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i <br /> Ozone j <br /> Ozone is a colorless toxic gas that irritates the lungs and damages materials and !� <br /> vegetation. . Levels of 03 exceed national and state standards throughout the Sacramento <br /> Valley Air Basin. Because 03 formation is the result of photochemical reactions between <br /> oxides of nitrogen, (NOj and ROG, typically produced by combustion sources, peak <br /> concentrations of 03 occur downwind of precursor emission sources. The entire Basin, <br /> including San Joaquin County, is designated as a nonattainment area for state and federal Ij <br /> 03 standards (SJVUAPCD, 1994). <br /> Carbon Monoxide <br /> Carbon monoxide(CO) is a colorless gas, produced almost entirely from automobiles. This <br /> pollutant interferes with the transfer of oxygen to the brain. It is generally associated with <br /> areas of high traffic density. The CARB designated San Joaquin County and Stanislaus <br /> ` County as "attainment"for CO in 1994. The remainder of the Basin is designated as either it <br /> unclassified or attainment for state CO standards. For federal CO standards, the entire <br /> Basin is designated as unclassified/attainment (SJVUAPCD, 1994). F <br /> Nitrogen Dioxide <br /> Nitrogen dioxide (NO2), often used interchangeably with NO, is a reddish-brown gas that <br /> can cause breathing difficulties at high levels. Peak readings of NO2 occur in areas that <br /> F, have a high concentration of combustion sources (e.g., motor vehicle engines, power <br /> plants, refineries, and other industrial operations) in the vicinity. The entire Basin, including <br /> San Joaquin County, is designated as attainment for state and federal NO2 standards <br /> F (SJVUAPCD, 1994). <br /> Table 4.5-3: SJVAB Attainment Status Designations f <br /> Federal Designation Pollutant State Designation <br /> Nonattainment Ozone Nonattainment <br /> Nonattainment' CO -Stockton Attainment 'I <br /> Nonattainment' CO -Modesto Attainment <br /> Nonattainment CO Fresno Nonattainment <br /> Nonattainment' CO -Bakersfield Attainment j <br /> Nonattainment - PM,, Nonattainment <br /> Attainment Nitrogen Dioxide Attainment <br /> I <br /> Attainment Sulfur Dioxide Attainment <br /> No Federal Standard Sulfates Unclassified <br /> No designation Lead (Particulate) Attainment if <br /> 1- <br /> No Federal Standard Hydrogen Sulfide Unclassified <br /> No Federal Standard Visibility Reducing Particulates Unclassified <br /> Pending federal attainment designation. <br /> .E <br /> Source: SJVUAPCD 1994 Merchen 1997;EDAW 9997. y <br /> Draft Environmental Impact Report 4-67 ER-96-3 <br /> it <br />� Ip <br />