03/11/11
"Class I hardboard paneling finish" means finishes that meet the specifications for Class I of Voluntary Product Standard PS-59-73 as approved by the American National Standards Institute.
"Class II hardboard paneling finish" means finishes that meet the specifications for Class II of Voluntary Product Standard PS-59-73 as approved by the American National Standards Institute.
"Exterior siding" means wood panels with a flat surface made of solid wood, hardboard, or waferboard and are intended for use in commercial or residential construction, generally as a covering for an outside wall.
"Flat wood paneling coating line" means a coating line used to apply and dry or cure coatings applied to one of the following flat wood paneling product categories: printed interior panels made of hardwood plywood and thin particle board (i.e., less than or equal to 0.64 centimeter (cm) (0.25 inch [in.]) in thickness); natural finish hardwood plywood panels; and hardwood paneling with Class II finishes.
"Hardboard" is a panel manufactured primarily from inter-felted ligno-cellulosic fibers that are consolidated under heat and pressure in a hot press.
"Hardwood plywood" is plywood whose surface layer is a veneer of hardwood.
"Natural finish hardwood plywood panels" means panels whose original grain pattern is enhanced by essentially transparent finishes frequently supplemented by fillers and toners.
"Printed interior panels" means panels whose grain or natural surface is obscured by fillers and basecoats upon which a simulated grain or decorative pattern is printed.
"Thin particleboard" is a manufactured board that is 0.64 cm (0.25 in.) or less in thickness made of individual wood particles that have been coated with a binder and formed into flat sheets by pressure.
"Tileboard" means paneling that meets the specifications for Class I hardboard given by the standard ANSI/AHA A135.4-1995 as approved by the American National Standards Institute. The standard specifies requirements and test methods for water absorption, thickness swelling, modulus of rupture, tensile strength, surface finish, dimensions, squareness, edge straightness, and moisture content for five classes of hardboard. Tileboard is also known as Class I hardboard or tempered hardboard.
Table 23-1. VOC Emission Limits from Flat Wood Paneling Coatings.
Flat Wood Paneling Product Category | VOC Content Limits in Coatings, Inks, or Adhesives Being Applied | |
lb/gal | g/L | |
Printed interior panels made of hardwood, plywood, or thin particleboard | 2.1* | 250 |
Natural finish hardwood plywood panels | 2.1 | 250 |
Class II finishes on hardboard panels | 2.1 | 250 |
Tileboard | 2.1 | 250 |
Exterior siding | 2.1 | 250 |
*This limit of 2.1 lb/gal is equivalent to 5.0 lb VOC per 1,000 ft2 coating area.
(23-1)
where:
E = The required overall emission reduction efficiency of the control system for the day.
VOCa = The maximum VOC content of the coatings, as applied, used each day on a coating line in units of lb VOC/gal of coating material applied (or kg VOC/L of coating material applied), as determined by the applicable test methods and procedures specified in Appendix B of this regulation.
S = applicable VOC emission limitation in Table 23-1 of this regulation in terms of lb VOC/gal of coating material applied (or kg VOC/L of coating material applied).
(23-2)
where:
T = Total VOC emissions from coating lines at the facility for each category of flat wood paneling (as specified in 23.3.1 of this regulation) before the application of capture systems and control devices in units of kg VOC/day (lb VOC/day).
n = Number of different coatings applied on each coating line at the facility.
i = Subscript denoting an individual coating.
C = Mass of VOC per area of coated finished product in units of kg VOC/100 m2 (lb VOC/1,000 ft2).
D = The surface area coated at the facility each day in units of m2/day (ft2/day).
a = Constant = 100 m2 if using metric units.
= 1,000 ft2 if using English units.
7 Del. Admin. Code § 1124-23.0