Temporary Groundwater Treatment System Continues Operations; Construction of Treatment Building Begins
During the treatment system design process, the Temporary Groundwater Treatment System has been operating since May 2017. Continued hydraulic monitoring and routine sampling of the system and surrounding groundwater monitoring wells indicate the system continues to achieve the three performance objectives required by design: maintaining a hydraulic capture zone, decreasing concentrations of 1,4-dioxane in groundwater, and maintaining acceptable treatment system effluent concentrations. The Demonstration of Compliance Report through June 2018 can be found here.
Work during the spring and summer of 2018 has been focused on completing the final design of the permanent treatment system and continued operations of the Temporary Groundwater Treatment system.
A site specific treatability study was completed in 2017 to identify the best ex-situ treatment option for the 1,4-dioxane and VOCs in the groundwater plume. Based on this study, an Advanced Oxidation Process (AOP) was selected as the most effective treatment option due to its ability to degrade 1,4-dioxane. A 100% Design Report for the system was submitted to the EPA in July 2018. Construction of the Treatment Building began in September and the final treatment system is expected to be installed and operational before the end of 2018.
Temporary Groundwater Treatment System on the Knox Trail Property, operating since May 2017 and maintaining the hydraulic containment.