# Dominion Energy — Hazardous Materials Safety Interpretation

**Citation:** 21-0098  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2022-07-26

21-0098 response to Dominion Energy concerning 171.8, 172.303.

## Document text

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## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/docs/standards-rulemaking/hazmat/interpretations/76626/210098.pdf>
- Source ID: `phmsa`
- SHA-256: `ebfbd57b281cd77005ae73cb497932385b93f0a5fdf257a23d8a294163be8c04`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-23T03:25:56.775Z
- Document slug: `phmsa-interpretation-21-0098`

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```