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Site Investigation

Constructive Evaluation has a team of experienced Geo-Environmental specialists, able to provide full Contaminated Land assessments or soil screening as necessary to fulfil the requirements of construction projects and to satisfy the planning process.

Insitu Testing

Our Geotechnical team are able to offer rapid mobilisation and reporting to fulfil insitu testing requirements for a variety of earthworks projects.

Our test teams include Engineering Geologists and Trained Technicians, all holding appropriate CSCS qualification and trained to work in Network Rail (PTS) and London Underground (ICI-LUL) environments.

Please contact Shaun Gilbrook at our Head Office to discuss your insitu testing requirements.

Our services include:


California Bearing Ratio

  • Clegg Impact Tester

  • Dynamic Cone Penetrometer

  • Vehicle Mounted Type

Infiltration Testing

  • BRE 365 Soakaway Testing

  • Falling Head Permeability Testing

  • Percolation Testing to BS6297 (Field Drainage)

Plate Bearing Test

  • Plate sizes 150mm to 600mm

  • Testing below vehicle or using Bolt Down Frame

Geotechnical / Geo-Environmental Testing

  • Borehole gas and groundwater monitoring

  • Dynamic Probing Testing – Heavy (DPH) and Super Heavy (DPSH)

  • Hand Shear Vane and Pocket Penetrometer

  • Standard Penetration Testing (SPT)


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