EPA TRI Facility · Petroleum
Diamond Shamrock Refining Co LP
Sunray, TX · Parent: Valero Energy Corp
- Total releases
- 5.3M lbs
- Chemicals reported
- 44
- Carcinogens
- 15
- Primary pathway
- Land Disposal
LAND Form-R mix
Diamond Shamrock Refining Co LP: how the 5.3M lbs splits
5.3M lbs across all reported pathways
- Land Disposal 4.0M lbs 77.0%
- Air Releases 1.1M lbs 20.8%
- Off-site Transfers 118.0K lbs 2.2%
- Water Discharges 1.9K lbs <0.1%
Diamond Shamrock Refining Co LP's 5.3M lbs Form-R total is LAND - land disposal is 77.0% of the bar. Next segment: air releases at 20.8%. Leading chemical by pounds: Ammonia.
Carcinogen-classified pounds vs other reported pounds
Same cumulative TRI total as above, split by EPA/IARC carcinogen classification on each chemical: pounds share, not chemical count. Classification is not a site health-risk score.
HEAVY volume LAND pathway CARC-LEAN
Diamond Shamrock Refining Co LP is an EPA Toxics Release Inventory reporter in Sunray, TX, in the petroleum sector. It reported 1.6M lbs of releases across 37 chemicals in 2023, and 5.3M lbs in total across its 2019-2023 reporting years. That ranks 408 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In Texas's 2,016 reporting TRI sites, pounds #1 is not chemical-count #1. Diamond Shamrock Refining Co LP is pounds #42 and chemical-count #26 at 5.3M lbs. Ascend Performance Materials-Chocolate Bayou Plant leads reported pounds (94.0M lbs) at 36 chemicals (chemical-count #35). Veolia Es Technical Solutions LLC Port Arthur Facility leads chemical count at 246 chemicals (1.5M lbs, pounds #112). Reported volume rose against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Valero Partners McKee; Continental Carbon Co Sunray; Etc Texas Pipeline Ltd. Sunray Gas Plant; Jbs Swift Cactus. Similar-scale Petroleum peers outside Texas: Martinez Refining Co LLC; Tesoro Los Angeles Refinery-Carson Operations; Ergon Refining Inc; Exxonmobil Oil Corp Joliet Refinery. Other Valero Energy Corp sites in this extract: Valero Refining - Texas L.P. Houston Refinery; Valero Refining-Texas LP; Valero Refining-Texas LP Corpus Christi West Plant; Premcor Refining Group Inc Port Arthur. Largest disclosed chemicals by pounds: Ammonia; tert-Butyl alcohol; Methanol; Toluene.
Diamond Shamrock Refining Co LP stamps HEAVY volume with a dominant LAND pathway (77.0% land disposal) across 44 chemicals · 15 carcinogen-classified. Cumulative Form-R extract: 5.3M lbs (2019–2023). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Martinez Refining Co LLC and Tesoro Los Angeles Refinery-Carson Operations.
Diamond Shamrock Refining Co LP vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
5.3M lbs Top 2% higher than 98% of 25,986 reporting TRI facilities
Each bar is a $1M-wide band; taller bars hold more reporting TRI facilities. The dashed line and filled bar mark this facility. Hover, focus, or tap a bar for its full count, share, and position.
Source U.S. Environmental Protection Agency, Toxics Release Inventory · 2023 reporting year
Diamond Shamrock Refining Co LP inside Moore's TRI pounds
Among the 902 Petroleum facilities in this database, Diamond Shamrock Refining Co LP reports the 19th-largest volume, placing it in the top 2.1% of its sector. This one site accounts for 84.1% of every pound reported in Moore. Scale peers outside Texas include Martinez Refining Co LLC and Tesoro Los Angeles Refinery-Carson Operations.
County-dominant here means ≥25% of Moore's reported pounds (6.3M lbs county total). Shares only print when the site reports ≥1,000 lbs.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Diamond Shamrock Refining Co LP's total reported releases rose from 973.4 thousand lb in 2022 to 1.6 million lb in 2023, based on EPA TRI filings.
- Diamond Shamrock Refining Co LP's off-site transfers rose from 5.1 thousand lb in 2022 to 18.2 thousand lb in 2023, based on EPA TRI filings.
- Diamond Shamrock Refining Co LP's land releases rose from 749.3 thousand lb in 2022 to 1.3 million lb in 2023, based on EPA TRI filings.
- Diamond Shamrock Refining Co LP's water releases rose from 300 lb in 2022 to 506 lb in 2023, based on EPA TRI filings.
Diamond Shamrock Refining Co LP Form-R facts
Compare this facility
See how Diamond Shamrock Refining Co LP stacks up against nearby facilities and the typical reporter.
48.2× more than the comparison
2.2× more than the comparison
Comparison reflects reported pounds and chemical counts, not toxicity or health risk. Averages cover facilities reporting any release.
