1. The investigation is limited to the activity done on the day of the incident. It did not mention that a backhoe was used some 2 to 4 days prior which could have struck the pipe with a minor dent and was aggravated by repeated vibration of passing HE vehicles atop that de-scaled the incrustated old metal pipe.
2. Review the corrective actions in the 1st incident of this nature in order to see which of them is implemented and not. Are the controls in the Work Permit for excavation complied and enforced by the Supervisors? Did they use the metal detector as per condition in the work permit?
3. Convene a meeting between concern supevisors, witnesses if any, Safety and the Project Manager to finalize your action plan to prevent recurrence. Do not forget the reccommendations in the first pipe damage incidents and compliance to the excavation work permit.
4. To be discussed by supervisors during the toolbox meeting and Weekly Safety Committee meeting.