40 CFR § 267.203 - What special requirements must I meet for incompatible wastes?

---
identifier: "/us/cfr/t40/s267.203"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 267.203 - What special requirements must I meet for incompatible wastes?"
title_number: 40
title_name: "Protection of Environment"
section_number: "267.203"
section_name: "What special requirements must I meet for incompatible wastes?"
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "I"
subchapter_name: "SOLID WASTES"
part_number: "267"
part_name: "STANDARDS FOR OWNERS AND OPERATORS OF HAZARDOUS WASTE FACILITIES OPERATING UNDER A STANDARDIZED PERMIT"
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. 6902, 6912(a), 6924-6926, and 6930."
regulatory_source: "70 FR 53453, Sept. 8, 2005, unless otherwise noted."
cfr_part: "267"
---


# 267.203 What special requirements must I meet for incompatible wastes?

(a) You may not place incompatible wastes, or incompatible wastes and materials, in the same tank system, unless you comply with § 267.17(b).

(b) You may not place hazardous waste in a tank system that has not been decontaminated and that previously held an incompatible waste or material, unless you comply with § 267.17(b).