(a) The level of the annual standard is 0.030 parts per million (ppm), not to be exceeded in a calendar year. The annual arithmetic mean shall be rounded to three decimal places (fractional parts equal to or greater than 0.0005 ppm shall be rounded up). (b) The level of the 24-hour standard is 0.14 parts per million (ppm), not to be exceeded more than once per calendar year. The 24-hour averages shall be determined from successive nonoverlapping 24-hour blocks starting at midnight each calendar day
(a) The regulations in this part provide for the establishment of comprehensive State air quality permitting systems consistent with the requirements of title V of the Clean Air Act (Act) (42 U.S.C. 7401 , et seq.). These regulations define the minimum elements required by the Act for State operating permit programs and the corresponding standards and procedures by which the Administrator will approve, oversee, and withdraw approval of State operating permit programs. (b) All sources subject to these
(a) The level of the 3-hour standard is 0.5 parts per million (ppm), not to be exceeded more than once per calendar year. The 3-hour averages shall be determined from successive nonoverlapping 3-hour blocks starting at midnight each calendar day and shall be rounded to 1 decimal place (fractional parts equal to or greater than 0.05 ppm shall be rounded up). (b) Sulfur oxides shall be measured in the ambient air as sulfur dioxide by the reference method described in appendix A of this part or by an
A. Definition. (1) In the following provisions, "Administrator" has the meaning set forth in §A(2) of this regulation: (a)40 CFR § 52.21(b)(3)(iii)(a), (17), (37)(i) and (iii), (43), (48)(ii), (50)(i), (51); (b)40 CFR § 52.21(g)(1),(2),(4),(5),and (6); (c)40 CFR § 52.21(i)(1)(x); (d)40 CFR § 52.21(l)(2); (e)40 CFR § 52.21(o)(3); (f)40 CFR § 52.21(p)(1) and (2); (g)40 CFR § 52.21(s); (h)40 CFR § 52.21(t); and (i)40 CFR § 52.21(u)(1)(3) and (4). (2) Term Defined. "Administrator" means the Administrator
A. The owner or operator of the following sources shall apply for and obtain a Part 70 permit unless exempted under §B of this regulation: (1) A major source; (2) A source, including an area source, subject to a standard, limitation, or other requirement under § 111 of the Clean Air Act; (3) A source, including an area source, subject to a standard or other requirement under § 112 of the Clean Air Act, except that a source is not required to obtain a Part 70 permit solely because it is subject to