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2018 2019 2020 <br />Maximum 1-Hour Concentration (ppm)0.112 0.096 0.142 <br /> Days > CAAQS (0.09 ppm)1 1 6 <br />Maximum 8-Hour Concentration (ppm)0.071 0.082 0.098 <br /> Days > NAAQS (0.070 ppm)1 1 15 <br /> Days > CAAQS (0.070 ppm)1 1 16 <br />Maximum 8-Hour Concentration (ppm)*** <br /> Days > CAAQS (9 ppm)0 0 0 <br /> Days > NAAQS (9 ppm)0 0 0 <br />Maximum 1-Hour Concentration (ppm)0.066 0.059 0.071 <br /> Days > CAAQS (0.18 ppm)0 0 0 <br />Maximum 24-Hour Concentration (µg/m3)94.6 127.6 74.8 <br /> Days > NAAQS (150 µg/m3)0 0 0 <br /> Days > CAAQS (50 µg/m3)2 4 5 <br />Annual Average (µg/m3)17.9 24.6 30.8 <br />Maximum 24-Hour Concentration (µg/m3)68.0 37.1 64.8 <br /> Days > NAAQS (35 µg/m3)7 4 12 <br />Annual Average (µg/m3)11.4 9.3 12.2 <br />Notes: <br />(1) CAAQS = California Ambient Air Quality Standard; NAAQS = National Ambient Air Quality Standard; ppm = parts per million <br />* Means there was insufficient data available to determine value. <br />Source: http://www.arb.ca.gov/adam/topfour/topfour1.php. Data from the Anaheim-Pampas Lane Monitoring Station, <br /> unless otherwise noted. <br />Year <br />Air Quality Monitoring Summary <br />Table 4 <br />Pollutant (Standard)1 <br />Ultra-Fine <br />Particulates <br />(PM2.5):2 <br />Ozone: <br />Carbon <br />Monoxide: <br />Nitrogen Dioxide: <br />Inhalable <br />Particulates <br />(PM10): <br />Cabrillo at First Mixed-Use Residential Project <br />Air Quality, Global Climate Change, HRA and Energy Impact Analysis <br />19386236/27/2022 <br />Planning Commission 2 –76