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E. Furnish adequate equipment to hoist tank from excavation and set on <br />highway carrier. Set tank with vent at the top. Do not drag tanks. <br />3.03 TANK DISPOSAL <br />A. The empty underground tanks and pipes shall be handled as a hazardous <br />waste, and shall be hauled to either a certified waste disposal site <br />or to the Contractor's yard on certified trucks using a hazardous <br />waste manifest. Owner or owner representative will sign manifest. <br />Contractor shall pay all associated costs. Appropriate measures shall <br />be taken to maintain chemical concentrations in the tank vapor to less <br />than 15 percent of the appropriate LEL and oxygen below 10 percent. <br />B. Contractor shall not clean tanks and piping on-site. <br />C. Tanks shall be removed from the site and hauled to the disposal <br />facility within 24 hours of removal from the ground. <br />` D. Submit the following to the Engineer: <br />i 1. Letter certifying that the tanks have been destroyed and properly <br />w disposed (i.e. sold for scrap). <br />2. Copy of the Hazardous Waste Manifest. <br />3.04 SOIL AERATION <br />A. Upon completion of excavation and tank removal, the Engineer will <br />collect soil samples for laboratory analyses from the excavation, and <br />from native segregated soils. On the basis of the results of <br />± laboratory analyses, the Contractor will be directed by the Engineer <br />to either (1) perform additional excavation, (2) begin backfill <br />operations, (3) perform soil aeration, or (4) a combination of (1), <br />(2), and (3). <br />Soil sampling and laboratory analyses will be performed by the <br />_ Engineer on a 48-hour maximum turn -around -time schedule. <br />If laboratory analyses results indicate petroleum hydrocarbons below <br />action levels, in the excavation and in native segregated soil, <br />Contractor may begin backfilling operations with favorably reviewed <br />native material as determined by the Engineer. <br />If laboratory analysis results indicate petroleum hydrocarbons above <br />action levels in the excavation, Contractor will continue excavation <br />as described in Part 3 section 3.01 EXCAVATION. <br />If laboratory analysis results indicate petroleum hydrocarbons above <br />action levels in native segregated soil, contractor will perform soil <br />aeration. <br />Cal -Farm 02071 - 4 882526.01 <br />5 December 1989 <br />WPSPECS2:02071CAL.FRM <br />