An In Silico Approach for Evaluating a Fraction-Based, Risk Assessment Method for Total Petroleum Hydrocarbon Mixtures

Table 1

MADEP toxicity values for TPH fractions [3].

Hydrocarbon fraction	Oral (mg/kg/day)	Inhalation (mg/m^3)
Aliphatic
No.1: C5–C8	0.04	0.2
No.2: C9–C18	0.1	0.2
No.3: C19–C32	2.0	NV^a
Aromatic
No.1: C6–C8	SC^b	SC^b
No.2: C9–C18	0.03^c	0.05
No.3: C19–C32	0.03^c	NV^a

^aNV: not volatile.^bSC: used single chemical values (fraction includes benzene, toluene, xylene, and ethyl benzene).^cMADEP grouped the entire range of aromatics from C9–C32 into a single fraction for oral noncancer toxicity.