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$. ' SITE HEALTH AND SAFETY PLAN ' SITE DESCRIPTION The site is located at 814 East Charter Way in the city of Stockton in San Joaquin County, California (Figure 1) The site was formerly operated as a gasoline service station ' The site is situated within a mixed commercial and residential area Nearby properties are primarily commercial businesses The overall site topography is tessentially flat with a very slight fall to the west SITE HISTORY Based on a review of analytical results, and conversations with Richard Warren, the project manager for the tank removal contractor Crisp Construction Company, on December 27, 1991, a 5,000 gallon underground leaded gasoline storage tank, a 5,000 gallon underground unleaded gasoline storage tank, a 2,000 gallon underground ' premium unleaded gasoline storage tank, a 500 gallon underground waste oil tank, a dispenser island, and associated product pipelines were removed from the Morita Brothers Service Station which was formerly a mini market and gasoline sales facility Reportedly, no soil was removed from the site during removal of the tanks and dispensers, the areas displaced by the former tanks were filled by backfilling the ' excavated soil along with imported soil ' During the UST removal activities soil samples were collected from beneath the tanks, dispensers, and product pipelines Subsequent laboratory analysis of the soil ' samples indicated that concentrations of total petroleum hydrocarbons (TPI-1) as gasoline and the gasoline constituent volatile aromatics beneath the north end of the ' gasoline product pipelines, and beneath the former 5,000 gallon underground i unleaded gasoline storage tank were in excess of State Water Resources Control Board (WRCB) Action Levels for these compounds in soil 1 Based on these analytical results, ESE was retained to perform a site characterization A total of seven soil borings were drilled within this phase of soil characterization A