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C A M B R I A <br /> i <br /> October 11, 2004 <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 September 2004 Self-Monitoring Report <br /> Former Shell Service Station <br /> 2575 Country Club Boulevard <br /> Stockton, California <br /> is 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-monitonng 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 The City of Stockton issued a revised self-monitonng <br /> sample program in a letter dated October 10, 2003 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 Flow Data The system was shut down on August 5, 2004 No discharge of groundwater <br /> occurred during September 2004 and monthly self-monitoring samples were not collected for this <br /> period <br /> Cambria <br /> Environmental <br /> Technology, Inc <br /> 0 <br /> 0 Hollis Street <br /> Suite A <br /> Emeryville CA 94608 <br /> Tel(510)420-0700 <br /> Fax(510)420-9170 <br />