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ENVIRONMENTAL IMPACT REPORTADDENDUM <br />Bristol Street Widening Phase 1118 — Washington Avenue to 17`" Street <br />1.0 INTRODUCTION <br />This Addendum has been prepared in accordance with the California Environmental Quality Act (CEQA), <br />as amended, to evaluate the potential environmental impacts of the proposed changes to the widening of <br />Bristol Street, from Warner Avenue to Memory Lane as proposed in the Project Final Environmental <br />Impact Statement / Environmental Impact Report (FEIS/EIR) approved in 1990 (FHWA-CA- EIS- 89 -01- <br />F; SCH No. 87071509). <br />This Addendum focuses on the segment of Bristol Street between Washington Avenue and 176' Street <br />(Phase IIIB, or Project) and is limited to the proposed improvements to this segment. This Addendum <br />provides an assessment of potential environmental impacts associated with minor design modifications <br />and the issue of climate change which was not addressed in the previously prepared and certified <br />FEIS/EIR. <br />Design modifications to the Project, since approval of the 1990 FEIS /EIR, that are addressed in this <br />Addendum include the following: <br />• The proposed Project eliminates the dedicated eastbound right -turn lane and proposes a shared <br />right -turn lane in its place at the intersection of Bristol Street and 170' Street. <br />• The 1990 FEIS /EIR, using decommissioned noise methodology, recommended noise barriers <br />(soundwalls) at all easterly parcel boundaries currently fronting the east side of Bristol Street <br />between Civic Center Drive and 17d' Street. However, using current noise modeling methodology <br />(Noise Study Report, URS Corporation 20t2c), noise abatement in the form of noise barriers is <br />not required for the Phase IIIB Project. <br />• For purposes of aesthetic treatment and enhancement, the proposed Project would install an <br />approximately 8 -foot high block wall at approximately the same location where the soundwall <br />was previously recommended (as addressed in the 1990 FEIS/EIR). <br />Additionally, the topic of greenhouse gas (GHG) emissions was not addressed in the previously approved <br />1990 FEIS/EIR as this topic was not a subject matter that required evaluation pursuant to CEQA at that <br />time. As such, this Addendum analyzes the effects of GHG emissions associated with construction and <br />operation of the proposed Project. <br />This Addendum to the previously certified 1990 FEIS /EIR has been prepared because Project - related <br />modifications to the Bristol Street alignment do not trigger the need for further environmental analysis in <br />a Subsequent or Supplemental EIR under the requirements CEQA (refer to CEQA Guidelines Sections <br />15162 and 15163, respectively). <br />1.1 Purpose of an Addendum <br />Under CEQA, when an EIR has been certified for a project, no Subsequent EIR may be required for that <br />project unless the lead agency determines, based upon substantial evidence, that one or more specified <br />ANA 111 -334 (PER -02 -01) CITY OF SANTA ANA (11/25/2013 REV2) 132897 CM PAGE 1 <br />55B -8 <br />