PURPOSE: This rule restricts the emissions of volatile organic compounds from industrial surface coating operations.

1. (1) Applicability.

   1. (A) This rule shall apply throughout St. Louis City and Jefferson, St. Charles, Franklin, and St. Louis Counties.
   2. (B) This rule shall apply to any installation with actual emissions of volatile organic compounds (VOCs) from surface coating operations, including related cleaning activities, of at least three (3) tons per twelve (12)-month rolling period, before consideration of controls.
   3. (C) This rule is only applicable to the surface coating of manufactured items intended for distribution in commerce to persons other than the person or legal entity performing the surface coating.

   4. (D) Exemptions. This rule is not applicable to the following:

      1. 1. Motor vehicle refinishing;
      2. 2. Customizing top coating of motor

vehicles, if production is less than thirty-five (35) vehicles per day;

1. 3. Surface coating that is part of janito-

rial, building, and installation maintenance operations;

1. 4. Research and development, perfor-

mance testing, and quality control of coatings and surface coated products;

1. 5. Aerosol coatings;
2. 6. Field application of architectural

coatings to buildings, building components, and stationary structures;

1. 7. Powder coatings;
2. 8. Surface coating and cleaning of

aerospace vehicles or components at an aerospace manufacture or rework installation that—

1. A. Is subject to the requirements

and/or aerospace-specific exemptions of 10 CSR 10-5.295; or

1. B. Is not subject to 10 CSR 10-5.295

because the installation’s potential to emit volatile organic compounds from aerospace surface coating and cleaning is twenty-five (25) tons per year or less;

1. 9. Surface coating and cleaning of wood

furniture or wood furniture components at a wood furniture manufacturing installation that—

1. A. Is subject to the requirements

and/or wood furniture-specific exemptions of 10 CSR 10-5.530; or

1. B. Is not subject to 10 CSR 10-5.530

because the installation’s potential to emit volatile organic compounds from wood furniture coating and cleaning is less than twentyfive (25) tons per year;

1. 10. Surface coating and cleaning opera-

tions that are subject to a Reasonably Available Control Technology determination under 10 CSR 10-5.520;

1. 11. Application and storage of traffic

coatings that are subject to the requirements of 10 CSR 10-5.450;

1. 12. Printing operations that are subject

to the requirements of 10 CSR 10-5.340 or 10 CSR 10-5.442;

1. 13. Surface coating and cleaning of arti-

cles used for internal company operations, including, but not limited to, work stands; scaffolding; jigs; tooling; dollies; tow bars; aircraft ground support equipment; portable equipment used for maintenance, testing, fabrication, or repair; toolboxes; storage bins; shelving; and other manufacturing or warehouse support items;

1. 14. Surface coating operations which do

not have a VOC limit in section (3) of this rule;

1. 15. Adhesives and sealants that contain

less than 0.17 pounds of VOC per gallon of coating (less water and exempt compounds) as applied;

1. 16. Cyanoacrylate adhesives;
2. 17. Adhesives, sealants, adhesive

primers, and sealant primers that are supplied by the manufacturer or supplier in containers with a net volume of sixteen (16) fluid ounces or less, or a net weight of one (1) pound or less, except plastic cement welding adhesives and contact adhesives;

1. 18. Contact adhesives that are supplied

by the manufacturer or supplier in containers with a net volume of one (1) gallon or less; and

1. 19. Adhesives, sealants, adhesive

primers, sealant primers, surface preparation, and cleanup solvents that are used in the following operations:

1. A. Tire repair operations, provided

the adhesive is labeled for tire repair only;

1. B. Assembly, repair, and manufacture

of aerospace or undersea-based weapon systems;

1. C. Solvent welding operations used in

the manufacture of medical devices or in the manufacture of medical equipment; and

1. D. Plaque laminating operations in

which adhesives are used to bond clear, polyester acetate laminate to wood with lamination equipment installed prior to July 1, 1992.

1. (E) Once an installation exceeds the applicability level of this rule, it shall remain subject to this rule until it can demonstrate, to the satisfaction of the director, that the actual total VOC emissions from surface coating operations, including related cleaning activities and before consideration of controls, is below three (3) tons per twelve (12)-month rolling period for sixty (60) consecutive months.

1. (2) Definitions of certain terms specified in this rule may be found in 10 CSR 10-6.020.

2. (3) General Provisions. General provisions for specific coatings may be found in the following subsections of section (3) of this rule:

   (10/31/14)* JOHN R. ASHCROFT Specific to the St. Louis Metropolitan Area

Industrial Adhesive Application (3)(K)

1. (A) Large Appliance Coatings.

   1. 1. The requirements in this subsection

apply to the surface coating of doors, cases, lids, panels, and interior support parts of the following residential and commercial products:

1. A. Washers;
2. B. Dryers;
3. C. Ranges;
4. D. Refrigerators;
5. E. Freezers;
6. F. Water heaters;
7. G. Dishwashers;
8. H. Trash compactors;
9. I. Air conditioners; and
10. J. Other similar products.

11. 2. Emission limits.

    1. A. Prior to March 1, 2012, no owner

or operator of a surface coating unit subject to this subsection may cause, allow, or permit the discharge into the ambient air of any VOCs in excess of the following, as delivered to the coating applicator(s):

1. B. On or after March 1, 2012, no

owner or operator of a surface coating unit subject to this subsection may cause, allow, or permit the discharge into the ambient air of any VOCs in excess of the following, as delivered to the coating applicator(s):

JOHN R. ASHCROFT (10/31/14)*

1. 3. Method and determination of compli-

ance. The emission limits in paragraph (3)(A)2. of this rule shall be achieved through one (1) of the following:

1. A. VOC content of coatings.

Determine the daily volume-weighted average VOC content of all coatings used in a surface coating unit, expressed as pounds of VOC per gallon of coating (minus water and exempt compounds) per subparagraph (5)(C)3.A. of this rule. The surface coating unit is in compliance if this value is less than or equal to the emission limits in paragraph (3)(A)2. of this rule;

1. B. Combination of VOC content of

coatings and add-on controls. Calculate the required control system efficiency per paragraph (5)(C)4. of this rule. The surface coating unit is in compliance if the actual overall control system efficiency is greater than or equal to the required control system efficiency; or

1. C. Control system. If a control system

is used to achieve compliance, the overall control system efficiency must be ninety percent (90%) or greater.

