---
kind: "section"
citation: "40 C.F.R. § 147.305"
title: "40"
number: "147.305"
heading: "Requirements for all wells."
url: "https://uscodex.org/cfr/40/147.305"
---

# §147.305. Requirements for all wells.

- (a) The owner or operator converting an existing well to an injection well shall check the condition of the casing with one of the following logging tools:
  - (1) A Pipe analysis log; or
  - (2) **A Caliper log.**
- (b) **The owner or operator of a new injection well cased with plastic (PVC, ABS, and others) casings shall—**
  - (1) Not construct a well deeper than 500 feet;
  - (2) Use cement and additives compatible with such casing material;
  - (3) Cement the annular space above the injection interval from the bottom of the blank casing to the surface.
- (c) The owner or operator of a newly drilled well shall install centralizers as directed by the Regional Administrator.
- (d) The owner or operator shall as required by the Regional Administrator:
  - (1) **Protect USDWs by—**
    - (i) Setting surface casing 50 feet below the base of the lowermost USDW;
    - (ii) Cementing surface casing by recirculating the cement to the surface from a point 50 feet below the lowermost USDW; or
    - (iii) Isolating all USDWs by placing cement between the outermost casing and the well bore; and
  - (2) Isolate any injection zones by placing sufficient cement to fill the calculated space between the casing and the well bore to a point 250 feet above the injection zone; and
  - (3) **Use cement—**
    - (i) Of sufficient quantity and quality to withstand the maximum operating pressure;
    - (ii) Which is resistant to deterioration from formation and injection fluids; and
    - (iii) **In a quantity no less than 120% of the calculated volume necessary to cement off a zone.**
  - (4) The Regional Administrator may approve alternate casing and cementing practices provided that the owner or operator demonstrates that such practices will adequately protect USDWs.
- (e) **Area of review.** Notwithstanding the alternatives presented in [§ 146.6](/cfr/40/146.6.md) of this chapter, the area of review shall be a fixed radius as described in [§ 146.6(b)](/cfr/40/146.6.md?p=b) of this chapter.
- (f) The applicant must give separate notice of intent to apply for a permit to each owner or tenant of the land within one-quarter mile of the site. The addresses of those to whom notice is given, and a description of how notice is given, shall be submitted with the permit application. The notice shall include:
  - (1) Name and address of applicant;
  - (2) A brief description of the planned injection activities, including well location, name and depth of the injection zone, maximum injection pressure and volume, and fluid to be injected;
  - (3) EPA contact person; and
  - (4) A statement that opportunity to comment will be announced after EPA prepares a draft permit. This requirement may be waived by the Regional Administrator when he determines that individual notice to all land owners and tenants would be impractical.

## Notes

### 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.