Tengizchevroil restarts operations after toxic substance release

Kazakhstan's biggest oil producer, Tengizchevroil, has restarted operations at its first-generation oil and gas separation plant which had been briefly suspended on Tuesday after a toxic substance was released, the company said.Chevron, ExxonMobil, Lukoil and KazMunayGas are partners in the venture, which said the event was caused by an unplanned power loss and there were no injuries, spills or equipment damage."KTL (oil and gas separation plant) start-up is proceeding safely."The Central A