Updates (06/30/2015):

Thank you to all who have contributed throughout the study process and your continued interest in the study.  The committee’s July meeting will be closed in its entirety.   

Thank you to our speakers, Tim Nedwed and Anthony Swift, for their participation at our third committee meeting on May 4, 2015 and to those who observed the meeting via WebEx.

The May 4, 2015 meeting agenda has been posted.   Participants will be able to view the meeting virtually via WebEx.  WebEx information will be sent to those who have registered.  Please register here.

Thank you to our speakers and all of those who attended our second committee meeting on March 9-10, 2015.  Speaker presentations from the meeting have been added and available for your viewing.

The March 9-10, 2015 meeting agenda has been posted.

The upcoming meetings schedule has been added.  Please visit the Meetings tab.

Thank you to all of those who attended our first committee meeting on December 3, 2014.  Speaker presentations have been added and are available for your viewing.

The provisional committee has been appointed.  For more information, visit the Committee tab.

If you’d like to be added to the study listserv to receive updates, please e-mail us.



The National Research Council’s (NRC) Board on Chemical Sciences and Technology is conducting a consensus study entitled, “Effects of Diluted Bitumen on the Environment: A Comparative Study.” The study sponsor is the Pipeline and Hazardous Materials Safety Administration (PHMSA), US Department of Transportation. This project follows a previously released NRC report sponsored by PHMSA which addresses whether the transportation of diluted bitumen by transmission pipeline has an increased likelihood of release compared to other commonly transported crude oils.



Charge to the Committee

Under the oversight of the National Research Council’s Board on Chemical Sciences and Technology, an ad-hoc committee will analyze whether the relevant properties of diluted bitumen differ sufficiently from those of other crude oils commonly transported in US transmission pipelines to warrant modifications of the regulations governing spill response plans, spill preparedness, and/or cleanup.

The full statement of task is available here.

You can reach us at dilbit@nas.edu.


Photo credit: ©Ruth Peterkin/Shutterstock