CORRESPONDENCE - 75A (COMMENT) - Laserfiche WebLink

Home Browse Search

4.8 Noise project construction documents, which shall be reviewed by the City prior to issuance of a grading permit. MM4.8-4 Each project applicant shall require by contract specifications that heavily loaded trucks used during construction would be routed away from residential streets. Contract specfications shall be included in the proposed project construction documents, which shall be reviewed by the City prior to issuance of a grading permit. Implementation of mitigation measures MM4.8-1 through MM4.8-4 would ensure that impacts associated with construction -related noise would be minimized. Therefore, this impact would be less than significant Impact 4.8-2 Operation of the proposed project could expose noise -sensitive land uses to noise levels that exceed the standards established by the City of Santa Ana General Plan. This is considered a potentially significant impact. Implementation of mitigation measures MM4.8-5 through MM4.8-7 would reduce this impact to a less-than-signiitcantlevel. Sources of noise generated by implementation of the proposed project would include new stationary sources (such as rooftop heating, ventilation, and air conditioning [HVAC] systems for the residential and office uses). The proposed project would also introduce new activity and noise to the area as part of the development of a new mix of uses under the proposed project. As shown in Table 4.8-3 (Existing Noise Levels Within and Around the Transit Zoning Code (SD 84A and SD 84B) Area), noise monitoring in the project area indicates that existing noise levels on site currently exceed the 65 dBA "desirable maximum" noise standard for high density residential uses. Development of new residences in areas where existing noise levels are over 65 dBA could constitute a significant impact. As the noise levels monitored on -site exceed the 65 dBA thresholds, the project site would not meet acceptable noise levels for a residential use. It should be noted that some monitoring locations such as Santa Ana Street, east of Ross St., and the intersection of Main Street and Third Street, are located in institutional and commercial areas, respectively, and contain uses that typically do not qualify as sensitive receptors. Further, impacts related to substantial permanent increases in ambient noise levels that could potentially result with implementation of the proposed project are discussed below under Impact 4.8-8. The City of Santa Ana General Plan states that all residential uses should be protected with sound insulation over and above that provided by normal building construction when constructed in areas exposed to greater than 60 dBA CNEL. As such the following rrtigation measures shall be implemented to all residential development within the Transit Zoning Code (SD 84A and SD 8413) area where the existing noise levels exceed the 60 dBA CNEL standard established in the General Plan. MM4.8-5 lFhen residential uses would be located in areas with noise levels in excess of 60 dBA CNEL (either through conversion of uselstructure or new construction), the pr ject applicant shall provide noire barriers around private open space areas, includa'ng patios and balconies, as necessary. The height and density of the barriers shall be sufficient to reduce the exterior noise levels within private open space areas to a CNEL of 65 dBA or less. City of Santa Ana Transit Zoning Code (SD 84A and SD 84B) EIR 4.8-23