Doesn't your company have some HSE processes in place? Start with those undocumented processes and document them. Also, I suggest you look at the regulations and laws that apply to your company and industry to ensure that your company is complying. This will also provide with some information on what to document.
HSE document that works for one company will not necessarily work for your company. And to ensure that the document is correct, it is best that you write your own.
We might, however, be able to give you some topics to write about. To do this, perhaps you could tell us what industry you work in? However, some generic topics that might apply to you include:
- Emergency evacuation
- Accident/incident investigation
- Spills reporting procedure