As discussed last month, the two major soil characteristics determining the required size of the soil treatment area are soil texture and structure. They impact the size of the system and are important in providing treatment. It also bears repeating that other system sizing factors are daily sewage flow and composition of the wastewater. So, recognize in this discussion that the size of the system is impacted by other factors.
Soil texture is simply based on the size of the individual soil particles. The USDA classification system designates 12 texture classes of sand, silt and clay particle sizes. It is important
