Reports were prepared for air quality both inside and outside the Tunnel in accordance with international standards. Upon the assessment of these reports, all of the parties that have both prepared and supervised the project concluded that the mechanical ventilation system with 2 extraction vents was appropriate and sufficient for the Eurasia Tunnel.
Exhaust emissions is conducted to the shafts by a total of 92 jet fans – 46 jet fans on each level – and is absorbed by 4 axial fans, one of which is spare. The ventilation shaft on the Asian side was designed 25 meters above the ground – 28 meters in total – to avoid any impact on high buildings nearby such as Siyami Ersek Hospital. The shaft on the European side was designed 5 meters above the ground – 20 meters in total – to avoid any impact on the silhouette of the city in accordance with the decisions of Istanbul Board No 4 for Cultural and Natural Heritage Preservation, and all the ventilation system was prepared accordingly. Two air quality monitoring stations were established by the Designated Company (Avrasya Tüneli İşletme İnşaat ve Yatırım A.Ş.) near the ventilation shafts on each side In order to monitor outside air quality. The data obtained from these stations is shared with the public through the National Air Quality Monitoring Network.
In coordination with the Ministry of Transportation, Maritime and Communication, the Designated Company has dedicated an area for building an air treatment plant in each of the two ventilation buildings inside the Tunnel against the possibility of breaching air quality standards due to unexpected climate change, and will implement this step as needed.
Additional information and technical reports may be obtained from the Ministry of Transportation, Maritime and Communication.