ARCHIVED REPORTS_MONITORING WELLS INSPECTIONS, REPAIR AND REDEVELOPMENT REPORT

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2.0 PURPOSE AND SCOPE OF WORK The purpose of this PSA was to review present and past site land use in order to evaluate the possible presence of hazardous substances in soil and/or groundwater at the site. This assessment was accomplished by, and limited to, a review of readily available documentation of land use history for evidence of the use, storage, and/or disposal of hazardous substances on the site, and a site reconnaissance to observe present site conditions. Dames & Moore's scope of services included the following elements: • Review of pertinent, available documents and maps regarding local geologic and hydrogeologic conditions; • Review of readily available historical aerial photographs of the site vicinity for the years 1963, 1970, 1980 and 1990 from the collection of Geonex Cartwright, Inc. in Sacramento, California and for the year 1934/35 provided by the Port of Stockton; • Review of the United States Geological Survey 7.5-minute topographic map of the Stockton West, California quadrangle; • Review of documents provided by the Port of Stockton regarding the site and its development; • Performance of a reconnaissance survey of the subject property and the area within a 1/2-mile radius of the site to make visual observations of existing site conditions and activities, and types of land use and businesses in the site vicinity; • Interviews during the site visit with Ms. Patricia Huff, General Manager, Trade and Property Development for the Port of Stockton; Mr. Richard Martucci, Marketing Manager for the Port of Stockton; and Captain Jack Addison, Manager of Delta Bulk Terminals; • Review of state and federal lists of known or potential hazardous waste sites or landfills and sites currently under investigation for environmental violations. Table 1 is a summary of the agency lists reviewed; rsn04.007 2