From June 8 to 11, the external audit of the Environmental Management system based on ISO 14001: 2015 was carried out in Alcali by the Lloyd's Register certification house, in which compliance with the requirements established in the international standard was reviewed, which includes, among others, the legal requirements, operational control procedures, identification, evaluation and control of environmental aspects associated with activities and services, hazardous waste management and emissions; likewise, the Environmental Management System Certificate was endorsed.