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and source affecting specific property.Where noise attenuation walls are required,height and yard restrictions for walls may be waived by the Director,as required for effective noise reduction. Mountain House Master Plan 1994 ► Walls and Fences(Section 4.2.7.Policy a,Figure 4.1).Community walls shall be located along all R/L, R/VL,and R/M uses abutting Arterial Streets, except for Central Parkway and other Arterial streets where homes are served by rear alleys or streets. ► Overall Mobile Noise Impacts—Noise-Sensitive Land Uses (Section 11.3.1.Policy d). Schools and other - noise-sensitive land uses shall be located outside the 60 dB Ldn noise contour or shielded from mobile noise in excess of 60 dB Ldn. ► Overall Mobile Noise Impacts—Residential Uses(Section 11.3.1,Policy a and Implementation fl.Noise levels in new outdoor residential areas shall not exceed 60 dB Ldn unless the design includes reasonable mitigation to reduce noise in outdoor activity areas to as close as 60 dB Ldn as possible.Where not possible, _ an exterior noise level of up to 65 dB Lm,may be allowed.Under no circumstances shall interior noise levels exceed 45 dB Ldn. Overall Mobile Noise Impacts—Noise Studies(Section 11.3.1 Implementation c).Additional noise studies and conditions may be required before approval of Development Permits if within noise-sensitive areas identified in this Master Plan(MEW)and/or Specific Plans. ► 1-205 Freeway—Interstate 205 Mitigation(Section 11.3.2,Implementation b).Noise mitigation for I-205 impacts shall be provided for noise-sensitive uses by one or more of the following methods: • Residential development shall be set back from the centerline of I-205 a sufficient distance to satisfy MHMP noise policies after the inclusion of sound mitigation improvements, such as berms, embankments,and landscaping. - • Earth berms shall be built between the noise source and the noise-impacted area. ► Arterial Roadways—Noise barriers(Section 11.3.3,Implementation a).Noise studies shall be required at the environmental review stage for development permits and shall identify specific noise-reducing barriers sufficient to meet the needed mitigation for noise generated from roadways. Byron Airport—Notice to Residential Property Owners(Section 11.3.5 Implementation b).For residential property located in the area of potential aircraft noise impact shown in Figure 11.1: Area of Potential Aircraft Noise Impact from Byron Airport(page 11.11 of the MHMP), a disclosure shall be - provided by deed notice that property is located in an area that may be subject to aircraft flyover noise. Agricultural Equipment—Community Edge(Section 11.3.6,Implementation a) In accordance with the noise studies prepared at the Development Permit stage(see Section 11.3.1: Overall Mobile Noise Impacts above),each Development Permit shall include provisions for the improvement and construction of edge treatments,including sound berms and/or noise walls as specified in Section 4.3,"Community Edges." ► Existing Residences(Section 11.3.7.Policy a).Outdoor use areas of existing residences shall be protected from excessive noise.Noise mitigation could include constructing noise walls along the roadways, soundproofing homes,or building barriers around yards to provide shielded outdoor spaces. ► Existing Residences(Section 11.3.7,Implementation a).The MHCSD shall develop a plan for mitigation noise impacts at existing residences along Grant Line Road in the new community of Mountain House. Each - EDAW College Park at Mountain House Specific Plan III Draft EIR - Noise 4.13-10 San Joaquin County