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Revised Preliminary Endangerment Assessment Work Plan Former RV CIRCUITS FACILITY 916 South Center Street, Stockton, California 1.0. INTRODUCTION At the request of Mr. John Hinkel, owner of the above -referenced property, Advanced GeoEnvironmental, Inc. (AGE) has prepared this Revised Preliminary Endangerment Assessment Work Plan for the former RV Circuits facility. This revised work plan incorporates the comments of the Department of Toxic Substances Control (DTSC) reagrding the original work plan of 30 May 2000. This work plan includes a sampling plan and a site safety plan. The scope of work is to collect samples of various media on the site for laboratory analysis to assess for metals -impacted soil and/or ground water on the site. The location of the site is illustrated in Figure 1. A plan view of the site is illustrated on Figure 2. This work plan has been prepared utilizing Preliminary Endangerment Assessment Guidance Manual, prepared by the California Environmental Protection Agency - Department of Toxic Substances Control (DTSC) as a guideline for this subsurface investigation. The scope of work presented in this work plan is an outgrowth of a scoping meeting held at the site on 14 March 2000 between representatives of the DTSC, AGE, Mr. John Hinkel and the County of San Joaquin Public Health Services - Environmental Health Division (PHS-EHD). 2.0. BACKGROUND According to Sanborn Fire Insurance Maps issued in 1895, 1917 and 1950, the subject site was utilized for various domestic structures. The 1972 Sanborn Map shows what appears to be the commercial structure currently occupying the site, which was utilized as an auto painting facility. The structure had concrete floors; no storage of hazardous materials was noted on the map. Selected Haines Directories for Northern San Joaquin Valley, issued between 1971 and 1998 and selected Polk Directories issued between 1912 and 1967 were reviewed at the San Joaquin County, Caesar Chavez Library in Stockton to compile a record of occupants of the property. The directories list information by street name then by address. Haines Directories prior to 1971 were not available for review. Polk Directories prior to 1912 list information by occupant and not by street, from 1912 to 1956 they list only Stockton and Lodi street names and from 1957 to the present list only Stockton street names. The Polk Directories list residential occupants of the property from 1935 to 1959, no listing from 1960 to 1971, Rainbow Body Shop from 1972 to 1975; "no return" from 1976 to 1986, California Water Service in 1987 and 1988, and RV Circuits in 1990. The Haines Directories list the Rainbow Body Shop in 1971, 1974, 1978 and 1981; no listing for 1986; RV Circuits in 1990 and 1994; and had no listings for 1999 and 2000. The Haines directory indicated that the first RV Circuits listing was in 1989. Advanced GeoEnvironmental, Inc