A day tank? For a ship? The tank is one part of the points. We have some tanks that size as main tank for diesel fuel.
They are made of weld Stainless Steel 316 L and placed vertically.
For safety reasons the are made out of separate tanks with separate valves, although in use all paralled.
The material is 1,2 mm thick - height 2 meter.
Inside these
walls are connected to not bulb out too much and to dampen the fuel movements in rough seas.
You'll need a fuel return and air pipe too. If it is for diesel and it stays long in there and for engines, you can also make a filter system to keep the algae out.
When segmented you'll limit the spill, if detected.
Our are now 16 years old and required no maintenance or repairs. We have 8000 liter over 4 tanks that look like one single.
Aluminium or steel will work also, but the thickness
should be adapted. (5 mm alu min. 3 mm steel min- if reinforced and split as described)
I hope this is of any help to you.