Definitions submitted by Massachusetts for Incorporation into the SIP
TermState Regulatory Citation

Definition
Actual Construction (already in SIP)
7.54
means in general, initiation of physical on-site construction activities of any facility subject to the requirements of 310 CMR 7.00, which are of a permanent nature. Such activities include, but are not limited to, installation of building supports and foundations, laying underground pipework and construction of permanent structures.
Adhesion Promoter
7.18
means a coating designed to facilitate the bonding of a primer or topcoat on surfaces such as trim moldings, door locks, and door sills, where sanding is impracticable, and on plastic parts and the edges of sanded areas.
Administrator
7.26(16), 7.27
means the administrator of the U.S. Environmental Protection Agency or his designee.
Alter or Alteration
Throughout
means any physical change or change in the method of operation (including modification or reconfiguration of an emissions unit, change in the raw material used or change in the operating rate) which would result in an increase in potential emissions or an increase in ambient air impacts (i.e., reduced stack height).
Alternative Fuel
7.22, 7.45, 7.54
means any fuel designated as such on an annual list issued by the Department, including methanol, denatured ethanol, and other alcohols; mixtures containing 85% or more by volume of methanol, denatured ethanol, and other alcohols with gasoline or other fuels; natural gas; liquified petroleum gas; hydrogen, coal-derived liquid fuels; fuels (other than alcohol) derived from biological materials; electricity (including electricity from solar energy); and any other fuel that the Department determines is substantially not petroleum.
Alternative Fuel Vehicle
7.45 (MA Green Fleet Program)
means a motor vehicle as defined in M.G.L. c. 90, § 1, which the Department determines to:
(a) operate exclusively on an alternative fuel; and
(b) meets applicable state and federal safety and emission standards.
Anti-glare Safety Coating
7.18
means a low gloss coating formulated to eliminate glare for safety purposes on interior surfaces of a vehicle, as specified under the U.S. Department of Transportation Motor Vehicle Safety Standards.
Aqueous Cleaner
7.18
means a cleaning fluid or device using a cleaning fluid that is composed of soap and/or other water-soluble materials in a water solution.
Asbestos
7.09, 7.15
means all asbestiform varieties of the mineral family called silicates including: serpentinite (chrysotile), riebeckite (crocidolite), cummingtonite-grunerite-(atmosite), anthophyllite, and actinolite- tremolite.
Asbestos-containing Material
7.09, 7.15
means friable asbestos and any material containing 1% or more asbestos by area as determined by a laboratory using USEPA approved methods. This term includes but is not limited to sprayed-on and troweled-on materials applied to ceilings, walls, and ceilings, walls, and other surfaces, insulation on pipes, boilers, tanks, ducts, and other equipment, structural and non-structural members, tiles, shingles or asbestos-containing paper.
Automotive Refinishing Facility
7.18
means any facility at which the interior or exterior bodies of automobiles, motorcycles, trucks, mobile equipment, or vans are re-painted. This definition includes refinishing operations that travel to various locations, that refinish new vehicles damaged in transit before their initial sale, and that refinish aftermarket vehicles.
Bakery
7.18(2a)
means a facility consisting of one or more ovens for the baking of bread or other yeast leavened products.
Capture Efficiency
7.02, App B
means the ability of a building, enclosure or system to capture air contaminants within the building, enclosure or system before the air contaminants are directed
to an air pollution control device. Capture efficiency is determined in accordance with EPA Reference Test Method Number 204, as specified in 40 CFR Part 51 Appendix M, or by other methods approved by the Department and EPA.
CEMS
7.08, 7.19
means a continuous emissions monitoring system.
CFR
Throughout
means the Code of Federal Regulations.
Combined Cycle Combustion Turbine
7.19
means any combustion turbine, including the
duct burner portion thereof, in which heat is recovered from the exhaust gases to heat water or generate steam.
Compliance Certification
Throughout
means a statement detailing the compliance status of the
emission unit or facility in regards to each applicable requirement, signed by a responsible official of the facility as being complete, accurate and true to the best knowledge of the signatory.
Construct or Construction
Throughout
means any physical change or change in the method of
operation (including fabrication, erection, installation, demolition, or modification of an emissions unit) which would result in an increase in potential emissions.
Cooling Tower
7.02
as used in 310 CMR 7.02(2)(g)6. means, an open water recirculation device that uses fans or natural draft to draw or force ambient air through the device to cool warm water by direct contact.
Dry Bottom
7.19
means a furnace design in which the coal-fired unit equipped with an ash disposal hopper bottom with sufficient cooling surface so that the ash particles impinging on the furnace walls or hopper bottom can be removed in a dry state.
Duct Burner
7.26, 7.32
means a device that combusts fuel and that is placed in the exhaust duct from another source, such as a stationary gas turbine, internal combustion engine, kiln etc., to allow the firing of additional fuel to heat the exhaust gases before the exhaust gases enter a heat
recovery steam generating unit.
Elastomeric Coating 
7.18
means a coating that is designed for application over flexible parts, such as elastomeric bumpers.
Emergency or Standby Engine
7.02, 7.03, 7.12, 7.26
for the purposes of 310 CMR 7.02(8)(i) and 7.03(10),
means any stationary internal combustion engine which operates as an emergency or standby mechanical or electrical power source. A load shaving unit, peaking power production unit or a standby engine in an energy assistance program is not an emergency or standby engine under this definition.
