The invention provides repeated sequential stages of chemical and biological
treatment to meet soil and/or groundwater treatment goals. Chemical treatment is
undertaken to directly destroy a portion of the contaminants via oxidation, with
such chemical treatment occurring in discrete injection events. Near the completion
of an injection event, the remedial additive concentrations or delivery rates are
increased. During or subsequent to the chemical treatment event, beneficial nutrients
and additional microbial populations are added to the soil and or groundwater based
upon field or laboratory testing and calculated optimal concentrations.
