We have good success with seepage pits. See the WEB page "What does Septic Scrub Do?" for instructions regarding the addition to seepage pits. If you have any questions, please do not hesitate to call. 

The use of caustic has a long tradition. Caustic and sulfuric acid have been used to restore the flow in slow running systems. Sulfuric acid works by oxidizing everything in the system, including the soil structure. Almost every system treated with sulfuric acid eventually fails. Caustic works somewhat in the same way. It reacts with sugars, fats, and oils and makes a soap. This is much the same type of chemistry that is used to make soaps. The problem here is that the soil structure is also damaged. This leads to further slowing, more treatments and eventual total failure. Septic Scrub is a more selective oxidizing agent. It does not react with the soil structure. It reacts with only the byproducts of anaerobic bacteria. This treatment removes the sulfides and polysaccarides from the biomat. It also releases oxygen which helps aerobic bacteria regenerate. The more aerobic this biomat stays, the better the drainfield works. 

We have had good success in restoring seepage pits. The best treatment is to pump the pit and break up the anaerobic crust which generally forms on the bottom of the pit. This allows the Septic Scrub to get under this crust and work on it from both sides. If a pit is worming properly, it should remain essentially dry. Each day's water should be absorbed into the ground. Most of this absorption is through the bottom of the pit. A successful treatment can help prolong the life of a pit significantly. I do not know however how effective Septic Scrub will be on a pit which has had several caustic treatments in the past. The soil may be too damaged to restore.