The estimate of a total quantity of 35,000 tons of ammunition is based entirely on one testimony, second-hand and 'retold' after more than half a century. In it, former director of the dredging firm Decloedt states that for six months at a rate of 300 tons per day was dumped. The assumption that a third of this ammunition was poison gas, followed indirectly from the ratio in ammunition use at the end of the war by the German artillery and therefore not from registrations of the dumping operation on site.
New research by Dr. Luc Vandeweyer (State Archives) and Dr. Tine Missiaen (University of Ghent), brings an entirely different truth to light. Files of the Belgian Maritime Administration, the Belgian Army's Recuperation Service and the cabinet of then Belgian Minister of War Masson, which had never been examined before, show that the dumping of leftover ammunition on the Paardenmarkt was exclusively caused by poisonous gas grenades. It is therefore highly likely that the dumped ammunition on the Paardenmarkt consisted almost entirely, rather than one third, of poison gas grenades.