Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
HERCULES INC RESEARCH CENTER
500 HERCULES RD, WILMINGTON, DE, 198081599
Parent company: HERCULES INC
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 | Toluene | Methyl ethyl ketone | 1,2-Dichloropropane | Total (lbs) | ||
| 1998 | 204 | 83 | — | 287 | ||
| 1997 | 213 | 206 | 7 | 426 | ||
| 1996 | 87 | 144 | — | 231 | ||
| 1995 | 700 | — | — | 700 | ||
| 1994 | 1,584 | — | — | 1,584 | ||
| 1993 | 671 | — | — | 671 | ||
| 1992 | 1,764 | — | — | 1,764 | ||
| 1991 | 1,220 | — | — | 1,220 | ||
| 1990 | 789 | 184 | — | 973 | ||
| 1989 | 2,586 | 512 | — | 3,098 | ||
| 1988 | 3,873 | 500 | — | 4,373 | ||
▎ 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.