DEPARTMENT OF ENVIRONMENT, GREAT LAKES, AND ENERGY  
AIR QUALITY DIVISION  
AIR POLLUTION CONTROL  
Filed with the secretary of state on April 28, 2025  
These rules become effective immediately after filing with the secretary of state unless  
adopted under section 33, 44, or 45a(9) of the administrative procedures act of 1969, 1969 PA  
306, MCL 24.233, 24.244, or 24.245a. Rules adopted under these sections become effective  
7 days after filing with the secretary of state.  
(By authority conferred on the director of the department of environment, Great Lakes, and  
energy by sections 5503 and 5512 of the natural resources and environmental protection act,  
1994 PA 451, MCL 324.5503 and 324.5512, and Executive Reorganization Order Nos. 1995-16,  
2009-31, 2011-1, and 2019-1, MCL 324.99903, 324.99919, 324.99921, and 324.99923)  
R 336.1103, R 336.1104, R 336.1113, R 336.1116, R 336.1119, R 336.1120, and  
R 336.1122 of the Michigan Administrative Code are amended, as follows:  
PART 1. GENERAL PROVISIONS  
R 336.1103 Definitions; C.  
Rule 103. As used in these rules:  
(a) "Calendar day" means a 24-hour time period, which normally is midnight to midnight, but  
may, upon written notification to the department, cover a different, consecutive 24-hour time  
period for a specific process.  
(b) "Capacity factor" means the ratio of the average load on a machine or equipment for the  
period of time considered to the capacity rating of the machine or equipment.  
(c) "Carcinogen" means either of the following:  
(i) Belonging to a category of “carcinogenic to humans,” “likely to be carcinogenic to  
humans,” or “suggestive evidence of carcinogenic potential” using the weight of evidence  
narrative approach as described in United States Environmental Protection Agency’s “Guidelines  
for Carcinogen Risk Assessment” as adopted by reference in R 336.1902.  
(ii) Any chemical that has been determined to be a carcinogen using another generally accepted  
guideline for carcinogen risk assessment based on sound scientific and defensible evidence.  
(d) "Charging period," with respect to coke ovens utilizing larry car charging methodology,  
means the total time taken between the point at which the coal starts flowing into the oven and  
the point at which the leveling door and the charging holes are closed with their respective lids  
after the coal from the larry car hoppers is emptied into the oven being charged through the  
respective charging holes and the coal has been leveled in the oven. “Charging period,” with  
respect to coke ovens utilizing pipeline charging methodology, means the total time taken from  
March 20, 2024  
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the time at which the coal starts flowing into an oven by opening the preheated coal inlet valve to  
the time at which the coal flow ends when the inlet valve is closed.  
(e) "Class II finishes on hardboard paneling" means a finish that meets the specifications of  
voluntary product standard PS-59-73, as approved by the American National Standards Institute.  
(f) "Clean air act" means chapter 360, 69 stat. 322, 42 USC 7401 to 7671q and regulations  
promulgated under the clean air act.  
(g) "Clean charge" means furnace charge materials, including molten metal; t-bar; sow; ingot;  
billet; pig; alloying elements; uncoated or unpainted thermally dried metal chips; metal scrap  
dried at 343 degrees Celsius, 650 degrees Fahrenheit, or higher; metal scrap delacquered or  
decoated at 482 degrees Celsius, 900 degrees Fahrenheit, or higher; other oil and lubricant-free  
unpainted or uncoated gates and risers; oil and lubricant-free unpainted or uncoated scrap,  
shapes, or products, pistons for example, that have not undergone any process, for example,  
machining, coating, painting, that would cause contamination of the metal with oils, lubricants,  
coatings, or paints; and on-site runaround.  
(h) "Clear coating" means a coating that lacks color and opacity or is transparent and uses the  
undercoat as a reflectant base or undertone color.  
(i) "Clinical testing of pharmaceuticals" means human or animal health studies that are  
conducted consistent with applicable government regulations, guidelines, or directions for  
approval of a pharmaceutical product, such as those monitored by the United States Food and  
Drug Administration for the purpose of determining any of the following with respect to a drug:  
(i) Pharmacological action.  
(ii) Preferred route of administration.  
(iii) Safe dosage range.  
(iv) Optimum dosage schedule.  
(v) Safety and effectiveness.  
(vi) Product label indications.  
(j) "Coating category" means a type of surface coating for which there is a separate emission  
limit specified in these rules.  
(k) "Coating line" means an operation that is a single series in a coating process and is  
comprised of 1 or more coating applicators and any associated flash-off areas, drying areas, and  
ovens wherein 1 or more surface coatings are applied and subsequently dried or cured.  
(l) "Coating of automobiles and light-duty trucks" means the application of prime, primer  
surfacer, topcoat, and final repair to sheet metal and metallic body components during assembly  
of a vehicle. Examples of these sheet metal and metallic body components include all of the  
following:  
(i) Bodies.  
(ii) Fenders.  
(iii) Cargo boxes.  
(iv) Doors.  
(v) Grill openings.  
(m) "Coating of cans" means exterior coating and interior spray coating in 2-piece can lines;  
interior and exterior coating in sheet coating lines for 3-piece cans; side seam spray coating and  
interior spray coating in can fabricating lines for 3-piece cans; and sealing compound application  
and sheet coating in end coating lines.  
(n) "Coating of coils" means the coating of any flat metal sheet or strip that comes in rolls or  
coils.  
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(o) "Coating of fabric" means the application of any type of coating to flat sheets of a textile  
substrate, including the application of coatings by saturation or impregnation.  
(p) "Coating of large appliances" means the coating of the component metal parts of residential  
and commercial washers, dryers, ranges, refrigerators, freezers, water heaters, dishwashers, trash  
compactors, air conditioners, and other associated products. Examples of these component metal  
parts include all of the following:  
(i) Doors.  
(ii) Cases.  
(iii) Lids.  
(iv) Panels.  
(v) Interior support parts.  
(q) "Coating of metal furniture" means the coating of any furniture made of metal and includes  
the coating of any metal part that is or must be assembled with other metal, wood, fabric, plastic,  
or glass parts to form a furniture piece.  
