Table 2: Summary of selected results of sediment analyses Element Sample concentration range (ug/g) OMOE LEL concentration range (ug/g) Average great Lakes sediment concentration (ug/g) Ontario surface soils average concentration (ug/g) Cadmium ND – 1.9 0.6 10 1.1 4 Chromium 10.1 28.5 26 110 31 50 Copper 3.3 34.6 16 110 25 60 Iron (%) 0.56 3.37 2 4 3.12 3.5 Lead 2 58.9 31 250 23 150 Managanese 40.3 964 460 1100 400 1000 Nickel 4.5 18.7 16 75 31 60 Zinc 32 – 239 120 – 820 65 500 * All concentrations as ug/g (ppm) unless otherwise noted, based on 54 samples. ND = Not detected (i.e. below detection limit)