What are the two options for certified contractors to abate contaminated soil under Regulation 8?

The correct answer highlights the specific methods authorized under Regulation 8 for certified contractors to handle contaminated soil. Removing gross visible debris and the top two inches of soil is a practical approach to eliminate surface contamination, which is crucial as contaminants can often be concentrated within the upper layers of soil. This method ensures that a significant portion of highly contaminated soil is effectively addressed.

Additionally, the option of permanently encasing the contaminated area allows for the contained management of any remaining pollutants. This encapsulation method can prevent further exposure and leaching of hazardous materials into the environment.

This approach reflects the regulatory intent to ensure that soil abatement is both thorough and minimizes the risk of spreading contaminants during the cleanup process.