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OW-5/55R AREA IN-SITU GEOCHEMICAL STABILIZATION REMEDIATION PERFORMANCE EVALUATION, FORMER KOPPERS WOOD TREATING PLANT, NASHUA, NEW HAMPSHIRE
New Hampshire Department of Environmental Services, 106 pp, 2015
In November 2014, in situ geochemical stabilization (ISGS) reagent injections were performed in the OW-5/55R area, targeting previously identified zones of subsurface creosote NAPL. Targeted injection depths were determined by the Environmental Visualization System (EVS) model generated during characterization. The EVS model is a statistical distribution of the subsurface NAPL developed based on the logs recorded during characterization. EVS represents the best available tool for evaluation of the extent and depths of NAPL seams in the pilot-test area. Direct-push injections were performed with a Geoprobe® rig. The direct-push injection points were initially established based on a 15-ft triangular grid pattern throughout the pilot-test area. The field locations of injection points were adjusted based on rig access and the locations of large trees, keeping the injection locations as close as possible to the proposed locations. The majority of the injection intervals were performed at depths between 25-35 ft bgs. Full-scale implementation will be designed based on the procedures and approaches documented in the successful 2014 pilot test. https://clu-in.org/download/contaminantfocus/dnapl/treatment_technologies/Koppers-NH-ISGS-2015.pdf
In November 2014, in situ geochemical stabilization (ISGS) reagent injections were performed in the OW-5/55R area, targeting previously identified zones of subsurface creosote NAPL. Targeted injection depths were determined by the Environmental Visualization System (EVS) model generated during characterization. The EVS model is a statistical distribution of the subsurface NAPL developed based on the logs recorded during characterization. EVS represents the best available tool for evaluation of the extent and depths of NAPL seams in the pilot-test area. Direct-push injections were performed with a Geoprobe® rig. The direct-push injection points were initially established based on a 15-ft triangular grid pattern throughout the pilot-test area. The field locations of injection points were adjusted based on rig access and the locations of large trees, keeping the injection locations as close as possible to the proposed locations. The majority of the injection intervals were performed at depths between 25-35 ft bgs. Full-scale implementation will be designed based on the procedures and approaches documented in the successful 2014 pilot test. https://clu-in.org/download/contaminantfocus/dnapl/treatment_technologie
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