Answer:
Remediation typically occurs during Phase II of an environmental assessment.
Step-by-step explanation:
Phase II involves the collection of data through site investigations, sampling, and analysis to assess the presence and extent of contamination. Once the contamination is identified, the remediation phase is initiated to address and mitigate the environmental risks. Remediation activities can include soil and groundwater cleanup, containment measures, and restoration efforts. Phase III focuses on evaluating the effectiveness of the remediation actions, while Phase I involves initial assessment and Phase IV deals with long-term monitoring and maintenance.