Utah Administrative Code

The Utah Administrative Code is the body of all effective administrative rules as compiled and organized by the Division of Administrative Rules (see Subsection 63G-3-102(5); see also Sections 63G-3-701 and 702).

NOTE: For a list of rules that have been made effective since January 1, 2020, please see the codification segue page.

NOTE TO RULEFILING AGENCIES: Use the RTF version for submitting rule changes.

R307. Environmental Quality, Air Quality.

Rule R307-350. Miscellaneous Metal Parts and Products Coatings.

As in effect on January 1, 2020

Table of Contents

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 miscellaneous metal parts and products coating operations located in Box Elder, Cache, Davis, Salt Lake, Tooele, Utah and Weber counties.

(2) Before September 1, 2018, R307-350 applies to miscellaneous metal parts and products coating operations that have the potential to emit 2.7 tons per year or more of VOC, including related cleaning activities.

(3) Effective September 1, 2018, R307-350 shall apply to miscellaneous metal parts and products coating operations that use a combined 20 gallons or more of coating products and associated solvents per year.

(4) R307-350 applies to, but is not limited to, the following:

(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 subject to R307-354 and light-duty trucks;

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

(c) Surface coating of aerospace vehicles and components subject to R307-355;

(d) The exterior of marine vessels;

(e) Customized top coating of automobiles and trucks if production is less than 35 vehicles per day;

(f) Military munitions manufactured by or for the Armed Forces of the United States;

(g) 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;

(h) Stripping of cured coatings and adhesives;

(i) Canned aerosol coating products;

(j) Research and development, quality control, or performance testing activities; or

(k) The provisions of R307-350 shall not apply to coating products on medical devices up to 800 pounds of VOC per year.

(2) The requirements of R307-350-5 do not apply to the following:

(a) Stencil and hand lettering coatings;

(b) Safety-indicating coatings;

(c) Solid-film lubricants;

(d) Electric-insulating and thermal-conducting coatings;

(e) Magnetic data storage disk coatings; or

(f) Plastic extruded onto metal parts to form a coating.

(3) The requirements of R307-350-6 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 components" is defined in R307-355.

"Air dried coating" means coatings that are dried by the use of air or forced warm air at temperatures up to 194 degrees Fahrenheit.

"As applied" means the VOC and solids content of the finishing material that is actually used for coating the substrate. It includes the contribution of materials used for in-house dilution of the finishing material.

"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.

"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 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 non-convertible-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 is characterized as having an electrical insulation of at least 1000 volts DC per mil on a flat test plate and an average thermal conductivity of at least 0.27 BTU per hour-foot-degree-Fahrenheit.

"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 of 75 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.

"Hand lettering" means an application method utilizing small paint markers, paint brush, or other similar appliance that is administered by hand application equipment to add identification letters, numbers, or markings on a substrate.

"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 withstand 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 10 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.

"Medical device" means an instrument, apparatus, implement, machine, contrivance, implant, in vitro reagent or other similar article including any component or accessory, that is intended for use in the diagnosis of disease or other conditions or in the cure, mitigation, treatment, or prevention of disease, or is intended to affect the structure or any function of the body. For the purpose of this rule, a medical device shall also include associated manufacturing or assembly apparatus.

"Metallic coating" means a coating which contains more than 5 grams of metal particles per liter of coating, as 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 of the coating, 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, numbers, or markings 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.

"Repair and 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 a metal film.

R307-350-5. VOC Content Limits.

(1) No owner or operator shall apply coatings with a VOC content greater than the amounts specified in Table 1, unless the owner or operator uses an add-on control device as specified in R307-350-8.

                                                    TABLE 1

                                       METAL PARTS AND PRODUCTS VOC CONTENT LIMITS
                             (values in pounds of VOC per gallon of coating, minus water and
                             exempt solvents (compounds not classified as VOC as defined in
                                                R307-101-2), as applied)

Coating Category          VOC Content Limits (lb/gal)
                              Air Dried       Baked

General One Component            2.8            2.3
General Multi Component          2.8            2.3
Camouflage                       3.5            3.5
Electric-Insulating              3.5            3.5
Etching Filler                   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
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
Prefabricated Architectural      3.5            2.3
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-Metalizing                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
Drum Coating, Reconditioned,     4.2            4.2

(2) If more than one content limit indicated in this section applies to a specific coating, then the most stringent content limit shall apply.

