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Risk assessment using this method is based upon both the nature of the activity 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 an activity according to its type, level of upgrading to meet regulatory requirements, and its location
Operator Performance Appraisal (OPA), which relates to how well the operator manages the potential environmental impact of the activity