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(A u `= <br /> September 27, 2001 <br /> Mr. Michael J. Infurna, Jr., Senior REHS <br /> LOP/Site Mitigation Unit IV <br /> San Joaquin County Public Health Services e1!Pf I <br /> Environmental Health Division <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> Re: Work Plan for Pilot Testing,Aquifer Testing, Soil Treatibility Study, and <br /> Sensitive Receptor Survey <br /> Former Canteen Facility <br /> 1500 Shaw Road, Stockton, California <br /> Site Code 1727 <br /> AES Proposal No. 16 0109 01 <br /> Dear Mr. Infurna: <br /> i <br /> On behalf of the Compass Group USA, Inc., Applied Earth Sciences, Inc. (AES) has prepared this work G <br /> plan in response to correspondence from the San Joaquin County Public Health Services, Environmental <br /> Health Division (PHS-EHD), dated August 27, 2001. The scope of work is for performance of a soil <br /> vapor extraction (SVE) and in-situ air sparging (IAS) pilot study, aquifer pumping test, soil treatibility i <br /> study, and a sensitive receptor survey at the referenced site. <br /> As part of the Problem Assessment Report (PAR), AES evaluated fourteen remediation technologies <br /> according to their performance, reliability, and applicability to the site-specific conditions. Three of the <br /> fourteen technologies screened were deemed feasible for remediation of both the impacted soil and <br /> groundwater at the site. These technologies included In-Situ Air Sparging, In-Situ Well Aeration, and <br /> Enhanced Bioremediation. At the conclusion of the proposed pilot testing/treatibility analyses, AES will <br /> prepare a Corrective Action Plan (CAP)including the test data, conclusions, and recommendations for <br /> the most cost effective site remediation technology. <br /> 1.0. SCOPE OF WORK <br /> AES proposes the following scope of work to determine the most cost-effective remediation <br /> alternative(s) for the Canteen Facility. <br /> • Additional Well Installation - Three wells will be installed in the vicinity of the former tank pit <br /> (MW-13/13A/13B) for the SVE/IAS pilot testing and collection of treatibility study soil <br /> samples. One two-inch diameter VES monitor point well will be installed in the vadose zone <br /> with a screen section extending from approximately 10 to 40 feet below ground surface (bgs). <br /> One four-inch diameter VES test well will be installed in the vadose zone with a screen <br /> 2013 Wells Branch Parkway, Suite 206 • Austin, Texas 78728 • Tel: (512) 990-7467 • Fax: (512) 990-7399 <br />