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Column Name: POTW_PERCENTAGE_TO_81D_2
Description: The POTW Percentage to 81D is an optional percentage that a facility can provide to better indicate the amount of a transfer to a Publicly Owned Treatment Works (POTW) that is released at the POTW (off-site relative to the reporting facility) to other media besides Class I Underground Injection Wells, RCRA Subtitle C landfills, and/or other landfills.
To better estimate the percentages of a chemical that is managed at a POTW, default percentages for removal and destruction rates (which are based on based on experimental and estimated data) for toxic chemicals are provided by default to regulated facilities. These percentages for each toxic chemical are automatically pre-loaded into the TRI reporting application, TRI-MEweb, to assist with Section 8 or Total Production Waste calculations. Three percentages are preloaded. They indicate the percentage of the POTW transfer that is expected to be released or treated at the POTW. For these percentages, see Default Percentage to 81c, Default Percentage to 81d and Default Percentage to 8.7.
If a facility has better information on the final disposition of the chemical readily available they can override the default percentages. The POTW Percentage to 81C represents an optional percentage the facility has reported that overrides or replaces the default percentage that was been provided in the TRI reporting application, TRI-MEweb. It indicates the percentage of the transfer that will be released off-site (from the reporting facility) at the POTW by by means other than Class I Underground Injection Wells, RCRA Subtitle C landfills, and/or other landfills.
As an example of how this data element is used, suppose a facility reported a 200 lb transfer of a chemical to a POTW and optionally provided the following release and treatment percentages:
Percentage to 81C = 15%
Percentage to 81D = 35%
Percentage to 87 = 50%
The percentages above would be used to calculate the amount of the transfer that would ultimately be treated or released at the POTW. In the case of the example, 30 lbs (200 X .15 =) would be released to Class I Underground Injection Wells, RCRA Subtitle C landfills and/or other landfills. This amount would be part of the total entered into Part II, Section 8.1c - Total off-site disposal to Class I Underground Injection Wells, RCRA Subtitle C landfills, and other landfills. 70 lbs (200 X .35) would be released at the POTW to other media. This amount would be part of the total for 8.1d - Total other off-site disposal or other releases. And, 100 lbs (200 X .5) of the chemical would be treated at the POTW. This amount would be part of the total calculation for 8.7 - Quantity treated off-site. This data element was introduced in reporting year 2014.
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Properties:
- Type:NUMBER
- Length:5,2
Definition Source:TRI Data Dictionary