The U.S. Government Accountability Office (GAO) released a report which concludes that the North Aleutian Basin, located in the Alaskan OCS, could hold substantial amounts of oil and natural gas, although the upper ranges of its estimates are highly uncertain. The GAO also identified certain challenges that MMS faces in meeting federal requirements for development of oil and gas in the Alaskan OCS, including the need to prepare a comprehensive NEPA guidance handbook. The GAO report was requested by Chairman of the Appropriations Subcommittee on Interior, Environment, and Related Agencies Rep. Norman Dicks (D-WA).