Apparatus and method for applying a soil treatment beneath the surface of the ground

Apparatus for applying a soil treatment, the apparatus being selectively operable between a first pressure mode and a second pressure mode, the apparatus comprising:

• a first pressure application tool operable to inject soil treatment under a first pressure into the soil in the first pressure mode of the apparatus;
• a second pressure application tool discrete from the first pressure application tool and operable to apply soil treatment under second pressure to the soil in the second pressure mode of the apparatus, the second pressure being substantially lower than the first pressure of the first pressure mode of the apparatus;
• and
• a base unit in fluid communication with the first pressure application tool in the first pressure mode of the apparatus and operable in the first pressure mode to deliver pressurized fluid to the first pressure application tool for operation of the first pressure application tool, the base unit being in fluid communication with the second pressure application tool in the second pressure mode of the apparatus and operable in the second pressure mode to deliver fluid to the second pressure application tool at a substantially lower pressure than in the first pressure mode, the first pressure application tool and the second pressure application tool each being respectively positionable relative to the base unit, said base unit, first pressure application tool and second pressure application tool being configured relative to each other such that the second pressure application tool is inoperable when the first pressure application tool is operating and the first pressure application tool is inoperable when the second pressure application tool is operating.