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Ponderosa Homes at 6900 Valley Trails Drive Initial Study and Negative Declaration ENVIRONMENTAL SETTING The project site is urbanized and is not known to contain any mineral resources. DISCUSSION a-b) The project site is not known to contain any mineral resources and thus would not result in the loss of locally important mineral resources. Therefore, there would be no impact. 5.12. NOISE Less Than Significant Potentially Impact With Less Than Significant Mitigation Significant No Issues Impact Incorporated Impact Impact Would the project: a) Exposure of persons to or generation of noise levels in X excess of standards established in the local general plan or noise ordinance, or applicable standards of other agencies? b) Exposure of persons to or generation of excessive X ground borne vibration or ground borne noise levels? c) A substantial permanent increase in ambient noise X levels in the project vicinity above levels existing without the project? d) A substantial temporary or periodic increase in X ambient noise levels in the project vicinity above levels existing without the project? e) For a project located within an airport land use plan X or, where such a plan has not been adopted, within two miles of a public airport or public use airport, would the project expose people residing or working in the project area to excessive noise levels? f) For a project within the vicinity of a private airstrip, X would the project expose people residing or working in the project area to excessive noise levels? ENVIRONMENTAL SETTING External noise sources in the vicinity of the project site are primarily generated by vehicles traveling on 1-680, which is located 700 to 1,200 feet west of the project site. Noise measurements taken for the General Plan in 2007, directly west of the project 34