 or 250 mg/1 <br />Metals and Cyanide <br />Dissolved Arsenic acute = 340 gg/1 <br />Total Recoverable Arsenic chronic = 0.2 µg/l <br />Dissolved Cadmium acute for trout and Dissolved Cadmium chronic = TVS <br />Total Recoverable Trivalent Chromium acute = 50 µg/l <br />Dissolved Hexavalent Chromium acute and chronic = TVS <br />Dissolved Copper acute and chronic = TVS <br />f b' t water quality as of January 1, 2000, or 300 <br />Pa e 5 of 29 Last Revised August 26, 2008 <br />Appendix A (wQA version 5-4(FABL» g