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Remediation Feasibility Pilot Study Work Plan CHEROKEE TRUCK STOP 3535 East Cherokee Road,Stockton, California 1.0. INTRODUCTION At the request of Mr. Ellis Cecchini of Cecchini, Cecchini, and Giovannoni, Advanced GeoEnvironmental, Inc. (AGE)has prepared this Remediation Feasibility Pilot Study Work Plan (Pilot Study) for 3535 East Cherokee Road, Stockton, California(site). The scope of work within the Pilot Study includes the installation of three(3)soil vapor extraction(SVE)wells that will be used to complete a high vacuum SVE Test examining possible soil remediation and to collect soil and ground water samples to be used in an Ozone Injection Bench Scale Test (Ozone BST) for possible ground water remediation. The site setting is illustrated on Figure 1. -Proposed work, structures,monitoring wells and soil boring locations are illustrated on Figure 2. AGE previously made recommendations(Quarterly Report-Third Quarter 2007,dated 03 January 2008) to the San Joaquin County Environmental Health Department (EHD) which presented remediation technology alternatives to mitigate the petroleum hydrocarbon-impacted ground water plume and the shallow hydrocarbon-impacted soil. A Pilot Study was proposed to evaluate the feasibility ofthese remediation technology alternatives.On 07 April 2008,the EHD approved AGE's recommendations made in the Quarterly Report- Third Quarter 2007, dated 03 January 2008 by telephone communication.This Pilot Study was prepared in accordance with the California Regional Water Quality Control Board's Tri-Regional Board Staff Recommendations for Preliminary Evaluation and Investigation of Underground Tank Sites guidelines for investigation of UST sites. 2.0. SCOPE OF WORK Based on the analytical results from the previous site assessments,AGE purposes to perform a high vacuum SVE Test that will evaluate the effectiveness of the SVE technology on shallow hydrocarbon-impacted soil and an Ozone BST that will evaluate the effectiveness of ozone injection on the ground water. Both of these remedial efforts will occur within the area of the highest petroleum contamination(former pump island area and tank locations)and prepare for the widescale remediation of impacted soil and ground water at the site. The scope of work will consist of the following tasks: • Permitting,planning and pre-field work activities; • Drilling and soil sampling for saturated soil; • Collection of ground water samples from existing ground water monitoring wells; • Performance of an in-laboratory Ozone BST; and • Evaluation of the Ozone BST with preparation of a report of findings. Advanced GeoEnvironmental,Inc.