Definition Organic compounds that do not dissolve readily in water. Description NAPLs do not readily dissolve in water, but either float or sink in it depending on its density. A NAPL contamination plume usually has multiphase flow. Why are nonaqueous phase liquids important? It is a common contaminant found in groundwater in urban and industrial areas. It is difficult to detect and quantify the occurrence or movement thereof, therefore making remediation difficult.
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