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City of Santa Ana Environmental Checklist <br />Thresholds of Significance <br />Appendix G, Section [I[ 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 (pounds per day) <br />Regional Emissions Thresholds <br />Pollutant <br />Construction Operation <br />Localized Emissions Thresholds <br />Construction Construction Operation <br />(5 acre) (2 acre) <br />Nitrogen Oxides 100 5S 183 115 183 <br />(NOx) <br />Reactive Organic 75 55 N/A N/A N/A <br />Compounds (ROC) <br />Suspended <br />Particulate Matter 150 150 13 6 3 <br />(PM10) <br />Fine Particulate 55 55 7 4 2 <br />Matter (PM2,5) <br />Sul hit- Oxides (SOX) 150 150 N/A N/A N/A <br />Carbon Monoxide 550 550 1,253 715 1,253 <br />(CO) <br />Lead (Pb)t 3 3 N/A N/A N/A <br />Notes: <br />1 The proposed project would have no lead emissions sources during the construction or operations period. <br />As such, lead emissions are not evaluated in this report <br />Localized thresholds derived from SCAQMD Localized Significance'rhreshold Tables and are based on the <br />project location (Source Receptor Area [SRA] 17, the Central Orange County), project area disturbed in any <br />given day (5 -acres for Phase 1 and 2 -acres for Phase 11), and the distance to the nearest sensitive receptor (25 <br />meters). <br />Source: SCAQMD CEQA Air Quality Handbook, 1993 (As amended at http: / /wmv.agmd.gov /cega/ <br />handbook /signthres.pdf); SCAQMD Localized Significance Threshold Methodology for CEQA Evaluations; <br />and Particulate Matter (PM) 2.5 Significance Thresholds and Calculation Methodology. <br />Would the project: <br />a. Conflict with or obstruct Implementation of the applicable air quality plan? <br />No Impact. SCAQMD is required, pursuant to the federal CAA, to reduce emissions of criteria <br />pollutants for which the Basin is in nonattainment (i.e., 03, PM 10, and PM2.5). The project would be <br />subject to SCAQMD's AQMP, which contains a comprehensive list of pollution control strategies <br />directed at reducing emissions and achieving ambient air quality standards. These strategies are <br />The Academy Charter High School 3 20 June 2012 <br />Initial Study /Mitigated Negative Declaration ICF 00914.11 <br />