§51.151. Significant harm levels.
40 C.F.R. § 51.151
Each plan for a Priority I region must include a contingency plan which must, as a minimum, provide for taking action necessary to prevent ambient pollutant concentrations at any location in such region from reaching the following levels:
Notes, amendments, and revision history
Amendments
[51 FR 40668, Nov. 7, 1986, as amended at 52 FR 24713, July 1, 1987]
Source
Source: 51 FR 40668, Nov. 7, 1986, unless otherwise noted.
Authority
Authority: 23 U.S.C. 101; 42 U.S.C. 7401-7671q.
Source
Source: 36 FR 22398, Nov. 25, 1971, unless otherwise noted.
Amendments
[51 FR 40668, Nov. 7, 1986, as amended at 52 FR 24713, July 1, 1987]