The EPA estimates that there are thousands of sites around the United States contaminated with DNAPLs, including 60 to 70 percent of the sites on the Superfund National Priorities List, a comprehensive list of abandoned hazardous waste sites receiving top priority for environmental remediation. As such, EZVI was accepted into the EPA’s Superfund Innovative Technology Evaluation Program, which promotes the advancements of innovative technologies for detection and remediation of contaminated superfund-designated sites.
EZVI has proven a valuable tool in remediating these sites, and has also been used at dye, chemical, pharmaceutical, adhesive, aerosol, and paint manufacturing sites; dry cleaners; leather tanning facilities; metal cleaning and degreasing facilities; and many government-owned sites. The licensees of NASA’s EZVI technology are cleaning these contaminants from groundwater all over the country, in a wide variety of soil types, including sand and silt, clay, fractured bedrock, and residuum (soil formed in place by natural weathering).
The EZVI treatment methods generally take between 2 and 3 months, a vast improvement over traditional pump-and-treat systems, which can require decades. This reduced timeframe, in addition to the low cost of the materials and equipment, make EZVI cost-competitive with pump-and-treat, thermal treatments, and in situ chemical oxidation. In addition, some of these other methods have the potential to release the DNAPLs to previously uncontaminated areas. Since EZVI treats the contaminants in place, there is no risk for them to mobilize.