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Alternatively, "Helicopter use shall not be permitted within 500 feet of the newest residential dwelling along the western site boundary." Mitigation Measure M4.144 The following Implementation should be added under Objective 5,Mobile Source Noise Control(Noise) (Appendix C): "b) In the airport overflight zone,the applicant shall provide a disclosure to potential home buyers that property offered for sale is located in an area subject to aircraft flyover noise." Mountain House Master Plan and Specific Plan I Mitigation Monitoring Program The County should use noise policies contained in the Noise Element of the General Plan to evaluate potential noise impacts associated with proposed projects. Projects to be located in areas showing large noise increases should require noise studies to quantify the project contribution to the future noise environment. If the noise impacts associated with a specific project are found to be significant,mitigation measures should be proposed to reduce the impact.New,more restrictive noise and land use compatibility criteria for all proposed land uses should be adopted by the County to match criteria of the State of California. College Park at Mountain House Specific Plan 111 2004 Policy 11.2 Mobile-Source Noise _ a. On school sites and other noise-sensitive land uses, any outdoor instructional areas or areas which require speech audibility will be located outside or shielded from the 60 dB L&noise contour or shielded from mobile noise in excess of 60 dB Ly,. b. Noise levels in primary outdoor use areas of new residential development shall not exceed an L"of 60 dB unless the project design includes reasonable mitigation measures to reduce noise in outdoor activity areas to as close to an L&of 60 dB as possible.Where it is not possible to reduce noise in 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 Ld.of 45 dB. Compliance shall be verified prior to the issuance of building permits. c. All implementing projects shall comply with the applicable noise provisions of Specific Plan III 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 L&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 may be 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 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)" College Park at Mountain House Specific Plan III Draft EIR EDAW San Joaquin County 4.13-13 Noise