Treatment of Cr(VI) and CHC Groundwater Contamination under a Residential Development

Case study highlights:

• REGENESIS provided an accurate and pragmatic design approach for the busy residential construction site
• Full-scale remediation was completed comprising a of a series of rows, totaling 78 injection points, to fit in between the residential properties and services
• A mixed plume of CHCs and Cr(VI) was treated concurrently using a combination of complementary substrates
• The works were completed rapidly with minimal disruption to the construction project and existing residents
• The use of barriers, targeting hotspots and pathways provided a cost-effective and efficient treatment of the plume
• Remediation Cost and Result Graph included

On the site of a former chrome plating works, construction and inhabitation had begun on a new residential development. Hexavalent chromium (Cr(VI)) and some chlorinated hydrocarbon compounds (CHCs) had been discovered in the groundwater beneath the development. It was determined by the environmental consultant that the Cr(VI) was driving a risk on the site. The housebuilder required rapid achievement of site targets in order to continue the development of the site.