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1 <br /> steel tubes and prepared for transport to the laboratory in the same manner utilized when <br /> sampling the bottom of the former tank cavity. <br /> The stockpile samples were delivered to Sequoia for chemical analyses. Chain-of-Custody <br /> documentation was maintained for all samples. Sequoia combined each set of four stockpile <br /> ' samples into one composite sample for analysis. A total of 16 composite samples were analyzed <br /> for TPH-G, BTEX and STLC lead. <br /> ' Table 2 summarizes the laboratoryanalytical data for the stockpile samples. Laboratory <br /> Y kP P <br />' analytical reports and Chain-of-Custody documentation forms are presented in Appendix B. <br /> I <br /> 52 Aeration and Disposal of Stockpiled Soil <br /> Disposal options for each soil stockpile were evaluated by Roux and ARCO following receipt <br /> of laboratory analytical data The laboratory analytical data for the soil stockpiles was provided <br /> to the Browning Ferris Industries Class III landfill in Livermore, California (BFI). Following <br />' approval by BFI, soil stockpiles CS 12 through CS 16 were removed from the Site beginning on <br /> September 10, 1993, by Dillard Trucking of Byron, California (Dillard) and transported to the <br /> BFI Class III landfill <br />' The remaining soil stockpiles were not initially accepted for disposal by BFI To reduce the <br /> concentration of petroleum hydrocarbons, these soil stockpiles were aerated at the Site following <br /> procedures outlined by the San Joaquin Valley Unified Air Pollution Control District (APCD) <br /> Aeration of the soil began on September 14, 1993, and was accomplished by spreading the soil <br /> out in a thin layer and repeatedly turning the soil over to promote volatilization of hydrocarbons <br /> After one to two days of aeration the soil stockpiles were re-sampled. A composite sample was <br /> collected from each 100 cu. yds. of aerated soil and analyzed in the same manner as the pre- <br /> aeration soil stockpiles A total of six composite samples were collected. The laboratory <br /> analytical data for the aerated stockpile samples is included on Table 2 Laboratory analytical <br /> reports and Chain-of-Custody documentation forms are presented in Appendix B. <br />' FSC p�p�,,r ® 6 Doc #A15swol 17 <br />