Clean Water Act discharge permit · NPDES LA0127190
DENKA PERFORMANCE ELASTOMER LLC - PONTCHARTRAIN PLANT, Laplace, LA: NPDES LA0127190 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 24Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
DENKA PERFORMANCE ELASTOMER LLC - PONTCHARTRAIN PLANT, held by DENKA PERFORMANCE ELASTOMER LLC, holds NPDES permit LA0127190. EPA’s file records it issued August 18, 2017 and expiring August 31, 2022. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | DENKA PERFORMANCE ELASTOMER LLC - PONTCHARTRAIN PLANT |
|---|---|
| Permittee as filed | DENKA PERFORMANCE ELASTOMER LLC |
| NPDES ID | LA0127190 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | August 18, 2017 |
| Expiration date | August 31, 2022 |
| Address | Laplace, LA 70068 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Claiborne Island (HUC 080701000105) |
| Other EPA IDs (FRS) | RCRA handler LAR000009415; ICIS-AIR source LA0000002209500063 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 24Pollutants on file
- 24Under a numeric limit
- 21With a violation of any kind
- 6With an effluent exceedance
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.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Coliform, fecal general | 4 | 14 | 10 | February 28, 2026 | 99,999% over the limit |
| Chloroprene | 4 | 7 | 2 | December 31, 2018 | 26% over the limit |
| Solids, total suspended | 8 | 7 | 1 | January 31, 2022 | 16% over the limit |
| Oil & Grease | 6 | 6 | 1 | January 31, 2022 | 35% over the limit |
| BOD, 5-day, 20 deg. C | 4 | 5 | 1 | November 30, 2023 | 23% over the limit |
| Oxygen demand, chem. [high level] [COD] | 4 | 5 | 1 | December 31, 2022 | 0% over the limit |
| pH | 10 | 10 | 0 | ||
| Flow, in conduit or thru treatment plant | 10 | 10 | 0 | ||
| Low Flow Pass/Fail Static Renewal 48Hr Acute Daphnia pulex | 4 | 2 | 0 | ||
| LF Pass/Fail Static Renewal 48Hr Acute Pimephales promelas | 4 | 2 | 0 | ||
| NOAEC Lethal Statis Renewal 48 Hr Acute Daphnia pulex | 4 | 2 | 0 | ||
| NOAEC Lethal Static Renewal 48Hr acute Pimephales promelas | 4 | 2 | 0 | ||
| Carbon, tot organic [TOC] | 3 | 2 | 0 | ||
| Total production - mass | 2 | 2 | 0 | ||
| Lead, total [as Pb] | 2 | 1 | 0 | ||
| Benzene | 2 | 1 | 0 | ||
| BTEX | 2 | 1 | 0 | ||
| Coef Of Var Static Renewal 48Hr Acute D. pulex | 2 | 1 | 0 | ||
| Coef Of Var Static Renewal 48Hr Acute Pimephales promelas | 2 | 1 | 0 | ||
| pH range excursions, > 60 minutes | 1 | 1 | 0 | ||
| pH range excursions, monthly total accum | 1 | 1 | 0 | ||
| Whole effluent toxicity - retest #1 | 8 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 8 | 0 | 0 | ||
| Whole Effluent Toxicity - Retest #3 | 8 | 0 | 0 |
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
- 7Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| February 4, 2025 | Monitoring Violations - Analysis not Conducted | ST6 |
| December 6, 2023 | Management Practice Violations - Failure to Implement SPCC Plan | ST6 |
| February 6, 2023 | Reporting Violations - Noncompliance with Section 308 Information Request | ST6 |
| December 21, 2022 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| December 21, 2022 | Effluent Violations - Industrial Spill | ST6 |
| December 5, 2022 | Monitoring Violations - Improper Analysis or Lab Error | ST6 |
| January 31, 2022 | Permit Violations - Violation Specified in Comment | ST6 |
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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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.