cover index and engineering properties such as compaction, Atterberg limits, grain size distribution, triaxial shear strength, CBR, consolidation, and permeability. RSA Geolab also offers hydraulic conductivity and transmissivity testing to evaluate fluid flow through soils and drainage layers, as well as direct shear and interface shear testing for slope stability and liner system design. Clients include engineers, contractors, manufacturers, and regulatory agencies that require ASTM, AASHTO, GRI, and USACE-aligned data for design, quality control, and compliance documentation.