---
kind: "section"
citation: "40 C.F.R. § 265.253"
title: "40"
number: "265.253"
heading: "Containment."
url: "https://uscodex.org/cfr/40/265.253"
---

# §265.253. Containment.


If leachate or run-off from a pile is a hazardous waste, then either:

- (a)
  - (1) The pile must be placed on an impermeable base that is compatible with the waste under the conditions of treatment or storage;
  - (2) The owner or operator must design, construct, operate, and maintain a run-on control system capable of preventing flow onto the active portion of the pile during peak discharge from at least a 25-year storm;
  - (3) The owner or operator must design, construct, operate, and maintain a run-off management system to collect and control at least the water volume resulting from a 24-hour, 25-year storm; and
  - (4) Collection and holding facilities (e.g., tanks or basins) associated with run-on and run-off control systems must be emptied or otherwise managed expeditiously to maintain design capacity of the system; or
- (b)
  - (1) The pile must be protected from precipitation and run-on by some other means; and
  - (2) No liquids or wastes containing free liquids may be placed in the pile.

## Notes

### Amendments

[45 FR 33232, May 19, 1980, as amended at 47 FR 32367, July 26, 1982]

### Authority

Authority: 42 U.S.C. 6905, 6906, 6912, 6922, 6923, 6924, 6925, 6935, 6936, 6937, and 6939g.

### Source

Source: 45 FR 33232, May 19, 1980, unless otherwise noted.

### Amendments

[45 FR 33232, May 19, 1980, as amended at 47 FR 32367, July 26, 1982]