§ 51.151 Significant harm levels.  


Latest version.
  • 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:

    [51 FR 40668, Nov. 7, 1986, as amended at 52 FR 24713, July 1, 1987]

[51 FR 40668, Nov. 7, 1986, as amended at 52 FR 24713, July 1, 1987