| Laboratory analytical data indicated a historical release was discovered along the flowline during the Spike State CC30-18 flowline decommissioning. One soil sample, FL02-08, exceeded ECMC standards for naphthalene at 0.14 mg/kg, benzo(a)anthracene at 1.47 mg/kg, benzo(a)pyrene at 1.14 mg/kg, benzo(b)fluoranthene at 1.89 mg/kg, dibenz(a,h)anthracene at 0.141 mg/kg, pyrene at 2.46 mg/kg, 1-methylnaphthalene at 0.0398 mg/kg, and 2-methylnaphthalene at 0.0695 mg/kg. This location lies within the Pronghorn Winter Concentration High Priority Habitat. |