Site-wide soil sampling across fourteen (14) contiguous parcels comprising one city block in downtown San Jose revealed elevated concentrations of lead at hazardous waste levels in shallow soils that was attributed to the flaking of lead-based paint used on historic residential and commercial structures that 
were constructed on the site as early as the late 1800s. In order to cost-effectively remove approximately 4,500 cubic yards of lead impacted soils from potential exposure to future onsite receptors, Weber, Hayes and Associates was retained to complete the following remedial actions:
- Removal and consolidation of the well-defined shallow soil impacts from all parcels in accordance with the USEPA Area of Containment approach
- Burial of the impacted soils beneath a portion of the parcels within a regulatory approved burial envelope/encapsulation cell
- Emplacement of a clean soil cap above the impacted soils that will subsequently be improved upon with a five-story mixed use building
This Remedial Action Plan involved working with a risk assessor to produce lead leaching models based on site 
specific soil and hydrogeologic data to demonstrate that buried contaminated soils would not impact shallow groundwater.
The field implementation involved the deployment of multiple dust monitors for daily air monitoring to confirm that pre-calculated Dust Action Levels were not exceeded, and confirmation soil sampling / lab analysis to verify that the lead impacted soils had been adequately removed.
The implementation of this successful remediation approach allowed for safe redevelopment of the property while significantly reducing project remediation costs by avoiding the transport and disposal of State and Federal hazardous waste.
