DNAPL (Dense Non-Aqueous Phase Liquid) is a phase liquid that characterizes one or more groups of chemical compounds. DNAPL is a big issue at the Montrose site, where it is suspected that these substances were leaked from the facility through disposal ponds, trenches, and any number of other unknown operations at Montrose. DNAPL is denser than water and generally insoluble in water. DNAPL is a serious source of the groundwater contamination from the sites, and the longer it is left untreated, the worse the contamination will become. DNAPL components at Montrose include DDT and Monochlorobenzene. 

The following documents are provided for more information and studies on DNAPL and the EPA’s Proposed Cleanup Plan:

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