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EC R VOW S O hilerllatiolial Illcolporated ENVIRONMENTAL HEALTH DIVISION 304 E. Weber Ave.Third Floor October 28, 1998 P. O. Box 388, Stoc06n CA 95201-0388 Approved " Project 7GO07-018-01 Denied ❑ : 1,,,))Conditions tiEF LMQXy_-> Mr. Brett Hunter Chevron Products Company Date 11_'l ,r1S —by P.O. Box 6004 i1'1'�RSI rywYvt J-f Z 6tJ(Z"55 San Ramon, California 94583-0904 G N)Diwou!s" ( k",~ Re: Work Plan for Site Assessment Former Chevron Station 9-6258 � 'rvGcc ',i ` .. ai. 2409 East Main Street at F Street Stockton, California ' Dear Mr. Hunter: �� 0i)L(5D w . This letter, prepared by SECOR International Incorporate of t7Xrr Chevron Products Company(Chevron), presents a work plan for further site assessment > �t at the subject site (Figures 1 and 2). The purpose of the proposed work is to further define the extent of gasoline hydrocarbons in soil and to confirm the presence and :: evaluate the extent of gasoline hydrocarbons in groundwater. The proposed work will include the drilling of three soil borings and installation of monitoring wells in the areas of the former gasoline underground storage tanks (USTs) and product islands. This work plan includes a brief discussion of site background, proposed scope of work, e and schedule. SITE BACKGROUND ' The site is located at the northeast corner of East Main Street and F Street in Stockton, CA. Currently, the site is vacant, and was previously utilized as a Chevron service station. Former facilities on the site included three gasoline USTs, one waste oil UST, underground product piping and associated dispensers. The USTs were reportedly installed at the site in 1955 and the gasoline USTs were reportedly removed in 1976. The waste oil tank was removed in 1996. The former USTs consisted of three steel-walled gasoline fuel tanks (one 5,000-gallon supreme, one 2,000-gallon mid-grade, and one 5,000-gallon regular) and one steel-walled 550-gallon waste oil tank (Figure 2). No information regarding the installation or removal of the gasoline USTs and associated facilities were available. PREVIOUS INVESTIGATION {„ In February 1995, The Mark Group performed a Phase I Environmental Site Assessment (ESA) at the site and concluded that further investigation be performed. In April 1995, ' 9912&isino;s Par)Dnve, Suite 100. Sac ramoilo. CA 95827 (916).;(1 i-1880(Q 16 1,364-1889 F:-1 V invu,�:rcor com , :;