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PART I <br />Page 4 of 18 <br />Permit No: MN 0060259 <br /> <br />EFFLUENT LIMITATIONS AND MONITORING REOUIREMENTS <br /> <br />During the period beginning on the effective date of this permit and <br />lasting until January 31, 1996, the Permittee is authorized to discharge <br />from ou~falls serial numbers 0010 and 0020. <br /> <br />Such discharges shall be limited and monitored by the Permittee as <br />specified below: <br /> <br />EFFLUENT CHARACTERISTICS <br /> <br />DISCHARGE LIMITATIONS <br /> <br />MONITORING <br />REOUIREMENTS <br /> <br /> Daily <br />Parameter Max <br /> <br />Ouarterly 'Measurement Sample <br />Average Frequency Type <br /> <br />Flow - MGD <br /> <br />Tetrachloroe~hylene (PCE) 3.8 ug/1 (5) <br />Dichloroethane (DCA) 3.5 ug/1 (5) <br />Total VOCs 38 ug/1 (5) <br />Nickel -- 137 ug/1 <br />Zinc -- 92 ug/t <br /> <br />continuous estimate <br /> daily <br /> average <br />(6) grab <br />(6) grab <br />(6) grab <br />(6) grab <br />(6) grab <br /> <br />The p~ shall not be less than 6.0 nor greater than 9.0 and shall be <br />monitored. These upper and lower limitations are not subject to <br />averaging and shall be met at all times. <br />There shall be no discharge of floating solids or visible foam in other <br />than tr&ce amounts. <br />The discharge shall not contain oil or other substances in amounts <br />sufficient ~o create a visible color film on the sur£ace of the receiving <br />waters. <br />Samples taken in compliance with the monitoring requirements specified <br />above shall be taken at the following location: representative of <br />influent to and effluent from the treatment system. <br />The treatment system shall achieve a removal efficiency of 95 percent of <br />indicator parameters (PCE, DCA, and total VOCs) based on the ratio of <br />contaminant concentration in the influent versus concentration in the <br />effluent. <br /> <br />As influent contaminant levels decrease, the removal efficiency of the <br />system may decrease. In this event the permittee shall demonstrate that <br />optimum efficiency is being achieved for the level of influent <br />contamination being treated. <br /> <br />6. Monitoring <br /> <br />a) <br /> <br />b) <br /> <br />Monitoring for VOCs shall be conducted on the influen~ and effluent <br />twice weekly for the the first two weeks, weekly for the next two <br />weeks, and monthly thereafter. EPA methods 601 and 602 or their <br />equivalent shall be used for monitoring. <br />Monitoring for metals shall be condufted on the effluent twice <br />weekly for the first two weeks, weekly for the next two weeks, <br />monthly for the next three months, and quarterly thereafter. <br /> <br /> <br />