When a tank is decommissioned in place, what is true regarding sampling?

When a tank is decommissioned in place, sampling plays a crucial role in assessing potential contamination and ensuring that any subsurface pollutants are identified. The correct approach to sampling involves collecting samples from specific depths to accurately evaluate the soil and any possible leakage from the tank.

Collecting samples at least one but not more than two feet below the bottom of the tank is essential because this depth ensures that the samples are representative of the area most likely to be impacted by any leaks or spills from the tank. By focusing on this designated depth, regulators and environmental professionals can effectively monitor and assess the contamination levels in soil just below the tank, which is critical for making informed decisions about remediation or further actions needed.

This grounding in standards and practices helps ensure that the decommissioning process is thorough and compliant with environmental regulations, safeguarding both public health and the environment.