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1.0 Introduction <br /> IT Corporation (IT) was retained by Pacific Bell to execute final soil remediation activities <br /> and prepare a Site Closure Recommendation report for their facility located at 7644 Ashley <br /> Lane in Stockton, California IT previously conducted soil and groundwater investigative <br /> activities at the facility, in an effort to assess the effectiveness of prior soil remediation <br /> activities, conducted by Versar Incorporated Results of IT's investigation revealed residual <br /> diesel concentrations in soil beneath the former tank location at 15 feet below grade IT <br /> conducted spot excavation of the residual diesel impacted soils to the maximum extent <br /> ' practicable The following report discusses field procedures for excavation and disposal of <br /> the impacted soils <br /> ■ 2.0 Site Descriptio <br /> ' Pacific Bell facility UE132 is located at 7644 Ashley Lane in Stockton, California (Figures 1 <br /> and 2) The site lies approximately 2 miles east of Highway 99, and approximately 1 5 miles <br /> north of Highway 88 The site is Iocated in the Waterloo 7 5-minute USGS topographic sheet <br /> r and is situated at approximately 48 feet above mean sea level and is essentially flat Ground <br /> elevations increase very Iittle within several miles of the site <br /> Pacific Bell facility UE132 consists of a single story building and a fenced asphalted yard on <br /> the northeast side of the building The facility is an unmanned switching terminal The <br /> facility is Iocated in a rural area of San Joaquin County The properties surrounding the site <br />' are agricultural in nature <br /> A water well is located approximately 50 feet south of the former UST location and is used <br /> r by Pacific Bell in their facility operations The well is reportedly 150 feet deep and drawns <br /> water from an aquifer 135 feet bgs This well was sampled in October 1993, with no <br /> detectable petroleum hydrocarbons encountered upon analysis <br />' 3.0 Previous Investigative Wor <br /> In April 1988, a 1,000 gallon underground storage tank containing diesel fuel, was removed <br /> from the site Diesel fuel was encountered in the samples collected beneath the tank in native <br /> soil <br /> NWO l-27-95/UST/95-0011 Or 1 <br />