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GEOMATRIX 2.1 SITE SETTING AND VICINITY USE The site is located at 35275 Welty Road in a rural area used for light industrial activities, and is bounded by Welty Road to the east and Byron Highway (Highway 33) to the northeast(Fig- ure 2). The site is bounded on the south, southwest, and southeast by orchards. Currently the site is used to manufacture containers; historical uses included the production of cans. The site is located within the Central Valley Physiographic Province of California. The Central Valley is bound to the west by the Coast Ranges and to the east by the Sierra Nevada Ranges. The Central Valley subsurface consists of unconsolidated Quaternary sediments to 400 feet or more below ground surface (WHF, Inc., 1996a). Figure 1 is a site location map. The area topography is relatively flat(elevations of approximately 100 to 105 feet MSL at the site) and slopes downward gently(approximately 66 ft/mile)to the northeast. The site is located approximately 1100 feet north of the Hetch Hetchy Aqueduct, 3 miles southwest of the San Joaquin River, 3 miles northeast of the Mendota Canal, and 350 feet northwest of the San Joaquin-Stanislaus County boundary. The former Old Valley Pipeline (OVP)was operated by Standard Oil (predecessor to Chevron and now ChevronTexaco) and transported heavy petroleum (crude and Bunker C fuel oil) from Bakersfield to Richmond, California, from the early 1900s to the 1960s. The OVP was located along the northeastern side of the site, parallel to the existing Union Pacific railroad tracks. Also present between the site and Highway 33 was the former Tidewater Associated Oil Company Pipe Line (TAOC) (predecessor to Texaco and now ChevronTexaco) that transmitted heavy crude from the Central Valley to the Bay Area from the early 1990s to the 1970s when it was decommissioned. Hereinafter, "OVP" shall collectively refer to both the OVP and TAOC pipelines unless otherwise stated. A Kinder Morgan Energy Partners, L.P., petroleum product pipeline that reportedly transports gasoline,jet fuel, and diesel is located between the site and Highway 33. Western Farm Service (WFS) is located directly northeast of the site, and has stored, blended, and distributed bulk liquid and dry fertilizers since 1969. WFS operated a groundwater extrac- tion and treatment system from 2000 through 2001 and is currently conducting a groundwater bioremediation pilot test and quarterly groundwater monitoring. Reportedly, a former gas sta- tion was located northeast of the site. I:\Doc_Safe\6000s\6447.001\OffSite Rpt\US Can SoilGW Rpt 2003.doc 2