Part C - Minimum Requirements on geotechnical investigations 
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4.2.2.2 Laboratory tests 
The results of laboratory tests shall be fully documented and described for each typical soil 
property (e.g. grain size distribution curves, compression test results, shear test results), so 
that any interested reader will be able to interpret the results. The test set-up has to be de 
scribed in each case. If standardised tests have been used, reference to the standard will be 
sufficient. 
The results of compression tests shall be provided in the form of pressure settlement curves 
and time settlement curves, with indication of load stages and consolidation times. Documen 
tation of the results shall also include data on equipment dimensions and the way of mounting 
the soil samples in the equipment. The results of soil strength tests shall be shown in con 
formity with applicable standards. 
The results of the laboratory tests shall be provided in the form of tables, sorted by borings, 
sampling depths, and sample numbers. 
4.2.3 Summary of investigation results (ground description) 
The results of the field and laboratory tests shall be compiled in a geotechnical site descrip 
tion forming part of the geotechnical site survey reports. 
Grain size distribution curves shall be combined to grain size bands of the main soil types 
where applicable. The ranges and mean characteristic values of the soil mechanical parame 
ters of the main soil types shall be indicated for each exploration point. These data, if reason 
able, should be compiled to establish typical foundation soil profiles for individual areas. If 
necessary, information should be provided regarding use of the characteristic soil mechanical 
parameters in the planned foundation design. 
4.2.4 General ground assessment 
The general ground assessment shall include an evaluation of the soil and subsoil properties 
at the project site with respect to its suitability for the construction of foundations for offshore 
structures, both with regard to load carrying properties and to the feasibility of different foun 
dation concepts. 
4.3 Soil and foundation expertise 
4.3.1 Content of soil and foundation expertises 
The soil and foundation expertise must contain at least the following as an independent part 
of the geotechnical report according to DIN 4020 in the respective project phases: 
• a general description of the site in geological and geotechnical terms, 
• notes regarding the spatial orientation of discontinuities, provided they are relevant, 
• the major construction data as foundation criteria, 
• the geotechnical site assessment with reference to construction measures, 
• a critical assessment of the findings regarding the findings listed in the geotechnical site 
survey report in coordination with the structural setup, 
• specification of design profiles, 
• determination of the soil characteristics and, if necessary, of the computation methods or 
computation model, 
• if applicable, information about obstructions to driving and suitable methods for piling and 
mudmat installation, 
• description of possible foundation designs including their geotechnical evaluation,