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r <br /> Dispenser Soil Sampling-ort Nd <br /> ARCO Facility No.5569 <br /> Stockton,California <br /> Page 2 <br /> All soil samples were relinquished to Sequoia Analytical Inc. (Sequoia), a California <br /> Department of Health Services (CADHS) certified lab, for chemical analysis. Delta and <br /> Sequoia adhered to strict chain-of-custody procedures from the time of sample collection <br /> to the time of sample analysis. Soil samples were analyzed for total petroleum <br /> hydrocarbons as gasoline (TPHG), benzene, toluene, ethylbenzene, and xylenes (BTEX) <br /> by USEPA Method 8015/8020 DHS/LUFT and for 5 oxygenates (methyl tertiary butyl <br /> ether [MTBE], tertiary amyl methyl ether [TAME], di-isopropyl ether [DIPE], ethyl <br /> tertiary butyl ether [ETBE], and tertiary butyl alcohol [TBA]) using USEPA Method <br /> 8260B and for total lead using USEPA Method 6010. Laboratory analytical results are <br /> presented in Table 1. Certified Analytical Reports and chain-of-custody documentation <br /> are included as Attachment A. <br /> Samples were also collected from 2 stockpiles of fill material (primarily pea gravel) <br /> which had been excavated and removed from around the product lines and underground <br /> storage tanks. Two samples were collected from each stockpile, designated by the Delta <br /> field representative as the East stockpile (ESP) and West stockpile (WSP). The samples <br /> from each stockpile were composited by the laboratory into samples ESP (A,B) and WSP <br /> (A,B). The results of these composite samples are presented in Table 1. Certified <br /> Analytical Reports and chain-of-custody documentation are included as Attachment A. <br /> All product lines were flushed with water following removal as required by San Joaquin <br /> County Public Health Services. The flush water was contained in two 55-gallon steel <br /> drums. The drums will be removed by Dillard Environmental, Inc. and transported to a <br /> proper waste disposal facility. <br /> If you have any questions concerning this report, please contact me at(530) 676-6000. <br /> Sincerely, <br /> DE ENVIR NTAL CONSULTANTS, INC. <br /> ay . o on <br /> C ifo Registered Geologist No. 5867 <br /> Project Manager <br /> Attachments Table 1 Soil Analytical Summary <br /> Figure 1 Site Location Map <br /> Figure 2 Site Map <br /> Attachment A Certified Analytical Reports <br /> Chain-of-Custody Documentation <br /> cc: Mr. Paul Supple, Atlantic Richfield Company <br /> \Tront\TRANSFER\arw5569Dispenser Soil Sampling 073100.doc <br />