220 OLYMPIC BLVD VA OUTPATIENT CLINIC 2023-02-09

1 S454 BMPs for Preventive Maintenance / Good IHousekeeping Preventative maintenance and good housekeeping practices reduce the potential for stormwater to Icome into contact with pollutants and can reduce maintenance intervals for the drainage system and sewer system. I Applicable BMPs: . Prevent the discharge of unpermitted liquid or solid wastes,process wastewater,and sewage to ground or surface water,or to storm drains that discharge to surface water,or to the ground. Conduct all oily parts cleaning,steam cleaning,or pressure washing of equipment or containers inside a building,or on an impervious contained area,such as a concrete pad. Dir- I ect contaminated stormwater from such an area to a sanitary sewer where allowed by local sewer authority,or to other approved treatment. . Promptly contain and clean up solid and liquid pollutant leaks and spills induding oils,solvents, fuels, and dust from manufacturing operations on an exposed soil,vegetation,or paved area. . If a contaminated surface must be pressure washed, collect the resulting washwater for I proper disposal(usually involves plugging storm drains,or otherwise preventing discharge and pumping or vactoring up washwater,for discharge to sanitary sewer or for vactor truck transport to a waste water treatment plant for disposal). I . Do not hose down pollutants from any area to the ground,storm drains, conveyance ditches, or receiving water.Convey pollutants before discharge to a treatment system approved by the Ilocal jurisdiction. • Sweep all appropriate surfaces with vacuum sweepers quarterly,or more frequently as I needed,for the collection and disposal of dust and debris that could contaminate stormwater. Use mechanical sweepers,and manual sweeping as necessary to access areas that a vacuum sweeper can't reach to ensure that all surface contaminants are routinely removed. . Do not pave over contaminated soil unless it has been determined that ground water has not been and will not be contaminated by the soil. Call Ecology for assistance. . Construct impervious areas that are compatible with the materials handled. Portland cement concrete,asphalt,or equivalent material may be considered. • Use drip pans to collect leaks and spills from industrial/commercial equipment such as cranes Iat ship/boat building and repair facilities, log stackers, industrial parts,trucks and other vehicles stored outside. . At industrial and commercial facilities,drain oil and fuel filters before disposal. Discard empty oil and fuel filters,oily rags,and other oily solid waste into appropriately closed and properly labeled containers,and in compliance with the Uniform Fire Code or International Building Code. . For the storage of liquids use containers, such as steel and plastic drums,that are rigid and I I 2019 Stormwater Management Manual for Western Washington Volume IV-Chapter 1 -Page 499