Clean Water Act discharge permit · NPDES TX0006904
VALERO REFINING CO EAST PLANT, Corpus Christi, TX: NPDES TX0006904 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 32Pollutants under a numeric limit
- 10Pollutants with an effluent exceedance
- 1Inspections on file
- 0Formal enforcement actions
VALERO REFINING CO EAST PLANT, held by VALERO REFINING EAST PLANT, holds NPDES permit TX0006904, which discharges to Unnamed Drainage Ditch. EPA’s file records it issued May 21, 2015 and expiring April 1, 2020.
VALERO REFINING CO EAST PLANT, Corpus Christi, Texas: Individual permit TX0006904, held by VALERO REFINING EAST PLANT; Administratively continued (past its expiration date and still in force until reissued); issued May 21, 2015, term to April 1, 2020; discharges to UNNAMED DRAINAGE DITCH.
- BOD, 5-day, 20 deg. C: 3 limits, 22 violations of any kind, 9 effluent exceedances, latest May 31, 2022, largest 307% over the limit.
- pH: 12 limits, 20 violations of any kind, 6 effluent exceedances, latest November 30, 2025.
- Chromium, hexavalent [as Cr]: 2 limits, 47 violations of any kind, 5 effluent exceedances, latest March 31, 2024, largest 674% over the limit.
- Solids, total suspended: 2 limits, 36 violations of any kind, 5 effluent exceedances, latest June 30, 2024, largest 24% over the limit.
- Carbon, tot organic [TOC]: 4 limits, 9 violations of any kind, 5 effluent exceedances, latest May 31, 2020, largest 193% over the limit.
- Oil & Grease: 6 limits, 35 violations of any kind, 3 effluent exceedances, latest April 30, 2026, largest 301% over the limit.
- Sulfide, total [as S]: 2 limits, 32 violations of any kind, 2 effluent exceedances, latest May 31, 2023, largest 231% over the limit.
- Nitrogen, ammonia total [as N]: 3 limits, 12 violations of any kind, 2 effluent exceedances, latest November 30, 2019, largest 50% over the limit.
- Copper, total [as Cu]: 0 limits, 7 violations of any kind, 1 effluent exceedance, latest March 31, 1999, largest 26% over the limit.
- pH range excursions, > 60 minutes: 2 limits, 2 violations of any kind, 1 effluent exceedance, latest February 28, 2013, largest 2,147,483,650% over the limit.
- Oxygen demand, chem. [high level] [COD]: 2 limits, 32 violations of any kind, 0 effluent exceedances.
- Chromium, total [as Cr]: 2 limits, 31 violations of any kind, 0 effluent exceedances.
- Phenolic compounds, total: 2 limits, 24 violations of any kind, 0 effluent exceedances.
- Flow, in conduit or thru treatment plant: 12 limits, 18 violations of any kind, 0 effluent exceedances.
- Cyanide, free [amenable to chlorination]: 0 limits, 10 violations of any kind, 0 effluent exceedances.
- Phenolics, total recoverable: 0 limits, 9 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 5 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 5 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 5 violations of any kind, 0 effluent exceedances.
- Temperature, water deg. fahrenheit: 1 limit, 5 violations of any kind, 0 effluent exceedances.
- Flow [dry weather]: 2 limits, 4 violations of any kind, 0 effluent exceedances.
- Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia): 2 limits, 3 violations of any kind, 0 effluent exceedances.
- NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia): 2 limits, 3 violations of any kind, 0 effluent exceedances.
- NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia): 2 limits, 3 violations of any kind, 0 effluent exceedances.
- LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia): 1 limit, 3 violations of any kind, 0 effluent exceedances.
- LC50 Pass/Fail Static 24Hr Acute Cyprinodon variegatus: 0 limits, 3 violations of any kind, 0 effluent exceedances.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia: 2 limits, 2 violations of any kind, 0 effluent exceedances.
- pH range excursions, monthly total accum: 2 limits, 1 violation of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #1: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Whole effluent toxicity - retest #2: 3 limits, 0 violations of any kind, 0 effluent exceedances.
- Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia): 2 limits, 0 violations of any kind, 0 effluent exceedances.
- LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia): 2 limits, 0 violations of any kind, 0 effluent exceedances.
- LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia): 2 limits, 0 violations of any kind, 0 effluent exceedances.
- LC50 Pass/Fail Static 24Hr Acute Menidia menidia: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- June 1, 2026: Evaluation (E).
- July 17, 2025: Permit Violations - Violation Specified in Comment (ST6).
- February 5, 2025: Permit Violations - Violation Specified in Comment (ST6).
VALERO REFINING CO EAST PLANT among its neighbors
EPA’s permit file holds 64 discharge permits in the Tule Lake subwatershed (HUC 121102020107), TX0006904 among them. Its county holds 317, 24 of them major permits; TX0006904 is a major permit.
