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T i 15 x , PACIFIC ENVIRONMENTAL • GROUP INC January 10, 1996 Project 320-135 1A Mr Brett Hunter Chevron U S A Products Company P O Box 5004 San Ramon, Califoi rua 94583-0804 Re Soil Investigation r Chevron U S A Service Station 9-6171 6633 Pacific Avenue at Benjamin Holt Drive f Stockton, California Dear Mr Hunter This letter report, prepared by Pacific Environmental Group, Inc (PACIFIC) on behalf iof Chevron U S A Products Company (Chevron), presents the results of a soil investi- gation conducted at the site referenced above (Figure 1) The purpose of tlus investiga- tion was to obtain and analyze soil samples in the area of the former product islands and the current underground storage tanks (USTs) Both of these locations are upgradient 5 or crossgradient of a monitoring well (MW-2) in which hydrocarbons have been ,detected Me investigation was performed in accordance with PACIFIC's WolkPlan dated June 22, 1995 This letter report includes a discussion of site background, previ- ous investigations, scope of work, and findings Field and laboratory procedures and boring logs are presented as Attachment A Certi- fied analytical reports and chain-of-custody documentation are presented as Attach- ment B Historical groundwater data is presented as Attachment C STTE BACKGROUND The service station is located at the intersection of Pacific Avenue and Benjamin Holt Drive in Stockton, California Land use surrounding the site is primarily commercial Several known fuel leak cases are located in the vicinity of the site \ 5 In December 1986, the station was remodeled and the three USTs, three fuel islands, and product piping were replaced The tank complex was backfilled rand new USTs were 2025 Gateway Place, Suite 440, San Jose, California 95110 (408)441-7500 FAX (408) 441-7539