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