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1 , <br /> r <br /> 4l. <br /> A M B R l A <br /> fir <br /> Nec <br /> 12 ���� � � 1!' l+3 June 12,2002 <br /> Mr Harlin Knoll <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue,Third Floor <br /> Stockton, California 95202 <br /> Re Site Investigation Work Plan <br /> Shell-branded Service Station <br /> 7700 Moreland Street <br /> Stockton, Califomia <br /> SAP Code 136146 <br /> Incident No 97259207 <br /> SJCPHSIEHD Site Code 852 <br /> Dear Mr Knoll <br /> Effective March 1, 2002, Equiva Services LLC and Equilon Enterprises LLC are now doing <br /> business as (dba) Shell Oil Products US Cambria Environmental Technology, Inc (Cambria) <br /> prepared this work plan on behalf of Shell to assess the extent of petroleum hydrocarbons and <br /> fuel oxygenates in soil and groundwater beneath the site and to identify water supply wells <br /> within 2,000 feet of the site as requested in San Joaquin County Public Health Services, <br /> Environmental Health Division (SJCPHSIEHD) correspondence dated February 20, 2002 The <br /> scope of work presented in this document will comply with SJCPHS/EHD and Regional Water <br /> Quality Control Board guidelines <br /> Site Background <br /> I <br /> Site Description The subject property is an operating Shell-branded service station located at <br /> the southeast corner of Moreland Street and HWauner Ldtiii in a mixW fikali`resi�atial area of <br /> Stockton, California (Figure 1) The station layo4iricludes three iitiderground fuel storage tanks <br /> (USTs), a waste oil UST,four product dispensers,and a station bdildirig(Figure 2) <br /> Previous Investigations: Cambria collected one soil sample near the northwestern dispenser <br /> land CA <br /> San kRamon CA (DP-4) on July 31, 2000 following a detected leak in tliekproauct piping between the dispenser <br /> Sono m a CA and the USTs Field observations suggest the leak was contained by,the secondary containment <br /> piping, which routed the fuel back to the USTs, resulting in no spill to the environment The soil <br /> Cambria sample that Cambria collected in native soil at approximately four feet below grade (fbg) <br /> Environmental <br /> Technology,me contained 0 130 parts per million (pprn) xylenes and 1 630 ppm methyl tertiary butyl. ether <br /> + *Ierkms <br /> (MTBE) These results are discussed in Cambria's December 27, 2000 Soil Sampling Report <br /> Street <br /> P 0 Box 259 <br /> Sonoma CQ 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br /> 7 <br />