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Mountain House Specific Plan III ........................................................................................................................................................................ 11.2.3 Implementation Measures a. On school sites and other noise-sensitive land uses,any outdoor instructional areas or areas which L require speech audibility will be located outside or shielded from the 60 dB Ldn noise contour. b. Noise levels in primary outdoor use areas of new residential development shall not exceed an Ldn of 60 dB unless the project design includes reasonable mitigation measures to reduce noise in outdoor activity areas to as close to an Ldn of 60 dB as possible. Where it is not possible to reduce noise in L outdoor activity areas to an Ldn of 60 dB or less using practical application of the best available noise reduction measures,an exterior noise level of up to an Ldn of 65 dB may be allowed. Under no circumstances will interior noise levels exceed an Ldn of 45 dB. Compliance shall be verified prior to the issuance of building permits. bw c. All implementing projects shall comply with the applicable noise provisions of Specific Plan 111 and the San Joaquin County Development Title. d. A noise study shall be prepared for all noise sensitive areas where the exterior noise level is predicted to exceed 60 dB Ldn and shall identify specific noise-reducing barriers, taking into account the final design and grading of the subdivision, sufficient to meet the needed mitigation for noise generated from arterial roadways. The applicant shall submit the noise study to the Community Development Department prior to approval of Development Permits. e. The applicant shall provide a disclosure by deed notice that property within the Byron Airport overflight zone is located in an area that maybe subject to aircraft flyover noise. The following shall be noted on the Final Map: "The deed of each lot shall contain a recording notification that Village X (A/B or D as i appropriate)lies within Byron Airport's potential aircraft noise impact area, defined as Zone • D of the Contra Costa Airport Land Use Compatibility Plan, Compatibility Map(Figure 4B)." 11.3 STATIONARY SOURCE NOISE IMPACTS 11.3.1 Master Plan Summary To control stationary noise sources(such as industrial, commercial, or utilities that create a constant or r periodic noise in a fixed location),the Master Plan requires that daytime and night-time hourly Leq standard will be used to evaluate stationary noise sources at receiving residential land uses. To provide noise level standards that account for stationary noise sources, new development of noise sensitive uses will not be allowed where the noise levels due to stationary noise sources will exceed the community's noise level standards set forth in the Master Plan. Draft 02/09/05 11 -7 ..........................................................................................................................................................................