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Dispenser Soil Sampling Repo <br />ARCO Facility No. 2130 <br />Stockton, California <br />Delta Project No. L099-705 <br />Page 2 <br />All soil samples were relinquished to Sequoia Analytical of Sacramento, California (Sequoia). Sequoia <br />is an ARCO -contracted and California Department of Health Services (CADHS)-certified laboratory. <br />Delta and Sequoia adhered to strict chain -of -custody procedures from sample collection to sample <br />analysis. Soil samples were analyzed for total purgeable hydrocarbons (C6 -C12) according to <br />CADHS Environmental Protection Agency (EPA) Method 8015M and for benzene, toluene, <br />ethylbenzene, and total xylenes according to CADHS EPA Method 8020M. Soil samples were also <br />analyzed for methyl tertiary butyl ether, tert-butyl alcohol, di -isopropyl ether, ethyl tert-butyl ether, and <br />tert-amyl methyl ether according to EPA Method 8260A. Analytical results are presented in Table 1. <br />Laboratory reports and chain -of -custody documentation are included as Attachment A. <br />If you have any questions concerning this letter report, please contact Bryan Van Wagner at (949) 466- <br />9215. <br />Sincerely, <br />DELTA ENVIRONMENTAL CONSULTANTS, INC. <br />California- . Geologist No. t <br />Attachments: Figure 1 Site Map with Sample Locations <br />Table 1 Soil Sample Analytical Results <br />Attachment A Laboratory Reports and Chain -of -Custody Documentation <br />cc: Mr. Kyle Christie, ARCO Products Company, La Palma, California <br />Mr. Vince Corsello, ARCO Products Company, La Palma, California <br />Mr. Paul Supple, ARCO Products Company, Moraga, California <br />Mr. Benjamin Heningburg, Delta Environmental Consultants, Sacramento, California <br />BV W:njm(h:\users\projects.99\99-705\2130dssr.doc) <br />