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Proposal to Prepare an EIR and Provide Planning Consulting Services for the First and Fourth Street Corridors Mixed -Use Overlay Zone Existing 24-hour noise levels will be calculated for various roadway segments in the project vicinity using the Federal Highway Administration Highway Noise Prediction Model (FHWA-RD-77-108) and current traffic counts from the traffic study prepared for the project. The model would calculate the average noise level at specific locations based on traffic volumes, average speeds, roadway geometry, and site environmental conditions. Vehicle nose energy rates in the FWHA model will be modified to incorporate rates utilized by Caltrans, which better represent vehicle noise levels in California. After the existing noise (and vibration) environment is described, relevant State and local noise standards and guidelines—including those established in Article 6 (Chapter 18) Noise Control—will also be summarized. Potentially vulnerable existing noise -sensitive land uses in the project vicinity (e.g., residences) will be identified. In consultation with City staff, EIP will develop significance criteria that are consistent with City - recommended impact thresholds, including those included in the City's Noise Control section. EIP will document the methods used to analyze noise impacts and will incorporate relevant modeling output into a report appendix. Project Analysis EIP will evaluate potential noise (and vibration) impacts caused by the no -project versus with -project mobile noise conditions. In addition, stationary noise impacts (caused by temporary on-site construction activities) will be evaluated, as well as operational noise impacts (caused by car alarms, horns, starter motors, deliveries, etc). Noise levels generated during construction will be estimated based upon anticipated construction schedules, techniques, and building types. The potential for construction noise to impact nearby noise - sensitive land uses—both existing uses and project uses—would be characterized by quantifying anticipated noise levels (e.g., based on distance). In particular, truck noise due to construction -related trips to the project site will be analyzed. Furthermore, vibration impacts from project -related construction activities will also be evaluated. EIP will estimate future (operational) noise levels at the locations of noise -sensitive project land uses, including those that would be most exposed to noise from the proposed project. Within the context of the pre -project noise environment in the project vicinity, EIP will evaluate whether any on-site operational noise sources have the potential to substantially affect off-site noise -sensitive land uses (in particular those of the residential neighborhood north of one of the project sites). Such sources might include stationary mechanical equipment, delivery and refuse truck activities, and site maintenance/cleaning activities. The analysis of project operational and cumulative noise impacts will address future noise levels at the project site and at sensitive uses in the project vicinity. Future noise levels at the project site will be calculated for the roadways within and around the site. The noise levels at various locations at the site will be compared to City standards to ensure that the proposed land uses are planned and located appropriately from a noise perspective. Future noise levels along the roadway segments in the project vicinity will be calculated to determine whether traffic generated by the project causes a substantial increase in noise at off-site locations. The potential for other operational impacts would be described qualitatively. Traffic noise levels will be analyzed forall scenarios to be considered in the Transportation and Circulation analysis, including: 12