In 2015, the California Department of Toxic Substances Control (DTSC) approved a Final Remedial Action Plan (RAP) outlining cleanup activities for the Ascon Site. The cleanup plan was approved following a rigorous, multi-year public review and a formal Environmental Impact Report (EIR) process per the California Environmental Quality Act (CEQA).
Since work began in January 2019 on the activities outlined in the RAP, approximately a third of the excavation work has been completed.
The cleanup plan includes the removal and offsite disposal of impacted soils from the former Pit F, which was completed in 2021. Learn more about the Pit F work and telemetry air monitoring here. The remaining waste and soils will be excavated, graded, and covered in an engineered containment area that will be underneath a multi-layered environmental cap. After the final excavation and grading is complete, the environmental cap is constructed with geomembrane barriers and clean soils, and planted with native, drought-tolerant plants. The property will continue to be inspected and maintained long-term as secured open space with residential-style perimeter fencing. See what Ascon will look like at Future of the Site.