Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
WESTAK NORTH
14815 NE 40TH ST, REDMOND, WA, 98052
Parent company: WESTAK INC
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 | Ammonia | Nitric acid | Copper | Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | Total (lbs) | |
| 1994 | 2,250 | — | — | 10 | 2,260 | |
| 1993 | 2,250 | 255 | — | 10 | 2,515 | |
| 1992 | 2,250 | 255 | — | 10 | 2,515 | |
| 1991 | 2,250 | 255 | — | 10 | 2,515 | |
| 1990 | 2,250 | 255 | — | 10 | 2,515 | |
| 1989 | — | 500 | — | — | 500 | |
| 1988 | 500 | 500 | 250 | — | 1,250 | |
| 1987 | — | 500 | — | — | 500 | |
▎ 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.