Former MGP - 2004-2005 - AUGUSTA, USA

  • Site : former MGP 

  • Surface : 2,2 Ha

  • Contaminants : coal tar, BTEX, PAH, NAPL, ...

  • Site challenges : stratigraphy – large & uncertain DNAPL mass – sensitive structures (utilities)

  • Pilot to evaluate effectiveness of 'Catalyzed Hydrogen Peroxide' injections - CHP

  • Exothermic reaction : desorption of NAPL

  • Full scale:
         729 fixed injectors were installed
         8 000 m3 of 14 % H2O2 injected
         10 months of injection daily 'real time' monitoring
         95 % mass reduction – No NAPL – PID< 50 ppm

  • Vacuum extraction was implemented to influence the flow direction of the oxidant

  • ISCO remediation cost: $5 million

  • Other remediation option cost:
         
    in-situ stabilization - $9 million

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