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City of Santa Ana <br />3.3 Air Quality <br />Would the project: <br />California Environmental Quality Act <br />Initial Study/Mitigated Negative Declaration <br />Less Than <br />Potentially <br />Significant <br />Less Than <br />No <br />Environmental Issue <br />Significant <br />with <br />Significant <br />Impact <br />Impact <br />Mitigation <br />Impact <br />Incorporated <br />a) Conflict with or obstruct implementation of the <br />applicable air quality plan? <br />X <br />b) Result in a cumulatively considerable net <br />increase of any criteria pollutant for which the <br />project region is non -attainment under an <br />X <br />applicable federal or state ambient air quality <br />standard? <br />c) Expose sensitive receptors to substantial <br />pollutant concentrations? <br />X <br />d) Result in other emissions (such as those leading <br />to odors) adversely affecting a substantial number <br />X <br />of people? <br />Discussion: <br />a) The City of Santa Ana is located within the South Coast Air Basin (SCAB), which is bound by the San <br />Gabriel, San Bernardino, and San Jacinto Mountains to the north and east, and the Pacific Ocean to <br />the south and west. The air quality in the SCAB is managed by the South Coast Air Quality <br />Management District (SCAQMD). The SCAB has a history of recorded air quality violations and is an <br />area where both state and federal ambient air quality standards are exceeded, and therefore, is <br />subject to the 2022 Air Quality Management Plan (AQMP). The 2022 AQMP includes integrated <br />strategies and control measures needed to meet National Ambient Air Quality Standards (NAAQS). <br />Construction will conform with the requirements of the 2022 AQMP and will use the strategies in the <br />AQMP during all phases of construction. The Project will result in temporary impacts to air quality <br />due to the construction activities, and will therefore, have a less than significant impact with the 2022 <br />AQMP. <br />b) The Project is located in the SCAB, which is a non -attainment area for respirable fine particulate <br />matter (PM) 2.5 (PM2.5), Lead, and Ozone. The SCAB is a designated attainment area for all other <br />criteria pollutants. The SCAQMD has established Regional Significance Thresholds for each criteria <br />pollutant. Potential air emissions were calculated using the CalEEMod, Version 2022.1.1.28, a model <br />used to quantify air impacts from land use Projects located throughout California. The following table <br />shows the daily emissions rate for unmitigated construction during the summer, in comparison to the <br />Regional Significance Thresholds. <br />-11- <br />CWE7 <br />