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PARTI <br />Page No. 20 <br />Permit No.: CO-0000221 <br />L Outfalls MN13 and MN14 <br />Effluent Parameter <br />coverable Arsenic, ug/1 <br />..... ...... ....... ...... ..... <br />Potentially Dissolved Cadmium, u /1 <br />Potentially Dissolved Trivalent Chromium, u Rre uec ney <br />Quarterly <br /> <br />arterl <br />arterl S e <br />Grab <br /> <br />Gab <br />Grab <br />Dissolved Copper, ug/1 <br />Total Recoverable Iron, u/1 _ Quarterly <br />-'_Q!aarterly Grab <br />,_ Grab <br />Potentiall Dissolved Lead, u /1 arterl Grab <br />PotentiallDissolved Manganese, u /1 <br />Total Mercury, u/1 arterl <br />Quarterly Grab <br />Gab <br />?PotenitallDissolved Nickel, u /1 Quarterly Grab <br />Potentiall Dissolved Selenium, u /l arterly _ Grab <br />Potentially Dissolved Silver, u /1 arterly _ Grab <br />Potentially Dissolved Zinc, u /g 1 Quarterly Grab 1. Outfall WTE (Outfall 008) <br /> <br />Wet, chronic I Annually I Grab <br />m. Oil and Grease Monitoring <br />For every outfall with oil and grease monitoring, in the event an oil sheen or floating oil is observed, a grab sample shall <br />be collected, analyzed, and reported on the appropriate DMR. In addition, corrective action shall be taken immediately <br />to mitigate the discharge of oil and grease. A description of the corrective action taken should be included with the <br />DMR. <br />Self-monitoring sampling by the permittee for compliance with the monitoring requirements specified above shall be <br />performed at the following locations: Outfalls 005, 006, 008, 009, 010, 011, 012, 013, 014, 015, 016 and 017 at the outfalls of <br />the sedimentation ponds prior to entering the immediate receiving waters. <br />If the permittee, using the approved analytical methods, monitors any parameter more frequently than required by this permit, <br />then the results of such monitoring shall be included in the calculation and reporting of the values required in the Discharge <br />Monitoring Report Form (DMRs) or other forms as required by the Division. Such increased frequency shall also be <br />indicated. <br />Monitoring Exemptions: <br />For Outfalls 005, 006, 008, 009, 010, 011, 015, 016 and 017, during the winter season, monitoring may be suspended at the <br />permittee's option when adverse weather conditions prohibit safe access to one or more of these discharge points at the <br />frequencies specified in this subpart. Monitoring shall recommence at the first opportunity after such inaccessibility ends. <br />When inaccessibility prevents sample collection, the permittee shall document what monitoring was missed and the specific <br />conditions that prevented access in cover letters to the appropriate Discharge Monitoring Reports. For Outfall 008, the <br />permittee is exempted from the chronic WET testing frequency of 3 grabs/test if effluent discharges cease before the end of <br />the monitoring period (see Part I.A.6.a). <br />2. Salinity Parameters <br />In order to obtain an indication of the quantity of Salinity, measured as total dissolved solids (TDS), being discharged from <br />the site the permittee shall monitor the wastewater effluent at the frequencies given in the tables above.