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INITIAL RELEASE DDJC Tracy <br /> TABLE 1. Operable Units (continued) <br /> Ope able <br /> Unit No. SiteDescrption Waste Disposal History CotltaminatCdlvledia RemeslialAltemative <br /> OU 2B SWMU 4—Storm Drain Lagoon An unlined lagoon that collected Sediment:Dieldrin No action.The sediment does <br /> stormwater runoff.Received rinse water not pose a threat to <br /> from paint stripping and degreasing groundwater. <br /> operations. <br /> SWMU 8—Burn Pit No.2 A large burn pit where items used or Soil:Total petroleum Bioventing to prevent threat to <br /> stored on-site may have been burned. h drocarbons groundwater. <br /> SWMU IOA—Possible Medical Waste Area reportedly used to bury medical Soil: VOCs,metals, No action. Contaminants in soil <br /> Burial Pit waste and pesticides were not considered to pose a <br /> threat to groundwater. <br /> SWMU 20/23—Aboveground Solvent SWMU 20 used for a 500-gallon Soil: VOCs,SVOCs, No action. Contaminants in soil <br /> Tank/Building 26 Recoup Operations aboveground TCE degreasing unit for and lindane do not pose a threat to <br /> cleaning engine parts. SWMU 23 used as groundwater. <br /> a wash rack. <br /> SWMU 24—Building 247 Petroleum Contains a 500-gallon underground Soil: VOCs,SVOCs, Bioventing to prevent threat to <br /> Laboratory Waste Oil Tank petroleum tank and visibly stained soil. total petroleum groundwater posed by total <br /> hydrocarbons,and petroleum hydrocarbons. • <br /> pesticides <br /> SWMU 27—Building 206 Location of the waste oil sump,which Soil:SVOCs,PCBs, No action.Contaminants in soil <br /> Roundhouse Sump received fluids from the cleaning of pesticides,and metals do not pose a threat to <br /> exterior surfaces of locomotives. groundwater. <br /> Pesticides also were washed down the <br /> drain. <br /> 27 <br />