| CRITERIA | DESCRIPTION |
| Total Wastes | Total production-related waste prior to treatment, recycling or control. Determined by adding the quantities reported in question 8 of the TRI for the "current year." |
| Total Releases | Quantity of total releases as reported on TRI. |
| Air Releases | Quantity of total air releases as reported on TRI. This is the sum of the point and non-point source air emissions reported on TRI. |
| Water Releases | Water releases as reported on TRI. |
| Land Releases | On-site land disposal as reported on TRI. |
| Chlorinated Burned | Quantity of chlorinated compounds that are sent to incinerators. These data were provided by Dow. |
| Air Carcinogens-Pounds | Quantity of total air releases (point and non-point as reported on TRI) of chemicals considered to be carcinogens (listed in the USEPA Health Effects Assessment Summary Tables, (HEAST) Table B: Carcinogenicity) |
| Air Carcinogens-Weighted | To get a general indicator of potential relative risk from different chemicals, a weight factor was calculated as the product of the total air releases (point and non-point reported on TRI) times the Unit Risk Factor as reported in the Health Effects Assessment Summary Tables (HEAST) and Integrated Risk Information System (IRIS). |
| Air Non-carcinogens-Pounds | Quantity of total air releases (point and non-point as reported on TRI) of chemicals considered toxic but not carcinogens. |
| Air Non-carcinogens weighted | To get a general indicator of potential risk from different chemicals, a weight factor was calculated by dividing the total air releases (point and non-point reported on TRI) by the Reference Concentrations reported in the Health Effects Assessment Summary Tables and the Integrated Risk Information System. |
| Water Quality Criteria-Pounds | To get a general indicator of potential relative water quality impacts from specific chemicals, a weight factor was calculated by dividing the release quantities by the water quality criteria reported as a concentration. |
| Persistence/bioaccumulation | To get a general indicator of the persistence and bioaccumulation effects of specific chemicals, a qualitative ranking was developed using the Hazard Ranking System for Superfund sites. The ranking is based on a High, Medium, low, very low system derived from a numerical HRS score. |
| Persistent Toxics-MVMA | This category is based on the list of chemicals in an agreement between Michigan DEQ and the Motor Vehicle Manufacturers Association (MVMA) for Criteria and List of Persistent Toxic Substances. A "yes" indicates that the chemical is on the list. |
| Risk Planning Acute Air | This category is based on the chemicals listed in section 112(r) of the CAA that may require risk management planning due to acute toxicity. The total pounds of wastes generated was used as an indicator of the potential quantities of substances at the facility. |
| Risk Planning Flammability | This category is based on the chemicals listed in section 112(r) of the CAA that may require risk management planning due to flammability. The total pounds of wastes generated was used as an indicator of the potential quantities of substances at the facility. |
| Increased Releases | Increases in total releases of specific chemicals were calculated between 1991 and 1995. |
| Increase Waste Generation | Increases in total waste generation of specific chemicals were calculated between 1991 and 1995. |
| Waste/production Increases | Changes in total waste generation between 1991 and 1994 were indexed to production using the Production Index reported in Section 8 of the TRI. |
| Endocrine Disrupters | Total releases of chemicals considered to be endocrine disrupters, according to a list developed by Theo Colburn. |
| PRIORITY CHEMICAL | ENVIRONMENTAL IMPACT OF CONCERN | RANK |
| Acrylonitrile | Release of water Quality Criteria compound-weighted
Risk Planning (112r)-Acute
Release of Air Carcinogen-risk weighted | 1
1
2 |
| Aliphatic Process Tar, BCl-1 | Burning of Chlorinated Compounds (dioxin formation) | 4 |
| Butadiene | Release of Air Carcinogen-risk weighted
Risk Planning(112r) Flammability | 1
2 |
| Chlorine | Increase in Releases
Risk Planning (112r)-Acute | 2
4 |
| Chloroethane | Total Release
Release of air non-carcinogen | 2
2 |
| Chloromethane | Burning of Chlorinated Compounds (dioxin formation)
Increase in waste/unit of product
Increase in total waste generation
Risk Planning (112r)-Acute
Total waste in 1995 | 3
3
4
6
7 |
| Cyclic process tar, BCl-2 | Burning of Chlorinated Compounds (dioxin formation) | 3 |
| Dichlorophenol (2,4) | Water Quality Criteria
Burning of Chlorinated Compounds (dioxin formation) | 5
8 |
| Ethylbenzene | Release of air non-carcinogen | 3 |
| Finished Product BCl-1 | Burning of Chlorinated Compounds (dioxin formation) | New |
| Finished Product BCl-4 | Burning of Chlorinated Compounds (dioxin formation) | New |
| HCl-priority | Total waste in 1995
Burning of Chlorinated Compounds (dioxin formation)
Release of air non-carcinogen
Risk Planning (112r)-Acute | 1
1
2
3 |
| Intermediate BCl-4 | Burning of Chlorinated Compounds (dioxin formation) | New |
| 24D | Release of Endocrine Disrupters
Water Releases | 2
7 |
| Dichloroethane (1,2) | Water Releases-weighted
Increase in releases | 2
7 |
| Chromium | Release to land | 1 |
| Formaldehyde | Increase in Releases
Release of Air Carcinogen
Water release of criteria compound
Total Release
Persistence ranking | 1
1
1
4
High |
| Methylene Chloride | Water release of criteria compound
Burning of Chlorinated Compounds (dioxin formation)
Release of Air Carcinogen
Persistence ranking | 2
7
8
High |
| Phosgene | Burning of Chlorinated Compounds (dioxin formation)
| 6 |
| Styrene | Release of Endocrine Disrupters
Release of air non-carcinogen
Total waste in 1995
Increase in waste/unit of product
Total release in 1995
Increase in Releases | 1
2
4
5
5
6 |
| Tetrachloroethylene | Release of air non-carcinogen
Burning of Chlorinated Compounds (dioxin formation)
Water release of criteria compound
Persistence ranking | 3
4
5
High |
| Tetrachloroethane (1,1,1,2) | Burning of Chlorinated Compounds (dioxin formation) | New |
| Toluene | Total release in 1995
Release of air-non carcinogen | 1
1 |
| Trichlorophenol (2,4,6) | Burning of Chlorinated Compounds (dioxin formation)
Water Release weighted
Increase in waste/unit of product
Total waste
Persistence ranking | 2
3
4
5
High |
| Vinyl Chloride | Risk Planning(112r) Flammability
Release of Air Carcinogen-risk weighted | 3
4 |
| Vinylidene Chloride | Risk Planning(112r) Flammability
Release of Air Carcinogen-risk weighted
Burning of Chlorinated Compounds (dioxin formation) | 1
3
5 |
