Table 1.

Variables that were used to determine the risk of exposure to PAHs substances in the outdoor air of Shahryar city.

Exposure Parameter	Unit	Child	Adult	Reference
Body Weight	kg	15.0	61.5	[26]
Exposure Frequency	day.year−1	180	180	[27]
Exposure Duration	Year	6.00	24.0	[28]
Inhalation Rate	m3.day−1	10.0	20.0	[29]
Ingestion Rate	m3.day−1	200	100	[28]
Dermal Exposure Area	cm2.day	2800	5700	[28]
Dermal Adherence Factor	mg.cm2	0.200	0.070	[28]
Dermal Adsorption Fraction	Unitless	0.13	0.13	[28]
Mean Life Span	Day	70 × 365 = 25550	70 × 365 = 25550	[27]
Particle Emission Factor	M3.kg	1.36 × 109	1.36 × 109	[28]