Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
SEM PRODS INC
120 SEM LN, BELMONT, CA, 940021165
Parent company: NA
Carcinogen
— EPA classifications across all reporting years
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 | Toluene | Methyl ethyl ketone | Dichloromethane | Phosphoric acid | Total (lbs) | |
| 1992 | 3,550 | 1,500 | 1,500 | 255 | 6,805 | |
| 1991 | 1,000 | 755 | 255 | 255 | 2,265 | |
| 1990 | 1,328 | 255 | 255 | 255 | 2,093 | |
| 1989 | 1,270 | 302 | 42 | 80 | 1,694 | |
| 1988 | 1,160 | — | — | — | 1,160 | |
▎ 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.