@ aplenty- While medical Low-grade waste only has a half-life only emits harmful radioactive decay for 160 days or less, industrial and military nuclear waste is much more harmful. The waste that was dumped off the Farallon islands is a cocktail of military waste totaling some 50,000 drums of nuclear waste. Each barrel potentially includes small amounts of neutron-radiated metal, and other industrial nuclear waste from the Radiological Defense Laboratory at the Hunter's Point Shipyard.
In 1951, the USS Independence was towed out to the dumpsite, and sunk with the rest of the nuclear waste. The USS Independence was no ordinary ship; it was a decommissioned aircraft carrier that was used as a test subject for a nuclear explosion. One of the first nuclear bombs tested was dropped on the independence, creating an irradiated metal hulk. The dangers of the Farallon Island nuclear waste are still there, and are not decayed y any means.