THE PREMCOR REFINING GROUP, INC.

NPDES permit TX0005991 · Major NON-POTW · administratively continued, expires 2025-02-07 · 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.

This permit expired on 2025-02-07 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

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

7values over a limit
0required values missing, on 0 form(s)
0of 164 forms filed late

Last period with anything received: 2026-07-31. Most often over: Enterococci (4), Solids, total suspended (2), Carbon, tot organic [TOC] (1).

Reporting

Reports are due about 20 days after each monitoring period ends (the most common figure among TX permits in EPA's filings — check your permit).

Limits in force (166)

OutfallParameterStatisticLimitMonths
001BOD, 5-day, 20 deg. CDAILY AV <= 30 mg/L all year
001BOD, 5-day, 20 deg. CDAILY MX <= 45 mg/L all year
001BOD, 5-day, 20 deg. CDAILY AV <= 6977 lb/d all year
001BOD, 5-day, 20 deg. CDAILY MX <= 12392 lb/d all year
001Oxygen demand, chem. [high level] [COD]DAILY AV <= 241 mg/L all year
001Oxygen demand, chem. [high level] [COD]DAILY MX <= 362 mg/L all year
001Oxygen demand, chem. [high level] [COD]DAILY AV <= 45092 lb/d all year
001Oxygen demand, chem. [high level] [COD]DAILY MX <= 88821 lb/d all year
001pHMINIMUM >= 5 SU all year
001pHMAXIMUM <= 11 SU all year
001Solids, total suspendedDAILY AV report only all year
001Solids, total suspendedDAILY MX report only all year
001Oil & GreaseDAILY AV <= 10 mg/L all year
001Oil & GreaseDAILY MX <= 15 mg/L all year
001Oil & GreaseDAILY AV <= 2464 lb/d all year
001Oil & GreaseDAILY MX <= 4548 lb/d all year
001Nitrogen, ammonia total [as N]DAILY AV <= 10 mg/L all year
001Nitrogen, ammonia total [as N]DAILY MX <= 15 mg/L all year
001Nitrogen, ammonia total [as N]DAILY AV <= 1910 lb/d all year
001Nitrogen, ammonia total [as N]DAILY MX <= 4130 lb/d all year
001Cyanide, total [as CN]DAILY AV <= .0042 mg/L all year
001Cyanide, total [as CN]DAILY MX <= .0089 mg/L all year
001Cyanide, total [as CN]DAILY AV <= 1.12 lb/d all year
001Cyanide, total [as CN]DAILY MX <= 2.37 lb/d all year
001Sulfide, total [as S]DAILY AV <= .1 mg/L all year
001Sulfide, total [as S]DAILY MX <= .21 mg/L all year
001Sulfide, total [as S]DAILY AV <= 31.3 lb/d all year
001Sulfide, total [as S]DAILY MX <= 65.8 lb/d all year
001Chromium, hexavalent [as Cr]DAILY AV <= .025 mg/L all year
001Chromium, hexavalent [as Cr]DAILY MX <= .054 mg/L all year
001Chromium, hexavalent [as Cr]DAILY AV <= 7.1 lb/d all year
001Chromium, hexavalent [as Cr]DAILY MX <= 15.4 lb/d all year
001Chromium, total [as Cr]DAILY AV <= .23 mg/L all year
001Chromium, total [as Cr]DAILY MX <= .6 mg/L all year
001Chromium, total [as Cr]DAILY AV <= 62.3 lb/d all year
001Chromium, total [as Cr]DAILY MX <= 172 lb/d all year
001Lead, total [as Pb]DAILY AV <= .087 mg/L all year
001Lead, total [as Pb]DAILY MX <= .19 mg/L all year
001Lead, total [as Pb]DAILY AV <= 22 lb/d all year
001Lead, total [as Pb]DAILY MX <= 47 lb/d all year
001Flow, in conduit or thru treatment plantDAILY AV <= 33 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX <= 55 MGD all year
001Phenolic compounds, totalDAILY AV <= .15 mg/L all year
001Phenolic compounds, totalDAILY MX <= .3 mg/L all year
001Phenolic compounds, totalDAILY AV <= 43.7 lb/d all year
001Phenolic compounds, totalDAILY MX <= 90.3 lb/d all year
001Mercury, total [as Hg]DAILY AV <= .00049 mg/L all year
001Mercury, total [as Hg]DAILY MX <= .001 mg/L all year
001Mercury, total [as Hg]DAILY AV <= .064 lb/d all year
001Mercury, total [as Hg]DAILY MX <= .136 lb/d all year
001pH range excursions, > 60 minutesMO TOTAL <= 0 occur/mo all year
001pH range excursions, monthly total accumMO TOTAL <= 446 min all year
004pHMINIMUM >= 6 SU all year
004pHMAXIMUM <= 9 SU all year
004Oil & GreaseDAILY MX <= 15 mg/L all year
004Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
004Flow, in conduit or thru treatment plantDAILY AV report only all year
004Flow, in conduit or thru treatment plantDAILY MX report only all year
005pHMINIMUM >= 6 SU all year
005pHMINIMUM >= 6 SU all year
005pHMINIMUM >= 6 SU all year
005pHMAXIMUM <= 9 SU all year
005pHMAXIMUM <= 9 SU all year
005pHMAXIMUM <= 9 SU all year
005Oil & GreaseDAILY MX <= 15 mg/L all year
005Oil & GreaseDAILY MX <= 15 mg/L all year
005Oil & GreaseDAILY MX <= 15 mg/L all year
005Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
005Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
005Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
005Flow, in conduit or thru treatment plantDAILY AV report only all year
005Flow, in conduit or thru treatment plantDAILY AV report only all year
005Flow, in conduit or thru treatment plantDAILY AV report only all year
005Flow, in conduit or thru treatment plantDAILY MX report only all year
005Flow, in conduit or thru treatment plantDAILY MX report only all year
005Flow, in conduit or thru treatment plantDAILY MX report only all year
006pHMINIMUM >= 6 SU all year
006pHMAXIMUM <= 9 SU all year
006Oil & GreaseDAILY MX <= 15 mg/L all year
006Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
006Flow, in conduit or thru treatment plantDAILY AV report only all year
006Flow, in conduit or thru treatment plantDAILY MX report only all year
