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4.1 – Air Quality Draft Environmental Impact Report February 2021 14800 W. Schulte Road Logistics Center 4.1-20 is designated as “unclassified” or “unclassifiable.” The designation of “unclassifiable/attainment” means that the area meets the standard or is expected to be meet the standard despite a lack of monitoring data. Areas that achieve the standards after a nonattainment designation are re-designated as maintenance areas and must have approved Maintenance Plans to ensure continued attainment of the standards. The California Clean Air Act, like its federal counterpart, calls for the designation of areas as “attainment” or “nonattainment,” but based on the CAAQS rather than the NAAQS. Table 4.1-2 depicts the current attainment status of the Project site with respect to the NAAQS and CAAQS, as well as the attainment classifications for the criteria pollutants. Table 4.1-2. San Joaquin Valley Air Basin Attainment Status Pollutant Designation/Classification National Designation California Designation Ozone (O3) – 1-hour No national standard1 Nonattainment/severe Ozone (O3) – 8-hour Nonattainment/extreme2 Nonattainment Nitrogen dioxide (NO2) Unclassifiable/attainment Attainment Carbon monoxide (CO) Unclassifiable/attainment Attainment Sulfur dioxide (SO2) Unclassifiable/attainment Attainment Coarse particulate matter (PM10) Attainment (Maintenance)3 Nonattainment Fine particulate matter (PM2.5) Nonattainment4 Nonattainment Lead5 Unclassifiable/attainment Attainment Sulfates (SO4) No national standard Attainment Hydrogen sulfide (H2S) No national standard Unclassified Vinyl chloride5 No national standard No designation Visibility-reducing particles No national standard Unclassified Sources: SJVAPCD 2020c; EPA 2020 (national); CARB 2021 (California). Notes: Attainment = meets the standards; Attainment (maintenance) = achieve the standards after a nonattainment designation; Nonattainment = does not meet the standards; Unclassified or unclassifiable = insufficient data to classify; Unclassifiable/a ttainment = meets the standard or is expected to be meet the standard despite a lack of monitoring data. 1 Effective June 15, 2005, the EPA revoked the national 1-hour ozone standard, including associated designations and classifications. EPA had previously classified the SJVAB as extreme nonattainment for this standard. The EPA approved the 2004 Extreme Ozone Attainment Demonstration Plan (SJVAPCD 2004) on March 8, 2010 (effective April 7, 2010). Many applicable requirements for extreme 1-hour ozone nonattainment areas continue to apply to the SJVAB. 2 Although San Joaquin Valley was initially classified as serious nonattainment for the 1997 8-hour ozone standard, EPA approved San Joaquin Valley reclassification to extreme nonattainment in the Federal Register on May 5, 2010 (effective June 4, 2010). 3 On September 25, 2008, the EPA re-designated San Joaquin Valley to attainment for the PM10 NAAQS and approved the PM10 Maintenance Plan. 4 San Joaquin Valley is designated nonattainment for the 1997 PM2.5 NAAQS. The EPA designated San Joaquin Valley as nonattainment for the 2006 PM2.5 NAAQS on November 13, 2009 (effective December 14, 2009). 5 CARB has identified lead and vinyl chloride as toxic air contaminants with no threshold level of exposure for adverse health effects determined. In summary, the EPA has designated the SJVAB as a nonattainment area for the nat ional 8 -hour O3 standard, and CARB has designated the SJVAB as a nonattainment area for the California 1 -hour and 8-hour O 3 standards. The SJVAB has been designated as a nonattainment area for the California 24 -hour and annual PM10 standards, a nonattainme nt area for the national 24 -hour and annual PM 2.5 standards, and as a nonattainment area for the California annual PM 2.5 standard. The SJVAB is designated as unclassified or attainment for all other criteria air pollutants.