(r) "Coating of paper" means the application of any decorative, functional, or saturation coating  
applied across the entire width of any flat sheet or pressure-sensitive tape, regardless of substrate,  
or applied across a partial width of any flat sheet or pressure-sensitive tape, regardless of  
substrate, if this partial coverage is not considered to be an operation or series of operations that  
is included in the definition of graphic arts line in R 336.1107(e). These applications and  
substrates include paper, fabric, or plastic film; related wet-coating processes on plastic film,  
including typewriter ribbons, photographic film, and magnetic tape; and decorative coatings on  
metal foil, including gift wrapping and packaging; paperboard; and pressure sensitive tapes or  
labels. Coating of paper does not include coatings used in substrate formation within a  
papermaking system or coatings applied within all printing lines including, but not limited to,  
those that comply with requirements contained in R 336.1624, R 336.1624a, and R 336.1635.  
(s) "Coating of plastic parts of automobiles and trucks" means the coating of any plastic part  
that is or can be assembled with other parts to form an automobile or truck.  
(t) "Coating of plastic parts of business machines" means the coating of any plastic part that is  
or can be assembled with other parts to form a business machine.  
(u) "Coating of vinyl" means any printing, decorative coating, or protective topcoat applied  
over vinyl-coated fabric or vinyl rolls or sheets. Coating of vinyl does not include the  
application of plastisols.  
(v) "Coke battery" means a series of coke ovens arranged side by side with an integral heating  
system.  
(w) "Coke oven" means a chamber in which coal is destructively distilled to yield coke.  
(x) "Cokeside," with respect to a coke oven, means that side of the coke oven through which  
coke is discharged.  
(y) "Coking cycle" means the time during which coal undergoes destructive distillation in a  
coke oven. The coking cycle commences at the end of the charging period and ends at the  
beginning of the pushing operation, but does not include any decarbonization periods.  
(z) "Cold cleaner" means a tank containing organic solvent with a volatile organic compound  
content of 5 % or more, by weight, and at a temperature below its boiling point that is used to  
spray, brush, flush, or immerse metallic or plastic, or both metallic and plastic objects, for the  
purpose of cleaning or degreasing.  
(aa) "Commercial location" means a publicly or privately owned place where persons are  
engaged in the exchange or sale of goods or services and multiple housing units designed for 3 or  
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more families, except for elementary and secondary schools and facilities owned and operated by  
this state. A separate building or group of buildings used for the exchange or sale of goods or  
services and having a single owner and manager constitutes a separate commercial location.  
(bb) "Completed organic resin" means organic resin solids, solvents, and additives as  
deliverable for sale or use, including a dry organic resin.  
(cc) "Compliance plan" means a description of the compliance status of a source with respect to  
all applicable requirements for each process or process equipment as follows:  
(i) For applicable requirements with which the source is in compliance, a statement that the  
source will continue to comply with the requirements.  
(ii) For applicable requirements that will become effective during the permit term, a statement  
that the source will meet the requirements on a timely basis.  
(iii) For applicable requirements for which the stationary source is not in compliance at the  
time of permit issuance, a narrative description of how the stationary source will achieve  
compliance with the requirements.  
(dd) "Component" means 1 of the following, but does not include a valve that is not externally  
regulated, that is, a valve that has no external controls and thus does not have the potential to  
leak a volatile organic compound:  
(i) As it pertains to the provisions of R 336.1622, component means any piece of equipment  
that has the potential to leak a volatile organic compound and includes all of the following:  
(A) Pump seals.  
(B) Compressor seals.  
(C) Seal oil degassing vents.  
(D) Pipeline valves.  
(E) Flanges and other connections.  
(F) Pressure-relief devices.  
(G) Process drains.  
(H) Open ended pipes.  
(ii) As it pertains to the provisions of R 336.1628, component means all of the following:  
(A) Compressor seals.  
(B) Process valves in light liquid or gaseous volatile organic compound service.  
(C) Pressure-relief valves in gaseous volatile organic compound service.  
(D) Seals of pumps in light liquid service.  
(iii) As it pertains to the provisions of R 336.1629, component means all of the following:  
(A) Compressor seals.  
(B) Process valves.  
(C) Pressure-relief valves.  
(D) Pump seals.  
(ee) "Component in field gas service" means a component that processes, transfers, or contains  
field gas.  
(ff) "Component in gaseous volatile organic compound service" means a component that  
processes, transfers, or contains a volatile organic compound in the gaseous phase under actual  
conditions.  
(gg) "Component in heavy liquid service" means a component that processes, transfers, or  
contains heavy liquid.  
(hh) "Component in light liquid volatile organic compound service" means a component that  
contacts a light liquid containing more than 10% volatile organic compound by weight.  
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(ii) "Component in liquid volatile organic compound service" means a component that  
processes, transfers, or contains a volatile organic compound in the liquid phase under actual  
conditions.  
(jj) "Condenser" means a device that effects the removal of an air contaminant from an exhaust  
stream by a physical change of state from a vapor to a liquid or solid form.  
(kk) "Control equipment" means air pollution control equipment.  
(ll) "Conventional air-atomizing spray equipment" means a device that is designed to atomize  
and direct fluid material solely through the use of compressed air and is capable of operating at  
air pressures of more than 10 pounds per square inch.  
(mm) "Conveyorized cold cleaner" means any continuous system that transports metallic or  
plastic, or both metallic and plastic objects through a bath containing organic solvent at a  
temperature below its boiling point for the purpose of cleaning or degreasing.  
(nn) "Conveyorized vapor degreaser" means any continuous system that transports metallic  
objects through or over, or through and over, a bath containing organic solvent that is heated to  
its boiling point for the purpose of cleaning or degreasing.  
(oo) "Cycle of operation," with respect to continuous emission monitoring systems, means the  
total time a monitoring system requires to sample, analyze, and record an emission measurement.  
R 336.1104 Definitions; D.  
Rule 104. As used in these rules:  
(a) "Decarbonization period," with respect to coke ovens, means the time for combusting  
carbon formed at the oven roof and in the standpipe assembly. The decarbonization period  
commences when a charging hole lid or lids or a standpipe lid or lids are removed or opened near  
the end of the coking cycle and ends with the initiation of the next charging period.  
(b) "Delivery vessel" means any tank truck, tank-equipped trailer, railroad tank car, or any  
similar vessel equipped with a storage tank used for the transport of a volatile organic compound  
from sources of supply to any stationary vessel.  
(c) "Demolition waste material" means waste building materials that result from demolition  
operations on houses and commercial and industrial buildings.  
(d) "Department" means the director of the department of environment, Great Lakes, and  
energy or the director’s designee.  
