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1.0INTRODUCTION <br /> 0 Kwikee Foods is a convenience store and former gasoline filling station located on Country Club <br /> Boulevard in Stockton, California. The property is owned by Mr. William Peters, and has been <br /> leased out for several years. Following the discovery of gasoline in groundwater beneath the site in <br /> 1990, the site was placed in the Local Oversight Program of San Joaquin County Department of <br /> Health Services, Environmental Health Division (PHS/EHD) and assessment of the extent of <br /> contamination was initiated. Mr. Peters retained Upgradient Environmental Consultants in 1994 to <br /> install two additional monitoring wells and begin quarterly groundwater monitoring. Mr. Peters <br /> retained SEMCO, Inc. to remove the two underground gasoline storage tanks in 1998, and shortly <br /> thereafter Upgradient Environmental completed the assessment of soil contamination by drilling <br /> five borings around the perimeter of the UST excavation. In early 2000, Mr. Peters was accepted <br /> into the State UST Cleanup Fund Program, and subsequently obtained bids from Upgradient <br /> Environmental and two other consulting companies to install additional monitoring wells to further <br /> evaluate the extent of groundwater contamination. Mr. Peters retained Upgradient Environmental in <br /> June, and the work was performed during July, August, and September. The purpose of this report <br /> is to present the results of this newest phase of investigation. <br /> 2.0 BACKGROUND D10ORMAT ION <br /> 2.1 Site 1Loc$tion and Description <br /> The project site is located at 2081 Country Club Boulevard in west-central Stockton. The location <br /> of the site is shown in Figure 1, and the site facilities are shown in Figure 2. The site is located in a <br /> residential/commercial area, and the local topography is flat. A Chevron gasoline station was <br /> formerly located across Franklin Street from the site. The station has been demolished and <br /> remediation of the site is scheduled to begin shortly. <br /> 2.2 Summary of Previous Results <br /> Groundwater monitoring wells KF-1, KF-2, and KF-3 have been sampled on several occasions <br /> since early 1995, and gasoline-range hydrocarbons have been detected each time. Well KF-3 is <br /> located closest to the former tank facility, and is the most severely impacted. The groundwater flow <br /> direction is generally east-northeast, and well KF-2 is therefore more impacted than KF-1. <br /> Holes were found in both 10,000-gallon unleaded storage tanks when they were removed in March <br /> 1998. Five Geoprobe® borings were drilled in May 1998 around the former UST cavity, and three <br /> of the five probes found evidence of soil contamination. Based on the results, Upgradient <br /> Environmental calculated that the volume of contaminated soil is approximately 550 cubic yards, <br /> with average TPH-g and benzene concentrations of 100 and 0.1 mg/kg, respectively. <br /> 3 <br />