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The findings and results for the Partial Response to Mountain House Master Plan Chapter Six.as presented in 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 may 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 1/4-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. Aboveground storage tanks (ASTs) were indicated in Neighborhood L 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/Asscssments 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 one mile over ASTM guidelines in anticipation that it would be useful for other areas in the Mountain House project. Several properties were identified in the Environmental Data Resources, Inc. (EDR) search of available government records. Only one property had a relevant file and no recognized environmental conditions were identified in conjunction with this property (Master Plan, Chapter 6, Section 6.8.2,Page 6.14). 4. Pesticide and herbicide testing of soils was completed as part of the Limited Phase H ESA for Neighborhoods D, K, and L'and Town Center. The results of this testing showed detectable j pesticide or herbicide residue in the soil samples at or above the laboratory detection limits (Master Plan, Chapter 6, Section 6.8.4,Page 6.17). 5. Only three of the pole-mounted transformers observed on-Site were marked as non-PCB containing. However,no staining was observed on any of the transformers or on the soil beneath._ As of the time of this report, Condor has not received documentation regarding possible spills. (Master Plan, Chapter 6,Section 6.9,Page 6.20). 6. Safety of canals is a concern of Trimark and Byron-Bethany Irrigation. District (BBID). Two canals are located west of Neighborhood D. BBID posts signagc restricting canal access at points f of public access. Canal 120 is proposed to be plugged under Grant Line Road and the canal will t be removed from Neighborhood C. The segment of Canal 120 Iodated south of Grant Line Road will then be used as a reservoir with water supplied from Canal 155. The segment of Canal 155 - 1 i�l w CONDOR