Looks like mumbo jumbo to me, but who knows, maybe it works. It is basically back flushing the leach field and disrupting the soil, I just don't know how the field doesn't just clog up again in short order.
Here's something of a "logic tree" as to why things go wrong--along with an explanation for why pneumatic soil fracturing is a very good INGREDIENT in the recipe for successful septic rejuvenation.
When a system fails, it is either 1) poorly designed, 2) broken, or 3) poorly maintained.
1. If it's poorly designed, it may either be wholly inadequate from day one, or it could be that it is barely adequate if well-maintained. If it's the latter, the homeowner can manage to get by, but only with lots of care. If it's inadequate from day one, it simply needs to be replaced, amended, or rebuilt.
2. If the system is broken, then it needs to be fixed. This would include fixing broken pipes, re-leveling the D box, etc.
3. If it is poorly maintained, this is where the number of possibilities increase significantly. The bacterial processes in a well-designed, healthy, and well-maintained system should be adequate to break down the sewage at a faster rate than it is deposited into the system. That is, the solids break down into liquids, are distributed through the drain field, and from there, leach into the soil where they become inert. A system like this can last 20-30 years, or even longer, without any need for rebuilding or replacement. What makes it go wrong is generally:
+++ Introduction of things that should not be in a septic system. (Bleach, water softener, trash and other non-disolvable, non-human-waste item, etc.) These things can 1) physically clog the system, and 2) kill the bacteria that are needed for the speedy liquefying of solids. Replacing the drain field in such a case simply gives the homeowner a new system to clog up with the same bad habits. The best "repair" in this case is to fix the homeowner---that is, to get him or her to stop introducing those things into the system. Then rejuvenate the existing system, and everything will be OK. +++
When such a system is being serviced, you can service just the tank (pumping out the undissolved sludge and the trash), or you can tackle the drain lines, too (jetting, etc.). Or---and this is the best solution---you can take the COMPLETE approach, which includes also treating the drain field itself, remediating the buildup of "biomass"---the black, slimy "mat" that forms inside the drain field, acting something like a waterproof pool liner. It keeps the water from slowing away laterally. Instead, it's a bit like having an underground swimming pool with side walls. Yes, that pool is filled with dirt and gravel, but it has standing water in it, and that water will eventually reach the surface once enough has accumulated, because it has nowhere else to go.
The best relief for the biomat (or biomass) is pneumatic soil fracturing. It simply is not necessary to replace the field, because if the biomat is broken up and aerated, it will NATURALLY dissolve to a point where the drain field can drain properly again. Can you foul that up again by continuing to add bad things into the septic system? Sure you can---just like you can foul up a brand new septic system in the same way. The only difference is the amount of time it takes to foul up a system to the point of failure. On a brand new system, it may take some years to get it to fail by mistreating it, where a system that has been treated with a soil fracturing machine (Such as EarthBuster or Terralift) will begin to HEAL immediately, but requires that the abuse be stopped so that it can continue to heal completely in time.
So again, the first thing to "fix" is the homeowner---get them to stop introducing the wrong things into the system.
Then clean the system and rejuvenate the drain field with pneumatic soil fracturing. The biomat will recede and the absorption of the drain field will be restored. The results are immediate---in just minutes of beginning the pneumatic soil fracturing process, you can generally see gurgling in the septic tank, as well as at the surface where the effluent (the nasty liquid) is emerging from the ground. Not only can the water now pass through the fractured biomat, but so can air, which contains the oxygen necessary for the full-speed bacterial breakdown of the solids in the septic tank.
Early fracturing units like the walk-behind Terralift are still useful for drain field rejuvenation, while even better/faster results are gained from the tractor-mounted EarthBuster. The EarthBuster is much more efficient, bringing greater power and speed, helping the operator to get the job done much easier. Regardless, you'll be best served by a contractor who understands WHY systems fail, and who knows how to treat ALL of it, rather than one who simply wants to make a quick buck by simply pumping your tank every few months, or merely poking some holes in your yard.