(a) The emission limits, operating limits and work practice standards specified in this subpart apply at all times, including periods of startup, shutdown or malfunction.

(b) At all times, you must operate and maintain your affected source, including associated air pollution control components and monitoring system components, in a manner consistent with safety and good air pollution control practices for minimizing emissions. Determination of whether acceptable operation and maintenance procedures are being used will be based on information available to the Administrator, which may include, but is not limited to, monitoring results, review of operation and maintenance procedures, review of operation and maintenance records, and inspection of the source.

(c) You must install, calibrate, maintain, and operate all monitoring system components according to §§63.8, 63.11935(b) and (c), and paragraphs (c)(1) and (2) of this section.

(1) Except for periods of monitoring system malfunctions, repairs associated with monitoring system malfunctions and required monitoring system quality assurance or quality control activities (including, as applicable, calibration checks and required zero and span adjustments), you must operate the continuous monitoring system at all times the affected source is operating. A monitoring system malfunction is any sudden, infrequent, not reasonably preventable failure of the monitoring system to provide data. Monitoring system failures that are caused in part by poor maintenance or careless operation are not malfunctions. You are required to complete monitoring system repairs in response to monitoring system malfunctions and to return the monitoring system to operation as expeditiously as practicable.

(2) You may not use data recorded during monitoring system malfunctions, repairs associated with monitoring system malfunctions, or required monitoring system quality assurance or control activities in calculations used to report emissions or operating levels. You must use all the data collected during all other required data collection periods in assessing the operation of the control device and associated control system. You must report any periods for which the monitoring system failed to collect required data.

(d) A deviation means any of the cases listed in paragraphs (d)(1) through (7) of this section.

(1) Any instance in which an affected source subject to this subpart, or an owner or operator of such a source, fails to meet any requirement or obligation established by this subpart, including, but not limited to, any emission limit, operating limit or work practice standard.

(2) When a performance test indicates that emissions of a pollutant in Table 1 or 2 to this subpart are exceeding the emission standard for the pollutant specified in Table 1 or 2 to this subpart.

(3) When a 3-hour block average from a continuous emissions monitor, as required by §63.11925(c)(1) through (3), exceeds an emission limit in Table 1 or 2 to this subpart.

(4) When the average value of a monitored operating parameter, based on the data averaging period for compliance specified in Table 5 to this subpart, does not meet the operating limit established in §63.11880(b).

(5) When an affected source discharges directly to the atmosphere from any of the sources specified in paragraphs (d)(5)(i) through (iv) of this section.

(i) A pressure relief device, as defined in §63.12005.

(ii) A bypass, as defined in §63.12005.

(iii) A closed vent system in vacuum service.

(iv) A closure device on a pressure vessel.

(6) Any instance in which the affected source subject to this subpart, or an owner or operator of such a source, fails to meet any term or condition specified in paragraph (d)(6)(i) or (ii) of this section.

(i) Any term or condition that is adopted to implement an applicable requirement in this subpart.

(ii) Any term or condition relating to compliance with this subpart that is included in the operating permit for any affected source required to obtain such a permit.

(7) Any failure to collect required data, except for periods of monitoring system malfunctions, repairs associated with monitoring system malfunctions, and required monitoring system quality assurance or quality control activities (including, as applicable, calibration checks and required zero and span adjustments).