| Laboratory analytical data indicated a historical release was discovered beneath the produced water vessel during the Roach Bass T5N-R67W-S14 L01 Loc tank battery decommissioning. One soil sample, PWV04-B, exceeded ECMC standards for benzene at 0.026 mg/kg, 1,2,4-trimethylbenzene at 0.12 mg/kg, 1,3,5-trimethylbenzene at 0.056 mg/kg, TPH at 850, 1-methylnaphthalene at 0.0174 mg/kg, and 2-methylnaphthalene at 0.034 mg/kg. |