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_ Wright <br /> j Environmental r;t <br /> Services, Inc. <br /> Construction ♦ Engineering ♦ Remediation Q J 1 `'`t{'V/(� <br /> January 22, 2002 26 <br /> Project No. 4872-01-TR P / •2 J <br /> Mr. Paul Verma <br /> City of Tracy <br /> 520 Tracy Blvd. <br /> Tracy, CA 95376 <br /> Re: Joe Wilson Center Underground Tank Removal and Expedited Site <br /> Contaminated Soil and Groundwater Removal, <br /> 1141 Adams Street, Tracy, CA <br /> Dear Mr. Verma: <br /> Wright Environmental Services, Inc. (Wright) is pleased to present this letter report for <br /> the above referenced project for the City of Tracy (City) involving a tank removal and <br /> site contamination assessment. As you know this letter report was prepared on your <br /> behalf as required by the County of San Joaquin Public Health Service — Environmental <br /> Health Division(PHS-EHD). <br /> Underground Fuel Tank Removal <br /> One fuel oil underground fuel storage tank (UST) was used on-site. A recent inspection <br /> by the City indicated that a tank removal was needed during a seismic building upgrade <br /> project, which included renovations to the existing parking lot. The fuel oil tank was <br /> reportedly out of service some time ago when boilers located in the building were <br /> removed. City representatives expressed a desire to remove a limited amount of <br /> contaminated soil to minimize future disturbances to the newly constructed parking lot. <br /> On November 29, 2001, the tank was removed and disposed of by Wright under PHS- <br /> EHD permits and observation. After the removal, areas of obvious contamination were <br /> observed by Wright and by a PHS-EHD representative in the field. On the basis of these <br /> field observations and the City of Tracy's intent to conduct limited interim cleanup <br /> activities, PHS-EHD had requested a work plan to address contaminated soil removal <br /> (interim remediation cleanup) and limited assessment of soil and groundwater <br /> contamination in the pit area. A total of 4 grab soil samples were taken on November 29, <br /> 2001 (two from tank pit and two from stockpile) under PHS-EHD supervision using the <br /> sampling procedures discussed in Wright's workplan. <br /> Soil stockpiled on-site showed that contaminants were not detected and as such, was <br /> determined as fit for use as backfill. Analytical results from sample TK-1 north showed <br /> areas of contamination only under the north side of where the UST was previously <br /> located (see Figure 1). Laboratory analytical results with chain-of-custody can be found <br /> in Attachment A. <br /> 67 E. 10th Street ♦ Tracy,CA 95376 <br /> 209.833.0758 • Fax 209.832.5152 <br /> wright@inreach.com Lie, #651501 A-B HazMat ice♦ <br /> websit hap:Ahome.inreach.comhvright Page 1 �/ <br />