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• stormwater management plan" dated April 27, 2001. The only item attached to the letter was a map of the facility with certain areas highlighted. EPA assumes that the remainder of the plan provided to EPA in May 2000 is still in effect and only the drawing has changed. EPA finds that several requirements outlined in Part I C.2 of CDPS permit COG-500000 were not represented in the attached drawing or covered in the previously submitted plan. The following outlines the requirements of a SWMP, as outlined in Part I C.2 of CDPS permit COG-500000, followed by deficiencies with RMMA's SWMP in bold. Requirements of a Storm Water Management Plan The plan must identify potential sources of pollution (including sediment) which may reasonably be expected to affect the quality of stormwater discharges associated with the mining activity. SWMP should be updated to indicate that sediment is a potential source of pollution from the quarry. 2. The plan must describe and ensure the implementation of best management practices (BMPs) which will be used to reduce the pollutants in stormwater discharges associated with mining activity. stormwater that comes into contact with the active mining area becomes process water. Is stormwater diverted around the mining area and plant areas? How and where is this "clean" stormwater discharged? The current plan seems to indicate that all stormwater entering the quarry property is collected in sediment basins. This would imply that all of the basins would contain process water. This needs to be clarified in the plan. The plan must include a site map which indicates, at a minimum: • Mining site boundaries • Access and haul roads • stormwater outfalls and an outline of the drainage area of each stormwater outfall Not included in the updated site map • An estimate of the direction of flow Not included in the updated site map • Materials handling areas • Each existing structural control measure to reduce pollutants in stormwater runoff • Areas used for storage or disposal of overburden, materials, soils or wastes Growth materials stock piles are identified, but overburden, material and wastes are not identified • Area used for mineral milling and processing • Springs, streams, wetlands and other surface waters No surface water identified on updated site map • Location of mine drainage or any other process water Not included in the updated site map • Boundary of tributary azea that is subject to eRluent limitations • Date map was prepared