SOLID AND HAZARDOUS WASTE APPENDIX

SOLID AND HAZARDOUS WASTE APPENDIX

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SOLID AND HAZARDOUS WASTE APPENDIX

The Toxics Release Inventory (TRI) provides state 

reports about releases and transfers of chemicals and 

compounds. Each report contains overall state 

information regarding releases and transfers, a list of 

the top five chemicals released or transferred, offsite, in that state, and a list of the top ten facilities 

that released or transferred, off-site, the greatest 

amount of chemicals. All chemical and facility 

information was taken directly from the Envirofacts 

TRI database maintained by the U.S. Environmental 

Protection Agency (EPA). 

TRI State Report 

Descriptions

This is a brief description of the TRI State Reports. A 

brief explanation of each column heading is given. 

State Information

This is general TRI information relating to the state. 

• Total Facilities—The total facilities reporting in 

that state. 

• Total Forms—The total number of forms 

submitted. Each form has a unique Document 

Control Number.

• Total Forms A’s—The total number of short 

forms submitted. 

• Transfer into State—The total amount of waste 

chemicals (in pounds) transferred into the state. 

• Transfer out of State—The total amount of waste 

chemicals (in pounds) transferred out of the 

state. 

• Population—The population of a state as 

reported by the U.S. Census Bureau for 1990. 

Reported Releases and Waste 

Management Activities

On-Site Releases

The amount of chemicals released as reported by 

facilities in that state. 

• Air Emissions—Total on-site releases of a 

particular type in pounds where the 

environmental medium = ‘AIR’. 

• Surface Water Discharges—Total on-site 

releases of a particular type in pounds where the 

environmental medium = ‘WATER’. 

• Underground Injection—Total on-site releases of 

a particular type in pounds where the 

environmental medium = ‘UNINJ I’ or ‘UNINJ 

IIV’. 

− Class I Wells—Total on-site releases of a 

particular type in pounds where the 

environmental medium = ‘UNINJ I’. 

− Class II-V Wells—Total on-site releases of a 

particular type in pounds where the 

environmental medium = ‘UNINJ IIV’. 

• Releases to Land—Total on-site releases of a 

particular type in pounds where the 

environmental medium = ‘RCRA C’ or ‘OTH 

LANDF’. 

− RCRA Subtitle C Landfills—Total on-site 

releases of a particular type in pounds where 

the environmental medium = ‘RCRA C’. 

− Other On-Site Land Releases—Total on-site 

releases of a particular type in pounds where 

the environmental medium = ‘OTH 

LANDF’. 

• Total On-Site Releases—The sum of Air Emissions, 

Surfaces Water Discharges, Underground Injection, 

and Releases to Land. 

• Transfer Off-Site to Disposal—Total off-site 

transfer of a particular type in pounds for 

disposal. 

• Total On and Off-Site Releases—Sum of total 

on-site releases and off-site transfers. 

Off-Site Releases (Transfers Off-Site 

to Disposal) 

• POTWs (metals and metal compounds)—Total 

transfer of metals and metal compounds in 

pounds to POTWs as offsite releases. 
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• Transfer Off-Site to Disposal—Total off-site 

transfer of a particular type in pounds for 

disposal. 

• Total Off-Site Releases—Sum of total POTW’s 

(metals and metal compounds) and off-site 

transfers to disposals. 

• Total Releases—Sum of total on-site and off-site 

releases. 

Source Reduction Activities

• Energy Recovery On-Site—The total amount of 

the toxic chemical in waste burned for energy 

recovery onsite, reported in section 8.2 of Form 

R. 

• Energy Recovery Off-Site—The total amount of 

the toxic chemical in waste sent offsite to be 

burned for energy recovery, reported in section 

8.3 of Form R. 

• Recycling On-Site—The total amount of the 

toxic chemical recycled onsite, reported in 

section 8.4 of Form R. 

• Recycling Off-Site—The total amount of the 

toxic chemical sent offsite for recycling, reported 

in section 8.5 of Form R. 

• Treatment On-Site—The total amount of the 

toxic chemical treated onsite, reported in section 

8.6 of Form R. 

• Treatment Off-Site—The total amount of the 

toxic chemical treated offsite, reported in section 

8.7 of Form R. 

