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y Well Installation and Feasibility Study Work Plan - November 2004 LARRY'S AUTO 308 North Grant Street, Stockton, California 1.0. INTRODUCTION At the request of Mr. Charles Skobrak, Advanced GeoEnvironmental,Inc. (AGE)has prepared this work plan for installation of one ground water extraction well and the performance of a ground water extraction feasibility test at 308 North Grant Street, Stockton, California(site). The location of the site is illustrated on Figure 1. A map of the site showing well and structure locations is illustrated on Figure 2. In letters dated 31 August and 03 November 2004, the San Joaquin County Environmental Health Department (EHD) requested the preparation of a work plan for interim remediation feasability testing to reduce and contain further off-site migration of ground water impacted by high concentrations of methyl tertiary butyl ether (MTBE), 1,2-dichloroethane and other petroleum hydrocarbon compounds. The purpose of this work plan is to determine the feasibility of ground water extraction as an interim remedial option at the Larry's Auto site. 2.0. BACKGROUND The site is located in a commercial area of low topographic relief in central Stockton, on the northeast comer of the intersection of Grant Street and Miner Avenue.The site is currently operated as Larry's Auto Repair and was formerly operated as De Rollo Mazda. Additional site background information can be found in Appendix A. 3.0. SCOPE OF WORK The proposed scope of work will consist of the following tasks: • Permitting and pre-field work preparations; • Drilling and soil sample collection; • Installation and development of a ground water extraction well; • Ground water aquifer extraction(pump) testing; and • Preparation of a report of findings. Each of these tasks are discussed below in detail. Advanced Geo Ene'ironmen[al,Inc.