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4.0 SITE RECONNAISSANCE 4.1 Onsite Survey Representatives of Geocon performed a site reconnaissan a and personnel interview with Mrs. Hattie Poteet (Site Supervisor since January 2001) during the site visit and a phone interview with Mr. Allan Shafer (Previous Site Supervisor since 1999) on April 10, 2001. A phone interview was conducted on April 27, 2001 with Mr. Lino Cruz (FacilitLead Worker since 1995). The purpose of the reconnaissance and interviews was to determine the existing and pre-existing site conditions in order to attempt to identify visual indicators of potenti I hazardous material waste impacts to the Site. A Site Characterization Map depicting current hazardous material locations and recognized environmental conditions is presented on Figure 9. A summary of the recognized environmental conditions observed and/or documented at the Site is presented on Table 1. I Building locations and present existing site conditions are depicted on Figure 2. Site photographs obtained during the site reconnaissance are presented on Figures 10a through 10g. Information obtained from Caltrans personnel and observations noted during the site reconnaissance are summarized hereinafter. 4.1.1 Buildings The interiors and exteriors of the following onsite buildi ig improvements were observed during the site reconnaissance: Office. The office building was constructed in 1970, aid includes city water and sewer service, electrical service, natural gas, telephone and radio services. Rooms include the supervisor's office, crew room, two rest rooms and one shower stall. The structure is built on perimeter concrete footings with concrete slab-on-grade floors, and is comprised of ieinforced concrete cinder block siding and hot-mopped built up asphalt/rock flat-topped roofing. The interior walls and exterior southern wall are wood-framed and sheet-rocked or plastered. The ceilings are wood-framed with plywood sheeting or sheet-rock material. The office is located on the eastern end of a four-bay equipment building. Metal siding and fascia work is visible on exterior portions of the building. A pad-mounted electrical transformer is located behind the northern wal of the office. A radio transmitter/receiver tower is located east of the office. Equipment Building. The concrete cinder block sided and wood-framed equipment building was constructed in 1970 with the adjoining office. The building includes all of the utilities as indicated for the office. The equipment building is the central location for the electrical, telephone and natural gas service mains for the Site. Rooms include the combined maintenance and personnel training room, lunchroom, tool rooms, and maintenance vehicle equipment storage. The structure is built on a Project No.S8225-06-146 - 1 - May 25,2001 I