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TerraStryke ERDenhanced DNAPL Source Zone Green Remediation Optics Manufacturing Facility, Lebanon, New Hampshire - Case Study
Courtesy of TerraStryke Products LLC
Background: Optical manufacturer desired sustainable low-impact groundwater remediation. ERDenhanced (2,600 pounds) deployed in 2001 via direct-push technology (26 nodes) into two, silty-clay, laterally continuous, hydraulically conductive source zones. Baseline concentrations of trichloroethylene (TCE) ≈97,400 micrograms per liter (µg/L); roughly 9% solubility, indicating significant residual source mass in saturated soils as non-aqueous phase liquid (NAPL).
Results: Post 6-months deployment TCE decreased 86%, followed by 4-5 years of enhanced solubilization of residual parent PCE DNAPL into dissolved phase, recorded as asymptotic TCE. Concurrent with the period of expedited solubilization was increased cis-1,2-DCE and ethene concentrations, indicating complete biotransformation and >99.9% reduction in PCE by 2010.
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