AGENCY:

Pipeline and Hazardous Materials Safety Administration (PHMSA), Department of Transportation (DOT).

ACTION:

Notice.

SUMMARY:

PHMSA is publishing this notice and a draft letter of decision to solicit public comment on a petition for approval that would authorize the use of an alternate flammable vapor-gas dispersion model in connection with the siting of liquefied natural gas (LNG) facilities.

DATES:

Submit any comments regarding the petition by October 9, 2026.

ADDRESSES:

Comments should reference the docket number for the petition request and may be submitted in one of the following ways:

• E-Gov Web: www.regulations.gov. This site allows the public to enter comments on any Federal Register Notice issued by any agency. Follow the online instructions for submitting comments.
• Mail: Docket Management System: U.S. Department of Transportation, 1200 New Jersey Avenue SE, West Building Ground Floor, Room W12-140, Washington, DC 20590-0001.
• Hand Delivery: DOT Docket Management System: West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE, between 9:00 a.m. and 5:00 p.m. EST, Monday through Friday, except Federal holidays.
• Fax: 202-493-2251.
• Instructions: You should identify the docket number for the petition request you are commenting on at the beginning of your comments. If you submit your comments by mail, please submit two copies. To receive confirmation that PHMSA has received your comments, please include a self-addressed stamped postcard. Internet users may submit comments at www.regulations.gov.
• Note: There is a privacy statement published; to review the statement, go to www.regulations.gov, scroll down to the bottom left to click “Privacy & Security Notice.” Comments, including any personal information provided, are posted without changes or edits to www.regulations.gov.
• Confidential Business Information: Confidential Business Information (CBI) is commercial or financial information that is both customarily and actually treated as private by its owner. Under the Freedom of Information Act (5 U.S. Code 552), CBI is exempt from public disclosure. If your comments in response to this notice contain commercial or financial information that is customarily treated as private, which you actually treat as private, and that is relevant or responsive to this notice, it is important that you clearly designate the submitted comments as CBI. Pursuant to 49 CFR 190.343, you may ask PHMSA to provide confidential treatment to information you give to the agency by taking the following steps: (1) mark each page of the original document submission containing CBI as “Confidential”; (2) send PHMSA a copy of the original document with the CBI deleted along with the original, unaltered document; and (3) explain why the information you are submitting is CBI. Submissions containing CBI should be sent to Mr. Lee Cooper, 1200 New Jersey Avenue SE, DOT: PHMSA-PHP-80, Washington, DC 20590-0001. Any commentary PHMSA receives that is not specifically designated as CBI will be placed in the public docket.
• Privacy Act: DOT may solicit comments from the public regarding certain general notices. DOT posts these comments, without edits, including any personal information the commenter provides, to www.regulations.gov, as described in the system of records notice (DOT/ALL-14 FDMS), which can be reviewed at www.dot.gov/​privacy.
• Docket: For access to the docket to read background documents or comments received, go to www.regulations.gov. Follow the online instructions for accessing the dockets. Alternatively, you may review the documents in person at the street address listed above.

FOR FURTHER INFORMATION CONTACT:

General: Mr. Lee Cooper by phone at 202-913-3171 or by email at lee.cooper@dot.gov.

Technical: Mr. Thach Nguyen by phone at 909-262-4464 or by email at thach.d.nguyen@dot.gov.