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'`.. MouNTARI HOUSE PROPosED MACHADo TENTATIVE MAP 4. ENvmoNMENrAL CHECKLIST <br /> 4.11 Noisis <br /> 0 <br /> Less Than <br /> Potential SPIIIEIR Significant <br /> Significant Requires Impact Due New New <br /> Impact Additional to Mitigation Additional Additional <br /> .�, Less Than Adequately Review:No Measures in Impact Not Mitigation <br /> Significant Addressed in Significant Project Addressed in Measures <br /> Issue or No Impact SP1nEIR Impact Description SPIIIEIR Required <br /> 11. NOISE. Would the project result in: <br /> .�, a) Exposure of persons to or generation ■ __ <br /> of noise levels in excess of standards 11 E 11 <br /> established in the local general plan <br /> or noise ordinance,or applicable <br /> standards of other agencies? <br /> b) Exposure of persons to or generation ■ ❑ ❑ ❑ U <br /> of excessive ground home vibration <br /> or ground be me noise levels? <br /> `r c) A substantial permanent increase in ■ <br /> ambient noise levels in the project <br /> vicinity above levels existing <br /> without the project? <br /> d) A substantial temporary or periodic ■ <br /> `' increase in ambient noise levels in <br /> the project vicinity above levels <br /> existing without the project? <br /> e) For a project located within an ■ ❑ ❑ ❑ ❑ <br /> airport land use plan or,where such <br /> a plan has not been adopted,within <br /> two miles of a public airport or <br /> public use airport,would the project <br /> expose people residing or working <br /> in the project area to excessive noise <br /> '�. levels? <br /> f) For a project within the vicinity of a . ❑ 11 ❑ 11 <br /> private airstrip,would the project <br /> a. expose people residing or working <br /> in the project area to excessive noise <br /> levels?' <br /> SETTING <br /> ` The proposed project abuts Mountain House Parkway on the east side of the project site and <br /> Grant Line Road on the north side of the site. The center of the site is approximately 4,000 <br /> *AW feet north of Interstate 205 (1-205). The primary current source of noise at the project site is <br /> `r traffic from Grant Line Road,Mountain House Parkway and I-205. Construction of <br /> Mountain House Community neighborhoods to the north and agricultural activities to the east <br /> of Mountain House Parkway also contributes to the existing background noise levels. The <br /> %W project site,located approximately 5 miles southeast of the Byron Airport in Contra Costa <br /> `r County, is also influenced by aircraft fly-over noise. According to the MEM,portions of <br /> Neighborhood B,in which the project site is located, fall within the noise impact area of the <br /> airport. <br /> 11111106 <br /> 4-55 <br />