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F <br />Permit Number COG-500000 <br />Facility Number COG-500182 <br />CDRMS Permit No. M-1980-120 <br />Page la <br />2- If power is not available, flow may be measured on an instantaneous basis. Facility shall monitor flow 2 days / month. <br />' - If a visual sheen is noticed, a grab sample must be taken and analyzed for oil and grease <br />Other Conditions <br />are der <br />Chemicals no c <br />The permittee did not specify any chemicals the permittee must b ubmia rrged. equest for approval which includes thepmrove ost culrnrent <br />this permit. Prior to use of any applicable chemical emical Material Safety Data Sheet (MSDS) for onz d under the Until approved, use of a chemical in waters that may be discharged could <br />result in discharge of pollutants not auth <br />Antidegradation <br />Antidegradation review does not apply to this permit because the receiving stream is designated as Use Protected. <br />Groundwater Contamination <br />if groundwater contamination is encountered, then the permittee is to contact the Division and, if appropriate, the owner of the water <br />covered collection system receiving the discharge. oa remediation certif certification, which dwill include app opriater equiremen stfotr the <br />permittee shall immediately apply f groundwater <br />additional discharge monitoring and on-site environmental response capabilities. <br />Sam lin <br />Sampling shall occur at a point after treatment, or after the implementation of any Best Management Practices (BMPs). If B MPs or <br />treatment are not implemented, sampling shall occur where the discharge leaves control of the permittee, and prior to entering the <br />receiving stream. Samples must be representative of what is entering the receiving stream. <br />Monitoring and Reporting <br />WNW must be submitted quarterly as long as the certification is in effect. The permittee shall <br />Discharge Monitoring Reports WNW provide the Division with any additional monitoring data on the permitted discharge collected for entities other than the Division. <br />This will be supplied to the Division within 48 hours of the receipt of the data by the permittee. <br />This certification to discharge is effective long term For termination of permit coverage, the permittee must initiate this by sending <br />a letter to the Division requesting the permit certification be terminated. <br />Best Management Practices <br />The permittee shall implement and maintain Best Management Practices (BMP) for the prevention of erosion and the control of solid ficat and liquid pollutants due to the discharge. BMPs <br /> include various options, such as: flmeodie of ion lof the oth, filter discharge <br />, or p asric sheeting <br />disperse flows; containment of water by hay sale other c cmethods. <br />for protection of containment structures; rip-rap; and/or any other approved <br />4tormwater Management Plan <br />See Part I.C. of the permit for stormwater requirements. <br />At the time of application, the permittee certified that they had developed and implemented a Stormwater Management Plan (SWMP) constru for this facility. The permittee shall amend Whe <br /> al for the whenever there is a change in of pollutants to the waters of the tatec orf thoperation e SWMP provestto bece <br />which has a significant effect on the potential <br />ineffective in achieving the general objectives of controlling pollutants in stormwater discharges associated with mining activity. A <br />copy of the SWMP must be kept on site and provided to the Division upon request. <br />The General Permit for Sand and Gravel Mining and Processing Operations (and other nonmetallic minerals except fuel) is attached. <br />The permittee should review this permit for familiarity with all of the permit requirements. If the permittee has questions related to <br />this certification that cannot be answered by a review of the permit, the permit writer should be contacted. <br />Permit Writer <br />Erin Scott <br />303-692-3506 <br />May 27, 2008