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I <br /> �1r�acA Placer Tractor Service <br /> 7200 Wells Avenue <br /> _j Loomis, California 95650 r- <br /> (916) 652-5535 <br /> alt. <br /> EPA#CAD 982040206 DOH Hauler#2350 <br /> A-General Engineering C-2 Insulation <br /> Contractors License#440591 B-1 General Building C-10 Electrical PLC#152608 <br /> PROCEDURES FOR UNDERGROUND TANK REMOVAL <br /> A. REMOVE ALL RESIDUAL COMBUSTIBLE/FLAMMABLE LIQUIDS FROM THE LINES AND TANKS. <br /> Placer Tractor Service will be responsible for removing residual liquid in <br /> the tank with it's vacuum truck. All residual liquids removed are considered <br /> hazardous waste and will be manifested to a TSDF facility. <br /> B. INITIAL EXCAVATION <br /> 1. Placer Tractor shall remove asphalt -and/or concrete cover as necessary <br /> to expose storage tank and piping. Asphalt and/or concrete will be cut <br /> at right angles (90 degrees) to allow appropriate site restoration. <br /> Placer Tractor is responsible for disposal of all removed concrete <br /> I' or asphalt. <br /> 2. Placer Tractor shall remove sufficient backfill .to expose the tank top <br /> and piping. The site inspector will investigate the excavated area <br /> for evidence of contamination. <br /> C. DISCONNECT AND RINSE PIPING <br /> All piping shall be disconnected at a point furthest away from the tanks. <br /> D. INERT TANKS <br /> 1. Flammable vapors will be expelled by inserting a minimum of 1.5 pounds <br /> of solid carbon dioxide (dry ice) per 100 gallons of tank volume. <br /> 2. All piping shall be disconnected from the tanks and all tank openings <br /> securely sealed. One 1/8 inch vent hole will be left open at the high <br /> point of the tank to allow flammable vapors to escape. <br /> 3. A minimum of two hours must be allowed for the vapors to expel once <br /> the dry ice has been introduced into the tank and the tank properly <br /> sealed. <br /> l - <br /> Page 1 of 5 <br />