Section 096-161-2 - DefinitionsA.Actual Emissions. "Actual Emissions" means calculating a VOC mass balance over a period of time, using invoices and usage records to determine amounts of ink, fountain solution and cleaning solutions purchased and used; multiplied by an applicable emission retention factor.B.Alcohol."Alcohol" means any of the following compounds, when used as a fountain solution additive for offset lithographic or letterpress printing: ethanol, n-propanol, and isopropanol.C.Alcohol substitute."Alcohol substitute"means any non-alcohol additives that contain VOCs and are used in the fountain solution; including, but not limited, to ethylene glycol or glycol ether compounds. Some additives are used to reduce the surface tension of water: others are added to prevent piling (ink build-up).D.Automatic BlanketWashSystem."Automatic Blanket Wash System" means equipment used to clean lithographic blankets which can include, but is not limited to, those utilizing a cloth and expandable bladder, brush, spray, or impregnated cloth system.E.BACT. "BACT" means Best Available Control Technology as defined in Definitions Regulation 06-096 CMR 100 effective December 24, 2005).F.CAM. "CAM" means Compliance Assurance Monitoring as described in 40 CFR Part 64.G.Cleaning Solution. "Cleaning Solution" means any liquid solvent or solution used to clean the operating surfaces of a printing press and its parts. For purposes of this Chapter, cleaning solutions include, but are not limited to, blanket wash, roller wash, metering roller cleaner, plate cleaner, impression cylinder washes, rubber rejuvenators, and other cleaners used for cleaning a press, press parts, or to remove dried ink or coating from areas around the press.H.Control device."Control device" means equipment used to reduce, by destruction or removal, the amount of air pollutant(s) in an air stream prior to discharge to the ambient air.I.Dampening System. "Dampening system" means equipment used to deliver the fountain solution to the lithographic plate.J.Fountain Solution."Fountain solution" means a mixture of water and other volatile and non-volatile chemicals and additives that maintains the quality of the printing plate including preventing debris build up (e.g., spray power, paper fiber, coating particles, dried ink particles and other materials), and increases viscosity and reduces the surface tension of the water so that is spreads easily across the printing plate service. The fountain solution wets the non-image area so that the ink is maintained within the image areas. Non-volatiles additives include mineral salts and hydrophilic gums. Alcohol and alcohol substitutes are the most common VOC additives used to reduce the surface tension of the fountain solution.K.Fountain Solution Reservoir. "Fountain Solution Reservoir" means the collection tank that accepts fountain solution recirculated from printing unit(s). In some cases, the tanks are equipped with cooling coils for refrigeration of the fountain solution.L.Heatset."Heatset"means any operation where the printing inks are set by the evaporation of the ink oils in a heatset dryer.M.Heatset Dryer. "Heatset dryer" means any device used in heatset web offset lithographic printing to heat the printed substrate and to promote the evaporation of ink oils.N.Inking System. "Inking System" means a series of rollers used to meter ink onto the lithographic plate. The system can include agitators, pumps, totes, and others types of ink containers.O.Letterpress printing press. "Letterpress Printing press" means a printing press that uses a relief method which uses type directly. Printing is done from cast metal type or plates on which the image or printing areas is raised above the nonprinting areas. Ink rollers touch on the surface of the raised areas. The surrounding (nonprinting) areas are lower and do not receive ink. The inked image is transferred directly to the paper.P.Lithography. "Lithography" means a planographic printing process where the image and nonimage areas are chemically differentiated; the image area is oil receptive and the nonimage area is water receptive. This method differs from other printing methods, where the image is typically printed from a raised or recessed surface.Q.Non-heatset. "Non-heatset" means a printing process where the printing inks are set by absorption and/or oxidation of the ink oil, not by evaporation of the ink oils in a dryer. For the purposes of this Chapter, use of an infrared heater or printing conducted using ultraviolet-cured or electron beam-cured inks is considered non-heatset.R.Offset. "Offset" means a printing process that transfers the ink film from the lithographic plate to an intermediary surface (blanket), which, in turn, transfers the ink film to the substrate.S.Press. "Press" means printing production assembly composed of one or more units used to produce a printed substrate including any associated coating, spray power application, heatset web dryer, ultraviolet or electron beam curing units, or infrared heating units.T.Sheet fed."Sheet fed" means any operation where paper is fed to the press in individual sheets.U.Substrate."Substrate" means the surface to which a coating is applied.V.VOC Composite Partial Vapor Pressure - "VOC Composite Partial Vapor Pressure" means the sum of the partial pressure of the compounds defined as VOCs. VOC composite partial vapor pressure is calculated as follows: Click here to view Image
Where:
Wi = Weight of the "i"th VOC compound, in grams
Ww = Weight of water, in grams
Wc = Weight of exempt compound, in grams
MWi = Molecular weight of the "i"th VOC compound, in g/g-mole
MWw = Molecular weight of water, in g/g-mole
MWc = Molecular weight of exempt compound, in g/g-mole
PPc = VOC composite partial vapor pressure at 20[DEGREE]C (68[DEGREE]F), in mm Hg
VPi = Vapor pressure of the "i"th VOC compound at 20[DEGREE]C (68[DEGREE]F), in mm Hg
W.Web. "Web" means a continuous roll of paper used as a printing substrate.06- 096 C.M.R. ch. 161, § 2