SI GROUP INC

NPDES permit TX0067946 · Minor NON-POTW · effective, expires 2030-01-02 · 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

0values over a limit
1required values missing, on 1 form(s)
0of 23 forms filed late

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

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 (123)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitDAILY MX <= 95 deg F all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Oil & GreaseDAILY MX <= 15 mg/L all year
001Carbon, tot organic [TOC]DAILY MX <= 55 mg/L all year
001PhenolDAILY MX <= .4 mg/L all year
001Flow [dry weather]DAILY MX <= 5.6 MGD all year
101BOD, 5-day, 20 deg. CDAILY AV <= 17 lb/d all year
101BOD, 5-day, 20 deg. CDAILY MX <= 46 lb/d all year
101pHMINIMUM >= 6 SU all year
101pHMAXIMUM <= 9 SU all year
101Solids, total suspendedDAILY AV <= 25 lb/d all year
101Solids, total suspendedDAILY MX <= 80 lb/d all year
101Oil & GreaseDAILY AV <= 5.2 lb/d all year
101Oil & GreaseDAILY MX <= 25 lb/d all year
101Carbon, tot organic [TOC]DAILY AV <= 52 lb/d all year
101Carbon, tot organic [TOC]DAILY MX <= 104 lb/d all year
101Carbon tetrachlorideDAILY AV <= .07 lb/d all year
101Carbon tetrachlorideDAILY MX <= .2 lb/d all year
1011,2-DichloroethaneDAILY AV <= .09 lb/d all year
1011,2-DichloroethaneDAILY MX <= .3 lb/d all year
101ChloroformDAILY AV <= .06 lb/d all year
101ChloroformDAILY MX <= .17 lb/d all year
101TolueneDAILY AV <= .01 lb/d all year
101TolueneDAILY MX <= .04 lb/d all year
101BenzeneDAILY AV <= .03 lb/d all year
101BenzeneDAILY MX <= .07 lb/d all year
101AcenaphthyleneDAILY AV <= .01 lb/d all year
101AcenaphthyleneDAILY MX <= .02 lb/d all year
101AcenaphtheneDAILY AV <= .01 lb/d all year
101AcenaphtheneDAILY MX <= .02 lb/d all year
101AcrylonitrileDAILY AV <= .05 lb/d all year
101AcrylonitrileDAILY MX <= .12 lb/d all year
101AnthraceneDAILY AV <= .01 lb/d all year
101AnthraceneDAILY MX <= .02 lb/d all year
101Benzo[k]fluorantheneDAILY AV <= .01 lb/d all year
101Benzo[k]fluorantheneDAILY MX <= .02 lb/d all year
101Benzo[a]pyreneDAILY AV <= .01 lb/d all year
101Benzo[a]pyreneDAILY MX <= .02 lb/d all year
101ChlorobenzeneDAILY AV <= .07 lb/d all year
101ChlorobenzeneDAILY MX <= .2 lb/d all year
101ChryseneDAILY AV <= .01 lb/d all year
101ChryseneDAILY MX <= .02 lb/d all year
101Diethyl phthalateDAILY AV <= .02 lb/d all year
101Diethyl phthalateDAILY MX <= .06 lb/d all year
101Dimethyl phthalateDAILY AV <= .01 lb/d all year
101Dimethyl phthalateDAILY MX <= .02 lb/d all year
101EthylbenzeneDAILY AV <= .07 lb/d all year
101EthylbenzeneDAILY MX <= .19 lb/d all year
101FluorantheneDAILY AV <= .01 lb/d all year
101FluorantheneDAILY MX <= .03 lb/d all year
101FluoreneDAILY AV <= .01 lb/d all year
101FluoreneDAILY MX <= .02 lb/d all year
101HexachlorobutadieneDAILY AV <= .07 lb/d all year
101HexachlorobutadieneDAILY MX <= .2 lb/d all year
101HexachloroethaneDAILY AV <= .1 lb/d all year
101HexachloroethaneDAILY MX <= .41 lb/d all year
101Methyl chloride [Chloromethane]DAILY AV <= .06 lb/d all year
101Methyl chloride [Chloromethane]DAILY MX <= .15 lb/d all year
101Methylene chlorideDAILY AV <= .02 lb/d all year
101Methylene chlorideDAILY MX <= .09 lb/d all year
