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1 [CONTACT PERSON: Mr. George Ross A & K Railroad Materials, Inc. Post Office Box 30076 Salt Lake City, UT 84130 2.2 Map Showing Site Location Relative to Nearby Landmarks: The site location is shown on Figure 1. i 2.3 Layout of All Underground Tank and Piping Systems Properly Labeled for Content: The area of the former tanks, lines, and pumps are shown on Figure 2. 2.4 Laboratory Results for Initial Soil Sampling. i4 Analytical results are summarized in Table 1. Laboratory data sheets are resented in Appendix Y rY P PPe 2.5 Estimates of Liquid Quantity and Composition Leaked: The lack of detection of significant hydrocarbon contamination in soils beneath the tanks suggest that contaminants in the excavated material were derived from overspilla V_ No holes were noted in either tank or in the associated piping during removal. The constituents detected in the = soil samples collected from the excavated materials are typically derived from gasoline. 2.6 Topography, Geology, Hydrology: The site is situated on level terrain comprised of Quaternary Alluvial sediments. Near-surface sediments consist of intercalated sands, silts, clays, and gravels. 1 As is typical of alluvial environments, high permeability zones representing former stream channels may occur as sinuous or lenticular features. Natural groundwater`gradients-often roughly parallel surface drainage.trends. Thus,itht a regional7groundwater gradient is to the west toward the b .significant pump ng-depression ron`tlie'east side of however, has; strongly influenced-1ona1 gradients and-has inmany cases reversed the natural flow diiection. �T�he water tableat the site lies,approximately_90-feet.below grade and flows to the northeast based no San Joaquin Flood'Control and'Water Conservation District data (Fa11y1990 Surface AKRRI203JPL 2