Many technologies have been developed for source and plume treatment, all with specific advantages and limitations. Selecting a treatment technology requires evaluating several factors, including technical site features (e.g., geology, hydrogeology, and contaminant levels), regulatory requirements, sustainability, and community stakeholder interests. Traditionally, treatment technologies are applied individually at a site, with the expectation that one … Continue reading
Capping is designed to achieve one or more of the following objectives depending upon the cause of exposure and risk at a site: Cap thickness often determines the effectiveness of the cap. Typically the thicker the cap, the greater the reductions in pore-water concentration in the near surface and the greater the reduction in contaminant … Continue reading
In situ sediment treatment involves applying or mixing of an amendment into sediments. Mixing may be achieved either passively, through natural biological processes such as bioturbation, or actively through mechanical means (using augers, for instance). Treatment amendments may be preferred in areas with higher contaminant concentrations, where MNR/EMNR cannot achieve risk goals in an acceptable … Continue reading