(e) "Difficult-to-monitor component" means a component that can only be monitored by  
elevating the monitoring personnel more than 6 feet above a support surface.  
(f) "Dispensing facility" means a location where gasoline is transferred to a motor vehicle tank  
from a stationary vessel.  
(g) "Dry organic resin" means the organic resin solids from which all liquids have been  
removed, as deliverable for sale or use.  
R 336.1113 Definitions; M.  
Rule 113. As used in these rules:  
(a) "Malfunction" means any sudden, infrequent and not reasonably preventable failure of a  
source, process, process equipment, or air pollution control equipment to operate in a normal or  
usual manner. Failures that are caused in part by poor maintenance or careless operation are not  
malfunctions.  
(b) "Market testing or market development" means the limited or general distribution of a  
product to the consumer to gather information concerning the demand for the product.  
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(c) "Material handling equipment," as referenced in table 31 of R 336.1331, means a device,  
contrivance, or equipment used to bag, blend, convey, crush, grind, load, mill, mix, shed, store,  
transfer, or unload a physical substance.  
(d) "Material recovery equipment" means any equipment utilized in the transport and recovery  
of styrene monomer and other impurities from other products and by-products in the  
manufacture of polystyrene resin by continuous process, including the styrene devolatilizer unit  
and styrene recovery unit.  
(e) “Minus water” means subtraction of water and compounds that are used as organic solvents  
and excluded from the definition of volatile organic compound.  
(f) "Modify" means making a physical change in, or change in the method of operation of,  
existing process or process equipment that increases the amount of any air contaminant emitted  
into the outer air that is not already allowed to be emitted under the conditions of a permit or  
order or results in the emission of any toxic air contaminant into the outer air not previously  
emitted. An increase in the hours of operation or an increase in the production rate up to the  
maximum capacity of the process or process equipment is not considered to be a change in the  
method of operation unless the process or process equipment is subject to enforceable permit  
conditions or enforceable orders that limit the production rate or the hours of operation, or both,  
to a level below the proposed increase.  
(g) "Motor vehicle" means any self-propelled vehicle registered for, or requiring registration  
for, use on the highway.  
(h) “Motor vehicle material” means coatings applied to motor vehicles or motor vehicle  
components at facilities that are not automobile or light-duty truck assembly coating facilities.  
R 336.1116 Definitions; P.  
Rule 116. As used in these rules:  
(a) "Packaging rotogravure printing" means rotogravure printing on a substrate that, in  
subsequent operations, is formed into a packaging product or label, or both.  
(b) "Paint manufacturing" means the grinding or mixing of a combination of pigments, resins,  
and liquids to produce a surface coating as listed in standard industrial classification code 2851.  
(c) "Particulate matter" means any air contaminant existing as a finely divided liquid or solid,  
other than uncombined water, as measured by a reference test specified in R 336.2004(5) or by  
an equivalent or alternative method.  
(d) "Perchloroethylene dry cleaning equipment" means equipment utilized in the cleaning of  
fabrics for which perchloroethylene (tetrachloroethylene) is the predominant cleaning medium.  
(e) "Performance test" means the taking of a source sample at a stationary source by employing  
department-approved methods to determine either of the following:  
(i) Compliance with the department's rules, orders, or emission limitations.  
(ii) Compliance with the conditions of a permit to install or renewable operating permit.  
(f) "Permit to install" means a permit issued by the department authorizing the construction,  
installation, relocation, or alteration of any process, fuel-burning, refuse-burning, or control  
equipment in accordance with approved plans and specifications.  
(g) "Permit to operate" means a permit issued by the department authorizing the use of any  
process, fuel-burning, refuse-burning, or control equipment for the period indicated after it has  
been demonstrated that it can be operated in compliance with these rules. The requirement to  
obtain a permit to operate was removed from these rules effective July 26, 1995. Permits to  
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operate issued before that date remain effective and legally enforceable unless they are voided  
pursuant to R 336.1201(6).  
(h) "Person" means any of the following:  
(i) An individual person.  
(ii) Trustee.  
(iii) Court-appointed representative.  
(iv) Syndicate.  
(v) Association.  
(vi) Partnership.  
(vii) Firm.  
(viii) Club.  
(ix) Company.  
(x) Corporation.  
(xi) Business trust.  
(xii) Institution.  
(xiii) Agency.  
(xiv) Government corporation.  
(xv) Municipal corporation.  
(xvi) City.  
(xvii) County.  
(xviii) Municipality.  
(xix) District.  
(xx) Other political subdivision, department, bureau, agency, or instrumentality of federal,  
state, or local government.  
(xxi) Other entity recognized by law as the subject of rights and duties.  
(i) "Petroleum" means the crude oil removed from the earth and the oils derived from tar sands,  
shale, and coal gasification or liquefaction.  
(j) "Petroleum refinery" means any facility engaged in producing gasoline, kerosene, distillate  
fuel oils, residual fuel oils, lubricants, or other products through distillation of petroleum or  
through redistillation, cracking, or the reforming of unfinished petroleum derivatives.  
(k) "PM-10" means particulate matter that has an aerodynamic diameter less than or equal to a  
nominal 10 micrometers, as measured by a reference test specified in 40 CFR part 51, appendix  
M, adopted by reference in R 336.1902. PM-10 emissions must include gaseous emissions from  
a source or activity that condense to form particulate matter at ambient temperatures. The  
condensable particulate matter must be accounted for in applicability determinations and in  
establishing emissions limitations for PM-10.  
(l) “PM 2.5” means particulate matter that has an aerodynamic diameter less than or equal to a  
nominal 2.5 micrometers, as measured by a reference test specified in 40 CFR part 51, appendix  
M, adopted by reference in R 336.1902. PM 2.5 emissions must include gaseous emissions from  
a source or activity that condense to form particulate matter at ambient temperatures. The  
condensable particulate matter must be accounted for in applicability determinations and in  
establishing emissions limitations for PM 2.5.  
(m) "Potential emissions" means those emissions expected to occur without control equipment,  
unless this control equipment is, aside from air pollution control requirements, vital to  
production of the normal product of the source or to its normal operation. Annual potential  
emissions must be based on the maximum annual-rated capacity of the source, unless the source  
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is subject to enforceable permit conditions or enforceable orders that limit the operating rate or  
the hours of operation, or both. Enforceable agreements or permit conditions on the type or  
amount of materials combusted or processed must be used in determining the potential emission  
rate of a source.  
