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Phase f Environmental Site Assessment Neighborhoods D,K,L,and Town Center,Mountain House,California Page 23 off-site and applied by portable ASTs. Mr. Arnaudo indicated water from the river is pumped to fields further south. Copies of the Restricted Materials Permits and Pesticide Use Reports received from SJCACO are located in Appendix E. It must be noted that not all of the chemicals listed in Table I in Section 4.2.4 and Appendix E of this report may have been applied to the Site properties. The pesticide residue assessments are documented in the separate Neighborhoods D, K, and L and Town Center Phase II ESA, dated November 30, 2004 prepared by Condor. The results of this testing showed no detectable pesticide or herbicide residue in the samples at or above the laboratory detection limits for Neighborhood K. However, low concentrations of DDT and DDE were indicated in the farm complexes E area located in Neighborhoods D and L in the agricultural.fields of Neighborhood L. Additionally, an elevated concentration (associated with a cancer risk greater than the one-in-a-million cancer risk screening level) of toxaphene was indicated in the former farm complex (construction headquarters area) area of Town Center. 7.6 ASSESSMENT OF PCB TRANSFORMERS (MASTER PLAN, CHAPTER 6, SECTION 6.9, PAGE 6.20) Electrical transformers can contain PCBs, highly toxic compounds whose manufacture was discontinued in the United States in 1976. During the site reconnaissance on November 12 and 15, 2004, four observed transformers (two old ones were.observed stored in the northwestern portion of the small farm complex in Neighborhood D, one in Neighborhood K, and one in Neighborhood L) were not labeled as non-PCB containing. A general PG&E response for information on an adjacent site is included in Appendix G. 8.0 FINDINGS The Site consists of approximately 1,195 acres that are fallow, being used for agricultural purposes, and/or being used to facilitate construction and development of the town of Mountain House and Mountain House Creek. Several portable storage tanks with secondary containment containing fuel for the pump generators were observed along the western side of Mountain House Creek. A 55-gallon drum was observed in the western portion of the construction headquarters area on Town Center. Five-gallon buckets were noted throughout the construction headquarters area: for temporary q p ary stora ge. Interviews indicated an AST was located behind an old outbuilding in the northwestern portion of Town Center_. Agricultural chemicals have been applied to the Site properties. Several small piles of concrete debris and small amounts of old household items were noted in varying portions of the Site. An old house had existed in Neighborhood L and a house and old outbuildings had existed in Town Center. According to interviews, some asbestos wasro erl removed and the buildings P P Y g were hauled away. The septic systems and wells were also properly removed and/or abandoned. Historical s oncal information and site reconnaissance revealed two houses, outbuildings, propane tanks and two wells in Neighborhood D. Due to age, asbestos and/or leadma roducts be contained in the old P Y outbuildings. Several old 55-gallon drums were observed inside, west of, and northwest of the'barn on Neighborhood D. A small bin of old tires is located in the northwestern portion of the small farm complex on Neighborhood D.'A mixed pile of brush and old household items is located along the southern boundary and an abandoned car is located in the northern portion of Neighborhood D. An abandoned car is located in the central portion of Town Center. An old fuel tank and an old outbuilding were observed in the southeastem.comer of Neighborhood L. Large piles of soil and some with asphalt debris are located in the is CONDOR