RES 00114A - Laserfiche WebLink

Mitigation Monitoring and Reporting Program L. Noise Page 78 NOISE Mitigatioo Measure: Lla(3). /jmitigations that would reduce exterior noise (eve(s m campy whh the adopted standard (ti0 dBJ carcnot jeasibfy be implo- mented: Require detailed project-specific noise studies for each development project in ea area where the standard is exceeded to characterize noise conditions and to ideality the noise reduction features that muss be incorporated to achieve acceptable interior noise levels, and require incorpo- ratios of those features into construction. Specifications ojthis measure also app/y to Mitigation Measures Llc(3) and Lld(3J Impact to be Mitigated: Proposed residential developmcn[ on the West Parcel north of the I-680 overcrossing of the Pleasanton Avenue extension would be exposed to a Ldn of greater than 60 dB. AgencyJlndividual Responsible for Developers of residential projects on the Wesl Parcel north of the I-680 Implemen[atioo: overcrossing of the Pleasanton Avenue extension Implementation Timing: Prior to construction Mitigatioo Specifications: To achieve exterior noise levels of 60 dB along I-680, the combination berm/wall along [he freeway would have to be increased to a height of more than 30 fee[.. At the Bernal/I-680 interchange, [he height of the soundwall would have to be increased [0 30+ feet [o achieve noise levels of 60 dB or less. Because provision of sound barriers of these heights is not possible, this mitigation measure is required. Construction specifications must demonstrate [ha[ interior noise levels will be reduced to no more than 45 dBA Ldn. AgencyQndividual Responsible [or Monitoring: CiTy of Pleasanton, Building Department Action by Monitor: (]) Verify that noise mitigation features are incorporated in building specifications. (2) Verify that noise mitigation features are built as specified. Monitoring Timing: (1) Prior to issuance of huilding permits. (2) Prior to issuance of certificates of occupancy. Monitor: Completion Date: Signature: