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PE. _tEPORT (June 20, 2003) LOCKEFORD ELEMENTARY SCHOOL EXPANSION 13.0 CONCLUSIONS AND RECOMMENDATIONS 13.1 SUMMARY AND CONCLUSIONS D.H. Winn Trucking Company currently uses all three parcels that comprise the Site as a commercial truck terminal for transporting gravel, asphalt, concrete, and brick (none of these materials are stored at the Site). Truck washing and maintenance activities are concentrated in and around the structure on the southern parcel; while the northern and western parcels, which are unpaved but covered with crushed rock, are primarily used for parking. On the northern parcel, a fence, garage, and trailer owned by the north-adjacent neighbor encroach onto the Site by approximately five feet. That north-adjacent property is the location of a residence and small vineyard. Previously, the southern parcel was used as a grain warehouse (apparently involving the current structure) as far back as the 1800s, a brick making facility, and a furniture-making facility involving sandblasting. The western parcel and the southern portion of the northern parcel were a railroad right-or-way. The right-of-way included the main railroad tracks and a spur line that served the structure on the southern parcel. A grain elevator was located on the northern side of the railroad tracks. So far as is known, the northern portion of the northern parcel has never been developed, except for being graded and covered with crushed rock for use as a parking area. In 1995, a spill of 105 gallons of diesel fuel at the southern parcel was reported to the County. In 1996, an underground storage tank (UST) for diesel fuel was removed from the southern parcel along with some moderately contaminated soil. In 1999, a County inspection found oil spilled on the pavement inside the northeast comer of the building as well as various administrative violations. A Phase I Environmental Site Assessment (ESA) in 2002 found no recognized environmental conditions at the Site except for the following: • probable areas of moderate soil contamination by petroleum hydrocarbons throughout the Site, especially near the former UST, existing aboveground storage tanks (ASTs), and maintenance areas; • a potential for soil contamination by metals, petroleum hydrocarbons, and polycyclic aromatic hydrocarbons (PAHs) along the area of the former rail line; • a potential for elevated levels of metals and hydrocarbons in the soil below the slab of the building; and • a potential for asbestos-containing materials, lead-based paint, and bricks with elevated metals content in the existing building. This PEA addresses the first three items listed above, but does not address the final item since if LUSD acquires the Site, LUSD intends to either remove the building or transfer the portion of the Site that includes the building to another party. Removal of the building would require proper handling to assure that hazardous materials do not remain on the Site. 13-1 URS CORPORATION PAPEA Lockeford\Report\Lockeford Report Rev.doc