# CALUMET MONTANA REFINING, LLC — Warning Letter

**Citation:** CPF 520065022W  
**Type / status:** enforcement / historical  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2006-05-03

CLOSED warning letter citing 195.452(f)(8), 195.452(g)(4), 195.452(i)(3), 195.452(i)(4), 195.452(j)(2).

## Document text

Warning Letter involving CALUMET MONTANA REFINING, LLC. PHMSA's enforcement data identifies the cited regulations as 195.452(f)(8),  195.452(g)(4),  195.452(i)(3),  195.452(i)(4),  195.452(j)(2). The case was opened on 2006-05-03 and is reported as closed as of 2006-05-03. Open the official case record for notices, responses, orders, and the latest status.

PHMSA lists no public case documents for this record.

## Provenance

- Official: Yes
- Source: <https://primis.phmsa.dot.gov/enforcement-data/case/520065022W>
- Source ID: `phmsa-enforcement`
- SHA-256: `576dcc6f0c7317357896574a2a5f27b97b3c0a0412d0163600555dfa6cd1a0b5`
- Retrieved: 2026-08-20T04:44:44.458Z
- Exported: 2026-08-22T06:29:48.085Z
- Document slug: `phmsa-enforcement-520065022w`

### Source metadata

```json
{
  "cpf": "520065022W",
  "operator": "CALUMET MONTANA REFINING, LLC",
  "region": "Western",
  "pipelineType": "INTERSTATE LIQUID ONSHORE",
  "caseStatus": "CLOSED",
  "citedSections": [
    "195.452(f)(8)",
    "195.452(g)(4)",
    "195.452(i)(3)",
    "195.452(i)(4)",
    "195.452(j)(2)"
  ],
  "dataAsOf": "08/04/2026 12PM",
  "caseDataAsOf": "2026-08-04",
  "attachmentCount": 0,
  "attachments": [],
  "extractedAgencyDocumentCount": 0,
  "attachmentPolicy": "Official attachment links are retained. Agency-issued documents may also include a verified local PDF and page-level text representation.",
  "jurisdiction": "US",
  "operatorName": "CALUMET MONTANA REFINING, LLC"
}
```