Table 23.
N (%) | |
---|---|
Lead | 44 (30.3) |
Iron | 30 (20.7) |
Mercury | 20 (13.8) |
Chromium | 11 (7.6) |
Cobalt | 7 (4.8) |
Arsenic | 5 (3.4) |
Copper | 5 (3.4) |
Miscellaneousa | 23 (15.9) |
Class total | 145 (100) |
aIncludes manganese, metal unspecified, cadmium, silver, titanium, antimony, barium, magnesium, nickel, selenium, thorium, uranium, and zinc sulfate