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MULTIMEDIA CONCENTRATIONS OF PAH IN SEVERAL DAY CARE CENTERS
Citation:
Wilson, N K., J. C. Chuang, AND C. Lyu. MULTIMEDIA CONCENTRATIONS OF PAH IN SEVERAL DAY CARE CENTERS. POLYCYCLIC AROMATIC COMPOUNDS 17(3):255-265, (1999).
Description:
Concentrations of polycyclic aromatic hydrocarbons were measured in nine day care centers in the spring of 1997. Indoor and outdoor air, food and beverages, indoor dust, and outdoor play area soil were sampled. The mean sums of 20 target PAH concentrations were 265 and 199 ng/m3 in indoor and outdoor air, respectively; 3.48 ppm in classroom dust; 1.56 ppm in playground soil; 4.33 ppb in solid food; and 1.38 ppb in liquid food. Large differences in PAH concentrations between the centers were observed only for play area soil, where the mean concentrations at the centers serving primarily low-income clients were as much as 42 times higher than those at the other centers. Potential exposures through the inhalation and ingestion pathways were calculated. The ingestion pathway was most important, especially for the larger 4-7 ring PAH.
The information in this document has been funded wholly or in part by the United States Environmental Protection Agency under Contract 68-D4-0023 to Battelle. It has been subjected to Agency review and approved for publication. Mention of trade names or commercial products does not constitute endorsement or recommendation for use.