40 CFR § 51.190
Ambient air quality monitoring requirements
June 9, 2020
The requirements for monitoring ambient air quality for purposes of the plan are located in subpart C of part 58 of this chapter.
[44 FR 27569, May 10, 1979]
The requirements for monitoring ambient air quality for purposes of the plan are located in subpart C of part 58 of this chapter.
[44 FR 27569, May 10, 1979]