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-- ' Chevron U.S.A. <br /> Page 4 <br /> 3.0-- P�poSE AND SCOPE <br /> The Purpose and Scope of our investigation was outlined <br /> T_ in Dames & Moore's Proposed Remedial Action Plan of September <br /> 15, 1989, addressed to Chevron U.S.A. P er <br /> The plan was modified <br /> in an addendum to the plan dated January 8, 1990. The <br /> Purpose of the remedial action was to <br /> reduce the potential ' <br /> ,. <br /> for further migration of contamination found in site soils. <br /> -_ The scope of services performed ,included the following <br /> Ing <br /> �- o Obtaining <br /> the commencement Ofrthes and authorization prior <br /> remediation; the field <br /> Portion of the <br /> 0 Observation -of site remediation activities; <br /> o Field screening of soil with a <br /> detector (PID) to help direct theoremedialtion <br /> -. activity; <br /> Obtain soil samples at the limits of the <br /> excavation, as directed by the site representative <br /> Of San Joaquin County <br /> o Chemical analysis of soil samples to evaluate the <br /> Presence and concentration of petroleum <br /> constituents as referenced to gasoline; <br /> o Observe aeration of soil and collect composite <br /> samples at the frequency Specified b <br /> Water Quality Control Board: Y the Regional <br /> o Observe backfilling of the excavation; and <br /> 0 Report our findings and conclusions. <br /> - 16000-250-044 <br /> corrected <br />