# PHMSA Hazmat Incident I-1994031059 — CHLORODIFLUOROMETHANE OR REFRIGERANT GAS R 22 — FREMONT, CA

**Citation:** PHMSA Hazmat Incident I-1994031059  
**Type / status:** incident / historical  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** 1994-01-30  
**Published:** Not stated

Serious reporter-submitted hazardous materials transportation incident on 1994-01-30 in FREMONT, CA.

## Document text

PHMSA hazardous materials incident report I-1994031059.
Incident date: 1994-01-30.
Location: FREMONT, CA.
Mode: Rail.
Carrier/reporter: UNION PACIFIC RAILROAD CO.
Shipper: A P L.
Materials: UN1018; CHLORODIFLUOROMETHANE OR REFRIGERANT GAS R 22; hazard class 2.2; 3.5 LGA released | UN1760; CORROSIVE LIQUIDS, N.O.S.; hazard class 8; 55 LGA released | UN1760; CORROSIVE LIQUIDS, N.O.S.; hazard class 8; 7 LGA released | UN1993; FLAMMABLE LIQUIDS, N.O.S.; hazard class 3; 220 LGA released | UN1993; FLAMMABLE LIQUIDS, N.O.S.; hazard class 3; 6 LGA released | UN1993; FLAMMABLE LIQUIDS, N.O.S.; hazard class 3; 70 LGA released | UN1993; FLAMMABLE LIQUIDS, N.O.S.; hazard class 3; 80 LGA released | UN2831; 1,1,1-TRICHLOROETHANE; hazard class 6.1; 36.25 LGA released | UN2922; CORROSIVE LIQUIDS, POISONOUS, N.O.S.; hazard class 8; 91 LGA released.
How failed: Burst or Ruptured; Cracked; Crushed; Punctured; Ripped or Torn.
Reported failure causes: Derailment / Derailment; Derailment; Fire, Temperature, or Heat; Rollover Accident.
Reported result: Spillage, Fire, Material Entered Waterway/Storm Sewer.
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: `bd9f9120b45f395b9d9d897bd368dd925568a1d2641e4e8c1f6c69969e526113`
- Retrieved: 2026-08-13T12:55:56.545Z
- Exported: 2026-08-26T01:49:53.330Z
- Document slug: `phmsa-hazmat-incident-i-1994031059`

