The main hazardous wastes identified in the mining facility
are described in Table 4. The areas of maintenance, mine, plant
equipments and vehicles were identified as the main generators
of hazardous wastes. In addition, the laboratory, concentration
plant and administration offices, as well as the personnel
houses reparation and maintenance, generate important amounts
of hazardous wastes (Fig. 5). Used oils account for the 83.2%
of the total generated hazardous waste, with 64.6 ton/year out
of 77.6 ton/year. Finally, there were other hazardous wastes
identified like fluorescent lamps, polyclinical residues, Ni–Cd
batteries, cartridges and toners, but they only account for
the 0.15% (0.12 ton/year) of the total generated hazardous
wastes.