Fuel burning equipment means any furnace, boiler, apparatus, stack and all associated equipment, used in the process of burning fuel.
Infiltrative surface means designated interface where effluent moves from distribution media or a distribution product into treatment media or original soil. In standard trench or bed systems this will be the interface of the distribution media or product and in-situ soil. Two separate infiltrative surfaces will exist in a mound system and an unlined sand filter, one at the interface of the distribution media and fill sand, the other at the interface of the fill sand and in-situ soil.
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;
Impervious area means any surface that does not allow stormwater to infiltrate into the ground.
Impervious surface means a surface that has been covered with a layer of material so that it is highly resistant to infiltration by water.