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S <br /> CAMBRIA <br /> 03 NOV 13 PM 2: 23 <br /> November 11, 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 October 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-1A,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 /> Monthly Flow Data Between September 23, 2003 and October 14, 2003, the total discharge was <br /> 74,250 gallons, which corresponds to an average flow rate of 2 46 gallons per munute <br /> Discussion Cambria received the City of Stockton's notice of violation letter, which included <br /> Cambria stringent discharge limits for DIPE, ETBE, TAME and TBA considered effective immediately, on <br /> Environmental October 14, 2003 Jn order to avoid violation of the new permit conditions, Cambria immediately <br /> Technology,Inc ceased discharge to the sewer by shutting the GWE system off on October 14, 2003 Therefore, <br /> vHis sheet effluent samples were not collected for the.month of October 2003 Cambria's Notice of Violation <br /> 0 Response Letter, which includes a detailed response to the City of Stockton's letter and revised permit <br /> Emeryville CA 94608 <br /> Tel(510)420-0700 <br /> Fax(510)420-9170 <br />