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Stantecsulting Corporation ' <br /> 3017 Kilgore Road Suite 100 <br /> Rancho Cordova CA 9.5670 <br /> Tel:.(916)861-0400 . - <br /> i <br /> Fax:(916)861-0430 <br /> SbntK <br /> "ECEN D <br /> �D. <br /> January 6, 2010 <br /> JAN 0 $ 2010 <br /> Ms. Lori Duncan ENVIRONMENT HEALT <br /> HSan Joaquin Count Environmental Health De artment <br /> 600 East Main Street PER�[T/SERVICES <br /> Stockton, California 95207 <br /> Reference: Response to.SJCEHD Letter Dated June 8, 2009. <br /> Chevron-94275 and'ARCO 2133 Commingled Plume . <br /> 2905 and 2908 West Benjamin Holt Drive <br /> Stockton, California 95207 <br /> Commingled Plume Account No:CP0034 <br /> Dear Ms. Duncan: <br /> Stantec Consulting Corporation (Stantec) .has.prepared t-his letter"on behalf of Atlantic RichfieldCompany <br />'ll (ARCO), a BP affiliated Company and Chevron.Environmental Management Company (CEMC), in response <br /> to the San Joaquin County Environmental Health .Department.'(SJ'CEHD) 'letter dated June 8, 2009 <br /> (Attachment A): The SJCEHD's letter requested that'the'Responsible: Party assess remedial technologies <br /> and implement active remediation of the significant,contamination that lies in the vicinity of well E-10 in order <br /> to achieve Water Quality Objectives at the site in a timely manner. <br /> SII _ <br /> An internal peer review meeting.was conducted in November 2009. between Stantec, BP and CEMC to <br /> discuss possibilities for active remediation in:the vicinity of well E-10 (Figure 1). Well E-10 is located within <br /> close proximity to the fuel dispenser islands and product piping as well as under the station's can opy.`'Drilling, <br /> excavating or trenching in this area would be extremely difficult and health and safety could be compromised. <br /> Therefore, it was determined that active remediation is.not feasible'.in this location under the site's current <br /> configuration. <br /> If you have any questions or comments; please,contact meat(916) 86.1-0400 x270. <br /> Sincerely, <br /> STANTEC CONSULTING CORPORATION <br /> lJ <br /> Brian Westhoff <br /> Geologic Consultant <br /> Information, conclusions, and recommendations provided by Stantec in this document regarding the site have <br /> been prepared under the supervision of and reviewed by the licensed professional whose signature appears <br /> below. <br />