Mining Areas workers	Age groups	Referents	Workers
Mining Areas workers	Age groups	Referents	PMDC	LCDC	ICD	HCM	BCM
Calcium/Lead Mole ratio
Scalp hair
Outdoor workers	18 - 35	0.00131	0.00154	0.0016	0.00152	0.001603	0.001711
Indoor workers	18 - 35	-----------	0.00193	0.00204	0.001974	0.002131	0.00225
Outdoor workers	36 - 55	0.00172	0.00188	0.00202	0.001957	0.002112	0.00217
Indoor workers	36 - 55	______	0.00252	0.00286	0.002462	0.002701	0.002718
Blood
Outdoor workers	18 - 35	0.00155	0.00151	0.00167	0.001556	0.001655	0.00175
Indoor workers	18 - 35	______	0.00202	0.00198	0.001883	0.002088	0.002221
Outdoor workers	36 - 55	0.00204	0.00191	0.00198	0.001849	0.001947	0.00215
Indoor workers		______	0.00221	0.00236	0.002119	0.002297	0.002743