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City of Santa Ana Environmental Checklist Because significant impacts would not occur at any intersections located adjacent to sensitive receptors, no significant impacts are anticipated to occur at any other locations in the study area because the conditions yielding CO hotspots would not be worse than those occurring at the analyzed intersections. Consequently, the sensitive receptors that are included in this analysis would not be significantly affected by CO emissions generated by the net increase in traffic that would occur under the project. Because the project does not cause an exceedance, or exacerbate an existing exceedance of an ambient air quality standard, the project's localized operational air quality impacts would be less than significant. No mitigation measures are necessary, With respect to the project's onsite mass emissions, Table 3-9 shows that onsite operations-period emissions would be below SCAQMD's localized significance thresholds. Impacts from emissions of these criteria pollutants would be less than significant, No mitigation measures are necessary. Table 3.9. Estimate of Operation-Period Localized (onsite) Emissions ROG Nox CO sox PM10 PM2.5 Onsite Area Source Emissions Phase la 3 <1 <1 <1 <1 <1 SCAQMD Daily Significance Threshold (lbs/day)h 115 715 2 1 Exceed SigniffcanceThreshold? No No No No No No Notes: a Onsite emissions calculated using the CaIEEMod emissions model (area-source emissions). Model output sheets are provided in Appendix A. h The project site is located in SCAQMD SEA 17. These LSTs are based on the site location SEA, distance to the nearest sensitive-receptor location from the project site (25 meters), and the project area (2 acres). Source: ICF 2012. Toxic Air Contaminants SCAQMD recommends that health risk assessments be conducted for substantial sources of diesel particulate emissions (e.g., truck stops and warehouse distribution facilities) and has provided guidance for analyzing mobile source diesel emissions. In addition, typical sources of acutely and chronically hazardous TACs include industrial manufacturing processes, automotive repair facilities, and dry cleaning facilities. Since the proposed project would not contain such uses, the proposed project does not warrant a health risk assessment. Potential project-generated air toxic impacts on surrounding land uses would be less than significant. No mitigation measures are necessary. e. Create objectionable odors affecting a substantial number of people? Less-than-Significant Impact According to the SCAQMD CEQA Air Quality Handbook, land uses associated with odor complaints typically include agricultural uses, wastewater treatment plants, food processing plants, chemical plants, composting, refineries, landfills, dairies, and fiberglass molding. The proposed project does not include any uses identified by the SCAQMD as being associated with odors and therefore would not produce objectionable odors. Odors resulting from the construction of the proposed project are not likely to affect a substantial number of people due to the fact that construction activities do not usually emit offensive odors. Potential odor emitters during construction activities include asphalt paving and the use of architectural coatings and solvents. SCAQMD Rules 1108 and 1113 limit the amount of VOCs from The Bat Nha Buddhist Meditation Center 3.24 Initial Study/Mitigated Negative Declaration June 2013 ICi00215.12 31 C-77