Por: Ing. Robinson Paredes, Ing. Robert Montes Quispe, Ing. David Ulloa Trejo e Ing. Cesar Castañeda, Minera La Zanja.IntroductionThe mining sector has the clear objective of developing its activities with social and environmental responsibility, both inherent to operations. The first is because it involves a large number of workers and takes place in populated high Andean areas. The second, because of the disturbances in the geographical area in which it is developed, as well as the chemical agents used for metallurgical processes.The geographical disturbances generate a contaminating agent known as acid water due to its high concentration of metals such as Al, Fe and Mn, mainly known as heavy metals. The periodic table includes about 70 metallic elements, and 59 of them can be considered heavy metals, which are those with an atomic weight greater than that of iron (55.85 g/mol). This would exclude metals with atomic weights lower than Fe and which can often be contaminating metals such as V (50.95), Mn (54.44), Cr (52.01) and others that are not really metals such as As, F and P (Galán & Romero, 2008, p. 2).Compañía de Minas Buenaventura operates Minera La Zanja, located in the village of La Zanja (also known as La Redonda), in the district of Pulán, province of Santa Cruz de Succhabamba, department of Cajamarca. The project area includes the high areas of this district, at an altitude that varies between 2,800 and 3,811 m, and the area bordering Catache district, in the same province of Santa Cruz de Succhabamba, and Calquis, Tongod in San Miguel de Pallaques province.