326 IAC 8-21-3 VOC emissions control requirements

Sec. 3. (a) The owner or operator of a source that is subject to this rule shall not apply to aerospace vehicles or components any coatings, including any VOC containing materials added to the original coating supplied by the manufacturer, that contain VOC in excess of the limits specified as follows: VOC Content Limit for Primers, Topcoats, and Chemical Milling Maskants (lbs/gallon)a Coating Type Limit Primer 2.9 Primer for general aviation rework 4.5 Exterior primer for large commercial aircraft (components or fully assembled) 5.4 Topcoat 3.5 Topcoat for general aviation rework 4.5 Self-priming topcoat 3.5 Self-priming topcoat for general aviation rework 4.5 Chemical milling maskant, type I 5.2 Chemical milling maskant, type II 1.3 aCoating limits expressed in terms of pounds of VOC per gallon of coating less water and less exempt solvent. VOC Content Limits for Specialty Coatings (g/L)b Coating Type Limit Coating Type Limit Ablative coating 600 Flight test coatings: Adhesion promoter 890 Missile or single use aircraft 420 Adhesive bonding primers: All other 840 Cured at 250°F or below 850 Fuel tank coating 720 Cured above 250°F 1030 High temperature coating 850 Adhesives: Insulation covering 740 Commercial interior adhesive 760 Intermediate release coating 750 Cyanoacrylate adhesive 1020 Lacquer 830 Fuel tank adhesive 620 Maskants: Nonstructural adhesive 360 Bonding maskant 1230 Rocket motor bonding adhesive 890 Critical use and line sealer maskant 1020 Rubber based adhesive 850 Seal coat maskant 1230 Structural autoclavable adhesive 60 Metallized epoxy coating 740 Structural nonautoclavable adhesive 850 Mold release 780 Antichafe coating 660 Optical antireflective coating 750 Bearing coating 620 Part marking coating 850 Caulking and smoothing compounds 850 Pretreatment coating 780 Chemical agent resistant coating 550 Rain erosion resistant coating 850 Clear coating 720 Rocket motor nozzle coating 660 Commercial exterior aerodynamic structure primer 650 Scale inhibitor 880 Compatible substrate primer 780 Screen print ink 840 Corrosion prevention compound 710 Sealants: Cryogenic flexible primer 645 Extrudable/rollable/brushable sealant 280 Dry lubricative material 880 Sprayable sealant 600 Cryoprotective coating 600 Silicone insulation material 850 Electric or radiation effect coating 800 Solid film lubricant 880 Electrostatic discharge and electromagnetic interference (EMI) coating 800 Specialized function coating 890 Elevated temperature Skydrol resistant commercial primer 740 Temporary protective coating 320 Epoxy polyamide topcoat 660 Thermal control coating 800 Fire resistant (interior) coating 800 Wet fastener installation coating 675 Flexible primer 640 Wing coating 850 bCoating limits expressed in terms of mass (grams) of VOC per volume (liters) of coating less water and less exempt solvent. (b) The following coating applications are exempt from the VOC content limits listed in subsection (a): (1) Touch-up, aerosol, and U.S. Department of Defense "classified" coatings. (2) Coating of space vehicles. (3) Facilities that use separate formulations in volumes of less than fifty (50) gallons per year subject to a maximum exemption of two hundred (200) gallons total for such formulations applied annually. (c) The broad categories of primers, topcoats (including self priming topcoats), and chemical milling maskants (Type I or II) are not specialty coatings as listed in the table in subsection (a). The requirements do not apply to facilities that use separate formulations of primers, topcoats, and chemical milling maskants (Type I or II) in volumes of less than fifty (50) gallons per year, subject to a maximum exemption of two hundred (200) gallons total for such formulations applied annually.