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C AM B R I A -- �J <br /> PPR Al AI 2003 <br /> int ili `,4 t,'� J dtALF[I April 10, 2003 <br /> "'T LKIRVICES <br /> Mr Robert J Castelli <br /> Technical Services Supervisor <br /> c/o Mr Richard Stiffler <br /> City of Stockton Department of Municipal Utilities <br /> Environmental Control Section <br /> 2500 Navy Drive <br /> Stockton, CA 95206-1191 <br /> Re March 2003 Self-Monitoring Report <br /> Shell-branded Service Station <br /> 2575 Country Club Blvd <br /> Stockton, California <br /> Incident 98996184 <br /> SAP 136144 <br /> Dear Mr Castelli <br /> On behalf of Equilon Enterprises LLC dba Shell Oil Products US (Shell), Cambria Environmental <br /> Technology, Inc (Cambria)presents this self-monitoring report for the referenced site <br /> GROUNDWATER EXTRACTION SYSTEM DESCRIPTION <br /> Groundwater is extracted from well RW-1A, using a pneumatic submersible pump, and treated by <br /> three granular activated carbon(GAC)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 A detailed description of the subject site and <br /> groundwater extraction (GWE) was included in Cambria's Groundwater Extraction System <br /> Installation Report dated July 27, 2001 <br /> I <br /> MONTHLY COMPLIANCE ACTIVITIES <br /> Self-monitorsng Sample Date March 25, 2003 <br /> Laboratory Analyses: Total petroleum hydrocarbons as gasoline,benzene,toluene,ethylbenzene,and <br /> Cambria xylenes, and methyl tertiary butyl ether by EPA 8260, pH by EPA 150 1, and total petroleum <br /> Environmental hydrocarbons by EPA 1664 GWE system analytical data are summarized in Table 1 <br /> Technology,Inc <br /> 'i Hollis Street Analytical Results- Laboratory analytical results indicate that samples taken from our final discharge <br /> A pomt were below the permit specified discharge limits for all analyzed constituents The laboratory <br /> EmeTrille CA 94608 <br /> Tel(510)420-0700 <br /> Fax(510)420-9170 <br />