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1.0 INTRODUCTION <br /> As a result of subsurface petroleum hydrocarbon impact beneath Chevron U S A Service <br /> Station 9-6171, in Stockton, California (Figures 1 and �), Chevron U S A Products Company <br /> (Chevron) has been engaged in investigation and monitoring program In order to develop the <br /> remedial approach, Chevron retained Pacific Environmental Group, Inc (PACIFIC) to <br /> prepare this corrective action plan (CAP) This plan was prepared pursuant guidelines <br /> contained in CCR Chapter 16, Article 11 The purpose of the plan is to provide a framework <br /> for remediation, considering all pertinent regulatory guidance, site conditions, site remediation <br /> constraints, and probable future uses of the site <br /> 1.1 Previous Subsurface Investigations <br /> Soil and groundwater investigations at the site have been conducted by Groundwater <br /> Technology, Incorporated (GTI), Dames and Moore (D&M), and Sierra Environmental <br /> Services (Sierra) Investigative work included a soil vapor survey, the installation of <br /> groundwater monitoring wells (MW-1 through MW-7), soil sampling of the former under- <br /> ground storage tanks (USTs) excavation, well abandonment (MW-1), and a limited off-site <br /> source search <br /> 1.2 Document Format <br /> Within this document, a conceptual site model is developed (Section 2 0), and site water <br /> quality, public health, and safety goals are identified (Section 3 0) The need for remedial <br /> action is outlined in Section 4 0 In Section 5 0, remedial objectives are identified, remedial <br /> technologies are screened and assembled into remedial alternatives, alternatives are evaluated, <br /> and a specific alternative is recommended An implementation schedule is proposed and is <br /> included herein as Section 6 0 <br /> i <br /> 3201357B1CAP l Apnl 4, 1995 <br />