Clean up of soil contaminated with hazardous orgnaic substances is a common challenge faced by the environmental engineering profession.Two broad categories of organic chemiscals are found in soil: low boilding volatile chemicals may of which are chlorinated solvents; heavier boiling hydrocarbons of various types that include fuels, manufactured gas plant (MGP) site wastes comprising of creosote, phenols, and polyaromatic hydrocarbons. Traditional methods of clean up have invlved excavation of the contaiminated soil followed by reburial in an approved landfill or high temperature incineration.In recent years new technologies have bene developed for the in situ treatment of the contaminated soil with minimal or no excavation. For example, in site venting was developed for the removal of voltaile organic chemicals (VOCs)~1, while some developers have injected steam and hot air for the removal of VOCs as well as higher boiling compounds~2.
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