(n) "Potential to emit" means the maximum capacity of a stationary source to emit an air  
contaminant under its physical and operational design. Any physical or operational limit on the  
capacity of the stationary source to emit an air contaminant, including air pollution control  
equipment and restrictions on the hours of operation or the type or amount of material  
combusted, stored, or processed, must be treated as part of its design only if the limit, or the  
effect it would have on emissions, is legally enforceable. Secondary emissions do not count in  
determining the potential to emit of a stationary source. For hazardous air pollutants that have  
been listed pursuant to section 112(b) of the clean air act, 42 USC 7412, quantifiable fugitive  
emissions must be included in determining the potential to emit of any stationary source. For all  
other air contaminants, quantifiable fugitive emissions must be included in determining the  
potential to emit of a stationary source only if the stationary source belongs to 1 of the following  
categories:  
(i) Coal cleaning plants that have thermal dryers.  
(ii) Kraft pulp mills.  
(iii) Portland cement plants.  
(iv) Primary zinc smelters.  
(v) Iron and steel mills.  
(vi) Primary aluminum ore reduction plants.  
(vii) Primary copper smelters.  
(viii) Municipal incinerators capable of charging more than 50 tons of refuse per day.  
(ix) Hydrofluoric, sulfuric, or nitric acid plants.  
(x) Petroleum refineries.  
(xi) Lime plants.  
(xii) Phosphate rock processing plants.  
(xiii) Coke oven batteries.  
(xiv) Sulfur recovery plants.  
(xv) Carbon black plants that have a furnace process.  
(xvi) Primary lead smelters.  
(xvii) Fuel conversion plants.  
(xviii) Sintering plants.  
(xix) Secondary metal production plants.  
(xx) Chemical process plants. The term chemical process plant does not include ethanol  
production facilities that produce ethanol by natural fermentation included in North American  
industrial classification system codes 325193 or 312140.  
(xxi) Fossil fuel boilers, or combination thereof, totaling more than 250,000,000 Btu per hour  
heat input.  
(xxii) Petroleum storage and transfer units that have a total storage capacity of more than  
300,000 barrels or petroleum storage vessels that have a capacity of more than 40,000 gallons.  
(xxiii) Taconite ore processing plants.  
(xxiv) Glass-fiber processing plants.  
(xxv) Charcoal production plants.  
(xxvi) Fossil fuel-fired steam electric plants of more than 250,000,000 Btu per hour heat input.  
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(xxvii) Asphalt concrete plants.  
(xxviii) Secondary lead smelters and refineries.  
(xxix) Sewage treatment plants.  
(xxx) Phosphate fertilizer plants.  
(xxxi) Ferroalloy production plants.  
(xxxii) Grain elevators.  
(xxxiii) Stationary gas turbines.  
(xxxiv) Stationary sources that are subject to the Federal National Emission Standards for  
Hazardous Air Pollutants for the following materials:  
(A) Asbestos.  
(B) Beryllium.  
(C) Mercury.  
(D) Vinyl chloride.  
(o) "PPM" means parts per million, by volume.  
(p) "Printed interior panel" means a panel that has its grain or natural surface obscured by fillers  
and basecoats and on which a simulated grain or decorative pattern is printed.  
(q) "Process" means an action, operation, or a series of actions or operations at a source that  
emits or has the potential to emit an air contaminant. Examples of a process include any of the  
following:  
(i) A physical change of a material.  
(ii) A chemical change of a material.  
(iii) The combustion of fuel, refuse, or waste material.  
(iv) The storage of a material.  
(v) The handling of a material.  
(r) "Process equipment" means all equipment, devices, and auxiliary components, including air  
pollution control equipment, stacks, and other emission points, used in a process.  
(s) "Process unit turnaround" means the scheduled shutdown of a refinery process unit for the  
purpose of inspection or maintenance of the unit.  
(t) "Production equipment exhaust system" means a device for collecting and removing, from  
the immediate area, fugitive air contaminants from any process equipment.  
(u) "Psia" means pounds per square inch absolute.  
(v) "Publication rotogravure printing" means rotogravure printing on a substrate that is  
subsequently formed into any of the following:  
(i) Book.  
(ii) Magazine.  
(iii) Catalogue.  
(iv) Brochure.  
(v) Directory.  
(vi) Newspaper.  
(vii) Supplement.  
(viii) Other type of printed material.  
(w) "Pushing operation," with respect to coke ovens, means the movement of the coke from a  
coke oven into the coke-receiving car.  
(x) "Pushside," with respect to a coke oven, means that side of the coke oven that is adjacent to  
the pushing machine.  
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R 336.1119 Definitions; S.  
Rule 119. As used in these rules:  
(a) "Schedule of compliance" means, for purposes of R 336.1201 to R 336.1218, all of the  
following:  
(i) For a source not in compliance with all applicable requirements at the time of issuance of a  
renewable operating permit, a schedule of remedial measures, including an enforceable sequence  
of actions or operations that specifies milestones, leading to compliance with an applicable  
requirement, and a schedule for submission of certified progress reports, not less than every 6  
months. The schedule must resemble, and be as stringent as, a schedule contained in a judicial  
consent decree or administrative order to which the source is subject. A schedule must be  
supplemental to, and not sanction noncompliance with, the applicable requirement on which it is  
based.  
(ii) For a source in compliance with all applicable requirements at the time of issuance of a  
renewable operating permit, a statement that the source will continue to comply with the  
requirements.  
(iii) With respect to any applicable requirement that has a future effective compliance date that is  
after the date of issuance and before the date of expiration of the renewable operating permit, the  
schedule of compliance must contain a statement that the source will meet the requirement on a  
timely basis, unless the underlying applicable requirement requires a more detailed schedule.  
(b) "Secondary emissions" means emissions that occur as a result of the construction or  
operation of a stationary source, but do not come from the stationary source itself. Secondary  
emissions include only emissions that are specific, well-defined, quantifiable, and impact the  
same general area as the stationary source which causes the secondary emissions. Secondary  
emissions also include emissions from any off-site support facility that would not otherwise be  
constructed or increase its emissions except as a result of the construction or operation of the  
stationary source. Examples of secondary emissions include the following:  
(i) Emissions from ships or trains coming to or going from a stationary source.  
(ii) Emissions from any off-site support facility that would not otherwise be constructed or  
increase its emissions except as a result of the construction or operation of the stationary source.  
