Facility profile
Diamond Shamrock Refining Company, L.p.
Violation Identified across 3 of the last 12 quarters in the imported ECHO record.
Noncompliance quarters
3
Counted from the imported ECHO record over the last 12 quarters.
Penalties
$0
Recorded enforcement amount carried into the facility page.
Last inspection
2025-03-21
Displayed as plain language instead of hidden in agency exports.
Trend
Watch
Reported on-site releases are lower in 2024 than in 2022.
| Year | Air | Water | Land | Total |
|---|---|---|---|---|
| 2022 | 218,641 lbs | 300 lbs | 749,350 lbs | 968,291 lbs |
| 2023 | 247,290 lbs | 506 lbs | 1,295,015 lbs | 1,542,812 lbs |
| 2024 | 216,530 lbs | 524 lbs | 693,484 lbs | 910,537 lbs |
Chemical breakdown
What this facility is reporting
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Methanol
Latest 2024 TRI data shows land as the largest reported pathway for this chemical at the facility.
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Ammonia
Latest 2024 TRI data shows land as the largest reported pathway for this chemical at the facility.
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Nitrate compounds (water dissociable; reportable only when in aqueous solution)
Latest 2024 TRI data shows land as the largest reported pathway for this chemical at the facility.
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Hydrogen cyanide
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Toluene
Latest 2024 TRI data shows land as the largest reported pathway for this chemical at the facility.
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Benzene
Latest 2024 TRI data shows land as the largest reported pathway for this chemical at the facility.
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tert-Butyl alcohol
Latest 2024 TRI data shows land as the largest reported pathway for this chemical at the facility.
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Xylene (mixed isomers)
Latest 2024 TRI data shows land as the largest reported pathway for this chemical at the facility.
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Phenol
Latest 2024 TRI data shows land as the largest reported pathway for this chemical at the facility.
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Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Cresol (mixed isomers)
Latest 2024 TRI data shows land as the largest reported pathway for this chemical at the facility.
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Hydrogen sulfide
Latest 2024 TRI data shows land as the largest reported pathway for this chemical at the facility.
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Ethylene glycol
Latest 2024 TRI data shows land as the largest reported pathway for this chemical at the facility.
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Propylene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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n-Hexane
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Cyclohexane
Latest 2024 TRI data shows land as the largest reported pathway for this chemical at the facility.
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1, 2, 4-Trimethylbenzene
Latest 2024 TRI data shows land as the largest reported pathway for this chemical at the facility.
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Ethylbenzene
Latest 2024 TRI data shows land as the largest reported pathway for this chemical at the facility.
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Ethylene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Polycyclic aromatic compounds
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Naphthalene
Latest 2024 TRI data shows land as the largest reported pathway for this chemical at the facility.
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Zinc compounds
Latest 2024 TRI data shows land as the largest reported pathway for this chemical at the facility.
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Carbon disulfide
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Cumene
Latest 2024 TRI data shows land as the largest reported pathway for this chemical at the facility.
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Phenanthrene
Latest 2024 TRI data shows land as the largest reported pathway for this chemical at the facility.
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Styrene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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1, 3-Butadiene
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Carbonyl sulfide
Latest 2024 TRI data shows land as the largest reported pathway for this chemical at the facility.
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Tetrachloroethylene
Latest 2024 TRI data shows land as the largest reported pathway for this chemical at the facility.
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Lead compounds
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Anthracene
Latest 2024 TRI data shows land as the largest reported pathway for this chemical at the facility.
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Benzo[g, h, i]perylene
Latest 2024 TRI data shows land as the largest reported pathway for this chemical at the facility.
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Mercury compounds
Latest 2024 TRI data shows air as the largest reported pathway for this chemical at the facility.
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Dioxin and dioxin-like compounds
Latest 2024 TRI data shows land as the largest reported pathway for this chemical at the facility.
Enforcement layer
Why the ECHO-style detail matters
Violation Identified across 3 of the last 12 quarters in the imported ECHO record.