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maximum concentration or loading of a pollutant allowed to be <br />discharged at any time, determined from analysis of any grab or <br />composite sample collected, independent of the industrial flow rate <br />and the duration of the sampling event. <br />ii. Instantaneous Minimum Allowable Discharge Limit — shall mean the <br />minimum concentration of a pollutant allowed to be discharged at any <br />time, determined from analysis of any grab or composite sample <br />collected, independent of the industrial flow rate and the duration of <br />the sampling event. The lower pH limit is applied as an Instantaneous <br />Minimum Allowable Discharge Limit. <br />b. Monthly Average. Limit means the maximum allowable average of daily <br />discharges over a calendar month, calculated as the sum of the <br />concentrations of all daily discharges measured during a calendar month <br />divided by the number of daily discharges measured that month. <br />3. Discharge Screening Level Limitations have been established to evaluate the need for <br />a limitation for pollutants that are not listed in the Effluent Limitation section of the <br />permit. If a permittee has no limit for a particular pollutant, but observes, through <br />monitoring and analysis, a concentration of that pollutant greater than the listed <br />Discharge Screening Level concentration found in the table below, the permittee shall <br />notify the Control Authority. This notification shall be made in writing within five <br />days of observing the pollutant concentration. <br />Parameter <br />Daily Maximum Screening Level (mg/L) <br />Arsenic (mg/L)_ <br />0.2 <br />Cadmium (mg/L) <br />0.1 <br />Chromium (mg/L) <br />2.0 <br />Copper (mg/L) <br />Cyanide {mg/L) <br />0.3 <br />0.1 <br />Lead (mg[L) <br />0.3 <br />Nickel (mg(L) <br />0.3 <br />Silver (mg/L) <br />0.2 <br />Zinc (mg/L) <br />0.3 <br />3 <br />