Home Remediation Case Studies Case Study J1: Pump and Treat at a Former Petrol Filling Station (Watford) - Petroleum Hydrocarbons
Case Study J1: Pump and Treat at a Former Petrol Filling Station (Watford) - Petroleum Hydrocarbons

widnes2-75Clean up of a hotspot of groundwater heavily impacted with a mixture of hexavalent chrome and xylene ahead of redevelopment.

 

 


Client URS/Developer
Consulting Engineer
URS
Location Watford
Value £130k
Form of Contract
ICE 6th

Project

Clean up of a hotspot of groundwater heavily impacted with a mixture of hexavalent chrome and xylene ahead of redevelopment. Paint pigment provided visual suggestion of contamination.

Contaminant

Hexavalent chrome and xylene

Challenges

Small footprint treatment area and system capable of handling 2000mg/l chrome and 30mg/l xylene. Solids pre-filtration of microscopic paint pigment particles.

The site was undergoing demolition and general earthworks to prepare the site for redevelopment.The traditional precipitation method for removal of chrome VI would require a large footprint area that would hinder these works.

Technologies employed

  • Semi-automated ion exchange unit
  • White Karbon - WK25 for xylene and WK40c for chrome VI

 

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Treatment unit capable of
treating 20 m3/hr

 

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White Karbon