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Risk assessment using this method is based upon both the nature of the process and the way in which it’s managed. It’s divided into 2 parts:
Environmental Impact Appraisal (EIA), which concerns the potential environmental impacts of a process according to its type, level of upgrading to meet regulatory requirements, and its location (applies to Part 1 activities only)
Operator Performance Appraisal (OPA), which relates to how well the operator manages the potential environmental impact of the process