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HARBOR BLVD. MIXED USE TRANSIT CORRIDOR PLAN FINAL FIR <br />CITY OF SANTA ANA <br />5. Environmental Analysis <br />AIR QUALITY <br />Table 5.2 -8 Construction Regional Emissions <br />Construction Phase' <br />Construction - Related R ional Emissions ( undsida ) <br />VOC <br />NO, <br />CO <br />S02 <br />PMin <br />PM,., <br />Demolition <br />7 <br />57 <br />37 <br /><1 <br />6 <br />3 <br />Site Preparation <br />6 <br />49 <br />30 <br /><1 <br />10 <br />7 <br />Grading <br />8 <br />62 <br />36 <br /><1 <br />7 <br />4 <br />Building Construction <br />33 <br />145 <br />283 <br />1 <br />59 <br />9 <br />Paving <br />4 <br />27 <br />17 <br /><1 <br />2 <br />2 <br />Architectural Coatings <br />177 <br />7 <br />41 <br /><1 <br />10 <br />1 <br />Worst -Case Day <br />234 <br />348 <br />444 <br />1 <br />94 <br />25 <br />SCAQMD Standard <br />75 <br />100 <br />550 <br />150 <br />150 <br />55 <br />Significant? <br />Yes <br />Yes <br />No <br />No <br />No <br />No <br />Source: Cal EEMod Version 2011.1.1. <br />Shown in pounds per day <br />' Construction equipment mix is based on CaIEEMod default construction mx. See Appendix C for a list of assumptions on emissions generated on a <br />worst -case day. <br />2 Grading includes compliance with SCAQMD Rule 403 fugitive dust control measures. Measures include requiring an application of water at least <br />twice per day to at least 80 percent of the unstabilized disturbed onsite surface areas, replacing disturbed ground cover quickly, and restricting <br />speeds on unpaved roads to less than 15 miles per hour. Modeling also assumes a VOC of 100 gtL for interior paints pursuant to SCAQMD Rule <br />1113. <br />Construction activities associated with the project could potentially exceed the SCAQMD regional thresholds <br />for VOC and NOx. The primary source of NOx emissions is construction equipment exhaust. NOx is a <br />precursor to the formation of both 03 and particulate matter (PM,o and PM25). VOC is produced by <br />equipment exhaust and off gas of architectural coatings and paving. VOC is a precursor to the formation of <br />03. Project related emissions of VOC and NOx would contribute to the 03, NO2, PM,o, and PM2 5 <br />nonattamment designations of the SoCAB. Therefore, project related construction activities would result in <br />significant regional air quality impacts. <br />Impact 5.2 -2: Long -term criteria air pollutant emissions associated with the Harbor Boulevard Mixed Use <br />Transit Corridor Plan would exceed the South Coast Air Quality Management District's VOC, <br />CO, MR, and PM2.5 regional significance thresholds and significantly contribute to the <br />particulate matter (PM,o and PM2.5), ozone (03), and nitrogen dioxide (NOO nonattainment <br />designations of the SoCAB. [Thresholds AQ -2 and AQ -3] <br />ImpactAnalysis: Buildout of the Harbor Boulevard Mixed Use Transit Corridor Plan would result in direct <br />and indirect criteria air pollutant emissions from transportation, energy (natural gas use), and area sources <br />(e.g., natural gas fireplaces, aerosols, landscaping equipment). Transportation sources of criteria air pollutant <br />emission are based on the traffic impact analysis conducted by IBI Group (Appendix H of this EIR). The <br />project would generate a net increase of 31,910 weekday average daily trips (ADT) (see Appendix H). The <br />results of the CaIEEMod modeling are included in Table 5.2 -9. <br />Page 5.2 -16 PlaceWorkr <br />