Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
TRI-STAR TECHNOLOGY CO INC
126 MERRIMACK ST, METHUEN, MA, 018446116
Parent company: NA
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 | Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | Nitric acid | Sodium hydroxide (solution) | Copper compounds | Total (lbs) |
| 1997 | — | — | 64 | — | 21 | 85 |
| 1996 | — | — | 56 | — | 16 | 72 |
| 1995 | — | — | — | — | 2 | 2 |
| 1994 | 375 | 47 | — | — | 2 | 424 |
| 1993 | 242 | 104 | — | — | 2 | 348 |
| 1992 | 230 | 104 | — | — | 1 | 335 |
| 1991 | 189 | 103 | — | — | 1 | 293 |
| 1990 | 191 | 102 | — | — | 1 | 294 |
| 1989 | 245 | 46 | — | — | — | 292 |
| 1988 | 248 | — | — | 105 | — | 354 |
| 1987 | — | 16 | — | — | — | 39 |
▎ 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.