How does this facility release toxic chemicals?
How Diamond Shamrock Refining Co LP releases toxic chemicals into the environment. Total: 5.3M lbs.
Emissions Trend Summary
From 2019 to 2023, total releases increased by 88% (828.2K lbs to 1.6M lbs).
Diamond Shamrock Refining Co LP: annual Form-R pounds
HEAVY site · LAND pathway · TRI years 2019–2023
- 2019
- 2020
- 2021
- 2022
- 2023
What this shows Diamond Shamrock Refining Co LP year-over-year reported totals (increased by 88% from 2019 to 2023). TRI figures are self-reported estimates and can swing with production, waste handling, and reporting changes, not only with controls. Lead chemical in the extract: Ammonia.
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 828.2K lbs | 38 |
| 2020 | 912.2K lbs | 36 |
| 2021 | 983.1K lbs | 36 |
| 2022 | 973.4K lbs | 37 |
| 2023 | 1.6M lbs | 37 |
Chemical Releases
Aggregated across all reporting years (2019–2023). 15 of 44 chemicals are carcinogens. Sorted by total release volume.
Diamond Shamrock Refining Co LP · LAND-pathway site
Nearest TRI Facilities to Diamond Shamrock Refining Co LP
Closest other reporters in Texas - including Valero Partners McKee, Continental Carbon Co Sunray, Etc Texas Pipeline Ltd. Sunray Gas Plant, ordered by distance.
Showing 8 of 2,015 other reporting facilities in Texas.
Similar Petroleum Facilities
Other Petroleum facilities with similar total release volumes (±80%), outside Texas - e.g. Martinez Refining Co LLC, Tesoro Los Angeles Refinery-Carson Operations, Ergon Refining Inc.
Compare beyond Texas
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Diamond Shamrock Refining Co LP on cumulative reported pounds (5.3M lbs) and distinct chemical count (44). Release-pound peers include Asarco LLC Ray Mine Operations, Vibrantz Specialty Products LLC, Thomas Hill Energy Center. Chemical-count peers include Valero Refining Co - Tennessee L.L.C., Basf Corp, Clean Harbors Grassy Mountain LLC. Neighborhoods are forced disjoint so each axis surfaces a different set of sites.
Similar reported release pounds
Nearest out-of-state reporters (≥1,000 lbs) by absolute TRI pounds, not same-industry or same-county neighbors.
- Asarco LLC Ray Mine Operations Kearny, AZ · Metal Mining 5.3M lbs reported
- Vibrantz Specialty Products LLC Baltimore, MD · Chemicals 5.3M lbs reported
- Thomas Hill Energy Center Clifton Hill, MO · Electric Utilities 5.3M lbs reported
- Clean Harbors Deer Trail Llc. Deer Trail, CO · Hazardous Waste 5.2M lbs reported
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
Other Valero Energy Corp Facilities
Same-parent TRI sites ranked by reported releases - including Valero Refining - Texas L.P. Houston Refinery, Valero Refining-Texas LP, Valero Refining-Texas LP Corpus Christi West Plant.
About TRI Data
Data as of 2023 reporting year. Source: U.S. Environmental Protection Agency (EPA) Toxic Release Inventory.
On this page the largest disclosed chemicals include Ammonia, tert-Butyl alcohol, Methanol, Toluene; nearby reporters include Valero Partners McKee. Diamond Shamrock Refining Co LP stamps HEAVY volume · LAND pathway · CARC-LEAN carcinogen-lbs on this Form-R extract. Totals are self-reported estimates under EPCRA §313, not measured stack emissions or a health-risk score.
Use and verify this record
This Diamond Shamrock Refining Co LP TRI extract (HEAVY · LAND · CARC-LEAN · lead Ammonia) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Diamond Shamrock Refining Co LP totals are self-reported EPCRA §313 estimates for Sunray, TX, latest year 2023. Form-R rows span 2019–2023 (5 years). NAICS 324110 · Petroleum. 84.1% of Moore TRI pounds in this extract. Nearest ABS peer: Asarco LLC Ray Mine Operations (Δ 2.6K lbs). Pounds ≠ exposure.
Diamond Shamrock Refining Co LP stamps HEAVY volume · LAND pathway · CARC-LEAN · lead Ammonia. PlainEnviro renders this EPA Form-R extract from its pipeline; no figure is typed in by an editor. Corrections: editorial policy.
All federal data sources used on this page
- EPA Toxics Release Inventory (TRI) Basic Data Files - annual self-reported chemical-release filings. epa.gov
- EPA TRI Program reference - how chemicals and reported releases are counted. epa.gov
- EPA Facility Registry Service - facility location and identity. epa.gov
- EPA ECHO - regulatory and compliance context. epa.gov
- EPA Envirofacts - the EPA data warehouse exposing these datasets. epa.gov