1. 4. Application equipment. On or after

March 1, 2012, one (1) or a combination of the following equipment shall be used for coating application, unless achieving compliance by using an add-on control system per subparagraph (3)(A)3.C. of this rule:

1. A. Electrostatic equipment;
2. B. High-volume low-pressure (HVLP)

spray equipment;

1. C. Flow coating;
2. D. Roller coating;
3. E. Dip coating, including electrode-

position;

1. F. Airless spray;
2. G. Air-assisted airless spray;
3. H. Ink jet technology; and
4. I. Other coating application method

capable of achieving a transfer efficiency 10 CSR 10-5

containers;

1. B. Ensure that mixing and storage

containers used for VOC-containing coatings, thinners, coating related waste, and cleaning materials are kept closed at all times except when depositing or removing these materials;

1. C. Minimize spills of VOC-containing

coatings, thinners, and cleaning materials;

1. D. Clean up spills immediately;
2. E. Convey any coatings, thinners, and

cleaning materials in closed containers or pipes from one (1) location to another; and

1. F. Minimize VOC emissions from the

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.

1. 6. The VOC limits in paragraph (3)(A)2.

of this rule do not apply to the following types of coatings and coating operations:

1. A. Stencil coatings;
2. B. Safety-indicating coatings;
3. C. Solid film lubricants; or
4. D. Electric-insulating and thermal-

conducting coatings.

1. (B) Metal Furniture Coatings.

   1. 1. The requirements in this subsection

apply to surface coating of any furniture made of metal or any metal part that will be assembled with other metal, wood, fabric, plastic, or glass parts to form a furniture piece.

1. 2. Emission limits.

   1. A. Prior to March 1, 2012, no owner

or operator of a surface coating unit subject to this subsection may cause, allow, or permit the discharge into the ambient air of any VOCs in excess of three (3.0) pounds of VOC per gallon of coating (minus water and exempt compounds) as delivered to the coating applicator(s).

1. B. On or after March 1, 2012, no

owner or operator of a surface coating unit subject to this subsection may cause, allow, or permit the discharge into the ambient air of any VOCs in excess of the following, as delivered to the coating applicator(s):

1. 3. Method and determination of compli-

ance. The emission limits in paragraph (3)(B)2. of this rule shall be achieved through one (1) of the following:

1. A. VOC content of coatings.

Determine the daily volume-weighted average VOC content of all coatings used in a surface coating unit, expressed as pounds of VOC per gallon of coating (minus water and exempt compounds) per subparagraph (5)(C)3.A. of this rule. The surface coating unit is in compliance if this value is less than or equal to the emission limits in paragraph (3)(B)2. of this rule;

1. B. Combination of VOC content of

coatings and add-on controls. Calculate the required control system efficiency per paragraph (5)(C)4. of this rule. The surface coating unit is in compliance if the actual overall control system efficiency is greater than or equal to the required control system efficiency; or

1. C. Control system. If a control system

is used to achieve compliance, the overall control system efficiency must be ninety percent (90%) or greater.

1. 4. Application equipment. On or after

March 1, 2012, one (1) or a combination of the following equipment shall be used for coating application, unless achieving compliance by using an add-on control system per subparagraph (3)(B)3.C. of this rule:

1. A. Electrostatic equipment;
2. B. HVLP spray equipment;
3. C. Flow coating;
4. D. Roller coating;
5. E. Dip coating, including electrode-

position;

1. F. Airless spray;
2. G. Air-assisted airless spray;
3. H. Ink jet technology; and
4. I. Other coating application method

capable of achieving a transfer efficiency equivalent or better than achieved by HVLP spraying.

1. 5. Work practices. On or after March 1,

2012, work practices shall be used to mini-

1. C. Minimize spills of VOC-containing

coatings, thinners, and cleaning materials;

1. D. Clean up spills immediately;
2. E. Convey any coatings, thinners, and

cleaning materials in closed containers or pipes from one (1) location to another; and owner or operator of an automobile or light-

1. F. Minimize VOC emissions from the duty truck assembly installation may cause,

cleaning of application, storage, mixing, and allow, or permit the discharge into the ambiconveying equipment by ensuring that equipent air of any VOC in excess of the following: ment cleaning is performed without atomizing the cleaning solvent and all spent solvent is captured in closed containers.

1. 6. The VOC limits in paragraph (3)(B)2.

of this rule do not apply to the following types of coatings and coating operations:

1. A. Stencil coatings;
2. B. Safety-indicating coatings;
3. C. Solid film lubricants; and
4. D. Electric-insulating and thermal-

conducting coatings.

1. (C) Automobile and Light-Duty Truck Assembly Coatings.

   1. 1. The requirements in this subsection

apply to automobile and light-duty truck surface coating operations performed in an automobile or light-duty truck assembly installation.

1. 2. Emission limits.

   1. A. Prior to March 1, 2012, no owner

or operator of an automobile or light-duty truck assembly installation may cause, allow, or permit the discharge into the ambient air of any VOC in excess of the following: Automobile and Light-Duty Truck Assembly Coatings Coating Category Emission Limit 15.1 pounds of VOC per gallon of

3.0 pounds of VOC per gallon of

All Other Coatings coating (minus water and exempt compounds)

1. B. On or after March 1, 2012, no

   Automobile and Light-Duty Truck Assembly Coatings

Coating Category Emission Limit RT(cid:3)(cid:31)(cid:3)(cid:19)(cid:17)(cid:19)(cid:23)(cid:19) (cid:19)(cid:17)(cid:19)(cid:23)(cid:19)(cid:3)(cid:100)(cid:3)RT(cid:3)(cid:31)(cid:3)(cid:19)(cid:17)(cid:20)(cid:25)(cid:19) RT(cid:3)(cid:116)(cid:3)(cid:19)(cid:17)(cid:20)(cid:25)(cid:19) 0.7 pounds of (cid:19)(cid:17)(cid:26)(cid:3)(cid:238)(cid:3)(cid:22)(cid:24)(cid:19)(cid:3)(cid:19)(cid:17)(cid:20)(cid:25)(cid:19)(cid:16)RT(cid:3) Electrodeposition No VOC VOC per pounds of VOC per primer (EDP) Emission gallon of gallon of coating solids Limit coating solids deposited deposited Primer-surfacer 12.0 pounds of VOC per gallon of coating solids deposited Topcoat 12.0 pounds of VOC per gallon of coating solids deposited Combined Primer- 12.0 pounds of VOC per gallon of coating solids deposited Surfacer and Topcoat 4.8 pounds of VOC per gallon of coating (minus water and Final repair exempt compounds)

