Professor Jay Cullen said a plume of radioactive material from Japan was tracked across the Pacific and arrived off the west coast of North America last June

“As of 2013, (it was) detected inshore along Vancouver Island,” Dr. Cullen said

Several radioactive materials have been found, with Cesium 137 the most potentially problematic

He said off Vancouver Island, a measurement of [Cesium 137 found] .009 Becquerels per litre [9 Bq/m³]

The plume also contains other radioactive material, including 90 at a far, far lower level than was released into the atmosphere during the nuclear bomb testing

Low levels of plutonium and tritium might be in the plume


… Pu and Am will tend to accumulate in benthic crustaceans and mollusks…