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t <br /> AMBRIA <br /> 03 SIP 22 PM 12: 52 <br /> ',,eptemher 10, 2003 <br /> 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 August 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 Stiffler <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-IA, using a pneumatic submersible pump, and treated by four <br /> 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) system was included in Cambria's Groundwater Extraction System <br /> Installation Report dated July 27, 2001 <br /> MONTHLY COMPLIANCE ACTIVITIES <br /> Self-monitonng Sample Date August 20, 2003 <br /> Laboratory Analyses Total petroleum hydrocarbons as gasoline, benzene, toluene, ethylbenzene, <br /> xylenes, and methyl tertiary butyl ether(MTBE) are analyzed by EPA 8260, pH by EPA 150 1, and <br /> Cambria total petroleum hydrocarbons by EPA 1664 GWE system analytical data are summarized in Table 1 <br /> Environmental Analytical Results Laboratory analytical results indicate that samples taken from our final discharge <br /> Technology,Inc <br /> point were below the permit specified discharge limits for all analyzed constituents The laboratory <br /> !Hollis Street report for the required monthly samples, collected on August 20, 2003, is presented in Appendix A <br /> Suite A <br /> Emeryville CA 94608 <br /> Tel(510)420-0700 <br /> Fax(510)420-9170 <br />