PHMSA raised concerns in a Corrective Action Order ( CAO ) about numerous anomalies that had been detected on this pipeline by internal line inspection tools .
Enbridge had failed to check a number of those anomalies in the field .
PHMSA raised concerns in a Corrective Action Order ( CAO ) about numerous anomalies that had been detected on this pipeline by internal line inspection tools , yet Enbridge had failed to check a number of those anomalies in the field .