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Phase I Environmental Site Assessment Neighborhoods D,K,L,and Town Center,Mountain House,California Page 3 • Assessment of PCB transformers(Master Plan, Chapter 6,Section 69,Page 6.20) t� a Canals(within V2-mile) (Master Plan, Chapter 6, Section 6.8.4,Page 6.18) Gas line relocation plan(Specific Plan 1,Section 6.6.2) 1.2.1 Site Reconnaissance Condor conducted a Site reconnaissance and prepared a general description.of the Site. Observations were made on the Site, along the periphery of the Site, and in areas common to the Site and adjacent properties to assess if conditions suggest that hazardous substances are present on, or might migrate to, the Site. Obvious terrain characteristics of concern, such as areas of distressed vegetation, ground stains, Iandfills, depressions,and/or evidence of any above-grade and below-grade tanks,were also noted. 1.12 Historical Information Historical information pertaining to the Site was reviewed to learn about permits granted or citations issued (including well and/or underground storage tank permits), prior usesof the Site and properties immediately adjacent to the Site, and local geologic and hydrogeological data, as appropriate. Topographic maps and reasonably obtainable historical aerial photos were reviewed to assess historical land uses on and.near the Site. Sanborn .Fire Insurance Maps were not available for the Site and surrounding areas. Additional research includes locations of existing fuel pipelines, abandoned fuel pipelines, gas exploration wells, and other previously recorded sources of hazardous substances on and within 500 feet of the project area Master Plan Chapter Six Sections 6.8.1 Fuel Lines and Pipelines, Implementation a and b and 6.8.4 Other Potential,Hazards, Implementation a,b, and c). 1.2.3 Review of Environmental Records The non-confidential portions of reasonably obtainable and practically reviewable records retained by Federal, State, and local agencies for properties in the vicinity of the Site within an approximate minimum search distance that have been investigated and/or inspected by these agencies were reviewed for potential environmental'liability.The records review is included in the EDR report, Appendix C. 1.2.4 Evaluation and Report Preparation A written report of the findings of the assessment (this report) was prepared upon completion of the investigation. The g report includes information to support the conclusions reached by Condor that relate to the environmental condition of the Site and to potential environmental liability, if discovered during the assessment. I� 1.3 SIGNIFICANT ASSUMPTIONS 1.31 ASTM Assumptions . ASTM 3.3.27 Practically reviewable — Information that is practically reviewable means that the information is provided by the source in a manner and form that, upon examination, yields information relevant:to the property without the need for extraordinary analysis of irrelevant data. The form of the . information shall be such that the user can review the records fora limited geographic area. Records that cannot be feasibly retrieved by reference to the location of the property or a geographic area in which the property is located are not generally practically reviewable. Most databases of public records are ! practically reviewable if they can be obtained from the source agency by the county, city, zip code, or other geographic area of the facilities listed in the record system. Records that are sorted, filed, organized, or maintained by the source agency only chronologically are not generally practically reviewable. i �1� CONDOR