(c) "Secondary risk screening level" means the concentration of a possible, probable, or known  
human carcinogen in ambient air that is calculated, for regulatory purposes, according to the risk  
assessment procedures in R 336.1229(1), to produce an estimated upper-bound lifetime cancer risk  
of 1 in 100,000.  
(d) "Shutdown" means the cessation of operation of a source for any purpose.  
(e) "Significant" means a rate of emissions for the following air contaminants that would equal  
or exceed any of the following:  
(i) Carbon monoxide - 100 tons per year.  
(ii) Oxides of nitrogen - 40 tons per year.  
(iii) Sulfur dioxide - 40 tons per year.  
(iv) Particulate matter - 25 tons per year.  
(v) PM-10 - 15 tons per year.  
(vi) PM 2.5 - 10 tons per year, 40 tons per year of sulfur dioxide, or 40 tons per year of oxides  
of nitrogen.  
(vii) Volatile organic compounds - 40 tons per year.  
(viii) Lead - 0.6 tons per year.  
(ix) Fluorides - 3 tons per year.  
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(x) Sulfuric acid mist - 7 tons per year.  
(xi) Hydrogen sulfide - 10 tons per year.  
(xii) Total reduced sulfur, including hydrogen sulfide - 10 tons per year.  
(xiii) Reduced sulfur compounds, including hydrogen sulfide - 10 tons per year.  
(xiv) Municipal waste combustor organics, measured as total tetra- through octa-chlorinated  
dibenzo-p-dioxins and dibenzofurans - 3.2x10-6 megagrams per year or 3.2x10-6 tons per year.  
(xv) Municipal waste combustor metals, measured as particulate matter – 14 megagrams per  
year or 15 tons per year.  
(xvi) Municipal waste combustor acid gases, measured as sulfur dioxide and hydrogen chloride  
- 36 megagrams per year or 40 tons per year.  
(xvii) Municipal solid waste landfill emissions, measured as nonmethane organic compounds -  
45 megagrams per year or 50 tons per year.  
(f) "Smoke" means small gas and airborne particles consisting essentially of carbonaceous  
material in sufficient numbers to be observable.  
(g) "Sour condensate" means a condensate that emits sour gas at atmospheric pressure.  
(h) "Sour crude" means a crude oil that emits sour gas at atmospheric pressure.  
(i) "Sour gas" means any gas containing more than 1 grain of hydrogen sulfide or more than 10  
grains of total sulfur per 100 standard cubic feet.  
(j) "Source sample" means any raw material, fuel, product, by-product, waste material, exhaust  
gas, air contaminant, flora, soil, or other material existing as a gas, liquid, or solid, which is  
captured, retained, or collected from a stationary source.  
(k) Reserved.  
(l) "Stack" or "chimney" means a flue, conduit, or duct arranged to conduct a gas stream to the  
outer air.  
(m) "Standard conditions" means a gas temperature of 70 degrees Fahrenheit and a gas pressure  
of 29.92 inches of mercury absolute.  
(n) "Standpipe assembly," with respect to coke ovens, means the riser, standpipe lid, and the  
gooseneck.  
(o) "Standpipe assembly emission point," with respect to a coke oven battery equipped with a  
single collector main or a double collector main, means the flexible connection between the  
battery top and the base of the riser, the seating surface of the standpipe lid, and the second  
flexible connection wherever located, or another agreed upon connection that is located between  
the collector main and the gooseneck. With respect to a battery equipped with a charging main  
and a gas-offtake main in tandem, standpipe assembly emission point means the upper flange,  
the lower flange, the top lid, the bottom lid, the upper sand seal, the middle sand seal, and the  
lower base sand seal. With respect to a battery equipped with a jumper pipe ministandpipe,  
standpipe assembly emission point means the flexible connection between the battery top and the  
base of the riser, the seating surface of the standpipe lid, the flexible connection between the  
collector main and the gooseneck, the ministandpipe lid, and the flexible connection between the  
battery top and the jumper pipe ministandpipe.  
(p) "Start-up" means the setting in operation of a process or process equipment for any purpose.  
(q) “State-only enforceable” means that the limitation or condition is derived solely from the act  
and the air pollution control rules and is not federally enforceable. State-only enforceable  
requirements include R 336.1224, R 336.1225, R 336.1901, any permit requirement established  
solely pursuant to R 366.1201(1)(b), or another regulation that is enforceable solely under the act  
and is not federally enforceable.  
12  
(r) "Stationary source" means all buildings, structures, facilities, or installations that emit or  
have the potential to emit 1 or more air contaminants, are located at 1 or more contiguous or  
adjacent properties, are under the control of the same person, and have the same 2-digit major  
group code associated with their primary activity. In addition, a stationary source includes  
buildings, structures, facilities, or installations that emit or have the potential to emit 1 or more  
air contaminants, are located at 1 or more contiguous or adjacent properties, are under the control  
of the same person, and have a different 2-digit major group code, but support the primary  
activity. Buildings, structures, facilities, or installations are considered to support the primary  
activity if 50% or more of their output is dedicated to the primary activity. Major group codes  
and primary activities are described in the standard industrial classification manual.  
Notwithstanding the provisions of this subdivision, research and development activities, as  
described in R 336.1118, may be treated as a separate stationary source, unless the research and  
development activities support the primary activity of the stationary source.  
(s) "Stationary vessel" means any tank, reservoir, or container used for the storage of any  
volatile organic compound that is not used to transport volatile organic compounds and no  
manufacturing process or part thereof takes place.  
(t) "Stencil coat" means a coating that is applied over a stencil to a plastic part at a thickness of  
1 mil or less of coating solids. Stencil coats are most frequently letters, numbers, or decorative  
designs.  
(u) "Styrene devolatilizer unit" means equipment performing the function of separating  
unreacted styrene monomer and other volatile components from polystyrene in a vacuum  
devolatilizer.  
(v) "Styrene recovery unit" means equipment performing the function of separating styrene  
monomer from other less volatile components of the styrene devolatilizer unit's output. The  
separated styrene monomer may be reused as raw material in the manufacturing of polystyrene  
resin.  
(w) "Submerged fill pipe" means any fill pipe that has its discharge opening entirely submerged  
when the liquid level is 6 inches above the bottom of the vessel or, when applied to a vessel that  
is loaded from the side, means either of the following:  
(i) Any fill pipe that has its discharge opening entirely submerged when the liquid level is 18  
inches above the bottom of the vessel.  
