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LIVE OAK BEO ENVIRONMENTAL Surface& Subsurface Contamination Report— The Arbor Mobile Home Perk, Acampe June 30, 2008 1'3.2 Topographic Map A recent U.S. Geological Survey 7.5-minute topographic map was obtained from the San Joaquin County District Viewer. In the map, the Site is depicted as a mobile home park. The property is depicted approximately 60 feet above mean sea level in an area with a slight grade down to the west. Surrounding properties are primarily vineyards and rural residences,with a few commercial or industrial structures along Highway 99. This map is included in Appendix 3. / 4.0 SITE INSPECTION Abigail Racco of LOGE inspected the site on June 17, 2009. Photographs of the Site are attached to this report as Appendix 2. The site inspection was limited by structures, pavement, and vegetation obscuring the ground surface. No inspection of individual mobile home spaces was conducted besides viewing the units from the roadways. The Site consists of a mobile home park with a clubhouse, swimming pool, stormwater retention pond, sewage treatment and disposal area, and water treatment system. Minor oil staining to the asphalt parking spaces was observed throughout the park. No other staining was observed. One water well located on the north side of the parcel supplies the entire park, after the water is run through carbon filters at the treatment system. The well and water treatment areas appeared clean and well maintained. A destroyed well is located near the current well. A second destroyed well was observed on the east side of the Site. The septic treatment and disposal area appeared clean and dry. A small storage area was observed nearby; several buckets of paint and a reportedly empty drum were on the ground outside of a small structure. The stormwater retention pond was also dry; the north portion of the pond was heavily wooded and inaccessible. A tanker truck was observed parked adjacent to the stormwater pond. Two reportedly empty drums were observed beside the truck. Two groundwater monitoring wells were observed on the south side of the Site, and a third was observed on the adjacent property to the south. These wells appear to be for the purpose of monitoring any impacts to groundwater from the park septic system. Six pole-mounted transformers and seven pad-mounted transformers were observed within the park. No stickers indicating that the transformers are free of polychlorinated biphenyls (PCBs) were observed. The transformers did not appear to be leaking,though one appeared quite old. Surrounding properties included agricultural, residential, and commercial/industrial land. To the north and east were vineyards. To the northwest was an apartment C1 complex and vacant field. To the west was the Highway 99 Frontage Road, followed by ' a storage business (Arbor Secure Storage) and an empty lot. To the southwest, across 3