CORRESPONDENCE - 75A (COMMENT) - Laserfiche WebLink

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Chapter 4 Environmental Setting, Impacts, and Mitigation Measures such, the noise generated by construction activities for the proposed project could result in a temporary increase in ambient noise levels of over 5 dBA at uses adjacent to the project site. However, with implementation of mitigation measure MM4.8-1, the construction activities would only occur during the permitted hours designated in the City of Santa Ana Municipal Code Section 18-314(e), and thus would not occur during recognized sleep hours for residences or on days that residents are most sensitive to exterior noise (Sundays and federal holidays). As such, while the physical impact from an increase in ambient noise levels could occur from the construction activities associated with the proposed project, an adverse effect on the nearby residents would not occur. Implementation of mitigation measures MM4.8-2 through MM4.8-4 would also help reduce this impact. Therefore, with mitigation, this impact would be less than significant. Impact 4.8-6 Operation of the proposed project would not result in temporary or periodic increases in ambient noise levels. There would not be a substantial temporary or periodic increase and, thus, this impact would be less than significant. Operation of the proposed project would not include special events or temporary activities which would cause an increase in ambient noise levels. In addition, operation of the proposed project would not require periodic use of special stationary equipment that would expose off -site sensitive receptors to an increase in ambient noise levels above those existing without the proposed project. Therefore, there would be no temporary or periodic noise impacts to on- or off -site receptors due to operation of the proposed project. This impact would be less than sigtzi6cant. Threshold Would the project result in a substantial permanent increase in ambient noise levels in the project vicinity above levels existing without the project? Impact 4.8-7 Operation of the proposed project would not generate increased local traffic volumes that would cause a substantial permanent increase in ambient noise levels in the project vicinity. This is considered a less -than - significant impact. The increase in traffic resulting from implementation of the proposed project would increase the ambient noise levels at sensitive off -site locations in the project vicinity. Traffic was analyzed both for near -term project opening year (2030) and long range (2035) General Plan buildout conditions. Traffic analyzed as part of the 2030 traffic analysis was derived from existing traffic, an ambient growth factor of 0.5 percent per year and the traffic that is anticipated to occur based on known development projects within the vicinity of the study area that will contribute some (or all) of their traffic to the various study area roadways and intersections. Traffic analyzed as part of the 2035 traffic analysis was obtained from the OCTA Traffic Demand model. Previous analysis was conducted by using OCTAM 3.2 travel demand forecasting model. KOA conducted screenline analysis for OCTA's later version model OCTAM 3.3. The screenline analysis surrounding the City indicates that OCTAM 3.3 represents about 11 percent higher traffic volumes forecasting for both the AM and PM peak hour models. KOA therefore applied an 11 percent growth factor to the original OCTAM 3.2 traffic volume forecast. The growth in housing, population, and employment included in the OCP-2004 demographic projections is consistent with the 4.8-26 City of Santa Ana Transit Zoning Code (SD 84A and SD 84B) EIR