52.2372—Approval status.
(a)
With the exceptions set forth in this subpart, the Administrator approves Vermont's plan as identified in § 52.2370 for the attainment and maintenance of the national standards under section 110 of the Clean Air Act. Furthermore, the Administrator finds the plans satisfy all requirements of Part D, Title I, of the Clean Air Act, as amended in 1977, except as noted below. In addition, continued satisfaction of the requirements of Part D for the ozone portion of the SIP depends on the adoption and submittal of RACT requirements by July 1, 1980 for the sources covered by CTGs issued between January, 1978 and January, 1979 and adoption and submittal by each subsequent January of additional RACT requirements for sources covered by CTGs issued by the previous January.
(b)
(1)
Insofar as the Prevention of Significant Deterioration (PSD) provisions found in this subpart apply to stationary sources of greenhouse gas (GHGs) emissions, the Administrator approves that application only to the extent that GHGs are “subject to regulation”, as provided in this paragraph (b), and the Administrator takes no action on that application to the extent that GHGs are not “subject to regulation.”
(i)
The stationary source is a new major stationary source for a regulated NSR pollutant that is not GHGs, and also will emit or will have the potential to emit 75,000 tpy CO2 e or more; or
(ii)
The stationary source is an existing major stationary source for a regulated NSR pollutant that is not GHGs, and also will have an emissions increase of a regulated NSR pollutant, and an emissions increase of 75,000 tpy CO2 e or more; and,
(3)
Beginning July 1, 2011, in addition to the provisions in paragraph (b)(2) of this section, the pollutant GHGs shall also be subject to regulation:
(ii)
At an existing stationary source that emits or has the potential to emit 100,000 tpy CO2 e, when such stationary source undertakes a physical change or change in the method of operation that will result in an emissions increase of 75,000 tpy CO2 e or more.
(i)
The term greenhouse gas shall mean the air pollutant defined in 40 CFR 86.1818-12(a) as the aggregate group of six greenhouse gases: Carbon dioxide, nitrous oxide, methane, hydrofluorocarbons, perfluorocarbons, and sulfur hexafluoride.
(ii)
The term tpy CO2 equivalent emissions (CO2 e) shall represent an amount of GHGs emitted, and shall be computed as follows:
(A)
Multiplying the mass amount of emissions (tpy), for each of the six greenhouse gases in the pollutant GHGs, by the gas's associated global warming potential published at Table A-1 to subpart A of 40 CFR part 98 —Global Warming Potentials.
(B)
Sum the resultant value from paragraph (b)(4)(ii)(A) of this section for each gas to compute a tpy CO2 e.
(iii)
The term emissions increase shall mean that both a significant emissions increase (as calculated using the procedures in the definitions for “actual emissions” and “allowable emissions” under section 5-101 of Chapter 5, subchapter I of Vermont's Air Pollution Control Environmental Protection regulations) and a significant net emissions increase (as defined in the definitions for “significant” under section 5-101 of Chapter 5, subchapter I of Vermont's Air Pollution Control Environmental Protection regulations) occur. For the pollutant GHGs, an emissions increase shall be based on tpy CO2 e, and shall be calculated assuming the pollutant GHGs is a regulated NSR pollutant, and “significant” is defined as 75,000 tpy CO2 e instead of applying the value in the definition of “major modification” under section 5-101 of Chapter 5, subchapter I of Vermont's Air Pollution Control Environmental Protection regulations.