Cc is the concentration of organic compounds as carbon in the vent gas, as determined by Method 25 or Method 25A in 40 CFR part 60, Appendix A, incorporated by reference in s. NR 484.04 (13), parts per million by volume (ppmv), dry basis

Qsd is the volumetric flow rate of gases entering or exiting the add-on control device, as determined by Method 2, 2A, 2C, 2D, 2F or 2G in 40 CFR part 60, Appendix A, incorporated by reference in s. NR 484.04 (13), dry standard cubic meters/hour (dscm/h)

NR 465.38(7)(f)(f) Determine the emission destruction or removal efficiency of the add-on control device as the average of the efficiencies determined in the 3 test runs and calculated in Equation 2 of this subsection.

NR 465.38(8)(8) How do i establish the emission capture system and add-on control device operating limits during the performance test? During the performance test required by sub. (1) and described in subs. (5), (6) and (7), you shall establish the operating limits required by s. NR 465.33 (3) according to this subsection, unless you have received approval for alternative monitoring and operating limits under s. NR 460.07 (6) as specified in s. NR 465.33 (3).

NR 465.38(8)(a)1.1. During the performance test, you shall monitor and record the combustion temperature at least once every 15 minutes during each of the 3 test runs. You shall monitor the temperature in the firebox of the thermal oxidizer or immediately downstream of the firebox before any substantial heat exchange occurs.

NR 465.38(8)(a)2.2. Use the data collected during the performance test to calculate and record the average combustion temperature maintained during the performance test. This average combustion temperature shall be the minimum operating limit for your thermal oxidizer.

NR 465.38(8)(b)(b) Catalytic oxidizers. If your add-on control device is a catalytic oxidizer, establish the operating limits according to either subds. 1. and 2. or subds. 3. and 4.

NR 465.38(8)(b)1.1. During the performance test, you shall monitor and record the temperature just before the catalyst bed and the temperature difference across the catalyst bed at least once every 15 minutes during each of the 3 test runs.

NR 465.38(8)(b)2.2. Use the data collected during the performance test to calculate and record the average temperature just before the catalyst bed and the average temperature difference across the catalyst bed maintained during the performance test. The average temperature just before the catalyst bed and the average temperature difference across the catalyst bed shall be the minimum operating limits for your catalytic oxidizer.

NR 465.38(8)(b)3.3. You shall monitor the temperature at the inlet to the catalyst bed and implement a site-specific inspection and maintenance plan for your catalytic oxidizer as specified in subd. 4. During the performance test, you shall monitor and record the temperature just before the catalyst bed at least once every 15 minutes during each of the 3 test runs. Use the data collected during the performance test to calculate and record the average temperature just before the catalyst bed during the performance test. This average temperature shall be the minimum operating limit for your catalytic oxidizer.

NR 465.38(8)(b)4.4. You shall develop and implement an inspection and maintenance plan for your catalytic oxidizers for which you elect to monitor according to subd. 3. The plan shall address, at a minimum, the elements specified in subd. 4. a. to c.

NR 465.38(8)(b)4.a.a. Annual sampling and analysis of the catalyst conversion efficiency following the manufacturer’s or catalyst supplier’s recommended procedures. If problems are found during the catalyst activity test, you shall replace the catalyst bed or take other corrective action consistent with the manufacturer’s recommendations.

NR 465.38(8)(b)4.b.b. Monthly external inspection of the catalytic oxidizer system, including the burner assembly and fuel supply lines for problems and, as necessary, adjustment of the equipment to assure proper air-to-fuel mixtures.

NR 465.38(8)(b)4.c.c. Annual internal inspection of the catalyst bed to check for channeling, abrasion and settling. If problems are found during the annual internal inspection of the catalyst, you shall replace the catalyst bed or take other corrective action consistent with the manufacturer’s recommendations. If the catalyst bed is replaced and is not of like or better kind and quality as the old catalyst, then you shall conduct a new performance test to determine destruction efficiency according to sub. (7). If a catalyst bed is replaced and the replacement catalyst is of like or better kind and quality as the old catalyst, then a new performance test to determine destruction efficiency is not required and you may continue to use the previously established operating limits for that catalytic oxidizer.

NR 465.38(8)(c)(c) Regenerative carbon adsorbers. If your add-on control device is a regenerative carbon adsorber, establish the operating limits according to subds. 1. and 2.

NR 465.38(8)(c)1.1. You shall monitor and record the total regeneration desorbing gas mass flow for each regeneration cycle, and the carbon bed temperature after each carbon bed regeneration and cooling cycle for the regeneration cycle either immediately preceding or immediately following the performance test.

NR 465.38(8)(c)2.2. The operating limits for your regenerative carbon adsorber shall be the minimum total desorbing gas mass flow recorded during the regeneration cycle and the maximum carbon bed temperature recorded after the cooling cycle.