Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
OPTEK TECHNOLOGIES INC
1215 W CROSBY RD, CARROLLTON, TX, 75006
Parent company: DYSON-KISSNER-MORAN CORP
Carcinogen
— EPA classifications across all reporting years
Top chemical totals
The 10 chemicals with the highest cumulative on-site releases in pounds (lbs) 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.
| All values in pounds (lbs) | ||||||
|---|---|---|---|---|---|---|
| Year | Tetrachloroethylene | Freon 113 (CFC-113) | Ammonia | Acetone | Nitric acid | Total (lbs) |
| 2002 | — | — | 250 | — | — | 500 |
| 2001 | — | — | 250 | — | — | 500 |
| 2000 | — | — | 775 | — | — | 775 |
| 1999 | — | — | 775 | — | — | 775 |
| 1998 | — | — | 775 | — | — | 775 |
| 1997 | — | — | 545 | — | — | 545 |
| 1996 | — | — | 545 | — | — | 545 |
| 1995 | — | — | 1,000 | — | — | 1,000 |
| 1994 | — | — | 1,000 | — | 1,000 | 2,000 |
| 1993 | — | — | 1,000 | — | — | 2,000 |
| 1992 | — | — | 500 | — | 1,000 | 2,500 |
| 1991 | 8,981 | 9,600 | 1,000 | — | 500 | 20,081 |
| 1990 | 10,980 | — | 250 | — | — | 11,230 |
| 1989 | 2,250 | 9,450 | — | 1,750 | 500 | 17,790 |
| 1988 | 1,482 | 1,883 | — | — | — | 3,365 |
| 1987 | — | — | — | 1,650 | — | 1,650 |
▎ Facilities report to EPA's TRI once they manufacture, process, or use a listed chemical above set thresholds. Once that threshold is crossed, they must report actual releases regardless of size — so a small number reflects genuine low-level discharge, not a data error.