- Site : former MGP site
- Contaminants : coal tar, BTEX, PAH, NAPL, ...
- Site challenges : stratigraphy 3 zones - deep (15 m) – large DNAPL mass – sensitive structures (utilities – center town)
- Pilot to evaluate effectiveness of 'Catalyzed Hydrogen Peroxide' injections - CHP
- Full scale:
1 235 fixed injectors at 4,5-m spacing
11 300 m3 of 8 % H2O2 injected
11 months - daily 'real time' monitoring
Goals were met : No NAPL, PID<50 ppm
Remediation goals were obtained
- ISCO remediation cost: $9,5 million
- Other remediation option cost: excavation estimated at $21 million
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