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STORMWATER SITE PLAN NOVEMBER 7, 2019 <br />COMPASS HEALTH SUPPORTIVE HOUSING PAGE 6 <br />BMP C153 for material delivery, storage and containment in the Surface Water <br />Management Manual for Western Washington, 2012/14. <br />• Application of agricultural chemicals, including fertilizers and pesticides, shall be <br />conducted in a manner and at application rates that will not result in loss of chemical to <br />stormwater runoff. Manufacturers' recommendations for application procedures and <br />rates shall be followed. <br />Demolition: <br />• Dust released from demolished sidewalks shall be controlled using dust control <br />measures (BMP C140). <br />• Storm drain inlets vulnerable to stormwater discharge carrying dust, soil, or <br />debris will be protected using storm drain inlet protection (BMP C220 as indicated on <br />the plan). <br />• Process water and slurry resulting from sawcutting and surfacing operations will <br />be prevented from entering the waters of the state by implementing sawcutting and <br />surfacing pollution prevention measures (BMP C152). <br />1. Slurry and cutting shall be vacuumed during cutting and surfacing <br />operations. <br />2. Slurry and cuttings shall not drain to any natural or constructed drainage <br />conveyance. <br />3. Collected slurry and cuttings shall be disposed of in a manner that does <br />not violate groundwater or surface water quality standards. <br />Concrete and grout: <br />• Process water and slurry resulting from concrete work will be prevented from <br />entering the waters of the state by implementing concrete handling measures (BMP <br />C151). <br />1. Concrete truck chutes, pumps, and internals shall be washed out only <br />into formed areas awaiting installation of concrete or asphalt. <br />2. Unused concrete remaining in the truck and pump shall be returned to <br />the originating batch plant for recycling. <br />3. Hand tools including, but not limited to, screeds, shovels, rakes, floats, <br />and trowels shall be washed off only into formed areas awaiting installation of <br />concrete or asphalt. <br />When no formed areas are available, washwater and leftover product shall be <br />contained in a lined container. Contained concrete shall be disposed of in a manner that <br />does not violate groundwater or surface water quality standards. <br />Sanitary wastewater: <br />• Portable sanitation facilities will be firmly secured, regularly maintained, and <br />emptied when necessary. <br />• Solid waste will be stored in secure, clearly marked containers. <br />P:\Work\Projects\2017\17-125 Environmental Works\CE\DOCS\Final SSP 17-125.doc <br />