40 CFR § 266.220 - What does a storage and treatment conditional exemption do?

---
identifier: "/us/cfr/t40/s266.220"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 266.220 - What does a storage and treatment conditional exemption do?"
title_number: 40
title_name: "Protection of Environment"
section_number: "266.220"
section_name: "What does a storage and treatment conditional exemption do?"
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "I"
subchapter_name: "SOLID WASTES"
part_number: "266"
part_name: "STANDARDS FOR THE MANAGEMENT OF SPECIFIC HAZARDOUS WASTES AND SPECIFIC TYPES OF HAZARDOUS WASTE MANAGEMENT FACILITIES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 1006, 2002(a), 3001-3009, 3014, 3017, 6905, 6906, 6912, 6921, 6922, 6924-6927, 6934, and 6937."
regulatory_source: "50 FR 666, Jan. 4, 1985, unless otherwise noted."
cfr_part: "266"
---


# 266.220 What does a storage and treatment conditional exemption do?

The storage and treatment conditional exemption exempts your low-level mixed waste from the regulatory definition of hazardous waste in 40 CFR 261.3 if your waste meets the eligibility criteria in § 266.225 and you meet the conditions in § 266.230.