EPA TRI Facility · Natural Gas Processing
Vermillion Gas Plant
Rock Springs, WY · Parent: Marathon Petroleum Corp
- Total releases
- 32.6K lbs
- Chemicals reported
- 7
- Carcinogens
- 3
- Primary pathway
- Air Releases
AIR Form-R mix
Vermillion Gas Plant: how the 32.6K lbs splits
32.6K lbs across all reported pathways
- Air Releases 32.4K lbs 99.4%
- Off-site Transfers 208 lbs 0.6%
Vermillion Gas Plant's 32.6K lbs Form-R total is AIR - air releases is 99.4% of the bar. Next segment: off-site transfers at 0.6%. Leading chemical by pounds: n-Hexane.
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.
LIGHT volume AIR pathway CARC-LEAN
Vermillion Gas Plant is an EPA Toxics Release Inventory reporter in Rock Springs, WY, in the natural gas processing sector. It reported 23.9K lbs of releases across 5 chemicals in 2023, and 32.6K lbs in total across its 2022-2023 reporting years. That ranks 7,108 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In Wyoming's 70 reporting TRI sites, pounds #1 is not chemical-count #1. Vermillion Gas Plant is pounds #30 and chemical-count #21 at 32.6K lbs. Dyno Nobel Inc-Cheyenne Plant leads reported pounds (27.1M lbs) at 8 chemicals (chemical-count #19). Hf Sinclair Parco Refining LLC leads chemical count at 36 chemicals (1.5M lbs, pounds #10). Reported volume rose against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Simplot Phosphates LLC; Pacificorp Jim Bridger Plant & Bridger Coal Co; Black Butte Coal Co; Lewis & Lewis Inc Asphalt Paving. Similar-scale Natural Gas Processing peers outside Wyoming: Cowtown Gas Processing Plant; Bear Creek Gas Plant; Williams Mobile Bay Gas Processing Facility; Aux Sable Liquid Products Inc. Other Marathon Petroleum Corp sites in this extract: Blanchard Refining Co LLC; Marathon Petroleum Co LP; Marathon Mandan Refinery; Catlettsburg Refining LLC. Largest disclosed chemicals by pounds: n-Hexane; Xylene (mixed isomers); Toluene; Benzene.
Vermillion Gas Plant stamps LIGHT volume with a dominant AIR pathway (99.4% air releases) across 7 chemicals · 3 carcinogen-classified. Cumulative Form-R extract: 32.6K lbs (2022–2023). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Cowtown Gas Processing Plant and Bear Creek Gas Plant.
Vermillion Gas Plant vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
33K lbs Top 27% higher than 73% 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
Vermillion Gas Plant: n-Hexane-led volume
Among the 339 Natural Gas Processing facilities in this database, Vermillion Gas Plant reports the 136th-largest volume (32.6K lbs). Its reported volume is concentrated rather than spread: n-Hexane alone is 62.3% of the total. Scale peers outside Wyoming include Cowtown Gas Processing Plant and Bear Creek Gas Plant.
Concentrated means ≥60% of Vermillion Gas Plant's pounds in one chemical - here n-Hexane at 62.3%. Not a toxicity score.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Vermillion Gas Plant's total reported releases rose from 8.7 thousand lb in 2022 to 23.9 thousand lb in 2023, based on EPA TRI filings.
- Vermillion Gas Plant's off-site transfers rose from 33 lb in 2022 to 175 lb in 2023, based on EPA TRI filings.
- Vermillion Gas Plant's air releases rose from 8.7 thousand lb in 2022 to 23.7 thousand lb in 2023, based on EPA TRI filings.
- Vermillion Gas Plant's chemicals reported rose from 4 in 2022 to 5 in 2023, based on EPA TRI filings.
Vermillion Gas Plant Form-R facts
Compare this facility
See how Vermillion Gas Plant stacks up against nearby facilities and the typical reporter.
100% less than the comparison
70% less 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 Vermillion Gas Plant releases toxic chemicals into the environment. Total: 32.6K lbs.
Emissions Trend Summary
From 2022 to 2023, total releases increased by 174% (8.7K lbs to 23.9K lbs).
Vermillion Gas Plant: annual Form-R pounds
LIGHT site · AIR pathway · TRI years 2022–2023
- 2022 0
- 2023 0
What this shows Vermillion Gas Plant year-over-year reported totals (increased by 174% from 2022 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: n-Hexane.
| Year | Total | Chemicals |
|---|---|---|
| 2022 | 8.7K lbs | 4 |
| 2023 | 23.9K lbs | 5 |
Chemical Releases
Aggregated across all reporting years (2022–2023). 3 of 7 chemicals are carcinogens. Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| n-Hexane | 20.3K lbs | - |
| Xylene (mixed isomers) | 5.5K lbs | - |
| Toluene | 3.4K lbs | - |
| Benzene | 3.4K lbs | Carcinogen |
| Cyclohexane | 0 lbs | - |
| 1,3-Butadiene | 0 lbs | Carcinogen |
| Naphthalene | 0 lbs | Carcinogen |
Vermillion Gas Plant · AIR-pathway site
Nearest TRI Facilities to Vermillion Gas Plant
Closest other reporters in Wyoming - including Simplot Phosphates LLC, Pacificorp Jim Bridger Plant & Bridger Coal Co, Black Butte Coal Co, ordered by distance.
Showing 8 of 69 other reporting facilities in Wyoming.
Similar Natural Gas Processing Facilities
Other Natural Gas Processing facilities with similar total release volumes (±80%), outside Wyoming - e.g. Cowtown Gas Processing Plant, Bear Creek Gas Plant, Williams Mobile Bay Gas Processing Facility.
Compare beyond Wyoming
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Vermillion Gas Plant on cumulative reported pounds (32.6K lbs) and distinct chemical count (7). Release-pound peers include Publix Super Markets Inc Dacula Facility, Air Products West Coast Hydrogen LLC - Torrance, Warren Oil Co LLC - West Memphis Ar. Chemical-count peers include Hubbell Caribe Ltd, Celanese Microcircuits Industries Ltd., Virgin Islands Water & Power Authority. 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.
- Publix Super Markets Inc Dacula Facility Dacula, GA · Food 32.6K lbs reported
- Air Products West Coast Hydrogen LLC - Torrance Torrance, CA · Chemicals 32.6K lbs reported
- Warren Oil Co LLC - West Memphis Ar West Memphis, AR · Petroleum 32.5K lbs reported
- US Army Donnelly Training Area Ranges Delta Junction, AK · Other 32.5K lbs reported
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
Other Marathon Petroleum Corp Facilities
Same-parent TRI sites ranked by reported releases - including Blanchard Refining Co LLC, Marathon Petroleum Co LP, Marathon Mandan Refinery.
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 n-Hexane, Xylene (mixed isomers), Toluene, Benzene; nearby reporters include Simplot Phosphates LLC. Vermillion Gas Plant stamps LIGHT volume · AIR 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 Vermillion Gas Plant TRI extract (LIGHT · AIR · CARC-LEAN · lead n-Hexane) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Vermillion Gas Plant totals are self-reported EPCRA §313 estimates for Rock Springs, WY, latest year 2023. Form-R rows span 2022–2023 (2 years). NAICS 211130 · Natural Gas Processing. 0.2% of Sweetwater TRI pounds in this extract. Nearest ABS peer: Publix Super Markets Inc Dacula Facility (Δ 11 lbs). Pounds ≠ exposure.
Vermillion Gas Plant stamps LIGHT volume · AIR pathway · CARC-LEAN · lead n-Hexane. 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