WHEN IS A PERCOLATION TEST ACCEPTABLE? WHEN IS AN ASTM SOILS ANALYSIS RQUIRED?
These two methods of examining the subsurface conditions of a proposed septic site determine the native soils’ ability to treat and remove liquid effluent. Per AAC 18-9-A310(D)(3)(b), a percolation test is acceptable except where the specified limiting conditions occur, in which case, a full ASTM soils analysis is required.