N.M. Code R. § 20.2.40.112 – Monitoring

A. The owner or operator of an existing sulfuric acid production unit shall not permit, cause, suffer or allow operation of the sulfuric acid production unit without maintaining in good operating condition a monitor which continuously measures and records the sulfur dioxide concentration in the gases within the stack from which the gases are emitted to the atmosphere. The sampling point for monitoring emissions and the method for determining the volumetric flow rate of the gases shall be approved by the Department. Instruments and sampling systems installed and used pursuant to this section shall be calibrated in accordance with the methods prescribed by the manufacturer's recommended zero adjustment and calibration check procedures at least once every 24 hours of operation, unless the manufacturer specifies or recommends more frequent calibration checks. The owner or operator of a sulfuric acid production unit shall retain for a period of two years all raw data and quality assurance measurements and procedures. This section is applicable to existing sulfuric acid production units after December 31, 1980.
B. Instruments and sampling systems installed and used pursuant to subsection A of 20.2.40.112 NMAC shall be installed, operated and maintained in accordance with the performance specifications and other requirements set forth by the US EPA in 40 CFR Section 60.84. The continuous emission monitoring system shall complete a minimum of one cycle of operation (sampling, analyzing, and data recording) for each successive 15-minute period. In the event that significant repair work is performed on the monitoring system, the owner or operator of a sulfuric acid production unit shall demonstrate to the Department that the system continues to meet applicable performance specifications. The Department may require the owner or operator to conduct performance tests as specified at 40 CFR Part 60, Appendix B at any time that the Department determines that such a test is necessary to verify the performance of the monitoring system. An alternative means of verifying the performance of the monitoring system may be used if approved by the Department and the US EPA. The Department may also perform independent audits on the continuous monitoring system using the method referenced above, or other applicable methods.
[11/30/95; 20.2.40.112 NMAC - Rn, 20 NMAC 2.40.112 10/31/02]