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Cot 'r S <br /> 19449 Riverside Drive,Suite 230,Sonoma, California 95476 <br /> Telephone: 707.935.4850 Facsimile: 707 9356648 <br /> www.CRAwrn <br /> orld.co <br /> Mr.Mark Clardy <br /> Central Valley Regional Water February 22 2008 <br /> 11020 Sun Center Drive Quality Control Board _ <br /> Rancho Cordova, Suite 200 <br /> C„-:,�„ „E D <br /> California R� j-t <br /> Re: Site investigation Work Plan <br /> Shell Pipeline FF.t� 2 7 2008 <br /> Vernalis Site ENVIRONMENT HEALTH <br /> I-580 at South Bird Road Overpass PERMIT/SERVICES <br /> Tracy, California <br /> Dear Mr.Clardy: <br /> Conestoga-Rovers & Associates (CRA) <br /> Prepared this work plan on behalf of Equilon Enterprises <br /> dba Shell Oil Products US (Shell). The proposed scope of work presented in this document will comply <br /> with San Joaquin Court LLC <br /> ty Environmental Health Department (SJCEHD) and Regional Water Quality <br /> Control Board(RWQCB)guidelines, <br /> SITE DESCRIPTION AND BACKGROUND <br /> The subject site is located northeast of the South Bird Road Overpass at Interstate 580 in Tracy, <br /> California (Figures 1 and 2). The site is owned by Granite Construction Company, Inc, (Grann <br /> referred to by Granite as the Vernalis site. Granite intends to develop the site as a gravel quarry,ite) ad is <br /> A summary of previous work performed at the site and additional background information is contained in <br /> Attachment A. <br /> WORK PLAN <br /> Technical Rationale for Proposed Scope of Work <br /> • The extent of crude oil remaining after excavation activities needs further assessment. <br /> • Twenty-three soil borings will be drilled at and around locations where over 500 milligrams per <br /> kilogram total petroleum hydrocarbons as crude oil (TPHcrude) were detected in soil samples <br /> Equal <br /> Employment <br /> Opportunity Employer <br /> worldwide Engineering, Environmental,Construction, cad IT Services <br />