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TANK CLOSURE REPORT BEACON STATION #494 2185 EAST FREMONT STREET STOCKTON, CALIFORNIA Acton • Mickelson • van Dam, Inc. (AMV), has been authorized by Ultramar Inc. (Ultramar), to conduct soil sampling as required during underground storage tank removal at Beacon station #494, 2185 East Fremont Street, Stockton, San Joaquin County, California. The site is located on the northwest corner of the intersection of "D" and East Fremont Streets (Figure 1). The surrounding area is a mix of residential and commercial properties. 1.0 BACKGROUND Petroleum product storage at the site consisted of three 10,000-gallon, single-wall steel, underground storage tanks for motor vehicle fuel storage. The former location of the underground tanks is illustrated on Figure 2. The northernmost tank contained unleaded gasoline; the middle tanks contained midgrade unleaded, and the southernmost tank contained supreme unleaded. Previous work at the subject site by AMV included the installation of five ground water monitoring wells and four dual-completion vapor extraction wells, and advancement of two soil borings. A more detailed description of soil and ground water investigations conducted at the subject site is contained in AMV's "Soil and Ground Water Investigation Report," dated June 4, 1992, and "Additional Soil and Ground Water Investigation Report," dated February 11, 1993. 2.0 UNDERGROUND STORAGE TANK REMOVAL AND RELATED SOIL SAMPLING B&C Construction of Sacramento, California, was the general contractor for the tank removal. The underground storage tanks were triple-rinsed by H&H Environmental Services (H&H) prior to removal. The tank rinsate was transported by H&H to their facility in San Francisco, California, for disposal. On March 8, 1993, the existing underground storage tanks were removed. Removal of the tanks was witnessed by Mr. Kenneth Earnest of Ultramar and Ms. Carol Oz and Mr. Mike Infurna of the San Joaquin County Environmental Health Department (San Joaquin County). The tanks were inspected upon removal. No holes were found in the tanks, and they appeared to be in good condition. The tanks were transported by H&H to their facility for metal salvaging.