What happens if soil vapor contamination or soil vapor intrusion is identified during investigation of a site?
Depending on the investigation results, DEQ may require additional sampling or mitigation, in addition to requiring cleanup of the subsurface sources. Additional sampling would be performed to determine the extent of soil vapor contamination and to verify questionable results. Mitigation is action that is taken to minimize exposures to indoor air contamination while cleanup is occurring. Mitigation may include sealing cracks in the building’s foundation and installing a sub-slab depressurization system beneath the building (similar to a radon mitigation system).
Related Questions
- What is the primary reason that soil-gas sampling for vapor intrusion differs from soil-gas sampling for typical site assessment?
- What happens if soil vapor contamination or soil vapor intrusion is identified during investigation of a site?
- What happens if the Site Investigation soil samples show exceedances?
