Submit a NAMOS form if you store 25 tonnes or more of a dangerous substance. That includes fertiliser (ammonium nitrate).
Let us know again once you've used or no longer store the substance. We can take this into account if we have to visit your location.
The data in this form will be used by Hertfordshire County Council / Herts Fire and Rescue Service (the data controller) to meet the statutory duty under the Dangerous Substances, Notification and Marking of Sites Regulations 1990 to register all premises containing dangerous substances. This includes making arrangements for inspection.
By submitting this form you will be notifying Hertfordshire Fire & Rescue Service that 25 tonnes or more of dangerous substances are used or stored, or will be used or stored in the named premises, and that a Fire Officer will be in contact to arrange a visit for an assessment of the site.
More about the Dangerous Substances (Notification and Marking of Sites) Regulations (Health and Safety Executive)