(10/31/14)* JOHN R. ASHCROFT

Specific to the St. Louis Metropolitan Area

Automobile and light-duty truck

Automobile and light-duty truck 5.8 lubricating wax/compound

1. 3. Method and determination of compli-

ance. The emission limits in paragraph (3)(C)2. of this rule shall be achieved through the following:

1. A. Spray primer; primer-surfacer;

topcoat; and combined primer-surfacer and topcoat. The VOC emission rate, expressed as pounds of VOC per gallon of coating solids deposited, is determined by the procedures in the U.S. Environmental Protection Agency (EPA) document Protocol for Determining the Daily Volatile Organic Compound Emission Rate of Automobile and Light-Duty Truck Primer-Surfacer and Topcoat Operations (EPA-453/R-08-002), dated September 2008. The surface coating unit is in compliance if the emission rate is less than or equal to the emission limit in paragraph (3)(C)2. of this rule;

1. B. Electrodeposition primer (EDP).

Determine the monthly volume-weighted average VOC emission rate of the EDP coating unit, expressed as pounds of VOC per gallon of coating solids deposited, per subparagraph (5)(C)3.D. of this rule. The EDP coating unit is in compliance if this value is less than or equal to the emission limit in paragraph (3)(C)2. of this rule;

1. C. Final repair coatings. Determine

the daily volume-weighted average VOC content of all coatings used in a surface coating unit, expressed as pounds of VOC per gallon

JOHN R. ASHCROFT (10/31/14)*

ance if this value is less than or equal to the

1. (II) Ensure that mixing and storage

containers used for VOC-containing coatings, thinners, coating related waste, and cleaning materials are kept closed at all times except when depositing or removing these materials;

1. (III) Minimize spills of VOC-con-

taining coatings, thinners, and cleaning materials;

1. (IV) Clean up spills immediately;
2. (V) Convey any coatings, thinners,

and cleaning materials in closed containers or pipes from one (1) location to another; and

1. (VI) Minimize VOC emissions

from the 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.

1. B. Work practice plan. Installations

subject to subparagraph (3)(C)4.A. of this rule shall develop and implement a work practice plan to minimize VOC emissions from cleaning and purging of equipment associated with all coating operations for which emission limits are specified in paragraph (3)(C)2. of this rule. The plan shall specify practices and procedures to ensure that VOC emissions from the following operations are minimized:

1. (I) Vehicle body wiping;
2. (II) Coating line purging;
3. (III) Flushing of coating systems;
4. (IV) Cleaning of spray booth

grates;

1. (V) Cleaning of spray booth walls;
2. (VI) Cleaning of spray booth equip- 10 CSR 10-5

prior to controls;

pounds of VOC per gallon of coating (minus water and exempt compounds) as delivered to the coating applicator(s).

1. B. On or after March 1, 2012, no

owner or operator of a surface coating unit subject to this subsection may cause, allow, or permit the discharge into the ambient air of any VOCs in excess of the following, as delivered to the coating applicator(s):

1. 3. Method and determination of compli-

ance. The emission limits in paragraph (3)(D)2. of this rule shall be achieved through one (1) of the following:

1. A. VOC content of coatings.

   1. (I) Prior to March 1, 2012.

Determine the daily volume-weighted average VOC content of all coatings used in a surface coating unit, expressed as pounds of VOC per gallon of coating (minus water and exempt compounds) per subparagraph (5)(C)3.A. of this rule. The surface coating unit is in compliance if this value is less than or equal to the emission limit in paragraph (3)(D)2. of this rule.

1. (II) On or after March 1, 2012.

Determine the daily mass-weighted average VOC content of all coatings used in a surface coating unit, expressed as pounds of VOC per pound of coating solids per subparagraph (5)(C)3.C. of this rule. The surface coating unit is in compliance if this value is less than or equal to the emission limits in paragraph (3)(D)2. of this rule; or

1. B. Control system. If a control sys-

tem is used to achieve compliance, the overall control system efficiency must be ninety percent (90%) or greater.

1. 4. Work practices. On or after March 1,

2012, work practices shall be used to minimize VOC emissions from solvent storage, mixing operations, and handling operations for coatings, thinners, cleaning materials, and waste materials. Work practices shall include, but not be limited to, the following:

1. A. Store all VOC-containing coatings,

thinners, and cleaning materials in closed containers;

1. B. Ensure that mixing and storage

containers used for VOC-containing coatings, thinners, coating related waste, and cleaning materials are kept closed at all times except when depositing or removing these materials;

1. C. Minimize spills of VOC-containing

coatings, thinners, and cleaning materials;

1. D. Clean up spills immediately;
2. E. Convey any coatings, thinners, and

cleaning materials in closed containers or pipes from one (1) location to another; and

1. F. Minimize VOC emissions from the

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.

1. (E) Magnet Wire Coatings.

   1. 1. The requirements in this subsection

apply to the coating of electrically insulating varnish or enamel to aluminum or copper wire for use in electrical machinery.

1. 2. Emission limits. No owner or opera-

tor of a surface coating unit subject to this subsection may cause, allow, or permit the discharge into the ambient air of any VOCs in excess of one and seven-tenths (1.7) pounds of VOC per gallon of coating (minus water and exempt compounds) as delivered to the coating applicator(s).

1. 3. Method and determination of compli-

ance. The emission limits in paragraph (3)(E)2. of this rule shall be achieved through one (1) of the following:

1. A. VOC content of coatings.

Determine the daily volume-weighted average VOC content of all coatings used in a surface coating unit, expressed as pounds of VOC per gallon of coating (minus water and exempt compounds), per subparagraph (5)(C)3.A. of this rule. The surface coating unit is in compliance if this value is less than or equal to the emission limit in paragraph (3)(E)2. of this rule;

1. B. Combination of VOC content of

coatings and add-on controls. Calculate the required control system efficiency per paragraph (5)(C)4. of this rule. The surface coating unit is in compliance if the actual overall control system efficiency is greater than or equal to the required control system efficiency; or

1. C. Control system. If a control system

is used to achieve compliance, the overall control system efficiency must be ninety percent (90%) or greater.

1. (F) Coil Coatings.

   1. 1. The requirements in this subsection

apply to the surface coating of any flat metal sheet or strip that comes in rolls or coils.

1. 2. Emission limits. No owner or opera-

tor of a surface coating unit subject to this subsection may cause, allow, or permit the discharge into the ambient air of any VOCs in excess of two and six-tenths (2.6) pounds of VOC per gallon of coating (minus water and exempt compounds) as delivered to the coating applicator(s).

