Douglas, 2/11/2004 Sierra Vista, 2/11/2004

59.6 µg/m3 ± 2.4 22.6 µg/m3 ± 5.2

Willcox, 2/15/2004 Sierra Vista, 2/15/2004

86.7 µg/m3 ± 1.3 34.5 µg/m3 ± 2.6

Benson, 2/19/2004 Sierra Vista, 2/19/2004

23.8 µg/m3 ± 2.5 24.4 µg/m3 ± 3.0

Tucson, 2/23/2004 Sierra Vista, 2/23/2004

30.2 µg/m3 ± 6.9 12.6 µg/m3 ± 1.2

Sierra Vista temp, 2/27/2004

Sierra Vista perm, 2/27/2004

11.0 µg/m3 ± 0.5

Willcox, 3/02/2004 Sierra Vista, 3/02/2004

14.6 µg/m3 ± 1.7 12.8 µg/m3 ± 1.7

SV, 2/11/04 SV, 2/15/04 SV, 2/19/04

SV, 2/23/04 SV, 2/27/04 SV, 3/02/04