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SUSTAINABLE STRATEGIES FOR GLOBAL LEADERS <br /> October 12, 2009 <br /> Mr. Michael J. Infurna, Jr., Senior REHS, CA Reg.. #5649 <br /> LOP / Site Mitigation Unit IV <br /> San Joaquin County Environmental Health Department <br /> 600 East Main Street <br /> Stockton, California 95202-3029 ! � <br /> RE: Third Quarter 2009 — Site Update Report <br /> Former Canteen Facility <br /> 1500 Shaw Road <br /> Stockton; California <br /> Site Code 1727 <br /> Delta Project No.: FAOS-005-1 <br /> Dear Mr: Infurna: <br /> Delta Consultants (Delta) was retained by ,Compass Group USA, Inc. <br /> (Compass) to conduct continued operations of_ a groundwater and soil <br /> remediation system on the property located at 1500 Shaw Road in <br /> Stockton, California (Site). A topographic site location map is presented + <br /> on Figure 1. <br /> The system was installed to remediate impacted groundwater and soil at <br /> D E. L T°A the Site, in 'accordance with State of California regulations. The <br /> remediation system consists .of air sparging (AS) and soil vapor <br /> extraction (SVE) applied in unison to the impacted. areas. The overall <br /> system includes 13 AS wells and f=ive (S) SVE wells. A site details map, <br /> including the layout of the Remediation System, is presented on Figure <br /> 2. <br /> REMEDIATION SYSTEM OPERATIONS AND MONITORING I <br /> I <br /> I <br /> Delta has installed and operated an approved soiland groundwater <br /> remediation system at the site under the following timeline: <br /> Feil-Mar 2004: A remediation system was installed at the site as i <br /> indicated by the layout on Figure 2. The system consisted of air <br /> sparging (AS) in. conjunction with soil Vapor extraction (SVE). <br /> Initially, a trailer-mounted internal combustion engine (ICE) unit, <br /> which also destroyed hydrocarbon vapors recovered from the <br /> subsurface; provided vacuum for the SVE system. SVE system <br /> operations were initiated in March 2004. <br /> ,i <br /> Apr 2005: Operations of the AS-SVE Remediation System were <br /> suspended and the ICE unit was removed while an updated <br /> Authority to Construct application was prepared and submitted to <br /> the SJVAPCD. + <br /> 9009 Mountain Ridge-Drive Suite 110 Austin,-Tx 78759 USA <br /> Phone: 512.990.7467/800.477.7411 Fax: 512.990.7399 w w_w ,f e 1 t a e n v.c o m i <br /> I <br /> I <br />