On January 18, 2017, PHMSA published an advance notice of proposed rulemaking (ANPRM) titled, “Hazardous Materials: Volatility of Unrefined Petroleum Products and Class 3 Materials,” addressing the ...

Advance notice of proposed rulemaking (ANPRM). PHMSA is considering revising the Hazardous Materials Regulations (HMR) to establish vapor pressure limits for unrefined petroleum-based products and ...