---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchC/part63/subpartMMMMM"
level: "subpart"
label: "Subpart MMMMM"
heading: "National Emission Standards for Hazardous Air Pollutants: Flexible Polyurethane Foam Fabrication Operations"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchC-part63-subpartMMMMM"
sections_count: 19
---

# Subpart MMMMM — National Emission Standards for Hazardous Air Pollutants: Flexible Polyurethane Foam Fabrication Operations

Title 40 C.F.R. — Protection of Environment › Chapter I — Environmental Protection Agency › Subchapter C — Air Programs › Part 63 — National Emission Standards for Hazardous Air Pollutants for Source Categories

## Sections

- [§63.8780. What is the purpose of this subpart?](/cfr/40/63.8780.md)
- [§63.8782. Am I subject to this subpart?](/cfr/40/63.8782.md)
- [§63.8784. What parts of my plant does this subpart cover?](/cfr/40/63.8784.md)
- [§63.8786. When do I have to comply with this subpart?](/cfr/40/63.8786.md)
- [§63.8790. What emission limitations must I meet?](/cfr/40/63.8790.md)
- [§63.8794. What are my general requirements for complying with this subpart?](/cfr/40/63.8794.md)
- [§63.8798. By what date must I conduct performance tests or other initial compliance demonstrations?](/cfr/40/63.8798.md)
- [§63.8800. What performance tests and other procedures must I use to demonstrate compliance with the emission limit for flame lamination?](/cfr/40/63.8800.md)
- [§63.8802. What methods must I use to demonstrate compliance with the emission limitation for loop slitter adhesive use?](/cfr/40/63.8802.md)
- [§63.8806. How do I demonstrate initial compliance with the emission limitations?](/cfr/40/63.8806.md)
- [§63.8810. How do I monitor and collect data to demonstrate continuous compliance?](/cfr/40/63.8810.md)
- [§63.8812. How do I demonstrate continuous compliance with the emission limitations?](/cfr/40/63.8812.md)
- [§63.8816. What notifications must I submit and when?](/cfr/40/63.8816.md)
- [§63.8818. What reports must I submit and when?](/cfr/40/63.8818.md)
- [§63.8820. What records must I keep?](/cfr/40/63.8820.md)
- [§63.8822. In what form and how long must I keep my records?](/cfr/40/63.8822.md)
- [§63.8826. What parts of the General Provisions apply to me?](/cfr/40/63.8826.md)
- [§63.8828. Who implements and enforces this subpart?](/cfr/40/63.8828.md)
- [§63.8830. What definitions apply to this subpart?](/cfr/40/63.8830.md)