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. 2004 Dec 8;113(4):465–477. doi: 10.1289/ehp.6932

Figure 4. Representation of subsurface flushing technologies in a shallow, relatively homogeneous, unconfined aquifer with a well-defined DNAPL source zone (generalized to include steam, co-solvent, and surfactant). Insets represent DNAPL recovery mechanisms (top, mobilized bank of free product collecting DNAPL ganglia; bottom, reduction in entrapped DNAPL mass through solubilization).

Figure 4