2009-06-11_INSPECTION - M1980120

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A 11 Permit Number COG-500000 Facility Number COG-500182 CDRMS Permit No. M-1980-120 Page 1 a z- If power is not available, flow may be measured on an instantaneous basis. Facility shall monitor flow 2 days / month. s - If a visual sheen is noticed, a grab sample must be taken and analyzed for oil and grease Other Conditions Chemicals The permittee did not specify any chemicals for use in waters that may be discharged. On this basis, no chemicals are approved under this permit. Prior to use of any applicable chemical, the permittee must submit a request for approval which includes the most current Material Safety Data Sheet (MSDS) for that chemical. Until approved, use of a chemical in waters that may be discharged could result in discharge of pollutants not authorized under the permit. Anti Wgradation Antidegradation review does not apply to this permit because the receiving stream is designated as Use Protected. Groundwater Contamination if groundwater contamination is encountered, then the permittee is to contact the Division and, if appropriate, the owner of the collection system receiving the discharge. Since the discharge of contaminated groundwater is not covered under this permit, the permittee shall immediately apply for a groundwater remediation certification, which will include appropriate requirements for additional discharge monitoring and on-site environmental response capabilities. SamnlinQ Sampling shall occur at a point after treatment, or after the implementation of any Best Management Practices (BMPs). If BMPs or treatment are not implemented, sampling shall occur where the discharge leaves control of the permittee, and prior to entering the receiving stream. Samples must be representative of what is entering the receiving stream. Monitoring and Reportinz Discharge Monitoring Reports (DMR) must be submitted quarterly as long as the certification is in effect. The pennittee shall provide the Division with any additional monitoring data on the permitted discharge collected for entities other than the Division. This will be supplied to the Division within 48 hours of the receipt of the data by the permittee. This certification to discharge is effective long term. For termination of permit coverage, the permittee must initiate this by sending a letter to the Division requesting the permit certification be terminated. Best Management Practices The permittee shall implement and maintain Best Management Practices (BMP) for the prevention of erosion and the control of solid and liquid pollutants due to the discharge. BMPs include various options, such as: modification of the pipe discharge structure to disperse flows; containment of water by hay bales or other comparable structures; the use of geocloth, filter fabric, or plastic sheeting for protection of containment structures; rip-rap; and/or any other approved methods. Stormwater Management Plan See Part I.C. of the permit for stormwater requirements. At the time of application, the permittee certified that they had developed and implemented a Stormwater Management Plan (SWMP) for this facility. The permittee shall amend the SWMP whenever there is a change in design, construction, operation, or maintenance which has a significant effect on the potential for the discharge of pollutants to the waters of the State, or if the SWMP proves to be ineffective in achieving the general objectives of controlling pollutants in stormwater discharges associated with mining activity. A copy of the SWMP must be kept on site and provided to the Division upon request. The General Permit for Sand and Gravel Mining and Processing Operations (and other nonmetallic minerals except fuel) is attached. The permittee should review this permit for familiarity with all of the permit requirements. If the permittee has questions related to this certification that cannot be answered by a review of the permit, the permit writer should be contacted. Permit Writ& Erin Scott 303-692-3506 May 27, 2008