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i <br /> CAME <br /> SEP�° r 200 <br /> ` September 14 2005 <br /> Evinur <br /> Mr Richard Stiffler PFgr,l T/OPTICr" <br /> City of Stockton Department of Municipal Utilitieti <br /> En-vironmental Control Scf-tion <br /> 2500 Navy Drive <br /> Stockton, California 95206-1191 <br /> Re August 2005 Self-Monitoring Report <br /> Former Shell Service Station <br /> 2575 Country Club Boulevard <br /> Stockton, California <br /> Incident 98996184 <br /> SAP 136144 <br /> Dear Mr Stiffler <br /> On behalf of Equilon Enterprises LLC dba Shell Oil Products US, Cambria Environmental <br /> Technology, Inc (Cambria) presents this self-monitoring report for the referenced site <br /> GROUNDWATER EXTRACTION (GWE) SYSTEM DESCRIPTION <br /> Groundwater is extracted from well RW-IA,using a pneumatic submersible pump,and then treated <br /> by four granular activated-carbon vessels in series prior to discharge into the sanitary sewer The <br /> discharge is authorized under a City of Stockton wastewater discharge permit originally issued on <br /> October 23, 2000 and revised on June 28, 2002 The City of Stockton issued a revised self- <br /> monitoring sample program in a letter dated October 10,2003 A detailed description of the site and <br /> GWE system is included in Cambria's Groundwater Extraction System Installation Report dated <br /> July 27, 2001 <br /> Self-Monitonng Sample Date August 8, 2005 <br /> Laboratory Analyses Samples were analyzed for total petroleum hydrocarbons as gasoline, <br /> benzene,toluene,ethylbenzene,xylenes,methyl tertiary butyl ether,di-isopropyl ether,ethyl tertiary <br /> butyl ether, tertiary-amyl methyl ether, and tertiary-butyl alcohol by EPA 8260B, for pH by <br /> EPA 150 1, and for total petroleum hydrocarbons by EPA 1664 GWE system effluent analytical <br /> tambna data are summarized in Table I <br /> Environmental <br /> Technology, Inc <br /> oftllisSlteel <br /> Suite A <br /> Emeryville CA 94608 <br /> Tel(510)420-0700 <br /> Fax(510)420-9170 <br />