• Total Releases—The total amount of the toxic 

chemical released due to production related 

events by the facility to all environmental media 

both on and off site, reported in section 8.1 of 

Form R. 

• Total Production Related Waste Managed—The 

sum of recycling, energy recovery, treatment, 

and total releases. 

Transfers Off-Site to POTW’s 

• Metals and Metal Compounds—Total transfer of 

metals and metals compounds in pounds to 

POTW’s as an off-site releases. 

• Non-Metal TRI Chemicals—Total off-site 

transfer of non-metals in pounds to a POTW’s as 

an off-site release. 

• Total Transfers Off-site to POTW’s—Sum of 

total off-site transfers of Metals and Non-Metals 

to POTW’s. 

Top Ten Chemicals for 

Air/Water/Land/Underground 

Injection Releases and the Top Ten 

Chemicals for Total On and Off-Site 

Releases

The waste chemicals that are most released into the 

environment for that state.

• Chemical—The name of the chemical. 

• Air Emissions—Total on-site releases of a 

particular type in pounds where the 

environmental medium = ‘AIR’. 

• Surface Water Discharges—Total on-site 

releases of a particular type in pounds where the 

environmental medium = ‘WATER’. 

• Underground Injection—Total on-site releases of 

a particular type in pounds where the 

environmental medium = ‘UNINJ I’ or ‘UNINJ 

IIV’. 

− Class I Wells—Total on-site releases of a 

particular type in pounds where the 

environmental medium = ‘UNINJ I’. 

− Class II-V Wells—Total on-site releases of a 

particular type in pounds where the 

environmental medium = ‘UNINJ IIV’. 

• Releases to Lands—Total on-site releases of a 

particular type in pounds where the 

environmental medium = ‘RCRA C’ or ‘OTH 

LANDF’. 

− RCRA Subtitle C Landfills—Total on-site 

releases of a particular type in pounds where 

the environmental medium = ‘RCRA C’. 

− Other On-Site Land Release—Total on-site 

releases of a particular type in pounds where 

the environmental medium = ‘OTH 

LANDF’. 

• Total On-site Releases—The sum of Air 

Emissions, Surfaces Water Discharges, 

Underground Injection, and Releases to Land. 
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• Transfers Off-Site to Disposal—Total off-site 

transfer of a particular type in pounds for 

disposal. 

• Total On and Off-site Releases—Sum of total 

on-site releases and off-site transfers. 

Top Ten Facilities for 

Air/Water/Land/Underground 

Injection Releases and the Top Ten 

Facilities for Total On and Off-site 

Release

The facilities that release the most waste chemicals 

into the environment for that state. 

• Facility—The name of the facility. 

• City, County—The city name and the county 

name where the facility is located. 

• Air Emissions—Total on-site releases in pounds 

by a facility where the environmental medium = 

‘AIR’. 

• Surface Water Discharge—Total on-site releases 

in pounds by a facility where the environmental 

medium = ‘WATER’.

• Underground Injection—Total on-site releases in 

pounds by a facility where the environmental 

medium = ‘UNINJ I’ or ‘UNINJ IIV’. 

− Class I Wells—Total on-site releases in 

pounds by a facility where the 

environmental medium = ‘UNINJ I’. 

− Class II-V Wells—Total on-site releases in 

pounds by a facility where the 

environmental medium = ‘UNINJ IIV’. 

• Releases to Land—Total on-site releases in 

pounds by a facility where the environmental 

medium = ‘RCRA C’ or ‘OTH LANDF’. 

− RCRA Subtitle C Landfills—Total on-site 

releases in pounds by a facility where the 

environmental medium = ‘RCRA C’. 

− Other On-Site Land Releases—Total on-site 

releases in pounds by a facility where the 

environmental medium = ‘OTH LANDF’. 

• Total On-site Releases—The sum of Air 

Emissions, Surfaces Water Discharges, 

Underground Injection, and Releases to Land by 

a facility. 

• Transfers Off-Site to Disposal—Total off-site 

transfer in pounds for disposal by a facility.

• Total On and Off-site Releases—Sum of total 

on-site releases and off-site transfers by a 

facility. 

The following table contains the EPA’s Toxics

Release Inventory information for Montana for the 

year 2001 (2001 is the latest year for which a 

published report is available). More recent 

information up to year 2003 is available from EPA’s 

website at: http://www.epa.gov/triexplorer/.
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