(Adopted 6/11/1979, revised 7/10/1990, 7/24/1990, 11/13/1990, 4/21/1995, and 1/20/2000)

A. Applicability
This rule is applicable to any person who manufactures, applies or specifies the use of surface coatings for metal parts and products.

B. Exemptions

  1. The provisions of Section D shall not apply to any coatings with separate formulations used in volumes of less than 20 gallons in any calendar year, provided that the total volume of non-complying coatings used at a stationary source does not exceed 55 gallons annually. Coatings used for operations that are exempt per Sections B.2, B.3 and B.4 shall not be included in calculating the volume of coatings used under this exemption. Any person claiming this exemption shall maintain on a daily basis records consistent with Section H.6. In addition, such person shall be subject to the records required by Section H.

  2. The provisions of Section D shall not apply to touch-up and repair.

  3. This Rule shall not apply to residential non-commercial metal parts and products coating operations.

  4. The provisions of this Rule shall not apply to the coating of parts or products where the only metal involved is fasteners, nails, pins, rivets, hinges, hasps and similar devices used to hold the non-metal parts together and which do not constitute a substantive part of the total surface area.

  5. The provisions of this Rule shall not apply to coatings supplied in non-refillable aerosol containers having capacities of 18 ounces or less.

  6. The provisions of this Rule shall not apply to the coating operations listed below which are covered under the categories cited.

    1. Aircraft or aerospace vehicles (Rule 337) or,
    2. Automobile or truck refinishing (Rule 339) or,
    3. Marine vessel finishing or refinishing (Rule 317) or,
    4. Stationary structures (Rule 323).
  7. Any coating subject to the requirements of this Rule shall be exempt from the requirements of any other coating or solvent rule except Rules 317 and 322.

C. Definitions
See Rule 102 for definitions not limited to this rule. For the purposes of this Rule, the following definitions shall apply:

  1. "Aircraft or Aerospace Vehicle" means a fabricated part, assembly of parts or completed unit of any aircraft, helicopter, missile or space vehicle.

  2. "Air dried" means a process whereby the coated object is cured or dried at a temperature less than 90°C (194°F).

  3. "Baked means a process whereby the coated object is heated to a temperature of 90°C (194°F) or greater for the purpose of curing or drying.

  4. "Detailing or Touch-up Guns" are small air spray equipment, including air brushes, that operate at no greater than 5 cfm air flow and no greater than 50 pounds per square inch gauge (psig) air pressure and are used to coat small products or portions of products.

  5. "Electrostatic Application" means using a sufficient charging of atomized paint droplets to cause deposition by electrostatic attraction. This application requires a minimum 60kV power supply.

  6. "Exempt Organic Compounds" means those compounds listed as exceptions in the definition of "Reactive Organic Compounds" in Rule 102.

  7. "Grams of Reactive Organic Compounds per Liter of Coating Less Water and Less Exempt Compounds" means the weight of reactive organic compounds per combined volume of reactive organic compounds and coating solids and can be calculated by the following equation:

    Ws = Weight of volatile compounds in grams.
    Ww = Weight of water in grams.
    Wes = Weight of exempt organic compounds in grams.
    Vm = Volume of material in liters.
    Vw = Volume of water in liters.
    Ves = Volume of exempt organic compounds in liters

  8. "Hand Application Method" means the application of a surface coating by manually held non-mechanically operated equipment. Such equipment includes paint brush, hand-roller, trowel, spatula, dauber, rag or sponge.

  9. "High Volume Low Pressure Spraying" means using spray equipment with air pressure between 0.1 and 10.0 psi and air volume greater than 15.5 cfm per spray gun.

  10. "Industrial maintenance coating" means high performance coatings which are formulated for the purpose of heavy abrasion, water immersion, chemical, corrosion, temperature, electrical or solvent resistance.

  11. "Metal Part or Product" means any part, assembly of parts or completed unit fabricated in part or in total from metal.

  12. "Repair" means recoating portions of previously coated product due to damage to the coating following normal painting operations.

  13. "Touch-up" means that portion of the coating operation which is separate from the main coating process but necessary to cover minor imperfections or to achieve coverage as required.

  14. "Transfer efficiency" means the ratio of the weight of coating solids adhering to the object being coated to the weight of coating solids used in the application process, expressed as a percentage.

D. Requirements - Reactive Organic Compounds Limits
A person shall not apply any coating or specify the use of any coating on any metal part or product subject to the provisions of this Rule which, as applied, emits or may emit reactive organic compounds into the atmosphere in excess of the following limits expressed in grams per liter of coating less water and exempt organic compounds.

  1. 1. Non-Powder Coatings except Air Dried Industrial Maintenance Coatings:

    Air Dried




  2. Non-Powder Industrial Maintenance Coatings - 420 (when air dried)

  3. Powder Coatings - 50

  4. Sources may elect to use add-on exhaust control equipment to achieve compliance with provisions of Section D, provided that the control equipment meets the requirements of Sections a and b below. Such control equipment must be approved in advance by the Control Officer. Any person choosing to install such control equipment shall obtain an Authority to Construct from the District prior to installation.

