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7.A. - Page 33 The przmary sources of noise from the project will be temporary construction noise and operational noise. Construction noise is largely a function of the construction equipment used, the location and sensitivity of nearby land uses, and the timing and duration of the noise-generating activities. Construction noise levels will vary depending on construction phase, equipment type and duration of use, distance between noise source and receptor, and presence or absence of barriers between noise source and receptor. All noise-generating construction activities are anticipated to be conducted on weekdays between the hours of 7: 00 A.M. and 8: 00 P.M. in accordance with City requirements. Because the project will not contain arry residences, the project is not subject to DTPP EIR Mitigations 11-1 and 11- 2. However, the project will be exposed to noise levels of between 65 and 75 decibels (DTPP EIR, Figure 11.3, 2030 Traffic and Caltrain Noise Levels With the DPP, p. 11-21). For new commercial (office professional/technology) buildings subject to noise levels of 65 or more decibels, the Redwood City Noise Guidelines for Land Use Planning state, "New development should be undertaken only after detailed analysis of noise reduction requirements [isJ made. " This standard protocol shall be required as a condition of approval for the project, subject to City review and approval, and will ensure that the potential noise impacts on the project will be less than significant. The proposed amendments will not introduce arry new land uses that have a potential to generate noise or be the receptor of noise beyond those previously identified and analyzed in the DTPP EIR; consequently not further analysis is required. c. The DTPP EIR (p. 11-29) concluded that noise levels from DTPP development would increase primarily due to new traffic patterns, new commercial development next to or below residential development, and site-specific sources such as mechanical equipment. Traffic noise increases resulting from DTPP development are projected to be from less than 1 dB to up to 2 dB; these increases are considered less than significant because they are imperceptible to the average human ear within the existing Downtown environment. (EIR pp. 11-19, 11-29, and 11-30) Other sources of noise (e.g., mechanical equipment) are subject to the City ofRedwood City Noise Ordinance regulations. Therefore, permanent increases in noise levels resulting from the proposed amendments and project are considered less than significant. d. The DTPP EIR (pp. 11-23 through 11-29) concluded that potentially significant temporary noise and vibration impacts could be generated by demolition and construction activities in the DTPP area. Mitigations 11-3 and 11-4 would reduce these impacts to less-than-significant levels through scheduling, monitoring, and other measures. Furthermore, construction of the proposed project will be required to comply with the City of Redwood City Noise Ordinance and all applicable City codes and regulations for noise control. In addition, required implementation of a construction traffic plan (including the identification of truck haul routes) approved by the City will help minimize construction-related impacts to adjacent land uses. These measures, which shall be required as conditions of approval for the project, will reduce the temporary construction noise impacts of the project to a less-than- significant level. The proposed amendments would not result in arry new land uses that were not previously identified and analyzed in the DTPP EIR; consequently no further analysis would be required. e. & f. The DTPP area is located within two miles of San Carlos Airport, but is outside the projected SSdB CNEL contour shown in the Redwood City General Plan and the San Mateo County Comprehensive Airport Land Use Plan. Therefore, no significant impacts were identified in the DTPP, and no additional noise mitigation was required (EIR p. 11-30). The proposed project is in compliance with all applicable DTPP regulations, and as a result, no additional impacts are anticipated. The proposed amendments would not result in arry new land uses that were not previously identified and analyzed in the DTPP EIR; consequently no further analysis would be required. 24