BP Amoco Corp. (formerly Amoco Corp.), Amoco Production Company, BP Exploration & Oil Inc., BP America Inc., Atlantic Richfield Company, and Vastar agreed to pay $20.5 million to resolve claims that they violated the False Claims Act by knowingly underpaying royalties owed on natural gas produced from federal and American Indian leases. The government alleged these companies improperly deducted from the royalty values they reported the cost of boosting gas up to pipeline pressures, improperly reported processed gas as unprocessed gas, and improperly failed to perform “dual accounting” on certain federal leases.