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§ 63.7945 What are my monitoring installation, operation, and maintenance requirements?
(a) Each CPMS must meet the requirements in paragraphs (a)(1) through (4) of this section.
(1) Complete a minimum of one cycle of operation for each successive 15-minute period.
(2) To calculate a valid hourly value, you must have at least three of four equally spaced data values (or at least two, if that condition is included to allow for periodic calibration checks) for that hour from a CPMS that is not out of control according to the monitoring plan referenced in § 63.7935.