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Site History The new A30 passes through the site of the former Deep Tye Farm Landfill. Operational to 1994 the landfill was licensed for the disposal of inert wastes. Covering an area of 25,000m2, the landfill was a mixture of buildings and construction waste to a maximum depth of 5.6 metres. Analysis of soil and water samples revealed elevated levels of iron, ammoniacal nitrogen and petroleum hydrocarbons. The Construction of the new carriageway required the excavation of the landfill material and formation of the new cutting.
Site Works
The scope of works was as follows:
- Installation of ex-situ water treatment system and gaining of discharge consent for treated waters.
- Liaison with all regulatory authorities.
- Strip site of vegetation and re-useable topsoil.
- Cutting excavation of 18,000m3 of subsoil and landfill material.
- Processing of all excavated material – crushing, screening, sorting, ex-situ biological treatment – to generate material suitable for re-use on site as fill to structures.
- Disposal from site of any materials structurally unsuitable for incorporation within the works.
- Installation of gas collector drains.
- Reinstatement of all disturbed land.
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