NAC445B.260. Monitoring systems: Components contracted for before September 11, 1974.

     1. Except as otherwise provided in subsection 2, an owner or operator who, before September 11, 1974, entered into a binding contractual obligation to purchase specific continuous monitoring system components shall comply with the following requirements:

     (a) Continuous monitoring systems for measuring opacity of emissions must be capable of measuring, with a confidence level of 95 percent, emission levels within ±20 percent of the mean value of the data obtained using the applicable reference method set forth in terms of the units of the emission standard. The calibration drift test and associated calculation procedures set forth in Performance Specification 1 in Appendix B of 40 C.F.R. Part 60 must be used for demonstrating compliance with this specification.

     (b) Continuous monitoring systems for measurement of nitrogen oxides or sulfur dioxide must be capable of measuring, with a confidence level of 95 percent, emission levels within ±20 percent of the mean value of the data obtained using the applicable reference method set forth in terms of the units of the emission standard. The calibration drift test, the relative accuracy test and associated operating and calculation procedures set forth in Performance Specification 2 in Appendix B of 40 C.F.R. Part 60 must be used for demonstrating compliance with this specification.

     2. Owners or operators of all continuous monitoring systems installed on an affected facility before October 6, 1975, are not required to conduct tests under paragraphs (a) and (b) of subsection 1 unless requested by the Director.

     3. All continuous monitoring systems referred to in subsection 1 must be upgraded or replaced, if necessary, with new continuous monitoring systems, and such improved systems must be demonstrated to comply with applicable performance specifications under NAC 445B.259 by September 11, 1979.

     [Environmental Comm’n, Air Quality Reg. §§ 2.17.3.2 & 2.17.3.3, eff. 12-4-76; A 12-4-77]—(NAC A by R151-06, 9-18-2006)