carbon analyses. The Desert Research Institute conducted x-ray diffraction (XRD), XRF, carbon, and ion analyses on 15 resuspended samples. R.J. Lee Group was responsible for individual particle analysis using computer-controlled scanning electron microscopy (CCSEM) and the secondary electron imaging by high magnification scanning electron microscopy (SEM).

A sampling schedule of 1 day in 6 was followed. Because of the limited availability of samplers and personnel to conduct the sampling, only one sample set (with Teflon filters, “Sample Set T”; with quartz-fiber filters, “Sample Set Q”; or with Nuclepore filters, Sample Set “N”) was collected on a given sampling day. During a period of 1 month, there were two sampling days each for Teflon and quartz-fiber filters, and one sampling day for Nuclepore filters. During the field campaign period, 40% of the samples were collected on Teflon filters, 40% on quartz-fiber filters, and 20% on Nuclepore filters. Thus, during the period of the sampling year, Teflon and quartz-fiber filters each were collected for a maximum of 7% of the days. The sampling time for Teflon and quartz-fiber filters was 24 hours. For the Nuclepore filters, the sampling period was only 2 hours because CCSEM analysis requires that filter samples be only lightly loaded.

TABLE 2-1 Sampling Sites and Sampling Periods

Sampling Location 

Sampling Period

Beginning

End

Djibouti

12-05-2005

06-09-2007

Bagram, Afghanistan

12-07-2005

05-21-2007

Khowst, Afghanistan

04-28-2006

06-22-2007

Qatar

02-16-2006

02-06-2007

United Arab Emirates

02-18-2006

02-07-2007

Balad, Iraq

01-15-2006

03-24-2007

Baghdad, Iraq

01-08-2006

01-11-2007

Tallil, Iraq

01-15-2006

02-15-2007

Tikrit, Iraq

01-12-2006

03-12-2007

Taji, Iraq

02-05-2006

02-11-2007

Al Asad, Iraq

01-08-2006

12-26-2007

Northern Kuwait

01-28-2006

02-04-2007

Central Kuwait

03-14-2006

03-19-2007

Coastal Kuwait

01-20-2006

03-20-2007

Southern Kuwait

01-21-2006

01-15-2007

Source: Adapted from Engelbrecht et al. 2008.



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