Title 7 Natural Resources and Environmental Control
1124 Control of Volatile Organic Compound Emissions
21.0 Coating of Magnet Wire
11/29/1994
21.1 Applicability
21.1.1 The provisions of 21.0 of this regulation apply to any magnet wire coating unit.
21.1.2 The provisions of 21.0 of this regulation do not apply to any magnet wire coating unit within a facility whose emissions without control devices from all magnet wire coating units within the facility are less than 6.8 kilograms (kg) (15 pounds [lb]) of volatile organic compounds (VOCs) per day.
21.1.3 An owner or operator of a facility whose emissions are below the applicability threshold in 21.1.2 of this regulation shall comply with the certification, recordkeeping, and reporting requirements of 21.7.1 of this regulation.
21.1.4 Any facility that becomes or is currently subject to the provisions of 21.0 of this regulation by exceeding the applicability threshold in 21.1.2 of this regulation will remain subject to these provisions even if its emissions later fall below the applicability threshold.
21.1.5 Any facility that is currently subject to a state or federal rule promulgated pursuant to the Clean Air Act Amendments of 1977 by exceeding an applicability threshold is and will remain subject to these provisions, even if its throughput or emissions have fallen or later fall below the applicability threshold.
21.2 Definitions. As used in 21.0 of this regulation, all terms not defined herein shall have the meaning given them in the November 15, 1990 Clean Air Act Amendments (CAAA), or in 2.0 of this regulation.
“Magnet wire coating unit” means a coating unit in which an electrically insulating varnish or enamel is applied onto the surface of wire for use in electrical machinery.
21.3 Standards
21.3.1 No owner or operator of a magnet wire coating unit subject to 21.0 of this regulation shall cause or allow the use of any coating with VOC content in excess of 0.20 kilograms per liter (kg/L) (1.7 pounds per gallon [lb/gal]) of coating, excluding water and exempt compounds, as applied.
21.3.2 As an alternative to compliance with the emission limit in 21.3.1 of this regulation, an owner or operator of a magnet wire coating unit subject to 21.0 of this regulation may meet the requirements of 21.4 or 21.5 of this regulation.
21.4 Daily-weighted average limitation. No owner or operator of a magnet wire coating unit subject to 21.0 of this regulation shall apply, during any day, coatings on that unit whose daily-weighted average VOC content, calculated in accordance with the procedure specified in Appendix C of this regulation, exceeds the emission limit in 21.3.1 of this regulation.
21.5 Control devices
21.5.1 An owner or operator of a magnet wire coating unit subject to 21.0 of this regulation may comply with 21.0 of this regulation by:
21.5.1.1 Installing and operating a capture system on that unit.
21.5.1.2 Installing and operating a control device on that unit.
21.5.1.3 Determining for each day the overall emission reduction efficiency needed to demonstrate compliance. The overall emission reduction needed for a day is the lesser of the value calculated according to the procedure in 3.0 of Appendix C of this regulation for that day or 95%.
21.5.1.4 Demonstrating each day that the overall emission reduction efficiency achieved for that day, as determined in 3.0 of Appendix D of this regulation, is greater than or equal to the overall emission reduction efficiency required for that day.
21.5.2 An owner or operator of a magnet wire coating unit subject to 21.0 of this regulation shall ensure that:
21.5.2.1 A capture system and control device are operated at all times that the unit is in operation, and the owner or operator demonstrates compliance with 21.0 of this regulation through the applicable coating analysis and capture system and control device efficiency test methods specified in Appendix B, Appendix D and Appendix E of this regulation and in accordance with the capture efficiency test methods in Appendix D of this regulation.
21.5.2.2 The control device is equipped with the applicable monitoring equipment specified in 2.0 of Appendix D of this regulation, and the monitoring equipment is installed, calibrated, operated, and maintained according to the vendor's specifications at all times the control device is in use.
21.6 Test methods. The test methods found in Appendix A through Appendix D of this regulation shall be used to determine compliance with 21.0 of this regulation.
21.7 Recordkeeping and reporting
21.7.1 An owner or operator of a magnet wire coating unit that is exempt from the emission limitations in 21.3 of this regulation shall comply with the certification, recordkeeping, and reporting requirements in 4.2 of this regulation.
21.7.2 An owner or operator of a magnet wire coating unit subject to 21.0 of this regulation and complying with 21.3 of this regulation by the use of complying coatings shall comply with the certification, recordkeeping, and reporting requirements in 4.3 of this regulation.
21.7.3 An owner or operator of a magnet wire coating unit subject to 21.0 of this regulation and complying with 21.4 of this regulation by daily-weighted averaging shall comply with the certification, recordkeeping, and reporting requirements in 4.4 of this regulation.
21.7.4 An owner or operator of a magnet wire coating unit subject to 21.0 of this regulation and complying with 21.5 of this regulation by the use of control devices shall comply with the testing, reporting, and recordkeeping requirements in 4.5 of this regulation.
