A sheen of MTBE stretches up the Houston Ship Channel near
Morgan's Point, Texas, March 10, 2015.
On March 9, 2015, The Carla Maersk was carrying about
216,000 barrels of Methyl Tertiary Butyl Ether and an unknown quantity of the
product was spilled. (U.S. Coast Guard photo by Petty Officer 3rd Class Dustin
R. Williams)