# PHMSA Hazmat Incident I-2005090019 — SULFURIC ACID — EL CENTRO, CA

**Citation:** PHMSA Hazmat Incident I-2005090019  
**Type / status:** incident / historical  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 2005-07-21  
**Published:** Not stated

Serious reporter-submitted hazardous materials transportation incident on 2005-07-21 in EL CENTRO, CA.

## Document text

PHMSA hazardous materials incident report I-2005090019.
Incident date: 2005-07-21.
Location: EL CENTRO, CA.
Mode: Rail.
Carrier/reporter: UNION PACIFIC RAILROAD.
Shipper: TESORO REFINING MARKETING.
Materials: UN1830; SULFURIC ACID; hazard class 8; 500 LGA released.
What failed: Bolts or Nuts; Flange; Manway or Dome Cover; Pressure Relief Valve or Device - Non-Reclosing.
How failed: Leaked; Leaked.
Reported failure causes: Broken Component or Device; Broken Component or Device.
Reported result: Spillage, 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.

## Provenance

- Official: Yes
- Source: <https://portalpublic.phmsa.dot.gov/analytics/saw.dll?Portal?PortalPath=/shared/Public%20Website%20Pages/_portal/Hazmat%20Incident%20Report%20Search>
- Source ID: `phmsa-hazmat-incidents`
- SHA-256: `ad146354f82ac22beb7fbb36ed5b2b70591a2964b0a79f9a03d62adff4723054`
- Retrieved: 2026-08-13T12:55:56.545Z
- Exported: 2026-08-25T07:02:33.178Z
- Document slug: `phmsa-hazmat-incident-i-2005090019`

### Source metadata

```json
{
  "materialSubtype": "phmsa_hazmat_serious_incident",
  "reportNumber": "I-2005090019",
  "operatorReported": true,
  "serious": true,
  "finalAgencyFinding": false,
  "eventDescriptionExcluded": true,
  "publicPdfUrl": null,
  "rowCount": 1,
  "carrierReporterNames": [
    "UNION PACIFIC RAILROAD"
  ],
  "shipperNames": [
    "TESORO REFINING MARKETING"
  ],
  "routes": [
    "MILEPOST 697.60"
  ],
  "cities": [
    "EL CENTRO"
  ],
  "states": [
    "CA"
  ],
  "originCities": [],
  "modes": [
    "Rail"
  ],
  "materials": [
    {
      "identificationNumber": "UN1830",
      "commodityName": "SULFURIC ACID",
      "hazardousClass": "8",
      "quantityReleased": "500",
      "unitOfMeasure": "LGA"
    }
  ],
  "packages": [
    {
      "identificationMarkings": "DOT 111A100W4",
      "outerMaterial": null,
      "outerType": null,
      "outerCapacity": "13629",
      "outerCapacityUnit": "LGA",
      "outerShipmentCount": "1",
      "outerFailedCount": "1",
      "innerMaterial": null,
      "innerType": null,
      "innerCapacity": "0",
      "innerCapacityUnit": null,
      "innerShipmentCount": "0",
      "innerFailedCount": "0"
    }
  ],
  "reportingRuleContext": [
    "171.15",
    "171.16"
  ],
  "caveat": "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.",
  "privacyCaveat": "The public CSV excludes preparer contact fields. Event Description is intentionally excluded from normalized records and search output to reduce incidental personal-information risk.",
  "jurisdiction": "US"
}
```