(ii) Any fill pipe that has its discharge opening entirely submerged when the liquid level is  
twice the diameter of the fill pipe above the bottom of the vessel, but the top of the submerged  
fill pipe must not be more than 36 inches above the bottom of the vessel.  
(x) "Sufficient evidence," a term of art, means either of the following:  
(i) In human epidemiological studies, that the data indicates that there is a causal relationship  
between the agent and human cancer.  
(ii) In animal studies, the data suggests that there is an increased incidence of malignant tumors  
or combined malignant and benign tumors in any of the following:  
(A) Multiple species or strains.  
(B) Multiple experiments.  
(C) To an unusual degree in a single experiment with regard to high incidence, unusual site or  
type of tumor, or early age at onset.  
(y) "Sulfuric acid plant" means any facility producing sulfuric acid by the contact process by  
burning elemental sulfur, alkylation acid, hydrogen sulfide, or acid sludge, but does not include  
13  
facilities where conversion to sulfuric acid is utilized primarily as a means of preventing  
emissions to the atmosphere of sulfur dioxide or other sulfur compounds.  
(z) "Surface coating" means any paint, lacquer, varnish, ink, adhesive, or other coating material  
applied on a surface.  
(aa) "Sweet condensate" means any condensate that is not a sour condensate.  
(bb) "Sweet crude" means any crude oil that is not a sour crude.  
(cc) "Sweetening facility" means a facility or process that removes hydrogen sulfide or sulfur-  
containing compounds, or both, from a sour gas, sour crude oil, or sour condensate stream and  
converts it to sweet gas, sweet crude, or sweet condensate. The term sweetening facility does not  
include a facility or process that operates in an enclosed system and does not emit hydrogen  
sulfide to the outer air.  
(dd) "Sweet gas" means any gas that is not a sour gas.  
(ee) “Synthetic natural gas” means any manufactured fuel gas of approximately the same  
composition and heating value as that obtained naturally from geological formations beneath the  
Earth’s surface.  
(ff) "Synthetic organic chemical and polymer manufacturing plant" means a stationary source  
where the production, as intermediates or final products, of 1 or more of the following chemicals  
takes place:  
(i) Methyl tert-butyl ether.  
(ii) Polyethylene.  
(iii) Polypropylene.  
(iv) Polystyrene.  
(v) Synthetic organic chemicals listed in "Standards of Performance for Equipment Leaks of  
VOC in the Synthetic Organic Chemicals Manufacturing Industry," 40 CFR part 60, subpart VV,  
adopted by reference in R 336.1902.  
(gg) "Synthetic organic chemical and polymer manufacturing process unit" means all process  
equipment assembled to manufacture, as intermediates or final products, 1 or more of the  
chemicals listed in the definition of synthetic organic chemical and polymer manufacturing plant.  
A synthetic organic chemical and polymer manufacturing process unit can operate independently  
if supplied with sufficient feed or raw materials and sufficient storage facilities for the product.  
R 336.1120 Definitions; T.  
Rule 120. As used in these rules:  
(a) "Temporary source" means a stationary source, process, or process equipment that  
commences operation and is located at a geographic site for not more than 12 consecutive  
months.  
(b) "Texture coat" means a coating that is applied to a plastic part which, in its finished form,  
consists of discrete raised spots of the coating.  
(c) "Thin particleboard" means a manufactured board that is 1/4 of an inch or less in thickness  
and is made of individual wood particles that have been coated with a binder and formed into flat  
sheets by pressure.  
(d) "Thinning tank," as it pertains to R 336.1631, means any vessel that receives resin from a  
reactor and to which solvents or other materials are added to thin the resin.  
(e) "Tileboard" means paneling that has a colored, waterproof surface coating.  
(f) "Toxic air contaminant" means any air contaminant for which there is no national ambient  
air quality standard and is or may become harmful to public health or the environment when  
14  
present in the outdoor atmosphere in sufficient quantities and duration. For the purpose of this  
definition, the following substances are not considered toxic air contaminants:  
(i) Acetylene.  
(ii) Animal or plant materials, including extracts and concentrates thereof, used as ingredients  
in food products or dietary supplements in accordance with applicable regulations of the United  
States Food and Drug Administration.  
(iii) Argon.  
(iv) Calcium carbonate.  
(v) Calcium hydroxide.  
(vi) Calcium oxide.  
(vii) Calcium silicate.  
(viii) Calcium sulfate.  
(ix) Carbon dioxide.  
(x) Carbon monoxide.  
(xi) Cellulose.  
(xii) Crystalline silica emissions from any of the following processes:  
(A) Extraction and processing of all metallic or non-metallic minerals.  
(B) Sand production, processing, and drying.  
(C) Asphalt production.  
(D) Concrete production.  
(E) Glass and fiberglass manufacturing.  
(F) Foundries.  
(G) Foundry residual recovery activities.  
(xiii) Dipropylene glycol  
(xiv) Emery (corundite).  
(xv) Ethane.  
(xivi) Graphite (synthetic).  
(xvii) Grain dust.  
(xvii) Helium.  
(xix) Hydrogen.  
(xx) Iron oxide.  
(xxi) Lead.  
(xxii) Liquefied petroleum gas (l.p.g.).  
(xxiii) Methane.  
(xxiv) Neon.  
(xxv) Nitrogen.  
(xxvi) Nitrogen oxides.  
(xxvii) Oxygen.  
(xxviii) Ozone.  
(xxix) Perlite.  
(xxx) Portland cement.  
(xxxi) Propane.  
(xxxii) Propylene glycol.  
(xxxiii) Silicon.  
(xxxiv) Starch.  
(xxxv) Sucrose.  
15  
(xxxvi) Sulfur dioxide.  
(xxxvii) Vegetable oil mist.  
(xxxviii) Water vapor.  
(xxxix) Zinc metal dust.  
(g) "Toxicological interaction" means the simultaneous exposure to 2 or more hazardous  
substances that together produce a toxicological response that is greater or less than what their  
individual responses would be.  
(h) "Transfer efficiency" means the percentage of coating solids material that leaves the coating  
applicator and remains on the surface of the product.  
(i) "True vapor pressure" means the equilibrium partial pressure exerted by a liquid or the sum  
of partial pressures exerted by a mixture of liquids. For refined petroleum stock, such as  
gasolines and naphthas, and crude oil, the true vapor pressure may be determined in accordance  
with methods described in American petroleum institute MPMS C19 S2, "Manual of Petroleum  
Measurement Standards, Chapter 19, Evaporative Loss Measurements, Section 2, Evaporative  
Loss from Floating-roof Tanks," adopted by reference in R 336.1902.  
