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APPENDIX B - STORMWATER MANAGEMENT PLAN (SWMP) 9/97/sg <br />In this document, the text in bold italics is quoted directly from the Sand and Gravel general permit. The text in straight <br />type is provided as guidance in the preparation of your SWMP. <br />The requirement to develop a Stormwater Management Plan (SWMP) prior to application for the general permit applies to <br />all facilities. The applicant shall develop a SWMP for their facility, and certify in Item 8 of the application that it has been <br />completed. The SWMP shall be prepared in accordance with good engineering practices. (The plan need not be <br />completed by a registered engineer.) <br />The plan shall identify potential sources of pollution (including sediment) which may reasonably be expected to affect the <br />quality of stormwater discharges associated with the mining activity. In addition, the plan shall describe and ensure the <br />implementation of Best Management Practices (BMPs) which will be used to reduce the pollutants in stormwater <br />discharges associated with mining activity. BMPs are defined as physical, structural, and/or managerial practices that, <br />when used singly or in combination, prevent or reduce pollution of water. <br />Mining operations must certify the completion of their SWMP, as described in this document. Implementation of the <br />plan will be required at the time that coverage under the general permit begins. The Division reserves the right to request <br />and review the plans, and to require additional measures to prevent and control pollution, as needed. <br />When preparing your plan, make sure to address each item. If it is not applicable to your site, briefly explain why. A <br />simple "Not Applicable" is not enough. Also note that the SWMP should include any existing stormwater controls at your <br />site, not just new or proposed ones. Take full credit for what you are already doing. <br />The SWMP shall include the following items, at a minimum: <br />1. Site Map <br />The plan shall provide a site map or maps which indicate at a minimum: <br />- Mining site boundaries <br />- Access and haul roads <br />- Stormwater outfalls and an outline of the drainage area of each stormwater outfall <br />An estimate of the direction of flow <br />- Materials handling areas <br />- Each existing structural control measure to reduce pollutants in stormwater runoff <br />- Areas used for storage or disposal of overburden, materials, soils or wastes <br />- Areas used for mineral milling and processing <br />- Springs, streams, wetlands and other surface waters <br />- Location of mine drainage or any other process water <br />Boundary of tributary area that is subject to effluent limitations <br />Date the map was prepared <br />The drainage areas shown should include the portions of the site where industrial activities occur, as well as those portions <br />contributing stormwater that mixes with runoff from the industrial area. Therefore, the entire drainage area where industrial <br />activities occur must usually be included. <br />Aside from mining, industrial activities can include equipment washing, materials storage, vehicle maintenance or fueling, <br />incineration, waste treatment, storage or disposal, shipping/loading/unloading, etc. You do not need to include industrial <br />activities which only take place indoors, unless there is some part or aspect of the activity with which stormwater could <br />come in contact. For example, if all vehicle maintenance is done indoors, but vehicle storage or fueling is outside, the <br />vehicle storage or fueling area must be addressed. <br />B1