arpadveress 
Have you ever considered Ex as one of most relevant topics of general industries?
Examples you may find almost in every case:
- Cleaning wipes
- Charging of accus
- Chemical warehouse
- Wastewater network
- Metal machining
- …
All shall be considered Ex in a way. From that point on the same Ex routine shall be applied as per for an oil refinery.
Keep up good work!
Arpad
