2011-022 - Addendum to the FInal Environmental Impact Report No. 2004-02

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MacArthur Project Modification — Santa Ana - Air Quality Assessment KPC Environmental, Inc. The South Coast Air Basin (SCAB) could not meet the deadline with the Federal Standards for ozone, nitrogen dioxide, carbon monoxide, or PM -10 and as such was mandated to develop a plan for bringing the SCAB into compliance. In the SCAB, the agencies designated by the governor to develop regional air quality plans are the SCAQMD and the Southern California Association of Governments (SCAG). The two agencies first adopted an Air Quality Management Plan (AQMP) in 1979 and revised it several times as earlier attainment forecasts were shown to be overly optimistic. The 1990 Federal Clean Air Act Amendment (CAAA) required that all states with airshed designated with "serious" or worse ozone problems submit a revision to the State Implementation Plan (SIP). Amendments to the SIP have been proposed, revised and approved over the past decade. The currently adopted clean air plan for the basin is the 1999 SIP Amendment, which accelerates the schedule for a number if new SCAQMD rules and regulations, approved by the U.S. EPA in 2000. The U.S. EPA has yet to approve the 2003 Air Quality Management Plan (AQMP). The Air Quality Management District (AQMD) adopted the most recent updates to the clean air "blueprint" in June 2007. The 2007 Air Quality Management Plan (AQMP) provides an outline for achieving reductions in emissions while increasing air quality within the SCAB. Table 4 -2 Regional Criteria Pollutant Attainment Status SCAB Pollutant State Federal Ozone Extreme Non - attainment Non - attainment PM 1 0 Serious Non- attainment Non - attainment PM2.5 Non - attainment Non - attainment Sox Attainment Attainment CO Attainment Attainment NOx Attainment Attainment Lead Attainment Attainment Other (vinyl chloride, hydrogen sulfide, etc) Unclassified or Attainment Unclassified or Attainment Ozone: The EPA has replaced the one -hour ozone standard with an eight -hour standard set at 0.08 ppm. The new standard accepted by the USEPA includes a calculation where the three highest measurements are disregarded and the fourth highest measurement is averaged over a 3 -year period in determining if the standard is met. PM10 (Course particulate matter): On September 21, 2006 the Federal standard of 50 ug/m3 was replaced with a new 24 -hour standard of 150 ug/m3. PM2.5 (Fine particulate matter): In September 2006 the Federal standard of 65 ug /m3 was reduced to 35 ug /m3 for the new 24 -hour standard. 02/02/11 6