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CLOSURE PLAN INFORMATION <br /> At a minimum, unless otherwise directed by the San Joaquin Local <br /> Health District, the following procedures will be followed during <br /> the removal of the existing underground storage tanks and ancillary <br /> piping at ARCO Facility No. 6100, located at 25775 Patterson Pass <br /> Road, Tracy, California. <br /> 1. Product and vapor lines will be drained into the <br /> tank and disconnected from the tank in a manner <br /> allowing tank openings to be sealed. <br /> 2 . All tanks will be rendered inert using dry ice at <br /> a rate of 15 pounds per 1, 000 gallons of tank <br /> capacity 16 hours prior to removal. The tank <br /> removal will not proceed until the atmosphere of the <br /> tank shows 0. 14 LEL. <br /> 3 . The tanks will be triple-rinsed prior to removal <br /> off-site. The rinsate will be transported and <br /> manifested as hazardous waste, if required, and the <br /> tanks will be transported to an appropriate disposal <br /> facility. <br /> 4 . Two (2) soil samples will be taken from each tank <br /> location, one sample from beneath each end of the <br /> tank at the native soil/backfill interface, and one <br /> sample will be taken from beneath every 20 feet of <br /> piping. <br /> 5. Information on the tank and piping, rinsate, and <br /> soil transporters and methods of disposal will be <br /> provided to you once we have a contractor selected <br /> for this job. <br /> 6. The disposition of the soil removed from this site <br /> will depend upon the degree of contamination, if <br /> any, of the soil. <br /> MAY 11 1990 <br /> FNVIRONMENTAL HEALTF <br /> PERMIT/SERVICES <br />