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Phase I Environmental Site Assessment Project#:99-1261 Proposed AutoZone Site.Manteca,California February 19, 1999 Pape 10 f There were no indications in the databases reviewed that indicated an unauthorized release originated from this site. This site is located approximately five-hundred(500) feet northwest of the subject site. Of the nine (9) sites listed in the environmental databases within an eighth mile radius of the subject site, five (5) sites reported unauthorized releases. Of the five (5) sites listed with a release, four (4) cases have not been closed by the regulatory i agencies. The one(1) site not closed is the Diamond Lumber Company site located on the adjacent property to the south of the subject site. However, site specific documentation reviewed indicated chat the unauthorized release on the Diamond Lumber Company site has not adversely impacted the groundwater beneath the subject site. Historical Use/Aerial Photograph Review The San Joaquin County Survey Department were contacted for aerial photographs, for the subject site. The San Joaquin County Survey DI-partrnent maintains a range of photographs dating from 1937 to the present. The sets of aerial photographs reviewed are described as follows: Photograph # 116 R, Dated January 1983 Two (2) large structures are located on the western half of the subiect site and eastern portion of the site appears to be fenced. A large building is also present on the property to the south, the current structure, and two large rectangular structures are present on the northern property. i Photograph #K-9, Dated November 8, 197 The subject site appears as it did in the 1983 photograph. Photograph #ABD-2CC-174, June 3, 1963 The subject site appears as it did in the 1975 photograph. Photograph #ABD-4K-11, Dated August 14, 1952 A single moderately sized structure is located on the eastern half of the subject site, the western half appears vacant. One (1) large structure, the current structure, is present on the adjacent site to the south as is a large rectangular building covering the southern property line.