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PART <br />Page No. 14 <br />Permit No.: CO- 0038024 <br />Parameters; �,. � � �Measuremen��requeRcy�. ��� Sample T�y�e,�,���. <br />Settleable Solids, ml/I 2 days / month* Grab <br />Total Iron, mg/1 2 days / month* Grab <br />Oil and Grease, mg/1 2 days / month* Visual <br />pH, s.u. 2 days / month* In -situ <br />TDS, mg/1 Quarterly Grab <br />* If discharge from these outfalls is attributable to a single storm event, monthly monitoring may be conducted <br />Monitoring Requirements for Outfalls MN01, MN04, MN08, MN09, MN026, and MN029 <br />4 x atlVeasurement4 g Samle Ty » <br />Parameter a <br />Total Recoverable Arsenic, ug/1 Quarterly Grab <br />Total Recoverable Beryllium, ug/1 Quarterly Grab <br />Total Recoverable Cadmium, ug/1 Quarterly Grab <br />Total RecoverableTrivalent Quarterly Grab <br />Chromium, ug/1 <br />Total Recoverable Copper, ug/1 Quarterly Grab <br />Total Recoverable Lead, ug/1 Quarterly Grab <br />• Total Recoverable Manganese, Quarterly Grab <br />ug/1 <br />Total Recoverable Nickel, ug/1 Quarterly Grab <br />Total Recoverable Selenium, ug/1 Quarterly Grab <br />Total RecoverableZinc, ug/1 Quarterly Grab <br />Self- monitoring sampling by the permittee for compliance with the monitoring requirements specified above shall be <br />performed at the following location(s): 001 and MNO1, 004 and MN04, 008 and MN08, 009 and MN09, 026 and MN26, 029 <br />and MN29. <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 />a. 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. .11, .. <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 following frequencies: <br />Outfalls Frequency Sample Type <br />