8611 Clearing and grubbing (0) Clearing, removing and disposing of vegetation and rubbish 8612 Bulk earthworks (0) All significant earthworks in land and site development including clearing, stripping, excavating, cutting and the construction of earth fills to the subgrade level of building platforms, roads and pavements, importing of fill materials and removal and disposal of waste items 8613 Formation (0) Construction of road and pavement sub-grades and undercuts, subgrade that layer of material usually down to 500mm below formation level. Top of subgrade is formation level. 8616 Stabilisation (1) Stabilisation of subgrade and pavement, usually relates to the mixing in place of soil, lime and water. Includes mixing, curing, compacting and watering the mixture.