Why use S/S for MGP sites?
Cement-based solidification/stabilization is increasingly being used at former manufactured gas plant (MGP) sites since it can treat contaminated media while the media remains in place. In-place (or in-situ) treatment can be more protective of human health and the environment than traditional dig and haul remedies. In-situ treatment minimizes excavation and the associated releases of volatiles. Putting excavated material on the road to a landfill poses additional hazards, disturbance, emissions, and inconvenience to the surrounding community. In-situ S/S treatment is often lower in cost than other treatment technologies. Recently at a former MGP site in Milwaukee in-situ S/S was selected to treat the majority of contaminated media when it was demonstrated that thermal desorption treatment would be more than twice the cost per unit treated compared to S/S.
