Two facilities (E & N) were volunteered by their operators for enhanced diagnostics after the baseline deployment and before start of the EOP deployment. At these facilities, intensive BU screening was performed to supplement the TD methods. Facility N is a simple transmission site featuring two turbines (32,000 HP/24 MW) driving centrifugal compressors and minimal other equipment, including inlet scrubbers and yard piping. Facility E is a complex gas processing plant with 15 compressors (total of >40,000 horsepower/35 MW)