1. 3. Method and determination of compli-

ance. The emission limits in paragraph (3)(F)2. of this rule shall be achieved through one (1) of the following:

1. A. VOC content of coatings.

Determine the daily volume-weighted average VOC content of all coatings used in a surface coating unit, expressed as pounds of VOC per gallon of coating (minus water and exempt compounds), per subparagraph (5)(C)3.A. of this rule. The surface coating unit is in compliance if this value is less than or equal to the emission limit in paragraph (3)(F)2. of this rule;

1. B. Combination of VOC content of

coatings and add-on controls. Calculate the required control system efficiency per paragraph (5)(C)4. of this rule. The surface coating unit is in compliance if the actual overall control system efficiency is greater than or equal to the required control system efficiency; or

1. C. Control system. If a control system

is used to achieve compliance, the overall control system efficiency must be ninety percent (90%) or greater.

1. (G) Can Coatings.

   1. 1. The requirements in this subsection

apply to the surface coating of cans.

1. 2. Emission limits. No owner or opera-

tor of a surface coating unit subject to this subsection may cause, allow, or permit the discharge into the ambient air of any volatile organic compounds, as delivered to the coating applicator(s), in excess of the following:

1. 3. Method and determination of compli-

ance. The emission limits in paragraph (3)(G)2. of this rule shall be achieved through one (1) of the following:

1. A. VOC content of coatings.

Determine the daily volume-weighted average VOC content of all coatings used in a surface coating unit, expressed as pounds of VOC per gallon of coating (minus water and exempt compounds), per subparagraph (5)(C)3.A. of this rule. The surface coating unit is in compliance if this value is less than or equal to the emission limit in paragraph (3)(G)2. of this rule;

1. B. Combination of VOC content of

coatings and add-on controls. Calculate the required control system efficiency per paragraph (5)(C)4. of this rule. The surface coating unit is in compliance if the actual overall control system efficiency is greater than or equal to the required control system efficiency; or

1. C. Control system. If a control system

is used to achieve compliance, the overall control system efficiency must be ninety percent (90%) or greater.

1. (H) Vinyl and Fabric Coatings.

   1. 1. The requirements in this subsection

apply to vinyl coating and fabric coating.

1. 2. Emission limits. No owner or opera-

tor of a surface coating unit subject to this subsection may cause, allow, or permit the discharge into the ambient air of any volatile organic compounds, as delivered to the coating applicator(s), in excess of the following:

1. 3. Method and determination of compli-

ance. The emission limits in paragraph

(10/31/14)* JOHN R. ASHCROFT Specific to the St. Louis Metropolitan Area

(3)(H)2. of this rule shall be achieved through one (1) of the following:

1. A. VOC content of coatings.

Determine the daily volume-weighted average VOC content of all coatings used in a surface coating unit, expressed as pounds of VOC per gallon of coating (minus water and exempt compounds), per subparagraph (5)(C)3.A. of this rule. The surface coating unit is in compliance if this value is less than or equal to the emission limit in paragraph (3)(H)2. of this rule;

1. B. Combination of VOC content of

coatings and add-on controls. Calculate the required control system efficiency per paragraph (5)(C)4. of this rule. The surface coating unit is in compliance if the actual overall control system efficiency is greater than or equal to the required control system efficiency; or

1. C. Control system. If a control system

is used to achieve compliance, the overall control system efficiency must be ninety percent (90%) or greater.

1. (I) Flat Wood Paneling Coatings.

   1. 1. The requirements in this subsection

2012, no owner or operator of a surface coating unit subject to this subsection may cause, allow, or permit the discharge into the ambient air of any VOCs in excess of two and onetenths (2.1) pounds of VOC per gallon of coating (minus water and exempt compounds) as delivered to the coating applicator(s).

1. 3. Method and determination of compli-

ance. The emission limits in paragraph (3)(I)2. of this rule shall be achieved through one (1) of the following:

1. A. VOC content of coatings.

Determine the daily volume-weighted average VOC content of all coatings used in a surface coating unit, expressed as pounds of VOC per gallon of coating (minus water and exempt compounds), per subparagraph (5)(C)3.A. of this rule. The surface coating unit is in compliance if this value is less than or equal to the emission limit in paragraph (3)(I)2. of this rule;

1. B. Combination of VOC content of

coatings and add-on controls. Calculate the required control system efficiency per paragraph (5)(C)4. of this rule. The surface coating unit is in compliance if the actual overall

JOHN R. ASHCROFT (10/31/14)*

control system efficiency is greater than or equal to the required control system efficiency; or

1. C. Control system. If a control sys-

tem is used to achieve compliance, the overall control system efficiency must be ninety percent (90%) or greater.

1. 4. Work practices. On or after March 1,

2012, work practices shall be used to minimize VOC emissions from solvent storage, mixing operations, and handling operations for coatings, thinners, cleaning materials, and waste materials. Work practices shall include, but not be limited to, the following:

1. A. Store all VOC-containing coatings,

thinners, and cleaning materials in closed containers;

1. B. Ensure that mixing and storage

containers used for VOC-containing coatings, thinners, coating related waste, and cleaning materials are kept closed at all times except when depositing or removing these materials;

1. C. Minimize spills of VOC-containing

coatings, thinners, and cleaning materials;

1. D. Clean up spills immediately;
2. E. Convey any coatings, thinners, and
3. 1. The requirements in this subsection

apply to the surface coating of all other miscellaneous metal and plastic parts including, but not limited to, the following:

1. A. Large and small farm implements

and machinery;

1. B. Railroad cars;
2. C. Small household appliances;
3. D. Office equipment;
4. E. Commercial and industrial

machinery and equipment;

1. F. Any other industrial category that

coats metal parts or products under the Standard Industrial Classification Code of major groups #33, #34, #35, #36, #37, #38, and #39;

1. G. Fabricated metal products;
2. H. Molded plastic parts;
3. I. Automotive or transportation

equipment;

1. J. Interior or exterior automotive

parts;

1. K. Construction equipment;
2. L. Motor vehicle accessories;
3. M. Bicycles and sporting goods;
4. N. Toys; 10 CSR 10-5
5. O. Recreational vehicles;
6. P. Pleasure craft (recreational boats);
7. Q. Extruded aluminum structural

components;

1. R. Heavy-duty vehicles;
2. S. Lawn and garden equipment;
3. T. Business machines;
4. U. Laboratory and medical equip-

ment;

1. V. Electronic equipment;
2. W. Steel drums;
3. X. Metal pipes; and
4. Y. Prefabricated architectural compo-

nents when the coating is applied in a surface coating unit as defined in 10 CSR 10-6.020.

