Soil Laboratory

Soil Laboratory

CATLIN’s In-House Geotechnical Laboratory supports our engineering services for the evaluation of soil integrity. Our laboratory is located in Wilmington, NC and is certified by the North Carolina Department of Transportation (NCDOT).

We use ASTM and AASHTO methods to complete the following tests:

  • Visual Classification
  • Particle Size Analysis with Hydrometer
  • Grain Size Analysis
  • Wash 200 Sieve Analysis
  • Standard Proctor
  • Modified Proctor
  • California Bearing Ratio (CBR)
  • Specific Gravity
  • Moisture Content
  • Liquid Limit, Plastic Limit, Plasticity Index (Atterberg Limits)
  • Hydraulic Conductivity (Triaxial Flexible Wall Permeability)
  • Permeability of Granular Soils
  • Bulk Density & Porosity Determination
  • Organic Content


NCDOT Certified Soil Laboratory
NCDEQ Division of Water Resources Field Parameters Certification