INV PROPYLENE LLC

NPDES permit TX0006068 · Major NON-POTW · effective, expires 2028-06-23 · 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

7values over a limit
0required values missing, on 0 form(s)
0of 40 forms filed late

Last period with anything received: 2026-07-31. Most often over: Benzene (2), Copper, total [as Cu] (2), Cyanide, free [as free] (2).

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 (230)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitDAILY AV <= 105 deg F all year
001Temperature, water deg. fahrenheitDAILY MX <= 110 deg F all year
001BOD, 5-day, 20 deg. CDAILY AV <= 274 lb/d all year
001BOD, 5-day, 20 deg. CDAILY MX <= 548 lb/d all year
001Oxygen demand, chem. [high level] [COD]DAILY AV <= 1878 lb/d all year
001Oxygen demand, chem. [high level] [COD]DAILY MX <= 2817 lb/d all year
001pHMINIMUM >= 5 SU all year
001pHMAXIMUM <= 11 SU all year
001Solids, total suspendedDAILY AV <= 432 lb/d all year
001Solids, total suspendedDAILY MX <= 1300 lb/d all year
001Oil & GreaseDAILY AV <= 144 lb/d all year
001Oil & GreaseDAILY MX <= 216 lb/d all year
001Cyanide, free [as free]DAILY AV <= .083 lb/d all year
001Cyanide, free [as free]DAILY MX <= .18 lb/d all year
001Copper, total [as Cu]DAILY AV <= .13 lb/d all year
001Copper, total [as Cu]DAILY MX <= .28 lb/d all year
001Aluminum, total [as Al]DAILY MX report only all year
001Carbon tetrachlorideDAILY AV <= .81 lb/d all year
001Carbon tetrachlorideDAILY MX <= 2.18 lb/d all year
0011,2-DichloroethaneDAILY AV <= 1.03 lb/d all year
0011,2-DichloroethaneDAILY MX <= 3.29 lb/d all year
001ChloroformDAILY AV <= .64 lb/d all year
001ChloroformDAILY MX <= 1.86 lb/d all year
001TolueneDAILY AV <= .16 lb/d all year
001TolueneDAILY MX <= .42 lb/d all year
001BenzeneDAILY AV <= .33 lb/d all year
001BenzeneDAILY MX <= .77 lb/d all year
001AcenaphthyleneDAILY AV <= .11 lb/d all year
001AcenaphthyleneDAILY MX <= .27 lb/d all year
001AcenaphtheneDAILY AV <= .11 lb/d all year
001AcenaphtheneDAILY MX <= .27 lb/d all year
001AcrylonitrileDAILY AV <= .54 lb/d all year
001AcrylonitrileDAILY MX <= 1.33 lb/d all year
001AnthraceneDAILY AV <= .11 lb/d all year
001AnthraceneDAILY MX <= .27 lb/d all year
001Benzo[k]fluorantheneDAILY AV <= .11 lb/d all year
001Benzo[k]fluorantheneDAILY MX <= .27 lb/d all year
001Benzo[a]pyreneDAILY AV <= .00021 lb/d all year
001Benzo[a]pyreneDAILY MX <= .00045 lb/d all year
001ChlorobenzeneDAILY AV <= .81 lb/d all year
001ChlorobenzeneDAILY MX <= 2.18 lb/d all year
001ChryseneDAILY AV <= .11 lb/d all year
001ChryseneDAILY MX <= .27 lb/d all year
001Diethyl phthalateDAILY AV <= .26 lb/d all year
001Diethyl phthalateDAILY MX <= .65 lb/d all year
001Dimethyl phthalateDAILY AV <= .11 lb/d all year
001Dimethyl phthalateDAILY MX <= .27 lb/d all year
001EthylbenzeneDAILY AV <= .81 lb/d all year
001EthylbenzeneDAILY MX <= 2.18 lb/d all year
001FluorantheneDAILY AV <= .13 lb/d all year
001FluorantheneDAILY MX <= .31 lb/d all year
001FluoreneDAILY AV <= .11 lb/d all year
001FluoreneDAILY MX <= .27 lb/d all year
001HexachlorobutadieneDAILY AV <= .019 lb/d all year
001HexachlorobutadieneDAILY MX <= .04 lb/d all year
001HexachloroethaneDAILY AV <= .2 lb/d all year
001HexachloroethaneDAILY MX <= .42 lb/d all year
001Methyl chloride [Chloromethane]DAILY AV <= .63 lb/d all year
001Methyl chloride [Chloromethane]DAILY MX <= 1.69 lb/d all year
001Methylene chlorideDAILY AV <= .21 lb/d all year
001Methylene chlorideDAILY MX <= .97 lb/d all year
001NitrobenzeneDAILY AV <= 12.8 lb/d all year
001NitrobenzeneDAILY MX <= 36.7 lb/d all year
001PhenanthreneDAILY AV <= .11 lb/d all year
001PhenanthreneDAILY MX <= .24 lb/d all year
001PyreneDAILY AV <= .11 lb/d all year
001PyreneDAILY MX <= .28 lb/d all year
001TetrachloroethyleneDAILY AV <= .3 lb/d all year
