This method is primarily used to treat soil with high levels of contaminants, such as MGP soil, by heating it in a rotating dryer to destroy contaminants. The treated material then enters a soil conditioner (called a pugmill) where it is cooled and rehydrated with water and residual contaminated materials, including sludges. Finally, the cooled soil is stockpiled, sampled and tested by an independent certified laboratory to ensure effective treatment and fulfillment of reuse standards. The resulting treated soil is either beneficially reused as fill material or landfill capping or cover.
Soil that is lightly contaminated with petroleum hydrocarbons is inoculated with engineered bacteria and nutrients that combine to completely break down soil contaminants in 7 to 14 days. Bioremediation is typically used on soil with lower levels of contaminants. The resulting treated soil is either beneficially reused as fill material or landfill capping or cover.
In this process, soil is mixed with other earthen material, screened and paired with chemical additives to formulate a particular fill material. It is best used for light to medium hydrocarbon and/or contaminated soil impacted by metals.
Dredged sediments are screened to remove large objects and excess water. The remaining material is fed through a conveyor belt to a pugmill mixing system, where we introduce combustion byproducts and proprietary reagent admixtures. The resulting material is highly valued for its outstanding geotechnical properties, and is often beneficially reused as fill material.
Special sizing and segregation processes remove unsuitable materials from incoming soils. The resulting soils generate in engineered material suitable for beneficial reuse as fill material or landfill capping or cover.