The EarthBuster helps return soil conditions to preconstruction status. Smearing and compaction from construction equipment can leave soil in a drainfield with less-than-ideal absorption properties. The unit can be mounted on skid-steers, mini-excavators and loader tractors. The process uses compressed air, and when used properly, is environmentally safe, according to the maker. 406/670-8318; www.earthbuster.com.