9 Va. Admin. Code § 5-40-8382
"Cleaning materials" means any washes, cleaners, solvents, or rejuvenators that are used to remove excess printing inks, oils, and residual paper from a press, press equipment, or press parts, or used to remove dried ink from areas around a press. Cleaning materials include solvents and cleaners used for manual cleaning, and cleaning solutions used by automatic cleaning systems such as roller wash and type wash. Cleaning materials do not include cleaners used for cleaning electronic components of a press, pre-press cleaning operations (e.g., platemaking), post-press cleaning operations (e.g., binding), cleaning supplies such as detergents used to clean the floor (other than to remove dried ink from areas around a press), and cleaning performed in parts washers and cold cleaners subject to Article 47 (9VAC5-40-6820 et seq.) of Part II of 9VAC5-40 (Existing Stationary Sources).
"Composite partial vapor pressure" means the sum of the partial pressures of the compounds defined as volatile organic compounds. Composite partial vapor pressure is calculated as follows:
where:
Wi | = | Weight of the "i"th VOC compound, in grams. |
Ww | = | Weight of water, in grams. |
We | = | Weight of exempt compound, in grams. |
MWi | = | Molecular weight of the "i"th VOC compound, in grams/gram-mole. |
MWw | = | Molecular weight of water, in grams/gram-mole. |
MWe | = | Molecular weight of exempt compound, in grams/gram-mole. |
PPc | = | VOC composite partial pressure at 20°C, in millimeters of mercury (mm Hg). |
VPi | = | Vapor pressure of the "i"th VOC compound at 20°C, in mm Hg. |
"First installation date" means the date that a control device is first installed for the purpose of controlling emissions. The first installation date does not change if the control device is later moved to a new location or installed on a different press.
"Heatset" means a printing process in which heat from a dryer is used to evaporate ink oils from the substrate.
"Letterpress printing" means a printing process in which the image area is raised relative to the nonimage area and paste ink is transferred to the substrate directly from the image surface.
"Letterpress printing operation" means one or more printing processes employing letterpress printing on printing presses and the related processes necessary to directly support the operation of those presses including, but not limited to, cleaning, pre-press, and post-press operations.
"Non-heatset" means a printing process in which the printing inks are set and dried by absorption or oxidation rather than heat. For the purposes of this article, UV-cured and electron beam-cured inks are considered non-heatset.
"Press" means a printing production assembly composed of one or more units to produce a printed substrate (sheet or web).
"Printing" means a photomechanical process in which a transfer of text, designs, and images occurs through contact of an image carrier with a substrate.
"Printing process" means any operation or system wherein printing ink or a combination of printing ink and surface coating is applied, dried, or cured and that is subject to the same emission standard. A printing process may include any equipment that applies, conveys, dries, or cures inks or surface coatings, including, but not limited to, flow coaters, flashoff areas, presses, digital output devices, heaters, dryers, drying areas, and ovens.
"Sheet-fed" means a printing process in which individual sheets of substrate are fed into the press sequentially.
"Theoretical potential to emit" means for the purposes of this article the maximum capacity of a letterpress printing process to emit VOC and shall be based on emissions at design capacity or maximum production and maximum operating hours (8,760 hours/year) before add-on controls, unless the letterpress printing process is subject to state and federally enforceable permit conditions that limit production rates or hours of operation.
"12-month rolling period" means a period that is determined monthly and consists of the previous 12 consecutive calendar months.
"Unit" means, for the purposes of this article, the smallest complete printing component, composed of an inking system, of a letterpress printing press.
"VOC" means volatile organic compound.
"Web" means a continuous roll of printing substrate.
9 Va. Admin. Code § 5-40-8382
Statutory Authority: § 10.1-1308 of the Code of Virginia; §§ 110, 111, 123, 129, 171, 172, and 182 of the federal Clean Air Act (40 CFR Parts 51 and 60).