Equilon Enterprises LLC - Shell Oil Products US - Convent Refinery

NPDES permit LA0006041 · Major NON-POTW · effective, expires 2030-06-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file

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

0values over a limit
0required values missing, on 0 form(s)
0of 103 forms filed late

Last period with anything received: 2026-07-31.

Reporting

Reports are due about 15 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (83)

OutfallParameterStatisticLimitMonths
001BOD, 5-day, 20 deg. CMO AVG <= 1994 lb/d all year
001BOD, 5-day, 20 deg. CDAILY MX <= 3591 lb/d all year
001Oxygen demand, chem. [high level] [COD]MO AVG <= 13917 lb/d all year
001Oxygen demand, chem. [high level] [COD]DAILY MX <= 26858 lb/d all year
001pHINST MIN report only all year
001pHINST MAX report only all year
001Solids, total suspendedMO AVG <= 1597 lb/d all year
001Solids, total suspendedDAILY MX <= 2503 lb/d all year
001Oil & GreaseMO AVG <= 581 lb/d all year
001Oil & GreaseDAILY MX <= 1091 lb/d all year
001Nitrogen, total [as N]MO AVG report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]MO AVG <= 1046 lb/d all year
001Nitrogen, ammonia total [as N]DAILY MX <= 2300 lb/d all year
001Phosphorus, total [as P]MO AVG report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Sulfide, total [as S]MO AVG <= 10.1 lb/d all year
001Sulfide, total [as S]DAILY MX <= 22.7 lb/d all year
001Chromium, hexavalent [as Cr]MO AVG <= 1.7 lb/d all year
001Chromium, hexavalent [as Cr]DAILY MX <= 3.8 lb/d all year
001Chromium, total [as Cr]MO AVG <= 20.3 lb/d all year
001Chromium, total [as Cr]DAILY MX <= 54 lb/d all year
001Whole effluent toxicity - retest #148HR MIN report only all year
001Whole effluent toxicity - retest #148HR MIN report only all year
001Whole effluent toxicity - retest #1MO AV MN report only all year
001Whole effluent toxicity - retest #1MO AV MN report only all year
001Whole effluent toxicity - retest #248HR MIN report only all year
001Whole effluent toxicity - retest #248HR MIN report only all year
001Whole effluent toxicity - retest #2MO AV MN report only all year
001Whole effluent toxicity - retest #2MO AV MN report only all year
001Phenolics, total recoverableMO AVG <= 13 lb/d all year
001Phenolics, total recoverableDAILY MX <= 26.8 lb/d all year
001Flow, in conduit or thru treatment plantMO AVG report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Whole Effluent Toxicity - Retest #348HR MIN report only all year
001Whole Effluent Toxicity - Retest #348HR MIN report only all year
001Whole Effluent Toxicity - Retest #3MO AV MN report only all year
001Whole Effluent Toxicity - Retest #3MO AV MN report only all year
001pH range excursions, > 60 minutesMO TOTAL <= 0 occur/mo all year
001pH range excursions, monthly total accumMO TOTAL <= 446 min all year
001Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex48HR MIN report only all year
001Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulexMO AV MN report only all year
001LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas48HR MIN report only all year
001LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelasMO AV MN report only all year
001NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex48HR MIN report only all year
001NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulexMO AV MN report only all year
001NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas48HR MIN report only all year
001NOAEC Lethal Static Renewal 48Hr acute Pimephales promelasMO AV MN report only all year
001Coef Of Var Static Renewal 48Hr Acute D. pulexMAXIMUM report only all year
001Coef Of Var Static Renewal 48Hr Acute Pimephales promelasMAXIMUM report only all year
002TurbidityMO AVG report only all year
002TurbidityDAILY MX report only all year
002pHINST MIN >= 6 SU all year
002pHINST MAX <= 10 SU all year
002Alkalinity, phenolphthaline methodMO AVG report only all year
002Alkalinity, phenolphthaline methodDAILY MX report only all year
002Oil & GreaseDAILY MX <= 15 mg/L all year
002Carbon, tot organic [TOC]DAILY MX <= 35 mg/L all year
002Flow, in conduit or thru treatment plantMO AVG report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
003pHINST MIN report only all year
003pHINST MAX report only all year
003Flow, in conduit or thru treatment plantMO AVG report only all year
003Flow, in conduit or thru treatment plantDAILY MX report only all year
102pHINST MIN >= 6 SU all year
102pHINST MAX <= 9 SU all year
102Solids, total suspendedDAILY MX <= 90 mg/L all year
102Solids, total suspendedDAILY MX <= 90 mg/L all year
102Oil & GreaseDAILY MX <= 15 mg/L all year
102Carbon, tot organic [TOC]DAILY MX <= 50 mg/L all year
102Lead, total [as Pb]DAILY MX <= 50 ug/L all year
102BenzeneDAILY MX <= 50 ug/L all year
102BTEXDAILY MX <= 250 ug/L all year
102Flow, in conduit or thru treatment plantMO AVG report only all year
102Flow, in conduit or thru treatment plantDAILY MX report only all year
CT01Cycles Of ConcentrationMINIMUM report only all year
CT02Cycles Of ConcentrationMINIMUM report only all year
CT03Cycles Of ConcentrationMINIMUM report only all year
CT04Cycles Of ConcentrationMINIMUM report only all year
IT01Flow, in conduit or thru treatment plantMO AVG report only all year
IT01Flow, in conduit or thru treatment plantDAILY MX report only all year
IT02Flow, in conduit or thru treatment plantMO AVG report only all year
IT02Flow, in conduit or thru treatment plantDAILY MX report only 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