|
Construction of a light rail terminal involved
building a bridge over a small creek. On one side
of the creek, excavation for the abutment would
encounter legacy soil and groundwater
contamination. FRC screened soils from the
excavation into clean fill and residual waste
streams. FRC transported and disposed of the
stockpiled residual waste. Groundwater from the
excavation was initially intended by the designed
to be pumped out and disposed of off-site, but
they underestimated the volume required by several
factors. FRC designed and permitted a temporary
groundwater treatment system consisting of a
settling basin, media filters, and carbon filters.
FRC operated the system for two months while
construction proceeded, with discharge to the
stream. FRC's approach solved the problem for a
cost of $55,000, while as originally designed it
would have cost $315,000, for a savings of
$260,000 to the owner.
|
