Year-over-year total releases
Reported on-site TRI releases in pounds, grouped by reporting year.
Facility detail
BIG FOUR FOUNDRIES CORP
6630 S 57TH W AVE, TULSA, OK, 74131
Parent company: NA
Carcinogen
— EPA classifications across all reporting years
Top chemical totals
The 10 chemicals with the highest cumulative on-site releases across all available years.
Full release table
Rows are years. Columns show the five highest-total chemicals across all years plus each year's total release volume.
| Year | Chromium compounds (except for chromite ore mined in the Transvaal Region) | Phenol | Manganese | 4,4'-Methylenedi(phenyl isocyanate) | Nickel | Total |
|---|---|---|---|---|---|---|
| 1998 | — | — | 136 | — | — | 136 |
| 1997 | — | — | 161 | — | — | 161 |
| 1996 | — | — | 147 | — | — | 147 |
| 1995 | — | — | 250 | — | — | 250 |
| 1994 | — | 750 | 167 | 41 | 250 | 1,213 |
| 1993 | — | — | 144 | 40 | — | 184 |
| 1992 | — | — | 144 | 46 | — | 190 |
| 1991 | 327,468 | — | 171 | 49 | 2 | 327,690 |
| 1990 | — | 10,940 | — | 30 | — | 10,970 |
| 1989 | — | 10,175 | — | 32 | — | 10,207 |
| 1988 | — | — | — | 25 | — | 25 |