Internal floating roof

{
  "id": "MLC-T-ENV-014762",
  "term": "Internal floating roof",
  "field": "Environment",
  "term_source": "Internal Floating Roof",
  "definition": "1. Cover that rests or floats on the liquid surface (but not necessarily in complete contact with it) inside a storage tank or waste management unit that has a permanently affixed roof.\n\n2. Floating roof located in a storage vessel with a fixed roof. For the purposes of this subpart, an external floating roof located in a storage vessel to which a fixed roof has been added is considered to be an internal floating roof.\n\n3. Pontoon-type (noncontact) or double-deck-type (contact) roof that is designed to rest or float on the stored liquid surface inside a storage vessel that has a fixed roof.\n\n4. Cover that rests or floats on the material surface (but not necessarily in complete contact with it) inside a tank that has a fixed roof.",
  "abbreviation": "IFR",
  "subject": "Built environments",
  "references": [
    "40 CFR 63.1251(CFR 2013); 40 CFR 63.1361 (CFR 2013); 40 CFR 63.101 (CFR 2024)",
    "40 CFR 63.1061 (CFR 2013)",
    "40 CFR 65.2 (CFR 2013)",
    "40 CFR 265.1081 (CFR 2013)"
  ],
  "url": "https://mlchart.com/terminology/environment/internal-floating-roof/"
}