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MacArthur Project Modification — Santa Ana - Air Quality Assessment <br />KPC Environmental, Inc. <br />4.0 Air Quality Data for SCAB <br />4.1 Air Quality Management Planning &Regulatory Setting <br />The Federal Clean Air Act (1977 Amendments) required that designated agencies in any <br />area of the nation not meeting national clean air standards must prepare a plan <br />demonstrating the steps that would bring the area into compliance with all national <br />standards. Table 4 -1 contains the federal and state emissions standards with relevant <br />health concerns. <br />Table 4 -1 Ambient Air Quality Standards <br />AIR <br />STATE STANDARD <br />FEDERAL <br />MAJOR SOURCES <br />MOST RELEVANT <br />POLLUTANT <br />PRIMARY <br />EFFECTS <br />STANDARD <br />Ozone (O3) <br />1 hr - 0.09 ppm <br />1 hr- * <br />Motor vehicles, paints, <br />Short-term exposures: <br />8 hrs - 0.07 ppm <br />8 hrs - 0.08 ppm <br />coatings, solvents. <br />Pulmonary function <br />decrements and breathing <br />difficulty. Long -term <br />exposures: Risk to public <br />health, vegetation damage, <br />property damage. <br />Carbon Monoxide <br />1 hr - 20 ppm <br />1 hr - 35 ppm <br />Internal combustion <br />Aggravation of aspects of <br />(CO) <br />8 hrs - 9 ppm <br />8 hrs - 9 ppm <br />engines (vehicles). <br />coronary heart disease; <br />decreased exercise tolerance <br />in persons w. vascular and <br />lung disease; impairment of <br />CNS functions; possible <br />increased risk to fetuses. <br />Nitrogen Dioxide <br />Annual Average - 0.03 <br />Annual Average - 0.053 <br />Internal combustion <br />Risk to public health implied <br />(NO2) <br />ppm <br />ppm <br />engines (vehicles). <br />by pulmonary and extra- <br />I hr - 0.018 ppm <br />1 hr - * <br />pulmonary biochemical and <br />cellular changes and <br />pulmonary structural changes; <br />contributions to atmospheric <br />discoloration. <br />Sulfur Dioxide <br />Annual Average - * <br />Annual Average - 0.03 <br />Fuel combustion, <br />Broncial constriction <br />(SO2) <br />1 hr - 0.25 ppm <br />ppm <br />petroleum refining <br />accompanied by symptoms <br />24 hrs - 0.04 ppm <br />1 hr - * <br />processes, chemical <br />which may include wheezing, <br />24 hrs - 0.14 ppm <br />facilities. <br />shortness of breath and chest <br />tightness during exercise or <br />physical activity in persons w. <br />asthma. <br />Suspended <br />Annual Arithmetic Mean <br />Annual Arithmetic Mean - <br />Construction, industry, <br />Excess deaths from short <br />Particulate Matter <br />- 20gg1m3 <br />* <br />agriculture, vehicles, <br />terns exposures and <br />(PM I <br />and natural occurrences <br />exacerbation of symptoms in <br />24 hrs - 50gg/m3 <br />(wind, storms) <br />sensitive patients wl <br />24 hrs - 150gg/m3 <br />respiratory disease; declines <br />in pulmonary function <br />especially in children; <br />increased risk of premature <br />death from heart or lung <br />diseases in elderly. <br />Suspended <br />Annual Arithmetic Mean <br />Annual Arithmetic Mean - <br />Construction, industry, <br />Particulate Matter <br />- 12gg/m3 <br />15gg/m3 <br />agriculture, vehicles, <br />(PM2.5) <br />and natural occurrences <br />24 hrs - * <br />24 hrs - 35gg/m3 <br />(wind, storms) <br />Lead (Pb) <br />Monthly - 1.5gg1m3 <br />Monthly <br />Battery manufacturing <br />Learning disabilities in <br />and recycling. <br />children; impairment of blood <br />Quarterly - * <br />Quarterly - I.5gglm3 <br />Combustion processes. <br />formation and nerve <br />conduction. <br />Sulfates (SO4) <br />24 hrs - 25gg/m3 <br />* <br />Industrial Processes. <br />Decrease in ventilatory <br />function; aggravation of <br />asthma symptoms; vegetation <br />damage; degradation of <br />visibility. <br />Sources — CARB and SCAQMD * - no standard established ppm — parts per million, gg/m3 — micrograms per cubic meter <br />02/02/ 11 5 <br />