Do you know where your drain field is located in your yard? Its important to have a good idea just where that drain field is located, so you can be sure that it is not damaged by excavations of the soil or plant life. One of the biggest problems a drain field can encounter is the roots from an errant plant, such as a tree, or hyper aggressive rose bush. For every foot of foliage you see above the ground you can bet that there is also a foot worth of roots beneath the ground. Those roots are hunting, and homing in on the best sources of nutrients and water that they can find, such as your drain field.
Its important to understand what a septic tank actually is, and is not. What a septic tank isn’t is a giant storage tank that can hold 3 years worth of household wastewater and biological matter. Rather what it is happens to be a settling tank, to allow wastewater to separate from the solids and be carried away to the field lines where it dissipates into the ground. And as for the solids, many of those break down from the aerobic and anaerobic processes of biological assimilation. Helpful bacterial living in our septic tanks can create favorable environment for these solids to become liquids, as most biological matter is like human flesh primarily liquid to start with.
Do you love that mighty oak tree sitting in the backyard, or perhaps the Bradford pear tree that has never looked healthier? The reason these plants are in such great shape is that they may very well have a few roots down in you field line chambers. The plants go where the nutrients are, and the biological cycle of bacteria breaking down human waste and kitchen sink water is a rich source of nitrogen that your trees and shrubs will be attracted to like a magnet. Be aware of how close those trees are to the field lines, and if you have to be prepared to sacrifice that tree, because it will be a lot cheaper than replacing your field lines.