Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
UNOCAL CORP PARACHUTE CREEK SHALE OIL
10735 COUNTY RD 215, PARACHUTE, CO, 81635
Parent company: UNOCAL CORP
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 | Propylene | Ethylene | Ethylene glycol | Toluene | Ammonia | Total (lbs) |
| 1991 | — | — | 109,105 | 21,719 | 3,954 | 168,644 |
| 1990 | 10,187 | — | 53,800 | 16,196 | 4,525 | 111,680 |
| 1989 | 139,713 | 142,721 | 10,312 | 9,388 | 55,994 | 383,455 |
| 1988 | 188,000 | 81,400 | 24,000 | — | 58,250 | 479,650 |
| 1987 | 89,000 | — | — | 83,750 | — | 194,450 |
▎ 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.