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18. Increase Traffic Noise: Before occupancy of the first residence at College Park, a noise barrier shall be constructed by the College Park developers between the five existing residences located on the north side of Grant Line Road between Central Parkway and the Alameda County line (Receptor 14 in Figure 4.13-2 of the College Park Final EIR) and the northern travel lane of Grant Line Road. The noise barriers may consist of a wall, berm, or combination thereof. The exact location, height, and character of the noise barrier shall be determined by a noise consultant approved by the County. The sound barrier shall reduce outdoor noise levels at the center of the front yards of the five existing residences to below 65 dBA Ld,ICNEL. If Grant Line Road is widened at this location subsequent to construction of the sound barrier but before removal of the five residences under Specific Plan II, the sound barrier shall be relocated, as required. If the five existing residences are removed under Specific Plan ll before occupancy of the first residence under the College Park project, this mitigation measure shall not require implementation. This mitigation shall be funded through fair-share payments by the College Park developers. [MM 4.13-3] } Timing: Design submitted with Improvement Plans for first Final Map and compliance verified prior to the issuance of building permits. k 19. Outdoor Noise Levels: Best available noise reduction measures shall be implemented by the applicant to reduce noise levels in primary outdoor use areas (backyards) of new residential development to an Ldn of 60 dB. The subdivider shall specify what reasonable # measures have been taken in this regard. Where it is not possible to reduce noise levels to this level using practical application of the best available noise reduction measures, an exterior noise level of up to 65 db may be allowed. [Master Plan Policy 11.3.1 (e) and Specific Plan III Implementation Measure 11.2.3 (b).] In the case that noise levels cannot be reduced to the design noise level of 60 dB, the applicant must provide notice via a note on the deed of each lot stating that exterior noise levels may exceed 60 dB. Timing: Inclusion of note on the Final Map approved by CDD prior to Final Map approval, and inclusion of note on deed prior to issuance of building permits. 20. Interior Noise Levels: Inferior noise levels for housing proposed to be located in areas exposed to an exterior noise level of an Ldn above 60 dB shall be maintained at or below an Ldn of 45 dB. [Implementation Measure 11.2.1 (4)] Timing: Compliance verified prior to the issuance of building permits. 21. ConstrOction Noise: The following measure shall be implemented during construction: ■ Construction shall be limited to the hours of 6:00 AM to 9:00 PM on weekdays. Extended hours which may include Saturdays and Sundays may be allowed through prior notice to adjacent residents and landowners, and prior approval of the MHCSD for infrastructure construction and CDD for building permits. i • Comply with all San Joaquin County Development Title for all construction activities. • Equip all construction vehicles or equipment, fixed or mobile, with properly operating and maintained mufflers and acoustical shields or shrouds, in accordance with the manufacturers' recommendations. ■ Arrange all construction equipment and truck routes to minimize travel adjacent to occupied residences. ■ Locate stationary construction equipment and staging areas as far as possible from sensitive receptors. Temporary acoustic barriers may be installed around stationary equipment, if necessary. [Mitigation Measure 4.13-1 from Specific Plan III EIR] Timing: Inclusion of the above measures as notes on Improvement Plans approved by CDD and MHCSD prior to Final Map approval. 5