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,I- <br /> f CAM B R I G <br /> I <br /> June 12, 2006 <br /> Mr. Richard Sflffler <br /> OMI-Thames Water Stockton, Inc. <br /> 2516 Navy Drive p <br /> P.O. Sox 6249 HEC�I� � M ® <br /> Stockton, California 95206 <br /> Re: May 2006 Self-Monitoring Report JUN L006 <br /> Former Shell Service Station ENVIRONMENT HEALTH <br /> 2575 Country Club Boulevard PERMIT/SERVICES . <br /> © Stockton, California <br /> Incident 98996184 O 7 ( <br /> SAP 136144 1—yttNyl v <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 /> i <br /> The GWE and treatment system design includes pumping from one existing monitoring well <br /> (RW- IA) using a pneumatic submersible pump and treatment by four granular activated-carbon <br /> vessels in series prior to discharge into the sanitary sewer. Discharge is authorized under a City of <br /> Stockton wastewater discharge permit originally issued on October 23, 2000 and revised on <br /> June 28, 2002. The City of Stockton issued a revised self-monitoring sample program in a letter <br /> dated October 10, 2003 . The permit has been renewed, with some revised terms and conditions, as of <br /> November 1, 2005 . A detailed description of the site and GWE system is included in Cambria' s <br /> Groundwater Extraction System Installation Report dated July 27 , 2001 . <br /> i <br /> Monthly Flow Data: No discharge of groundwater occurred during May 2006, and monthly self- <br /> monitoring samples were not collected for this period. <br /> a <br /> Discussion: Most of the GWE system equipment, excluding the carbon treatment vessels, was stolen <br /> Cambria from the site between November 21 and November 28, 2005, rendering the system inoperable. Since <br /> Environmental GWE system redesign plans are already underway, no discharge will take place until the new GWE <br /> Technology, Inc. <br /> a system is installed. The new system will be built to comply with the revised permit requirement for <br /> 5900 Hollis Street hard piping, except for the connections between carbon treatment vessels. <br /> Suite A <br />'i Emeryville, CA 94608 ` <br />�d Tel (510) 420-0700 <br /> Il <br /> Fax (510) 420-9170 <br />