Reference doses (RFD) (mg/kg/day) of heavy metals via ingestion, inhalation and dermal exposure routes used for the non-carcinogenic health risk assessment.

Table 2: Reference doses (RFD) (mg/kg/day) of heavy metals via ingestion, inhalation and dermal exposure routes used for the non-carcinogenic health risk assessment.

Heavy metals	Pb	Cd	Cr	Ni	Cu	Fe	Zn
RFD Ingestion	3.5 E -3	1.0 E -3	1.5 E +0	2.0 E -2	4.0 E -2	7.0 E -1	3.0 E -1
RFD Dermal	5.3 E -4	1.0 E -3	3.0 E -3	2.0 E -2	4.0 E -2	7.0 E -1	3.0 E -1
RFD Inhalation	3.5 E -3	5.7 E -5	3.0 E -5	2.5 E -2	4.5 E -2	8.0 E -1	3.5 E -1