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Pollution Prevention

Pollution Prevention > Toxics Release Inventory > TRI Definitions TRI Definitions

Section 5 Releases

  • Air:
    • Total annual amount of all releases to the air of the TRI reportable toxic chemicals exceeding the reporting threshold-released through stacks, vents, ducts, pipes, fugitive equipment leaks, evaporative losses, releases from building ventilation systems, or any other releases from confined air streams or fugitive emissions.
  • Land:
    • According to TRI reporting requirements, releases to land are the total annual amount of the TRI reportable toxic chemicals exceeding the reporting threshold that are landfilled on-site, used for land treatment or application farming, held in surface impoundment, or released to the land in spills or leaks.
  • Stream:
    • Total annual amount of all releases to each receiving stream or water body of the TRI reportable toxic chemicals exceeding the reporting threshold. Includes process outfalls from pipes and open trenches, releases from on-site wastewater treatment systems, and stormwater runoff.
  • Total Releases:
    • Sum of Air, Stream, Underground Injection, and Land releases annually of the toxic chemical.
  • Underground Injection:
    • Total annual amount of the TRI reportable toxic chemicals exceeding the reporting threshold that are injected into all wells including Class 1 wells at the facility.

Section 8 (Environmental Waste Generation)

  • Energy Recovery Off-site:
    • The total amount of a residual material containing a TRI toxic chemical that is combustible and has a heating value high enough to sustain combustion when used in combustion units integrated into an energy recovery system (i.e., industrial furnaces, industrial kilns, and boilers)off-site. Does not include catastrophic events such as tornados, floods or fires.
  • Energy Recovery On-site:
    • The total amount of a residual material containing a TRI toxic chemical that is combustible and has a heating value high enough to sustain combustion when used in combustion units integrated into an energy recovery system (i.e., industrial furnaces, industrial kilns, and boilers) on-site.
  • Environmental Waste:
    • The sum of Releases and Disposal, Energy Recovery on and off-site, recycling on and off-site, and treatment on and off-site.
  • Full-Time Employee:
    • For the purposes of section 313 reporting, is defined as 2,000 work hours per year. The number of full-time employees is dependent only upon the total number of hours worked by all employees for the facility during the calendar year and not the number of persons working. To determine the number of full-time employees working for your facility, add up the hours worked by all employees during the calendar year, including contract employees and sales and support staff working for the facility.
  • Manufacture:
    • The creation of the molecule, or the importation of the chemical from outside the customs territory of the US and includes chemicals made as byproducts and chemicals made in waste treatment.
  • Otherwise Use:
    • The use of a chemical which is not incorporated into the product.
  • Process:
    • The incorporation of the chemical, or some part of the chemical into a product.
  • Recycling Off-site:
    • The toxic chemical or mixture containing the toxic chemical is recycled off-site.
  • Recycling On-site:
    • The toxic chemical or mixture containing the toxic chemical is recycled on-site.
  • Releases and Disposal:
    • Releases of the toxic chemical including any spilling, leaking, pumping, pouring, emitting, emptying, discharging, injecting, escaping, leaching, dumping, or disposing [on-site or off-site] to the environment (including the abandonment of barrels, container, and other closed receptacles). Does not include toxic chemicals treated on-site or off-site.
  • Treatment Off-site:
    • The toxic chemical or mixture containing the toxic chemical is sent to a POTW (Publically Owned Treatment Works) or other off-site location for waste treatment. The chemical is destroyed in the process.
  • Treatment On-site:
    • The toxic chemical or mixture containing the toxic chemical undergoes on-site waste treatment. The chemical is destroyed in the process.