The lasagna technology for in situ soil remediation. 1. Small field test

A novel, in situ remediation technology called Lasagna is being developed f or cleaning up contamination in heterogeneous or low-permeability soils. Th e technology uses electrical current to drive contaminants from the soil in to treatment zones installed directly in the contaminated area. The collabo ration between a consortium of industry (Monsanto, DuPont, and General Elec tric) with the Department of Energy (DOE) and the Environmental Protection Agency (EPA) has led to two field tests at a DOE plant, chosen for its comb ination of low-permeability soil and trichloroethylene (TCE) as the sole co ntaminant. This paper describes the first field rest in which TCE in the co ntaminated soil was transported into carbon-containing treatment zones wher e it was trapped. The test was very successful, removing over 98% TCE from the contaminated soil, with most treated samples showing greater than 99% r emoval. The success of this test paved the way for the second and much larg er field test in which TCE was degraded in place.