Portonave has a sanitary effluent treatment station that receives the wastewater generated by the Terminal’s activities before being discharged. In 2015, the treatment station’s capacity was increased, which required it to be deactivated from June to December. Prior to deactivation, 12,768 m³ of effluents were treated at the treatment station and discharged into the Itajaí-Açu River, in accordance with the applicable legislation. In the subsequent months of the year, 5,711.93 m3 of effluents were subjected to external treatment by a specialized third-party service provider. Portonave’s treatment station is expected to resume operations in 2016.
The Terminal discharges surface water directly into the estuary. The water is collected through a drainage canal approximately 200 meters long, where a stormwater runoff withdrawal system approximately 5,000 meters long converges. The canal has a waterproof lining and a floodgate that prevents contact of the stored water with the river. This prevents, in the event of a leak of pollutant products in the yard, the contaminated water from being discharged into the river. The pH and dissolved oxygen (DO) levels of the water