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§63.9921. What are the installation, operation and maintenance requirements for my monitors? — Inbound Citations

40 C.F.R. § 63.9921

Cited by 5 regulations in release 2026-08-27.

Citations to §63.9921(a)

Citations to §63.9921(b)

Citations to §63.9921(b)(1)

  • (b) You must install, operate, and maintain each CPMS for a wet scrubber according to the requirements in paragraphs (b)(1) through (3) of this section.
    (1) Each CPMS must complete a minimum of one cycle of operation for each successive 15-minute period.
    (2) Each CPMS must have valid data for at least 95 percent of every averaging period.
    (3) Each CPMS must determine and record the hourly average of all recorded readings.

Citations to §63.9921(b)(2)

  • (b) You must install, operate, and maintain each CPMS for a wet scrubber according to the requirements in paragraphs (b)(1) through (3) of this section.
    (1) Each CPMS must complete a minimum of one cycle of operation for each successive 15-minute period.
    (2) Each CPMS must have valid data for at least 95 percent of every averaging period.
    (3) Each CPMS must determine and record the hourly average of all recorded readings.

Citations to §63.9921(b)(3)

  • (b) You must install, operate, and maintain each CPMS for a wet scrubber according to the requirements in paragraphs (b)(1) through (3) of this section.
    (1) Each CPMS must complete a minimum of one cycle of operation for each successive 15-minute period.
    (2) Each CPMS must have valid data for at least 95 percent of every averaging period.
    (3) Each CPMS must determine and record the hourly average of all recorded readings.