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6 Chevron U.S.A. - Page 3 TECHNICAL APPROACH Based upon the information provided to this office regarding the subject property, coupled with the review of the published ground water data and review of previous investigations at the subject property, the following proposed work plan has been developed to help identify the presence of contamination in subsoils and possible impact to ground water at the subject property. In order to accomplish the goals established for the proposed investigation, the work Lwould be separated into four distinct tasks as follows: I. Literature survey and research of readily available data regarding site history and use, geologic and hydrogeologic conditions, and previous site investigations; II. Field investigation to advance exploratory soil borings for the purpose of logging subsurface conditions and obtaining subsoils samples for chemical analysis. Three ground water monitoring wells would then be completed in the soil borings advanced at the subject property. These locations will be selected is areas generally located at or near corners of the subject property to identify ground water depths, gradient, direction of flow, ground water quality, and long term monitoring. Based upon field observations, the investigation of both soil Cand ground water would be contiguous while at the subject property. III. Laboratory analysis of subsoil and ground water samples obtained from the field investigation to determine the presence and concentration of petroleum constituents contamination; IV. Prepare a written report which details the findings of our Investigation. The written report would include recommendations regarding noted conditions at the subject property as well as recommendations regarding possible future Phase III work for area-specific characterization and delineation of contaminants. a TASK I: Literature Surye-y The literature survey and published data research portion of the investigation would be conducted to gather specific information regarding conditions at the subject property. Interviews with Chevron personnel will be conducted to help determine previous site use and site history. Published data review of geologic and hydrogelogic conditions win be conducted to help define the existing conditions at the subject property. The literature survey should help to reduce the amount of field investigation necessary by providing a clearer understanding of the prevailing conditions. TASK II: Field Invests ation The field investigation portion of the investigation will include the exploratory drilling and sampling of subsoils, and installation of ground water monitoring wells, and the development and sampling of ground water monitoring wells.