Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
SIGMA CIRCUITS INC SOUTHERN CALIFORNIA DIV
2970 AIRWAY AVE, COSTA MESA, CA, 92626
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 | Certain glycol ethers | Copper compounds | Total (lbs) |
| 1996 | — | — | — | — | 24 | 24 |
| 1995 | 478 | — | 96 | — | 16 | 590 |
| 1994 | 442 | 96 | 45 | — | 11 | 594 |
| 1993 | 3,715 | 2,170 | 437 | 135 | 3 | 6,460 |
| 1992 | 3,003 | 2,224 | 993 | 107 | 2 | 6,329 |
| 1991 | 250 | 5 | — | — | — | 255 |
| 1990 | 250 | 5 | 5 | — | — | 265 |
| 1989 | 250 | 250 | 250 | — | — | 750 |
| 1988 | — | 250 | 250 | — | — | 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.