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Phase I Environmental Site Assessment
<br /> Neighborhoods D,K,L,and Town Center,Mountain Douse,California
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<br /> (ASTM E 1527-00, §5.5) as recognized environmental conditions and historical recognized
<br /> i environmental conditions.
<br /> • The term recognized environmental condition means the presence, or likely presence, of hazardous
<br /> substances or petroleum products on a property under conditions that indicate an existing release, a
<br /> past release, or a material threat of a release of hazardous substances or petroleum products into
<br /> structures on the property or into the ground, groundwater, or surface water of the property. The term
<br /> is not intended to include de minimis conditions that generally do not present a material risk of harm
<br /> to public health or the environment and that generally would not be the subject of an enforcement
<br /> action if brought to the attention of appropriate governmental agencies. Conditions determined to be
<br /> de minimis are not recognized environmental conditions.
<br /> • The term historical recognized environmental condition means an environmental condition which in
<br /> the past would have been considered a recognized environmental condition, but which may or may
<br /> not be considered a recognized environmental condition currently.
<br /> The goal of this assessment is not to demonstrate that no hazardous materials are present at the Site. The
<br /> assessment is necessary, however, to complete "...all appropriate inquiry into,the previous ownership and
<br /> uses of the property consistent with good commercial or customary practice" [42 USC §9601 (35) (B)].
<br /> The use of an environmental professional in the performance of this assessment will minimize and
<br /> manage risk of environmental difficulty,but it cannot completely eliminate the risk.
<br /> t 1.2 SCOPE OF WORK
<br /> The typical scope of work for an ASTM Phase I ESA is described below. The results of the Phase I ESA
<br /> are used to determine the need for, and scope of, a Phase 11 ESA. When further environmental inquiry is
<br /> undertaken, a Phase U ESA typically includes environmental sampling and analysis. An ASTM Phase 11
<br /> ESA was not included in this scope of work, however, a Limited Phase 11 ESA was conducted separately
<br /> to investigate the possible presence of pesticides and herbicides in soils at the Site, (Limited Phase II
<br /> Environmental Assessment Report, Proposed Neihborhoods D K L and Town Center Mountain
<br /> House, San Joaquin County, California, dated November 30, 2004,by Condor).
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<br /> In addition, a partial response to the Mountain House: New Community Master Plan potential Site
<br /> I hazards includes Chapter Six, Potential Site Hazards, 6.8.1 Fuel Lines and Pipelines, Implementation (a
<br /> and b) and 6.8.4 Other Potential Hazards, Implementation (a, b, and c). Specific potential Site hazards
<br /> included are locations of existing fuel pipelines, abandoned fuel pipelines; gas exploration wells, and
<br /> other previously recorded sources of hazardous substances on and within 500 feet of the Site as indicated
<br /> i in the list that follows:
<br /> • Site assessment (within 500 feet) and mapping of fuel pipelines, including existing and
<br /> abandoned fuel lines(Master Plan, Chapter 6,Section 6.8.1, Page 6.14)
<br /> • Mapping of abandoned gas wells and other previously recorded sources of hazardous
<br /> rsubstances (within 500 feet) and investigation of appropriate gas well closure (Master Plan,
<br /> I Chapter 6,Section 6.8.4,Page 6.17)
<br /> Site Searches/Assessments in accordance with ASTM Standards (Master Plan, Chapter 6,
<br /> Section 6.8.4,Page 6.17)
<br /> f • Pesticide residue assessment(Master Plan, Chapter 6, Section 6.8.4,Page 6.17)
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<br /> il� CONDOR
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