Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
INTERMOUNTAIN REFINING CO INC
1346 N HWY 89A, FREDONIA, AZ, 86022
Parent company: UNICO INC
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 | Benzene | Toluene | Xylene (mixed isomers) | Styrene | Naphthalene | Total (lbs) |
| 1992 | 17,200 | 8,100 | 2,700 | 1,800 | 1,800 | 31,600 |
| 1991 | 14,800 | 7,200 | 2,300 | 1,500 | 1,500 | 27,300 |
| 1990 | 14,200 | 5,700 | 1,840 | 840 | 820 | 23,400 |
▎ 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.