Collected from Lake Ramsay in Sudbury, Ontario, Canada, a well-known mining area. It has high cobalt, copper and nickel levels but low mercury leveAl. 58049 µg/gGa. 14.3 µg/g*Sb .0.727 µg/g*As.31.1 µg/g*Hg. 0.098 µg/g*Sc.11.0