### Source metadata

```json
{
  "materialSubtype": "phmsa_hazmat_serious_incident",
  "reportNumber": "I-1994031059",
  "operatorReported": true,
  "serious": true,
  "finalAgencyFinding": false,
  "eventDescriptionExcluded": true,
  "publicPdfUrl": null,
  "rowCount": 9,
  "carrierReporterNames": [
    "UNION PACIFIC RAILROAD CO"
  ],
  "shipperNames": [
    "A P L"
  ],
  "routes": [
    "37847 SHINN ST MP29"
  ],
  "cities": [
    "FREMONT"
  ],
  "states": [
    "CA"
  ],
  "originCities": [
    "ATLANTA"
  ],
  "modes": [
    "Rail"
  ],
  "materials": [
    {
      "identificationNumber": "UN1018",
      "commodityName": "CHLORODIFLUOROMETHANE OR REFRIGERANT GAS R 22",
      "hazardousClass": "2.2",
      "quantityReleased": "3.5",
      "unitOfMeasure": "LGA"
    },
    {
      "identificationNumber": "UN1760",
      "commodityName": "CORROSIVE LIQUIDS, N.O.S.",
      "hazardousClass": "8",
      "quantityReleased": "55",
      "unitOfMeasure": "LGA"
    },
    {
      "identificationNumber": "UN1760",
      "commodityName": "CORROSIVE LIQUIDS, N.O.S.",
      "hazardousClass": "8",
      "quantityReleased": "7",
      "unitOfMeasure": "LGA"
    },
    {
      "identificationNumber": "UN1993",
      "commodityName": "FLAMMABLE LIQUIDS, N.O.S.",
      "hazardousClass": "3",
      "quantityReleased": "220",
      "unitOfMeasure": "LGA"
    },
    {
      "identificationNumber": "UN1993",
      "commodityName": "FLAMMABLE LIQUIDS, N.O.S.",
      "hazardousClass": "3",
      "quantityReleased": "6",
      "unitOfMeasure": "LGA"
    },
    {
      "identificationNumber": "UN1993",
      "commodityName": "FLAMMABLE LIQUIDS, N.O.S.",
      "hazardousClass": "3",
      "quantityReleased": "70",
      "unitOfMeasure": "LGA"
    },
    {
      "identificationNumber": "UN1993",
      "commodityName": "FLAMMABLE LIQUIDS, N.O.S.",
      "hazardousClass": "3",
      "quantityReleased": "80",
      "unitOfMeasure": "LGA"
    },
    {
      "identificationNumber": "UN2831",
      "commodityName": "1,1,1-TRICHLOROETHANE",
      "hazardousClass": "6.1",
      "quantityReleased": "36.25",
      "unitOfMeasure": "LGA"
    },
    {
      "identificationNumber": "UN2922",
      "commodityName": "CORROSIVE LIQUIDS, POISONOUS, N.O.S.",
      "hazardousClass": "8",
      "quantityReleased": "91",
      "unitOfMeasure": "LGA"
    }
  ],
  "packages": [
    {
      "identificationMarkings": null,
      "outerMaterial": null,
      "outerType": null,
      "outerCapacity": "0.65625",
      "outerCapacityUnit": "LGA",
      "outerShipmentCount": "12",
      "outerFailedCount": "6",
      "innerMaterial": null,
      "innerType": null,
      "innerCapacity": "0.054688",
      "innerCapacityUnit": "LGA",
      "innerShipmentCount": "144",
      "innerFailedCount": "64"
    },
    {
      "identificationMarkings": null,
      "outerMaterial": null,
      "outerType": null,
      "outerCapacity": "3",
      "outerCapacityUnit": "LGA",
      "outerShipmentCount": "15",
      "outerFailedCount": "13",
      "innerMaterial": null,
      "innerType": null,
      "innerCapacity": "0.25",
      "innerCapacityUnit": "LGA",
      "innerShipmentCount": "180",
      "innerFailedCount": "145"
    },
    {
      "identificationMarkings": null,
      "outerMaterial": null,
      "outerType": null,
      "outerCapacity": "35",
      "outerCapacityUnit": "LGA",
      "outerShipmentCount": "2",
      "outerFailedCount": "2",
      "innerMaterial": null,
      "innerType": null,
      "innerCapacity": "0",
      "innerCapacityUnit": null,
      "innerShipmentCount": "0",
      "innerFailedCount": "0"
    },
    {
      "identificationMarkings": null,
      "outerMaterial": null,
      "outerType": null,
      "outerCapacity": "4",
      "outerCapacityUnit": "LGA",
      "outerShipmentCount": "42",
      "outerFailedCount": "2",
      "innerMaterial": null,
      "innerType": null,
      "innerCapacity": "1",
      "innerCapacityUnit": "LGA",
      "innerShipmentCount": "169",
      "innerFailedCount": "6"
    },
    {
      "identificationMarkings": null,
      "outerMaterial": null,
      "outerType": null,
      "outerCapacity": "5",
      "outerCapacityUnit": "LGA",
      "outerShipmentCount": "16",
      "outerFailedCount": "16",
      "innerMaterial": null,
      "innerType": null,
      "innerCapacity": "0",
      "innerCapacityUnit": null,
      "innerShipmentCount": "0",
      "innerFailedCount": "0"
    },
    {
      "identificationMarkings": null,
      "outerMaterial": null,
      "outerType": null,
      "outerCapacity": "55",
      "outerCapacityUnit": "LGA",
      "outerShipmentCount": "1",
      "outerFailedCount": "1",
      "innerMaterial": null,
      "innerType": null,
      "innerCapacity": "0",
      "innerCapacityUnit": null,
      "innerShipmentCount": "0",
      "innerFailedCount": "0"
    },
    {
      "identificationMarkings": null,
      "outerMaterial": null,
      "outerType": null,
      "outerCapacity": "55",
      "outerCapacityUnit": "LGA",
      "outerShipmentCount": "4",
      "outerFailedCount": "4",
      "innerMaterial": null,
      "innerType": null,
      "innerCapacity": "0",
      "innerCapacityUnit": null,
      "innerShipmentCount": "0",
      "innerFailedCount": "0"
    },
    {
      "identificationMarkings": null,
      "outerMaterial": null,
      "outerType": null,
      "outerCapacity": "7",
      "outerCapacityUnit": "LGA",
      "outerShipmentCount": "1",
      "outerFailedCount": "1",
      "innerMaterial": null,
      "innerType": null,
      "innerCapacity": "0",
      "innerCapacityUnit": null,
      "innerShipmentCount": "0",
      "innerFailedCount": "0"
    },
    {
      "identificationMarkings": null,
      "outerMaterial": null,
      "outerType": null,
      "outerCapacity": "7",
      "outerCapacityUnit": "LGA",
      "outerShipmentCount": "15",
      "outerFailedCount": "13",
      "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"
}
```