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Most stormwater runoff wi~ow across the site toward the excavatedpit that will act as a <br />settling basin. The excavation will retain runoff from small storm events on-site. <br />Some channelization may need to be added during future mining phases in order to continue <br />collecting runoff in the excavation. Any stormwater conveyance improvements will be described <br />in future annual SWMP reports if they are constructed. <br />Problems associated with sediment transport through the floodplain aze expected to be minor. <br />Flood elevations in this area are not expected to be impacted by this operation. The excavation <br />of a pit will reduce the floodplain width as well as the flow velocities. It will act as a sediment <br />trap and reduce the amount of sediment potentially leaving the site. <br />Equipment used for the extraction and hauling of the aggregate will be stored on-site, near the <br />office. Daily equipment monitoring will occur on-site. Maintenance and repair activities will be <br />performed off site. Occasionally, a mobile service truck may be brought on site to perform oil <br />changes. <br />3.0 Potential Pollutant SourceslMaterial Inventory <br />Potential pollutants expected to be stored on-site would include but not be limited to, diesel fuel, <br />and small amounts of miscellaneous equipment fluids and oils. There will be one diesel fuel tank <br />with the capacity for 10,000 gallons of fuel. <br />One pazking area for both employee vehicles and the mining equipment will be located near the <br />office trailer. This azea will be gravel. <br />Haul routes within the site will be gravel or dirt, depending on their location, and can be <br />expected to be a source of potential pollution to stormwater runoff Access roads into the site <br />will be gravel. <br />When the asphalt batch plant is brought on site the components will consist of approximately <br />10,000 gallons of emulsified asphalt, approximately 25,000 gallons of ac cement and <br />approximately 10,000 gallons of burner fuel to operate the plant. Waste asphalt will also be used <br />(recycled) at this plant. Waste oils from the mining equipment at the site will be recycled and <br />used in the production of asphalt. <br />No spills of significant quantities of any substance are known to exist at this site. <br />4.0 Best Managewent Practices LBMPs)_for Stormwater Pollution Prevention <br />4.1 SWMP Administrator <br />Dave Simpson, Vice President of Connell Resources, will be the S WMP Administrator. The <br />Administrator will be responsible for handling the day to day management of the S WMP at the <br />site. The SWMP Administrator may appoint other personnel to assist him as needed. A SWMP <br />team may be created to shaze the responsibility and generate greater awareness and participation. <br />Any and all changes to the SWMP will be noted directly on the report or the maps for <br />incorporation into the plan. <br />