Emission Statement 
7.12
is a certification submitted by the owner or operator of a facility that describes the actual annual emissions of VOC and/or NOx from the facility as well as the
average Ozone Season daily emissions from the facility.
Energy Input Capacity
7.02(2), 7.04(2), 7.05, 7.06, 7.12, 7.19
means the ability of a fuel utilization facility, based on the Higher Heating Value (HHV) of the fuel, to combust a stated maximum amount of fuel on a steady state basis, as determined by the physical design and characteristics of the fuel utilization facility and does not include the energy input from preheated combustion air, recirculated flue gases, or exhaust gases from other sources.
EPA
Throughout
means the United States Environmental Protection Agency.
Existing Facility
7.02, 7.26
for the purposes of 310 CMR 7.02(8), means any facility that is in operation on or before June 1, 1972, or any proposed facility of which the construction,
substantial reconstruction or alteration of which has been approved in writing by the Department
on or before June 1, 1972. All facilities as specified in the Federal Register, Volume 36, No. 247, December 23, 1971, the construction or modification of which was initiated after August 17, 1971 shall not be defined as existing facilities.
Face Firing
7.19 (?)
means a furnace firing design in which the burners are mounted in an array on one or more vertical walls including
(a) opposed firing, where the burners are mounted on two opposite walls; and
(b) single-wall firing, where the burners are mounted on only one wall.
Facility
Throughout
means any installation or establishment and associated equipment, located on the same, adjacent or contiguous property, capable of emissions; and for the purpose of 310 CMR 7.15, it means any structure, installation, building, equipment, or ship.
Federally Enforceable
Throughout
means all limitations and conditions which are enforceable by the Administrator, including but not limited to, those requirements developed pursuant to
40 CFR Part 60 (New Source Performance Standards), 40 CFR Part 61 (National Emission Standards for Hazardous Air Pollutants), 40 CFR Part 63 (National Emission Standards for Hazardous Air Pollutants for Source Catergories), 40 CFR Parts 72 through 80 (Acid Rain Program) and requirements within the Massachusetts State Implementation Plan. Federally
enforceable requirements also include those requirements in operating permits issued either
pursuant to 40 CFR part 71 or under 310 CMR 7.00: Appendix C, (except those listed as state enforceable only) any permit requirements established pursuant to 40 CFR 52.21 (Prevention of significant deterioration of air quality), under plan approval requirements in either 310 CMR 7.02 or 310 CMR 7.00: Appendix A. Federally enforceable limitations and conditions can also be contained in either a permit restriction issued under 310 CMR 7.02(9), 7.02(10), 7.02(11) or equipment installed under 310 CMR 7.03, that has been made federally enforceable after the EPA has approved 310 CMR 7.02 and 7.03 into the Massachusetts SIP.
Federal Potential to Emit or Federal Potential Emissions
7.02
means the maximum capacity of a stationary source to emit a regulated pollutant under its physical and
operational design. Any physical or operational limitation on the capacity of the source to emit
a regulated pollutant, including air pollution control equipment and restriction on hours of operation or on the type or amount of material combusted, stored, or processed, shall be treated as part of its design only if the limitation or the effect it would have on emissions is federally enforceable. To be federally enforceable, a limitation on any facility's capacity to emit a pollutant shall include testing, monitoring, and recordkeeping procedures sufficient to demonstrate compliance with the limitations. Examples of permit or SIP limitations generally considered federally enforceable are limitations on the allowable capacity of the equipment,
requirements for the installation, operation and maintenance of pollution control equipment, limits on hours of operation, and restrictions on amounts of materials combusted, stored, or produced. To be federally enforceable, restrictions on operation, production, or emissions must be stated in terms of the shortest averaging time that can be used as a practical matter, e.g., pounds per hour, or gallons per hour, and they must be tied to other enforceable operating
restrictions at the source. General limitations on potential to emit, such as yearly limits (e.g., in tons per year), by themselves, are not considered federally enforceable. The use of hourly, daily, weekly, or monthly rolling limits are generally acceptable. Any federally enforceable limitations or conditions must be enforceable as a practical matter, ensure continuous
compliance with the restrictions, and include adequate testing, monitoring, and record keeping procedures sufficient to demonstrate compliance with the limitations or conditions of an applicable federally enforceable document described above. Fugitive emissions, to the extent quantifiable, are included in determining the potential to emit of a stationary source. Secondary emissions do not count in determining the potential to emit of a stationary source.
Ferrous Cupola Foundry
7.02
means a vertical cylindrical furnace using pig iron, scrap
iron, scrap steel and coke as charging components. Ferrous Cupola Foundries can be separated into "Jobbing" Foundries and "Production" foundries. Jobbing foundries run intermittently for just long enough at one time to pour the molds that are ready on the foundry floor on a job-by job basis. Production foundries will melt metal continuously and pour to a succession of molds that are constantly being prepared to receive the flow of molten iron.
Four-Stage Coating System
7.18(28)
means a topcoat system composed of a colored basecoat,
two semi-transparent midcoats, and a final transparent clearcoat. For compliance purposes, the
VOC content of four-stage coating systems shall meet the emission limitation for three or four stage
topcoats in Table 7.18(28)(c), and is calculated according to the following formula:

