---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchC/part60/subpartNNN"
level: "subpart"
label: "Subpart NNN"
heading: "Standards of Performance for Volatile Organic Compound (VOC) Emissions From Synthetic Organic Chemical Manufacturing Industry (SOCMI) Distillation Operations After December 30, 1983, and on or Before April 25, 2023"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchC-part60-subpartNNN"
sections_count: 9
---

# Subpart NNN — Standards of Performance for Volatile Organic Compound (VOC) Emissions From Synthetic Organic Chemical Manufacturing Industry (SOCMI) Distillation Operations After December 30, 1983, and on or Before April 25, 2023

Title 40 C.F.R. — Protection of Environment › Chapter I — Environmental Protection Agency › Subchapter C — Air Programs › Part 60 — Standards of Performance for New Stationary Sources

## Sections

- [§60.660. Applicability and designation of affected facility.](/cfr/40/60.660.md)
- [§60.661. Definitions.](/cfr/40/60.661.md)
- [§60.662. Standards.](/cfr/40/60.662.md)
- [§60.663. Monitoring of emissions and operations.](/cfr/40/60.663.md)
- [§60.664. Test methods and procedures.](/cfr/40/60.664.md)
- [§60.665. Reporting and recordkeeping requirements.](/cfr/40/60.665.md)
- [§60.666. Reconstruction.](/cfr/40/60.666.md)
- [§60.667. Chemicals affected by subpart NNN.](/cfr/40/60.667.md)
- [§60.668. Delegation of authority.](/cfr/40/60.668.md)