PHMSA Hazmat Incident X-2025081288 — ARGON, REFRIGERATED LIQUID (CRYOGENIC LIQUID) — VERNON, CA

Current as of 2025-08-05 Government source

Pipeline and Hazardous Materials Safety AdministrationOfficial agency material

View source

Incident X-2025081288PHMSA hazardous materials incident report X-2025081288. Incident date: 2025-08-05. Location: VERNON, CA. Mode: Rail. Carrier/reporter: UNION PACIFIC RAILROAD COMPANY. Shipper: Matheson Tri Gas. Materials: UN1951; ARGON, REFRIGERATED LIQUID (CRYOGENIC LIQUID); hazard class 2.2; 16000 LGA released. What failed: Sample Line. How failed: Leaked. Reported failure causes: Broken Component or Device. Reported result: Vapor(Gas) Dispersion. Reporter-submitted DOT Form 5800.1 data may be incomplete, corrected, supplemented, or misreported. A record, serious-incident classification, failure description, or relationship to a reporting rule is not a PHMSA causal finding, compliance determination, or finding of a violation.#

This material provides agency context. It does not replace binding regulatory text, and its legal effect depends on the underlying authority and facts.