Our septic field had been leaking from the the fourth and sixth rows to the surface. We took a long time searching until we found a septic tank flushing company that recommended Tolson's for repair of septic drainage fields. Turns out the grandfather of the man who now owns and runs the company put the original field in when the house was built 40 years ago. They came out that day and immediately started looking for the distribution box, a cement box with the pipe from the septic tank coming in and six pipes, one for each row, going out. The cement had dissolved over time, dirt had gotten in and completely clogged two of the pipes, and water flowed mostly into the first and second pipes from the end. They put in two valves that worked to raise the water level so the other pipes could be recruited. Then they came back not long later and put in a whole new chamber of plastic with new pipes as roots had broken through two of the pipes leading out, making certain that all pipes were level so that no row would be overused and others underused. The leaks are now completely gone. I didn't know there was such a thing as a distribution box. I thought the whole field had to be replaced. Leonard, the owner and his crew are highly conscientious, competent and thorough. If you have or ever have a similar problem Tolson's are the people to call. read more