2024-15106. Clean Air Act Operating Permit Program; California; South Coast Air Quality Management District

Table 1—Air Quality Attainment Status

NAAQS pollutant/standard	Designation a	Classification	Basin/air quality management area
Annual NO 2 (1971 Standard)	A/U		Los-Angeles-South Coast Air Basin.
1-Hour NO 2 (2010 Standard)	A/U		Los Angeles County (part).
1-Hour NO 2 (2010 Standard)	A/U		Orange County.
1-Hour NO 2 (2010 Standard)	A/U		Riverside County (part).
1-Hour NO 2 (2010 Standard)	A/U		San Bernadino County (part).
CO (1971 Standard)	A/U		Los-Angeles-South Coast Air Basin Area.
Pb (2008 Standard)	NA		Los Angeles County-South Coast Air Basin.
1-Hour SO 2 (2010 Standard)	A/U		South Coast Air Basin.
24-Hour PM 10 (1987 Standard)	NA	Serious	Coachella Valley Planning Area.
24-Hour PM 10 (1987 Standard)	A/U		South Coast Air Basin.
Annual PM 2.5 (1997 Standard)	NA	Moderate	Los-Angeles-South Coast Air Basin.
24-Hour PM 2.5 (1997 Standard)	NA	Moderate	Los-Angeles-South Coast Air Basin.
24-Hour PM 2.5 (2006 Standard)	NA	Serious	Los-Angeles-South Coast Air Basin.
Annual PM 2.5 (2012 Standard)	NA	Serious	Los-Angeles-South Coast Air Basin.
1-Hour Ozone (1979 Standard) b	NA	Extreme	Los-Angeles-South Coast Air Basin.
1-Hour Ozone (1979 Standard) b	NA	Severe-17	Southeast Desert Modified Air Quality Management Area.
8-Hour Ozone (1997 Standard) c	NA	Extreme	Riverside County (Coachella Valley).
8-Hour Ozone (1997 Standard) c	NA	Extreme	Los-Angeles-South Coast Air Basin.
8-Hour Ozone (2008 Standard)	NA	Extreme	Los-Angeles-South Coast Air Basin.
8-Hour Ozone (2008 Standard)	NA	Severe-15	Riverside County (Coachella Valley).
8-Hour Ozone (2015 Standard)	NA	Extreme	Los-Angeles-South Coast Air Basin.
8-Hour Ozone (2015 Standard)	NA	Severe-15	Riverside County (Coachella Valley).
a  NA = Nonattainment; A/U = Attainment or Unclassified.
b  On August 3, 2005, the EPA revoked the 1979 1-hour ozone NAAQS; however, the EPA is retaining the listing of the designated areas for the revoked 1979 ozone NAAQS in 40 CFR part 81, for the sole purpose of identifying the anti-backsliding requirements that may apply to the areas at the time of revocation. 70 FR 44470 (August 3, 2005).
c  On March 6, 2015, the EPA revoked the 1997 8-hour ozone NAAQS; however, the EPA is retaining the listing of the designated areas for the revoked 1997 ozone NAAQS in 40 CFR part 81, for the sole purpose of identifying the anti-backsliding requirements that may apply to the areas at the time of revocation. 80 FR 12264 (March 6, 2015). On July 10, 2019, the Coachella Valley was reclassified to Extreme ozone nonattainment for the 1997 ozone NAAQS. 84 FR 32841 (July 10, 2019).

The emissions thresholds, above which a title V operating permit is required pursuant to 40 CFR 70.3(a), are shown in table 2.

Table 2—Title V Emissions Thresholds  ^a

Nonattainment designation/classification	VOC or NO X (tpy)	CO (tpy)	PM 10 (tpy)
Marginal	100	100	100
Moderate	100	100	100
Serious	50	50	70
Ozone transport region (other than Severe or Extreme)	50 (VOC only)
Severe	25
Extreme	10
a  40 CFR 70.2.

The emissions thresholds for PM_2.5, SO₂, and Pb are 100 tons per year (tpy) regardless of attainment classification. For hazardous air pollutants (HAPs), the title V threshold is 10 tpy for any individual HAP and 25 tpy for any combination of HAPs.

III. What are the requirements for approval of revisions to title V programs?

Pursuant to 40 CFR 70.4(i), either the EPA or the State may initiate a title V program revision “when the relevant Federal or State statutes or regulations are modified or supplemented.” It is the responsibility of the State to keep the EPA apprised of any proposed modifications to its basic statutory or regulatory authority or procedures. Revision of a State program shall be accomplished as follows:

(a) The State submits a modified program description, Attorney General's statement (if necessary for expanded or additional authority), or other documents as the EPA determines to be necessary. 40 CFR 70.4(i)(2)(i).

(b) After the EPA receives a proposed program revision, it will publish a notice of the proposed change in the Federal Register and provide for a public comment period of at least 30 days. 40 CFR 70.4(i)(2)(ii).

(c) The Administrator shall approve or disapprove program revisions based on the requirements of 40 CFR part 70 and the Act. 40 CFR 70.4(i)(2)(iii).

(d) The EPA must publish a notice of approval in the Federal Register for any substantial program revisions. 40 CFR 70.4(i)(2)(iv).

(e) Approval of nonsubstantial revisions may be given by a letter from the Administrator to the Governor or a designee. 40 CFR 70.4(i)(2)(iv).

(f) A program revision shall become effective upon the approval of the Administrator. 40 CFR 70.4(i)(2)(iv).

IV. What is the State's proposed title V program revision?

Table 3 lists the rules submitted as part of the SCAQMD's title V program revisions and the dates they were adopted by the District and submitted to the EPA by the California Air Resources Board (CARB), which is the governor's designee for California rule submittals.^[2]

Table 3—Submitted Rules

Rule #	Rule title	Adoption date	Submitted date a
3001	Title V Permits—Applicability	12/4/2020	2/25/2021
a  CARB transmitted the submittal to the EPA by a letter dated February 24, 2021.