Installing a new septic system on your property requires some careful planning along with mapping of the land. The key is to know both how big of a system you need and the constraints of your location so you choose the right type of septic system for your home.
The layout of your landscape and neighborhood can have a major impact on the site of the tank and the septic system you choose. For example, in some neighborhoods the location of houses, roads, water features, and rocky areas can give you little space suitable for a standard drain field, so a sand filtration system may be necessary, and it may impact the maximum size of the tank you have installed.
2. Property Size
Large properties have the benefit of plenty of room to install a septic tank and drain field well away from the main living areas of your land. On smaller properties, you have to get more creative simply because you have no place for your drain field. Some neighborhoods do have a shared or common area for drain field installations, but if that isn't an option, then an aerobic system that uses multiple tanks to break down effluent and minimize drain field needs may be necessary.
The slope of your property must be mapped so you can make sure that sewage won't flow into neighboring waterways or your neighbor's yard. Further, a tank and drain field typically need to be installed downslope from the house so that gravity can get the effluent where it needs to go. If your property has an insufficient slope, pumps may need to be integrated into your septic system in order to keep everything moving.
4. Soil Type
The soil in your septic drain field needs to be arable and relatively light. If it is heavily compacted or filled with clay, then the effluent can't properly percolate and filter through it. In extreme cases, a sand filtration system may be used instead of a full-size drain field, but often the soil in the drain field area can be reconditioned during installation in order to provide the necessary filtration.
5. Water Usage
The final main thing to consider is your household size and water usage patterns. Your septic tank contractor can help you determine your size needs by mapping out your family size and average water usage. It's always better to err on the larger size of tank system because overloading a tank can be expensive and damaging.
Contact a septic tank contractor for more help.