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75C - PH - BRISTOL EIR FROM WARNER TO ST. ANDREW
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75C - PH - BRISTOL EIR FROM WARNER TO ST. ANDREW
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Last modified
4/8/2015 3:32:45 PM
Creation date
4/2/2015 4:21:45 PM
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City Clerk
Doc Type
Agenda Packet
Agency
Public Works
Item #
75C
Date
4/7/2015
Destruction Year
2020
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maintenance, drought - tolerant plant materials, thereby reducing long- <br />term costs for maintenance and water consumption. <br />s Ib IM <br />Summary <br />A detailed air quality impact assessment for this project was prepared by Endo <br />Engineering, under separate cover. That study forms the basis for the -• <br />following discussion and is available for public review at offices of the City of <br />Santa Ana Public Services Agency. <br />Two types of air pollutant sources must be considered with respect to the <br />proposed project: stationary sources and mobile sources. Stationary source <br />considerations include emissions on -site from construction activities, as well as - <br />emissions at the power plant associated with the electrical requirements of the <br />project. Mobile source considerations include exhaust emissions resulting from <br />short -term construction activities and long -term traffic changes associated with <br />the project. <br />Temporary, short -term pollutant emissions will occur during construction of - <br />the proposed street improvements, including fugitive dust, construction <br />equipment and vehicle exhaust and construction crew vehicle exhaust. These <br />emissions will vary from day to day as construction levels change, but should <br />be minimal and dispersed without significant impact on sensitive receptors. <br />Long -term carbon- monoxide emissions along the project route would decrease <br />by approximately 3,666 pounds /day by the year 2006, if the project is <br />implemented. Hydrocarbon emissions would decrease by approximately 376 <br />pounds /day by 2006, if the proposed improvements are built. Nitrogen dioxide <br />emissions would increase by about 5 pounds /day. No significant change in the <br />levels of sulfur dioxide and particulates would occur with or without the <br />project. <br />The reduction in carbon monoxide and total hydrocarbon emissions would <br />result from the reduction in traffic congestion, which would lead to slightly <br />higher speeds and shorter travel times. Higher traffic speeds, however, would _ <br />also result in increased emissions of oxides of nitrogen from each vehicle. <br />Carbon monoxide concentrations were estimated using the Caline 3 computer <br />model, at four intersections where sensitive receptors are located, for both <br />"project" and "no- project" scenarios, and for both 1987 and estimated year 2006 <br />traffic volumes. The results indicated that, if the project were currently in <br />place, there would be no difference in CO concentrations at the intersections <br />analyzed. Estimates for year 2006 traffic volumes indicated that the proposed <br />NW <br />75C -143 <br />
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