9701 EVERGREEN WAY 2025-07-28 - Laserfiche WebLink

4-2.1.8 BMP C1.80 TREATMENT AND DISPOSAL OF CONTAMINATED SOILS Contaminated ground water or soil may be encountered during earthwork activities or by the spill or leak of a hazardous product. The contaminant may be known or unknown. Sampling and laboratory tests may be required to determine whether a landfill can accept the contaminated soil. The Model Toxics Control Act, Ch. 70.105 RCW,requires that Ecology's Toxic Cleanup Program be notified if contaminated soil or ground water is encountered during a project. 4-2.1.9 BMP C 1.90 CONCRETE TRUCKS/SPRAY WASHING OF EXPOSED AGGREGATE DRIVEWAYS AND WALKWAYS The following are acceptable areas for disposal of the washout from a concrete truck: - A designated area which will later be backfilled(i.e., a slurry pit). - An area where the concrete wash can harden,be broken up, and then put in a dumpster. - A location which is not subject to surface water runoff,and more than 50 feet away from a storm drain, open ditch,or receiving water. Washout from concrete trucks may never be dumped: - Into a sanitary sewer - Into a storm drain - Onto soil or pavement which conveys stormwater runoff away from the area. When spray washing driveways or walkways to expose the aggregate,all wash water should be diverted or sprayed to the sides of the driveway,not down the driveway. If water must run down the driveway towards the street or sidewalk, it should be diverted at the bottom to a sump or sediment trap. 4- E OF SANDBLASTING GRITS Sandblasting grits are a hazar clean old buildings where lead,cadmium,or chrome-based paints were applied. They cannot be washe r system. A licensed waste management firm or treatment,storage and disposal facility should be con • 1 of these materials. • 4-2.1.11 BMP C2.10 DISPOSAL OF ASBESTOS AND PCBS Use and disposal of these potential pollutants are regulated by both state and federal agencies. • For further information regarding asbestos, call the Puget Sound Air Pollution Control Agency at 296-7330 or the U.S.EPA at 442-7369. For Wastes Containing PCBs,call the Department of Ecology,Hazardous Waste Section at 449-6687 or the U.S. EPA at 442-7369 4-2.2 LAND USE SOURCE CONTROL BMPS 4-2.2.1 BMP S1.10 FUELING SITES In addition to general service gas occur at 24-hour convenience stores, construction firms,warehouses,car washes,and businesses with fleet ve ccurs at port facilities and 4-2-5