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SUSTAINABLE REMEDIATION COMBINING MOBILE DUAL PHASE EXTRACTION WITH CONCURRENT INJECTION OF A CARBON-BASED AMENDMENT
Barranco, F. and D. Hoyt.
AEHS Foundation 34th Annual International Conference on Soils, Sediments, Water and Energy, 15-18 October 2018, Amherst, MA. Abstract only, p 173, 2018

A study was conducted at a former Air Force tank farm to capitalize in an accelerated fashion on combining aggressive petroleum mass removal (free product and dissolved phase) by mobile dual-phase extraction (MDPE) with an innovative, in situ approach for promoting attenuation of residually entrapped and dissolved-phase mass. Following free-phase recovery, continued use of MDPE was simultaneously employed to recover additional contaminant mass (dissolved phase) and to maximize in situ emplacement of remedial amendment, an injectable carbon combined with chemical oxidants and oxygen-generating compounds. Over this 1-acre site, 48 extraction points were utilized with 167 surrounding injection points in a systematic grid fashion. Vacuum with MDPE was achieved at extraction points concurrently and just beyond the typical radius of influence for a given injection point. During extraction, amendment was injected and evenly distributed throughout the treatment area. The placement of injection and extraction points was designed and field-adjusted to achieve hydraulic capture and control. Results illustrate the performance of this combined, accelerated cleanup as well as the green and sustainable metrics (calculated via Sitewise™) of this treatment versus alternate approaches.



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