---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchC/part63/subpartVVVVVV"
level: "subpart"
label: "Subpart VVVVVV"
heading: "National Emission Standards for Hazardous Air Pollutants for Chemical Manufacturing Area Sources"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchC-part63-subpartVVVVVV"
sections_count: 10
---

# Subpart VVVVVV — National Emission Standards for Hazardous Air Pollutants for Chemical Manufacturing Area Sources

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

- [§63.11494. What are the applicability requirements and compliance dates?](/cfr/40/63.11494.md)
- [§63.11495. What are the management practices and other requirements?](/cfr/40/63.11495.md)
- [§63.11496. What are the standards and compliance requirements for process vents?](/cfr/40/63.11496.md)
- [§63.11497. What are the standards and compliance requirements for storage tanks?](/cfr/40/63.11497.md)
- [§63.11498. What are the standards and compliance requirements for wastewater systems?](/cfr/40/63.11498.md)
- [§63.11499. What are the standards and compliance requirements for heat exchange systems?](/cfr/40/63.11499.md)
- [§63.11500. What compliance options do I have if part of my plant is subject to both this subpart and another Federal standard?](/cfr/40/63.11500.md)
- [§63.11501. What are the notification, recordkeeping, and reporting requirements?](/cfr/40/63.11501.md)
- [§63.11502. What definitions apply to this subpart?](/cfr/40/63.11502.md)
- [§63.11503. Who implements and enforces this subpart?](/cfr/40/63.11503.md)