Cornerstone Earth Group, Inc. provided environmental and geotechnical services to the City of San José for the cleanup of the Legacy Lagoons located at the San José – Santa Clara Regional Wastewater Facility (RWF) after the San Francisco Bay Regional Water Quality Control Board issued an order requiring cleanup of the Legacy Lagoons area. Cornerstone began work on this project in May 2019. Phase one the Legacy Lagoons cleanup initiated in August 2019 and was completed in December 2020, ahead of schedule.