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R307. Environmental Quality, Air Quality. 

R307-350. Miscellaneous Metal Parts and Products 

Coatings. 

R307-350-1. Purpose. 

The purpose of R307-350 is to limit volatile organic 

compound (VOC) emissions from miscellaneous metal parts 

and products coating operations. 

R307-350-2. Applicability. 

(1) R307-350 applies to sources located in Cache, 

Davis, Salt Lake, Utah and Weber counties where the potential 

to emit voe emissions from all miscellaneous metal product 

parts surface coating operations, including related cleaning 

activities, is 2. 7 tons per year or more. 

(2) In Box Elder and Tooele counties, R307-350 

applies to the following sources: 

(a) Existing sources as ofFebruary l, 2013, with the 

potential to emit 5 tons per year or more of voe, including 

related cleaning activities; and 

(b) New sources as of February l, 2013, that have 

the potential to emit 2.7 tons per year or more of voe, 

including related cleaning activities. 

(3) R307-350 applies to, but is not limited to, the 

following industries: 

(a) Large farm machinery (harvesting, fertilizing, 

planting, tractors, combines, etc.); 

(b) Small farm machinery (lawn and garden tractors, 

lawn mowers, rototillers, etc.) 

(c) Small appliance (fans, mixers, blenders, crock 

pots, vacuum cleaners, etc.); 

( d) Commercial machinery (computers, typewriters, 

calculators, vending machines, etc.); 

( e) Industrial machinery (pumps, compressors, 

conveyor components, fans, blowers, transformers, etc.); 

(f) Fabricated metal products (metal covered doors, 

frames, trailer frames, etc.); and 

(g) Any other industrial category that coats metal 

parts or products under the standard Industrial Classification 

Code of major group 33 (primary metal industries), major 

group 34 (fabricated metal products), major group 35 

(nonelectric machinery), major group 36 (electrical machinery), 

major group 37 (transportation equipment) major group 38 

(miscellaneous instruments), and major group 39 

(miscellaneous manufacturing industries). 

R307-350-3. Exemptions. 

(1) The requirements of R307-350 do not apply to 

the following: 

(a) The surface coating of automobiles and lightduty trucks; 

(b) Flat metal sheets and strips in the form of rolls or 

coils; 

( c) Surface coating of aerospace vehicles and 

components; 

( d) Automobile refinishing; 

( e) The exterior of marine vessels; 

(f) Customized top coating of automobiles and 

trucks if production is less than 35 vehicles per day; 

(g) Military munitions manufactured by or for the 

Armed Forces of the United States; 

(h) Operations that are exclusively covered by 

Department of Defense military technical data and performed 

by a Department of Defense contractor and/or on site at 

installations owned and/or operated by the United States 

Armed Forces; or 

(i) Stripping of cured coatings and adhesives. 

(2) The requirements ofR307-350-5 do not apply to 

the following: 

coatings; 

coating. 

(a) Stencil coatings; 

(b) Safety-indicating coatings; 

(c) Solid-film lubricants; 

( d) Electric-insulating and thermal-conducting 

(e) Magnetic data storage disk coatings; or 

(f) Plastic extruded onto metal parts to form a 

(3) The requirements ofR307-350-6 do not apply to 

the following: 

(a) Touch-up coatings; 

(b) Repair coatings; or 

(c) Textured finishes. 

R307-350-4. Definitions. 

The following additional definitions apply to R307-

350: 

"Aerospace vehicles and component" means any 

fabricated part, processed part, assembly of parts, or completed 

unit, with the exception of electronic components, of any 

aircraft including but not limited to airplanes, helicopters, 

missiles, rockets and space vehicles. 

"Air dried coating" means coatings that are dried by 

the use of air or a forced warm air at temperatures up to 194 

degrees Fahrenheit. 

"Baked coating" means coatings that are cured at a 

temperature at or above 194 degrees Fahrenheit. 

"Camouflage coating" means coatings that are used, 

principally by the military, to conceal equipment from 

detection. 

"Coating" means a material applied to a substrate for 

decorative, protective, or functional purposes. 

