| Based on possible field indicators operator submitted excavation soil samples to the laboratory for same-day turnaround. Partial laboratory analytical data indicated a historical release discovered beneath an aboveground storage tank during the Roach N-65N67W 14NWSE tank battery decommissioning. One soil sample, AST02, exceeded ECMC standards for 1,2,4-trimethylbenzene at 0.90 mg/kg, 1,3,5-trimethylbenzene at 0.42 mg/kg, and naphthalene at 0.081 mg/kg. The supplemental Form 27 will be submitted once all lab data is received for remediation number 36226 detailing the remedial site plan, document number 403916727. |