NAC445B.239. Modification: Rate of emission.

     1. The rate of emission must be expressed in pounds per hour of any regulated air pollutant discharged into the atmosphere for which a standard is applicable. The Director shall use the following to determine the rate of emission:

     (a) Factors of emission as specified in the latest issue of Compilation of Air Pollutant Emission Factors, EPA Publication No. AP-42, or other factors of emission determined by the Director to be superior to those in that publication, in cases where the use of factors of emission demonstrates that the level of emission resulting from the physical or operational change will either clearly increase or clearly not increase; and

     (b) Material balances, data from continuous monitors, or manual tests for emission in cases where the use of factors of emission does not demonstrate to the Director’s satisfaction whether the level of emission resulting from the physical or operational change will either clearly increase or clearly not increase, or where an owner or operator demonstrates to the Director’s satisfaction that there are reasonable grounds to dispute the result obtained by the Director using factors of emission.

     2. When the rate of emission is based on results from manual tests for emission or systems for continuous observation, the procedures specified in Appendix C of 40 C.F.R. § 60 must be used to determine whether an increase in the rate of emission has occurred. Tests must be conducted under such conditions as the Director specifies to the owner or operator based on the representative performance of the facility. At least three valid tests must be conducted before and at least three after the physical or operational change. All operating parameters which may affect emissions must be held constant to the maximum feasible degree for each running of a test.

     [Environmental Comm’n, Air Quality Reg. §§ 2.14.2-2.14.2.2, eff. 12-4-76]—(NAC A 10-15-85; R 12-13-93, eff. 11-15-94; A 10-30-95)