Anddes contributes to the success of the Regina project through the following activities:

• -Review and evaluation of the detailed engineering of the homogenization and sludge ponds, developed for the environmental liabilities closure plan.

• -Review of the detailed engineering of the closure of the tailings dam and construction of the dike.

• -Study of application of technologies for the remediation of the Choquene lagoon.

• -Detailed engineering of the homogenization and sludge pond, according to the Sillustani SAC standards.