During the tests conducted in 1919, the operator concluded that the ammonium nitrate and sulphate mixtures containing
less than 60 % of de ammonium nitrate were not likely to explode. Consequently, this fertiliser was considered to be a
very safe substance. For instance, it was stored in enormous quantities on site in storage buildings, namely building 85,
a 165 X 30 X 50 m building with a storage capacity of 50,000 tonnes.