what does select of foundation depend on ?' for example if under the foundation you get CL or CL-ML or ML soil types and water level is almost 10m-15 below NGC,

Question

As Mr. Haseeb has answered to 'Which Type of foundations are commonly used' but I have another question near this question, ' what does select of foundation depend on ?' for example if under the foundation you get CL or CL-ML or ML soil types and water level is almost 10m-15 below NGC,