Maceió, February 21, 2019 - Braskem starts this Wednesday (2/20), the assembly of a probe to perform a sonar study in well 16, in the district of Pinheiro, near the Freire Ribeiro complex. The sonar is a requirement of the National Mining Agency (ANM) and the objective is to monitor the salt wells using the eco-acoustic method. Acoustic waves are emitted with the use of a specific equipment. With this emission, it is possible to make a technical assessment of the well.