008pHMINIMUM >= 6 SU all year
008pHMAXIMUM <= 9 SU all year
008Oil & GreaseDAILY MX <= 15 mg/L all year
008Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
008Flow, in conduit or thru treatment plantDAILY AV report only all year
008Flow, in conduit or thru treatment plantDAILY MX report only all year
009pHMINIMUM >= 6 SU all year
009pHMAXIMUM <= 9 SU all year
009Solids, total suspendedDAILY MX <= 65 mg/L all year
009Oil & GreaseDAILY MX <= 15 mg/L all year
009Flow, in conduit or thru treatment plantDAILY AV report only all year
009Flow, in conduit or thru treatment plantDAILY MX report only all year
010pHMINIMUM >= 6 SU all year
010pHMAXIMUM <= 9 SU all year
010Oil & GreaseDAILY MX <= 15 mg/L all year
010Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
010Flow, in conduit or thru treatment plantDAILY AV report only all year
010Flow, in conduit or thru treatment plantDAILY MX report only all year
011pHMINIMUM >= 6 SU all year
011pHMAXIMUM <= 9 SU all year
011Oil & GreaseDAILY MX <= 15 mg/L all year
011Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
011Flow, in conduit or thru treatment plantDAILY AV report only all year
011Flow, in conduit or thru treatment plantDAILY MX report only all year
012pHMINIMUM >= 6 SU all year
012pHMAXIMUM <= 9 SU all year
012Oil & GreaseDAILY MX <= 15 mg/L all year
012Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
012Flow, in conduit or thru treatment plantDAILY AV report only all year
012Flow, in conduit or thru treatment plantDAILY MX report only all year
013pHMINIMUM >= 6 SU all year
013pHMAXIMUM <= 9 SU all year
013Oil & GreaseDAILY MX <= 15 mg/L all year
013Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
013Flow, in conduit or thru treatment plantDAILY AV report only all year
013Flow, in conduit or thru treatment plantDAILY MX report only all year
014pHMINIMUM >= 6 SU all year
014pHMAXIMUM <= 9 SU all year
014Oil & GreaseDAILY MX <= 15 mg/L all year
014Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
014Flow, in conduit or thru treatment plantDAILY AV report only all year
014Flow, in conduit or thru treatment plantDAILY MX report only all year
101Solids, total suspendedDAILY AV <= 3789 lb/d all year
101Solids, total suspendedDAILY MX <= 6436 lb/d all year
101Flow, in conduit or thru treatment plantDAILY AV report only all year
101Flow, in conduit or thru treatment plantDAILY MX report only all year
101EnterococciDAILY AV <= 39 CFU/100mL all year
101EnterococciDAILY MX <= 85 CFU/100mL all year
TX1Whole effluent toxicity - retest #17 DA MIN report only all year
TX1Whole effluent toxicity - retest #17 DA MIN report only all year
TX1Whole effluent toxicity - retest #1MO AV MN report only all year
TX1Whole effluent toxicity - retest #1MO AV MN report only all year
TX1Whole effluent toxicity - retest #27 DA MIN report only all year
TX1Whole effluent toxicity - retest #27 DA MIN report only all year
TX1Whole effluent toxicity - retest #2MO AV MN report only all year
TX1Whole effluent toxicity - retest #2MO AV MN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)7 DA MIN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)MO AV MN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia7 DA MIN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidiaMO AV MN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7 DA MIN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)MO AV MN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia7 DA MIN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Menidia menidiaMO AV MN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7 DA MIN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)MO AV MN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia7 DA MIN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidiaMO AV MN report only all year
TX1Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7 DA MIN report only all year
TX1Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)MO AV MN report only all year
TX1Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia7 DA MIN report only all year
TX1Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidiaMO AV MN report only all year
TX1LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7 DA MIN report only all year
TX1LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)MO AV MN report only all year
TX1LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia7 DA MIN report only all year
TX1LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidiaMO AV MN report only all year
TX1LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)7 DA MIN report only all year
TX1LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)MO AV MN report only all year
TX1LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia7 DA MIN report only all year
TX1LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidiaMO AV MN report only all year
TXAWhole effluent toxicity - retest #1SINGSAMP report only all year
TXAWhole effluent toxicity - retest #2SINGSAMP report only all year
TXALC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia)SINGSAMP report only all year
TXALC50 Pass/Fail Static 24Hr Acute Menidia menidiaSINGSAMP 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