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Chevron U.S.A. - Page 4 <br /> and hydrogeologic conditions in the vicinity of the subject property were used to <br /> help evaluate and assess possible subsurface contamination conditions in subsoils <br /> and ground water at the subject property. <br /> The scope of services included the completion of the following tasks: <br /> o Research and review of pertinent, readily available geologic and hydrologic <br /> r literature and review of available previous investigation reports; <br /> L� o Obtaining-any -necessary permits prior to the commencement of the field <br /> portion of the investigation; <br /> o Drilling and sampling of subsoils for chemical analysis; <br /> o Installation, development and sampling of a ground water monitoring wells; <br /> o Chemical analysis of ground water samples to detect the presence and <br /> concentration of petroleum constituents; <br /> �i o Preparing a report to present our findings and general conclusions. <br /> 4.0TECHNICAL APPROACH <br /> Based upon the information provided to this office regarding the subject <br /> property, coupled with the review of the published ground water data and review <br /> of previous investigations at the subject property, the following technical <br /> Lapproach was employed to evaluate contamination conditions at the subject <br /> property. <br /> A total of 3 exploratory soil borings were advanced at the subject property <br /> at the locations shown on the Site Plan which is included as Plate 2 of this <br /> report. The purpose of those soil borings was to provide data regarding the <br /> subsurface conditions and to install ground water monitoring wells. Field <br /> screening of the subsoils samples with and Hnu photoionization detector was <br /> DAMES & MOORE <br />