1. 2. Emission limits.

   1. A. Prior to March 1, 2012, no owner

or operator of a surface coating unit subject to this subsection may cause, allow, or permit the discharge into the ambient air of any VOCs in excess of the following, as delivered to the coating applicator(s):

Emission Limit

pounds of VOC per gallon of coating (minus water

Mail Boxes and Shutters 3.5

1. B. On or after March 1, 2012, no

owner or operator of a surface coating unit subject to this subsection may cause, allow, or permit the discharge into the ambient air of any VOCs in excess of the following, as delivered to the coating applicator(s):

1. 3. Method and determination of compli-

ance. The emission limits in paragraph (3)(J)2. of this rule shall be achieved through one (1) of the following:

1. A. VOC content of coatings.

Determine the daily volume-weighted average VOC content of all coatings used in a surface coating unit, expressed as pounds of VOC per gallon of coating (minus water and exempt compounds), per subparagraph (5)(C)3.A. of this rule. The surface coating unit is in compliance if this value is less than or equal to the emission limit in paragraph (3)(J)2. of this rule;

1. B. Combination of VOC content of

coatings and add-on controls. Calculate the required control system efficiency per paragraph (5)(C)4. of this rule. The surface coating unit is in compliance if the actual overall control system efficiency is greater than or equal to the required control system efficiency; or

1. C. Control system. If a control system

is used to achieve compliance, the overall control system efficiency must be ninety percent (90%) or greater.

28 CODE OF STATE REGULATIONS (10/31/14)* JOHN R. ASHCROFT Specific to the St. Louis Metropolitan Area

1. 4. Application equipment. On or after

March 1, 2012, one (1) or a combination of the following equipment shall be used for coating application, unless achieving compliance by using an add-on control device per subparagraph (3)(J)3.C. of this rule:

1. A. Electrostatic equipment;
2. B. HVLP spray equipment;
3. C. Flow coating;
4. D. Roller coating;
5. E. Dip coating, including electrode-

position;

1. F. Airless spray;
2. G. Air-assisted airless spray;
3. H. Ink jet technology; and
4. I. Other coating application method

capable of achieving a transfer efficiency equivalent or better than achieved by HVLP spraying.

1. 5. Work practices. On or after March 1,

2012, work practices shall be used to minimize VOC emissions from solvent storage, mixing operations, and handling operations for coatings, thinners, cleaning materials, and waste materials. Work practices shall include, but not be limited to, the following:

1. A. Store all VOC-containing coatings,

thinners, and cleaning materials in closed containers;

1. B. Ensure that mixing and storage

containers used for VOC-containing coatings, thinners, coating related waste, and cleaning materials are kept closed at all times except when depositing or removing these materials;

1. C. Minimize spills of VOC-containing

coatings, thinners, and cleaning materials;

1. D. Clean up spills immediately;
2. E. Convey any coatings, thinners, and

cleaning materials in closed containers or pipes from one (1) location to another; and

1. F. Minimize VOC emissions from the

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.

1. 6. For metal parts coatings, the VOC

limits in paragraph (3)(J)2. of this rule do not apply to the following types of coatings and coating operations:

1. A. Stencil coatings;
2. B. Safety-indicating coatings;
3. C. Solid film lubricants;
4. D. Electric-insulating and thermal-

conducting coatings;

1. E. Magnetic data storage disk coat-

ings; and

1. F. Plastic extruded onto metal parts to

form a coating.

1. 7. For metal parts coatings, the applica-

tion equipment requirements in paragraph (3)(J)4. of this rule do not apply to the following types of coatings and coating operations:

1. A. Touch-up coatings;
2. B. Repair coatings; and
3. C. Textured coatings.
4. 8. For plastic parts coatings, the VOC

limits in paragraph (3)(J)2. of this rule do not apply to the following types of coatings and coating operations:

1. A. Touch-up and repair coatings;
2. B. Stencil coatings applied on clear or

transparent substrates;

1. C. Clear or translucent coatings;
2. D. Coatings applied at a paint manu-

facturing installation while conducting performance tests on the coatings;

1. E. Any individual coating category

used in volumes less than fifty (50) gallons in any one (1) year, if substitute compliant coatings are not available, provided that the total usage of all such coatings does not exceed two hundred (200) gallons per year, per installation;

1. F. Reflective coating applied to high-

way cones;

1. G. Mask coatings that are less than

one-half (0.5) millimeter thick (dried) and the area coated is less than twenty-five (25) square inches;

1. H. Electromagnetic interference and

radio frequency interference (EMI/RFI) shielding coatings; and

1. I. Heparin-benzalkonium chloride

(HBAC)-containing coatings applied to medical devices, provided that the total usage of all such coatings does not exceed one hundred (100) gallons per year, per installation.

1. 9. For plastic parts coatings, the appli-

cation equipment requirements in paragraph (3)(J)4. of this rule do not apply to airbrush operations using five (5) gallons or less per year of coating.

1. 10. For automobile, transportation, or

business machine plastic parts coatings, the VOC limits in paragraph (3)(J)2. of this rule do not apply to the following types of coatings and coating operations:

1. A. Texture coatings;
2. B. Vacuum metalizing coatings;
3. C. Gloss reducers;
4. D. Texture adhesion primers;
5. E. Electrostatic preparation coatings;
6. F. Resist coatings; and
7. G. Stencil coatings.
8. 11. For pleasure craft surface coating

operations, the application equipment requirements in paragraph (3)(J)4. of this rule do not apply to extreme high gloss coatings.

1. 12. The limits for military specification

coatings in subparagraph (3)(J)2.B. of this rule do not apply to coatings that meet the 10 CSR 10-5

following criteria:

1. A. The coating is applied to military

equipment used for national defense;

1. B. The coating performance is critical

to the successful operation of the military equipment;

1. C. The coating is mandated in a spec-

ification or contract and a substitution of coatings that meet the VOC limits in subparagraph (3)(J)2.B. of this rule is prohibited; and

1. D. The director grants approval for

the use of the coating at the installation.

1. 13. The limits for pleasure craft coatings

in subparagraph (3)(J)2.B. do not apply to pleasure craft touch-up and repair coatings supplied by the manufacturer or supplier in containers with a net volume of one (1) liter or less.

1. (K) Industrial Adhesive Application.

   1. 1. The requirements in this subsection

apply to adhesive application processes.

1. 2. Emission limits.

