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4-2.].8 BMP C1.80 TREATMENT A�D UISPOSAL OF COnTAAfINATED SOILS <br /> Contaminated ground µater or soi! may be encountered Juring earthwork acti�ities or by the spill or leak of a <br /> haurdous product. The contaminant may be knowm or unknown. Sampling a�id laboratory tests may be req�ired <br /> to detertnineµ�hcihcr a landfill can accept thc contaminated soil. <br /> Thc Model Toxics Control Act, Ch. 70.105 RCW,requires that Ecolog}'s Toxic Clcanup Program be notified if <br /> contaminated soil or ground water is encountered during a project. <br /> 4-2.1.9 BA'IP C 1.90 CONCRETE TRUCKS/SPRAY WASHING OF EXPOSED AGGREGATE <br /> DRIVEWAYS AND WALKWAYS <br /> The following are acceptable arcas for dispe�sa� of the washout from a roncrete truck: <br /> - A designated arca which will later be backfilled(i.e.,a slurry pit). <br /> - An arca where the concrete was!i can hardcn,be brokcn up, and then put in a dumpster. <br /> - A location whieh is not subjeet to surface Hatcr runoff;and morc than 5(1 feet a�aay from a storm drain, <br /> open ditch,c:receiving water. <br /> Washout from^oncrcte trucks map ncven c�dumped: <br /> - into a sanitary sc�vcr <br /> - Into a storm drain <br /> - Onto soil or pa��ement which convcys stormH�ater runoff away from the arca. <br /> � When spray washing drivewaVs or wal��vays to expose the aggregate, all wash water should be diverted or <br /> sprayed to the sides of the driveway, not dowm thc dnveway. If water must run dow�n thc dri��eway towards the <br /> _, strcet or sidewalk, it snould be divened at tt�e bottom to a sump or sediment trap. <br /> 4-2. . E OF SANDBLASTING GRiTS <br /> Sandblasting grits are a hazar � clean old buildirgs where Iead,cadmium, or chrome•based <br /> painu were applied. They cannot bc washe svstcm. A liccnsed waste rt�anagemcnt firtn or <br /> trcatmcnt, storage and disposal facility should be con , sl of these materials. <br /> 42.1.11 BMP C2.10 DiSPOSAL OF ASBESTOS AND PCF35 <br /> Use end disposal of these potential pollutants are regulated by both state and federal agencies. <br /> For further information regarding asbestos,call the Puget Sound Air Pollution Convol Agency at 296-7330 or the <br /> U.S.EPA at 442-7369. <br /> For Wastes Containing PCBs, call the Department of Ecolo�,v, Hazardous�1%aste Section at 449•6687 or the U.S. <br /> EPA at 442-7369 <br /> 42.2 LAND L1SE SOURCE CONTROL BMi'S <br /> 4-2.2.1 BMP S1.10 FUELING SITES <br /> � ln addition to general service gas , occur at 24-hour convenience stores, construction <br /> firms,w•arehouses, car�vazhes,and businesses ti�ith fleet��e �c . li�.oli�pccurs at port facili:ies an� <br /> 4-2-5 <br />