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Stormwater Pollution Prevention Plan <br /> • Contaminated surfaces shall be cleaned immediately following any <br /> discharge or spill incident. <br /> Demolition: <br /> • Dust released from demolished sidewalks, buildings, or structures will be <br /> controlled using Dust Control measures (BMP C140). <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 C152). <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 /> 3.1.10 Element #10 — Control Dewatering <br /> All dewatering water from open cut excavation, tunneling, foundation work, trench, or <br /> underground vaults shall be discharged into a controlled conveyance system prior to discharge <br /> to the downstream drainage course. Channels will be stabilized, per Element#8. Clean, non- <br /> turbid dewatering water will not be routed through stormwater sediment ponds, and will be <br /> discharged to systems tributary to the receiving waters of the State in a manner that does not <br /> cause erosion, flooding, or a violation of State water quality standards in the receiving water. <br /> Highly turbid dewatering water from soils known or suspected to be contaminated, or from use <br /> of construction equipment, will require additional monitoring and treatment as required for the <br /> specific pollutants based on the receiving waters into which the discharge is occurring. Such <br /> monitoring is the responsibility of the contractor. <br /> However, the dewatering of soils known to be free of contamination will trigger BMPs to trap <br /> sediment and reduce turbidity. At a minimum, geotextile fabric socks/bags/cells will be used to <br /> filter this material. Other BMPs to be used for sediment trapping and turbidity reduction include <br /> the following: <br /> • Concrete Handling (BMP C151) <br /> Concrete shall be handled pursuant to BMP C151 wherever and whenever concrete is mixed <br /> and poured at the project site. <br /> Alternate dewatering control BMPs are included in Appendix C as a quick reference tool for the <br /> onsite inspector in the event the BMP(s) listed above are deemed ineffective or inappropriate <br /> 10 17576.003.doc <br />