Collected from Toronto Harbour in 1981, contains high levels of leadAl . 55597 µg/gCu .103 µg/gPb. 257 µg/gAs.9.59 µg/g*Fe .35032 µg/gSe.0.911 µg/g*Cd .5.41 µg/g*Hg. 0.440 µg/g*Tl .0.623 µg/g*Cr . 125