Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
NATIONAL SEMICONDUCTOR CORP, MIL/AERO GROUP
5901 S CALLE SANTA CRUZ, TUCSON, AZ, 857063999
Parent company: NATIONAL SEMICONDUCTOR CORP
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 | Freon 113 (CFC-113) | Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | Nitric acid | Sodium hydroxide (solution) | Total (lbs) | |
| 1991 | — | 500 | — | — | 500 | |
| 1990 | 9,210 | 500 | 500 | — | 10,210 | |
| 1989 | 19,159 | 500 | 500 | — | 20,159 | |
| 1988 | — | 500 | 500 | 500 | 1,500 | |
| 1987 | 22,002 | — | — | — | 22,002 | |
▎ 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.