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5.11 Air Resources

Federal 8-Hour Ozone Attainment Plan (Western Mojave Desert Non-attainment Area). The
SIP revision was submitted to the USEPA in July 2008. As of the preparation of this EIR, the
SIP revision has not been approved.

The AVAQMD adopted the List and Implementation Schedule for District Measures to Reduce
PM Pursuant to Health &Safety Code §39614(d) on August 16, 2005. The list was prepared in
response to the code which requires CARB, in consultation with local air pollution
management districts, to develop and adopt a list of the most readily available, feasible, and
cost-effective control measures that could be employed by CARB and the air districts to
reduce PM10 and PM2.5.

South Coast Air Quality Management District

Approximately 9 percent of the Project site is under the jurisdiction of the SCAQMD and lies
within the SoCAB. The SCAQMD was established in 1977 by merging the individual air
pollution control districts of the four counties within the SoCAB: Orange County and the non-
desert portions of Los Angeles, Riverside, and San Bernardino Counties. The SoCAB is bound
on the west by the Pacific Ocean, on the north by the San Gabriel Mountains, on the north
and east by the San Bernardino Mountains, on the southeast by the San Jacinto Mountains,
and on the south the Santa Ana Mountains. The SoCAB occupies a low plain and the
surrounding mountains channel and confine air flow, which traps air pollutants.

The Federal CAA requires the preparation of plans to demonstrate attainment of the NAAQS
for which an area is designated as being in nonattainment. Furthermore, the CCAA requires
the revision of these plans every three years to address reducing pollutant concentrations
that exceed the CAAQS. The SCAQMD and SCAG, in coordination with local governments and
the private sector, develop the Air Quality Management Plan (AQMP) for the SoCAB to satisfy
these requirements. The AQMP is the most important air management document for the
SoCAB because it provides the blueprint for meeting State and federal ambient air quality
standards.

On November 28, 2007, CARB submitted a State Implementation Plan (SIP) revision to the
USEPA for O3, PM2.5 (1997 Standard), CO, and NO2 in the SoCAB. This revision is identified
as the “2007 South Coast SIP”. The 2007 South Coast SIP demonstrates attainment of the
federal PM2.5 standard in the SoCAB by 2014 and attainment of the federal 8-hour O3
standard by 2023. This SIP also includes a request to reclassify the O3 attainment designation
from “severe” to “extreme”. The USEPA approved the redesignation effective June 4, 2010.
The “extreme” designation requires the attainment of the 8-hour O3 standard in the SoCAB
by June 2024. CARB approved PM2.5 SIP revisions in April 2011 and the O3 SIP revisions in
July 2011. The USEPA approved the PM2.5 SIP on September 25, 2013, and has approved 47
of the 62 1997 8-hour O3 SIP requirements (USEPA 2016b). On November 30, 2014, the
USEPA proposed a finding that the SoCAB has attained the 1997 PM2.5 standards (USEPA
2014). The comment period closed on January 22, 2015; no subsequent action has been
taken.

On September 30, 2015, the USEPA proposed to approve elements of the South Coast 2012
PM2.5 Plan and 2015 Supplement, which addresses Clean Air Act requirements for the 2006
PM2.5 NAAQS, and proposed to reclassify the area as a ‘serious’ nonattainment area for the

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Draft EIR