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C A M B R I A „ - <br /> 1J September 30, 1999 <br /> Mr. Harlin Knoll ENVIRONMENTAL HEALTH DIVISION <br /> I San Joaquin County Public Health Services 304 E. Weber Ave.Third Floor <br /> Environmental Health Division P O. Box 388, St c€cton CA 95201-0388 <br /> 304 East Weber Avenue; Third T-16or Approved <br /> Stockton, California 95202 Denied <br /> Conditions <br /> Re: Site Investigation Work"Plan <br /> Shell-branded Service Station; Date (J <br /> 420 West Kettleman Lane W <br /> j Lodi, California - <br /> ! SAP Code 135445 <br /> Incident No. 98995525 <br /> SJCPHS/EHD Site Code: 19061 <br /> Dear Mr. Knoll: <br /> Cambria Environmental Technology, Inc. (Cambria) pri epared this work plan on behalf of <br /> Equiva Services LLC in response to the July 22, 1999 San Joaquin County Public Health <br /> i Services Environmental Health Division (SJCPHS/EHD) letter requesting additional <br /> investigation at the above referenced site. The purpose of this investigation is to further <br /> delineate the vertical extent of petroleum hydrocarbons and methyl tertiary butyl ether <br /> (MTBE) in soil beneath the site. The scope of work prel ented:in this work plan will comply <br /> with SJCPHS/EHD and Central Valley Regional Water Quality Control Board (RWQCB) <br /> guidelines. <br /> SITE BACKGROUND <br /> Site Description: The subject site is located on the southeast corner of Hutchins Street and <br /> West Kettleman Lane in a primarily commercial area oflLodi,.California (Plate 1). The site <br /> layout includes a station building, five dispenser islands, and an' underground fuel storage tank <br /> F <br /> (UST) complex (Plate 2). <br /> I <br /> Previous Investigations: In September 1989, Aegis Environmental (Aegis) drilled 15 soil <br /> Oakland, CA <br /> Sonoma, CA borings in preparation for a proposed tank replacement project. Total .purgeable petroleum <br /> Portland, OR hydrocarbons calculated as gasoline (TPPH) was detected in boring B-8 at a concentration of <br /> Seattle, WA 1060 .parts per million (ppm). Petroleum hydrocarbons were riot detected (ND) in the other <br /> borings with the exception of trace concentrations of toluene and xylenes in borings B-1, <br /> Cambria <br /> i Environmental B-7, and B-9. The results of this investigation are documented in Aegis' October 16, 1989 <br /> Technology,Inc. Pre-Tank Replacement Site Assessment Results Report. <br /> 270 Perkins Street " <br /> P.O.Box 259 <br /> Sonoma,CA 95476 �� f <br /> I Tel(707)935-4850 <br /> Fax(7o7)935-6649 <br /> 1 <br />