NR 440.65(2)(b)6. 6. “Cfk” means the concentration of VOC in each gas stream (k) for the time period which is not directed to an emission control device, in parts per million by volume.

NR 440.65(2)(b)7. 7. “G” means the weighted average mass of VOC per mass of ink solids applied, in kilograms per kilogram.

NR 440.65(2)(b)8. 8. “Mci” means the total mass of each dilution solvent (j) added at the print line in the time period determined from plant records, in kilograms.

NR 440.65(2)(b)10. 10. “Qaj” means the volumetric flow rate of each effluent gas stream (j) exiting the emission control device, in standard cubic meters per hour.

NR 440.65(2)(b)11. 11. “Qbi” means the volumetric flow rate of each effluent gas stream (i) entering the emission control device, in standard cubic meters per hour.

NR 440.65(2)(b)12. 12. “Qfk” means the volumetric flow rate of each effluent gas stream (k) not directed to an emission control device, in standard cubic meters per hour.

NR 440.65(2)(b)13. 13. “E” means the VOC emission reduction efficiency (as a fraction) of the emission control device during performance testing.

NR 440.65(2)(b)14. 14. “F” means the VOC emission capture efficiency (as a fraction) of the vapor capture system during performance testing.

NR 440.65(2)(b)15. 15. “Woi” means the weight fraction of VOC in each ink (i) used in the time period as determined from Method 24 of 40 CFR part 60, Appendix A, incorporated by reference in s. NR 440.17 (1), manufacturer’s formulation data, or plant blending records, in kilograms per kilogram.

NR 440.65(2)(b)16. 16. “Wxi” means the weight fraction of solids in each ink (i) used in the time period as determined from Method 24 of 40 CFR part 60, Appendix A, incorporated by reference in s. NR 440.17 (1), manufacturer’s formulation data, or plant blending records, in kilograms per kilogram.

NR 440.65(2)(b)17. 17. “Woj” means the weight fraction of VOC in each dilution solvent (j) added at the print line in the time period determined from Method 24 of 40 CFR part 60, Appendix A, incorporated by reference in s. NR 440.17 (1), manufacturer’s formulation data, or plant blending records, in kilograms per kilogram.

NR 440.65(3) (3) Standard for volatile organic compounds.

NR 440.65(3)(a) (a) On and after the date on which the performance test required by s. NR 440.08 has been completed each owner or operator subject to this section shall either:

NR 440.65(3)(a)1. 1. Use inks with a weighted average VOC content less than 1.0 kilogram VOC per kilogram ink solids at each affected facility, or

NR 440.65(3)(a)2. 2. Reduce VOC emissions to the atmosphere by 85% from each affected facility.

NR 440.65(4) (4) Test methods and procedures.

NR 440.65(4)(a) (a) Methods in 40 CFR part 60, Appendix A, incorporated by reference in s. NR 440.17 (1), except as provided under s. NR 440.08 (2), shall be used to determine compliance with sub. (3), as follows:

NR 440.65(4)(a)1. 1. Method 24 for analysis of inks. If nonphotochemically reactive solvents are used in the inks standard gas chromatographic techniques may be used to identify and quantify these solvents. The results of Method 24 may be adjusted to subtract these solvents from the measured VOC content.

NR 440.65(4)(a)2. 2. Method 24A for VOC concentration (the calibration gas shall be propane);

NR 440.65(4)(a)3. 3. Method 1 for sample and velocity traverses;

NR 440.65(4)(a)4. 4. Method 2 for velocity and volumetric flow rates;

NR 440.65(4)(a)5. 5. Method 3 for gas analysis;

NR 440.65(4)(a)6. 6. Method 4 for stack gas moisture.

NR 440.65(4)(b) (b) To demonstrate compliance with sub. (3) (a) 1. the owner or operator of an affected facility shall determine the weighted average VOC content of the ink according to the following procedures:

NR 440.65(4)(b)1. 1. Determine and record the VOC content and amount of each ink used at the print head, including the VOC content and amount of diluent solvent, for any time periods when VOC emission control equipment is not used.

NR 440.65(4)(b)2. 2. Compute the weighted average VOC content by the following equation:

NR 440.65(4)(b)3. 3. The weighted average VOC content of the inks shall be calculated over a period that does not exceed one calendar month or 4 consecutive weeks. A facility that uses an accounting system based on quarters consisting of two 28 calendar day periods and one 35 calendar day period may use an averaging period of 35 calendar days 4 times per year, provided the use of such an accounting system is documented in the initial performance test.

NR 440.65(4)(b)4. 4. Each determination of the weighted average VOC content shall constitute a performance test for any period when VOC emission control equipment is not used. Results of the initial performance test shall be reported to the department. Method 24 or ink manufacturers’ formulation data along with plant blending records (if plant blending is done) may be used to determine VOC content. The department may require the use of Method 24 if there is a question concerning the accuracy of the ink manufacturer’s data or plant blending records.

NR 440.65(4)(b)5. 5. If, during the time periods when emission control equipment is not used, all inks used contain less than 1.0 kilogram VOC per kilogram ink solids the owner or operator is not required to calculate the weighted average VOC content but shall verify and record the VOC content of each ink (including any added dilution solvent) used as determined by Method 24, ink manufacturers’ formulation data or plant blending records.