Year-over-year total releases
Reported on-site TRI releases in pounds, grouped by reporting year.
Facility detail
PERMAPOST PRODUCTS INC
4205 SE WITCH HAZEL RD, HILLSBORO, OR, 97123
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 | Arsenic compounds | Chromium compounds (except for chromite ore mined in the Transvaal Region) | Ammonia | Pentachlorophenol | Total |
|---|---|---|---|---|---|
| 2020 | — | — | — | 10 | 10 |
| 1998 | 1,325 | 1,232 | — | — | 2,557 |
| 1996 | — | — | — | 143 | 143 |
| 1990 | — | — | 500 | 500 | 1,000 |
| 1989 | — | — | 500 | — | 500 |