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Appendix B: Review of Air Monitoring Data from Joint Base Balad
Pages 133-138

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From page 133...
... STRENGTHS AND LIMITATIONS OF THE AMBIENT DATA In each monitoring campaign at JBB, ambient air concentrations of PM 10, metals, speciated VOCs, PAHs, and PCDDs/Fs were determined using standard EPA methodologies. In the 2009 campaign, PM 2.5 was also measured.
From page 134...
... They do not directly measure emissions from the burn pit or from any other particular source. There are likely to be multiple sources of all the measured chemicals either on or in the vicinity of JBB, and the measurements include background concentrations due to those other sources as well as concentrations from the burn pit.
From page 135...
... The concentration of contaminants in or near the pit cannot be inferred from any of the samples obtained, so there could be a subpopulation of military personnel who were highly exposed but whose exposure cannot be estimated from available data. Polycyclic Aromatic Hydrocarbons Measurements of PAHs were obtained at five sampling sites at JBB, but for 2007 these were reported as three locations -- the guard tower/transportation field (20 samples)
From page 136...
... PM10 samples were obtained by specifically collecting particles with aerodynamic diameters less than 10 mm on filters. The measurement consists of a careful weighing of the filter before and after the collection period; then knowledge of the amount of air directed through the filter allows computation of the average concentration of PM10 in the air.
From page 137...
... 20 53 Solvent, combustion Methylene chloride 27 52 Solvent o-Xylene 51 52 Combustion n-Heptane 60 36 Petroleum-based fuel combustion Ethylbenzene 49 49 Combustion m,p-Xylene 55 NA Combustion Xylenes, total NA 45 Combustion 1,2,4-Trimethylbenzene 51 41 Combustion Octane 46 NA Petroleum-based fuel combustion Trichlorofluoromethane 42 37 Refrigerant Chlorodifluoromethane 41 NA Refrigerant Acrolein 4 34 Combustion 4-Ethyltoluene 38 12/30 Combustion Isopropyl alcohol NA 27 Solvent, disinfectant Methyl tert-butyl ether (MtBE) 29 0 Anti-knock fuel additive 1,3,5-Trimethylbenzene 24 11 Combustion Isooctane 17 NA Anti-knock fuel additive Styrene 17 14 Combustion 1,4-Dichlorobenzene 4 9 Mothballs, pesticide Cyclohexane NA 8 Petroleum-based fuel combustion NOTE: NA = not analyzed.
From page 138...
... In the 2007 measurements, there is no significant difference in individual congeners or in total PCDD/F between the January–April and October– November measurements at each location, although there is a slight trend for the January–April concentrations to be higher than the October–November concentrations at the guard tower/transportation field and H-6 housing/ CASF locations. REFERENCES ATSDR (Agency for Toxic Substances and Disease Registry)

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