15A NCAC 02D .0968       AUTOMOBILE AND LIGHT DUTY TRUCK ASSEMBLY COATINGS

(a)  For the purpose of this Rule, the following definitions apply:

(1)           "Automobile" means a motor vehicle designed to carry up to eight passengers, excluding vans, sport utility vehicles, and motor vehicles designed primarily to transport light loads of property.

(2)           "Automobile Topcoat Protocol" means Protocol For Determining The Daily Volatile Organic Compound Emission Rate Of Automobile and Light-duty Truck Topcoat Operations (EPA-450/3-88-018).

(3)           "Electrodeposition" means a process of applying a protective, corrosion-resistantwaterborne primer on exterior and interior surfaces that provides coverage of recessed areas.  It is a dip coating method that uses an electrical field to apply or deposit the conductive coating onto the part.  The object being painted acts as an electrode that is oppositely charged from the particles of paint in the dip tank.

(4)           "Final repair" means the operations performed and coating(s) applied to completely assembled motor vehicles or to parts that are not yet on a completely assembled vehicle to correct damage or imperfections in the coating.

(5)           "Light-duty truck" means vans, sport utility vehicles, and motor vehicles designed primarily to transport light loads of property with gross vehicle weight rating of 8,500 pounds or less.

(6)           "Primer-surfacer" means an intermediate protective coating applied over the electrodeposition primer (EDP) and under the topcoat.  Primer-surfacer provides adhesion, protection, and appearance properties to the total finish.

(7)           "Solids turnover ratio (RT)" means the ratio of total volume of coating solids that is added to the EDP system in a calendar month divided by the total volume design capacity of the EDP system.

(b)  This Rule applies to automobile and light-duty truck assembly coating operations and related cleaning activities whose emissions of volatile organic compounds exceed the threshold established in Paragraph (b) of Rule .0902 of this Section at:

(1)           automobile or light-duty assembly plants during the vehicle assembly processes with the following primary coating product applications:

(A)          new automobile or new light-duty truck bodies, or body parts for new automobiles or new light-duty trucks;

(B)          other parts that are coated along with these bodies or body parts; or

(C)          additional coatings which include glass bonding primer, adhesives, cavity wax, sealer, deadener, gasket/gasket sealing material, underbody coating, trunk interior coating, bedliner, weatherstrip adhesive, and lubricating waxes/compounds; and

(2)           facilities that perform coating operations on a contractual basis other than plastic or composites molding facilities.

(c)  This Rule does not apply to:

(1)           aerosol coatings of automobile and light-truck assembly coatings;

(2)           coatings that are applied to other parts intended for use in new automobiles or new light-duty trucks (e.g., application of spray primer, color and clear coat to fascia or bumpers) on coating lines that are not related to the vehicle assembly process at automobile or light-duty assembly plants.  They are covered by Rules .0964, and .0967 of this Section; and

(3)           aftermarket repair or replacement parts for automobiles or light-duty trucks that are covered by Rules .0964, and .0967 of this Section.

(d)  With the exception of materials supplied in containers with a net volume of 16 ounces or less, or a net weight of one pound or less, emissions of volatile organic compounds before control for:

(1)           automobile and light-duty truck assembly coatings shall not exceed limits established in Table 1.

 

Table 1.  Volatile Organic Compounds emission limits for automobile and light-duty truck assembly coatings.

Assembly Coating Process

Volatile Organic Compounds Emission Limit

Electrodeposition primer (EDP)

operations (including application area,

spray/rinse stations, and curing oven)

When solids

turnover ratio

(RT) ≥ 0.16;

When

0.040≤ RT <0.160;

When

RT < 0.040;

0.7lb/gal

coatings solids

applied.

0.0840.160-R  x  8.34

lb/gal coating solids

applied.

No VOC

emission

limit.

Primer-surfacer operations(including

application area, flash-off area, and oven)

12.0 lb VOC/gal deposited solids on a daily weighted average

basis as determined by following the procedures in the revised

Automobile Topcoat Protocol

Topcoat operations (including

application area, flash-off area, and

oven)

12.0 lb VOC/gal deposited solids on a daily weighted average

basis as determined by following the procedures in the revised

Automobile Topcoat Protocol

Final repair operations

4.8 lb VOC/gallon of coating less water and less exempt

solvents on a daily weighted average basis or as an occurrence weighted average.

Combined primer-surfacer and topcoat

operations

12.0 lb VOC/gal deposited solids on a daily weighted average

basis as determined by following the procedures in the revised

Automobile Topcoat Protocol

 

(2)           materials used at automobile and light-duty truck assembly coatings facilities shall not exceed limits established in Table 2.

 

Table 2.  Volatile Organic Compounds emission limits for miscellaneous materials used at automobile and light-duty

Material

VOC Emission Limit

Automobile and light-duty truck glass bonding primer

900

Automobile and light-duty truck adhesive

250

Automobile and light-duty truck cavity wax

650

Automobile and light-duty truck sealer

650

Automobile and light-duty truck deadener

650

Automobile and light-duty truck gasket/gasket sealing material

200

Automobile and light-duty truck underbody coating

650

Automobile and light-duty truck trunk interior coating

650

Automobile and light-duty truck bedliner

200

Automobile and light-duty truck weatherstrip adhesive

750

Automobile and light-duty truck lubricating wax/compound

700

 

(e)  EPA Method 24 or 25A (40 CFR Part 60, Appendix A-7) shall be used to determine the volatile organic compounds content of coatings, other than reactive adhesives used at automobile and light-duty truck coating facilities unless the facility maintains records to document the volatile organic compounds content of coating materials from the manufacturer.

(f)  The emission limits established in Paragraph (d) of this Rule may be achieved with a combination of higher-solid solvent-borne coatings, efficient application equipment and bake oven exhaust control.

(g)  The owner or operator of any facility subject to this Rule shall comply with the Rules .0903 and .0958 of this Section.

 

History Note:        Authority G.S. 143-215.3(a)(1); 143-215.107(a)(5);

Eff. September 1, 2010.