Single Ring Infiltration Testing is a method by which a solid pipe is pushed into the ground to form a tight seal. The pipe should be pushed into the ground at the approximate location and elevation of the planned infiltration system. Water is added inside of the pipe to pre-soak the soil and achieve a saturated condition to allow for laminar flow. Once the soil is fully saturated the pipe should be filled to a level of 12 to 36 inches above the bottom of the pipe (depending on specifications and soil conditions). The elevation of the water in the pipe should be regularly measured at carefully recorded time intervals, and the water level should be kept reasonably the same throughout the test by refilling as needed. Once the rate of water level drop has stabilized the test is complete.
