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a ' <br /> cis <br /> i <br /> 50012OakiandSity treet Center Woodward-Clyde Consultants <br /> Fsn 5D0 32Eh Street <br /> g Suite 100 <br /> Oakland.CA 94607-4014 <br /> (415)893.3600 <br /> x=a <br /> February 13,..1989 <br /> t ' 8820011A-0051 <br /> t:a <br /> Gettler-Ryan, Inc. <br /> 1992 National Avenue <br /> Hayward, CA 94545 <br /> A'tention: Mr. Jiff Ryan <br /> Subject: Environmental Assessment Report <br /> Former Chevron USA Service Station 6155 <br /> Stockton, California <br /> a <br /> Enclosed is a report summarizing the results of Woodward-Clyde Consultants, <br /> _ environmental assessment of shallow sails at the former Chevron USA Service <br /> Station 6155 located at Highway 99 north of Morada Lane in Stockton, <br /> California. <br /> The shallow soils at the site are predominantly composed of clay and sand <br /> to a depth of between 9 and 14 feet, with underlying interbedded silt and <br /> �:. clay to a depth of 45 feet. The environmental laboratory did not detect <br /> _a< gasoline or BTEX in the Soil samnies from borings.0-A, C-B, and C-C. <br /> However, lour concentrations of benzene (0.12 and"0.16 ppm from depths.of 19 <br /> to 20.5 feet and 29 to 30.5 feet, respectively) were detected in Boring'- <br /> C-D. Soil samples from Boring C-A were also analyzed for high boiling <br /> pint hydrocarbons and volatile halocarbons, and none were detected. <br /> #" Groundwater was not encountered to a depth of 45 feet, the maximum depth of <br /> investigation for this site. Finally, 22 groundwater monitoring wells are <br /> documented within a one-half mile radius of the site. <br /> l <br /> We appreciate the opportunity to provide consulting services on this <br /> project. Please call if we can be of additional assistance. <br /> Sincerely, <br /> WOODWARD-CLYDE CONSULTANTS <br /> \��ERED Ged,D <br /> Richard W. Ely,..R.G.._ 0....Glenn..Heyma <br /> Project Geologist = o. ; Senior Staff Geologist <br /> Exp,��sfo <br /> OGH:cd 9lFOF cA11Fd�� <br /> 8820011ST5 CON <br /> Consulting Engineers,Geolonists <br /> and EnAronmerntal Scientists <br /> ACk <br /> IW. OVices in Other Principal Cities <br />