Element Low High 2003 2006 Low and 2006 High and 2003
Copper (Cu) 8.84 14.85 0.0018 0.0068 0.06 0.03
Silver (Ag) 0.30 0.31 0.16 0.36 0.11 0.05
Gold (Au) 0.028 0.037 12.87 21.52 0.61 0.47
Palladium (Pd) 0.012 0.019 6.53 10.61 0.13 0.13
Total 9.2 15.2 0.90 0.68