2013-02-01_HYDROLOGY - C1994082 (3)

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