Surface barriers definition
Surface barriers means the plasticizing of walls, floors, and fixed objects within the work area to prevent contamination from subsequent work.
Surface waters means water on the surface of the ground where water does not usually accumulate in ordinary watercourses, lakes, or ponds. This includes any waterborne objects.
Surface water means all water which is open to the atmosphere and subject to surface runoff.
Drainage area means a geographic area within which stormwater, sediments, or dissolved materials drain to a particular receiving waterbody or to a particular point along a receiving waterbody.
Barrier means Barrier Level x R (initial).
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;