This is the last in a series of four columns on site evaluation based on our presentations at the last Pumper & Cleaner Environmental Expo in February.One of the tools used for site evaluations in the past is the percolation test. This test has fallen into disfavor to determine soil hydraulic loading rates primarily. In fact, some states now do not allow the test to be used. We feel the test is still a useful tool to evaluate soil and can help resolve some problem situations. For instance, the percolation test is useful to evaluate the soil permeability relationship when