Where:

VOC T4-stage is the weighted average of the VOC content, as applied, in the basecoat, midcoat, and clearcoat system.

VOCbc is the VOC content, as applied, of any given basecoat.
VOCmc1 is the VOC content, as applied, of the first midcoat.
VOCmc2 is the VOC content, as applied, of the second midcoat.
2VOCcc is twice the VOC content, as applied, of any given clearcoat.

VOC T4-stage = (VOC bc + VOC mc1 + VOC mc2 + 2 VOC cc) 
                             _____________________________________
                                                                   5
Friable Asbestos-Containing Material
7.09
means any dry material containing 1% or more asbestos by area, as determined by a laboratory using USEPA approved methods, that hand pressure can crumble, pulverize, or reduce to powder.
Fuel Cell
7.28, 7.32
means an electrochemical device that converts the chemical energy in a fuel into electricity and heat.
Fugitive Emissions
7.03, 7.08, 7.54, 7.71, App A, B, C 
means those emissions which could not reasonably pass through a stack, chimney, vent, or other functionally equivalent opening.
Glass
7.19
means a hard amorphous inorganic substance made by fusing silicates, and sometimes borates and phosphates, with certain basic oxides.
Glass Melting Furnace
7.19(11)
means equipment using heat for the production of glass. A unit comprising a refractory vessel in which raw materials are charged, melted at high temperature, refined, and conditioned to produce molten glass.
Halogenated Organic Compound
7.02, 7.03, 7.18
is any compound of carbon (excluding metallic
carbides or carbonates and ammonium carbonate) combined with a halogen. For purposes of 310 CMR 7.12 and 310 CMR 7.18, halogenated organic compounds (HOC) are the following specific chemicals: methylene chloride, perchloroethylene (tetrachloroethylene), CFC-11
(trichlorofluoromethane), CFC-12 (dichlorodifluoromethane), CFC-22 (chlorodifluoromethane), FC-23 (trifluoromethane), CFC-114 (dichlorotetrafluoro- ethane), and CFC-115
(chloropentafluoroethane).
Hardener
7.18(28),7.25
means an additive designed to promote a faster cure of coatings which cure by chemical cross-linking of the resin components.
Hazardous Air Pollutant (HAP
7.02, 7.03, 7.12, 7.26, 7.38, App B
means an air contaminant designated by EPA under
42 U.S.C. 7412, as modified by EPA in 40 CFR Part 63, Subpart C (40 CFR 63.60 through .69). That list is incorporated by reference herein, together with all amendments and supplements thereto. A copy of the list is available from the Department.
Heat Release Rate
7.19(4)
means the steam generating unit design heat input capacity (in Btu per hour) divided by the furnace volume (in cubic feet); the furnace volume is that volume bounded by the front furnace wall where the burner is located the furnace side waterwall, and extending to the level just below or in front of the first row of convection pass tubes.
Impact Resistant Coating
7.18
means a coating designed to resist chipping caused by road
debris.
Lean Burn Engine
7.19
means a stationary reciprocating internal combustion engine in which the amount of O2 in the engine exhaust gases is 1.0% or more.
Lowest Achievable Emission Rate (LAER)
App A
means, for any source, the more
stringent rate of emissions based on the following:

(a) The most stringent emissions limitation which is contained in any state SIP for such class or category of stationary source, unless the owner or operator of the proposed stationary source demonstrates that such limitations are not achievable; or

