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=a <br /> c_. <br /> L <br /> 1. H. KLEINFELDER &ASSOCIATES <br /> (1) Landfarming <br /> o The contaminated soil could be removed, stockpiled and covered. <br /> A given volume of soil could be removed periodically from the <br /> stockpile and aerated in a designated area to volatilize the <br /> hydrocarbons from the soil. The volume of soil treated per cycle <br /> would be dependent on the mass emission limit set by the local <br /> air pollution control district. The alternative would have a low <br /> capital cost, a moderate operation cost, long time frame and <br /> would require a designated area for conducting the operation. <br /> o The contaminated soil could be placed in a covered controlled <br /> structure (i.e., fiberglass tomato transport bins), nutrients and ' <br /> oxygen enriched water would be applied to the soil and the water <br /> v_ recycled through a series of underdrains and the cycle repeated <br /> to promote and control biological breakdown of the hydrocarbons. <br /> Forced air ventilation with carbon filters would be required to <br /> control the build-up of explosive gas concentration and to meet <br /> air pollution control district requirements. The system would <br /> have the advantage of accelerating the treatment process but <br /> would have higher operational and capital costs and require a <br /> higher Leval of technical personnel to operate and monitor the <br /> system. . <br /> o Landfarming by disking the soil into the top 6 inches of soil <br /> over a designated area. Application of sufficient moisture and <br /> nutrients would greacly accelerate reduction of. the <br /> �# hydrocarbons. Volatilization would be the prime reduction <br /> process in the upper, shallow zone and biological breakdown in <br /> the deeper zone. The system would require vadose zone monitoring <br /> as well as a permit from the air pollution control district and <br /> Possibly DOHS. <br /> 38-87-43 <br /> 16 <br />