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<br />PART I <br />Page 4 of 19 <br />C. FOOTNOTES <br />- When the most sensitive analytical method which complies with Part <br />I.F.2. of the permit has a detection limit greater Chan or equal to <br />the permit limit, the permictee shall report "Less than the <br />detectable limit," as appropriate. Such reports shall not be <br />considered as violations of the permit limit. <br />The present lowest method detection limits for specific parameters <br />(which have Limitations which are, in some cases, less than or equal <br />co the detection limit) are as follows: <br />Total Residual Chlorine 0. 05 mg/1 <br />To cal Recoverable Cadmium 0. 0003 mg/1 <br />Toca1 Recoverable Cooper 0. 005 mg/1 <br />To cal Recoverable Lead 0. 005 mg/1 <br />Toca1 Mercury 0. 00025 mg/1 <br />Total Recoverable Nickel 0. 05 mg/1 <br />Total Recove-able Silver 0. 0002 mg/1 <br />To cal Recoverable Zinc 0. 0~ mg/1 <br />Benzene 0. 001 mg/1 <br />The present lcwesc method detection limits for the dissolved and also <br />potentially dissolved metal parameters are the same as indicated <br />above for the total recoverable parameters. <br />- Fecal coliform bacteria average concentrations shall be determined by <br />the geometric mean of all samples collected during a thirty (30) <br />consecutive day period. The 7 day average shall be determined by the <br />geometric mean of all samples taken during a seven (7) day period. <br />J - The potentially dissolved metal fraction is defined in The Basic <br />Standards and Mechodoloeies for Surface 'dater 3.1.0 (5 CCR 1002-81 <br />as: chat portion of a conscicuenc measured from the filtrate of a <br />water and suspended sediment sample that was first created with <br />nitric acid to a pH of 2 or less and 1ec stand for 8 to 96 hours <br />prior to sample filtration using a 0.4 or 0.45-UM membrane filter. <br />Note the "potentially dissolved" method cannot be used where nitric <br />acid will interfere with the analytical procedure used for the <br />conscicuenc measured. <br />J - There shall be no acute toxicity in the effluent from this discharge <br />point. The acute toxicity limitation is exceeded if 1) a <br />statistically significant difference in mortality (ac the 95X <br />confidence Level) is observed for either species between the control <br />and any dilution less chat or equal co the identified IWC oc 2) a <br />species mortality in any dilution of effluent (including 1007. <br />effluent) exceeds 50X. <br />