Groundwater means all water, which is below the surface of the ground in the saturation zone and in direct contact with the ground or subsoil.
Soil means all unconsolidated mineral and organic material of any origin.
Underground source of drinking water (USDW) means an aquifer or its portion:
Water means the chemical element defined as H2O in any of its three natural states, liquid, solid and gaseous.
Topsoil means a varying depth (up to 300 mm) of the soil profile irrespective of the fertility, appearance, structure, agricultural potential, fertility and composition of the soil;