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WORK PLAN FOR PRELIMINARY SITE ASSESSMENT <br /> Marino Brothers Trucking <br /> 3516 Newton Road <br /> Stockton, California <br /> 1. 0 INTRODUCTION <br /> In accordance with a request from Mr. John Urrutia of the Bank of <br /> Stockton, Geological Audit Services, Inc. (GeoAudit) has prepared <br /> this work plan to perform a preliminary site assessment of the tank <br /> areas at 3516 Newton Road, Stockton, California (the site) . The <br /> location of the site is illustrated in Figure 1 . <br /> The assessment will include the drilling of three (3) soil borings <br /> in the area of the underground storage tanks (UST' s) and two <br /> borings near the former above ground storage tanks. The boring <br /> locations are illustrated in Figures 2 and 3 . <br /> 2 . 0 BACKGROUND <br /> The site is located in a flat industrial/commercial area of <br /> northeastern Stockton. Three large buildings are currently located <br /> on-site. The property was operated as a truck fueling station until <br /> 1992 . The UST facility consists of three fuel tanks, five fueling <br /> islands and their associated piping. The property is currently <br /> operating as a truck dispatch yard. <br /> The UST facility consists of two 10, 000-gallon diesel tanks and one <br /> 10, 000-gallon unleaded tank. However, it is believed that the <br /> unleaded tank once contained leaded gasoline. It is our <br /> understanding that two above ground storage tanks were also located <br /> on the property. It is believed that the above ground tanks <br /> contained diesel and/or waste oil. <br /> The three underground fuel tanks are located at the northwest <br /> corner of the property. One above ground storage tank was located <br /> near the western side of the property and one was located near the <br /> center of the property, south of the UST' s (see Figure 2) . <br /> 3 . 0 PROCEDURES <br /> GeoAudit proposes to perform a soil drilling and sampling program <br /> to determine to what extent the operation of the storage facility <br /> has negatively impacted the soil . Three borings will be drilled in <br /> the area of the underground storage tanks and advanced to a depth <br /> of 30 feet. Two borings will be installed in the areas of the above <br /> ground storage tanks and advanced to a depth of 15 feet. However, <br /> if field screening of soil samples indicates that contamination is <br /> present at greater depths, and upon client approval, at least one <br /> boring at each area will be advanced until contamination is no <br /> longer encountered or groundwater is encountered. <br />