NCGS Ground Hazards
Signs of unstable or contaminated ground at a planting area; a site on the Highveld’s coalfields may be undermined.
Ash or slag
Ash, clinker or slag from industry or burning in the soil.
Cracks in the ground
Open cracks in the soil surface that are not from drying alone.
Deep or uncontrolled fill
Ground built up with dumped material of unknown depth.
Depressions
Hollows or dips where the ground has sunk.
Mine-related subsidence
Ground sinking over old mine workings.
None seen
No sign of unstable or contaminated ground.
Suspected contaminated fill
Fill that smells, is oily, or holds waste that may be toxic.
Unusual soil discolouration
Soil stained or coloured unlike the soil around it.