Under the Health and Safety Tab on a Property is a free text box called Hazards. This is there for you to record any known hazards on this property. This information can then be taken through to the Work Order so that the Supplier gets the information.
To get it to show on the work order. You will see on the bottom right hand side of the Work Order is a new selection. Add Hazard Default/Comments.
This will show on the work order as following