# Michigan Public Service Commission — Pipeline Safety Interpretation

- **operation:** document
- **citation:** PI-18-0010
- **title:** Michigan Public Service Commission — Pipeline Safety Interpretation
- **source type:** guidance
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** guidance
- **official:** true
- **published on:** 2026-05-27
- **effective on:** Not available
- **summary:** PI-18-0010 response to Michigan Public Service Commission concerning 192.731.
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/phmsa-interpretation-pi-18-0010.json
- **markdown:** https://regulus.evalyn.ai/document/phmsa-interpretation-pi-18-0010.md
- **app url:** https://regulus.evalyn.ai/document/phmsa-interpretation-pi-18-0010
- **source url:** https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/2026-05/Michigan%20PUC_PI-18-0010_10-04-2018_192.731%28a%29_WITHDRAWAL_0.pdf
**body:**

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May 27, 2026
David Chislea
Manager, Gas Operations Section
Michigan Public Service Commission
7109 W. Saginaw
Lansing, MI 48917
Re: Withdrawal of Interpretation Letter PI-18-0010
Dear Mr. Chislea:
On October 4, 2018, PHMSA responded to your request for an interpretation of the federal
pipeline safety regulations in 49 CFR Part 192 regarding the inspection and testing of
compressor station relief valves under section 192.73l(a). This letter is to inform you that
PHMSA has withdrawn that response to further consider the matter.
If we can be of further assistance, please contact Joseph Berry at (720) 601-3577.
Sincerely,
Cameron Satterthwaite
Acting Director, Standards and Rulemaking
Division, Office of Pipeline Safety
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