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19449 Riverside Drive,Suite 230,Sonoma,Califorriia 95476 <br /> CONESTOGA-ROVERS Telephone: 707.935.4850 Facsimile: 707.935.6649 <br /> &ASSOCIATES www.CRAworld.com <br /> July 18,2008 <br /> Ms. Margaret Lagorio <br /> San Joaquin County Environmental Health Department <br /> 600 East Main Street D <br /> Stockton,California 95202 <br /> Re: Site Investigation Work Plan <br /> Independent Shell-branded Service Station �aV1 i0f�dV�ti�1 HEf\y-L! <br /> 4315 Waterloo Road awl <br /> Stockton, California <br /> SAP Code 136143 <br /> Incident No. 98996183 <br /> Agency Case No. 1760 <br /> Dear Ms.Lagorio: <br /> Conestoga-Rovers & Associates (CRA) prepared this work plan on behalf of Equilon Enterprises LLC <br /> dba Shell Oil Products US (Shell) to further assess the extent of petroleum hydrocarbons and fuel <br /> oxygenates in groundwater beneath the referenced site (Figures 1 and 2) as requested by the San Joaquin <br /> County Environmental Health Department(SJCEHD) in their June 6, 2008 letter to Shell. The proposed <br /> scope of work complies with SJCEHD and Central Valley Regional Water Quality Control Board <br /> (RWQCB)guidelines. <br /> SITE LOCATION AND DESCRIPTION' <br /> The subject site is an active independent Shell-branded service station located on the north side of <br /> Waterloo Road near Piccoli Road in a mixed industrial and agricultural area in Stockton, California <br /> (Figure 1). Shell ceased,operations at the site during March 2005 and sold the property and station to the <br /> current owner during May 2005. Prior to their removal, two underground storage tanks (USTs) and four <br /> dispensers were present at the site(Figure 2). <br /> SITE INVESTIGATION WORK PLAN <br /> Based on a review of soil and groundwater monitoring data, the- SJCEHD requested that the Shell <br /> perform additional vertical.and horizontal assessment. Shell's proposed scope of work is presented <br /> below. <br /> Equal <br /> Employment , <br /> Opportunity Employer <br /> .- Worldwide Engineering,Environmental,Construction,and IT Services <br />