Click here for the current construction activities.
Implementation of the Final Groundwater Remedy will adhere to the Final Groundwater Design. The conditional approvals of the final design can be viewed here. The Final Groundwater Remedy Design document can be downloaded here.
Phase 1 of remedy construction, which began on October 2, 2018, is now complete. It includes the National Trails Highway (NTH) In-situ Reactive
Zone (IRZ) with 22 remediation wells (for injection and/or extraction) and a robust network of 75 monitoring wells (for measuring water levels and quality), as well as a network of over 74,000 linear feet of water conveyance piping and 41,000 feet of electrical conduits that connect the remediation wells to the power supply system, the carbon amendment building, and the produced water conditioning system.
All systems and components were integrated and tested to make sure they function properly. On December 22, 2021, PG&E turned on the NTH IRZ remedy treatment system. During the start-up process, water level and groundwater chemistry are closely monitored and adjusted to ensure the best possible treatment conditions. PG&E and the regulatory agencies will continue to monitor and adjust the initial operation of the NTH IRZ.
In parallel, PG&E commenced Phase 2 of construction in March 2022, as shown in the summary schedule which can be downloaded here.