Working for an international environmental consulting
firm at the time, ECL principal Fraser Hamilton was assigned to direct and
manage the closure of USTs at a site in Louisville, Kentucky. It
ended up costing over a million dollars to deal with what the regulators
called the biggest area of soil and groundwater contamination from a UST
site seen to date. Mr. Hamilton was the onsite construction manager and
project manager for this project. The plume of contaminated soil and
groundwater extended underneath the pad of a new Dillard's store.
The owner was afraid that the proposed groundwater extraction would result
in settling that would cause his expensive Italian marble floor to crack.
The scope of work expanded from environmental assessment
and remediation to foundation design and construction oversight.
Once the foundation was installed, 137 wells and nearly a mile of pipe was
installed. A custom PLC system was designed and constructed to
control valves, a thermal oxidizer and a groundwater treatment
system. Manual control of the PLC was possible from anywhere.
The environmental construction was scheduled around the
mall expansion and no construction or opening schedules were
affected. The project was done on a fast track with the approval of
the regulatory agency who eventually issued an NFA.