Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
AMOCO OIL CO, CASPER REFINERY
1707 W YELLOWSTONE HWY, CASPER, WY, 82602
Parent company: AMOCO CORP
Carcinogen
PBT
— 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 | 1,2,4-Trimethylbenzene | Xylene (mixed isomers) | Methyl tert-butyl ether | Propylene | Total (lbs) |
| 1991 | 109,600 | 17,580 | 58,922 | 71,700 | 25,000 | 338,995 |
| 1990 | 133,000 | 26,460 | 69,200 | 62,000 | 24,000 | 402,954 |
| 1989 | 169,000 | 26,650 | 81,750 | 31,100 | 27,000 | 464,773 |
| 1988 | 310,000 | 89,247 | — | 27,500 | — | 524,053 |
| 1987 | 464,500 | 115,200 | — | — | 90,000 | 782,150 |
▎ 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.