Stack

{
  "id": "MLC-T-ENV-026509",
  "term": "Stack",
  "field": "Environment",
  "definition": "1. A chimney, smokestack, or vertical pipe that discharges used air.\n\n2. A chimney, smokestack, or vertical pipe that discharges pollutants.\n\n3. Any point in a source designed to emit solids, liquids, or gases into the air, including a pipe or duct but not including flares.\n\n4. Structure that includes one or more flues and the housing for the flues.\n\n5. Any chimney, flue, conduit, or duct arranged to conduct emissions to the ambient air.\n\n6. Any point in a source that conducts air pollutants to the atmosphere, including, but not limited to, a chimney, flue, conduit, pipe, vent, or duct, but not including a flare.",
  "subject": "Air",
  "references": [
    "Terms of Environment; Improving Air Quality in Your Community Glossary",
    "Emissions Inventory System Glossary",
    "40 CFR 51.100 (CFR 2013)",
    "40 CFR 72.2 (CFR 2013)",
    "40 CFR 129.2 (CFR 2013)",
    "40 CFR 49.123 (CFR 2013)"
  ],
  "url": "https://mlchart.com/terminology/environment/stack/"
}