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HARBOR BLVD. MIXED USE TRANSIT CORRIDOR PLAN FINAL FIR <br />CITY OF SANTA ANA <br />5. Environmental Analysis <br />AIR QUALITY <br />adults can tolerate occasional exposure to air pollutant concentrations considerably above these minimum <br />standards before adverse effects are observed. <br />Both California and the federal government have established health based AAQS for seven air pollutants. As <br />shown in Table 5.2 -1, these pollutants include 03, NO2, CO, S02, PMto, PMz s, and lead (Pb). In addition, the <br />state has set standards for sulfates, hydrogen sulfide, vinyl chloride, and visibility- reducing particles. These <br />standards are designed to protect the health and welfare of the populace with a reasonable margin of safety. <br />Table 5.2 -1 Ambient Air Quality Standards for Criteria Pollutants <br />October 2014 Page 5.2 -7 <br />California <br />Federal Primary <br />Pollutant <br />Averaging Time <br />Standard <br />Standard <br />Major Pollutant Sources <br />Ozone <br />1 hour <br />0.09 ppm <br />` <br />(03) <br />Motor vehicles, paints, coatings, and solvents. <br />8 hours <br />0.070 ppm <br />0.075 ppm <br />Carbon Monoxide <br />1 hour <br />20 ppm <br />35 ppm <br />Internal combustion engines, primarily gasoline - <br />(CO) <br />powered motor vehicles. <br />8 hours <br />9.0 ppm <br />9 ppm <br />Nitrogen Dioxide <br />Annual Average <br />0.030 ppm <br />0.053 ppm <br />Motor vehicles, petroleum-refining operations, <br />(NO2) <br />industrial sources, aircraft, ships, and railroads. <br />1 hour <br />0.18 ppm <br />0.100 ppm <br />Sulfur Dioxide <br />Annual Arithmetic <br />0.030 ppm2 <br />(SO2) <br />Mean <br />Fuel combustion, chemical plants, sulfur recovery <br />1 hour <br />0.25 ppm <br />0.075 ppm' <br />plants, and metal processing. <br />24 hours <br />0.04 ppm <br />0.014 ppm2 <br />Respirable Coarse <br />Annual Arithmetic <br />20 Ng /m3 <br />Dust and fume - producing construction, industrial, <br />Particulate Matter <br />Mean <br />and agricultural operations, combustion, <br />(PM10) <br />atmospheric photochemical reactions, and natural <br />24 hours <br />50 Ng /m3 <br />150 Ng /m3 <br />activities (e.g., wind- raised dust and ocean sprays). <br />Respirable Fine <br />Annual Arithmetic <br />12 /m3 <br />Ng <br />12 /ma.a <br />Ng <br />Dust and fume - producing construction, industrial, <br />Particulate Matter <br />Mean <br />and agricultural operations, combustion, <br />(PM25) <br />atmospheric photochemical reactions, and natural <br />24 hours <br />35 Ng /m3 <br />activities (e.g., wind- raised dust and ocean sprays). <br />Lead <br />Monthly <br />1.5 Ng /m3 <br />(Pb) <br />Present source : lead smelters, battery <br />Quarterly <br />1.5 Ng /m3 <br />manufacturing & recycling facilities. Past source: <br />combustion of leaded gasoline. <br />3 -Month Average <br />0.15 Ng /m3 <br />Sulfates <br />24 hours <br />25 Ng /m3 <br />Industrial processes. <br />(SO4) <br />October 2014 Page 5.2 -7 <br />