In trenchless installation, the geotechnical report should at least contain the following points [DIN18319:2000] [Scher99a] [GSTT5] [DCA01] [DINEN12889:2000]:

• Results of borings or drillings/probings (bore and probing profiles),

• Geophysical recordings,

• Geological logs,

• Characteristic soil values for structure planning,

• Maximum and minimum groundwater level,

• Degree of contamination of subsoil and groundwater by solids, gases and fluids,

• Conditions for disposal and waste recycling and removal

• Classification of the subsoil,

• Information on the ability for excavation/boring/drilling of the soil,

• Information on obstructions (e.g. cobbles, boulders, remains of foundations), fillings, cavities, foreign installations and military ordnance,

• Sticking potential,

• Aggressive influence of soil and groundwater.