zvi jet injection remediation hydraulic fracturing direct push injection zero-valent iron napl pneumatic volatile organic emplacement dpt ji voc slurry zero-valent clay battelle jetting direct push saprolite trichloroethene tce back diffusion till geology landfill 3-d printing csm environmental dpt jet injection 3d printing 3-d conceptual site models environmental visualization evs cad 3d modeling 3d clay remediation high-pressure injection till remediation saprolite remediation high pressure injection zvi slurry clay till low-permeability application of remediation technologies dpt injection slurry emplacement remediation in tight soils direct push jetting geoprobe injection injection tooling source treatment dnapl ozone source zone chemical oxidation sparge injection remedy vadose zone isco sve source area in situ sparging
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