Other permits in the Tule Lake subwatershed (HUC 121102020107)
- 3L ENERGY SOLUTIONS, Corpus Christi: TXR05GK38, minor permit, permit term to August 13, 2026
- AL SPEIGHT MILITARY RAIL YARD, Corpus Christi: TXR1510RB, minor permit, discharging to CORPUS CHRISTI SHIP CHANNEL INNER HARBOR, permit term to March 4, 2028
- AMERICAN CHROME & CHEMICALS, Corpus Christi: TX0004685, major permit, discharging to CORPUS CHRISTI INNER HARBOR, permit term to November 26, 2023
- B&M MACHINERY, Corpus Christi: TXR05GM93, minor permit, permit term to August 13, 2026
- BAY DOCK EAST, Corpus Christi: TXR05FG72, minor permit, permit term to August 13, 2026
- BEAED OF CORPUS, Corpus Christi: TXRNECH01, minor permit, permit term to August 13, 2026
- BUCKEYE TEXAS HUB, Corpus Christi: TX0143014, minor permit, discharging to Corpus Christi Inner Harbor, permit term to February 10, 2028
- BUCKEYE TEXAS HUB, Corpus Christi: TXR05FN63, minor permit, permit term to August 13, 2026
- BUCKEYE TEXAS PROCESSING, Corpus Christi: TXG670514, minor permit, permit term to April 4, 2025
- BULK TERMINAL IMPROVEMENTS AND EXPANSION, Corpus Christi: TXR1538YQ, minor permit, discharging to CORPUS CHRISTI SHIP CHANNEL INNER HARBOR, permit term to March 4, 2028
Identity
| Facility as filed | VALERO REFINING CO EAST PLANT |
|---|---|
| Permittee as filed | VALERO REFINING EAST PLANT |
| NPDES ID | TX0006904 |
| 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 | May 21, 2015 |
| Expiration date | April 1, 2020 |
| Address | Corpus Christi, TX 78469 |
| Receiving water | UNNAMED DRAINAGE DITCH |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Tule Lake (HUC 121102020107) |
| Other EPA IDs (FRS) | RCRA handler TXD008132268; ICIS-AIR source TX0000004835500018 |
Effluent limits and exceedances
- 36Pollutants on file
- 32Under a numeric limit
- 30With a violation of any kind
- 10With 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 |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 3 | 22 | 9 | May 31, 2022 | 307% over the limit |
| pH | 12 | 20 | 6 | November 30, 2025 | |
| Chromium, hexavalent [as Cr] | 2 | 47 | 5 | March 31, 2024 | 674% over the limit |
| Solids, total suspended | 2 | 36 | 5 | June 30, 2024 | 24% over the limit |
| Carbon, tot organic [TOC] | 4 | 9 | 5 | May 31, 2020 | 193% over the limit |
| Oil & Grease | 6 | 35 | 3 | April 30, 2026 | 301% over the limit |
| Sulfide, total [as S] | 2 | 32 | 2 | May 31, 2023 | 231% over the limit |
| Nitrogen, ammonia total [as N] | 3 | 12 | 2 | November 30, 2019 | 50% over the limit |
| Copper, total [as Cu] | 0 | 7 | 1 | March 31, 1999 | 26% over the limit |
| pH range excursions, > 60 minutes | 2 | 2 | 1 | February 28, 2013 | 2,147,483,650% over the limit |
| Oxygen demand, chem. [high level] [COD] | 2 | 32 | 0 | ||
| Chromium, total [as Cr] | 2 | 31 | 0 | ||
| Phenolic compounds, total | 2 | 24 | 0 | ||
| Flow, in conduit or thru treatment plant | 12 | 18 | 0 | ||
| Cyanide, free [amenable to chlorination] | 0 | 10 | 0 | ||
| Phenolics, total recoverable | 0 | 9 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia | 2 | 5 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia | 2 | 5 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 2 | 5 | 0 | ||
| Temperature, water deg. fahrenheit | 1 | 5 | 0 | ||
| Flow [dry weather] | 2 | 4 | 0 | ||
| Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 2 | 3 | 0 | ||
| NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 3 | 0 | ||
| NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 3 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | 1 | 3 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Cyprinodon variegatus | 0 | 3 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia | 2 | 2 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia | 2 | 2 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia | 2 | 2 | 0 | ||
| pH range excursions, monthly total accum | 2 | 1 | 0 | ||
| Whole effluent toxicity - retest #1 | 3 | 0 | 0 | ||
| Whole effluent toxicity - retest #2 | 3 | 0 | 0 | ||
| Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 0 | 0 | ||
| LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 2 | 0 | 0 | ||
| LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia) | 2 | 0 | 0 | ||
| LC50 Pass/Fail Static 24Hr Acute Menidia menidia | 1 | 0 | 0 |
Inspections, violations and enforcement
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| July 17, 2025 | Permit Violations - Violation Specified in Comment | ST6 |
| February 5, 2025 | Permit Violations - Violation Specified in Comment | ST6 |
Inspections
| Date | What EPA recorded | Agency |
|---|---|---|
| June 1, 2026 | Evaluation | E |
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 TX0006904.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.