Abstract: Injection systems and processes may improve earth stability of a site. In one implementation, an injection system and process include the ability to insert an array of liquid-conveying probes into the ground of a site to a predetermined depth, the probes spaced substantially less than five feet apart from each other, and to supply a predominantly-aqueous solution to the probes. The system and process also include the ability to insert the probes a predetermined further distance into the ground and supply additional solution.