{"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":null,"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":"<<<PAGE 1>>>\n\nMay 27, 2026\nDavid Chislea\nManager, Gas Operations Section\nMichigan Public Service Commission\n7109 W. Saginaw\nLansing, MI 48917\nRe: Withdrawal of Interpretation Letter PI-18-0010\nDear Mr. Chislea:\nOn October 4, 2018, PHMSA responded to your request for an interpretation of the federal\npipeline safety regulations in 49 CFR Part 192 regarding the inspection and testing of\ncompressor station relief valves under section 192.73l(a). This letter is to inform you that\nPHMSA has withdrawn that response to further consider the matter.\nIf we can be of further assistance, please contact Joseph Berry at (720) 601-3577.\nSincerely,\nCameron Satterthwaite\nActing Director, Standards and Rulemaking\nDivision, Office of Pipeline Safety","truncated":false,"body_characters":739}