(b) The most stringent emissions limitation which is achieved in practice by such class or category of stationary source. This limitation, when applied to a modification, means the lowest achievable emissions rate for the new or modified emissions units within a stationary source.  In no event shall LAER allow a proposed new or modified stationary source to emit any pollutant in excess of the amount allowable pursuant to applicable New Source Performance Standards of 40 CFR Part 60.
Malfunction
7.08, 7.24, 7.40
means any sudden, infrequent, and not reasonably preventable failure of air pollution control and monitoring equipment, process equipment, or a process to operate in a
normal or usual manner. Failures that are caused in part by poor maintenance or careless operation are not malfunctions.
Maximum Achievable Control Technology
7.02, 7.12, 7.26, 7.40, App B
means the standard established by the Administrator pursuant to the Clean Air Act, §§ 112 and 129 (42 U.S.C. 7412 and 42 U.S.C. 7429), that represents the maximum degree of reduction in emissions of hazardous air pollutants determined, after examination of economics, health, and environmental impacts, to be achievable for new or existing sources in the category or sub-category to which the emission standard applies. MACT Standards may be determined by the Department pursuant
to 40 CFR 63 Subpart B.
Maximum Design Capacity
7.02
means the rated design capacity, operating rate or
production rate of an emission unit as determined by the manufacturer of that unit or other method approved by the Department.
Mobile Equipment 
App C, and in the def of automotive refinishing
means, for the purposes of 310 CMR 7.18(28), any equipment that is physically capable of being driven or drawn upon a highway including but not limited to
construction vehicles (such as mobile cranes, bulldozers and concrete mixers); farming equipment (such as tractors and plows); hauling equipment (such as truck trailers, utility bodies and camper shells) and miscellaneous equipment (such as street sweepers and golf carts).
MW
7.08, 7.26, 7.27, 7.28, 7.32, 7.33, 7.70
means megawatt or a unit of electrical power equal to one million watts.
Natural Draft Opening
Definitions only
means any permanent opening in an enclosure that remains
open during operation of the emission unit and is not connected to a duct in which a fan is installed.
Nonattainment Area
App A
means an area designated by the EPA as not meeting the National Ambient Air Quality Standard for a criteria pollutant pursuant to the Clean Air Act, § 107 (42 U.S.C. 7407) and 40 CFR Part 81. The current Massachusetts attainment status is published at 40 CFR 81.322, Subpart C - Section 107 Attainment Status Designations.
Nonattainment Review
7.02, 7.26, 7.27, 7.28, 7.29, App A
is plan review for major sources and major modifications as defined and described in 310 CMR 7.00: Appendix A.
Non-Criteria Pollutant
7.02
is any air contaminant that is not listed as a criteria pollutant.
Non-road Vehicle
7.45 (MA Green Fleet program)
means any motor vehicle and equipment which is not primarily designed or intended for operation on public roadways to provide transportation.
Potential Emissions or Potential To Emit
Throughout
means the maximum capacity of a facility or a stationary source to emit any air contaminant or pollutant under its physical and operational design. Any physical or operational limitation on the capacity of the facility or
stationary source to emit any air contaminant or pollutant, including air pollution control equipment and/or restrictions on hours of operation, or on the type or amount of material combusted, stored or processed, shall be treated as part of the design only if the limitation is specifically stated in the facility's or stationary source's plan approval(s), approved emission control plan(s), operating permit, certification(s), restricted emission status, notification(s) and applicable regulations, or in the case of de minimis sources, in records established and
