According to the guidelines, what must be collected during the decommissioning process?

During the decommissioning process of heating oil tanks, it is essential to collect at least two samples of the surrounding soil to comply with the Department of Environmental Quality (DEQ) requirements. This practice is crucial because it ensures that any potential contamination from the tank or its contents is properly assessed. By taking multiple samples, one can achieve a more reliable understanding of the soil conditions around the tank site and any possible environmental impact that the decommissioned tank might have had.

Collecting soil samples as mandated allows for adequate testing and analysis, which is necessary for making informed decisions about remediation if contamination is detected. This systematic approach is part of responsible and effective decommissioning practices that prioritize environmental safety and compliance with regulations.