(1) Such materials include, but are not limited to, 

paints, sealants, liquid plastic coatings, caulks, inks, adhesives, 

and maskants. 

(2) Decorative, protective, or functional materials 

that consist only of protective oils for metal, acids, bases, or 

any combination of these substances, or paper film or plastic 

film which may be pre-coated with an adhesive by the film 

manufacturer, are not considered coatings. 

"Coating application System" means all operations 

and equipment that applies, conveys, and dries a surface 

coating, including, but not limited to, spray booths, flow 

coaters, flash off areas, air dryers and ovens. 

"Cured coating or adhesive" means a coating or 

adhesive, which is dry to the touch. 

"Department of Defense military technical data" 

means a specification that specifies design requirements, such 
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as materials to be used, how a requirement is to be achieved, or 

how an item is to be fabricated or constructed. 

"Dip coating" means a method of applying coatings 

to a substrate by submersion into and removal from a coating 

bath. 

"Electric-insulating varnish" means a nonconvertible-type coating applied to electric motors, components 

of electric motors, or power transformers, to provide electrical, 

mechanical, and environmental protection or resistance. 

"Electric-insulating and thermal-conducting" means a 

coating that displays an electrical insulation of at least I 000 

volts DC per mil on a flat test plate and an average thermal 

conductivity of at least 0.27 BTU per hour-foot-degreeFahrenheit. 

"Electrostatic application" means a method of 

applying coating particles or coating droplets to a grounded 

substrate by electrically charging them. 

"Etching filler" mean a coating that contains less than 

23% solids by weight and at least 0.5% acid by weight, and is 

used instead of applying a pretreatment coating followed by a 

primer. 

"Extreme high-gloss coating" means a coating which, 

when tested by the American Society for Testing Material 

(ASTM) Test Method D-523 adopted in 1980, shows a 

reflectance of75 or more on a 60 degree meter. 

"Extreme performance coatings" means coatings 

designed for harsh exposure or extreme environmental 

conditions. 

"Flow coat" means a non-atomized technique of 

applying coatings to a substrate with a fluid nozzle in a fan 

pattern with no air supplied to the nozzle. 

"Heat-resistant coating" means a coating that must 

withstand a temperature of at least 400 degrees Fahrenheit 

during normal use. 

"High-performance architectural coating" means a 

coating used to protect architectural subsections and which 

meets the requirements of the Architectural Aluminum 

Manufacturer Association's publication number AAMA 605.2-

1980. 

"High-temperature coating" means a coating that is 

certified to with-stand a temperature of 1,000 degrees 

Fahrenheit for 24 hours. 

"High-volume, low-pressure (HVLP) spray" means a 

coating application system which is designed to be operated 

and which is operated between 0.1 and IO pounds per square 

inch gauge (psig) air pressure, measured dynamically at the 

center of the air cap and the air horns. 

"Magnetic data storage disk coating" means a coating 

used on a metal disk which stores data magnetically. 

"Metallic coating" means a coating which contains 

more than 5 grams of metal particles per liter of coating, 

applied. 

"Military specification coating" means a coating 

applied to metal parts and products and which has a 

formulation approved by a United States military agency for 

use on military equipment. 

"Mold-seal coating" means the initial coating applied 

to a new mold or repaired mold to provide a smooth surface 

which, when coated with a mold release coating, prevents 

products from sticking to the mold. 

"Multi-component coating" means a coating 

requiring the addition of a separate reactive resin, commonly 

known as a catalyst or hardener, before application to form an 

acceptable dry film. 

"One-component coating" means a coating that is 

ready for application as it comes out of its container to form an 

acceptable dry film. A thinner, necessary to reduce the 

viscosity, is not considered a component. 

"Pan backing coating" means a coating applied to the 

surface of pots, pans, or other cooking implements that are 

exposed directly to a flame or other heating elements. 

"Prefabricated architectural component coatings" 

means coatings applied to metal parts and products that are to 

be used as an architectural structure or their appurtenances 

including, but not limited to, hand railings, cabinets, bathroom 

and kitchen fixtures, fences, rain-gutters and down-spouts, 

window screens, lamp-posts, heating and air conditioning 

equipment, other mechanical equipment, and large fixed 

stationary tools. 

