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Project No. 014-95262 Page No. 2 SITE DESCRIPTION The site is rectangular in shape, encompassing approximately 14.7 acres, and is located on the northwest corner of Navy Drive and Argonaut Street in Stockton, California (see Figure 2). The site is identified by San Joaquin County Assessor Parcel Number (APN) 163-260-07. The Safeway Stockton Meat Processing Plant currently occupies the site. The western % of the northern i/2 of the site is undeveloped. BACKGROUND INFORMATION Prior to the construction of the current meat processing plant in 1972, the project site was the location of military (Navy?) operations. This determination is based upon information from local regulatory agencies and review of historical aerial photographs (see Figure 3). Environmental concerns associated with this former occupant include releases from underground storage tanks possibly located near service/utility structures which appear to have been situated in the north central and southeast portions of the site. Tank contents could include refined petroleum products (gasoline, diesel, oil) or solvents (PCE, TCE, etc.). Releases from unknown point sources at the site are also a potential, as are historical impacts from off-site sources. Also of concern is the more recent discovery of a subsurface diesel release from underground storage tanks formerly used by Safeway to fuel their boiler. Numerous investigations have been conducted in the vicinity of the tanks since their removal in June, 1987. These investigations have shown diesel constituents (including BTEX) to be present in on-site soils and groundwater and in groundwater off-site to the south of the former tanks. It is not the intent of this investigation to fully and quantitatively define the impact of this diesel release, only to verify the suspected extent of diesel-affected groundwater. However, a shallow soil investigation of the former boiler diesel fuel pipeline will be conducted because this area has not been addressed during investigations to date. Meat processing operations at the site include the use of acid and caustic solutions. Waste streams include organic matter-rich process wastes, and caustics/acids from floor and equipment cleaning and from quality control laboratory activities. In addition, minor amounts of oils/solvents from maintenance ' operations could possibly enter the waste stream. These waste streams are transported by pipeline to a common sump at the on-site wastewater treatment facility. Below-grade structures at the facility include the collection sump (15,000 gal. capacity), a two-compartment clarifier ( 40,000 gal. capacity each) and KRAZAN& ASSOCIATES, INC. Offices Serving the Western United States 95262.WP