Total reported releases 726k lb more than doubled year over year (+84%). Total releases concentrations have fallen 42% since 2010.
3400 E SECOND ST, Benicia, California · 324110 · Petroleum · operated by Valero Energy CORP
Nitrate compounds (water dissociable; reportable only when in aqueous solution) at Valero Refining Co-Cali Fornia Benicia Refinery have risen 56% since 2010 (through 2024).
n-Hexane releases at Valero Refining Co-Cali Fornia Benicia Refinery rose from 4k lb to 30k lb (7.7×) between 2023 and 2024.
Xylene (mixed isomers) releases at Valero Refining Co-Cali Fornia Benicia Refinery rose from 4k lb to 16k lb (4.1×) between 2023 and 2024.
Nitrate compounds (water dissociable; reportable only when in aqueous solution) releases at Valero Refining Co-Cali Fornia Benicia Refinery rose from 240k lb to 490k lb (2.0×) between 2023 and 2024.
Showing the 4 most editorially weighted signals out of 5. Lower-severity signals fold into the chemical breakdown and history charts below.
Nitrate compounds (water dissociable; reportable only when in aqueous solution) concentrations are up 56% since 2010.
Ammonia concentrations have more than halved since 2010.
n-Hexane concentrations have more than doubled since 2010.
Carbonyl sulfide concentrations are up 71% since 2010.
Toluene concentrations have fallen 32% since 2010.
Nickel compounds concentrations are up 27% since 2010.
Xylene (mixed isomers) concentrations have fallen 41% since 2010.
Methanol concentrations have more than halved since 2010.
Within 3 miles of this facility (16 Census block groups, population-weighted demographics): a population of 23,969. Why we surface this →
Low-income
People of color
Under age 5
Over age 64
Source: Census ACS 2018-2022 block-group demographics, population-weighted across the 3-mile buffer around this facility (from USEPA-clone/EJAM-open blockgroupstats). Indicator-level percentile and EJ-disparity scores are surfaced on the county page and the state page — they describe wider regional exposure burdens, not effects attributable to a single facility.
Source. EPA Toxics Release Inventory · retrieved 2026-05-07. Reporting year 2024. TRI is a federal public-domain dataset under 17 USC §105.
What this is not. TRI quantifies releases reported by the facility under EPCRA §313 — not ambient air or water concentrations measured at receptors. We do not attribute individual health outcomes to specific facilities; that exceeds what the data can support.