Remediation of groundwater and soil to treat an area of hydrocarbon contamination at NASA's Kennedy Space Center at Cape Canaveral without damaging underground infrastructure used in situ chemical oxidation.
NASA's consultant Tetra Tech used Regenox from Regenesis to carry out the work at a 4,000 gallon underground fuel tank which had leaked at the Launch Equipment Shop.
Contamination included a layer of light non-aqueous phase liquid up to 380mm thick with total petroleum hydrocarbon levels up to 20,000ppm in soil and 42ppm in groundwater.
The tank and 178t of soil were excavated and disposed of, but utilities precluded further excavation. Regenox was chosen as a non-corrosive, low-temperature, low-pressure chemical oxidation technology.
Around 22,000kg were injected via 52 injection wells and the area of contaminated soil reduced by 75% and substantial reductions made in groundwater contamination.
Plans to include a further soil removal phase of work to address free product contamination were replaced by adjusting the dosing to handle the phase separated material.
