Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
CONOCOPHILLIPS SANTA MARIA FACILITY CARBON PLANT
2565 WILLOW RD, ARROYO GRANDE, CA, 93420
Parent company: CONOCOPHILLIPS CO
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 | Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | Propylene | Ethylene | Ammonia | Total (lbs) |
| 2007 | 4,500 | 13,000 | 4,163 | 546 | 1,500 | 23,771 |
| 2006 | 18,000 | 52,000 | 16,110 | 2,144 | 5,700 | 94,182 |
| 2005 | 25,300 | 44,710 | 25,800 | 3,270 | — | 99,418 |
| 2004 | 30,100 | 53,320 | 30,700 | 3,860 | — | 118,343 |
| 2003 | 25,300 | 11,000 | 27,600 | 3,460 | — | 68,241 |
| 2002 | 10,800 | 34,100 | 31,200 | 3,960 | — | 80,875 |
| 2001 | 22,000 | 19,920 | 28,080 | 3,570 | — | 74,107 |
| 2000 | 19,500 | 35,560 | 28,320 | 3,590 | — | 87,876 |
| 1999 | 15,600 | 33,500 | 30,910 | 3,950 | — | 83,960 |
| 1998 | 34,700 | 13,250 | 32,310 | 4,130 | — | 84,390 |
| 1997 | 32,870 | 13,430 | 35,260 | 4,520 | — | 86,080 |
| 1996 | 149,900 | — | 5,370 | 1,470 | — | 156,740 |
| 1995 | 129,475 | — | 4,975 | 1,365 | — | 135,815 |
| 1994 | 120,000 | — | 3,700 | 1,000 | — | 124,705 |
| 1993 | 130,000 | — | 2,800 | 750 | — | 133,555 |
| 1992 | 140,000 | — | 250 | 250 | — | 140,505 |
| 1991 | 120,000 | — | 750 | 250 | — | 121,005 |
| 1990 | 120,000 | — | 1,800 | 750 | — | 122,555 |
| 1989 | 150,000 | — | 2,200 | 750 | — | 152,950 |
| 1988 | — | — | — | 750 | — | 750 |
▎ 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.