GHD’s challenge was to investigate the extent of the
contamination and design an innovative and effective remediation
solution that would treat the key contaminants of concern including
total petroleum hydrocarbon (TPH); polycyclic aromatic hydrocarbons
(PAHs); benzene, toluene, ethylbenzene, xylenes (BTEX); cyanide,
ammonia, and heavy metals.
GHD was able to develop a cost effective and sustainable
remediation strategy for the site based on the principal of clean
up to the extent practicable (CUTEP) and using a combination of
in-situ and ex-situ stablisation, excavation and offsite disposal
of contaminated soils.
In order to develop a robust strategy for the site, GHD
completed the following activities: