Title: Contaminant Flux Reduction Barriers for Managing Difficult-to-Treat Source Zones in Unconsolidated Media 
Resource Type: document --> technical publication --> report 
Country: USA 
Language(s): English
Year: 2017 
Author 1/Producer: ESTCP 
Author / Producer Type: Agency, regulator or other governmental or inter-governmental body 
Report/Document number/description: Project ER-201328 
Publisher Country: USA 
Publisher web link (root): https://www.serdp-estcp.org/content/download/45694/425998/file/ER-201328%20Final%20Report.pdf
Report / download web link (=direct link): https://www.serdp-estcp.org/content/download/45695/426008/fi ...  
EUGRIS Keyword(s): Contaminated land-->Remediation options-->In situ treatment technologies
Short description: The overall objective of this project was to evaluate if inexpensive flow reduction agents delivered via permeation grouting technology could help manage difficult-to-treat chlorinated solvent source zones. Two types of flow-reduction materials for permeation grouting were evaluated in terms of performance (i.e., flux reduction properties), cost, ease of installation, and longevity: conventional physical compounds, such as silica gel, and a novel vegetable oil formulation. This report describes the results of a small-scale demonstration (three small barriers) constructed in a clean zone that achieved an average 64% reduction in flow-through, which was lower than the performance objective of a 90% reduction in flow, likely owing to the low permeability of silty sands in the test area. The main goal of the demonstration was to show that remediation technology (direct push rigs and subsurface injection) could be used to make permeation grouting barriers at contaminated sites and to compare the relative performance of the flow-reduction materials in reducing aquifer transmissivity. Applications of one acre in area or more are estimated to be significantly less costly than conventional in situ remediation technologies ($996K/acre and $21/yd3 for a one-acre site) 
Submitted By: Professor Paul Bardos WhoDoesWhat?      Last update: 10/11/2017