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Audit

A tiered audit program helps Marathon maintain regulatory compliance, adhere to Company standards and achieve continuous improvement.

  • Tier I and II audits focus on compliance. 
  • Tier III audits test HES&S management system implementation and effectiveness. 
  • Tier II and III audits are conducted with the assistance of a third party expert, except in limited circumstances.

Business units develop corrective actions to address audit findings and track corrective actions to completion. Lessons learned are shared across organizations. Key audit findings and trends are communicated to HES&S leaders and senior management.