maintained at the facility or stationary source pursuant to 310 CMR 7.02(2)(b). Fugitive emissions, to the extent quantifiable, are included in determining the potential emissions or the potential to emit of a facility or stationary source; secondary emissions are not included.
Pretreatment Wash Premier
7.18(28)
means the first coat applied to bare metal if solvent-based
primers will be applied. This coating contains a minimum of 0.5% acid by weight, is necessary to provide surface etching, and is applied directly to bare metal surfaces to provide corrosion resistance.
Primer Sealer
7.18(28)
means a coating that improves the adhesion of the topcoat, provides corrosion resistance, promotes color uniformity, and resists penetration by the topcoat.
Primer Surfacer
7.18(28)
means a coating that fills in surface imperfections and builds a film thickness in order to allow sanding.
Reducer
7.26, 7.18(28)
means a solvent added to dilute a coating, usually for the purpose of lowering its viscosity.
Regenerative Cycle Combustion Turbines
7.19
means any stationary combustion turbine which recovers heat from the combustion turbine exhaust gases to preheat the inlet combustion air to the combustion turbine.
Repowering
7.19
means the replacement of an emission unit with a new unit that is less polluting and more efficient than the unit which is being replaced.
Rich Burn Engine
7.19
means any stationary reciprocating internal combustion engine that is not a lean burn engine.
Simple Cycle Combustion Turbine
7.19
means any stationary combustion turbine which does not recover heat from the combustion turbine exhaust gases to heat water or generate steam.
Single-stage Topcoat
7.18
means a topcoat consisting of only one coating.
Soap
7.18, 7.25
means cleansing agents made of the alkali metal salts of fatty acids having from ten to 18 carbon atoms.
Specialty Coating
7.25, 7.18(28)
means a product which is necessary due to unusual job performance requirements. These coatings or additives include, but are not limited to, adhesion promoters,
uniform finish blenders, elastomeric materials, impact resistant coatings, underbody coatings, weld through primers, gloss flatteners, bright metal trim repair, and anti-glare/safety coatings.
Stationary Combustion Turbine
7.19
means any stationary internal combustion engine
which operates with a rotary motion, including any simple cycle turbine, regenerative cycle turbine, or any turbine portion of a combined cycle steam/electric generating system that is not self propelled.
Stationary Reciprocating Internal Combustion Engine
7.12, 7.18, 7.19, 7.26
means any reciprocating internal combustion engine. It does not include an engine that is regulated by EPA
as a non-road engine pursuant to 42 U.S.C. 7543(e) and 42 U.S.C. 7547(e) or is self-propelled.
Stencil Coating 
7.18
means an ink or pigmented coating which is rolled or brushed onto a template or stamp in order to add identifying letters, symbols, or numbers to motor vehicles, or their parts or components.
Stoker
7.19
means a boiler/furnace design that incorporates a feeding mechanism, fuel distribution and ash residue collection system for the purpose of introducing solid fuel into the combustion zone of the boiler/furnace by feeding the fuel onto a grate.
Surface Preparation Product
7.02, 7.03, 7.18(28)
means a product formulated to dissolve and remove tar, grease, wax, and other hydrophobic contaminants from a surface prior to application of a primer.
Tangential Firing
7.19
means a furnace firing design where the burners are mounted at the corners of the furnace chamber.
Three-Stage Coating System
7.18(28)
means a topcoat system composed of a colored basecoat,
a semi-transparent midcoat, and a final transparent clearcoat. For compliance purposes, the VOC content of three-stage coating systems shall meet the emission limitation for topcoats in Table 7.18(28)(c), and is calculated according to the following formula:

