A solid foundation is the cornerstone of any successful construction project. In order to create a sustainable base for your build, you have to analyze the exact qualities and engineering parameters of the soil at your intended site. Understanding the elements and conditions present at your site will help to chart the course for the rest of the project. So, what is soil testing? Soil testing is when a geotechnical engineer visits your site to acquire and test soil samples. Tests will reveal the characteristics, nature, and reactivity of soil.