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oz <br /> UNDERGROUND STORAGE TANK CLOSURE PLAN <br /> FOR ENVFERM�BSER GESTH <br /> PACIFIC GAS AND ELECTRIC COMPANY ' S <br /> TRACY SERVICE CENTER <br /> 1 . Location : Tracy Service Center , 502 East Grantline Road , <br /> Tracy, California. <br /> 2 . Physical Description : One 2 , 000 gallon , single wall steel <br /> tank, with associated piping . 4 <br /> 3. Contents : None . Previously contained unleaded gasoline . <br /> 4. Contractor : <br /> 5. Soil Sampling : The soil sampling and testing will be <br /> performed by The Twining Laboratories , Inc . <br /> 6 . Notification : The San Joaquin Local Health District will be <br /> notified at least 48 hours prior to tank removal and soil <br /> sampling. <br /> 7 . Procedures : Before excavation begins , any residual sludge or <br /> free liquid will be removed from the tank . Clean excavated <br /> material will be stockpiled on-site for use in backfilling <br /> the excavation. The tank and piping will then be uncovered <br /> with a backhoe . The piping will be removed and stockpiled <br /> for off-site disposal . <br /> The Tank will be decontaminated by triple rinsing . All <br /> rinsate , remaining oil , product , sludge , etc . , will be hauled <br /> to a Class I Disposal Facility by a licensed hazardous waste <br /> hauler or recycled in accordance with PG &E and The San <br /> Joaquin Local Health District . <br /> Flammable vapors will be purged by introducing 1 . 5 pounds of <br /> dry ice into tank per 100 gallons of tank capacity and <br /> sealing all openings , except the vent port , at least one hour <br /> before tank removal . Following removal , the decontaminated <br /> tank will be cut up into several pieces and disposed of as <br /> scrap . <br /> Any obviously contaminated soil will be excavated and <br /> stockpiled for off-site disposal . Soil samples will then be <br />