2014-069 - Final Environmental Impact Report No. 2014-01

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HARBOR BLVD. MIXED USE TRANSIT CORRIDOR PLAN FINAL FIR CITY OF SANTA ANA 5. Environmental Analysis AIR QUALITY Impact 5.2 -3 Mitigation Measures 2 -1 and 2 -2 applied for Impact 5.2 -1 would reduce the project's regional construction emissions and therefore also reduce the project's localized construction related criteria air pollutant emissions to the extent feasible. However, because existing sensitive receptors may be close to project related construction activities, construction emissions generated by individual project have the potential to exceed SCAMQD's LSTs. Impact 5.2 -3 would remain significant and unavoidable. Impact 5.2 -5 The proposed project would result in construction of up to 3,884 new residential units within the Harbor Boulevard Mixed Use Transit Corridor Plan boundaries at build out. The exact locations of new sensitive land uses are not known at this time, although residential uses would be allowed near existing onsite light industrial land uses in the interim period until these industrial sites transition into new land uses. In addition, residential uses would also be allowed near existing offsite light industrial land uses. Light industrial land uses with sources of toxic air contaminants have the potential to affect new sensitive land uses within the Harbor Boulevard Mixed Use Transit Corridor Plan. Adherence to Mitigation Measure 2 -10 would ensure that new residential land uses proximate to major sources of toxic air contaminants reduce risk by installing high - efficiency MERV filters to reduce indoor concentrations particulates (including diesel particulate matter, which comprises the majority of risk) below SCAQMD's threshold. With implementation of Mitigation Measure 2 -10, Impact 5.2 -5 would be less than significant. Impact 5.2 -6 Mitigation measures applied for Impact 5.2 -1 and Impact 5.2 -2 would reduce the project's regional construction related and operational phase criteria air pollutant emissions to the extent feasible. However, given the potential increase in growth and associated increase in criteria air pollutant emissions, the project would continue to be potentially inconsistent with the assumptions in the AQMP. Impact 5.2 -6 would remain significant and unavoidable. 5.2.9 References California Au Resources Board (CARB). 2013a, April 1. Area Designations Maps /State and National. http: //w ..a b.ca.gov /desig /adm /adm.hLrn. 2013b, June 4. Ambient Air Quality Standards. http: / /www b.ca.gov /research /a qs /a gs2.pdf. . 2013c. Air Pollution Data Monitoring Cards (2008, 2009, 2010, 2011, and 2012). http: //w .. arb. ca .gov /adam /topfour /topfourl.php. . 2013d, October 23. Proposed 2013 Amendments to Area Designations for State Ambient Air Quality Standards. http: //w ..arb.ca.gov /regact /2013 /areal3 /ar 13isor.pdf 2005, April. Air Quality and Land Use Handbook: A Community Health Perspective. Page 5.2 -28 PlaceWorkr