BP has agreed to pay a record $15 million fine to the federal government for air pollution violations at its troubled Texas City refinery. Federal prosecutors said Thursday the penalty stems from two fires and a leak that sent thousands of pounds of toxic pollutants, including the carcinogen benzene, into the air in 2004 and 2005. The fine [is] the largest for Clean Air Act violations at a single facility... BP's new chief, Bob Dudley, is promising to put a new emphasis on safety as he takes the reins today...The company also faces penalties for the release of more than 500,000 pounds of toxic chemicals into the air from the Texas City refinery during 40 days in April and May [2010]..."BP and the EPA have focused on activities which should reduce the risk that similar incidents may occur in the future," BP spokesman Scott Dean said. "BP Products has incorporated lessons from these events into its current work processes and training."