Incompatible dangerous goods truck unloading area design

[SeanChemEng]

Hi,

I have been tasked with designing a road tanker unloading area for three different bulk chemicals. The chemicals are:
- Ferrous Chloride solution (approx 10% w/w HCl)
- Sodium Hydroxide solution 50% w/w
- Sulfuric acid 98% w/w

There currently exists an outside bunded truck unloading area (sealed and drained) with a camlock unloading point for the sulfuric acid. It is my intention to include similar unloading points for the other two chemicals within this same bunded area. These unloading points will be within 5m of each other with only one chemical being unloaded at any one time. Note that the onboard tanker pump will be used to offload the chemicals with the pump power source being supplied by me.

The problems I need to resolve are the following:
1) Prevent a chemical being unloaded into the wrong unloading point.
2) Prevention of storage tank overfilling through a power cut-off to the tanker pump. This will operate off the existing high level alarm.

I was considering installing three seperate pump power supplies, with each linked to a chemical's high level alarm.

I would assume this situation occurs often in other chemical plants, how have other people designed this safely?

 

[Chance17]

I have tackled incompatible product unloading issues by using dedicated hoses & connections.
Each product had a uniquely different hose and connections.
No chance to connect product "A" to a product "B" tank.
My experience is on a rail car rack.
It was easy to get dedicated rail cars with unique fittings.
Your application may be more difficult due to trucks & commodity chemicals.

The overfilling protection is an Industry standard for flammables.
The protection is not very common for chemicals you listed.