R 336.1122 Definitions; V.  
Rule 122. As used in these rules:  
(a) "Vacuum-metalizing coatings" means topcoats and basecoats that are used in the vacuum-  
metalizing process.  
(b) "Vacuum-producing system" means any device that creates a pressure below atmospheric,  
such as a pump or steam ejector with condenser, including hot wells and accumulators.  
(c) "Vapor collection system," as it pertains to R 336.1627, means all piping, seals, hoses,  
connections, pressure-vacuum vents, and equipment between and including the delivery vessel  
and a stationary vessel, vapor processing unit, or vapor holder.  
(d) [Reserved]  
(e) "Visible emission" means any emissions that are visually detectable without the aid of  
instruments.  
(f) "Volatile organic compound" means any compound of carbon or mixture of compounds of  
carbon that participates in photochemical reactions, excluding the following materials, all of  
which have been determined by the United States Environmental Protection Agency to have  
negligible photochemical reactivity:  
(i) Carbon monoxide (CAS No. 630-08-0).  
(ii) Carbon dioxide (CAS No. 124-38-9).  
(iii) Carbonic acid (CAS No. 463-79-6).  
(iv) Metallic carbides or carbonates (CAS No. not applicable).  
(v) Boron carbide (CAS No. 12069-32-8 or 60063-34-5).  
(vi) Silicon carbide (CAS No. 409-21-2 or 12327-32-1).  
(vii) Ammonium carbonate (CAS No. 10361-29-2 or 506-87-6).  
(viii) Ammonium bicarbonate (CAS No. 1066-33-7).  
(ix) Methane (CAS No. 74-82-8).  
(x) Ethane (CAS No. 74-84-0).  
(xi) The methyl chloroform (CAS No. 71-55-6) portion of commercial grades of methyl  
chloroform, if all of the following provisions are complied with:  
(A) The commercial grade of methyl chloroform is used only in a surface coating or coating  
line that is subject to the requirements part 6 or 7 of these rules.  
16  
(B) The commercial grade of methyl chloroform contains no stabilizers other than those listed  
in table 11.  
(C) Compliance with the applicable limits specified in parts 6 or 7 of these rules is otherwise  
not technically or economically reasonable.  
(D) All measures to reduce the levels of all organic solvents, including the commercial grade  
of methyl chloroform, from the surface coating or coating line to the lowest reasonable level, are  
implemented.  
(E) The emissions of the commercial grade of methyl chloroform do not result in a maximum  
ambient air concentration exceeding any of the allowable ambient air concentrations listed in  
table 11.  
(F) The use of the commercial grade of methyl chloroform is specifically identified and  
allowed by a permit to install, permit to operate, or order of the department.  
(G) Table 11 reads as follows:  
TABLE 11.  
Commercial Grade of Methyl Chloroform -- Allowable Ambient Air Concentrations  
Compound  
Ppm1  
Time2  
Methyl chloroform  
Tertiary butyl alcohol3  
Secondary butyl alcohol3  
Methylal3  
3.5  
1.0  
1.0  
10.0  
0.028  
and  
1 hour  
1 hour  
1 hour  
1 hour  
1 hour  
1,2-butylene oxide3  
0.00041  
annual  
1
Parts per million, by volume  
Averaging time period  
This compound is a stabilizer  
2
3
(xii) The methyl chloroform (CAS No. 71-55-6) portion of commercial grades of methyl  
chloroform that contain another stabilizer not listed in table 11 of this rule, if all of the following  
provisions are complied with:  
(A) The commercial grade of methyl chloroform is used only in a surface coating or coating  
line that is subject to the requirements of parts 6 or 7 of these rules.  
(B) Compliance with the applicable limits specified in parts 6 or 7 of these rules is otherwise  
not technically or economically reasonable.  
(C) All measures to reduce the levels of all organic solvents, including the commercial grade  
of methyl chloroform, from the surface coating or coating line to the lowest reasonable level are  
implemented.  
(D) The emissions of any compound in the commercial grade of methyl chloroform that is  
listed in table 11 of this rule do not result in a maximum ambient air concentration exceeding any  
of the allowable ambient air concentrations listed in table 11.  
(E) The emission of all compounds in the commercial grade of methyl chloroform that are not  
listed in table 11 is demonstrated to comply with R 336.1901.  
17  
(F) The use of the commercial grade of methyl chloroform is specifically identified and  
allowed by a permit to install, permit to operate, or order of the department.  
(xiii) Acetone (CAS No. 67-64-1).  
(xiv) Cyclic, branched, or linear completely methylated siloxanes (CAS Nos. include 107-45-  
0, 107-51-7, 141-62-8, 141-63-9, 107-63-9, 63148-62-9, 541-05-9, 556-67-2, 541-02-6, 540-97-  
6, 69430-24-6, 17928-28-8, 3555-47-3).  
(xv) Parachlorobenzotrifluoride (CAS No. 98-56-6).  
(xvi) Perchloroethylene (CAS No. 127-18-4).  
(xvii) Trichlorofluoromethane (CFC-11) (CAS No. 75-69-4).  
(xviii) Dichlorodifluoromethane (CFC-12) (CAS No. 75-71-8).  
(xix) 1,1,2-trichloro-1,2,2-trifluoroethane (CFC-113) (CAS No. 76-13-1).  
(xx) 1,2-dichloro 1,1,2,2-tetrafluoroethane (CFC-114) (CAS No. 76-14-2).  
(xxi) Chloropentafluoroethane (CFC-115) (CAS No. 76-15-3).  
(xxii) 1,1-dichloro 1-fluoroethane (HCFC-141b) (CAS No. 1717-00-6).  
(xxiii) 1,chloro 1,1-difluoroethane (HCFC-142b) (CAS No. 75-68-3).  
(xxiv) Chlorodifluoromethane (HCFC-22) (CAS No. 75-45-6).  
(xxv) 1,1,1-trifluoro 2,2-dichloroethane (HCFC-123) (CAS No. 306-83-2).  
(xxvi) 2-chloro-1,1,1,2-tetrafluoroethane (HCFC-124) (CAS No. 2837-89-0).  
(xxvii) Trifluoromethane (HFC-23) (CAS No. 75-46-7).  
(xxviii) Pentafluoroethane (HFC-125) (CAS No. 354-33-6).  
