Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
SUPERIOR WOOD TREATING
13702 STEWART RD., SUMNER, WA, 98390
Parent company: NA
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 | Chromium compounds (except for chromite ore mined in the Transvaal Region) | Arsenic compounds | Copper compounds | Chromium | Arsenic | Total (lbs) |
| 2022 | — | 0 | — | — | — | 0 |
| 2012 | — | — | 1 | — | — | 1 |
| 2011 | — | — | 1 | — | — | 1 |
| 2010 | 5 | 2 | 15 | — | — | 22 |
| 2009 | 5 | 5 | 250 | — | — | 260 |
| 2008 | 5 | 5 | 250 | — | — | 260 |
| 2003 | 250 | 5 | 5 | — | — | 260 |
| 2002 | 255 | 10 | 10 | — | — | 275 |
| 2001 | 260 | 260 | 15 | — | — | 535 |
| 2000 | 10 | 10 | 10 | — | — | 30 |
| 1997 | 15 | 15 | 15 | — | — | 45 |
| 1996 | — | — | — | 15 | 15 | 45 |
| 1995 | — | — | — | 108 | 27 | 153 |
| 1994 | 10 | 26 | 10 | — | — | 46 |
| 1993 | 10 | 10 | 10 | — | — | 30 |
| 1992 | 10 | 10 | 10 | — | — | 30 |
| 1991 | 10 | 10 | 10 | — | — | 30 |
| 1990 | 255 | 255 | 255 | — | — | 765 |
| 1989 | 250 | 250 | 250 | — | — | 750 |
| 1988 | — | 250 | — | — | — | 250 |
| 1987 | 2 | — | — | — | — | 2 |
▎ 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.