   1. A. On or after March 1, 2012, no

owner or operator of an adhesive application process subject to this subsection may cause, allow, or permit the discharge into the ambient air of any VOCs in excess of the following, as delivered to the coating applicator(s): sive primers applied to particular substrates shall apply as follows:

1. (I) If an adhesive is subject to a

specific VOC limit in subparagraph (3)(K)2.A., the specific limit is applicable rather than an adhesive-to-substrate limit; and

1. (II) When an adhesive is used to

bond dissimilar substrates, the applicable substrate category with the highest VOC content shall be the limit.

1. 3. Method and determination of compli-

ance. The emission limits in paragraph (3)(K)2. of this rule shall be achieved through one (1) of the following:

1. A. VOC content of coatings.

Determine the daily volume-weighted average VOC content of all coatings used in an adhesive application process, expressed as pounds of VOC per gallon of coating (minus water and exempt compounds) per subparagraph (5)(C)3.A. of this rule. The adhesive application process is in compliance if this value is less than or equal to the emission limits in paragraph (3)(K)2. of this rule;

1. B. Combination of VOC content of

coatings and add-on controls. Calculate the required control system efficiency per paragraph (5)(C)4. of this rule. The adhesive application process is in compliance if the actual overall control system efficiency is greater than or equal to the required control system efficiency; or

1. C. Control system. If a control system

is used to achieve compliance, the overall control system efficiency must be eighty-five percent (85%) or greater.

1. 4. Application equipment. On or after

March 1, 2012, one (1) or a combination of the following equipment shall be used for adhesive application, unless achieving compliance by using an add-on control device per subparagraph (3)(K)3.C. of this rule:

1. A. Electrostatic spray;
2. B. HVLP spray;
3. C. Flow coat;
4. D. Roller coat or hand application,

including non-spray application methods similar to handor mechanically-powered caulking gun, brush, or direct hand application;

1. E. Dip coat, including electrodeposi-

tion;

1. F. Airless spray;
2. G. Air-assisted airless spray;
3. H. Ink jet technology; and
4. I. Other coating application method

capable of achieving a transfer efficiency equivalent or better than achieved by HVLP spraying.

1. 5. Work practices. On or after March 1,

1. B. The VOC limits in subparagraph 2012, work practices shall be used to mini- (3)(K)2.A. of this rule for adhesives or adhemize VOC emissions from solvent storage, mixing operations, and handling operations for coatings, thinners, cleaning materials, and waste materials. Work practices shall include, but not be limited to, the following:

   1. A. Store all VOC-containing coatings,

thinners, and cleaning materials in closed containers;

1. B. Ensure that mixing and storage

containers used for VOC-containing coatings, thinners, coating related waste, and cleaning materials are kept closed at all times except when depositing or removing these materials;

1. C. Minimize spills of VOC-containing

coatings, thinners, and cleaning materials;

1. D. Clean up spills immediately;
2. E. Convey any coatings, thinners, and

cleaning materials in closed containers or pipes from one (1) location to another; and

1. F. Minimize VOC emissions from the

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.

1. (4) Reporting and Record Keeping.

   1. (A) The owner or operator of a surface coating unit covered under this rule shall keep records as necessary to determine compliance. Records kept should be appropriate for the facility, their products, and operations. These may include, as applicable, one (1) or more of the following:

      1. 1. Current list of coatings used and the

VOC content as applied;

1. 2. Daily volume usage of each coating;
2. 3. Records of the weighted average VOC

content for each coating type included in averaging for coating operations that achieve compliance through coating VOC content or a combination of coating VOC content and control system;

1. 4. Annual VOC emissions from surface

coating equipment cleaning; and

1. 5. All test results to determine capture

efficiency, control efficiency, and coating properties.

1. (B) Records such as daily production rates may be substituted for actual daily coating use measurements provided the owner submits a demonstration, approved by the director, that these records are adequate for the purposes of this rule.

2. (C) Any owner or operator using an emission control device to achieve compliance shall maintain daily records of key system operating parameters for emission control equipment including, but not limited to:

   1. 1. Identification of the type of emissions

control system used;

1. 2. Hours of operation; Specific to the St. Louis Metropolitan Area
2. 3. Routine and non-routine mainte-

nance, including dates and duration of any outages;

1. 4. Records of test reports conducted;
2. 5. An owner or operator of a surface

coating unit employing a thermal or catalytic oxidizer to achieve compliance shall comply with the following requirements:

1. A. Continuous temperature monitor-

ing and recording equipment shall be installed and operated to accurately measure the operating temperature(s) for the control device; and

1. B. The following information shall be

collected and recorded each day of operation of the surface coating unit and the control device:

1. (I) A log or record of the operating

time for the control device, monitoring equipment, and the associated surface coating unit;

1. (II) For thermal oxidizers, all three

(3)-hour periods of operation during which the average combustion temperature was more than fifty degrees Fahrenheit (50 ºF) below the average combustion temperature during the most recent emission test that demonstrated that the surface coating unit was in compliance; and

1. (III) For catalytic oxidizers, all

three (3)-hour periods of operation during which the average temperature of the exhaust gases immediately before the catalyst bed was more than fifty degrees Fahrenheit (50 ºF) below the average temperature of the exhaust gases during the most recent emission test that demonstrated that the surface coating unit was in compliance, and all three (3)-hour periods during which the average temperature difference across the catalyst bed was less than eighty percent (80%) of the average temperature difference during the most recent emission test that demonstrated that the surface coating operation was in compliance; and

1. 6. An owner or operator of a surface

coating unit employing a carbon adsorption system to achieve compliance shall comply with the following requirements:

1. A. The following types of monitoring

and recording equipment shall be installed and operated for the carbon adsorption system:

1. (I) A continuous emission monitor-

ing and recording system that is capable of accurately measuring and recording the concentration of organic compounds in the exhaust gases from the carbon adsorption system;

1. (II) Monitoring and recording

equipment that is capable of accurately measuring and recording the total mass steam flow rate for each regeneration cycle of each carbon bed; and

1. (III) Monitoring and recording

equipment that is capable of accurately measuring and recording the temperature of each carbon bed after regeneration (and after completion of any cooling cycle(s)); and

1. B. The following information shall be

collected and recorded each day of operation of the surface coating unit and the carbon adsorption system:

1. (I) A log or record of the operating

time for the carbon adsorption system, monitoring equipment, and the associated surface coating unit;

1. (II) For a carbon adsorption system

that employs a continuous emission monitoring and recording system to measure and record the concentration of organic compounds in the exhaust gases, all three (3)- hour periods of operation during which the average concentration level or reading in the exhaust gases is more than twenty percent (20%) greater than the exhaust gas organic compound concentration level or reading measured by the most recent performance test that demonstrated that the surface coating unit was in compliance;

1. (III) For a carbon adsorption sys-

tem that employs monitoring and recording equipment to measure and record the total mass steam flow rate for each regeneration cycle of each carbon bed, all carbon bed regeneration cycles during which the total mass steam flow rate was more than ten percent (10%) below the total mass steam flow rate during the most recent performance test that demonstrated that the surface coating unit was in compliance; and

1. (IV) For a carbon adsorption sys-

tem that employs monitoring and recording equipment to measure and record the temperature of each carbon bed after regeneration (and after completion of any cooling cycle(s)) was more than ten percent (10%) greater than the carbon bed temperature during the most recent performance test that demonstrated that the surface coating unit was in compliance.

