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AST # 1503 Spill Report and Work i for Additional Assessment 2 ST Services Terminal #29 2941 N Drive Stockton Ca July 30, 2002 estimated at greater than 1 ,000-gallons . The spilled diesel was visible in the crushed rock on the southern and eastern sides of AST # 1503 . An ST Services Incident Report was filled out for the release of diesel fuel from the 15 ,000-barrel capacity AST . On June 7 , 2002 , the following agencies were notified about the release : National Response Center, Stockton Fire Department, Port of Stockton , the State of California Office of Emergency Services , Ramos Environmental , and the San Joaquin County Office of Emergency Services . Upon discovery of the fuel release , absorbent pads were placed around the base of the AST . Philips Services was contracted to excavate and properly dispose of approximately 20 tons of diesel-contaminated soil . PROPOSED SCOPE OF WORK The scope of work will include the drilling of Geoprobe° soil borings to assess the extent of diesel fuel saturated soil adjacent to the AST fuel release area. The specific scope of work is discussed below : • Site Safety Plan. As required by the Occupational Health and Safety Administration (OSHA) Standard "Hazardous Waste Operations and Emergency Response" guidelines (29 CFR 1910 . 120) , and by the California Occupational Health and Safety Administration (Cal-OSHA) "Hazardous Waste Operations and Emergency Response" guidelines (CCR Title 8 , Section 5192) , SECOR will update the current site-specific Health and Safety Plan (HASP) prior to the commencement of fieldwork. The HASP will be reviewed by the field staff and contractors before beginning field operations at the site . • Permitting. Soil boring permits will be obtained from the San Joaquin County Environmental Health Department (SJCEHD) . • USA and Notification . Prior to drilling SECOR will mark the location of each soil boring and use a private utility locator to clear each location . Underground Service Alert will be called to allow the local underground utility companies to identify the location of any utilities in the area of the proposed work. The Port of Stockton, Regional Water Quality Control Board — Central Valley Region, and SJCEHD will be notified of the scheduled assessment work 4 & hours prior to drilling. • Soil Borings. Seven soil borings will be drilled at the locations shown on Figure 2 . A truck mounted Geoprobe° will be used to drill six soil borings . Samples will be collected by hand auger in areas inaccessible to the Geoprobe® . The geoprobe borings will be drilled through groundwater to approximately 9 feet below ground surface (bgs) . The depths of the borings will be based on field visual observation and photo-ionization detector (PID) readings with a minimum total depth of nine feet to ensure vertical definition . L•\ST Services Stockton\Reports\Diesel AST 1503 Spill Report & WP.doc