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City of Santa Ana <br />Environmental Checklist <br />finishing emissions would include combustion exhaust emissions from onsite construction <br />equipment, haul truck trips, and worker commute trips, as well as fugitive off-gassing emissions <br />from the application of architectural coatings and asphalt paving. <br />Assumptions regarding construction phasing and equipment use were developed based on <br />information received from the project applicant. A complete listing of the construction equipment by <br />phase, construction phase duration assumptions, and changes to modeling default values used in <br />this analysis is included within the CaIEEMod printout sheets that are provided in Appendix A of this <br />IS/MND. <br />Operations <br />The CaIEEMod software was also used to compile the mass daily emissions estimates from mobile <br />and area sources that would occur during long-term project operations. In calculating mobile-source <br />emissions, the CalEEMod default trip assumptions were applied to arrive at the total vehicle miles <br />traveled (VMT). Area-source emissions were compiled using CalEEMod default assumptions. <br />The analysis of roadway CO impacts followed the protocol recommended by Caltrans and published <br />in their Transportation Project-Level Carbon Monoxide Protocol (Garza 1997). It is also consistent <br />with procedures identified through the SCAQMD's CO modeling protocol. For any intersection that <br />shows potential to generate a CO hotspot by failing SCAQMD-recommended screening criteria, local <br />area CO concentrations are evaluated using the CALINE 4line-source dispersion model developed <br />by the California Department of Transportation (Caltrans) combined with EMFAC2012 emission <br />factors. All emissions calculation worksheets and air quality modeling output files are provided in <br />Appendix A. <br />Thresholds of Significance <br />Appendix G, Section III of the Environmental Checklist Form in the State CEQA Guidelines states that, <br />where available, the significance criteria established by the applicable air quality management or air <br />pollution control district may be relied upon to make determinations regarding air quality impacts. <br />Because of SCAQMD's regulatory role in the Basin, the significance thresholds and analysis <br />methodologies outlined in their CEQA Air Quality Handbook, Localized Significance Threshold <br />Methodology for CEQA Evaluations, and Particulate Matter (PM) 2.5 Significance Thresholds and <br />Calculation Methodology guidance documents were used in evaluating project impacts. The SCAQMD <br />construction and operational emissions thresholds identified in Table 3-4 is used for this <br />assessment. <br />Table 3.4. SCAQMD Emission Thresholds (lbs/day) <br />Pollutant <br />Nitrogen Oxides (NO%) <br />Reactive Organic <br />Compounds (ROC) <br />Suspended Particulate <br />Matter(PM10) <br />Fine Particulate Matter <br />Regional Emissions Thresholds <br /> <br />Construction Operation <br />100 55 <br />75 55 <br />150 150 <br />55 55 <br />Localized Emissions Thresholds2 <br />Construction <br />Operation <br />115 115 <br />N/A N/A <br />The Bat Nha Buddhist Meditation Center 3 17 June 2013 <br />Initial Study/Mitigated Negative Declaration IcF00215.12 <br />31 C-70