---
kind: "section"
citation: "40 C.F.R. § 60.6665"
title: "40"
number: "60.6665"
heading: "What are the emission limits for air curtain incinerators that burn 100 percent wood waste, clean lumber, and/or yard waste?"
url: "https://uscodex.org/cfr/40/60.6665"
---

# §60.6665. What are the emission limits for air curtain incinerators that burn 100 percent wood waste, clean lumber, and/or yard waste?


If your air curtain incinerator with a capacity to combust greater than 250 tons per day of municipal solid waste combusts a fuel feed stream of 100 percent wood waste, 100 percent clean lumber, 100 percent yard waste, or a 100 percent mixture of only wood waste, clean lumber, and/or yard waste, and no other municipal solid waste materials, you must only meet the emission limits in this section.

- (a) By 180 days after your final compliance date, you must meet two limits:
  - (1) The opacity limit is 10 percent (6-minute average) except as provided in [paragraph (a)(2)](#a-2) of this section.
  - (2) The opacity limit is 35 percent (6-minute average) during the startup period that is within the first 30 minutes of operation.
- (b) Reserved

## Notes

### Source

Source: 91 FR 11860, Mar. 10, 2026, unless otherwise noted.

### Authority

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

### Source

Source: 36 FR 24877, Dec. 23, 1971, unless otherwise noted.