Koppers Barrier Cut-Off Wall

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On behalf of Koppers Carbon Materials and Chemicals, RCA is about to commence supervision of a significant cement bentonite slurry barrier cut-off wall and environmental monitoring at the Mayfield site in Newcastle.  The wall, which will be 417m in length and have an average depth of 18m, will isolate DNAPL contaminants (mainly Poly Aromatic Hydrocarbons) originating from tar from groundwater and is to be constructed by Keller Ground Engineering.

RCA’s ongoing involvement with Koppers follows on from many years of assistance at the site with ground assessments, groundwater modeling, assessing remediation options and developing a strategy/action plan and has involved close liaison with DECCW and a NSW Accredited Site Auditor.

The works will last approximately three months and will be followed by further hotspot remediation of free phase hydrocarbons in soils, capping of the site, pump and treat of groundwater contamination and ground water monitoring from an attenuation bore field.

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