# PHMSA Hazmat Incident X-2021010475 — CARBON DIOXIDE, REFRIGERATED LIQUID — MONTPELIER, OH

- **operation:** document
- **citation:** PHMSA Hazmat Incident X-2021010475
- **title:** PHMSA Hazmat Incident X-2021010475 — CARBON DIOXIDE, REFRIGERATED LIQUID — MONTPELIER, OH
- **source type:** incident
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** historical
- **official:** true
- **published on:** Not available
- **effective on:** 2020-12-29
- **summary:** Serious reporter-submitted hazardous materials transportation incident on 2020-12-29 in MONTPELIER, OH.
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- **source url:** https://portal.phmsa.dot.gov/PDFGenerator/getPublicReport/OHMIR_5800-1-PUBLIC?INCIDENTID=w7BmDrDVBu1V0HX86CBLnw%3D%3D
**body:**

PHMSA hazardous materials incident report X-2021010475.
Incident date: 2020-12-29.
Location: MONTPELIER, OH.
Mode: Rail.
Carrier/reporter: NORFOLK SOUTHERN CORPORATION.
Shipper: Airgas USA LLC.
Materials: UN2187; CARBON DIOXIDE, REFRIGERATED LIQUID; hazard class 2.2; 59000 LGA released.
What failed: Frangible Disc.
How failed: Burst or Ruptured.
Reported failure causes: Over-pressurized.
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.
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