40 CFR § 265.404 - Closure.

---
identifier: "/us/cfr/t40/s265.404"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 265.404 - Closure."
title_number: 40
title_name: "Protection of Environment"
section_number: "265.404"
section_name: "Closure."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "I"
subchapter_name: "SOLID WASTES"
part_number: "265"
part_name: "INTERIM STATUS STANDARDS FOR OWNERS AND OPERATORS OF HAZARDOUS WASTE TREATMENT, STORAGE, AND DISPOSAL FACILITIES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 6905, 6906, 6912, 6922, 6923, 6924, 6925, 6935, 6936, 6937, and 6939g."
regulatory_source: "45 FR 33232, May 19, 1980, unless otherwise noted."
cfr_part: "265"
---


# 265.404 Closure.

At closure, all hazardous waste and hazardous waste residues must be removed from treatment processes or equipment, discharge control equipment, and discharge confinement structures.

[*Comment:* At closure, as throughout the operating period, unless the owner or operator can demonstrate, in accordance with § 261.3 (c) or (d) of this chapter, that any solid waste removed from his treatment process or equipment is not a hazardous waste, the owner or operator becomes a generator of hazardous waste and must manage it in accordance with all applicable requirements of parts 262, 263, and 265 of this chapter.]