Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
SCHLUMBERGER WELL SERVICES
5000 GULF FWY, PO BOX 2175, HOUSTON, TX, 77023
Parent company: SCHLUMBERGER LTD
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 | Freon 113 (CFC-113) | Chromium | Copper | Manganese | Nickel | Total (lbs) |
| 1991 | — | 5 | 5 | 5 | 5 | 20 |
| 1990 | 13,000 | 5 | 5 | 5 | 5 | 13,020 |
| 1989 | 8,150 | — | — | — | — | 8,150 |
▎ 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.