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I <br /> anteagroup <br /> Antea USA,Inc. <br /> 9009 Mountain Ridge Drive Suite 110: <br /> Austin Texas 78759 USA e, ¢ 5113 <br /> www.a6teagroup.com. <br /> Mby6,2011 <br /> 6,2011 <br /> Mr. Michael J. Infurna,Jr.,Senior REHS CA Reg.#5649 <br />` LOP/Site Mitigation UnItIV I <br /> San Joaquin County Environmental Health Department <br /> 600 East Main Street 6) l <br /> Stockton, California 95202-3029 n <br /> i <br /> Re: Request for No Further Action /1 <br /> Former Canteen Facility' <br /> 1500 Shaw Road <br /> i <br /> Stockton, California <br /> Site Code 1727 <br /> AnteaGroup Project No:FAGS-OOS-1 <br /> I <br /> Dear Mr:Infurna: <br /> Anteal Group(formerly Delta Consultants)was retained by Compass Group USA, Inc. (Compass)to h <br /> conduct continued operations of a groundwater and soil remediation system at the Former Canteen <br /> Facility(Site)located at 1500 Shaw Road in Stockton;California. <br /> 1 <br /> The system was installed,'to remediate impacted,groundwater and Soil at the.Site, in accordance <br /> With State of California regulations The remediation system consists of air sparging and soil vapor <br /> extraction applied in unison to the impacted areas. The overall system includes thirteen (13)AS <br /> wells and five (5) SVE wells. A site details map, including the Remediation System Layout, is <br /> presented on Figure 1. <br /> The Remediation System has been in operation since the spring of 2004 and Antei Group believes <br /> the Site has reached a point where a Request for,No Further Action (NFA) is appropriate. Several <br /> areas were reviewed to support this conclusion: <br /> 1. Declining Returns on Remediation-System 0perati0_ns <br /> 2. Reduction in Hydrocarbon Mass' <br /> 3. Declining Hydrocarbon Concentrationsin Monitor Wells <br /> 4. Realistic Projections for Attenuation of Remaining Concentrations <br /> r <br /> 5. (Projected Site and.Groundwater Use <br /> Further details regarding these points are presented ori the following pages. <br /> *nog€t?` <br />