The contaminated materials would then be placed in these cells and a second set of synthetic liners placed over the contaminated materials. Up to two feet of soil would be placed over the liners and the soils would be seeded. All areas outside these cells would also be filled with clean soils and planted with a variety of trees and shrubbery. Once cleaned, these areas would be reused. Various technologies are available to address the paint pigment and contaminated soils at the former paint factory site, and the sediments from Paintshop Pond.
Absorption takes place through the plants' roots structures, stems and bodies.
Once the plants have fully grown, they are harvested, and the contaminants they contained are removed and disposed of as hazardous waste. This process involves the in-place removal of contaminants from the soil, using water or solvents. The liquids used to flush the soil must be recovered to capture the contaminants. This requires the construction of a groundwater treatment system to collect the washwater. Once the contaminants have been removed, the wash water must be treated further before it can be discharged through the municipal sewer system.