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MacArthur Project Modification - Santa Ana - Air Quality Assessment <br />KPC Environmental, Inc. <br />The following table contains the most recently released air quality monitoring data for the <br />area closest to the project site according to the SCAQMD SRA/City Table. The <br />monitoring site selected for this area includes the data from station #17 which is located <br />in the Central Orange County. <br />The most recent data (2008) from the air quality monitoring station SRA #17 indicates <br />there were 4 days on which the current Federal 8-hour ozone standards were exceeded <br />and the current State 8-hour standard was exceeded a total of 10-days. Monitoring for <br />PM 10 and PM2.5 at SRA #17 indicates no exceedances of PM 10 for the Federal 24-hour <br />standard and 3- exceedances for the State 24-hour standard. PM2.5 exceeded the current <br />Federal standard a total of 13 days during 2008. CO concentrations in the area did not <br />exceed federal or state standards. <br />Table 4-3 Regional Air Quality Summary <br />Source Receptor Area 24 Years 2006 - 2008 <br /> Number of <br /> <br />Pollutant <br />California <br />Federal Maximum Days samples <br />exceed <br /> Standard Standard Year Measured Federal/State <br /> Concentration Standards <br />Carbon Monoxide 9.0 ppm 9.5 ppm 2006 3-0 0/0 <br /> 8-hour 8-hour 2007 2.9 0/0 <br /> 2008 3.6 0/0 <br />Ozone 0.09 ppm 0.12 ppm 2006 0.11 0/5 <br /> 1-hour 1-hour 2007 0.127 112 <br /> 2008 0.105 0/2 <br />Nitrogen Dioxide 0.25 ppm 0.0534 ppm 2006 0.11 0/0 <br />(N02) 1-hour AAM (a) 2007 0.10 0/0 <br /> 2008 0.09 0/0 <br />Sulfur Dioxide 0.25 ppm 0.03 ppm 2006 - 0/0 <br />(802) 1-hour AAM 2007 - 0/0 <br /> 0.04 ppm 0.14 ppm 2008 0/0 <br /> 24-hour avg. 24-hour avg. <br /> (b) 0.50 ppm <br /> 3-hour avg. b <br />Fine Particulate 50 ug/m3 150 ug/m3 2006 104 017 <br />Matter (PM-10) 24-hour 24-hour 2007 75 015 <br /> 2008 61 013 <br />Fine Particulate 65 ug/m3 (d) 2006 56.2 810 <br />Matter (PM-2.5) 35 ug/m3 2007 79.4 1410 <br /> 24-hour 2008 67.9 1310 <br />ppm -Parts Per Million AAM - Annual Arithmetic Mean -- Pollutant Not Monitored <br />(a) The federal standard is annual arithmetic mean N)2 greater than 0.0534 ppm. <br />(b) The state standards are 1-hour average S02 > 0.03 ppm, 24-hour average > 0.04 ppm, and 3-hour average > 0.05 ppm. <br />The federal standards are annual arithmetic mean S02 > 0.03 ppm, 24-hour average > 0.14 ppm, and 3-hour average > <br />0.50 ppm. <br />(c) Less than 12-months of data available. <br />(d) Revised Federal standard for PM2.5 from 65 down to 35 ug/m3 effective December 17, 2006. <br />02/02/11 <br />75B-116