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III. Environmental Setting, Impacts,and Mitigations <br /> G. Air Quality <br /> TABLE III.G.1: PROJECT AREA AIR POLLUTANT SUMMARY, 1987-1991 <br /> Monitoring Data by Year/a/ <br /> P Std, 1M 1M 1M 1990 122-1 <br /> Ozono(03) <br /> Highest 1-hr. average,ppm/c/ 0.09 (,12 Q,2 Q.L1 012 Q 1 1 <br /> Number of standard excesses/d/ 10 18 3 9 10 <br /> r i (PM <br /> l0) <br /> 10) <br /> Highest 24-hr. average,ug/m3/c/ 50 15 M 144¢ 251 140 <br /> Number of standard excesses/e/ 22 7 18 22 21 <br /> Annual Geometric Mean, gg/m3 30 436 tL4 44.8 433 42 <br /> Carbon Monoxide(CO) <br /> Highest 1-hr. average,ppm 20.0 15.0 14.0 12.0 17.0 14.0 <br /> Number of standard excesses/d/ 0 0 0 0 0 <br /> Highest 8-hr. average,ppm 9.0 7.6 11 11.4 <br /> Number of standard excesses/d/ 0 1 1 2 1 <br /> NOTE: Underlined values are in excess of applicable standard. <br /> /a/ All data are from the Stockton-Hazelton Street monitoring station, about 25 miles to the <br /> northwest of the project site. <br /> /b/ State standard, not to be exceeded. <br /> /c/ ppm=parts per million; µg/m3= micrograms per cubic meter. <br /> /d/ Refers to the number of days in a given year during which the standard was exceeded. <br /> /e/ Samples taken every six days,about 60 samples total each year. <br /> SOURCE: California Air Resources Board,Air Quality Data Summaries, 1987-1991. <br /> than the corresponding NAAQS. Motor vehicle traffic on local roads and highways is the major <br /> source of air pollution near the project site. <br /> The criteria air pollutants for which the region is non-attainment are described below. Given that <br /> the project site is not in an urbanized area, and since the region(Air Basin)is not non-attainment <br /> for CO,CO is not described below. <br /> III.G.6 <br /> I <br />