Soilwashing - United States Environmental Protection Agency...

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United States Office of Solid Waste and EPA 542-F-01-008 Environmental Protection Emergency Response May 2001 Agency (5102G) A Citizen’s Guide to Soil Washing ? EPA uses many methods to clean up pollution at Superfund and other sites. Some, like soil washing, are consid- ered new or innovative . Such methods can be quicker and cheaper than more common methods. If you live, work, or go to school near a Superfund site, you may want to know more about cleanup methods. Perhaps they are being used or are proposed for use at your site. How do they work? Are they safe? This Citizen’s Guide is one in a series to help answer your questions. What is soil washing? Soil washing “scrubs” soil to remove and separate the portion of the soil that is most polluted. This reduces the amount of soil needing further cleanup. Soil washing alone may not be enough to clean polluted soil. Therefore, most often it is used with other methods that finish the cleanup. How does it work? Chemicals tend to stick or sorb to some types of soil more than others. For instance, chemi- cals sorb more to fine-grained soils like silt and clay than to larger-grained soils like sand and gravel. The silt and clay, in turn, tend to stick to sand and gravel. Soil washing helps separate the silt and clay from the larger-grained, cleaner soils. It works best when the soil contains a
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This note was uploaded on 10/20/2010 for the course SOIL 479 taught by Professor Ulery during the Spring '10 term at NMSU.

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Soilwashing - United States Environmental Protection Agency...

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