EPA TRI Facility · Natural Gas Processing
San Martin Plant
Elmendorf, TX · Parent: Enterprise Products Operating LLC
- Total releases
- 16.3K lbs
- Chemicals reported
- 8
- Carcinogens
- 2
- Primary pathway
- Off-site Transfers
Reported-total composition
How the reported total is distributed
16.3K lbs across all reported pathways
- Off-site Transfers 13.6K lbs 83.8%
- Air Releases 2.6K lbs 16.2%
The segments reconcile to the cumulative total shown above. Off-site transfers are shown separately from releases to air, water, and land.
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 OFFSITE pathway CARC-LEAN
San Martin Plant is an EPA Toxics Release Inventory reporter in Elmendorf, TX, in the natural gas processing sector. It reported 3.9K lbs of releases across 8 chemicals in 2023, and 16.3K lbs in total across its 2022-2023 reporting years. That ranks 8,707 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. San Martin Plant is pounds #842 and chemical-count #405 at 16.3K 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 fell against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Lubrizol Corp; Arconic Inc San Antonio Works; Blue Wing Rm; Vp Racing Fuels Inc.. Similar-scale Natural Gas Processing peers outside Texas: Chisholm Trail Gas Complex; Dcp Midstream Lp/okarche Plant; Sherwood Plant; Lancaster Gas Processing Plant. Other Enterprise Products Operating LLC sites in this extract: Enterprise Products Operating LLC; Chaco Gas Plant; East Storage / Splitter III Facility; Enterprise Products Operating LLC Baton Rouge Fractionator. Largest disclosed chemicals by pounds: n-Hexane; Cyclohexane; Benzene; Toluene.
San Martin Plant has reported 16.3K lbs of toxic releases across 8 chemicals to the EPA Toxic Release Inventory, based on annual facility disclosures from 2019 through 2023. Of the chemicals reported, 2 are classified as carcinogens, representing 25% of the facility's chemical profile. The facility operates in the Natural Gas Processing sector. The primary release pathway is off-site transfers, accounting for 84% of total releases. All release data shown below is self-reported to the EPA under the Emergency Planning and Community Right-to-Know Act (EPCRA) Section 313.
San Martin Plant vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
16K lbs Top 34% higher than 66% 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
Where this facility sits in the TRI record
Among the 339 Natural Gas Processing facilities in this database, San Martin Plant reports the 188th-largest volume (16.3K lbs). Its reported volume is concentrated rather than spread: n-Hexane alone is 73.6% of the total.
Placement is computed from reported TRI pounds in this database. Thresholds are fixed across every facility page: concentrated ≥60% of volume in one chemical, county-dominant ≥25% of the county total, carcinogen-heavy ≥50% of pounds. Share-based statements are shown only for sites reporting at least 1,000 lbs, because a share of a very small total is not a meaningful signal. Reported pounds are self-reported estimates and do not measure toxicity or health risk.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- San Martin Plant's total reported releases fell from 12.3 thousand lb in 2022 to 3.9 thousand lb in 2023, based on EPA TRI filings.
- San Martin Plant's chemicals reported rose from 4 in 2022 to 8 in 2023, based on EPA TRI filings.
- San Martin Plant's off-site transfers fell from 11.3 thousand lb in 2022 to 2.3 thousand lb in 2023, based on EPA TRI filings.
- San Martin Plant's air releases rose from 1.0 thousand lb in 2022 to 1.6 thousand lb in 2023, based on EPA TRI filings.
Quick Facts
Compare this facility
See how San Martin Plant stacks up against nearby facilities and the typical reporter.
83% less than the comparison
69% 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 San Martin Plant releases toxic chemicals into the environment. Total: 16.3K lbs.
Emissions Trend Summary
From 2022 to 2023, total releases decreased by 68% (12.3K lbs to 3.9K lbs).
Reported total releases by year
San Martin Plant - annual TRI totals
- 2022 0
- 2023 0
What this shows Year-over-year reported totals. TRI figures are self-reported estimates and can swing with production levels, waste-rock handling and reporting changes, not only with emissions controls.
| Year | Total | Chemicals |
|---|---|---|
| 2022 | 12.3K lbs | 4 |
| 2023 | 3.9K lbs | 8 |
Chemical Releases
Aggregated across all reporting years (2022–2023). 2 of 8 chemicals are carcinogens. Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| n-Hexane | 12.0K lbs | - |
| Cyclohexane | 1.9K lbs | - |
| Benzene | 1.5K lbs | Carcinogen |
| Toluene | 800 lbs | - |
| Ethylbenzene | 28 lbs | Carcinogen |
| m-Xylene | 21 lbs | - |
| p-Xylene | 10 lbs | - |
| o-Xylene | 0 lbs | - |
Location
Nearest TRI Facilities to San Martin Plant
Closest other reporters in Texas - including Lubrizol Corp, Arconic Inc San Antonio Works, Blue Wing Rm, ordered by distance.
Showing 8 of 2,015 other reporting facilities in Texas.
Similar Natural Gas Processing Facilities
Other Natural Gas Processing facilities with similar total release volumes (±80%), outside Texas - e.g. Chisholm Trail Gas Complex, Dcp Midstream Lp/okarche Plant, Sherwood Plant.
Compare beyond Texas
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest San Martin Plant on cumulative reported pounds (16.3K lbs) and distinct chemical count (8). Release-pound peers include Dimension-Polyant Inc., Hillyard Industries Inc, Schiller Station. Chemical-count peers include Prepa-South Coast Power Plant, Argos Puerto Rico Corp., US Tsubaki Automotive 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.
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
Other Enterprise Products Operating LLC Facilities
Same-parent TRI sites ranked by reported releases - including Enterprise Products Operating LLC, Chaco Gas Plant, East Storage / Splitter III Facility.
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, Cyclohexane, Benzene, Toluene; nearby reporters include Lubrizol Corp. San Martin Plant stamps LIGHT volume · OFFSITE 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 San Martin Plant record combines EPA TRI filings, facility identity, and compliance context without turning reported releases into a health-risk rating.
TRI release totals are self-reported estimates, not measured stack emissions. The methodology explains how records are joined, computed, and refreshed.
PlainEnviro renders public EPA records directly from its data pipeline; no figure on this page is typed in by an editor. See the editorial standards and corrections policy for how source changes and reported errors are handled.
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