Table 2

Concentrations of naphthalene (µg/m³) in environmental air and in breath

Variable	Exposure category	n	No. <LOQ	% <LOQ	Min	Lower quartile	Median	Upper quartile	Max
LOQ, limit of quantitation.
Naphthalene in air	High	113	0	0	12.8	179	485	867	3910
	Moderate	38	3	7.9	<1.0	2.2	10.3	29.8	932
	Low	139	30	21.6	<1.0	1.1	1.9	3.2	16.9
Naphthalene in breath, pre-exposure	High	112	77	68.8	<0.5	<0.5	<0.5	0.6	6.1
	Moderate	43	20	46.5	<0.5	<0.5	0.6	0.8	16.1
	Low	149	89	59.7	<0.5	<0.5	<0.5	0.7	36.3
Naphthalene in breath, end of exposure	High	104	0	0	0.7	2.6	6.0	16.1	75.8
Naphthalene in breath, post-exposure	High	111	7	6.3	<0.5	0.9	1.83	4.0	15.8
	Moderate	40	12	30.0	<0.5	<0.5	0.93	1.9	13.0
	Low	143	51	35.7	<0.5	<0.5	0.73	1.0	6.9