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Stormwater Pollution Prevention P/an <br />Spill prevention measures, such as drip pans, will be used when conducting maintenance <br />and repair of vehicles or equipment. <br />In order to perfoim emergency repairs on site, temporary plastic will be placed beneath <br />and, if raining, over the vehicle. <br />Contaminated surfaces shall be cleaned immediately following any discharge or spill <br />incident. <br />Demolition: <br />� Dust released from demolished sidewalks, buildings, or structures will be <br />controlled using Dust Control measures (BMP C 140). <br />• Storm drain inlets vulnerable to stormwater discharge carrying dust, soil, <br />or debris will be protected using Storm Drain Inlet Protection (BMP C220 <br />as described above for Element 7). <br />• Process water and slurry resulting from sawcutting and surfacing <br />operations will be prevented from entering the waters of the State by <br />implementing Sawcutting and Surfacing Pollution Prevention measures <br />(BMP C 152). <br />Concrete and grout: <br />• Process water and slurry resulting from concrete work will be prevented <br />from entering the waters of the State by implementing Concrete Handling <br />measures (BMP C151). <br />The facility does not require a Spill Prevention, Control, and Countermeasure (SPCC) Plan under <br />the Federal regulations of the Clean Water Act (CWA). <br />3.1.10 Element #10 — Control Dewatering <br />Dewatering of construction stormwater is anticipated as part of this construction project. All <br />sediment laden construction stormwater and dewatering water from open cut excavation, <br />foundation work, trenching, or underground vaults will be directed into a controlled conveyance <br />system consisting of an interceptor ditch (BMP C200) and check dams (BMP C207) placed <br />around the bottom of the excavation and then into a sump consisting of a 55-gallon drum <br />surrounded by pea gravel and filter fabric (per Sheet C2.1 of the TESCP in Appendix A). Water <br />from the sump/55-gallon drum will be pumped into a settling tank (per Sheet C2.1 of the TESCP <br />in Appendix A) prior to being discharged in accordance with the NPDES permit. The discharge <br />water from the settling tank and any clean, non-turbid construction dewatering water and <br />stormwater will be discharged to the sanitary sewer to the north of the site. <br />f�7 <br />