Contaminated Soil Disposal

Contaminated Soil Disposal 

Iowa - July 2014

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Seneca’s Environmental Services division assisted a Private Client in a quick-turnaround petroleum contaminated soil (PCS) disposal project. The PCS was discovered during an underground storage tank removal and inclement weather conditions delayed this project. Once the weather was favorable, Seneca’s Environmental Services team utilized its local contacts and available Iowa Department of Natural Resources (IA DNR) licensing to mobilize quickly.

The decision was made to dispose of the PCS via landfarming, a proven and effective method of PCS disposal. Compared with traditional landfill disposal, landfarming provides clients with a convenient and environmentally friendly method of disposal. This method is also preferable to other options due to its cost-effectiveness. 

What is landfarming?
“Landfarming, is an above-ground remediation technology for soils that reduces concentrations of petroleum constituents through biodegradation. This technology usually involves spreading excavated contaminated soils in a thin layer on the ground surface and stimulating aerobic microbial activity within the soils through aeration and/or the addition of minerals, nutrients and moisture.”  

Source: United States Environmental Protection Agency (US EPA)

Seneca notified the IA DNR of the location and source of the PCS and the project proceeded. In total, 510 cubic yards of PCS were spread in a thin layer over an existing farm field. The PCS was then remediated through biodegradation and aeration. In just a few short months, the soil was free of any contaminants, as was verified through analysis and samples of the soil.