What sort of foundations are needed for comapct sand with a water table of 100mm below ground

Thanks for helping

What area are you in?Frost line?Code specs?

How large is the load going to be on the footers?

what sort of foundations are needed for comapct sand with a water table of 100mm below ground

Engineered foundations.

Call an engineer.

It's the only way to get an answer to your query.