Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
GEOPHYSICAL RESEARCH CORP
6540 EAST APACHE ST, TULSA, OK, 74115
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 | Trichloroethylene | 1,1,1-Trichloroethane | Total (lbs) | |||
| 2000 | 5,368 | — | 5,368 | |||
| 1998 | 6,710 | — | 6,710 | |||
| 1997 | 10,065 | — | 10,065 | |||
| 1995 | 10,737 | — | 10,737 | |||
| 1994 | 10,737 | — | 10,737 | |||
| 1993 | 14,100 | — | 14,100 | |||
| 1991 | — | 15,800 | 15,800 | |||
| 1990 | — | 9,185 | 9,185 | |||
| 1989 | — | 7,300 | 7,300 | |||
| 1988 | — | 6,413 | 6,413 | |||
▎ 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.