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2.0 SITE DESCRIPTION Information concerning the subject property was obtained from a site inspection conducted by Julie Moore of Dames & Moore on April 28, 1998, interviews with tenants and the subject property owner, and review of the documents referenced in Section 8.0 of this report. 2.1 PHYSICAL LOCATION AND DESCRIPTION OF PROPERTY The subject property consists of a 65-acre parcel developed with eight metal frame warehouse-type buildings, vacant graded land, concrete and asphalt-paved parking areas, a stormwater runoff pond, a truck wash area, and some landscaped areas. The site is located east of the intersection of McKinley Avenue and Ashley Lane. A site location map is presented as Figure 1. 2.2 ENVIRONMENTAL SETTING Environmental characteristics including local topography, geology, and hydrogeology were evaluated based on site observations,published literature,previous environmental assessments,and maps. The USGS topographic map which covers the subject property (Lathrop, California, 1952, photorevised 1987) indicates that the subject property is relatively level land situated approximately 20 feet above mean sea level. The nearest surface water is the San Joaquin Irrigation District Canal located immediately east of the Union Pacific Railroad tracks bordering the site to the east. The subject property is located near the center of the San Joaquin Valley within the Central Valley geomorphic province. The subject property lies approximately two miles east of the San Joaquin River. The site vicinity is relatively flat,with slopes less that five feet per mile to the west. No natural surface drainage features are present at the site. The central part of the valley underlying the property is filled with over 1,000 feet of sediments derived form the surrounding mountains. Important water bearing units in the vicinity include the Mehrten, Laguna, Tulare and Victor formations. The top of the Mehrten lies at a depth of about 900 feet in this area. It is overlain by the Laguna Formation consisting of several hundred feet of discontinuous sand and silt lenses with some clay and gravel. The Laguna Formation merges with its equivalent on the west side of the valley, the Tulare Formation, in the vicinity of the San Joaquin River. A confining layer,the Corcoran Clay,is found near the top of the Tulare. The Victor Formation, which overlies the Laguna on the eastern side of the valley, thins and blends into the Laguna in the vicinity of the subject property. R:VW98JCM.013 4 DAMES&MOORE