{"data":{"id":"us/40-cfr-264.310","jurisdiction":"us","citation":"40 CFR 264.310","heading":"Closure and post-closure care.","body":"(a) At final closure of the landfill or upon closure of any cell, the owner or operator must cover the landfill or cell with a final cover designed and constructed to:\n(1) Provide long-term minimization of migration of liquids through the closed landfill;\n(2) Function with minimum maintenance;\n(3) Promote drainage and minimize erosion or abrasion of the cover;\n(4) Accommodate settling and subsidence so that the cover's integrity is maintained; and\n(5) Have a permeability less than or equal to the permeability of any bottom liner system or natural subsoils present.\n(b) After final closure, the owner or operator must comply with all post-closure requirements contained in §§ 264.117 through 264.120, including maintenance and monitoring throughout the post-closure care period (specified in the permit under § 264.117). The owner or operator must:\n(1) Maintain the integrity and effectiveness of the final cover, including making repairs to the cap as necessary to correct the effects of settling, subsidence, erosion, or other events;\n(2) Continue to operate the leachate collection and removal system until leachate is no longer detected;\n(3) Maintain and monitor the leak detection system in accordance with §§ 264.301(c)(3)(iv) and (4) and 264.303(c), and comply with all other applicable leak detection system requirements of this part;\n(4) Maintain and monitor the ground-water monitoring system and comply with all other applicable requirements of subpart F of this part;\n(5) Prevent run-on and run-off from eroding or otherwise damaging the final cover; and\n(6) Protect and maintain surveyed benchmarks used in complying with § 264.309.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER I—SOLID WASTES","PART 264—STANDARDS FOR OWNERS AND OPERATORS OF HAZARDOUS WASTE TREATMENT, STORAGE, AND DISPOSAL FACILITIES","Subpart N—Landfills"],"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":"5b833c286865c2e800e7d4caa7e693cc90fe002807e47f2f20d91c286610ac9e","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-264.309","next":"us/40-cfr-264.311"},"notice":"GroundRules: Original legal text. Not legal advice."}