{"data":{"id":"us/40-cfr-265.253","jurisdiction":"us","citation":"40 CFR 265.253","heading":"Containment.","body":"If leachate or run-off from a pile is a hazardous waste, then either:\n(a)(1) The pile must be placed on an impermeable base that is compatible with the waste under the conditions of treatment or storage;\n(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;\n(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\n(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\n(b)(1) The pile must be protected from precipitation and run-on by some other means; and\n(2) No liquids or wastes containing free liquids may be placed in the pile.\n[Comment: If collected leachate or run-off is discharged through a point source to waters of the United States, it is subject to the requirements of section 402 of the Clean Water Act, as amended.]","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER I—SOLID WASTES","PART 265—INTERIM STATUS STANDARDS FOR OWNERS AND OPERATORS OF HAZARDOUS WASTE TREATMENT, STORAGE, AND DISPOSAL FACILITIES","Subpart L—Waste Piles"],"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":"22c791c067e5191d631b27b80e150b3e2b50338fe59877074e38e1894b60e306","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-265.252","next":"us/40-cfr-265.254"},"notice":"GroundRules: Original legal text. Not legal advice."}