(xxix) 1,1,2,2-tetrafluoroethane (HFC-134) (CAS No. 359-35-3).  
(xxx) 1,1,1,2-tetrafluoroethane (HFC-134a) (CAS No. 811-97-2).  
(xxxi) 1,1,1-trifluoroethane (HFC-143a) (CAS No. 420-46-2).  
(xxxii) 1,1-difluoroethane (HFC-152a) (CAS No. 75-37-6).  
(xxxiii) 3,3-dichloro-1, 1,1,2,2-pentafluoropropane (HCFC-225ca) (CAS No. 422-56-0).  
(xxxiv) 1,3-dichloro-1,1,2,2,3-pentafluoropropane (HCFC-225cb) (CAS No. 507-55-1).  
(xxxv) 1,1,1,2,3,4,4,5,5,5-decafluoropentane (HFC 43-10mee) (CAS No. 138495-42-8).  
(xxxvi) Difluoromethane (HFC-32) (CAS No. 75-10-5).  
(xxxvii) Ethyl fluoride (HFC-161) (CAS No. 353-36-6).  
(xxxviii) 1,1,1,3,3,3-hexafluoropropane (HFC-236fa) (CAS No. 690-39-1).  
(xxxix) 1,1,2,2,3-pentafluoropropane (HFC-245ca) (CAS No. 679-86-7).  
(xl) 1,1,2,3,3- pentafluoropropane ( HFC-245ea) (CAS No. 24270-66-4).  
(xli) 1,1,1,2,3- pentafluoropropane (HFC-245eb) (CAS No. 431-31-2).  
(xlii) 1,1,1,3,3- pentafluoropropane (HFC-245fa) (CAS No. 460-73-1).  
(xliii) 1,1,1,2,3,3-hexafluoropropane (HFC-236ea) (CAS No. 431-63-0).  
(xliv) 1,1,1,3,3-pentafluorobutane (HFC365mfc) (CAS No. 406-58-6).  
(xlv) Chlorofluoromethane (HCFC-31) (CAS No. 593-70-4).  
(xlvi) 1,2-dichloro-1,1,2-trifluoroethane (HCFC-123a) (CAS No. 354-23-4).  
(xlvii) 1-chlor-1-fluoroethane (HCFC-151a) (CAS No. 1615-75-4).  
(xlviii) 1,1,1,2,2,3,3,4,4-nonafluoro-4-methoxy-butane (C4F9OCH3 or HFE-7100)  
(CAS No. 163702-07-6).  
(xlix) 2-(difluoromethoxymethyl)-1,1,1,2,3,3,3-heptafluoropropane (CAS No. 163702-08-7).  
(l) 1-ethoxy-1,1,2,2,3,3,4,4,4-nonafluorobutane (C4F9OC2H5 or HFE-7200)  
(CAS No. 163702-05-4).  
(li) 2-(ethoxydifluoromethyl)-1,1,1,2,3,3,3-heptafluoropropane (CAS No. 163702-06-5).  
(lii) Methyl acetate (CAS No. 79-20-9).  
18  
(liii) Perfluorocarbon compounds that fall into the following classes:  
(A) Cyclic, branched, or linear, completely fluorinated alkanes.  
(B) Cyclic, branched, or linear, completely fluorinated ethers with no unsaturations.  
(C) Cyclic, branched, or linear, completely fluorinated tertiary amines with no unsaturations.  
(D) Sulfur-containing perfluorocarbons with no unsaturations and with sulfur bonds only to  
carbon and fluorine.  
(liv) Methylene chloride (CAS No. 75-09-2).  
(lv) 1,1,1,2,2,3,3-heptafluoro-3-methoxy-propane (n-C3F7OCH3, HFE-7000)  
(CAS No. 375-03-1).  
(lvi) 3-ethoxy-1,1,1,2,3,4,4,5,5,6,6,6-dodecafluoro-2-(trifluoromethyl) hexane (HFE 7500)  
(CAS No. 297730-93-9).  
(lvii) 1,1,1,2,3,3,3-heptafluoropropane (HFC 227ea) (CAS No. 431-89-0).  
(lviii) Methyl formate (HCOOCH3) (CAS No. 107-31-3).  
(lix) T-butyl acetate (CAS No. 540-88-5).  
(lx) 1,1,1,2,2,3,4,5,5,5-decafluoro-3-methoxy-4-trifluoromethyl-pentane (HFE-7300)  
(CAS No. 132182-92-4).  
(lxi) Dimethyl carbonate (CAS No. 616-38-6).  
(lxii) Propylene carbonate (CAS No. 108-32-7).  
(lxiii) 2,3,3,3-tetrafluoropropene (HFO–1234yf) (CAS No. 754-12-1).  
(lxiv) Trans-1,3,3,3-tetrafluoropropene (HFO–1234ze) (CAS No. 29118-24-9).  
(lxv) HCF2OCF2H (HFE-134) (CAS No. 1691-17-4).  
(lxvi) HCF2OCF2OCF2H (HFE-236cal2) (CAS No. 78522-47-1).  
(lxvii) HCF2OCF2CF2OCF2H (HFE-338pcc13) (CAS No. 188690-78-0).  
(lxviii) HCF2OCF2OCF2CF2OCF2H (H-Galden 1040X or H-Galden ZT 130 (or 150 or 180))  
(CAS No. 188690-77-9).  
(lxix) Trans 1-chloro-3,3,3-trifluoroprop-1-ene (SolsticeTM 1233zd(E))  
(CAS No. 102687-65-0).  
(lxx) 2-amino-2-methyl-1-propanol (AMP) (CAS No. 124-68-5).  
(lxxi) 1,1,2,2-Tetrafluoro-1,-(2,2,2-trifluoroethoxy) ethane (HFE-347pcf2) (CAS No. 406-78-  
0).  
(lxxii) cis-1,1,1,4,4,4-hexafluorobut-2-ene (HFO-1336mzz-Z) (CAS No. 692-49-9).  
(lxxiii) trans-1,1,1,4,4,4-hexafluorobut-2-ene (HFO-1336mzz(E)) (CAS No. 66711-86-2).  
The methods described in R 336.2004 and R 336.2040 must be used for measuring volatile  
organic compounds for purposes of determining compliance with emission limits. Where a  
method also measures compounds with negligible photochemical reactivity, these negligibly-  
photochemical reactive compounds may be excluded as volatile organic compounds if the  
amount of the compounds is accurately quantified and the exclusion is approved by the  
department.  
;