2017-05-10_REVISION - M2002004 - Laserfiche WebLink

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•Sampling Requirements 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 or prior to discharge to land. Samples must be representative of what is entering the receiving stream. •Stormwater Management Plan—See Part I.C.of the permit for storm water 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. • Best Management Practices The permittee shall implement and maintain the 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 berms 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. •Termination requirements: For termination of permit coverage,the permittee must initiate this by sending the"CDPS Permits and Authorization Termination Form."This form is also available on our web site and must be signed by the legal contact. • Analytical and Sampling Methods for Monitoring: The permittee shall install,calibrate,use and maintain monitoring methods and equipment,including biological and indicated pollutant monitoring methods. All sampling shall be performed by the permittee according to specified methods in 40 C.F.R. Part 136; methods approved by EPA pursuant to 40 C.F.R. Part 136;or methods approved by the Division,in the absence of a method specified in or approved pursuant to 40 C.F.R. Part 136. The analytical method and PQL selected for a parameter shall be the one that can measure at or below the numeric effluent limit.If all specified analytical methods and corresponding PQLs are greater than the numeric effluent limit,then the analytical method with the lowest PQL shall be used. If the permit contains a monitoring or report only requirement, the analytical method with the lowest PQL shall be used. When the analytical method which complies with the above requirements has a PQL greater than the permit limit,and the result of the analyses is non-detect,the permittee shall report"BDL"on the DMR. Such reports will not be considered as violations of the permit limit,as long as the lowest available PQL is used for the analysis. When the analytical method which complies with the above requirements has a PQL that is equal to or less than the permit limitation,"<X"(where X= the actual PQL used)shall be reported on the DMR. For parameters that have only a monitoring or report only limitation, "<X"(where X=the actual PQL used)shall be reported on the DMR. The current lowest PQLs for specific parameters,as determined by the State Laboratory(November 2008)are provided below for reference. If the analytical method cannot achieve a PQL that is less than or equal to the permit limit,then the method,or a more precise method, must achieve a PQL that is less than or equal to the PQL in the table below. For a listing of the PQLs for organic parameters, please refer to the Division's Practical Quantitation Limitation Guidance Document,July 2008. Future requirements for metal PQLs will be contained in the Division's Practical Quantitation Limitation Guidance Document for Metals. Parameter Practical Parameter Practical Quantitation Quantitation Limits,µg/I Limits, Aluminum 50 µg/I Manganese 2 µg/I Ammonia 1 mg/I Mercury 0.1 µg/I Arsenic 1 µg/I Mercury(low-level) 0.003 µg/l Barium 5 µg/I Nickel 50 µg/I Beryllium 1 µg/I N-Ammonia 50 µg/I BOD/CBOD 1 mg/I N Nitrate/Nitrite 0.5 mg/I Boron 50 µg/I N-Nitrate 50 µg/I