“Septic tank drain fields” is a term sometimes used to describe Absorption Fields.
They are fields that are used to take treated waste-water from a septic tank, and allow them to be further treated by the surrounding substrate, and slowing find its way into the water table.
For more information about septic fields, please see our Absorption Fields article.
Or, if you are looking for a contractor to handle all of your septic issues, just give Gogo Rooter Plumbing a call!