Rivers are dynamic.
In real terms, this means that we may expect any recent sediments to move, to redistribute within a timeframe of tens to hundreds of years. As weather systems become more dynamic, more frequent, larger storms should be expected. This is a most probable scenario for what may be expected regarding the redistribution of sediments containing polychlorinated biphenyls in the Hudson River. Nothing has been done to remediate the PCB problem in the Hudson since it was documented, more than two decades ago. It is not, however, as if G.E. did not have the scientific tools at hand to address the problem of PCB s moving from sediments into the water column or biota.