101NitrobenzeneDAILY AV <= 1.16 lb/d all year
101NitrobenzeneDAILY MX <= 3.31 lb/d all year
101PhenanthreneDAILY AV <= .01 lb/d all year
101PhenanthreneDAILY MX <= .02 lb/d all year
101PyreneDAILY AV <= .01 lb/d all year
101PyreneDAILY MX <= .02 lb/d all year
101TetrachloroethyleneDAILY AV <= .03 lb/d all year
101TetrachloroethyleneDAILY MX <= .08 lb/d all year
1011,1-DichloroethaneDAILY AV <= .01 lb/d all year
1011,1-DichloroethaneDAILY MX <= .03 lb/d all year
1011,1-DichloroethyleneDAILY AV <= .01 lb/d all year
1011,1-DichloroethyleneDAILY MX <= .03 lb/d all year
1011,1,1-TrichloroethaneDAILY AV <= .01 lb/d all year
1011,1,1-TrichloroethaneDAILY MX <= .03 lb/d all year
1011,1,2-TrichloroethaneDAILY AV <= .01 lb/d all year
1011,1,2-TrichloroethaneDAILY MX <= .07 lb/d all year
101Benzo[a]anthraceneDAILY AV <= .01 lb/d all year
101Benzo[a]anthraceneDAILY MX <= .02 lb/d all year
1011,2-DichlorobenzeneDAILY AV <= .1 lb/d all year
1011,2-DichlorobenzeneDAILY MX <= .41 lb/d all year
1011,2-DichloropropaneDAILY AV <= .1 lb/d all year
1011,2-DichloropropaneDAILY MX <= .41 lb/d all year
101trans-1,2-DichloroethyleneDAILY AV <= .01 lb/d all year
101trans-1,2-DichloroethyleneDAILY MX <= .03 lb/d all year
1011,2,4-TrichlorobenzeneDAILY AV <= .1 lb/d all year
1011,2,4-TrichlorobenzeneDAILY MX <= .41 lb/d all year
1011,3-DichlorobenzeneDAILY AV <= .07 lb/d all year
1011,3-DichlorobenzeneDAILY MX <= .2 lb/d all year
1011,4-DichlorobenzeneDAILY AV <= .07 lb/d all year
1011,4-DichlorobenzeneDAILY MX <= .2 lb/d all year
1012-NitrophenolDAILY AV <= .03 lb/d all year
1012-NitrophenolDAILY MX <= .12 lb/d all year
1012,4-DimethylphenolDAILY AV <= .01 lb/d all year
1012,4-DimethylphenolDAILY MX <= .02 lb/d all year
1012,4-DinitrophenolDAILY AV <= .62 lb/d all year
1012,4-DinitrophenolDAILY MX <= 2.22 lb/d all year
1014-NitrophenolDAILY AV <= .08 lb/d all year
1014-NitrophenolDAILY MX <= .3 lb/d all year
1014,6-Dinitro-o-cresolDAILY AV <= .04 lb/d all year
1014,6-Dinitro-o-cresolDAILY MX <= .14 lb/d all year
101PhenolDAILY AV <= .01 lb/d all year
101PhenolDAILY MX <= .02 lb/d all year
101NaphthaleneDAILY AV <= .01 lb/d all year
101NaphthaleneDAILY MX <= .02 lb/d all year
101Di[2-ethylhexyl] phthalate [DEHP]DAILY AV <= .05 lb/d all year
101Di[2-ethylhexyl] phthalate [DEHP]DAILY MX <= .13 lb/d all year
101Di-n-butyl phthalateDAILY AV <= .01 lb/d all year
101Di-n-butyl phthalateDAILY MX <= .02 lb/d all year
101Vinyl chlorideDAILY AV <= .05 lb/d all year
101Vinyl chlorideDAILY MX <= .09 lb/d all year
101TrichloroethyleneDAILY AV <= .01 lb/d all year
101TrichloroethyleneDAILY MX <= .04 lb/d all year
101HexachlorobenzeneDAILY AV <= .1 lb/d all year
101HexachlorobenzeneDAILY MX <= .41 lb/d all year
101Flow, in conduit or thru treatment plantDAILY AV <= .2 MGD all year
101Flow, in conduit or thru treatment plantDAILY MX <= .6 MGD all year
1011,3-DichloropropyleneDAILY AV <= .1 lb/d all year
1011,3-DichloropropyleneDAILY MX <= .41 lb/d all year
1013,4-BenzofluorantheneDAILY AV <= .01 lb/d all year
1013,4-BenzofluorantheneDAILY MX <= .02 lb/d all year
101ChloroethaneDAILY AV <= .06 lb/d all year
101ChloroethaneDAILY MX <= .15 lb/d 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