---
kind: "section"
citation: "40 C.F.R. § 63.1177"
title: "40"
number: "63.1177"
heading: "Am I subject to this subpart?"
url: "https://uscodex.org/cfr/40/63.1177"
---

# §63.1177. Am I subject to this subpart?


You are subject to this subpart if you own or operate an existing, new, or reconstructed mineral wool production facility that is located at a plant site that is a major source of hazardous air pollutant (HAP) emissions, meaning the plant emits or has the potential to emit any single HAP at a rate of 9.07 megagrams (10 tons) or more per year or any combination of HAPs at a rate of 22.68 megagrams (25 tons) or more per year.


## Notes

### Source

Source: 64 FR 29503, June 1, 1999, unless otherwise noted.

### Authority

Authority: 42 U.S.C. 7401 et seq.

### Source

Source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.