Administrative Rules of Montana › Department 17 - ENVIRONMENTAL QUALITY › Chapter 17.8 - AIR QUALITY › Subchapter 17.8.15 - Compliance Assurance Monitoring › Rule 17.8.1505 - PERFORMANCE CRITERIA AND EVALUATION FACTORS FOR MONITORING DESIGN

Current through Register Vol. 13, July 5, 2024
(1) The owner or operator shall design the
				monitoring to meet the following performance criteria:
(a) specifications that provide for obtaining
				data that are representative of the emissions or parameters being monitored
				(such as detector location and installation specifications, if
				applicable).
(b) for new or
				modified monitoring equipment, verification procedures to confirm the
				operational status of the monitoring prior to the date by which the owner or
				operator must conduct monitoring under this subchapter as specified in ARM
				17.8.1511(1). The
				owner or operator shall consider the monitoring equipment manufacturer's
				requirements or recommendations for installation, calibration, and start-up
				operation.
(c) quality assurance
				and control practices that are adequate to ensure the continuing validity of
				the data. The owner or operator shall consider manufacturer recommendations or
				requirements applicable to the monitoring in developing appropriate quality
				assurance and control practices.
(d) specifications for the frequency of
				conducting the monitoring, the data collection procedures that will be used
				(for example, computerized data acquisition and handling, alarm sensor, or
				manual log entries based on gauge readings), and, if applicable, the period
				over which discrete data points will be averaged for the purpose of determining
				whether an excursion or exceedance has occurred.
(i) At a minimum, the owner or operator shall
				design the period over which data are obtained and, if applicable, averaged
				consistent with the characteristics and typical variability of the
				pollutant-specific emissions unit (including the control device and associated
				capture system). Such intervals shall be commensurate with the time period over
				which a change in control device performance that would require actions by the
				owner or operator to return operations within normal ranges or designated
				conditions is likely to be observed.
(ii) For all pollutant-specific emissions
				units with the potential to emit, calculated including the effect of control
				devices, the applicable regulated air pollutant in an amount equal to or
				greater than 100% of the amount, in tons per year, required for a source to be
				classified as a major source, for each parameter monitored, the owner or
				operator shall collect four or more data values equally spaced over each hour
				and average the values, as applicable, over the applicable averaging period as
				determined in accordance with (1) (d) (i) above. The department may approve a
				reduced data collection frequency, if appropriate, based on information
				presented by the owner or operator concerning the data collection mechanisms
				available for a particular parameter for the particular pollutant-specific
				emissions unit (for example, integrated raw material or fuel analysis data,
				noninstrumental measurement of waste feed rate or visible emissions, use of a
				portable analyzer or an alarm sensor).
(iii) For other pollutant-specific emissions
				units, the frequency of data collection may be less than the frequency
				specified in (1) (d) (ii) above, but the monitoring shall include some data
				collection at least once per 24-hour period (for example, a daily inspection of
				a carbon adsorber operation in conjunction with a weekly or monthly check of
				emissions with a portable analyzer).