---
kind: "section"
citation: "40 C.F.R. § 147.3107"
title: "40"
number: "147.3107"
heading: "Mechanical integrity."
url: "https://uscodex.org/cfr/40/147.3107"
---

# §147.3107. Mechanical integrity.

- (a) Monitoring of annulus pressure conducted pursuant to [§ 146.8(b)(1)](/cfr/40/146.8.md?p=b-1) shall be preceded by an initial pressure test. A positive gauge pressure on the casing/tubing annulus (filled with liquid) shall be maintained continuously. The pressure shall be monitored monthly.
- (b) Pressure tests conducted pursuant to [§ 146.8(b)(2)](/cfr/40/146.8.md?p=b-2) of this chapter shall be performed with a pressure on the casing/tubing annulus of at least 200 p.s.i. unless otherwise specified by the Director. In addition, pressure tests conducted during well operation shall maintain an injection/annulus pressure differential of at least 100 p.s.i. throughout the tubing length.
- (c) Monitoring of enhanced recovery wells conducted pursuant to [§ 146.8(b)(3)](/cfr/40/146.8.md?p=b-3), must be preceded by an initial pressure test that was conducted no more than 90 days prior to the commencement of monitoring.

## Notes

### Source

Source: 53 FR 43109, Oct. 25, 1988, 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.