Cover Device

{
  "id": "MLC-T-ENV-006826",
  "term": "Cover Device",
  "field": "Environment",
  "definition": "1. With respect to coating mix preparation equipment, a device that lies over the equipment opening to prevent VOC from escaping and that meets the requirements found in § 60.712(c)(1)-(5).\n\n2. Used in the wastewater provisions, a device or system which is placed on or over a waste management unit containing wastewater or residuals so that the entire surface area is enclosed to minimize air emissions. A cover may have openings necessary for operation, inspection, and maintenance of the waste management unit such as access hatches, sampling ports, and gauge wells provided that each opening is closed when not in use. Examples of covers include a fixed roof installed on a wastewater tank, a lid installed on a container, and an air-supported enclosure installed over a waste management unit. [40 CFR 63.1361 (CFR 2013)]\n\n3. Device which is placed on top of or over a material such that the entire surface area of the material is enclosed and sealed. A cover may have openings (such as access hatches, sampling ports, and gauge wells) if those openings are necessary for operation, inspection, maintenance, or repair of the unit on which the cover is installed, provided that each opening is closed and sealed when the opening is not in use. In addition, a cover may have one or more safety devices. Examples of a cover include, but are not limited to, a fixed-roof installed on a tank, an external floating roof installed on a tank, and a lid installed on a drum or other container.\n\n4. Device or system that provides a continuous barrier over the material managed in a surface impoundment to prevent or reduce air pollutant emissions to the atmosphere. A cover may have openings needed for operation, inspection, sampling, maintenance, and repair of the surface impoundment provided that each opening is closed when not in use (e.g., access hatches, sampling ports). Examples of a cover for a surface impoundment include, but are not limited to, a floating membrane cover placed on the surface of the material in the surface impoundment or an air-supported structure installed over the surface impoundment.\n\n5. With respect to coating mix preparation equipment, a device that fits over the equipment opening to prevent emissions of volatile organic compounds (VOC) from escaping.\n\n6. Soil or other material used to cover sewage sludge placed on an active sewage sludge unit. [40 CFR 503.21 (CFR 2013)]]\n\n7. Device that provides a continuous barrier over the hazardous waste managed in a unit to prevent or reduce air pollutant emissions to the atmosphere. A cover may have openings (such as access hatches, sampling ports, gauge wells) that are necessary for operation, inspection, maintenance, and repair of the unit on which the cover is used. A cover may be a separate piece of equipment which can be detached and removed from the unit or a cover may be formed by structural features permanently integrated into the design of the unit.",
  "references": [
    "40 CFR 60.711 (CFR 2013)",
    "40 CFR 63.101",
    "40 CFR 63.761 (CFR 2013)",
    "40 CFR 63.941 (CFR 2013)",
    "40 CFR 60.741 (CFR 2013)",
    "EPA EV-Built Environments-Devices, Equipment, Appliances",
    "40 CFR 265.1081 (CFR 2013)"
  ],
  "url": "https://mlchart.com/terminology/environment/cover-device/"
}