Above is equipment used to retrieve Cores from ground for testing

Example Report

Click the image below for a larger example Permeability Report Bearing Test Report

Landfill Site Testing


Permeability Test

The main purpose of this test is listed below:-

  • Knowledge of the permeability characteristics of soil is required for many construction projects in which drainage is an important feature.
  • In many applications the use of a flow-net analysis together with permeability data, enables the rate of seepage of water through or under a structure to be estimated, and seepage pressures to be calculated.
  • Permeability is a major parameter used in the design and assessment of land fill sites and the investigation of contaminated ground. because of its effect on leachate production.


This test method covers the determination of the coefficient of permeability by a constant-head method for the laminar flow of water through granular soils. The procedure is to establish representative values of the coefficient of permeability of granular soils that may occur in natural deposits as placed in embankments, or when used as base courses under pavements. In order to limit consolidation influences during testings.

Sand replacement tests

The main uses of the sand replacement test are listed below :-

  • The visual inspection of in-situ soil conditions.
  • The detailed examination of soil variability, structure and weathering profile.
  • Assessing the ease of excavation for construction cost estimation and determining.
  • Many civil engineering projects require the use of in-situ 'fill' material. Whenever soil is placed as an engineering fill, it is usually compacted to a dense state, to obtain satisfactory engineering properties.
A GSTL Technician carrying out Sand Replacement Density Test