Table 2.

Values of the parameters used in the health risk assessment model (US EPA, 2009)

Parameter	Value	Unit
CF	0.001	mg/mg
IR	.83	m3/h
ET	24	h/day
EF	350	days/year
ED	24	Year
BW	70	Kg
AT	24 X 365	Day
RfD (Benzene)	.03	mg/kg/d
RfD (Toluene)	5	mg/kg/d
RfD (Ethylbenzene)	1	mg/kg/d
RfD (Xylene)	.1	mg/kg/d
SF	.0273	(mg/kg/day)− 1