The Oregonian reports that the Hanford Nuclear Reservation, formerly a nuclear weapons production site, sits on 586 square miles of land next to the Columbia. And it has already leaked and spilled some waste into the river, contaminating the water and surrounding environment with such fun things as strontium, cesium, tritium, and plutonium. The federal government did an analysis of the damage to determine if capping and sealing off the waste would stop more of it from getting out, and also, if more waste could be imported to the site to be buried along with the original waste.