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PART I <br />Page 4 of 19 <br />C. FOOTNOTES <br />~/ - S7hen the most sensitive analytical method which complies with Part <br />:[. F.2 of the permit has a detection limit greater than or equal to the <br />permit limit, the permittee shall report "less than the detectable <br />:limit", as appropriate. Such reports shall not be considered as <br />•violations of the permit limit. <br />'The present lowest method detection limit for specific parameters <br />(which have limitations which are, in some cases, less than or equal to <br />the detection limit) are as follows: <br />Total Residual Chlorine 0. 05 mg/1 <br />Total Recoverable Cadmiwn 0. 0003 mg/1 <br />Total Recoverable Copper 0. 005 mg/1 <br />Total Recoverable Lead 0. 005 mg/1 <br />Total Mercury 0. 00025 mg/1 <br />Total Recoverable Nickel 0. 05 mg/1 <br />Total Recoverable Silver 0. 0002 mg/1 <br />Total Recoverable Zinc 0. 05 mg/1 <br />The present lowest method detection limits for the dissolved and also <br />potentially dissolved parameters are the same as indicated for the <br />above parameters. <br />m/ - 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 tha <br />geometric mean of a7.1 samples taken during a seven (7) day period. <br />- There shall be no acute toxicity in the effluent from this discharge <br />point. The acute toxicity limitation is exceeded if 1) a statistically. <br />significant difference in mortality (at the 95X confidence level) is <br />observed for either species betveen the control and any dilution less <br />than or equal to the identified IWC or 2) a species mortality in any <br />dilution of effluent (including 100X effluent) exceeds 50X. <br />~ - The potentially dissolved metal fraction is defined in "The Basic <br />Standards and Methodologies for Surface Water 3.1.0" as: that portion <br />of a constituent measured from the filtrate of a water and suspended <br />sediment sample that was first treated with nitric acid to a pH of 2 or <br />less and let stand for S to 96 hours prior to sample filtration using a <br />0.4 or 0.45-UM membrane filter. Note the "potentially dissolved" <br />method cannot be used where nitric acid will interfere with the <br />analytical procedure used for the constituent measured. <br />Code: i - 17 Date: 9-84, revised 12-87, revised 8-89, revised 12-30-91 <br />