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• • <br /> UNDERGROUND STORAGE TANK CLOSURE PLAN <br /> r <br /> FOR t <br /> PACIFIC GAS AND ELECTRIC COMPANY' S r_ <br /> MANTECA SERVICE CENTER �-P, tj <br /> 1 . Location : Manteca Service Center, 10901 East Highway 120 , <br /> Manteca , California. <br /> Contact : Mike Harbick Phone * (209) 443-5563 <br /> 2 . Physical Description : 1 , 000 gallon, single walled steel tank <br /> with associated piping. <br /> 3 . Contents : Unleaded Gasoline <br /> 4 . Contractor: Precision Industries <br /> 5 . Soil Sampling: The soil sampling and testing will be per- <br /> formed by the Twining Laboratories , Inc . <br /> 6. Notification : The San Joaquin County Health Department will <br /> be 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 /> Flammable vapors will be purged by introducing 1 . 5 pounds of <br /> dry ice into the 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 tank will be <br /> manifested on-site and transported by a licensed hazardous <br /> waste hauler to the Erickson Inc. class l disposal facility <br /> in Richmond Ca. <br /> Any obviously contaminated soils will be excavated and <br /> stockpiled for off-site disposal . A soil sample will then be <br /> taken from the bottom of the excavation and laboratory tested <br /> for Total Hydrocarbons . At least one sample will be taken <br /> for every 200 square feet of tank excavation and for every 20 <br /> lineal feet of piping excavation . <br />