NEW YORK (Dow Jones)--BP PLC (BP, BP.LN) reported a flaring event at its Texas City, Texas, oil refinery for a period of 24 hours from an undetermined source, a filing to Texas state environmental regulators said. The event, which began at around 9:45 a.m. CDT on Saturday, sending emissions of benzene and sulfur dioxide to safety flare 2, is under investigation, the report to the Texas Commission on Environmental Quality said. A "site wide investigation to determine source in order to stop it," was listed as the action taken on the filing. A company representative was not immediately available for comment. BP's Texas City refinery is able to process up to 455,790 barrels of crude oil a day. -By Rose Marton-Vitale, Dow Jones Newswires; 212-416-2146, [email protected] (END) Dow Jones Newswires August 01, 2010 14:59 ET (18:59 GMT)