---
kind: "section"
citation: "40 C.F.R. § 147.3106"
title: "40"
number: "147.3106"
heading: "Area of review."
url: "https://uscodex.org/cfr/40/147.3106"
---

# §147.3106. Area of review.

- (a) When determining the area of review under [§ 146.6(b)](/cfr/40/146.6.md?p=b) of this chapter, the fixed radius shall be no less than one mile for Class I wells and one-half mile for Class II and III wells. In the case of an application for an area permit, determination of the area of review under [§ 146.6(b)](/cfr/40/146.6.md?p=b) shall be a fixed width of not less than one mile for the circumscribing area of Class I projects and one-half mile for the circumscribing area of Class II and III projects.
- (b) However, in lieu of [§ 146.6(c)](/cfr/40/146.6.md?p=c) of this chapter, if the area of review is determined by a mathematical model pursuant to paragraph [§ 146.6(a)](/cfr/40/146.6.md?p=a) of this chapter, the permissible radius is the result of such calculation even if it is less than one mile for Class I wells and one-half for Class II and III wells.

## 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.