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7.A. - Page 145 �/holesale Redwood City GDF Expansion Air Quality/Climate Change Analysis Page 10 Table 3. Air Quality Data Summary (2006-2011) - Redwood City Station. Monitoring Data by Year Pollutant 2006 2007 2008 2009 2010 2011 Ozone Highest 1 hour average (ppm) 0.085 0.077 0.082 0.087 0.113 0.076 Days over California standard (0.09 ppm) 0 0 0 0 2 0 Highest 8 hour average (ppm) 0.063 0.070 0.070 0.063 0.077 0.066 Days over federal standard (0.075 ppm) 0 0 0 0 1 0 Days over California standard (0.07 ppm) 0 0 0 0 1 0 Respirable Particulate Matter(PM�o) Highest 24 hour average- 66.2/69.9 52.2/55.8 38.2/41.0 NA/NA NA/NA NA/NA federal/California (�ag/m3) Estimated Days over federal 24 Hour 0.0 0.0 Insuf NA NA NA standard (150 �ag/m3) Estimated Days over California 24 Hour 10.2 6.0 Insuf. NA NA NA standard (50 �ag/m3) State annual average (California standard 19.8 19.6 Insuf NA NA NA 20 �ag/m3) Respirable Particulate Matter(PM2.5) Highest 24 Hour average (�ag/m3) 75.3 45.4 27.9 31.7 36.5 39.7 Estimated days over federal standard 2.6 2.9 0.0 0.0 1.0 1.0 �35 N9�m3) Federal annual average (15 �ag/m3) 9.6 8.2 9.1 8.6 8.3 8.7 California annual average (12 �ag/m3) 9.6 8.3 10.5 Insuf Insuf Insuf Carbon Monoxide Highest 1 hour average (ppm) 5.5 5.5 4.3 3.5 3.3 3.7 Days over federal standard (35 ppm) 0 0 0 0 0 0 Days over California standard (20 ppm) 0 0 0 0 0 0 Highest 8 hour average (ppm) 2.44 2.33 1.86 1.76 1.72 1.67 Days over federal/California standard 0/0 0/0 0/0 0/0 0/0 0/0 �9 ppm) Nitrogen Dioxide Highest 1 hour average (ppm) 0.069 0.057 0.069 0.056 0.059 0.056 Days over California standard (0.18 ppm) 0 0 0 0 0 0 Federal annual average (53 ppb) 14 13 14 12 12 12 California annual average (0.030 ppm) 0.014 0.013 0.014 0.012 0.012 0.012 Notes: 1. Data are derived from CARB, 2012b. 2. The BAAQMD ceased monitoring of PM�o at the Redwood City monitoring station on June 30, 2008. (BAAQMD, 2009, page 57.) Based on monitoring data reports on ARB's iADAM web site, monitoring was conducted on only 23 of 60 monitoring days during 2008, insufficient to allow calculation of estimated days over the California and federal 24-hour standards, and the California annual average PM10 concentration for 2008. 3. Data in bold font refers to values over ambient air quality standards. "NA" indicates that data are not available for the period. "Insuf' indicates that available data are not sufficient to determine estimated days over a standard or to calculate annual averages. 4. Abbreviations: "ppm"-parts per million; �ag/m3-micrograms per cubic meter. 5. Multiple monitored values reported for 24 hour PM�o and annual PM2.5 reflect differences in federal and California ambient air quality monitoring methods. 7/30/2012