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Schlumberger Technology Corporation

Explosives, Rosharon, Texas. NPDES permit TX0078646, in force until May 24, 2029. Last 12 months: over a limit 12 times (last August 2026), 8 required values missing, 2 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 002 form A monthly (8 values), outfall 101 form A monthly (15 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 6 required values missing, 3 of 24 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingOutfallParameterReportedLimitOver by
November 2025002Copper, total [as Cu], daily average.119 mg/L≤ .041 mg/L190%
November 2025002Copper, total [as Cu], daily maximum.195 mg/L≤ .086 mg/L127%
February 2026002Copper, total [as Cu], daily average.107 mg/L≤ .041 mg/L161%
February 2026002Copper, total [as Cu], daily maximum.163 mg/L≤ .086 mg/L90%
March 2026101E. coli, daily maximum> 2420 MPN/100mL≤ 399 MPN/100mL—
May 2026002Copper, total [as Cu], daily average.042 mg/L≤ .041 mg/L2%
June 2026002Copper, total [as Cu], daily average.103 mg/L≤ .041 mg/L151%
June 2026002Copper, total [as Cu], daily maximum.103 mg/L≤ .086 mg/L20%
June 2026002pH, maximum9.14 SU≤ 9 SU—
July 2026002Copper, total [as Cu], daily average.104 mg/L≤ .041 mg/L154%
July 2026002Copper, total [as Cu], daily maximum.191 mg/L≤ .086 mg/L122%
August 2026101E. coli, daily maximum2420 MPN/100mL≤ 399 MPN/100mL507%

Limits in force (23)

ParameterStatisticLimitMonthsOutfall
pHminimum≥ 6 SUall year002
pHmaximum≤ 9 SUall year002
Nitrogen, ammonia total [as N]daily average≤ 4 lb/dall year002
Nitrogen, ammonia total [as N]daily maximum≤ 8 lb/dall year002
Copper, total [as Cu]daily average≤ .041 mg/Lall year002
Copper, total [as Cu]daily maximum≤ .086 mg/Lall year002
Flow, in conduit or thru treatment plantdaily average≤ .0408 MGDall year002
Flow, in conduit or thru treatment plantdaily maximum≤ .1428 MGDall year002
Oxygen, dissolved [DO]monthly minimum≥ 5 mg/Lall year101
BOD, 5-day, 20 deg. Cdaily average≤ 20 mg/Lall year101
BOD, 5-day, 20 deg. Cdaily maximum≤ 45 mg/Lall year101
BOD, 5-day, 20 deg. Cdaily average≤ 5 lb/dall year101
Solids, total suspendeddaily average≤ 20 mg/Lall year101
Solids, total suspendeddaily maximum≤ 45 mg/Lall year101
Solids, total suspendeddaily average≤ 5 lb/dall year101
Nitrogen, ammonia total [as N]daily averagereport only (lb/d)all year101
Nitrogen, ammonia total [as N]daily maximumreport only (lb/d)all year101
Flow, in conduit or thru treatment plantdaily average≤ .03 MGDall year101
Flow, in conduit or thru treatment plantdaily maximum≤ .12 MGDall year101
Chlorine, total residualmonthly minimum≥ 1 mg/Lall year101
Chlorine, total residualmonthly maximum≤ 4 mg/Lall year101
E. colidaily average≤ 126 MPN/100mLall year101
E. colidaily maximum≤ 399 MPN/100mLall year101

How strict are these limits?

Cited limits by parameter: Texas's rules and the federal ones.

Same industry: the 165 Chemicals and Allied Products permits in Texas.

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