Two South Bay congress members are, for a second time, accusing ExxonMobil of failing to cooperate with a federal investigation of its Torrance refinery in the wake of a February explosion, the Daily Breeze reports. Reps. Ted Lieu and Maxine Waters say the company is blocking access to some refinery units and witnesses. Meantime, a Torrance City Council workshop is scheduled to be held today to discuss safety issues at the refinery.