SCHLUMBERGER TECHNOLOGY CORPORATION

NPDES permit TX0078646 · Minor NON-POTW · effective, expires 2029-05-24 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

EPA's record, 2025-09-01 to 2026-08-31

11values over a limit
8required values missing, on 1 form(s)
1of 22 forms filed late

Last period with anything received: 2026-07-31. Most often over: Copper, total [as Cu] (9), E. coli (1), pH (1).

Reporting

Reports are due about 20 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (23)

OutfallParameterStatisticLimitMonths
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Nitrogen, ammonia total [as N]DAILY AV <= 4 lb/d all year
002Nitrogen, ammonia total [as N]DAILY MX <= 8 lb/d all year
002Copper, total [as Cu]DAILY AV <= .041 mg/L all year
002Copper, total [as Cu]DAILY MX <= .086 mg/L all year
002Flow, in conduit or thru treatment plantDAILY AV <= .0408 MGD all year
002Flow, in conduit or thru treatment plantDAILY MX <= .1428 MGD all year
101Oxygen, dissolved [DO]MO MIN >= 5 mg/L all year
101BOD, 5-day, 20 deg. CDAILY AV <= 20 mg/L all year
101BOD, 5-day, 20 deg. CDAILY MX <= 45 mg/L all year
101BOD, 5-day, 20 deg. CDAILY AV <= 5 lb/d all year
101Solids, total suspendedDAILY AV <= 20 mg/L all year
101Solids, total suspendedDAILY MX <= 45 mg/L all year
101Solids, total suspendedDAILY AV <= 5 lb/d all year
101Nitrogen, ammonia total [as N]DAILY AV report only all year
101Nitrogen, ammonia total [as N]DAILY MX report only all year
101Flow, in conduit or thru treatment plantDAILY AV <= .03 MGD all year
101Flow, in conduit or thru treatment plantDAILY MX <= .12 MGD all year
101Chlorine, total residualMO MIN >= 1 mg/L all year
101Chlorine, total residualMO MAX <= 4 mg/L all year
101E. coliDAILY AV <= 126 MPN/100mL all year
101E. coliDAILY MX <= 399 MPN/100mL all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states