Firstly, you must ensure that you store all fertilisers safely.
Special requirements apply for the storage of ammonium nitrate (AN) fertiliser. As an oxidising agent, it can help other materials to burn and in certain circumstances it can explode and give off toxic fumes.
- Storage buildings should be constructed of non-combustible material and should not contain other combustible materials.
- Where this is not reasonably practicable, store AN fertilisers as far away as possible from combustible materials and never within 2m of them.
- If you are storing over 25 tonnes of dangerous substances or 150 tonnes or more of AN (where the nitrogen content exceeds 15.75% by weight), you must notify your local Fire & Rescue Service.