NWHR-1isa harbour sediment from the mouth of the Humber River near Toronto, Ontario, CanadaAl 59250 μg/gGa. 14.9 μg/g*Sb .1.59 μg/g*As6.29 μg/g*Hg. 0.342 μg/g*Sc11.4 μg/g*B .55.7 μg/g*K 20828 μg/g*Se .0.713 μg/g*Ba 532 μg/g*La . 28.4 μg/g*Sn .9.87 μg/g*B