NR 440.56(2)(a)9.9. “Related coatings” means all non-ink purchased liquids and liquid-solid mixtures containing VOC solvent, usually referred to as extenders or varnishes, that are used at publication rotogravure printing presses. NR 440.56(2)(a)10.10. “Rotogravure printing unit” means any device designed to print one color ink on one side of a continuous web or substrate using a gravure cylinder. NR 440.56(2)(a)11.11. “Solventborne ink systems” means ink and related coating mixtures whose volatile portion consists essentially of VOC solvent with not more than 5 weight percent water, as applied to the gravure cylinder. NR 440.56(2)(a)12.12. “Solvent recovery system” means an air pollution control system by which VOC solvent vapors in air or other gases are captured and directed through one or more condensers or a vessel containing beds of activated carbon or other adsorbents. For the condensation method, the solvent is recovered directly from the condenser. For the adsorption method, the vapors are adsorbed, then desorbed by steam or other media, and finally condensed and recovered. NR 440.56(2)(a)14.14. “VOC solvent” means an organic liquid or liquid mixture consisting of VOC components. NR 440.56(2)(a)15.15. “Waterborne ink systems” means ink and related coating mixtures whose volatile portion consists of a mixture of VOC solvent and more than 5 weight percent water, as applied to the gravure cylinder. NR 440.56(2)(b)1.1. DB is the density at the base temperature of VOC solvent used or recovered during one performance averaging period. NR 440.56(2)(b)2.2. Dci is the density of each color of raw ink and each related coating (i) used at the subject facility, at the coating temperature when the volume of coating used is measured. NR 440.56(2)(b)3.3. Ddi is the density of each VOC solvent (i) added to the ink for dilution at the subject facility, at the solvent temperature when the volume of solvent used is measured. NR 440.56(2)(b)4.4. Dgi is the density of each VOC solvent (i) used as a cleaning agent at the subject facility, at the solvent temperature when the volume of cleaning solvent used is measured. NR 440.56(2)(b)5.5. Dhi is the density of each quantity of water (i) added at the subject facility, for dilution of waterborne ink systems at the water temperature when the volume of dilution water used is measured. NR 440.56(2)(b)6.6. Dmi is the density of each quantity of VOC solvent and miscellaneous solventborne waste inks and waste VOC solvents (i) recovered from the subject facility, at the solvent temperature when the volume of solvent recovered is measured. NR 440.56(2)(b)7.7. Doi is the density of the VOC solvent contained in each raw ink and related coating (i) used at the subject facility, at the coating temperature when the volume of coating used is measured. NR 440.56(2)(b)8.8. Dwi is the density of the water contained in each waterborne raw ink and related coating (i) used at the subject facility, at the coating temperature when the volume of coating used is measured. NR 440.56(2)(b)9.9. Lci is the measured liquid volume of each color of raw ink and each related coating (i) used at the facility of a corresponding VOC content, Voi or Woi with a VOC density, Doi, and a coating density, Dci. NR 440.56(2)(b)10.10. Ldi is the measured liquid volume of each VOC solvent (i) with corresponding density, Ddi, added to dilute the ink used at the subject facility. NR 440.56(2)(b)10m.10m. Lgi is the measured liquid volume of each VOC solvent (i) with corresponding density, Dgi, used as a cleaning agent at the subject facility. NR 440.56(2)(b)11.11. Mci is the mass, determined by direct weighing, of each color of raw ink and each related coating (i) used at the subject facility. NR 440.56(2)(b)12.12. Md is the mass, determined by direct weighing, of VOC solvent added to dilute the ink used at the subject facility during one performance averaging period. NR 440.56(2)(b)13.13. Mg is the mass, determined by direct weighing, of VOC solvent used as a cleaning agent at the subject facility during one performance averaging period. NR 440.56(2)(b)14.14. Mh is the mass, determined by direct weighing, or water added for dilution with waterborne ink systems used at the subject facility during one performance averaging period. NR 440.56(2)(b)15.15. Mm is the mass, determined by direct weighing, of VOC solventborne waste inks and waste VOC solvents recovered from the subject facility during one performance averaging period. NR 440.56(2)(b)16.16. Mo is the total mass of VOC solvent contained in the raw inks and related coatings used at the subject facility during one performance averaging period. NR 440.56(2)(b)17.17. Mr is the total mass of VOC solvent recovered from the subject facility during one performance averaging period. NR 440.56(2)(b)18.18. Mt is the total mass of VOC solvent used at the subject facility during one performance averaging period. NR 440.56(2)(b)19.19. Mv is the total mass of water used with waterborne ink systems at the subject facility during one performance averaging period. NR 440.56(2)(b)20.20. Mw is the total mass of water contained in the waterborne raw inks and related coatings used at the subject facility during one performance averaging period.