The site accepts depleted uranium, a material that takes millions of years to decay, and therefore requires special precautions and regulations.

[4][5] Most of the radioactive waste from the decommissioning of the San Onofre Nuclear Generating Station is going to the Energy Solutions facility in Clive, Utah, and is being transported by rail.

[6][7] In 2020, major pieces of the San Onofre plant were transferred from rail to be moved by platform trailer trucks along 400 miles of highway.

[11] This would have made Utah, after Texas, the second state in the US to allow the importation of Class B and C radioactive wastes.

[11] In 2015, the State of Utah started making plans to bring the site closer to taking 250,000 tons of radioactive waste.