Rainwater basins at Orio al Serio, Bergamo, Italy Solutions applied Water Products used Drening Project size 12000 m2 Geoplast's Drening was recently used in the Fly Park of Orio al Serio airport in Bergamo, Italy to create 3 rainwater dispersion basins. In total 1,870 Drening pieces were used which will drain 12,000 sqm surface area.