Markey also raises questions about the potential toxicity of the trademarked formulation, and whether the chemical could be contributing to new reports of large undersea "plumes" of oil suspended thousands of feet below the water's surface.
(NASA's Terra satellite captured a visible satellite image of the Gulf oil spill on May 17 from the Moderate Resolution Imaging Spectroradiometer Instrument on-board. The oil slick appears as a dull gray on the water's surface and stretches south from the Mississippi Delta with what looks like a tail. Credit: NASA Goddard / MODIS Rapid Response Team / Rob Gutro)
"The release of hundreds of thousands of gallons of chemicals into the Gulf of Mexico could be an unprecedented, large and aggressive experiment on our oceans," said Rep. Markey, chair of the Energy and Environment Subcommittee in the Energy and Commerce Committee, which is conducting an extensive investigation into the spill. "The information regarding the chemical composition, efficacy and toxicity of the dispersants currently being used is scarce."