QUESTION: In previous articles in Pumper and Onsite Installer, soil sizing charts were mentioned that identify rapid perc rate, fine sandy soils as being comparable to loamy soils in sizing capacities and treatment capabilities. Our state of Nebraska is reviewing several possible regulation changes and I would like to get the addition of a fine sand classification included in these changes. Our regulatory group was not aware of any research data to support the assumptions that the fine sands and loamy soils have the same treatment characteristics.
Our current regulations require soils with perc rates faster than 5 minutes per inch
