Tesoro Refining & Marketing Company LLC - Slc – Emissions Trend
Salt Lake City, UT · 2019–2023 · Parent: Tesoro Corp
This page assembles 5 consecutive years of EPA Toxics Release Inventory Form R filings for Tesoro Refining & Marketing Company LLC - Slc, spanning 2019–2023. Each annual total aggregates on-site air emissions, surface-water discharges, land disposal, and off-site transfers reported by the facility under EPCRA Section 313, which requires disclosure whenever a listed chemical is manufactured, processed, or otherwise used above threshold quantities.
Reported releases opened at 127.7K in 2019 and closed at 127.6K in 2023 – a flat trend of 0.1% over the window. The chart below stacks the four TRI release media (air, water, land, off-site) and overlays the yearly total. The top contributor by cumulative mass is Ammonia at 122.0K, followed by Toluene at 104.1K.
Because TRI figures are estimated, not metered, year-over-year deltas can reflect methodology revisions, ownership changes, or shifts in what a facility classifies as reportable, not only physical emission changes. Treat the trajectory as a disclosure record, and cross-reference with the EPA Enforcement and Compliance History Online (ECHO) system for the fuller regulatory picture on this petroleum facility.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Tesoro Refining & Marketing Company LLC - Slc's total reported releases fell from 141.3 thousand lb in 2022 to 127.6 thousand lb in 2023, based on EPA TRI filings.
- Tesoro Refining & Marketing Company LLC - Slc's land releases fell from 594 lb in 2022 to 388 lb in 2023, based on EPA TRI filings.
- Tesoro Refining & Marketing Company LLC - Slc's off-site transfers fell from 20.1 thousand lb in 2022 to 16.5 thousand lb in 2023, based on EPA TRI filings.
- Tesoro Refining & Marketing Company LLC - Slc's air releases fell from 120.5 thousand lb in 2022 to 110.7 thousand lb in 2023, based on EPA TRI filings.
Total Releases by Category
Year-over-Year Comparison
| Year | Total | Chemicals | YoY Change |
|---|---|---|---|
| 2019 | 127.7K lbs | 30 | - |
| 2020 | 142.9K lbs | 28 | +11.8% |
| 2021 | 129.3K lbs | 31 | -9.5% |
| 2022 | 141.3K lbs | 29 | +9.3% |
| 2023 | 127.6K lbs | 31 | -9.7% |
Top Chemicals by Year
| Chemical | 2019 | 2020 | 2021 | 2022 | 2023 | Total |
|---|---|---|---|---|---|---|
| Ammonia | 21.0K | 29.2K | 21.2K | 20.9K | 29.6K | 122.0K |
| Toluene | 25.0K | 25.2K | 24.3K | 20.2K | 9.4K | 104.1K |
| n-Hexane | 13.6K | 20.3K | 20.2K | 27.9K | 16.1K | 98.1K |
| Hydrogen sulfide | 13.3K | 13.4K | 14.4K | 12.4K | 25.6K | 79.1K |
| Xylene (mixed isomers) | 10.2K | 12.2K | 12.4K | 15.6K | 8.4K | 58.9K |
| Hydrogen cyanide | 8.3K | 7.6K | 8.7K | 8.7K | 8.7K | 42.0K |
| Propylene | 14.3K | 12.3K | 1.9K | 2.5K | 2.4K | 33.5K |
| Benzene | 5.9K | 5.7K | 5.8K | 6.6K | 6.6K | 30.5K |
| Cyclohexane | 2.5K | 4.2K | 4.3K | 8.1K | 3.4K | 22.4K |
| Ethylene | 3.8K | 4.4K | 3.8K | 3.9K | 3.7K | 19.8K |
| Lead compounds | 2.8K | 1.1K | 1.7K | 7.7K | 5.8K | 19.0K |
| 1,2,4-Trimethylbenzene | 1.9K | 2.1K | 2.1K | 2.4K | 1.9K | 10.3K |
| Cumene | 765 | 3.0K | 2.9K | 1.0K | 53 | 7.8K |
| Ethylbenzene | 1.1K | 1.0K | 1.1K | 1.5K | 950 | 5.7K |
| Zinc compounds | - | - | 1.7K | - | 1.8K | 3.5K |
About This Data
Trend data is sourced from the EPA Toxic Release Inventory (TRI). Facilities report annually. Release quantities are self-reported estimates. Year-over-year changes may reflect changes in production, pollution control measures, reporting methodology, or chemical thresholds.
A decrease in reported releases does not necessarily indicate improved environmental performance, as it may reflect production cutbacks, facility closures, or changes in reporting requirements. Similarly, increases may reflect expanded production rather than degraded environmental practices.
Frequently Asked Questions
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Read our methodology - how this data is sourced, computed, and verified.