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KLEINFELDER <br />' 3 SOIL )=Cff <br /> 1 <br /> 3.1 TRANSPDF=CN OF EXCAVATM SOIL <br /> In October 1987 approximately 450 cubic yawls of meted soil (25 <br /> 1� Y <br />' truckloads) were removed from the AT&T Micro ave site in Iodi, California, <br /> and transported approximately 40 miles to Forward Landfill zn San Joaquin <br /> County (Plate 1) . Each truckload hauled approximately 18 cubic yards of <br /> soil. Each load was secured with a tarp and do=nanted by the Sacramento <br /> Equipment Maintexkance site manager. <br /> 3.2 AERATION OF SOIL <br /> Aeration of the soil was conducted from October 21, 1987 to March 30, <br /> 1988, in accordance with RWQM and APCD guidelines. An average TPH <br /> concentration of 372 mg/]�g was calculated for the contaminated soil. This <br /> average TPH concentration fell into the APCD organic content category of <br /> 1 1.00 to 500 mg/kg, allowing a 120 cubic yard per date rate of controlled <br /> aeration (Appendix B, APCD Guidelines) . The contaminated soil was aerated <br /> rin four separate 120 cubic yard sections until the TPH concentrations were <br /> below the PWQCB specified level of 300 mg/kg. <br /> The aeration of the fourth soil pile was delayed and ccmpleted after the <br /> 187/188 winter months. <br /> 1_ <br />' Each pile to be aerated was ur=vered and spread out into a continuous 6- <br /> to 12-inch-thick layer. The soil was tilled at least twice a day for <br /> approximately two weeks. Once the TPH corK=tration was below the <br />[y required 300 mg/Jq level, the soil was prepared for landfill disposal <br /> pending confirmatory laboratory results and soil screening. <br /> I* <br />�j 104-88-681 3 <br /> I� <br />