1. e1 Standard Practice for Thin-Walled Tube Sampling of Soils for Geotechnical Purposes;ASTM D1587–-00,2007
2. Standard Classification of Soils for Engineering Purposes (Unified Soil Classification System);ASTM D2487–-00,2000
3. Standard Test Method for Particle-Size Analysis of Soils;ASTM D422–-63,2002
4. Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils;ASTM D4318–-00,2000
5. Standard Test Methods for Specific Gravity of Soil Solids by Water Pycnometer;ASTM D854–-02,2002