{"data":{"id":"us/40-cfr-261.199","jurisdiction":"us","citation":"40 CFR 261.199","heading":"Special requirements for incompatible materials.","body":"(a) Incompatible materials must not be placed in the same tank system.\n(b) Hazardous secondary material must not be placed in a tank system that has not been decontaminated and that previously held an incompatible material.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER I—SOLID WASTES","PART 261—IDENTIFICATION AND LISTING OF HAZARDOUS WASTE","Subpart J—Tank Systems"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"2004d2de7ff00ef5993aa16dd45fd790abde199812de3a5f3827d8cfa9a76ec0","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-261.198","next":"us/40-cfr-261.200"},"notice":"GroundRules: Original legal text. Not legal advice."}