---
kind: "section"
citation: "40 C.F.R. § 147.2927"
title: "40"
number: "147.2927"
heading: "Permit modification."
url: "https://uscodex.org/cfr/40/147.2927"
---

# §147.2927. Permit modification.

- (a) Permits may be modified for the following causes only (with the exceptions listed in [paragraph (b)](#b) of this section regarding minor modifications):
  - (1) There are substantial changes to the facility or activity which occurred after permit issuance that justify revised or additional permit conditions.
  - (2) The Regional Administrator has received information (e.g., from monitoring reports, inspections) which warrants a modified permit.
  - (3) **The regulations or standards on which the permit was based have changed.**
  - (4) **The Regional Administrator has received notice of a proposed permit transfer.**
  - (5) An interested person requests in writing that a permit be modified, and the Regional Administrator determines that cause for modification exists.
  - (6) Cause exists for termination under [§ 147.2928](/cfr/40/147.2928.md), but the Regional Administrator determines that permit modification is appropriate.
- (b) **Minor modifications.**
  - (1) Minor modifications do not require that the procedures listed in [paragraph (c)](#c) of this section be followed.
  - (2) **Minor modifications consist of—**
    - (i) Correcting typographical errors;
    - (ii) Requiring more frequent monitoring or reporting;
    - (iii) Changing ownership or operational control (see [§ 147.2926](/cfr/40/147.2926.md), Permit Transfers); or
    - (iv) **Changing quantities or types of injected fluids, provided—**
      - (A) The facility can operate within conditions of permit;
      - (B) **The facility classification would not change.**
- (c) **Modification procedures.**
  - (1) A draft permit shall be prepared with proposed modifications.
  - (2) The draft permit shall follow the general permitting procedures (i.e., public comment period, etc.) before a final decision is made.
  - (3) Only the changed conditions shall be addressed in the draft permit or public review.

## Notes

### Authority

Authority: Safe Drinking Water Act, 42 U.S.C. 300h.

### Source

Source: 49 FR 45309, Nov. 15, 1984, unless otherwise noted.

### Authority

Authority: 42 U.S.C. 300f et seq.; and 42 U.S.C. 6901 et seq.

### Source

Source: 49 FR 20197, May 11, 1984, unless otherwise noted.