Clean Water Act discharge permit · NPDES TX0116131
UNIMIN CORPORATION VOCA PLANT, Mcculloch County, TX: NPDES TX0116131 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 4Pollutants under a numeric limit
- 1Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
UNIMIN CORPORATION VOCA PLANT, held by UNIMIN CORPORATION, holds NPDES permit TX0116131, which discharges to Concrete Culvert Under Sthwy, Tiger. EPA’s file records it issued January 28, 2010 and expiring December 1, 2014.
UNIMIN CORPORATION VOCA PLANT, Mcculloch County, Texas: Individual permit TX0116131, held by UNIMIN CORPORATION; Administratively continued (past its expiration date and still in force until reissued); issued January 28, 2010, term to December 1, 2014; discharges to CONCRETE CULVERT UNDER STHWY, TIGER.
- Solids, total suspended: 4 limits, 110 violations of any kind, 8 effluent exceedances, latest October 31, 2018, largest 100% over the limit.
- pH: 4 limits, 104 violations of any kind, 0 effluent exceedances.
- Flow, in conduit or thru treatment plant: 4 limits, 104 violations of any kind, 0 effluent exceedances.
- Lead, total [as Pb]: 4 limits, 18 violations of any kind, 0 effluent exceedances.
- December 20, 2017: Permit Violations - Violation Specified in Comment (ST6).
UNIMIN CORPORATION VOCA PLANT among its neighbors
EPA’s permit file holds 4 discharge permits in the Headwaters Tiger Creek subwatershed (HUC 120901090704), TX0116131 among them. Its county holds 15, 1 of them major permits; TX0116131 is a minor permit.
Other permits in the Headwaters Tiger Creek subwatershed (HUC 120901090704)
- FML VOCA, Voca: TX0136506, not classed
- VOCA PLANT, Voca: TXR05GZ30, minor permit, permit term to August 13, 2026
- VOCA SOUTH, Voca: TXR05GQ59, minor permit, permit term to August 13, 2026
Identity
| Facility as filed | UNIMIN CORPORATION VOCA PLANT |
|---|---|
| Permittee as filed | UNIMIN CORPORATION |
| NPDES ID | TX0116131 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | January 28, 2010 |
| Expiration date | December 1, 2014 |
| Address | Mcculloch County, TX 76887 |
| Receiving water | CONCRETE CULVERT UNDER STHWY, TIGER |
| Subwatershed | Headwaters Tiger Creek (HUC 120901090704) |
| SIC | 1446 – Industrial Sand |
Effluent limits and exceedances
- 4Pollutants on file
- 4Under a numeric limit
- 4With a violation of any kind
- 1With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 4 | 110 | 8 | October 31, 2018 | 100% over the limit |
| pH | 4 | 104 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 104 | 0 | ||
| Lead, total [as Pb] | 4 | 18 | 0 |
Inspections, violations and enforcement
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| December 20, 2017 | Permit Violations - Violation Specified in Comment | ST6 |
Inspections
EPA’s inspection file holds no inspection for NPDES TX0116131.
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES TX0116131.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, TX0116131.
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- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
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Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.