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Huff & Huff, Inc. holds a license from NASA for the manufacture, use, and sale of EZVI. EZVI combines three remediation technologies: partitioning of the chlorinated volatile organic compounds (CVOCs) into vegetable oil, a chemical reaction between the CVOCs and elemental iron, and hydrogen production from fermentation of the vegetable oil to promote biological dechlorination. EZVI is best suited to remediate source areas where dense non-aqueous phase liquids (DNAPLs) are present or likely to be present. Until DNAPL has been eliminated, other remedial efforts are simply stop gap efforts. DNAPLs represent a concern at many sites across the nation; between 60 to 70 percent of all sites on the Superfund Priority List have DNAPL contamination.