Appendix A Noise Study Report - Laserfiche WebLink

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Summary ............ exceeding the NAC. Six noise barriers were evaluated. The results of the noise barrier modeling are shown in Table B.1 in Appendix B. All six noise barriers were capable of reducing noise levels by 5 dBA or more, as required to be considered feasible. A Noise Abatement Decision Report (NADR) will be prepared for the proposed Project. The NADR is a design responsibility and is prepared to compile information from the Noise Study Report (NSR), other relevant environmental studies, and design considerations into a single, comprehensive document before public review of the proposed Project. The NADR is prepared after completion of the NSR and prior to publication of the draft environmental document. The NADR includes noise abatement construction cost estimates that have been prepared and signed by the project engineer based on site -specific conditions. Construction cost estimates are compared to reasonable allowances in the NADR to identify which noise barrier configurations are reasonable from a cost perspective. The reasonableness determination of the feasible noise barriers shown in Tables 7.1 through 7.6 will be reported in the NADR for the proposed Project. The design of noise barriers presented in this report is preliminary and has been conducted at a level appropriate for environmental review and not for final design of the proposed Project. If pertinent parameters change substantially during the final project design, preliminary noise barrier designs may be modified or eliminated from the final project. A final decision on the construction of the noise abatement will be made upon completion of the public involvement process during the final project design process. The closest residences are located approximately 50 ft from the project construction areas. Therefore, the closest residences may be subject to short-term noise reaching 88 dBA maximum instantaneous noise level (Lmax) or higher generated by construction activities in the project area. Compliance with the Caltrans Standard Specifications, Section 14-8.02, and the City's Municipal Code, Section 18-314, will be required to minimize construction noise impacts on land uses adjacent to the project area. In compliance with these regulations, the contractor shall not perform any construction activities between the hours of 8:00 p.m. and 7:00 a.m. on weekdays and Saturdays, or at any time on Sundays and federal holidays. Fairview Street Improvements from 9th Street to 16th Street iii and Bridge Replacement Project Noise Study Report