The audit was conducted from 11 to 13 June 2025.
Objective
The objective of the audit was to verify how COSL complies with regulatory requirements for barrier management within electrical facilities, safety instrumented systems and technical safety, and to monitor how COSL has followed up previously identified non-conformities within the topics of this audit.
Result
The audit identified eight non-conformities in the following areas:
- Spare parts evaluation
- Maintenance
- Deficiencies in fire doors and fire walls
- Watertight HVAC valves
- Lack of monitoring and control of the safety integrity of fire and gas detectors in operation
- Work in electrical facilities
- Procedures
- Inadequate performance standards
We also observed one factor that we have chosen to categorise as an improvement point. This concerned:
- Integrity of the drilling derrick during hydrocarbon blowout
Follow-up of non-conformities
During the audit, we also verified how COSL has addressed certain previously identified non-conformities.
We found that the following non-conformity has not been addressed in line with previous feedback to us:
- Non-conformity 5.1.9 on performance standards, with ref. to the report following the audit of electrical systems, technical safety and drilling-related systems from Chapter 5.1 of the post-audit report of 18 May 2018, our journal entry 2018/360.
What happens now?
We have asked COSL to report to us by 18 September 2025 on how the non-conformities will be addressed, and to give us their assessment of the improvement point observed.