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500 12th Street <br /> 1 <br /> Suite 100 WoodwaM.Clyde Consultants <br /> Oakland,CA 94607-4014 <br /> (415)893-3600 <br /> September 2, 1988 <br /> �. 8820011A Sl <br /> D <br /> Gettler-Ryan, Inc. 3 'xSF3� <br /> 1992 National Avenue PN 1 <br /> �.. <br /> Hayward, CA 94545 <br /> 4 <br /> Attention: Mr. Jeff Ryan PERM <br /> Subject: Environmental Assessment Report <br /> Former Chevron USA Service Station 6155 <br /> Stockton, California <br /> ` Enclosed is a report summarizing the results of Woodward-Clyde Consultants' <br /> environmental assessment of shallow soils 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 /> gasoline or BTEX in the soil samples from borings C-A, C-B, and C-C. <br /> However, low concentrations of benzene,,.,,(O..12..a d 0.16 ppm from depths of 197 <br /> to 20.5 feet and 29 to 30.5 feet, respectivelyj_ were detected in Boring <br /> C-D. Soil samples from Boring C-A were also analyzed for high boiling <br /> point 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, 22gro�+ ndwa er monitoring wells are <br /> documented within a one-half mile radius of the sie. <br /> ' We appreciate the opportunity to provide consulting services on this <br /> �. project. Please call if we can be o additional assistance. <br /> Sinceri, <br /> WO OD WACiYi#E CONSULTANT <br /> C. <br /> Michael S. Bonkowski 0. Glenn Heyma <br /> ` Senior project Geologist Senior Staff Geologist <br /> CEG 1329 <br /> OGH:cd <br /> 8820011ST5 CON <br /> L Consulting Engineers,Geologists <br /> and Environmental Scientists <br /> ' Offices in Other Principal Cities <br /> 6. <br />