75A - One Broadway Plaza Addendum_4.20.2020_wAppendices

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ONE BROADWAY PLAZA PROJECT EIR ADDENDUM CITY OF SANTA ANA 5. Environmental Analysis Transportation section), the implementation of the Proposed Project would reduce vehicle trips to and from the Project Site compared to the Approved Project. Since the Proposed Project is converting previously approved office uses to residential uses, would not expand building floor area, and would result in a reduction of vehicle trips, the operation of the Proposed Project would not create a new significant impact or a substantial increase in the severity of previously identified effects that would require the preparation of a subsequent EIR. In fact, with the reduction in trips, noise impacts resulting from the Proposed Project would actually be reduced as compared to the Approved Project. The Certified EIR determined that the Approved Project may experience future traffic noise levels in excess of the City's noise threshold and identifies Mitigation Measure N-3 to lower impacts to a less than significant level. The Proposed Project's would not place residences on the groundfloor, and therefore, the on -site residential units would not be immediately adjacent to this noise source. The Proposed Project would not create a new significant impact or a substantial increase in the severity of previously identified effects that would require the preparation of a subsequent EIR. b) Generation of excessive groundborne vibration or groundborne noise levels? Less Than Significant Impact/No Changes or New Information Requiring Preparation of an EIR. The Certified EIR determined that land uses adjacent to the Project Site would experience temporary annoyance due to vibration from construction. The construction of the Proposed Project would occur within the building envelope of the Approved Project. As such, the construction of the Proposed Project would not increase vibration due to construction. Consistent with the analysis of the Approved Project, the Proposed Project would result in a less than significant impact. The Proposed Project would not create a new significant impact or a substantial increase in the severity of previously identified effects that would require the preparation of a subsequent EIR. c) For a project located within the vicinity of a private airstrip or an airport land use plan or, where such a plan has not been adopted, within two miles of a public airport or public use airport, would the project expose people residing or working in the project area to excessive noise levels? No Impact. Similar to the conditions evaluated in the Certified EIR, there are no public airports, public use airports or private airstrips in the Proposed Project Site vicinity. The Proposed Project would not expose people residing or working in the area to excessive levels of aircraft- or airport -related noise. The Proposed Project would not create a new significant impact or a substantial increase in the severity of previously identified effects. Overall, the Proposed Project would be consistent with the Approved Project as analyzed in the Certified EIR. The Proposed Project would not create a new significant impact or a substantial increase in the severity of previously identified effects. 5.13.3 Adopted Mitigation Measures Applicable to the Proposed Project The following mitigation measures have been carried through from the One Broadway Plaza EIR. These mitigation measures have been incorporated into MMRP for this Addendum. Any modifications to the Apri12020 Page 71