    1. The control device shall reduce emissions from an emission collection system by at least 95 percent by weight.
    2. The emission collection system which collects and transports emissions to an air pollution control device shall collect at least 90 percent by weight of the emissions generated by the sources of emissions.

E. Requirements - Application Equipment
A person shall not apply coatings subject to the provisions of this rule except by using properly operated equipment and by:

  1. Electrostatic application, or

  2. Flow coat application, or

  3. Dip coat application, or

  4. High volume, low pressure spraying, or

  5. Electrodeposition, or

  6. Hand application methods, or

  7. Detailing or touch-up guns, or

  8. Any other coating application method that achieves at least 65 percent transfer efficiency as demonstrated by the test method specified in Section I.4.

F. Requirements - Closed Containers
All reactive organic compounds-containing materials, used or unused, including but not limited to surface coatings, thinners, cleanup solvents, or surface preparation materials shall be stored in closed containers and opened only during extraction or introduction of material for mixing, use or storage.

G. Requirements - Labeling

  1. Each container of any coating subject to this rule shall display the date on which the contents were manufactured or a code indicating the date of manufacture. Each manufacturer of such coatings shall file with the Control Officer and the Executive Officer of the California Air Resources Board, an explanation of each code.

  2. Each container of any coating subject to this rule shall display a statement of the manufacturer's recommendation regarding thinning of the coating. This recommendation shall not apply to the thinning of coatings with water. The recommendation shall specify that the coating is to be employed without thinning or diluting under normal environmental and application conditions unless any thinning recommended on the label for normal environmental and application conditions does not cause a coating to exceed its applicable standard.

  3. Each container of any coating subject to this rule shall display the maximum reactive organic compound content of the coating, as applied, and after any thinning as recommended by the manufacturer. Reactive organic compound content shall be displayed as grams of reactive organic compounds per liter of coating less water and exempt solvents. The volatile organic compound content may be displayed instead of the reactive organic compound content as long as the manufacturer's definition of volatile organic compound is consistent with the definition of reactive organic compound contained in District Rule 102. Reactive organic compound content displayed may be calculated using product formulation data, or may be determined using the test method in Section H.

H. Requirements - Recordkeeping
Persons subject to this Rule shall comply with the following requirements.

  1. Maintain a current listing of all reactive organic compound containing materials subject to this Rule:
    1. material name and manufacturer identification;
    2. application method;
    3. material type (i.e. air dried or baked enamel, powdercoating, industrial maintenance coating, cleanup solvent, etc.);
    4. specific mixing ratio;
    5. maximum as-applied reactive organic compound content of each material, less water and less exempt compounds (including thinning solvents);

  2. For each industrial maintenance coating, a list of each part or product coated on a monthly basis.

  3. Current coating manufacturer specification sheets, Material Safety Data Sheets or current air quality data sheets, which list the reactive organic compounds content of each material in use at their facility, shall be available for review on site.

  4. Maintain purchase records identifying the type or name and the volume of material purchased for each reactive organic compounds-containing material.

  5. Maintain on a monthly basis a record of the volume, reactive organic compounds content and resulting reactive organic compound emissions of each reactive organic compounds-containing material used. For permitted facilities and users of non-compliant coatings, all records required by Section H.1 shall be summarized for each calendar year and submitted to the District by March 1 of the following year.

  6. Operators of facilities that use non-compliant coating materials that do not achieve compliance through the operation of emission control equipment shall maintain daily records of the volumes of non-compliant coating materials used. In addition, operators claiming the Section B.1 exemption shall maintain:
    1. Daily records of the volumes of non-compliant coating materials used by each separate formulation.
    2. Annual running totals, from January 1 of each year, of the volume of non-compliant coating materials used for:
      1. Each separate formulation.
      2. All formulations.

  7. Operators of facilities that use non-compliant coating materials with compliance achieved through the operation of emission control equipment shall maintain daily records of key operating and maintenance procedures which demonstrate continuous operation and compliance of the emission control device during periods of emission producing activities.

  8. All records required by this rule shall be retained and available for inspection by the Control Officer or designated representative upon request for the previous 36-month period.

I. Requirements - Test Methods

  1. Coating solvent content shall be determined using Environmental Protection Agency Reference Method 24 or its constituent methods.

  2. Compliance with Section D.4.a shall be determined by using Air Resources Board Method 100 or Environmental Protection Agency Methods 18, 25 or 25A.

  3. Compliance with Section D.4.b shall be determined according to Environmental Protection Agency Method 204 and 204A-F.

  4. Compliance with Section E.8 shall be determined using South Coast Air Quality Management District Method "Spray Equipment Transfer Efficiency Test Procedure of Equipment User", May 24, 1989.