As we travel and talk about good installation principles, we often hear questions about why installers need to know their soils. Last month we said it’s important for installers to know soils so they can determine whether there is proper separation between the infiltrative surface of the system and any limiting soil condition.It is also important to recognize soil textures and to understand the relationship between soil type or classification in your state’s rules and the size of treatment unit needed. Let’s look at the general principles a little more closely and see how a better understanding of soil and
