(a) All terms used in this subpart that are not defined below have the meaning given to them in the Act and in subpart A of this part.
Automatic temperature compensator means a device that continuously senses the temperature of fluid flowing through a metering device and automatically adjusts the registration of the measured volume to the corrected equivalent volume at a base temperature.
Base temperature means an arbitrary reference temperature for determining liquid densities or adjusting the measured volume of a liquid quantity.
Density means the mass of a unit volume of liquid, expressed as grams per cubic centimeter, kilograms per liter, or pounds per gallon, at a specified temperature.
Gravure cylinder means a printing cylinder with an intaglio image consisting of minute cells or indentations specially engraved or etched into the cylinder's surface to hold ink when continuously revolved through a fountain of ink.
Performance averaging period means 30 calendar days, one calendar month, or four consecutive weeks as specified in sections of this subpart.
Proof press means any device used only to check the quality of the image formation of newly engraved or etched gravure cylinders and prints only non-saleable items.
Publication rotogravure printing press means any number of rotogravure printing units capable of printing simultaneously on the same continuous web or substrate and includes any associated device for continuously cutting and folding the printed web, where the following saleable paper products are printed:
Catalogues, including mail order and premium,
Direct mail advertisements, including circulars, letters, pamphlets, cards, and printed envelopes,
Display advertisements, including general posters, outdoor advertisements, car cards, window posters; counter and floor displays; point-of-purchase, and other printed display material,
Magazines,
Miscellaneous advertisements, including brochures, pamphlets, catalogue sheets, circular folders, announcements, package inserts, book jackets, market circulars, magazine inserts, and shopping news,
Newspapers, magazine and comic supplements for newspapers, and preprinted newspaper inserts, including hi-fi and spectacolor rolls and sections,
Periodicals, and
Telephone and other directories, including business reference services.
Raw ink means all purchased ink.
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.
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.
Solvent-borne ink systems means ink and related coating mixtures whose volatile portion consists essentially of VOC solvent with not more than five weight percent water, as applied to the gravure cylinder.
Solvent recovery system means an air pollution control system by which VOC solvent vapors in air or other gases are captured and directed through a condenser(s) or a vessel(s) 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.
VOC means volatile organic compound.
VOC solvent means an organic liquid or liquid mixture consisting of VOC components.
Waterborne ink systems means ink and related coating mixtures whose volatile portion consists of a mixture of VOC solvent and more than five weight percent water, as applied to the gravure cylinder.
(b) Symbols used in this subpart are defined as follows:
DB = the density at the base temperature of VOC solvent used or recovered during one performance averaging period.
Dci = the density of each color of raw ink and each related coating (i) used at the subject facility (or facilities), at the coating temperature when the volume of coating used is measured.
Ddi = the density of each VOC solvent (i) added to the ink for dilution at the subject facility (or facilities), at the solvent temperature when the volume of solvent used is measured.
Dgi = the density of each VOC solvent (i) used as a cleaning agent at the subject facility (or facilities), at the solvent temperature when the volume of cleaning solvent used is measured.
Dhi = the density of each quantity of water (i) added at the subject facility (or facilities) for dilution of waterborne ink systems at the water temperature when the volume of dilution water used is measured.
Dmi = the density of each quantity of VOC solvent and miscellaneous solvent-borne waste inks and waste VOC solvents (i) recovered from the subject facility (or facilities), at the solvent temperature when the volume of solvent recovered is measured.
Doi = the density of the VOC solvent contained in each raw ink and related coating (i) used at the subject facility (or facilities), at the coating temperature when the volume of coating used is measured.
Dwi = the density of the water contained in each waterborne raw ink and related coating (i) used at the subject facility (or facilities), at the coating temperature when the volume of coating used is measured.
Lci = 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.
Ldi = the measured liquid volume of each VOC solvent (i) with corresponding density, Ddi, added to dilute the ink used at the subject facility (or facilities)
Mci = the mass, determined by direct weighing, of each color of raw ink and each related coating (i) used at the subject facility (or facilities).
Md = the mass, determined by direct weighing, of VOC solvent added to dilute the ink used at the subject facility (or facilities) during one performance averaging period.
Mg = the mass, determined by direct weighing, of VOC solvent used as a cleaning agent at the subject facility (or facilities) during one performance averaging period.
Mh = the mass, determined by direct weighing, of water added for dilution with waterborne ink systems used at the subject facility (or facilities) during one performance averaging period.
Mm = the mass, determined by direct weighing, of VOC solvent and miscellaneous solvent-borne waste inks and waste VOC solvents recovered from the subject facility (or facilities) during one performance averaging period.
Mo = the total mass of VOC solvent contained in the raw inks and related coatings used at the subject facility (or facilities) during one performance averaging period.
Mr = the total mass of VOC solvent recovered from the subject facility (or facilities) during one performance averaging period.
Mt = the total mass of VOC solvent used at the subject facility (or facilities) during one performance averaging period.
Mv = the total mass of water used with waterborne ink systems at the subject facility (or facilities) during one performance averaging period.
Mw = the total mass of water contained in the waterborne raw inks and related coatings used at the subject facility (or facilities) during one performance averaging period.
P = the average VOC emission percentage for the subject facility (or facilities) for one performance averaging period.
Voi = the liquid VOC content, expressed as a volume fraction of VOC volume per total volume of coating, of each color of raw ink and related coating (i) used at the subject facility (or facilities).
Vwi = the water content, expressed as a volume fraction of water volume per total volume of coating, of each color of waterborne raw ink and related coating (i) used at the subject facility (or facilities).
Woi = the VOC content, expressed as a weight fraction of mass of VOC per total mass of coating, of each color of raw ink and related coating (i) used at the subject facility (or facilities).
Wwi = the water content, expressed as a weight fraction of mass of water per total mass of coating, of each color of waterborne raw ink and related coating (i) used at the subject facility (or facilities).
(c) The following subscripts are used in this subpart with the above symbols to denote the applicable facility:
a = affected facility.
b = both affected and existing facilities controlled in common by the same air pollution control equipment.
e = existing facility.
f = all affected and existing facilities located within the same plant boundary.
[47 FR 50649, Nov. 8, 1982, as amended at 65 FR 61761, Oct. 17, 2000]