1. (D) Records required under subsections (4)(A) through (4)(C) of this rule shall be retained by the owner or operator for a minimum of five (5) years. These records shall be made available to the director upon request.

1. (5) Test Methods.

   1. (A) Test Methods for Control Systems. Owners or operators demonstrating compliance with the provisions of this rule via a control system shall determine the overall control system efficiency as the product of the 10 CSR 10-5

capture efficiency and control device efficiency, using the following test methods:

1. 1. The VOC concentration of gaseous

air streams shall be determined with a test consisting of three (3) separate runs, each lasting a minimum of sixty (60) minutes using one (1) of the following methods as specified by 40 CFR 60, Appendix A— Reference Methods:

1. A. Method 18—Measurement of

Gaseous Organic Compound Emissions by Gas Chromatography;

1. B. Method 25—Determination of

Total Gaseous Non-methane Organic Emissions as Carbon; or

1. C. Method 25A—Determination of

Total Gaseous Organic Concentration Using Flame Ionization Analyzer;

1. 2. Sample and velocity traverses shall be

determined by using one (1) of the following methods as specified by 40 CFR 60, Appendix A—Reference Methods:

1. A. Method 1—Sample and Velocity

Traverses for Stationary Sources; or

1. B. Method 1A—Sample and Velocity

Traverses for Stationary Sources with Small Stacks or Ducts;

1. 3. Velocity and volumetric flow rates

shall be determined by using one (1) of the following methods as specified by 40 CFR 60, Appendix A—Reference Methods:

1. A. Method 2—Determination of

Stack Gas Velocity and Volumetric Flow Rate (Type S Pitot Tube);

1. B. Method 2A—Direct Measurement

of Gas Volume Through Pipes and Small Ducts;

1. C. Method 2C—Determination of

Stack Gas Velocity and Volumetric Flow Rate in Small Stacks or Ducts (Standard Pitot Tube);

1. D. Method 2D—Measurement of Gas

Volumetric Flow Rates in Small Pipes and Ducts;

1. E. Method 2F—Determination of

Stack Gas Velocity and Volumetric Flow Rate With Three-Dimensional Probes;

1. F. Method 2G—Determination of

Stack Gas Velocity and Volumetric Flow Rate With Two-Dimensional Probes; or

1. G. Method 2H—Determination of

Stack Gas Velocity Taking Into Account Velocity Decay Near the Stack Wall;

1. 4. To analyze the exhaust gases, use the

method in 10 CSR 10-6.030(3);

1. 5. To measure the moisture in the stack

gas, use the method in 10 CSR 10-6.030(4); and

1. 6. To determine capture efficiency, use

the procedure in 10 CSR 10-6.030(20).

1. (B) Test Methods for Determining Coating Properties. The coating properties in paragraphs (5)(B)1. through (5)(B)6. of this rule shall be determined from the coating manufacturer’s supplied data or the method referenced in 10 CSR 10-6.030(14)(C). If there is a discrepancy between the manufacturer’s supplied data and the method referenced in 10 CSR 10-6.030(14)(C), compliance shall be based on the method referenced in 10 CSR 10-6.030(14)(C).

   1. 1. Density of coating, DC.

      1. A. Electrodeposition primer. For

electrodeposition primer, the coating density shall be as received.

1. B. All other coatings. For all other

coatings, the coating density shall be as applied.

1. 2. Volume fraction of solids in the coat-

ing, VS.

1. A. Electrodeposition primer. For

electrodeposition primer, the volume fraction of solids in the coating shall be as received.

1. B. All other coatings. For all other

coatings, the volume fraction of solids in the coating shall be as applied.

1. 3. Weight fraction of exempt compounds

in the coating, WE.

1. 4. Weight fraction of regulated VOC in

the coating, WO. This value does not include the weight fraction of water or exempt compounds.

1. A. Electrodeposition primer. For

electrodeposition primer, the weight fraction of VOC in the coating shall be as received.

1. B. All other coatings. For all other

coatings, the weight fraction of VOC in the coating shall be as applied.

1. 5. Weight fraction of solids in the coat-

ing, WS.

1. 6. Weight fraction of water in the coat-

ing, WW.

1. (C) Other Test Methods and Calculations.

   1. 1. Calculating the VOC content of the

coating.

1. A. The VOC content of the coating as

applied, expressed as pounds of VOC per gallon of coating (minus water and exempt compounds), shall be determined using Equation (1) as follows:

DC × WO

B = (1)

1− − ∑ ﴾DC × WW﴿ ﴾m DC × WEj﴿ 8.33 j=1 DEj

Where: B = VOC content of the coating as applied, expressed as pounds of VOC per gallon of coating (minus water and exempt compounds); DC = density of coating as applied, expressed as pounds per gallon; WO = weight fraction of regulated VOC in the coating, as applied. This value does not include the weight fraction of water or exempt compounds; WW = weight fraction of water in the coating, as applied; WE = weight fraction of exempt compounds in the coating, as applied; DE = density of each exempt compound, expressed as pounds per gallon; m = number of exempt compounds in the coating; and 8.33 = density of water, expressed as pounds per gallon.

1. B. The VOC content of the coating as

applied, expressed as pounds of VOC per gallon of coating solids, shall be determined using Equation (2) as follows:

DC × WO (2)

BS = VS

Where: BS = VOC content of the coating as applied, expressed as pounds of VOC per gallon of coating solids; DC = density of coating as applied, expressed as pounds per gallon; WO = weight fraction of regulated VOC in the coating, as applied. This value does not include the weight fraction of water or exempt compounds; and VS = volume fraction of solids in the coating, as applied.

