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Table A -3b <br />In- stream Standards for Stream Segment COGULD02 <br />Physical and Biological <br />Dissolved Oxygen (DO) = 5 mg/1, minimum <br />pH = 6.5 - 9 su <br />E. coli chronic = 126 colonies /100 ml <br />Inorganic <br />Total Ammonia acute and chronic = TVS <br />Until 12/31/2011 Total Ammonia acute and chronic = TVS (old) <br />Chlorine acute = 0.019 mg/1 <br />Chlorine chronic = 0.011 mg/1 <br />Free Cyanide acute = 0.005 mg/1 <br />Sulfide chronic = 0.002 mg/1 <br />Boron chronic = 0.75 mg/1 <br />Nitrite acute = 0.5 mg/1 <br />Nitrate acute = 100 mg/1 <br />Metals <br />Dissolved Arsenic acute = 340 µg/1 <br />Total Recoverable Arsenic chronic = 7.6 µg/1 <br />Dissolved Cadmium acute and chronic = TVS <br />Dissolved Trivalent Chromium acute = TVS <br />Dissolved Hexavalent Chromium acute and chronic = TVS <br />Dissolved Copper acute and chronic = TVS <br />Total Recoverable Iron chronic = 1000141 <br />Dissolved Lead acute and chronic = TVS <br />Dissolved Manganese acute and chronic = TVS <br />Total Mercury chronic = 0.011.1g/1 <br />Dissolved Nickel acute and chronic = TVS <br />Dissolved Selenium acute and chronic = TVS <br />Dissolved Silver acute and chronic = TVS <br />Dissolved Zinc acute and chronic = TVS <br />Dissolved Uranium acute and chronic = TVS <br />Cotter Corporation Water Quality Assessment <br />C00036251 <br />Table Value Standards and Hardness Calculations <br />Standards for metals are generally shown in the regulations as Table Value Standards (TVS), and these <br />often must be derived from equations that depend on the receiving stream hardness or species of fish <br />present; for ammonia, standards are discussed further in Section IV of this WQA. The Classification and <br />Numeric Standards documents for each basin include a specification for appropriate hardness values to <br />be used. Specifically, the regulations state that: <br />The hardness values used in calculating the appropriate metal standard should be based on <br />the lower 95% confidence limit of the mean hardness value at the periodic low flow criteria <br />as determined from a regression analysis of site - specific data. Where insufficient site - <br />specific data exists to define the mean hardness value at the periodic low flow criteria, <br />Appendix A (WQA v 7.0) <br />Page 9 of 23 Last Revised 06/10/10 /AO <br />