Patricia-McAllister
Patricia-McAllister
Patricia-McAllister
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Regulatory Approach for the Environmental<br />
Release of PNTs<br />
• Confined Releases<br />
• Risk = Hazard x Exposure<br />
> Environmental hazard is unknown or not fully characterised<br />
> Regulatory program concentrates on environmental exposure<br />
evaluation and mitigation<br />
• Unconfined releases<br />
> Environmental exposure of a known risk (maximum exposure is<br />
assumed)<br />
> Regulatory program concentrates on environmental hazard<br />
evaluation* and stewardship, where required<br />
*Sometimes referred to as “safety assessments” to distinguish them<br />
from quantitative risk assessments
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