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i <br /> 1.0 INTRODUCTION <br /> WaterWork Corp has been contracted by Chevron U.S.A. Inc. to <br /> prepare a site characterization workplan for the Carnation Company <br /> lease portion of their facility located at 540 North Aurora Way in <br /> Stockton, California (Figure 1) . This work is required by San <br /> Joaquin County public Health Services in correspondence dated <br /> - October 10, 1990. <br /> _ 2.0 SITE BACKGROUND <br /> The site is located on the northeast corner of Fremont and Oak <br /> r streets in Stockton, California. The site is currently owned by <br /> Chevron U.S.A. Inc. The southeastern portion of the site is leased <br /> to the Carnation Company which has operated a distributorship for <br /> Carnation diary food products for over 35 years. The facility <br /> contained three underground product storage tanks which were used <br /> by the Carnation Company to provide fuel for six vehicles. Two <br /> 3,500 gallon tanks containing leaded and diesel fuels and one 4,000 <br /> gallon tank containing leaded fuel were located in the northeast <br /> corner of the Carnation facility (Figure 2) . No other maintenance <br /> activities were conducted onsite. <br /> • 3.0 PREVIOUS INVESTIGATIONS <br /> In 1987, three underground g product storage tanks and all ancillary <br /> piping was removed from the site. Soil samples from beneath the <br /> i <br /> fill end of each tank were collected and analyzed by Canonie <br /> Environmental (Figure Z) . Selected samples were analyzed for <br /> benzene, toluene, xylenes (BTX), total extractable hydrocarbons, <br /> " ethylene dibromide, and total lead. Based on the results of the <br /> , < analyses, the site was approved "closed" without further remedial <br /> activities. Due to a recent change in regulatory requirements for <br /> lead, the soils beneath two of the tanks exceeded current <br /> regulatory levels of 13 mg/kg. <br /> r <br /> In December 1989, WaterWork Corp. drilled and sampled 5 soil <br /> borings to determine the extent of lead impaction in the vicinity <br /> Chevron U a s Inc - 397 x r <br /> F!d R033791 TLP <br /> 1 <br />