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J* <br /> ED <br /> lie <br /> SRI, <br /> July 10, 2001 <br /> Mr. Michael J. Infurna, Jr., Senior RENS <br /> Il San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Street <br /> Stockton, California 95202 <br /> Re: Problem Assessment Report(PAR) <br /> Former Caht&n Facility <br /> 1500 Shaw Road,Stockton,California <br /> Site Code 1727 <br /> Dear Mr. Infurna: <br /> Applied Earth Sciences, Inc. (AES),in response to correspondence from the San Joaquin County Public <br /> Health Services,Environmental Health Division, dated January 22, 2001,is pleased to enclose one copy of <br /> our Problem Assessment Report(PAR),including the quarterly groundwater data from the first and second <br /> quarters of 2001. <br /> PROJECT OBJECTINES <br /> This Problem Assessment Report his four Ti4n objectives: <br /> 0 Assess the current levels of hydrocarbons in the soil and groundwater at the site due to a <br /> previously removed underground storage tank(UST). <br /> 0 Use historic data,as well as the analysis from the most recent quarterly groundwater <br /> gauging and sampling event,to assess the stability of the groundwater plume. <br /> 0 Determine the lateral and vertical extent of the current levels of hydrocarbons in the <br /> Site's groundwater and soil. <br /> 0 Propose remedial actions to clean up the above:reference site. <br /> The enclosed report presents a site history, field observations,results, conclusions and recommendations <br /> for additional work. AES has prepared this report in accordance with generally accepted environmental <br /> practice. <br /> Please feel free to contact me at 512-990-7467,extension 212,if you have any questions or comments. <br /> Sincerely, <br /> APPLIED EARTH SCIENCES,INC, <br /> D <br /> -CO <br /> Eric W. Muelilberger,RG(CA#525 ERIC <br /> MUEHLBERGEpt <br /> Senior Hydrogeologist It <br /> rt <br /> Enclosure No.5255 <br /> i Cc: Richard Belthoff, Jr., Compass Group USA,irv/enclosure <br /> Marty Hartzell, Central Valley RWQCB, w/enclosure 4r <br /> 2013 Wells Branch Parkway, Suite 206 • Austin, Texas 78728 • Tel: (512) 990-7467 Fax: (512) 990-7399 <br />