he excavation of contaminated media is required, and therefore dust and particulate emissions must be controlled.
Any free-phase contaminants must be removed prior to mixing soils into the slurry. Very high contaminant concentrations may be toxic to microorganisms.
Drying the soil after treatment may be expensive. Disposing of wastewater may also present a problem. It should be carefully monitored for residual contaminants.
The biodegradation of specific contaminants in any specific soil/site condition is dependent upon many factors, including soil type, soil chemistry, the mix of contaminants and temperature. To determine whether biodegradation is an appropriate remedy, it is necessary to characterize the contamination, soil, and site, and to evaluate the biodegradation potential of the contaminants. A preliminary treatability study should be conducted.
An acceptable method for disposing non-recycled wastewater is required.
Low ambient temperatures can decrease biodegradation rates. Heavy metals are not treated by this method. They can be toxic to microorganisms.