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Metals
| N (%) | |
|---|---|
| Lead | 35 (22.7) |
| Cobalt | 25 (16.2) |
| Mercury | 25 (16.2) |
| Chromium | 21 (13.6) |
| Iron | 19 (12.3) |
| Arsenic | 9 (5.8) |
| Copper | 6 (3.9) |
| Miscellaneousa | 13 (8.4) |
aIncludes manganese, aluminum, cadmium, cesium, molybdenum, nickel, selenium, tin, and titanium
