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SECTION 1 <br /> INTRODUCTION <br /> This document is a work plan for a soil and ground water <br /> investigation of the former underground storage tank (UST) site <br /> located in Stockton, California (San Joaquin County) (Figure 1-1). <br /> The tank was situated adjacent to an active warehousing facility at <br /> 1325 West Weber Avenue (Figure 1-2). The facility is currently <br /> occupied by Graphic Contractors <br /> A copy of the investigation work pian request letter for this site is <br /> included in my P <br /> County <br /> dix A. The request letter was written by San <br /> Joaquin Ca yubh c Health Services, Environmental Health <br /> Division <br /> Tank History <br /> The proposed investigation area formerly contained one <br /> underground fuel storage tank which was situated immediately <br /> adjacent to a warehouse. ERM-West, acting on the behalf of Catellus <br /> Development Corporation managed the tank removal activities in <br /> August 1991 under a permit issued by the San Joaquin Department of <br /> Public Health Services. Jim Dobbas Inc , located in Newcastle, <br /> California, provided the construction services. Ramos <br /> Environmental Services in West Sacramento, California, provided <br /> services to empty, transport, and dispose the contents of the tank at <br /> their facility <br /> The top of the former tank was approxiimaete 1 The fuelow the <br /> had a <br /> ground surface and the bottom was at e <br /> capacity of approximately 500 gallons A total of 403 gallons of liquid <br /> (water with some gasoline) was removed from the tank during tank <br /> removal activities. The tank was severely corroded and contained <br /> several holes It was of single wail steel construction and was <br /> primarily used to store gasoline. There is no information available to <br /> indicate the total quantity of product that escaped from the tank. <br /> om the tank excavation <br /> Samplesindicated theil cwater obtained r esene of total petroleum hydrocarbons as gasoline <br /> iridic P <br /> and diesel, and total xylenes (Table 1-1) <br /> 1-1 <br />