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COLORADO DEPARTMENT OF HEALTH, Water Quality Control Division <br />Rationale - Page 9. Permit No. CO-0033367 <br /> <br />APPENDIX A <br />Water Quality Standards for Ciruela Canyon <br />Physical and Biological <br />Dissolved Oxygen 6.0 mg/1, 7.0 mg/1 spawning (minimum) <br />pH 6.5 - 9.0 s.u. <br />Pecal Coliform <br />Bacteria 2000 org/100 ml <br />Water Quality Standards for Purgatoire River <br />Physical and Biological <br />Dissolved Oxygen <br />pH <br />Fecal Coliform <br />Bacteria <br />Inorganic <br /> <br />Ammonia as N <br />Residual C12 <br />Cyanide (free) <br />Sulfide as H2S <br />Boron <br />Nitrite as N <br />Nitrate as N <br />Chloride (C1) <br />Sulfate (SOy) <br />Metals <br /> <br />Arsenic (As) <br />Cadmium (Cd) <br />Chromium (Cr, <br />Chromium (Cr, <br />Copper (Cu) <br />Lead (Pb) <br />Iron (Fe, sol) <br />Iron (Fe, tot) <br />Manganese (Mn, <br />Manganese (Mn, <br />Mercury (Hg) <br />Nickel CN1) <br />Selenium (Se) <br />Silver (Ag) <br />Zinc (Zn) <br />° 6.0 mg/1, 7.0 mg/1 spawning (minimum) <br />° 6.5 - 9.0 s.u. <br />= 2000 org/100 ml <br />~3) <br />N02) <br />NO3) <br />° 0.02 mg/1 <br />° 0.003 mg/1 <br />° 0.005 mg/1 <br />° 0.002 mg/1 <br />° 0.75 mg/1 <br />= 0.05 mg/1 <br />° 10.0 mg/1 <br />° 250.0 mg/1 <br />° 250.0 mg/1 <br />(unionized) <br />(undissociated) <br /> = 0.05 mg/1 <br /> = 0.001 mg/1 <br />ri) ° 0.05 mg/1 <br />ex) ° 0.025 mg/1 <br /> = 0.012 mg/1 <br /> ° 0.025 mg/1 <br /> = 0.3 mg/1 <br /> = 4.0 mg/1 <br />sol) = 0.05 mg/1 <br />tot) = 1.0 mg/1 <br /> = 0.0007 mg/1 <br /> = 0.1 mg/1 <br /> = 0.01 mg/1 <br /> = 0.0001 mg/1 <br /> = 0.19 mg/1 <br />