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SITE CONTAMINATION WORK PLAN <br /> Waterloo Liquor <br /> 2512 E. Waterloo Road <br /> Stockton,CA <br /> 1.0 INTRODUCTION <br /> Waterloo Liquor is a convenience store and gasoline station located at 2512 E. Waterloo <br /> Road in Stockton, California(Figure 1). The property is operated by Mr. Heng Chea, tinder <br /> lease from the Nevada Trustee Administration. In June 1998, three underground storage <br /> tanks were removed and replaced with one 12,000-gallon and one 15,000-gallon tank. <br /> During the tank removal, contaminated soil was observed at the base of the tank excaN ation, <br /> and gasoline hydrocarbons were also detected in samples collected from the excavated soil. <br /> The excavated soil was subsequently removed and disposed of at Altamont Landfill in <br /> Pleasanton, California. These activities, and the laboratory results,were described in the <br /> Tank Removal Report prepared by Upgradient Environmental in June 1998. <br /> In March 1999,the local oversight agency, San Joaquin County Public Health Services, <br /> Environmental Health Division,requested the Responsible Parties to investigate the <br /> subsurface extent of the contamination. PHS/EHD set a deadline of June 1, 1999 for receipt <br /> of this work plan. <br /> 2.0 SITE LOCATION AND DESCRIPTION <br /> Waterloo Liquors is located at the intersection of Waterloo Road and Filbert Street in <br /> Stockton, California (Figure 1). Until June 1998, unleaded gasoline was stored in three <br /> 12,000-gallon underground tanks that were located between the dispenser island and the <br /> convenience store, and were partly covered by the dispenser island (Figure 2). Afler the <br /> island was demolished and the tanks were removed, they were replaced by the present <br /> 15,000-gallon and 12,000-gallon tanks and new dispenser islands were constructed. <br /> The area along Waterloo Road is zoned for commercial uses. Most of Filbert Street is zone <br /> for residential use. Topography in the area is flat. <br /> 3.0 TANK REMOVAL AND LABORATORY RESULTS <br /> The tanks were removed by Hoblitzell & Associates, General Contractors. All three Avere in <br /> good condition, with slight to moderate rust but no holes. Petroleum staining was noted <br /> around the fill port of the easternmost tank (tank #3 in Figure 2) and in the soil between <br /> tank 42 and #3. Three samples were collected from beneath each tank at a depth of <br /> approximately 16 feet, and 8 samples were collected from the excavated soil. The stockpile <br />