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Table 1A to Subpart DDDD of Part 63—Production-Based Compliance Options

Production-Based Compliance Options

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  3. Title 40
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  5. Chapter I
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  7. Part 63
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  9. Subpart DDDD
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  11. Subject Group Other Requirements and Information
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  13. Appendix Table 1A to Subpart DDDD of Part 63
CorpusDaily eCFR
Displayed edition2026-04-23
Last updated2026-04-23

Table 1A to Subpart DDDD of Part 63—Production-Based Compliance Options

For the following process units . . .You must meet the following production-based compliance option (total HAP a basis) . . .
(1) Fiberboard mat dryer heated zones (at new affected sources only)0.022 lb/MSF 1⁄2″.
(2) Green rotary dryers0.058 lb/ODT.
(3) Hardboard ovens0.022 lb/MSF 1⁄8″.
(4) Press predryers (at new affected sources only)0.037 lb/MSF 1⁄2″.
(5) Pressurized refiners0.039 lb/ODT.
(6) Primary tube dryers0.26 lb/ODT.
(7) Reconstituted wood product board coolers (at new affected sources only)0.014 lb/MSF 3⁄4″.
(8) Reconstituted wood product presses0.30 lb/MSF 3⁄4″.
(9) Softwood veneer dryer heated zones0.022 lb/MSF 3⁄8″.
(10) Rotary strand dryers0.18 lb/ODT.
(11) Secondary tube dryers0.010 lb/ODT.
a Total HAP, as defined in § 63.2292, includes acetaldehyde, acrolein, formaldehyde, methanol, phenol, and propionaldehyde. lb/ODT = pounds per oven-dried ton; lb/MSF = pounds per thousand square feet with a specified thickness basis (inches). Section 63.2262(j) shows how to convert from one thickness basis to another.
Note: There is no production-based compliance option for conveyor strand dryers.