Where this text comes from
- Citation
- 40 CFR Part 60, Subpart Da
- Official title
- Subpart Da—Standards of Performance for Electric Utility Steam Generating Units
- Text as of
- eCFR current through 2026-10-28, retrieved 2026-10-30
- Latest amendment
- 2016-10-31
- Source note
- 72 FR 32722, June 13, 2007, unless otherwise noted.
Headings and quoted sections on this page are copied from the eCFR text of Subpart Da without changes. AirPermitHub checks eCFR every week and reviews any change before publishing it, so this page can trail eCFR by a few days. eCFR is maintained by the Office of the Federal Register and the Government Publishing Office. It is not an official legal edition of the CFR, and it does not show how an agency has applied the rule in a permit.
Where to look in Subpart Da
Sections sorted by the words in their eCFR headings. Read the full section before relying on it; requirements often sit in more than one place.
Who the subpart covers, in the rule's own words
The sections that set out what the subpart applies to, quoted in full from eCFR. Dates, sizes, and other figures are the rule's, not AirPermitHub's.
§ 60.40Da Applicability and designation of affected facility.
Open in eCFR(a) Except as specified in paragraph (e) of this section, the affected facility to which this subpart applies is each electric utility steam generating unit:
(1) That is capable of combusting more than 73 megawatts (MW) (250 million British thermal units per hour (MMBtu/hr)) heat input of fossil fuel (either alone or in combination with any other fuel); and
(2) For which construction, modification, or reconstruction is commenced after September 18, 1978.
(b) An IGCC electric utility steam generating unit (both the stationary combustion turbine and any associated duct burners) is subject to this part and is not subject to subpart GG or KKKK of this part if both of the conditions specified in paragraphs (b)(1) and (2) of this section are met.
(1) The IGCC electric utility steam generating unit is capable of combusting more than 73 MW (250 MMBtu/h) heat input of fossil fuel (either alone or in combination with any other fuel) in the combustion turbine engine and associated heat recovery steam generator; and
(2) The IGCC electric utility steam generating unit commenced construction, modification, or reconstruction after February 28, 2005.
(c) Any change to an existing fossil-fuel-fired steam generating unit to accommodate the use of combustible materials, other than fossil fuels, shall not bring that unit under the applicability of this subpart.
(d) Any change to an existing steam generating unit originally designed to fire gaseous or liquid fossil fuels, to accommodate the use of any other fuel (fossil or nonfossil) shall not bring that unit under the applicability of this subpart.
Show the rest of § 60.40Da (4 more paragraphs)Hide the rest of § 60.40Da
(e) Applicability of this subpart to an electric utility combined cycle gas turbine other than an IGCC electric utility steam generating unit is as specified in paragraphs (e)(1) through (3) of this section.
(1) Affected facilities (i.e. heat recovery steam generators used with duct burners) associated with a stationary combustion turbine that are capable of combusting more than 73 MW (250 MMBtu/h) heat input of fossil fuel are subject to this subpart except in cases when the affected facility (i.e. heat recovery steam generator) meets the applicability requirements of and is subject to subpart KKKK of this part.
(2) For heat recovery steam generators use with duct burners subject to this subpart, only emissions resulting from the combustion of fuels in the steam generating unit (i.e. duct burners) are subject to the standards under this subpart. (The emissions resulting from the combustion of fuels in the stationary combustion turbine engine are subject to subpart GG or KKKK, as applicable, of this part.)
(3) Any affected facility that meets the applicability requirements and is subject to subpart Eb or subpart CCCC of this part is not subject to the emission standards under subpart Da.
[72 FR 32722, June 13, 2007, as amended at 74 FR 5078, Jan. 28, 2009; 77 FR 9448, Feb. 16, 2012]
Every section in Subpart Da
12 sections, in eCFR order. Each link opens the official text.
- § 60.40DaApplicability and designation of affected facility.Amended 2016-10-31
- § 60.41DaDefinitions.Amended 2016-10-31
- § 60.42DaStandards for particulate matter (PM).Amended 2016-10-31
- § 60.43DaStandards for sulfur dioxide (SO2).Amended 2016-10-31
- § 60.44DaStandards for nitrogen oxides (NO2).Amended 2016-10-31
- § 60.45DaAlternative standards for combined nitrogen oxides (NOX) and carbon monoxide (CO).Amended 2016-10-31
- § 60.46Da[Reserved]Amended 2016-10-31
- § 60.47DaCommercial demonstration permit.Amended 2016-10-31
- § 60.48DaCompliance provisions.Amended 2016-10-31
- § 60.49DaEmission monitoring.Amended 2016-10-31
- § 60.50DaCompliance determination procedures and methods.Amended 2016-10-31
- § 60.51DaReporting requirements.Amended 2016-10-31
- § 60.52DaRecordkeeping requirements.Amended 2016-10-31
Amendment history
Dates on which eCFR records a change to any section of Subpart Da, newest first.
- 2016-10-31
To read the rulemakings behind these dates, search the Federal Register for Subpart Da. New EPA air rules and proposals also appear in the Federal Air Rule Tracker.
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