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it <br /> f SECOR <br /> International incorporated <br /> CDP, J 0 Pj <br /> ` 05 <br /> April 6, 2000 <br /> Project 077 41991 500 <br /> �G <br /> Mr Ron Rowe a` <br /> San Joaquin County Environmental Health Division <br /> 304 East Weber Ave 3`d floor <br /> Stockton, CA 95201-0388 <br /> Re Request for Site Closure <br /> Chevron Service Station 9-6258 <br /> 2409 East Main Street at F Street <br /> Stockton, California <br /> Dear Ron Rowe <br /> This letter has been prepared by SECOR International Incorporated (SECOR) on behalf <br /> of Chevron Products Company regarding site closure/"no further action" at the above <br /> referenced site (Figure 1) This letter presents a historical summary of remedial actions <br /> at the site, and an overview of current groundwater conditions <br /> BACKGROUND <br /> The site is located at the northeast corner of East Main Street and F Street in Stockton, <br /> CA Currently, the site is vacant, and was previously utilized as a Chevron service <br /> station Former facilities on the site included three gasoline USTs, one waste oil UST, <br /> underground product piping and associated dispensers The USTs were reportedly <br /> installed at the site in 1955 and the gasoline USTs were reportedly removed in 1976 <br /> The waste oil tank was removed in 1996 The former USTs consisted of three steel- <br /> walled gasoline fuel tanks (one 5,000-gallon supreme, one 2,000-gallon mid-grade, and <br /> one 5,000-gallon regular) and one steel-walled 550-gallon waste oil tank (Figure 2) No <br /> information regarding the installation or removal of the gasoline USTs and associated <br /> facilities were available <br /> PREVIOUS INVESTIGATION <br /> In February 1995, The Mark Group performed a Phase I Environmental Site <br /> Assessment(ESA) at the site and concluded that further investigation be performed In <br /> April 1995, The Mark Group performed a preliminary subsurface investigation <br /> involving the drilling of six soil borings The Mark Group reported residual <br /> concentrations of hydrocarbons in the former UST excavation backfill Groundwater <br /> 9912131es1P2e57 Park Dme, Suzfe 100 Sacramento CA 95827 (916) 304-1880 (916_)364-18891-a% wzuw secot com <br />