Chemical Oxidation of PCE Contaminated Soil and Groundwater
| Location: |
Roselle, New Jersey |
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| Value: |
$
525,000.00 |
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Panther designed and implemented a subsurface chemical oxidation injection system consisting of six horizontal injection galleries and 60 vertical injection wells arranged in 13 discreet zones for injection. Prior to installation of the injection system, Panther completed an oxidation bench test to determine the natural oxidant demand of site soil and groundwater, and to compare multiple oxidant mixtures and dosages to determine which oxidant would result in the highest target contaminant reduction. In this case, sodium permanganate injected in a 5% solution resulted in 100% reduction of target contaminants in both the sorbed phase and the dissolved phase. The complete subsurface injection system was installed in 3-weeks while redevelopment of the site occurred. Following approval by the New Jersey Department of Environmental Protection, Panther commenced injection of sodium permanganate into the horizontal and vertical injection zones utilizing a centrally located injection manifold to complete the first round of injections. Special considerations at this project site included its location at an extremely busy intersection, coordination with other site development contractors, and concerns regarding utilities and other potential interferences.
Based on calculations, Panther injected about 105,000 lbs of sodium permanganate into the network to overcome natural oxidant demands, high levels of sorbed phase organic compounds (up to 10,000 mg/kg CVOCs) and elevated dissolved phase contaminants (up to 100 mg/l CVOCs). The subsurface injection system was installed and operated while a newly installed bank was opened at the site and the low profile nature of the system allowed continued operation of the injection system during banking hours without interruption to the client’s operations at the site. The project was successful with very large reductions in contaminant mass, allowing a petition for site closure. |
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