NR 440.71(2)(b)6.6. “Cgv” means the concentration of VOC in the gas stream entering each individual carbon adsorber vessel (v), in parts per million by volume. For the purposes of calculating the efficiency of the individual adsorber vessel, Cgv may be measured in the carbon adsorption system’s common inlet duct prior to the branching of individual inlet ducts.

NR 440.71(2)(b)7.7. “Chv” means the concentration of VOC in the gas stream exiting each individual carbon adsorber vessel (v), in parts per million by volume.

NR 440.71(2)(b)8.8. “E” means the control device efficiency achieved for the duration of the emission test, expressed as a fraction.

NR 440.71(2)(b)9.9. “F” means the VOC emission capture efficiency of the VOC capture system achieved for the duration of the emission test, expressed as a fraction.

NR 440.71(2)(b)10.10. “FV” means the average inward face velocity across all natural draft openings in a total enclosure, in meters per hour.

NR 440.71(2)(b)11.11. “G” means the calculated weighted average mass of VOC per volume of coating solids, in kilograms per liter, applied each nominal 1-month period.

NR 440.71(2)(b)12.12. “Hv” means the individual carbon adsorber vessel (v) efficiency achieved for the duration of the emission test, expressed as a fraction.

NR 440.71(2)(b)13.13. “Hsys” means the carbon adsorption system efficiency calculated when each adsorber vessel has an individual exhaust stack.

NR 440.71(2)(b)14.14. “Lsi” means the volume fraction of solids in each coating (i) applied during a nominal 1-month period as determined from the facility’s formulation records.

NR 440.71(2)(b)15.15. “Mci” means the total mass in kilograms of each coating (i) applied at an affected coating operation during a nominal 1-month period as determined from facility records. 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 mass of the coating has been determined.

NR 440.71(2)(b)17.17. “Qaj” means the volumetric flow rate of each gas stream (j) exiting the emission control device, in dry standard cubic meters per hour when Method 18 or 25 is used to measure VOC concentration or in standard cubic meters per hour (wet basis) when Method 25A is used to measure VOC concentration.

NR 440.71(2)(b)18.18. “Qbi” means the volumetric flow rate of each gas stream (i) entering the emission control device, in dry standard cubic meters per hour when Method 18 or 25 is used to measure VOC concentration or in standard cubic meters per hour (wet basis) when Method 25A is used to measure VOC concentration.

NR 440.71(2)(b)19.19. “Qdi” means the volumetric flow rate of each gas stream (i) entering the emission control device from the affected coating operation, in dry standard cubic meters per hour when Method 18 or 25 is used to measure VOC concentration or in standard cubic meters per hour (wet basis) when Method 25A is used to measure VOC concentration.

NR 440.71(2)(b)20.20. “Qfk” means the volumetric flow rate of each uncontrolled gas stream (k) emitted directly to the atmosphere from the affected coating operation, in dry standard cubic meters per hour when Method 18 or 25 is used to measure VOC concentration or in standard cubic meters per hour (wet basis) when Method 25A is used to measure VOC concentration.

NR 440.71(2)(b)21.21. “Qgv” means the volumetric flow rate of the gas stream entering each individual carbon adsorber vessel (v), in dry standard cubic meters per hour when Method 18 or 25 is used to measure VOC concentration or in standard cubic meters per hour (wet basis) when Method 25A is used to measure VOC concentration. For purposes of calculating the efficiency of the individual adsorber vessel, the value of Qgv can be assumed to equal the value of Qhv measured for that adsorber vessel.

NR 440.71(2)(b)22.22. “Qhv” means the volumetric flow rate of the gas stream exiting each individual carbon adsorber vessel (v), in dry standard cubic meters per hour when Method 18 or 25 is used to measure VOC concentration or in standard cubic meters per hour (wet basis) when Method 25A is used to measure VOC concentration.

NR 440.71(2)(b)23.23. “Qin i” means the volumetric flow rate of each gas stream (i) entering the total enclosure through a forced makeup air duct, in standard cubic meters per hour (wet basis).

NR 440.71(2)(b)24.24. “Qout j” means the volumetric flow rate of each gas stream (j) exiting the total enclosure through an exhaust duct or hood, in standard cubic meters per hour (wet basis).

NR 440.71(2)(b)25.25. “R” means the overall VOC emission reduction achieved for the duration of the emission test, expressed as a percentage.

NR 440.71(2)(b)26.26. “RSi” means the total mass (kg) of VOC retained in the coated base film after oven drying for a given magnetic tape product.

NR 440.71(2)(b)27.27. “Vci” means the total volume in liters of each coating (i) applied during a nominal 1-month period as determined from facility records.

NR 440.71(2)(b)28.28. “Woi” means the weight fraction of VOC in each coating (i) applied at an affected coating operation during a nominal 1-month period as determined by Method 24. This value 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 weight fraction of VOC in the coating has been determined.

NR 440.71(2)(c)(c) Tables 1A and 1B present a cross reference of the affected facility status and the relevant subsections of the regulation.

aThis table is presented for the convenience of the user and is not intended to supersede the language of the regulation. For the details of the requirements, refer to the text of the regulation.

bRefer to Part B to determine which paragraphs of subs. (5), (6) and (8) correspond to each compliance provision (sub. (4)).

cAs per sub. (1) (b), any new coating operation with solvent utilization <38 m3/yr or any modified or reconstructed coating operation with solvent utilization <370 m3/yr is exempt from the VOC standards (sub. (3)). Such coating operations are subject only to subs. (5) (a) and (8) (b) and (c). However, should a coating operation once exceed the applicable annual solvent utilization cutoff, that coating operation shall be subject to the VOC standards (sub. (3)) and all other applicable subsections. Once this has occurred, the coating operation shall remain subject to those requirements regardless of changes in annual solvent utilization.