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1 1. ❑ EXECUTIVE SUP4 ARY <br />1.1 Air Quality Summary <br />Existing Air Quality <br />1. The South Coast Air Basin has been designated a nonattain- <br />ment area because of violations of the national ambient air <br />quality standards for carbon monoxide, ozone, nitrogen diox- <br />ide and total suspended particulates. <br />2. Of all the air pollutants monitored at the Anaheim moni- <br />toring station, sulfur dioxide, sulfate, and lead did not <br />equal or exceed the state or federal ambient air quality <br />standards between 1983 and 1985. <br />3. Ozone and particulates represent the major ambient air quai- <br />1 ity problems standards in the project vicinity. <br />4. Carbon monoxide levels monitored from 1983 to 1985 showed <br />ambient air quality standard exceedances on only one percent <br />of the days monitored and a maximum one -hour value of 19.0 <br />PPM. <br />Air Quality Impacts <br />1. Implementation of the project will generate exhaust emis- <br />sions from construction equipment and the automobiles of the <br />construction crew, as well as fugitive dust during soil <br />movement. Sensitive receptors near the project site will <br />find these air pollutant emissions a temporary nuisance. <br />2. According to the traffic impact study, the vehicle miles of <br />travel on each link will not change; however, as a result of <br />the project, the average route speeds on Bristol Street will <br />increase with the project. <br />I <br />3. In the future design year (2006) the increase in average <br />route speeds along Bristol Street will result in a decrease <br />in carbon monoxide emissions (3666 pounds /day) and total <br />hydrocarbon emissions (376 pounds /day) and an increase in <br />nitrogen dioxide emissions (5 pounds /day) and no change in <br />SOx and particulate emissions. <br />4. Caline 3 modelling indicates that the one -hour and eight - <br />hour state and federal ambient air quality standards for <br />carbon monoxide are currently exceeded at 50 feet from the <br />intersections in the project vicinity. <br />5. Caline 3 modeling indicates that the one -hour State and <br />federal ambient air quality standards will not be exceeded <br />for the future design year (2006) with the "build" alterna- <br />tive. <br />1 -1 <br />