"Pretreatment coating" means a coating which 

contains no more than 12% solids by weight, and at least 0.5% 

acid, by weight, is used to provide surface etching, and is 

applied directly to metal surfaces to provide corrosion 

resistance, adhesion, and ease of stripping. 

"Primer" means a coating applied to a surface to 

provide a firm bond between the substrate and subsequent 

coats. 

"Repair coating" means a coating used to recoat 

portions of a part or product which has sustained mechanical 

damage to the coating. 

"Safety-indicating coating" means a coating which 

changes physical characteristics, such as color, to indicate 

unsafe condition. 

"Silicone release coating" means any coating which 

contains silicone resin and is intended to prevent food from 

sticking to metal surfaces. 

"Solar-absorbent coating" means a coating which has 

as its prime purpose the absorption of solar radiation. 

"Solid-film lubricant" means a very thin coating 

consisting of a binder system containing as its chief pigment 

material one or more of molybdenum disulfide, graphite, 

polytetrafluoroethylene (PTEF) or other solids that act as a dry 

lubricant between faying surfaces. 

"Stencil coating" means an ink or a coating which is 

rolled or brushed onto a template or stamp in order to add 

identifying letters or numbers to metal parts and products. 

"Textured finish" means a rough surface produced by 

spraying and splattering large drops of coating onto a 

previously applied coating. The coatings used to form the 

appearance of the textured finish are referred to as textured 

coatings. 

"Touch-up coating" means a coating used to cover 

minor coating imperfections appearing after the main coating 

operation. 

"Vacuum-metalizing coating" means the undercoat 

applied to the substrate on which the metal is deposited or the 

overcoat applied directly to the metal film. 
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R307-350-5. Emission Standards. 

(I) Each owner or operator shall not apply coatings 

with a VOC content in excess of the amounts specified in Table 

I or shall use an add-on control device as specified in R307-

350-8. 

TABLE I 

METAL PARTS AND PRODUCTS voe CONTENT LIMITS 

(values in pounds of voe per gallon of coating, minus water and 

exempt solvents (compounds not classified as VOC)), as applied) 

COATING CATEGORY voe CONTENT LIMIT 

Air Dried Baked 

General One Component 2.8 2.3 

General Multi Component 2.8 2.3 

Camouflage 3.5 3.5 

El ectri c-Insul ati ng 3.5 3.5 

varnish 

Etching Fill er 3.5 3.5 

Extreme High-Gloss 3.5 3.0 

Extreme Performance 3.5 3.0 

Heat-Resistant 3.5 3.0 

High Performance 6.2 6.2 

architectural 

High Temperature 3.5 3.5 

Metallic 3.5 3.5 

Military Specification 2.8 2.3 

Mold-Seal 3.5 3.5 

Pan Backing 3.5 3.5 

Prefabricated Architectural 3.5 2.3 

Multi -Component 

Prefabricated Architectural 3.5 2.3 

One-Component 

Pretreatment Coatings 3.5 3.5 

Repair and Touch Up 3.5 3.0 

Silicone Release 3.5 3.5 

Solar-Absorbent 3.5 3.0 

Vacuum-Metal izing 3.5 3.5 

Drum Coating, New, Exterior 2.8 2.8 

Drum Coating, New, Interior 3.5 3.5 

Drum Coating, Reconditioned, 3.5 3.5 

Exterior 

Drum Coating, Reconditioned, 4.2 4.2 

Interior 

(2) If more than one content limit indicated in this 

section applies to a specific coating, then the most stringent 

content limit shall apply. 

R307-350-9. Compliance Schedule. 

All sources shall be in compliance with the 

requirements ofR307-350 by January 1, 2014. 

KEY: air pollution, emission controls, coatings, 

miscellaneous metal parts 

Date of Enactment or Last Substantive Amendment: 

December 3, 2013 

Authorizing, and Implemented or Interpreted Law: 19-2-

104(1)(a) 

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