Innovation in Environmental Solutions

Human Health Risk Assessment 4 Multipronged, Safe Approach Saves Millions and Preserves Landscape To address potential risk to future residences, our team worked with the redevelopment team to prepare a preliminary layout for each estate lot, including location of future structures, to minimize the footprint for excavations in areas where subsurface soils exceeded risk-based limits. We also recommended that clean fill be brought in to cap other areas where constituent concentrations in surface soil posed a potential risk, which also limited excavations activities. The extent of excavation and amount of fill necessary were specified for each of the estate lots based on the risk assessment findings. Deed restrictions were recorded for each of the estate lots limiting future excavation by the property owners. Lastly, the vapor intrusion pathway was addressed by requiring mitigation systems be installed preemptively within any future residential structures built within the estate lots. Overall, this risk-based approach resulted in millions of dollars in savings during redevelopment and preserved the beauty of this fading landscape along the California coastline.