Clean Water Act discharge permit · NPDES MO0135950
AEROSPACE COMPOSITES CENTER LLC, St. Louis, MO: NPDES MO0135950 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 14Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
AEROSPACE COMPOSITES CENTER LLC, held by GKN Aerospace North America, Inc., holds NPDES permit MO0135950, which discharges to 100k Extent-Remaining Streams. EPA’s file records it issued June 8, 2021 and expiring March 31, 2026. 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 filed | AEROSPACE COMPOSITES CENTER LLC |
|---|---|
| Permittee as filed | GKN Aerospace North America, Inc. |
| NPDES ID | MO0135950 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Industrial stormwater |
| Issued | June 8, 2021 |
| Expiration date | March 31, 2026 |
| Address | St. Louis, MO 63042 |
| Receiving water | 100K Extent-Remaining Streams |
| Subwatershed | Headwaters Coldwater Creek (HUC 103002000802) |
| SIC | 3728 – Aircraft Parts And Equipment |
| Other EPA IDs (FRS) | RCRA handler MOR000043547; ICIS-AIR source MO0000002918901489 |
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
- 14Pollutants on file
- 14Under a numeric limit
- 14With a violation of any kind
- 4With 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 |
|---|---|---|---|---|---|
| Oxygen demand, chem. [high level] [COD] | 1 | 24 | 23 | June 30, 2016 | 1,033% over the limit |
| Solids, total suspended | 1 | 12 | 11 | June 30, 2016 | 504% over the limit |
| Copper, total recoverable | 1 | 9 | 8 | March 31, 2020 | 287% over the limit |
| Oil and grease [soxhlet extr.] tot. | 1 | 2 | 1 | March 31, 2014 | 30% over the limit |
| pH | 2 | 2 | 0 | ||
| Hardness, total [as CaCO3] | 1 | 1 | 0 | ||
| Iron, total recoverable | 1 | 1 | 0 | ||
| Zinc, total recoverable | 1 | 1 | 0 | ||
| Aluminum, total recoverable | 1 | 1 | 0 | ||
| Cadmium, total recoverable | 1 | 1 | 0 | ||
| Lead, total recoverable | 1 | 1 | 0 | ||
| Chromium, hexavalent dissolved [as Cr] | 1 | 1 | 0 | ||
| Rainfall | 1 | 1 | 0 | ||
| Storm water flow | 1 | 1 | 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
- 4Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| August 26, 2025 | Effluent Violations - Unauthorized Discharge | ST6 |
| August 26, 2025 | Permit Violations - Violation Specified in Comment | ST6 |
| August 26, 2025 | Effluent Violations - Numeric effluent violation | ST6 |
| October 11, 2017 | WW Storm Water Construction - Failure to develop any or adequate SWPPP/SWMP | 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 October 14, 2026.