In terms of the number of borings, the International Building Code (ICC, 2012) suggests a minimum of two (2) borings for built-over areas up to 5,000 square feet (sf), and at least one additional boring for each additional 2,500 sf of built-over areas up to 20,000 sf. For built-over areas larger than 20,000 sf, ICC (2012) suggests at least eight (8) borings plus at least one additional boring for each additional 5,000 sf. However, it is important to recognize that there is no single “correct” solution for the required number and depth of borings, and these guidelines must be tempered with appropriate engineering judgment.