---
kind: "section"
citation: "40 C.F.R. § 60.4775"
title: "40"
number: "60.4775"
heading: "What is a new sewage sludge incineration unit?"
url: "https://uscodex.org/cfr/40/60.4775"
---

# §60.4775. What is a new sewage sludge incineration unit?

- (a) A new SSI unit is a SSI unit that meets either of the two criteria specified in paragraph [(a)(1)](#a-1) or [(a)(2)](#a-2) of this section.
  - (1) **Commenced construction after October 14, 2010.**
  - (2) **Commenced modification after September 21, 2011.**
- (b) Physical or operational changes made to your SSI unit to comply with the emission guidelines in [subpart MMMM](/cfr/40/subpartMMMM.md) of this part (Emission Guidelines and Compliance Times for Existing Sewage Sludge Incineration Units) do not qualify as a modification under this subpart.

## Notes

### Source

Source: 76 FR 15404, Mar. 21, 2011, unless otherwise noted.

### Authority

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

### Source

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