001TetrachloroethyleneDAILY MX <= .94 lb/d all year
0011,1-DichloroethaneDAILY AV <= .13 lb/d all year
0011,1-DichloroethaneDAILY MX <= .34 lb/d all year
0011,1-DichloroethyleneDAILY AV <= .13 lb/d all year
0011,1-DichloroethyleneDAILY MX <= .34 lb/d all year
0011,1,1-TrichloroethaneDAILY AV <= .13 lb/d all year
0011,1,1-TrichloroethaneDAILY MX <= .34 lb/d all year
0011,1,2-TrichloroethaneDAILY AV <= .18 lb/d all year
0011,1,2-TrichloroethaneDAILY MX <= .73 lb/d all year
001Benzo[a]anthraceneDAILY AV <= .0021 lb/d all year
001Benzo[a]anthraceneDAILY MX <= .0045 lb/d all year
0011,2-DichlorobenzeneDAILY AV <= 1.12 lb/d all year
0011,2-DichlorobenzeneDAILY MX <= 4.55 lb/d all year
0011,2-DichloropropaneDAILY AV <= 1.12 lb/d all year
0011,2-DichloropropaneDAILY MX <= 4.55 lb/d all year
001trans-1,2-DichloroethyleneDAILY AV <= .14 lb/d all year
001trans-1,2-DichloroethyleneDAILY MX <= .38 lb/d all year
0011,2,4-TrichlorobenzeneDAILY AV <= 1.12 lb/d all year
0011,2,4-TrichlorobenzeneDAILY MX <= 4.55 lb/d all year
0011,3-DichlorobenzeneDAILY AV <= .81 lb/d all year
0011,3-DichlorobenzeneDAILY MX <= 2.18 lb/d all year
0011,4-DichlorobenzeneDAILY AV <= .81 lb/d all year
0011,4-DichlorobenzeneDAILY MX <= 2.18 lb/d all year
0012-NitrophenolDAILY AV <= .37 lb/d all year
0012-NitrophenolDAILY MX <= 1.32 lb/d all year
0012,4-DimethylphenolDAILY AV <= .11 lb/d all year
0012,4-DimethylphenolDAILY MX <= .27 lb/d all year
0012,4-DinitrophenolDAILY AV <= 6.92 lb/d all year
0012,4-DinitrophenolDAILY MX <= 24.6 lb/d all year
0014-NitrophenolDAILY AV <= .93 lb/d all year
0014-NitrophenolDAILY MX <= 3.3 lb/d all year
0014,6-Dinitro-o-cresolDAILY AV <= .45 lb/d all year
0014,6-Dinitro-o-cresolDAILY MX <= 1.59 lb/d all year
001PhenolDAILY AV <= .11 lb/d all year
001PhenolDAILY MX <= .27 lb/d all year
001NaphthaleneDAILY AV <= .11 lb/d all year
001NaphthaleneDAILY MX <= .27 lb/d all year
001Di[2-ethylhexyl] phthalate [DEHP]DAILY AV <= .54 lb/d all year
001Di[2-ethylhexyl] phthalate [DEHP]DAILY MX <= 1.48 lb/d all year
001Di-n-butyl phthalateDAILY AV <= .11 lb/d all year
001Di-n-butyl phthalateDAILY MX <= .25 lb/d all year
001Vinyl chlorideDAILY AV <= .56 lb/d all year
001Vinyl chlorideDAILY MX <= .99 lb/d all year
001TrichloroethyleneDAILY AV <= .15 lb/d all year
001TrichloroethyleneDAILY MX <= .4 lb/d all year
001HexachlorobenzeneDAILY AV <= .000058 lb/d all year
001HexachlorobenzeneDAILY MX <= .00012 lb/d all year
001Flow, in conduit or thru treatment plantDAILY AV <= 1.5 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX <= 2 MGD all year
001Chlorine, total residualDAILY AV report only all year
001Chlorine, total residualDAILY MX <= .1 mg/L all year
0011,3-DichloropropyleneDAILY AV <= 1.12 lb/d all year
0011,3-DichloropropyleneDAILY MX <= 4.55 lb/d all year
0013,4-BenzofluorantheneDAILY AV <= .11 lb/d all year
0013,4-BenzofluorantheneDAILY MX <= .28 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
001ChloroethaneDAILY AV <= .63 lb/d all year
001ChloroethaneDAILY MX <= 1.69 lb/d all year
002BOD, 5-day, 20 deg. CDAILY MX <= 80 mg/L all year
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspendedDAILY MX <= 149 mg/L all year
002Oil & GreaseDAILY MX <= 15 mg/L all year
002Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
002Carbon tetrachlorideDAILY MX <= .38 mg/L all year
0021,2-DichloroethaneDAILY MX <= .574 mg/L all year
002ChloroformDAILY MX <= .325 mg/L all year
002TolueneDAILY MX <= .074 mg/L all year
002BenzeneDAILY MX <= .134 mg/L all year
002AcenaphthyleneDAILY MX <= .047 mg/L all year
002AcenaphtheneDAILY MX <= .047 mg/L all year
002AcrylonitrileDAILY MX <= .232 mg/L all year
002AnthraceneDAILY MX <= .047 mg/L all year
002Benzo[k]fluorantheneDAILY MX <= .047 mg/L all year
