NR 440.74(3)(c)2.b.b. Install, operate and maintain a cover on each piece of affected coating mix preparation equipment and vent VOC emissions to a VOC control device.

NR 440.74(3)(c)3.3. For an affected facility that uses at least 95 Mg but less than 130 Mg of VOC per 12-month period, the owner or operator shall either:

NR 440.74(3)(c)3.a.a. Install, operate and maintain a cover on each piece of affected coating mix preparation equipment; or

NR 440.74(3)(c)3.b.b. Install, operate and maintain a cover on each piece of affected coating mix preparation equipment and vent VOC emissions to a VOC control device.

NR 440.74(4)(a)(a) To demonstrate compliance with the emission reduction standard for coating operations specified in sub. (3) (b) 1., the owner or operator of the affected facility shall use one of the following methods.

NR 440.74(4)(a)1.1. For coating operations not using carbon adsorption beds with individual exhausts the following gaseous emission test method is applicable when the emissions from any affected coating operation are controlled by a control device other than a fixed-bed carbon adsorption system with individual exhaust stacks for each adsorber vessel. The owner or operator using this method shall comply with the following procedures:

NR 440.74(4)(a)1.a.a. Construct the vapor capture system and control device so that all gaseous volumetric flow rates and total VOC emissions can be accurately determined by the applicable test methods and procedures specified in sub. (6) (b) to (g);

NR 440.74(4)(a)1.b.b. Determine capture efficiency from the coating operation by capturing, venting and measuring all VOC emissions from the coating operation. During a performance test, the owner or operator of an affected coating operation located in an area with other sources of VOC shall isolate the coating operation emissions from all other sources of VOC by one of the following methods:

1) Build a temporary enclosure, as defined in sub. (2) (a) and conforming to the requirements of par. (b) 1., around the affected coating operation. The temporary enclosure shall be constructed and ventilated, through stacks suitable for testing, so that it has minimal impact on performance of the capture system; or

2) Shut down all other sources of VOC and continue to exhaust fugitive emissions from the affected coating operation through any building ventilation system and other room exhausts such as those on drying ovens. All such ventilation air shall be vented through stacks suitable for testing because the VOC content in each shall be determined.

NR 440.74(4)(a)1.c.c. Operate the emission control device with all emission sources connected and operating.

NR 440.74(4)(a)1.f.f. For each affected coating operation subject to sub. (3) (b) 1. (emission reduction standard for coating operations), compliance is demonstrated if the product of (E) × (F) is equal to or greater than 0.90.

NR 440.74(4)(a)2.2. For coating operations using carbon adsorption beds with individual exhausts the following gaseous emission test method is applicable when emissions from any affected coating operation are controlled by a fixed-bed carbon adsorption system with individual exhaust stacks for each adsorber vessel. The owner or operator using this method shall comply with the following procedures:

NR 440.74(4)(a)2.a.a. Construct the vapor capture system and control device so that each volumetric flow rate and the total VOC emissions can be accurately determined by the applicable test methods and procedures specified in sub. (6) (b) to (g);

NR 440.74(4)(a)2.b.b. Assure that all VOC emissions from the coating operation are segregated from other VOC sources and that the emissions can be captured for measurement, as described in sub. (4) (a) 1. b. 1) and 2);

NR 440.74(4)(a)2.c.c. Operate the emission control device with all emission sources connected and operating;

NR 440.74(4)(a)2.d.d. Determine the efficiency (Hv) of each individual adsorber vessel (v) using Equation 3:

NR 440.74(4)(a)2.e.e. Determine the efficiency of the carbon adsorption system (Hsys) by computing the average efficiency of the adsorber vessels as weighted by the volumetric flow rate (Qhv) of each individual adsorber vessel (v) using Equation 4:

NR 440.74(4)(a)2.g.g. For each affected coating operation subject to sub. (3) (b) 1. (emission reduction standard for coating operations), compliance is demonstrated if the product of (Hsys) × (F) is equal to or greater than 0.90.

NR 440.74(4)(a)3.3. The monthly liquid material balance method can be used only when a VOC recovery device controls only those emissions from one affected coating operation. It may not be used if the VOC recovery device controls emissions from any other VOC emission sources. When demonstrating compliance by this method, s. NR 440.08 (6) does not apply. The owner or operator using this method shall comply with the following procedures to determine the VOC emission reduction for each nominal 1-month period:

NR 440.74(4)(a)3.a.a. Measure the amount of coating applied at the coating applicator. This quantity shall be determined at a time and location in the process after all ingredients, including any dilution solvent, have been added to the coating or appropriate adjustments shall be made to account for any ingredients added after the amount of coating has been determined: