T = the transfer efficiency for each type of application equipment used at a coating operation (fraction)
Tavg = the volume weighted average transfer efficiency for a coating operation (fraction)
Vs = the proportion of solids in each coating, as received (fraction by volume)
Wo = the proportion of VOCs in each coating, as received (fraction by weight)
NR 440.72(3)(a)(a) Each owner or operator of any affected facility which is subject to the requirements of this section shall comply with the emission limitations set forth in this subsection on and after the date on which the initial performance test, required by s. NR 440.08 and sub. (4) is completed, but not later than 60 days after achieving the maximum production rate at which the affected facility will be operated, or 180 days after the initial startup, which ever date comes first. No affected facility may cause the discharge into the atmosphere in excess of: NR 440.72(3)(a)1.1. 1.5 kilograms of VOCs per liter of coating solids applied from prime coating of plastic parts for business machines. NR 440.72(3)(a)2.2. 1.5 kilograms of VOCs per liter of coating solids applied from color coating of plastic parts for business machines. NR 440.72(3)(a)3.3. 2.3 kilograms of VOCs per liter of coating solids applied from texture coating of plastic parts for business machines. NR 440.72(3)(a)4.4. 2.3 kilograms of VOCs per liter of coatings solids applied from touch-up coating of plastic parts for business machines. NR 440.72(3)(b)(b) All VOC emissions that are caused by coating applied in each affected facility, regardless of the actual point of discharge of emissions into the atmosphere, shall be included in determining compliance with the emission limits in par. (a). NR 440.72(4)(4) Performance tests and compliance provisions. NR 440.72(4)(b)(b) The owner or operator of an affected facility shall conduct an initial performance test as required under s. NR 440.08 (1) and thereafter a performance test each nominal 1-month period for each affected facility according to the procedures in this subsection. NR 440.72(4)(b)1.1. The owner or operator shall determine the composition of coatings by analysis of each coating, as received, using Method 24 of Appendix A, 40 CFR part 60, incorporated by reference in s. NR 440.17 (1), from data that have been determined by the coating manufacturer using Method 24, or by other methods approved by the administrator. NR 440.72(4)(b)2.2. The owner or operator shall determine the volume of coating and the mass of VOC used for dilution of coatings from company records during each nominal 1-month period. If a common coating distribution system serves more than one affected facility or serves both affected and nonaffected spray booths, the owner or operator shall estimate the volume of coatings used at each facility by using procedures approved by the department. NR 440.72(4)(b)2.a.a. The owner or operator shall calculate the volume-weighted average mass of VOCs in coatings emitted per unit volume of coating solids applied (N) at each coating operation (i.e., for each type of coating used, prime, color, texture, or touch-up) during each nominal 1-month period for each affected facility. Each 1-month calculation is considered a performance test. Except as provided in subd. 2. c., N will be determined by the following procedures: 1) Calculate the mass of VOCs used (Mo+ Md) for each coating operation during each nominal 1-month period for each affected facility by the following equation: where n is the number of coatings of each type used during each nominal 1-month period and m is the number of different diluent VOCs used during each nominal 1-month period. (∑Ldj Ddj will be 0 if no VOCs are added to the coatings, as received.)
2) Calculate the total volume of coating solids consumed (Ls) in each nominal 1-month period for each coating operation for each affected facility by the following equation: where n is the number of coatings of each type used during each nominal 1-month period.
3) Select the appropriate transfer efficiency (T) from Table 1 for each type of coating applications equipment used at each coating operation. If the owner or operator can demonstrate to the satisfaction of the administrator that transfer efficiencies other than those shown are appropriate, the administrator may approve their use on a case-by-case basis. Transfer efficiency values for application methods not listed below may be approved by the administrator on a case-by-case basis. An owner or operator shall submit sufficient data for the administrator to judge the validity of the transfer efficiency claims.
4) Where more than one application method is used within a single coating operation, the owner or operator shall determine the volume of each coating applied by each method through a means acceptable to the department and compute the volume-weighted average transfer efficiency by the following equation:
where n is the number of coatings of each type used and p is the number of application methods used
5) Calculate the volume-weighted average mass of VOCs emitted per unit volume of coating solids applied (N) during each nominal 1-month period for each coating operation for each affected facility by the following equation: (Tavg = T when only one type of coating operation occurs).