Table 4.
Site | Dust event' frequency (per year) |
Fraction of cases with metal/metalloid enhancement |
Pb (%) |
As (%) |
Cu (%) |
Cu (%) |
---|---|---|---|---|---|---|
Chiricahua | 7 | 63% | 42 | 21 | 37 | 49 |
Organ Pipe | 7.3 | 78% | 49 | 10 | 55 | 63 |
Queen Valley | 3 | 55% | 35 | 27 | 41 | 41 |
Tonto | 6.4 | 64% | 43 | 15 | 38 | 59 |
Saguaro West | 7.1 | 89% | 56 | 16 | 63 | 81 |
Saguaro NM | 4 | 82% | 52 | 18 | 54 | 73 |
Phoenix | 6.8 | 88% | 70 | 21 | 68 | 78 |