A perk test is a soil test that determines if the ground is compatible, the kind of septic tank needed and where it is to be located. The ground compatibility is important so field lines can drain liquid waste without causing quick sand or sink holes. Solid waste settles to the bottom of the septic tank while only liquid waste is drained through the field lines.™Field line drainage is of no harm to the environment, animals or plants. Field line drainage will reduce cost of watering your garden,…See More