Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
NATIONAL TECHNOLOGY INC
130 MARTIN LN, ELK GROVE VILLAGE, IL, 60007
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) | Copper compounds | Total (lbs) | ||
| 1993 | — | 500 | 250 | 750 | ||
| 1992 | 1,750 | 500 | 250 | 2,500 | ||
| 1991 | 1,550 | 500 | 250 | 2,300 | ||
| 1990 | 500 | 255 | — | 755 | ||
| 1989 | 500 | 500 | — | 1,000 | ||
▎ 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.