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City of Santa Ana <br />Environmental Checklist <br />III. Air Quality <br />Potentially <br />Significant <br />Impact <br />Less -than- <br />Significant <br />lmpactwith <br />Mitigation <br />Incorporated <br />Less -than- <br />Significant <br />Impact <br />No <br />Impact <br />When available, the significance criteria <br />established by the applicable air quality <br />management or air pollution control district may <br />be relied upon to make the following <br />determinations. Would the project: <br />a. Conflict with or obstruct implementation of <br />El <br />F-1 <br />10 <br />the applicable air quality plan? <br />b. Violate any air quality standard or contribute <br />E <br />a <br />El <br />substantially to an existing or projected air <br />quality violation? <br />c. Result in a cumulatively considerable net <br />O <br />o <br />0 <br />El <br />increase of any criteria pollutant for which the <br />project region is a nonattaimnent area for an <br />applicable federal or state ambient air quality <br />standard (including releasing emissions that <br />exceed quantitative thresholds for ozone <br />precursors)? <br />d. Expose sensitive receptors to substantial <br />Q <br />0 <br />El <br />pollutant concentrations? <br />e. Create objectionable odors affecting a <br />E <br />® <br />E] <br />substantial number of people? <br />Discussion <br />Regional Context <br />The proposed project site is located within the South Coast Air Basin (Basin), an area covering <br />approximately 6,745 square miles bounded by the Pacific Ocean to the west and south and the San <br />Gabriel, San Bernardino, and San Jacinto Mountains to the north and east, The Basin includes all of <br />Orange County and the non- desert portions of Los Angeles, Riverside, and San Bernardino Counties, <br />in addition to the San Gorgonio Pass area in Riverside County. The terrain and geographical location <br />determine the distinctive climate of the Basin, which is a coastal plain with connecting broad valleys <br />and low hills. <br />The Southern California region lies in the semi - permanent high- pressure zone of the eastern Pacific. <br />As a result, the climate is mild, tempered by cool sea breezes. The usually mild climatological pattern <br />is interrupted infrequently by periods of extremely hot weather, winter storms, or Santa Ana winds. <br />The extent and severity of the air pollution problem in the Basin is a function of the area's natural <br />physical characteristics (weather and topography) as well as human -made influences (development <br />patterns and lifestyle). Factors such as wind, sunlight, temperature, humidity, rainfall, and <br />topography all affect the accumulation and dispersion of pollutants throughout the Basin, making it <br />an area of high pollution potential. <br />The Academy Charter High School 3 13 June 2012 <br />Initial Study /Mitigated Negative Declaration iCF00914.11 <br />