1. C. The VOC content of the coating as

applied, expressed as pounds of VOC per pound of coating solids, shall be determined using Equation (3) as follows:

DC × WO (3)

BMWS = DC × WS

Where: BMWS = VOC content of the coating as applied, expressed as pounds of VOC per pound of coating solids; DC = density of coating as applied, expressed as pounds per gallon; WO = weight fraction of regulated VOC in the coating, as applied. This value does not include the weight fraction of water or exempt compounds; and WS = weight fraction of solids in the coating, as applied.

1. 2. Equivalent emission limits. Emission

limits expressed as pounds of VOC per gallon of coating (minus water and exempt compounds) shall be converted to an equivalent emission limit expressed as pounds of VOC per gallon of coating solids using Equation (4) as follows:

L (4)

LS = ﴾1− L ﴿ 7.36

Where: LS = emission limit expressed as pounds of VOC per gallon of coating solids; L = emission limit expressed as pounds of VOC per gallon of coating (minus water and exempt compounds); and 7.36 = average density of solvents, in pounds per gallon, used to originally establish the emission limits.

1. 3. Weighted averaging.

   1. A. The daily volume-weighted aver-

age VOC content of all coatings used in a surface coating unit, expressed as pounds of VOC per gallon of coating (minus water and exempt compounds), shall be calculated using Equation (5) as follows:

n ∑ (Ai × Bi) i=1 (5)

DAVGVW = C

Where: DAVGVW = daily volume-weighted average VOC content, expressed as pounds of VOC per gallon of coating (minus water and exempt compounds); A = daily gallons of each coating used (minus water and exempt compounds) in a surface coating unit; B = VOC content of the coating as applied, expressed as pounds of VOC per gallon of coating (minus water and exempt compounds). This is determined by subparagraph (5)(C)1.A. of this rule; C = total daily gallons of coatings used (minus water and exempt compounds) in a surface coating unit; and n = number of coatings used in a surface coating unit.

1. B. The daily volume-weighted average

VOC content of all coatings used in a surface coating unit, expressed as pounds of VOC per gallon of coating solids, shall be calculated using Equation (6) as follows: Specific to the St. Louis Metropolitan Area

n ) ∑ (ASi × BSi i=1 (6)

DAVGVWS = CS Where: DAVGVWS = daily volume-weighted average VOC content, expressed as pounds of VOC per gallon of coating solids; AS = daily gallons of coating solids for each coating used in a surface coating unit; BS = VOC content of the coating as applied, expressed as pounds of VOC per gallon of coating solids. This is determined by subparagraph (5)(C)1.B. of this rule; CS = total daily gallons of coatings solids used in a surface coating unit; and n = number of coatings used in a surface coating unit.

1. C. The daily mass-weighted average

VOC content of all coatings used in a surface coating unit, expressed as pounds of VOC per pound of coating solids, shall be calculated using Equation (7) as follows:

n ) ∑ (AMWSi × BMWSi i=1 (7)

=

DAVGMWS CMWS

Where: DAVGMWS = daily mass-weighted average VOC content, expressed as pounds of VOC per pound of coating solids; AMWS = daily pounds of coating solids for each coating used in a surface coating unit; BMWS = VOC content of the coating as applied, expressed as pounds of VOC per pound of coating solids. This is determined by subparagraph (5)(C)1.C. of this rule; CMWS = total daily pounds of coatings solids used in a surface coating unit; and n = number of coatings used in a surface coating unit.

1. D. The monthly volume-weighted

average VOC emission rate of an electrodeposition primer, expressed as pounds of VOC per gallon of coating solids deposited, shall be determined using Equation (8) as follows:

n m ∑ LCi DCi WOi + ∑ LDj DDj

MAVGVWS = i=1 j=1 × [1−E/100] n ∑ LCi VSi i=1 Where: MAVGVWS = monthly volume-weighted average VOC emission rate of the electrodeposition primer, expressed as pounds of VOC per gallon of coating solids deposited; LC = monthly volume of each coating consumed, as received, expressed as gallons; DC = density of each coating as received, expressed as pounds per gallon; WO = weight fraction of VOC in each coating, as received; LD = monthly volume of each type of VOC dilution solvent added to the coating, expressed as gallons; DD = density of each type of VOC dilution solvent added to the coating, expressed as pounds per gallon; VS = volume fraction of solids in each coating as received, expressed as gallons of solids per gallon of coating; E = overall control system efficiency; n = number of coatings used; and m = number of VOC dilution solvents used.

1. E. The monthly volume-weighted

average VOC content of all coatings used in a surface coating unit, expressed as pounds of VOC per gallon of coating (minus water and exempt compounds), shall be calculated using Equation (9) as follows:

n ∑ (Ai × Bi)

i=1 (9) =

MAVGVW C Where: MAVGVW = monthly volume-weighted average VOC content as applied, expressed as pounds of VOC per gallon of coating (minus water and exempt compounds); A = monthly gallons of each coating used (minus water and exempt compounds) in a surface coating unit; B = VOC content of the coating as applied, expressed as pounds of VOC per gallon of coating (minus water and exempt compounds), as delivered to the coating applicator. This is determined by subparagraph (5)(C)1.A. of this rule;

1. (8) 10 CSR 10-5

C = total monthly gallons of coatings used (minus water and exempt compounds) in a surface coating unit; and n = number of coatings used in a surface coating unit.

1. 4. The required control system efficien-

cy shall be determined using Equation (10) as follows:

(DAVG − LS)

R = VWS ×100 (10) DAVGVWS

Where: R = required control system efficiency; DAVGVWS = daily volume-weighted average VOC content of all coatings used in a surface coating unit, expressed as pounds of VOC per gallon of coating solids, per subparagraph (5)(C)3.B. of this rule; and LS = emission limits expressed as pounds of VOC per gallon of coating solids, per paragraph (5)(C)2. of this rule.

AUTHORITY: section 643.050, RSMo Supp. 2010.* Original rule filed Dec. 15, 1978, effective July 12, 1979. Amended: Filed March 13, 1980, effective Sept. 12, 1980. Amended: Filed Aug. 15, 1983, effective Jan. 13, 1984. Amended: Filed Dec. 13, 1983, effective Jan. 13, 1984. Rescinded and readopted: Filed June 30, 1989, effective Nov. 26, 1989. Amended: Filed May 19, 2000, effective Jan. 30, 2001. Amended: Filed Nov. 30, 2010, effective Aug. 30, 2011. *Original authority: 643.050, RSMo 1965, amended 1972, 1992, 1993, 1995.