Special requirements for major stationary sources in attainment or unclassified areas (PSD) - PSD prevention of significant deterioration - procedural adoption and revisions

Sep 4, 2026

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Special requirements apply to major stationary sources located in areas designated attainment or unclassified (PSD). Owners or operators must comply with prevention of significant deterioration (PSD) rules set forth in 567-Chapter 33. The text summarizes multiple EPA-approved regulatory revisions and rulemakings, including adoption by reference of federal PSD provisions at 40 CFR 52.21, updates to appendices and procedural requirements, recodification and effective date corrections, and modeling changes such as adopting AERMOD.

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Special requirements for major stationary sources

PSD compliance and prevention rules

EPA rulemakings and adoption by reference

Updates to references, effective dates, and air quality models

22 .4(455B) Special requirements for major stationary sources located in areas designated attainment or unclassified (PSD) . As applicable, the owner or operator of a stationary sourceshall comply with the rules for prevention of significant deterioration (PSD) as set forth in 567-Chapter 33. | EPA Rulemakings
CFR: 40 C .F .R . 52 .820(c)(44)(i)(ii)
FRM: 50 FR 37176 (9/12/85)
PRM: 49 FR 45761 (11/20/84)
State Submission: 7/18/84
State Proposal: 6/22/83
State Final: 7/17/84
APDB File: IA-19
Description: The EPA approved Chapter 22 regulations (preconstruction review procedures), with the exception of 3 subrules, 22 .5(4) g, i, and j, on emission offsets . | | | | --- | --- | --- | | CFR:
FRM:
PRM:
State Submission:
State Proposal:
State Final:
APDB File:
Description:
requirements and the | 40 C .F .R . 52 .820(c)(46)(i)(A)
52 FR 23981 (6/26/87)
None
3/9/87
12/3/86 (ARC 7188) 4/15/87
IA-26
This revision adopts by reference the EPA regulations 52.21 pertaining to PSD SIP regulation 51 .166(q)(2)(iv) on procedural requirements. | | | CFR: 40 C .F .R . 52 .820(c)(51)(i)(A)
FRM: 54 FR 33536 (8/15/89)
PRM: None
State Submission: 10/28/88
State Proposal: IAB 7/27/88 (ARC 9033)
State Final: IAB 11/16/88 (ARC 9454) (Effective 12/21/88)
APDB File: IA-27
Description: Revised the SIP to include the PM10 standards and definitions. It also redesignated
areas of Iowa to unclassifiable with the respect to particulate matter . | | | | CFR:
FRM:
PRM:
State Submission:
State Proposal:
State Final:
APDB File:
Description:
1986) and Supplement Water, Air and Waste | 40 C .F .R . 52 .820(c)(52)(i)(B)
55 FR 26690 (6/29/90)
None
5/7/90
IAB 11/15/89 (ARC 412A)
IAB 2/7/90 (ARC 658A) (Effective 3/14/90) IA-32
Amends 22 .4(1) to incorporate the EPA's guideline on Air Quality Models (Revised A (1987) , and recodified Chapters 20-29. The recodification changed the name from Management (900) to Environmental Protection Commission (567) . | | | CFR:
FRM:
PRM:
State Submission:
State Proposal:
State Final:
APDB File:
Description:
by the EPA on October | | 40 C .F .R . 52 .820(c)(53)(i)(A)
56 FR 5757 (2/13/91)
None
11/8/90 IAB 6/13/90
IAB 10/17/90 (Effective 11/21/90) IA-31
This revision adopts the maximum allowable increases for nitrogen dioxide revised 17, 1988. | | CFR: 40 C .F .R . 52 .820(c)(57)(i)(A)
FRM: 58 FR 27939 (5/12/93)
PRM: None
State Submission: 1/5/93
State Proposal: IAB 9/16/92 (ARC 3350A)
State Final: IAB 1/20/93 (ARC 3694A) (Effective 2/24/93)
APDB File: IA-37
Description: This revision updates the reference to the Federal PSD rule at 40 C .F .R . 52.21. | | | CFR: 40 C .F .R . 52 .820(c)(59)(i)(B) FRM: 59 FR 65717 (12/21/94) PRM: 59 FR 65744 (12/21/94) State Submission: 5/5/94 State Proposal: 10/13/93 State Final: Effective 4/20/94 (Published 3/16/94) APDB File: IA-46 Description: This revision adopted by reference 40 C .F .R . Subsection 52.21 as amended through July 21, 1993. | CFR: | 40 C .F .R . 52 .820(c)(64)(i)(D) | | --- | --- | | FRM: | 62 FR 55172 (10/23/97) | | PRM: | 61 FR 39375 (7/29/96) | | State Submission: | 2/27/96 | | State Proposal: | IAB 3/15/ 95 (ARC 5487A) | | State Final: | IAB 6/7/95 (ARC 5660A) (Effective 7/12/95) | | APDB File: | IA-47 | | Description: 40 C .F .R . 51. | This revision amended subrule 22 .4(1) by updating the reference to Appendix W of | | CFR: | 40 C .F .R . 52.820 (c) | | FRM: | 64 FR 17548 (4/12/99) and 65 FR 32030 (5/22/00) (correction) | | PRM: | 64 FR 17592 (4/12/99) | | State Submission: | 8/12/98 | | State Proposal: | 1/14/98 | | State Final: | IAC 4/8/98 | | APDB File: | IA-71 | | Description: | This revision corrects dates associated with the C .F .R . citation and reflects the | | most recent revisions | to the regulation. | | CFR: 40 C .F .R . 52.820 (c) | | | FRM: 6

FAQs

Who must comply with the PSD prevention of significant deterioration requirements in these areas?

The owner or operator of a stationary source subject to PSD must comply with the prevention of significant deterioration (PSD) rules referenced in 567-Chapter 33.

What federal PSD framework is adopted by reference in the revisions?

The revisions adopt by reference the EPA regulations at 40 CFR 52.21, including procedural requirements referenced in 51.166(q)(2)(iv).

What modeling update is described in the rule revisions?

One revision includes the promulgation of AERMOD, which replaces the Industrial Source Complex (ISC3) model.

Sep 4, 2026

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