---
kind: "section"
citation: "40 C.F.R. § 68.30"
title: "40"
number: "68.30"
heading: "Defining offsite impacts—population."
url: "https://uscodex.org/cfr/40/68.30"
---

# §68.30. Defining offsite impacts—population.

- (a) The owner or operator shall estimate in the RMP the population within a circle with its center at the point of the release and a radius determined by the distance to the endpoint defined in [§ 68.22(a)](/cfr/40/68.22.md?p=a).
- (b) **Population to be defined.** Population shall include residential population. The presence of institutions (schools, hospitals, prisons), parks and recreational areas, and major commercial, office, and industrial buildings shall be noted in the RMP.
- (c) **Data sources acceptable.** The owner or operator may use the most recent Census data, or other updated information, to estimate the population potentially affected.
- (d) **Level of accuracy.** Population shall be estimated to two significant digits.

## Notes

### Source

Source: 61 FR 31718, June 20, 1996, unless otherwise noted.

### Authority

Authority: 42 U.S.C. 7412(r), 7601(a)(1), 7661-7661f.

### Source

Source: 59 FR 4493, Jan. 31, 1994, unless otherwise noted.