In April 2021, SOUTHERN PERU requests the fabrication of the sixth oxidation tank (replacing the first one manufactured in 2003) for the production of sulfuric acid, 2.00 m diameter and 6.20 m height, manufactured with Novolac Epoxy Vinylester Vinylester high-end resin and inner pipe spool in SS-316 material to operate in conditions: H2SO4 at 50% @100 °C. In this way, SOUTHERN PERU maintains its confidence in LEPSA, whose commitment to quality and guarantee has been in force for more than 20 years.