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Title 40

Displaying title 40, up to date as of 7/20/2026. Title 40 was last amended 7/16/2026.
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  1. Title 40 —Protection of Environment
  2. Chapter I —Environmental Protection Agency
  3. Subchapter C —Air Programs
  4. Part 63 —National Emission Standards for Hazardous Air Pollutants for Source Categories
  5. Subpart WWWW   View Full Text
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eCFR Content

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Title 40Protection of EnvironmentPart / Section
Chapter IEnvironmental Protection Agency1 – 1099
Subchapter CAir Programs50 – 99
Part 63National Emission Standards for Hazardous Air Pollutants for Source Categories63.1 – 63.12099
Subpart WWWWNational Emissions Standards for Hazardous Air Pollutants: Reinforced Plastic Composites Production63.5780 – 63.5935
What This Subpart Covers63.5780 – 63.5795
§ 63.5780What is the purpose of this subpart?
§ 63.5785Am I subject to this subpart?
§ 63.5787What if I also manufacture fiberglass boats or boat parts?
§ 63.5790What parts of my plant does this subpart cover?
§ 63.5795How 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 Casting63.5796 – 63.5799
§ 63.5796What are the organic HAP emissions factor equations in Table 1 to this subpart, and how are they used in this subpart?
§ 63.5797How do I determine the organic HAP content of my resins and gel coats?
§ 63.5798What 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?
§ 63.5799How do I calculate my facility's organic HAP emissions on a tpy basis for purposes of determining which paragraphs of § 63.5805 apply?
Compliance Dates and Standards63.5800 – 63.5805
§ 63.5800When do I have to comply with this subpart?
§ 63.5805What standards must I meet to comply with this subpart?
Options for Meeting Standards63.5810 – 63.5830
§ 63.5810What are my options for meeting the standards for open molding and centrifugal casting operations at new and existing sources?
§ 63.5820What are my options for meeting the standards for continuous lamination/casting operations?
§ 63.5830What are my options for meeting the standards for pultrusion operations subject to the 60 weight percent organic HAP emissions reductions requirement?
General Compliance Requirements63.5835
§ 63.5835What are my general requirements for complying with this subpart?
Testing and Initial Compliance Requirements63.5840 – 63.5890
§ 63.5840By what date must I conduct a performance test or other initial compliance demonstration?
§ 63.5845When must I conduct subsequent performance tests?
§ 63.5850How do I conduct performance tests, performance evaluations, and design evaluations?
§ 63.5855What are my monitor installation and operation requirements?
§ 63.5860How do I demonstrate initial compliance with the standards?
§ 63.5865What data must I generate to demonstrate compliance with the standards for continuous lamination/casting operations?
§ 63.5870How 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?
§ 63.5875How 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?
§ 63.5880How 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?
§ 63.5885How do I calculate percent reduction to demonstrate compliance for continuous lamination/casting operations?
§ 63.5890How do I calculate an organic HAP emissions factor to demonstrate compliance for continuous lamination/casting operations?
Continuous Compliance Requirements63.5895 – 63.5900
§ 63.5895How do I monitor and collect data to demonstrate continuous compliance?
§ 63.5900How do I demonstrate continuous compliance with the standards?
Notifications, Reports, and Records63.5905 – 63.5920
§ 63.5905What notifications must I submit and when?
§ 63.5910What reports must I submit and when?
§ 63.5912How do I submit my reports?
§ 63.5915What records must I keep?
§ 63.5920In what form and how long must I keep my records?
Other Requirements and Information63.5925 – 63.5935
§ 63.5925What parts of the General Provisions apply to me?
§ 63.5930Who implements and enforces this subpart?
§ 63.5935What definitions apply to this subpart?
Table 1 to Subpart WWWW of Part 63
Equations To Calculate Organic HAP Emissions Factors for Specific Open Molding and Centrifugal Casting Process Streams
Table 2 to Subpart WWWW of Part 63
Compliance Dates for New and Existing Reinforced Plastic Composites Facilities
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
Table 4 to Subpart WWWW of Part 63
Work Practice Standards
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
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
Table 7 to Subpart WWWW of Part 63
Options Allowing Use of the Same Resin Across Different Operations That Use the Same Resin Type
Table 8 to Subpart WWWW of Part 63
Initial Compliance With Organic HAP Emissions Limits
Table 9 to Subpart WWWW of Part 63
Initial Compliance With Work Practice Standards
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
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
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
Table 13 to Subpart WWWW of Part 63
Applicability and Timing of Notifications
Table 14 to Subpart WWWW of Part 63
Requirements for Reports
Table 15 to Subpart WWWW of Part 63
Applicability of General Provisions (Subpart A) to Subpart WWWW of Part 63
Appendix A to Subpart WWWW of Part 63
Test Method for Determining Vapor Suppressant Effectiveness
eCFR Content