R307-350-6. Application Methods.

No owner or operator shall apply VOC containing coatings to metal parts and products unless the coating is applied with equipment operated according to the equipment manufacturer specifications, and by the use of one of the following methods:

(1) Electrostatic application;

(2) Flow coat;

(3) Dip/electrodeposition coat;

(4) Roll coat;

(5) Hand Application Methods;

(6) High-volume, low-pressure (HVLP) spray; or

(7) Another application method capable of achieving 65% or greater transfer efficiency equivalent or better to HVLP spray, as certified by the manufacturer.

R307-350-7. Work Practices.

(1) Control techniques and work practices shall be implemented at all times to reduce VOC emissions. Control techniques and work practices shall include:

(a) Storing all VOC-containing coatings, thinners, and coating-related waste materials in closed containers, containers with activated carbon or other control method approved by the EPA Administrator;

(b) Ensuring that mixing and storage containers used for VOC-containing coatings, thinners, and coating-related waste material are kept closed at all times except when depositing or removing these materials, unless a container has activated carbon or other control method approved by the EPA Administrator;

(c) Minimizing spills of VOC-containing coatings, thinners, and coating-related waste materials; and

(d) Conveying VOC-containing coatings, thinners, and coating-related waste materials from one location to another in closed containers, containers with activated carbon or other control method approved by the EPA Administrator, or pipes; and

(e) Minimizing VOC emission from cleaning of application, storage, mixing, and conveying equipment by ensuring that equipment cleaning is performed without atomizing the cleaning solvent and all spent solvent is captured in closed containers.

(2) Solvent cleaning operations shall be performed using cleaning materials having a VOC composite vapor pressure no greater than 1 mm Hg at 20 degrees Celsius, unless an add-on control device is used as specified in R307-350-8.

R307-350-8. Add-On Controls Systems Operations.

(1) If an add-on control system is used, the owner or operator shall install and maintain the add-on emission control system in accordance with the manufacturer recommendations and maintain 90% or greater capture and control efficiency. The overall capture and control efficiency shall be determined using EPA approved methods, as follows.

(a) The capture efficiency of a VOC emission control system's VOC collection device shall be determined according to EPA's "Guidelines for Determining Capture Efficiency," January 9, 1995 and 40 CFR Part 51, Appendix M, Methods 204-204F, as applicable.

(b) The control efficiency of a VOC emission control system's VOC control device shall be determined using test methods in Appendices A-1, A-6, and A-7 to 40 CFR Part 60, for measuring flow rates, total gaseous organic concentrations, or emissions of exempt compounds, as applicable.

(c) An alternative test method may be substituted for the preceding test methods after review and approval by the EPA Administrator.

R307-350-9. Recordkeeping.

(1) The owner or operator shall maintain records of the following:

(a) Records that demonstrate compliance with R307-350. Records shall include, but are not limited to, inventory and product data sheets of all coatings and solvents subject to R307-350.

(b) If an add-on control device is used, records of key system parameters necessary to ensure compliance with R307-350-8.

(i) Key system parameters shall include, but are not limited to, temperature, pressure, flow rates, and an inspection schedule.

(ii) Key inspection parameters shall be in accordance with the manufacturer's recommendations, and as required to demonstrate operations are providing continuous emission reduction from the source during all periods that the operations cause emissions from the source.

(2) All records shall be maintained for a minimum of 2 years.

(3) Records shall be made available to the director upon request.


air pollution, emission controls, coatings, miscellaneous metal parts

Date of Enactment or Last Substantive Amendment

December 6, 2017

Notice of Continuation

March 8, 2018

Authorizing, Implemented, or Interpreted Law


Additional Information


For questions regarding the content or application of rules under Title R307, please contact the promulgating agency (Environmental Quality, Air Quality). A list of agencies with links to their homepages is available at http://www.utah.gov/government/agencylist.html or from http://www.rules.utah.gov/contact/agencycontacts.htm.