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Pi <br />11 <br />• Total purgeable petroleum hydrocarbons (TPH-G) by U.S. Environmental <br />Protection Agency (USEPA) Method 5030/8015, and <br />• Benzene, toluene, ethylbenzene, and xylenes (BTEX) by USEPA Method <br />8020. <br />5.5 Soil Stockpiling and Sampling <br />The peaa gravel, sand fill material, native soil excavated from the UST cavity, and from <br />the piping trenches will be stockpiled on-site. A Roux geologist will examine the <br />excavated soil visually and with a photoionization detector (PID) to assist in segregating <br />the soil stockpiles. Composite samples will be collected from the stockpiles to <br />characterize the soil for disposal. <br />Roux will collect four soil samples from each 100 cu. yds. of stockpiled soil. To <br />prepare the soil for sampling, six to twelve inches of soil will be scraped away from the <br />surface of the stockpile. Samples will be collected from the prepared surface. Stockpile <br />samples will be collected in stainless steel tubes and prepared for transport to the <br />laboratory in the same manner utilized when sampling the product line trenches. <br />The stockpile samples will be delivered to Sequoia for chemical analyses. Chain -of - <br />Custody documentation will be maintained for all samples. Sequoia will combine each <br />set of four stockpile samples into one composite sample for analysis. The composite <br />samples will be analyzed for TPH-G by USEPA Method 5030/8015 and BTEX by <br />USEPA Method 8020. <br />• _- r r � rr r r r -r • <br />Disposal options for the stockpiled soil will be evaluated following receipt of the <br />laboratory analytical data. Results of the analyses will be submitted to the PHS-EHD. <br />Soil which is acceptable for disposal in a Class III landfill will be hauled to Browning- <br />Ferris Industries (BFI) facility in Livermore, California. If any of the soil contains levels <br />6 Doc #A159W01.1.5 <br />