Maceió, February 5, 2019 - Braskem initiated this Monday, February 5, the activities of the second probe for a sonar study, this time in Mine 19, located in the region of the district of Mutange, near the mining unit. The sonar study is a requirement of the National Mining Agency (ANM) and the objective is to monitor the salt wells using the eco-acoustic method. Acoustic signs are emitted using  a specific equipment. With this emission, it is possible to make a technical evaluation of the well.