How is the Soil Matrix Cleanup Level determined for a site?

The determination of the Soil Matrix Cleanup Level for a site is primarily influenced by the depth to the groundwater level. This is crucial because the proximity of contaminants in the soil to the groundwater can significantly affect the risk of contamination reaching the groundwater supply. If the contaminants are located above or within a certain distance from the groundwater level, there is a higher potential for leaching, which ultimately affects drinking water safety and environmental health.

When assessing how to delineate cleanup levels, understanding the depth to groundwater helps in establishing a remedial goal that takes into consideration how quickly contaminants could migrate through the soil and impact groundwater. This metric is vital for determining appropriate cleanup actions to safeguard not only the soil but also the water resources that might be affected by soil contamination.