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4.6 Air Quality <br /> TABLE 4.6-3 <br /> .. AIR QUALITY DATA SUMMARY(1999-2003)FOR THE PROJECT AREA <br /> Monitoring Data by Year <br /> Pollutant Standards 1999 2000 2001 2002 2003 <br /> Ozone: Tracy-24371 Patterson Pass Road <br /> Highest 1 Hour Average(ppm)b 0.132 0.122 0.114 0.107 0.103 <br /> Highest 1-hour average,ppm` <br /> Days over State Standard 0.09 16 7 4 11 5 <br /> ` Exceedances° <br /> Days over National Standard 0.12 1 0 0 0 0 <br /> .. Highest 8 Hour Average(ppm)b 0.08 0.113 0.094 0.086 0.096 0.089 <br /> Highest 8-hour average,ppm` <br /> Days over National Standard 10 3 1 3 2 <br /> Exceedances <br /> Particulate Matter(PM1o): Modesto-14th Street <br /> Highest 24 Hour Average(pg/m3)b 135 119 160 86 71 <br /> Highest 24-hour average, <br /> ugp/m3` <br /> Est.Days over State Standardc 50 87 68 61 76 26 <br /> Exceedances/Samples <br /> Est.Days over National Standardc 150 0 0 3 0 0 <br /> r <br /> Annual Average(pg/m3)b Annual 30 40.2 35.4 37.0 37.2 29.5 <br /> average,ug/m3, <br /> Particulate Matter(PM2.5): Modesto-14th Street <br /> Highest 24 Hour Average(pg/m3)b 108 77 95 87 64 <br /> Highest 24-hour average, <br /> ugp/m3` <br /> Days over National Standard 65 11 5 3 3 0 <br /> Annual Average(pg/m3)b Annual 12 24.9 18.7 15;6 18.7 19.0 <br /> average,ug/m3` <br /> ` Generally,stale standards and national standards are not to be exceeded more than once per year. <br /> ° ppm=parts per million;•g/m3=micrograms per cubic meter. <br /> ` PMro is not measured every day of the year.Numberof estimated days over the standard is based on 365 days per year. <br /> NOTES: Values in bold are in excess of applicable standard. <br /> SOURCE: California Air Resources Board,Summaries of Air Quality Data,1999,2000,2001,2002,2003;< .arb.ca.gov/adam <br /> /cgi-bin/db2w tpolltrendsb.d2w/start,and California Air Resource Board,California Ambient Air Quality Data,1980-2003. <br /> r <br /> _ other air-quality-related health problems than the general public.Residential areas are also <br /> considered to be sensitive to air pollution because residents(including children and the elderly) <br /> tend to be at home for extended periods of time,resulting in sustained exposure to any pollutants <br /> .. present. <br /> RMC Pacific Vernalis Quarry Mining and Reclamation Project .6-15 ESA/203015 <br /> Draft Environmental Impact Report May 2006 <br />