VOC T 3-stage = (VOC bc + VOC mc + VOC cc)
                              ________________________
                                                     4
Where:

VOC T3-stage is the weighted average of the VOC content, as applied, in the basecoat, midcoat, and clearcoat system.

VOC bc is the VOC content, as applied, of any given basecoat.

VOC mc is the VOC content, as applied, of any given midcoat.

2VOC cc is twice the VOC content, as applied, of any given clearcoat.
Touch-up Coating
7.18
means a coating applied by brush, airbrush, or non-refillable aerosol can of no more than eight ounces to cover minor surface damage and imperfections.
Two-stage Topcoat
7.18(28)
means a basecoat/clearcoat system composed of a colored basecoat and a transparent final coat. For compliance purposes, the VOC content of basecoat/clearcoat
systems shall meet the emission limitation for two-stage topcoats in Table 7.18(28)(c), and shall be calculated according to the following formula:

VOC T bc/cc = VOC bc + 2 VOC cc
                           _______________
                                         3
Where:
VOC T bc/cc is the weighted average of the VOC content, as applied, in the basecoat (bc) and clearcoat (cc) system.
VOC bc is the VOC content, as applied, of any given basecoat. 
2VOC cc is twice the VOC content, as applied, of any given clearcoat.
Underbody Coating 
7.18
means a coating designed for protection and sound deadening that is typically applied to the wheel wells and underbody of an automobile.
Uniform Finish Blender
7.18
means a coating designed to blend a repaired topcoat into an existing topcoat.
VOC Composite Partial Pressure
7.03, 7.18, 7.26
means the sum of the partial pressures of the compounds defined as VOC. VOC Composite Partial 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 compounds, in grams
Mwi = Molecular weight of the "i"th VOC compound, in g-mole
Mww = Molecular weight of water, in g-mole
Mwe = Molecular weight of exempt compound, in g-mole
PPc = VOC composite partial pressure, in mm Hg
VPi = Vapor pressure of the "i"th compound, in mm Hg
n = The number of VOC compounds
Water Hold-out Coating
Definitions only
means a coating applied to the interior cavity areas of doors, quarter panels, and rocker panels for the purpose of corrosion resistance to prolonged water exposure.
Weld-through Primer
Definitions only 
means a primer that is applied to an area before welding is
performed, and that provides corrosion resistance to the surface after welding has been performed.



