P & D CONSULTANTS - 2002 - Laserfiche WebLink

Home Browse Search

Grand Avenue Widening Project Environmental Impact Report Section 3.0 2005. These measures rely on known technologies and proposed actions to be taken by several agencies that have statutory authority to implement such measures. Short and intermediate term measures in the 1997 AQMP include 35 stationary source, seven on road, six off road, one transportation control and indirect source, five advanced transportation technology and one further study measures. These measures, proposed to be implemented between 1995 and 2005, rely on both traditional command and control, and on alternative approaches to implement technological solutions and control measures. To ultimately achieve the defined AAQS, additional emissions reductions will be necessary, beyond the implementation of the short and intermediate measures. Long term measures rely on the advancement of technologies and control measures that can reasonably be expected to occur between 1997 and 2010. These long term measures rely on further development and refinement of known low and zero emissions control technologies for both mobile and stationary sources, in addition to technological breakthroughs. These measures are proposed to be implemented between 1997 and 2010. Monitored Air Quality Air quality at any site is dependent on the regional air quality and local pollutant sources. Regional air quality is determined by the release of pollutants throughout the Basin. Estimates for the Basin have been made for existing emissions, as documented in the AQMP. Those data indicate mobile sources are the major source of regional emissions in the Basin. Motor vehicles account for approximately 51 percent of volatile organic compounds (VOC), 63 percent of nitrogen oxide (NO.) emissions and approximately 78 percent of CO emissions in the Basin. The Grand Avenue project area is in AQMD Source Receptor Area 17 (Central Orange County). The Receptor Area 17 monitoring station, the nearest air quality monitoring station to Grand Avenue, is in Anaheim. Air quality data collected at this station is considered to be representative of the air quality in the Grand Avenue area. Air quality at the Source Receptor Area 17 station is monitored for 03, CO, NO2 and PM10. The air quality monitoring data for these pollutants at this station from 1998 to 2000 are shown in Table 3.4-1. The air quality data for Source Receptor Area 17 indicates that 03 is the pollutant of primary concern in the project area. The state standard for 03 was exceeded once every 40 days in 2000, once in 1999 and once every 37 days in 1998. 03 is a secondary pollutant, which means that it is not directly emitted. 03 is the result of photochemical reactions between other pollutants, most importantly hydrocarbons, and NO2. Pollutants emitted from upwind cities react during transport downwind to produce the oxidant concentrations experienced in Source Receptor Area 17. Many areas in the Basin contribute to the 03 levels experienced at the Source Receptor Area 17 station, with the more significant areas being those directly upwind. F.•IPROJ-ENMGrand eirlNew Text - GrandlSection 3 SplitlSection 3.4.doc Page 3.4-3