The Hanford Site in Washington stores 90 million gallons of radioactive waste in underground tanks. To reduce risks, waste retrieval is ongoing using a method called Past Practice Hydraulic Sluicing. This involves using liquids to dislodge and retrieve tank waste. The goal is to meet regulatory requirements for waste retrieval and tank closure, as outlined in the TriParty Agreement. Leakage from tanks has been reduced, and efforts are underway to further reduce risks and prepare materials for treatment.