U.S. Code of Federal Regulations

Regulations most recently checked for updates: Jan 21, 2026

All TitlesTitle 40Chapter IPart 63Subpart WWWW - Subpart WWWW—National Emissions Standards for Hazardous Air Pollutants: Reinforced Plastic Composites Production

WHAT THIS SUBPART COVERS
§ 63.5780 - What is the purpose of this subpart?
§ 63.5785 - Am I subject to this subpart?
§ 63.5787 - What if I also manufacture fiberglass boats or boat parts?
§ 63.5790 - What parts of my plant does this subpart cover?
§ 63.5795 - How do I know if my reinforced plastic composites production facility is a new affected source or an existing affected source?

CALCULATING ORGANIC HAP EMISSIONS FACTORS FOR OPEN MOLDING AND CENTRIFUGAL CASTING
§ 63.5796 - What are the organic HAP emissions factor equations in Table 1 to this subpart, and how are they used in this subpart?
§ 63.5797 - How do I determine the organic HAP content of my resins and gel coats?
§ 63.5798 - What if I want to use, or I manufacture, an application technology (new or existing) whose organic HAP emissions characteristics are not represented by the equations in Table 1 to this subpart?
§ 63.5799 - How do I calculate my facility's organic HAP emissions on a tpy basis for purposes of determining which paragraphs of apply?

COMPLIANCE DATES AND STANDARDS
§ 63.5800 - When do I have to comply with this subpart?
§ 63.5805 - What standards must I meet to comply with this subpart?

OPTIONS FOR MEETING STANDARDS
§ 63.5810 - What are my options for meeting the standards for open molding and centrifugal casting operations at new and existing sources?
§ 63.5820 - What are my options for meeting the standards for continuous lamination/casting operations?
§ 63.5830 - What are my options for meeting the standards for pultrusion operations subject to the 60 weight percent organic HAP emissions reductions requirement?

GENERAL COMPLIANCE REQUIREMENTS
§ 63.5835 - What are my general requirements for complying with this subpart?

TESTING AND INITIAL COMPLIANCE REQUIREMENTS
§ 63.5840 - By what date must I conduct a performance test or other initial compliance demonstration?
§ 63.5845 - When must I conduct subsequent performance tests?
§ 63.5850 - How do I conduct performance tests, performance evaluations, and design evaluations?
§ 63.5855 - What are my monitor installation and operation requirements?
§ 63.5860 - How do I demonstrate initial compliance with the standards?
§ 63.5865 - What data must I generate to demonstrate compliance with the standards for continuous lamination/casting operations?
§ 63.5870 - How do I calculate annual uncontrolled and controlled organic HAP emissions from my wet-out area(s) and from my oven(s) for continuous lamination/casting operations?
§ 63.5875 - How do I determine the capture efficiency of the enclosure on my wet-out area and the capture efficiency of my oven(s) for continuous lamination/casting operations?
§ 63.5880 - How do I determine how much neat resin plus is applied to the line and how much neat gel coat plus is applied to the line for continuous lamination/casting operations?
§ 63.5885 - How do I calculate percent reduction to demonstrate compliance for continuous lamination/casting operations?
§ 63.5890 - How do I calculate an organic HAP emissions factor to demonstrate compliance for continuous lamination/casting operations?

CONTINUOUS COMPLIANCE REQUIREMENTS
§ 63.5895 - How do I monitor and collect data to demonstrate continuous compliance?
§ 63.5900 - How do I demonstrate continuous compliance with the standards?

NOTIFICATIONS, REPORTS, AND RECORDS
§ 63.5905 - What notifications must I submit and when?
§ 63.5910 - What reports must I submit and when?
§ 63.5912 - How do I submit my reports?
§ 63.5915 - What records must I keep?
§ 63.5920 - In what form and how long must I keep my records?

OTHER REQUIREMENTS AND INFORMATION
§ 63.5925 - What parts of the General Provisions apply to me?
§ 63.5930 - Who implements and enforces this subpart?
§ 63.5935 - What definitions apply to this subpart?
Appendix - Table 1 to Subpart WWWW of Part 63—Equations To Calculate Organic HAP Emissions Factors for Specific Open Molding and Centrifugal Casting Process Streams
Appendix - Table 2 to Subpart WWWW of Part 63—Compliance Dates for New and Existing Reinforced Plastic Composites Facilities
Appendix - Table 3 to Subpart WWWW of Part 63—Organic HAP Emissions Limits for Existing Open Molding Sources, New Open Molding Sources Emitting Less Than 100 TPY of HAP, and New and Existing Centrifugal Casting and Continuous Lamination/Casting Sources that Emit Less Than 100 TPY of HAP
Appendix - Table 4 to Subpart WWWW of Part 63—Work Practice Standards
Appendix - Table 5 to Subpart WWWW of Part 63—Alternative Organic HAP Emissions Limits for Open Molding, Centrifugal Casting, and SMC Manufacturing Operations Where the Standards Are Based on a 95 Percent Reduction Requirement
Appendix - Table 6 to Subpart WWWW of Part 63—Basic Requirements for Performance Tests, Performance Evaluations, and Design Evaluations for New and Existing Sources Using Add-On Control Devices
Appendix - Table 7 to Subpart WWWW of Part 63—Options Allowing Use of the Same Resin Across Different Operations That Use the Same Resin Type
Appendix - Table 8 to Subpart WWWW of Part 63—Initial Compliance With Organic HAP Emissions Limits
Appendix - Table 9 to Subpart WWWW of Part 63—Initial Compliance With Work Practice Standards
Appendix - Table 10 to Subpart WWWW of Part 63—Data Requirements for New and Existing Continuous Lamination Lines and Continuous Casting Lines Complying With a Percent Reduction Limit on a Per Line Basis
Appendix - Table 11 to Subpart WWWW of Part 63—Data Requirements for New and Existing Continuous Lamination and Continuous Casting Lines Complying With a Percent Reduction Limit or a Lbs/Ton Limit on an Averaging Basis
Appendix - Table 12 to Subpart WWWW of Part 63—Data Requirements for New and Existing Continuous Lamination Lines and Continuous Casting Lines Complying With a Lbs/Ton Organic HAP Emissions Limit on a Per Line Basis
Appendix - Table 13 to Subpart WWWW of Part 63—Applicability and Timing of Notifications
Appendix - Table 14 to Subpart WWWW of Part 63—Requirements for Reports
Appendix - Table 15 to Subpart WWWW of Part 63—Applicability of General Provisions (Subpart A) to Subpart WWWW of Part 63
Appendix Appendix A - Appendix A to Subpart WWWW of Part 63—Test Method for Determining Vapor Suppressant Effectiveness
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