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Element 3: Control Flow Rates (2.1.3) <br />Runoff from the project site is discharged through an existing conveyance system to a flow <br />control exempt waterbody. The site is already highly developed and flow rates are not <br />anticipated to increase due to this project. <br />For the period of construction where the surcharge fill material is placed, Interceptor Ditches <br />(BMP C200) with Check Dams (BMP C207 or C208, COE Standard Drawing No. 207) will be <br />used to collect runoff from the surcharge fill pile and will discharge to the COE sewer system if <br />needed. All construction stormwater runoff that does not infiltrate will be discharged to the COE <br />sewer system. <br />Baker Tanks will be utilized to remove sediment from construction stormwater runoff prior to <br />discharge. Additional BMP's shall be implemented as required to meet COE effluent limitations <br />for discharge. <br />See the TESC plans in Appendix A for locations of these BMPs. <br />Will you construct stormwater retention and/or detention facilities? <br />No <br />Will you use permanent infiltration ponds or other low impact development (example: rain <br />gardens, bio-retention, porous pavement) to control flow during construction? <br />No <br />List and describe BMPs: BMP C200 — Interceptor Ditch <br />BMP C207 or C208 - Check Dams <br />BMP C233 — Silt Fence <br />Installation Schedules: C233 shall be installed prior to any land -disturbing <br />activities. <br />BMP C200, C207, and C208 shall be installed immediately <br />following surcharge fill placement. Baker Tanks will be <br />installed to treat stormwater runoff and meter the discharge <br />to the COE sewer system. <br />Inspection and Maintenance plan: Inspection and Maintenance shall be performed per BMP <br />guidelines and/or manufacturer recommendations. <br />Responsible Staff: CESCL (TBD by Contractor) <br />