Soil contamination can be a danger to the life sustaining in the affected area. Industrial sites are typical sites of soil pollution. One technique to clean up the land is called solvent flushing; this can be used to remove the targeted material from below the ground surface. A structure is built that encompasses the contaminated region, and then an alcohol-laced water solvent is pumped through an entrance well that forces the polluting material up through an exit well. Next, these recovered materials can be properly cared for and disposed of. Some specific solvents that have been used in extraction processes are methanol, acetone and dichloromethane. Gas chromatography has also traditionally been used, but bioanalytical methods are more recently being developed as a quicker way to remediate soil.
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