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C A M B R I A <br /> September 12, 2006 <br /> Mr. Richard Stiffler <br /> OMI-Thames Water Stockton, Inc. <br /> 2516 Navy Drive <br /> P.O. Box 6249 <br /> Stockton, California 95206 ' <br /> Re: August 2006 Self-Monitoring Report u <br /> Former Shell Service Station SVP -f_ 20016 <br /> 2575 Country Club Boulevard ENVIR0f*v1t I`d I- ; EA1 TI{ <br /> Stockton, California PER ,MiT/SrRk/10E ' <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 /> The revised GWE system design includes extracting from existing monitoring wells RW-IA, MW-5R, <br /> MW-8, and MW-18 using pneumatic submersible pumps. The revised treatment design includes <br /> groundwater treatment by two 2,000 pound (lbs) granular activated-carbon (GAC) vessels in parallel <br /> I with two 2,000-lbs GAC vessels which are in series with two 1,000-lbs GAC vessels prior to <br /> discharge into the sanitary sewer. <br /> l 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-monitoring <br /> sample program in a letter dated October 10, 2003 . The permit has been renewed, with some revised <br /> terms and conditions, as of November 1 , 2005 . <br /> i <br /> i <br /> Monthly Flow Data: No discharge of groundwater occurred during August 2006, and monthly self- <br /> monitoring samples were not collected for this period. <br /> Cambria <br /> Environmental <br /> Technology, Inc. <br /> 2000 Opportunity Drive <br /> Suite 110 <br /> Roseville,CA95678 <br /> Tel (916) 677-3407 <br /> Fax (916) 677-3687 <br />