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5.1 Distance to production wells for municipal, domestic, agriculture, industry and other uses within 2,000 feet of the site. ATC reviewed copies of well permits at the SJCPHS-EHD on June 13, 2002. ATC identified one additional well in the SJCPHS-EHD records that was permitted within the 2,000-foot radius. Field �- observations on June 13, 2002 identified two additional agricultural wells in the vineyard to the south and west of the site. Permits for these wells were not identified in the files of the SJCPHS- EHD. It is likely that these wells are permitted through a nearby property address that is outside of the 2,000-foot site radius. A prior report by Environmental Science & Engineering, Inc. (ESE) dated November 1990, reviewed well locations in the vicinity of the site at the California Department of Water Resources. This study indicated that two wells were located at the site and L" that four additional wells were located within one-half mile of the site at that time. Of the six groundwater wells identified within 2,000 feet of the site boundaries, three are domestic wells and Lo three are irrigation wells. The locations of these wells and distances from the site are reported in Table 9. One well, identified as a domestic well on the SWRCB GeoTracker computer database is located approximately 630 feet north of the site. This corresponds to the Mainland Nursery well identified in SJCPHS-EHD records. Field observation confirmed that this well belongs to Mainland Nursery. LW Two wells on the AT&T site are located approximately 130 feet north and 160 feet east of the former UST. Well permitting obtained from the PHSSJC-EHD indicted that the two on-site wells +•• (AT&T-1 and AT&T-2) were constructed in 1957 and 1966, respectively. The two AT&T wells provide water to the site for cooling of equipment and for drinking water. One tap water sample collected from within the AT&T building on August 24, 1999 was tested for diesel fuel and was found to have no detected concentrations. Therefore, diesel fuel does not appear to have migrated to deeper aquifers to impact water accessed by these wells. 5.2 Site maps, to scale, of area impacted showing locations of former and existing tank systems, excavation contours and sample locations, boring and monitoring well elevations contours, gradients, and nearby surface waters, buildings, streets, and subsurface utilities. The following figures are provided in this report: Figure 1 —Site Vicinity Map(USGS Topographic Map) • Figure 2—Site Location Map • Figure 3 —UST Excavation and Sampling Map �.. • Figure 4—Soil Boring Location Map-Soil Contamination • Figure 5— Soil Boring Location Map-Groundwater Contamination • Figure 6— Soil Cross Section Map UP • Figure 7—Groundwater Contour Map 10101 ATC Associates Inc. fi Project No.53.75128 0001 `e