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Phase 1 Environmental Site Assessment Neighborhoods D.K,L,and Town Center,Mountain House,California Page 26 It is Condor's opinion the service station on the southwest corner of Mountain House Parkway and Byron Road constitutes an historical recognized environmental condition pursuant to the ASTM E 1527-00. An historic map (apparently Pacific Gas and Electric map from 1937 to 1944) includes a service station at that location. No evidence of the service station has been detected at this location, however, underground fuel storage is typically associated with service stations. It is Condor's opinion that the piles of debris and solid waste, the old tires, and the old electrical transformers constitute de minimis conditions pursuant to the AS Standard. The debris and solid waste, the old tires, and the old electrical transformers should be properly disposed of by taking them to the appropriate waste disposal facilities. It is Condor's opinion that the old outbuildings, wells, and possible PCB-containing electrical transformers constitute de minimis conditions pursuant to the ASTM Standard. The records for the electrical transformers should be researched, the old outbuildings properly disposed of, and the wells tested and/or properly abandoned to prevent them from becoming conduits for groundwater contamination. E All opinions expressed herein are based upon the evidence reviewed and the assumptions made during the assessment. The findings and results for the Partial Response of this report are as follows (the reference in the parentheses following each entry identifies the corresponding mitigation requirement): 1. Mapping of pipelines, including existing and abandoned fuel lines (Appendix A, Figure 5), has been completed. There are two active and one abandoned petroleum product pipelines within 500 feet of Neighborhood L and Town Center. There is one PG&E natural gas line transecting Town Center (see item 7 below). There is one abandoned petroleum product pipeline transecting Neighborhood D. In addition, there are several irrigation pipelines/waterways on the Site. Near surface irrigation pipelines and drains will be removed during Site grading. The deeper.agricultural drains will be abandoned in place (Master Plan, Chapter 6,Section 6.8.1,Page 6.14). 2. Mapping of abandoned gas .wells and investigation of appropriate closures has been completed. There is one plugged and abandoned dry-hole located within the northwestern portion of Neighborhood L (Appendix A, Figure 5). DOGGR records indicate that the well was plugged with cement to five feet bgs, the casing was cut, and a '/4-inch steel plate was welded on the top of the casing. No productive gas well is or has been located on or within - 500 feet of the Site. Previously recorded possible sources of hazardous substances are located on the Site (Appendix A. Figure 5). The pesticide storage areas include two areas in Neighborhood L; three areas in Town Center, and two areas in Neighborhood D. A possible former gas station was indicated in the northeastern comer of Town Center.ASTs were indicated in Neighborhood I and Town Center(it is possible that the suspected underground storage tank could have been an AST in Town Center). During the March 2004 reconnaissance and during the November 2004.site reconnaissance, no storage of agricultural chemicals was observed on � Neighborhood L. An AST was identified on APN 209-030-04 (Neighborhood L) during the March 2004 reconnaissance(Master Plan, Chapter 6,Section 6.8.4, Page 6.17). 3. Site Searches/Assessments in accordance with ASTM Standards were completed in the Phase �. I ESA of Neighborhoods D, K, and L and Town Center. The search radius was extended by �"', CONDOR