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Clean Water Act discharge permit · NPDES LA0000833

TRECORA MONOMERS LLC, Baton Rouge, LA: NPDES LA0000833 discharge permit, effluent exceedances, inspections, penalties

TRECORA MONOMERS LLC, held by Deltech Monomers OpCo, LLC, holds NPDES permit LA0000833, which discharges to Mississippi River Via B.R.B.H.. EPA’s file records it issued October 18, 2016 and expiring November 30, 2021. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filedTRECORA MONOMERS LLC
Permittee as filedDeltech Monomers OpCo, LLC
NPDES IDLA0000833
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMajor discharger
Facility typeNot a publicly owned treatment works
IssuedOctober 18, 2016
Expiration dateNovember 30, 2021
AddressBaton Rouge, LA 70807
Receiving waterMISSISSIPPI RIVER VIA B.R.B.H.
Receiving water impaired303(D) Listed
SubwatershedDevils Swamp-Bayou Baton Rouge (HUC 080702010402)
SIC2865 – Cyclic Crudes And Intermediates
Other EPA IDs (FRS)RCRA handler LAD008188583; ICIS-AIR source LA0000002203300006

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant; the 60 with the most exceedances of 83 are shown.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Solids, total suspended45551December 31, 2025215% over the limit
pH range excursions, > 60 minutes12625July 31, 20252,147,483,650% over the limit
pH6339March 31, 2023
pH range excursions, monthly total accum198June 30, 2024398% over the limit
Carbon, tot organic [TOC]4204March 31, 2018104% over the limit
BOD, 5-day, 20 deg. C264October 31, 2025871% over the limit
Ethylbenzene242June 30, 2014100% over the limit
Toluene231July 31, 201575% over the limit
Flow, in conduit or thru treatment plant10270
Hexachlorobutadiene2140
Hexachlorobenzene2140
Oil and grease2120
Acenaphthene260
Anthracene260
4,6-Dinitro-o-cresol260
Vinyl chloride260
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas060
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas060
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas060
Oil & Grease150
Carbon tetrachloride240
1,2-Dichloroethane240
Chloroform240
Benzene240
Acenaphthylene240
Benzo[b]fluoranthene240
Benzo[k]fluoranthene240
Benzo[a]pyrene240
Chlorobenzene240
Chrysene240
Diethyl phthalate240
Dimethyl phthalate240
Fluoranthene240
Fluorene240
Hexachloroethane240
Methyl chloride [Chloromethane]240
Methylene chloride240
Nitrobenzene240
Phenanthrene240
Pyrene240
Tetrachloroethylene240
1,1-Dichloroethane240
1,1-Dichloroethylene240
1,1,1-Trichloroethane240
1,1,2-Trichloroethane240
Benzo[a]anthracene240
1,2-Dichloropropane240
trans-1,2-Dichloroethylene240
1,2,4-Trichlorobenzene240
2-Chlorophenol240
2-Nitrophenol240
2,4-Dichlorophenol240
2,4-Dimethylphenol240
2,4-Dinitrotoluene240
2,4-Dinitrophenol240
2,6-Dinitrotoluene240
4-Nitrophenol240
Phenol240
Naphthalene240
Di[2-ethylhexyl] phthalate [DEHP]240

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

DateWhat EPA recordedAgency
June 20, 2018Monitoring Violations - Improper Analysis or Lab ErrorST6
June 20, 2018Monitoring Violations - Invalid/Unrepresentative SampleST6
May 16, 2018Permit Violations - Discharge Without a Valid PermitST6

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

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How we handle your data → Privacy

EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID LA0000833 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

What this page shows

This page covers NPDES permit LA0000833, held by TRECORA MONOMERS LLC of Baton Rouge, LA, with its permittee listed as Deltech Monomers OpCo, LLC, and discharging to the MISSISSIPPI RIVER VIA B.R.B.H. The permit is listed as administratively continued and a Major Discharger, with 8 pollutants under a numeric limit and 8 pollutants with an effluent exceedance. The permit was issued October 18, 2016 and carried an expiration date of November 30, 2021.