Remediation – Soil Source Removal

During a tank closure performed at an un-registered facility in downtown Jacksonville, Earth Systems removed petroleum impacted soil in the vadose and smear zone in conjunction with the removal of two USTs. Soil samples were collected on 5 to 10-foot centers and at 2-foot depth intervals during the source removal. The samples were screened with an organic vapor analyzer (OVA). Based upon previous assessment activities at the site, soils producing OVA responses of greater than 50 parts per million was considered excessively contaminated. As a result, the excavation was extended to encompass the 50-ppm soil OVA contour. Post-remedial sampling from the four corners and base of the excavation confirmed that all soil that contained petroleum compounds in excess of SCTLs was removed during the excavation. Post remedial groundwater monitoring indicated that the removal of excessively contaminated soil from the smear zone also served to reduce contaminant levels in the surficial aquifer to below GCTLs.