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<br />y •. <br />~~ <br />A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS i '. ' <br />During the period beginning Juty 1, 1977 and fasting through March 31, 19$0, <br />the permittee is authorized to discharge from outfall(s)seriai number(s) 001, the 9360' Bulldog Mountain Mine <br />portal discharge. ' <br />Such discharges shall be limited and monitored by the permittee as specified below: <br />Effluent Characteristic Discharge Limitations Monitoring Req uirements <br /> Weight Concentr.atlon., <br /> kg/day(lbs/day) mg/1 mg/1 Measurement Sample <br /> 30-day Avg a/ Dally Max b/ 30-day Avg a/ Daily Max b/ ._ Frequency Type <br />Flow-m3/Day(MGD) N/A N/A N/A N/A Weekly c/ ~ --, <br />Total Suspended Solids N/A N/A 20 30 Monthly Composite <br />Total Lead N/A N/A 0.2 0.4 Monthly Composite <br />Total Zinc N/A N/A 0.5 1.0 Monthly Composite <br />Total Copper N/A N/A 0.05 0.1 Monthly Composite <br />Total hlercury N/A N/A 0.001 0.002 Monthly Composite <br /> <br />Oil and Grease shall not exceed 10 mg/1 on any grab sample and shall be monitored weekly for sheen by visual <br />observation. <br />The pH shall not 1~e less than. 6.O standard units nor greater than 9.0 standard units shall be <br />monitored weekly by a grab sample. <br />There shall be no discharge of floating solids or visible foam in other than trace amounts. <br />Samples taken in compliance with the monitoring requirements specified above shall be taken at the following <br />location)s): at the outfall from the final treatment unit after discharge from the 9360' portal and prior to <br />admixture with waters of the receiving stream, Windy Gulch or other diluent waters. <br />. a/ This limitation shall be determined by the arithmetic mean of a minimum of three (3) consecutive samples <br />_ taken on separate weeks In a 30-day period (minimum total of three (3) samples); <br />b/ This limitation means the total discharge by weight, or the concentration, during any calendar day. <br />c/ Weir, flume or other comparably accurate method. <br />^. <br />z~ <br />ao- <br />a ~' <br />0 <br />~• o <br />-n <br />o -~ <br />i u, <br />0 <br />0 <br />0 <br />0 <br />V <br />0 <br />In addition to the above daily maximum concentration limitation ,. the analysis of any single properly <br />preserved grab sample shall not exceed 150 percent of the daily maximum concentration (1.5 times the limitation) <br />for the parameter Total Suspended Solids. <br />