Significant Regulatory Guidance
Legacy ID
976
Show Effective Date
Off
Significant Regulatory Guidance
Yes
Approval of Phast v8.4 as an Alternate Model for Liquefied Natural Gas (LNG) Flammable Vapor-Gas Dispersion Exclusion Zones
On April 13, 2023, PHMSA approves DNV’s petition for Phast version 8.4 as an alternative model for calculating the flammable vapor dispersion exclusion zones under 49 C.F.R. § 193.2059(a). The Final Environmental Assessment discusses the analysis of the validation results. Other documentations...
Onshore Gas Gathering FAQs for Type C and R Pipelines
The Onshore Gas Gathering FAQs for Type C and Type R Pipelines include general guidance on gas gathering and specific guidance on requirements applicable to Type C and Type R gathering lines.
PHMSA Safety Advisory Notice: Transportation of Electric Vehicles Containing Lithium Batteries Damaged by Extreme Weather Events
PHMSA published a Safety Advisory Notice on the "Transportation of Electric Vehicles Containing Lithium Batteries Damaged by Extreme Weather Events" to serve as a reminder of PHMSA's current requirements under the Hazardous Materials Regulations for transport and shipment of electric vehicles...
DOT-111 Ethanol Phase-Out Frequently Asked Questions (FAQs)
PHMSA issues responses to FAQs addressing questions about the upcoming phaseouts for transporting ethanol in DOT-111 tank cars. These FAQs will respond to questions and requests for guidance from railroads and tank car shippers on the upcoming May 1 and July 1 ethanol phaseout deadlines.
Notice of Limited Enforcement Discretion for Certain Onshore Gas Transmission Pipelines Conducting Remedial Actions Under 49 CFR 192.473
In relation to its final rulemaking entitled "Pipeline Safety: Safety of Gas Transmission Pipelines: Repair Criteria, Integrity Management Improvements, Cathodic Protection, Management of Change, and Other Related Amendments," PHMSA is providing notice that in certain limited circumstances...
Notice of Limited Enforcement Discretion for New and Replaced Onshore Gas Transmission Pipelines
In relation to its final rulemaking entitled "Pipeline Safety: Safety of Gas Transmission Pipelines: Repair Criteria, Integrity Management Improvements, Cathodic Protection, Management of Change, and Other Related Amendments," PHMSA is providing notice that it will exercise regulatory...
Safety Advisory Notice: Railroad Emergency Preparedness
This Safety Advisory alerts those engaged in the rail transportation of hazardous materials of their obligation to appropriately plan for emergencies and share information about available emergency response resources, as well as urges actions to ensure emergency responders are adequately...