002Benzo[a]pyreneDAILY MX <= .023 mg/L all year
002ChlorobenzeneDAILY MX <= .38 mg/L all year
002ChryseneDAILY MX <= .047 mg/L all year
002Diethyl phthalateDAILY MX <= .113 mg/L all year
002Dimethyl phthalateDAILY MX <= .047 mg/L all year
002EthylbenzeneDAILY MX <= .38 mg/L all year
002FluorantheneDAILY MX <= .054 mg/L all year
002FluoreneDAILY MX <= .047 mg/L all year
002HexachlorobutadieneDAILY MX <= .38 mg/L all year
002HexachloroethaneDAILY MX <= .794 mg/L all year
002Methyl chloride [Chloromethane]DAILY MX <= .295 mg/L all year
002Methylene chlorideDAILY MX <= .17 mg/L all year
002NitrobenzeneDAILY MX <= 6.402 mg/L all year
002PhenanthreneDAILY MX <= .046 mg/L all year
002PyreneDAILY MX <= .048 mg/L all year
002TetrachloroethyleneDAILY MX <= .164 mg/L all year
0021,1-DichloroethaneDAILY MX <= .059 mg/L all year
0021,1-DichloroethyleneDAILY MX <= .06 mg/L all year
0021,1,1-TrichloroethaneDAILY MX <= .059 mg/L all year
0021,1,2-TrichloroethaneDAILY MX <= .127 mg/L all year
002Benzo[a]anthraceneDAILY MX <= .047 mg/L all year
0021,2-DichlorobenzeneDAILY MX <= .794 mg/L all year
0021,2-DichloropropaneDAILY MX <= .794 mg/L all year
002trans-1,2-DichloroethyleneDAILY MX <= .066 mg/L all year
0021,2,4-TrichlorobenzeneDAILY MX <= .794 mg/L all year
0021,3-DichlorobenzeneDAILY MX <= .38 mg/L all year
0021,4-DichlorobenzeneDAILY MX <= .38 mg/L all year
0022-NitrophenolDAILY MX <= .231 mg/L all year
0022,4-DimethylphenolDAILY MX <= .047 mg/L all year
0022,4-DinitrophenolDAILY MX <= 4.291 mg/L all year
0024-NitrophenolDAILY MX <= .576 mg/L all year
0024,6-Dinitro-o-cresolDAILY MX <= .277 mg/L all year
002PhenolDAILY MX <= .047 mg/L all year
002NaphthaleneDAILY MX <= .047 mg/L all year
002Di[2-ethylhexyl] phthalate [DEHP]DAILY MX <= .258 mg/L all year
002Di-n-butyl phthalateDAILY MX <= .043 mg/L all year
002Vinyl chlorideDAILY MX <= .172 mg/L all year
002TrichloroethyleneDAILY MX <= .069 mg/L all year
002HexachlorobenzeneDAILY MX <= .325 mg/L all year
002Flow, in conduit or thru treatment plantDAILY AV report only all year
002Flow, in conduit or thru treatment plantDAILY MX report only all year
0021,3-DichloropropyleneDAILY MX <= .794 mg/L all year
0023,4-BenzofluorantheneDAILY MX <= .048 mg/L all year
002ChloroethaneDAILY MX <= .295 mg/L all year
102pHMINIMUM >= 6 SU all year
102pHMAXIMUM <= 9 SU all year
102Solids, total suspendedDAILY MX <= 149 mg/L all year
102Oil & GreaseDAILY MX <= 15 mg/L all year
102Carbon, tot organic [TOC]DAILY MX <= 75 mg/L all year
102Flow, in conduit or thru treatment plantDAILY AV report only all year
102Flow, in conduit or thru treatment plantDAILY MX report only 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 beryllina7 DA MIN report only all year
TX1Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia beryllinaMO 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 beryllina7 DA MIN report only all year
TX1NOEC Lethal Static Renewal 7 Day Chronic Menidia beryllinaMO 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 beryllina7 DA MIN report only all year
TX1NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllinaMO 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 beryllina7 DA MIN report only all year
TX1Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia beryllinaMO 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 beryllina7 DA MIN report only all year
TX1LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia beryllinaMO 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 Growth Static Renewal 7 Day Chronic Menidia beryllina7 DA MIN report only all year
TX1LOEC Sub-Lethal Growth Static Renewal 7 Day Chronic Menidia beryllinaMO 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 beryllinaSINGSAMP report only all year

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