2. Referenced Documents
D420 Guide to Site Characterization for Engineering Design and Construction Purposes
D653 Terminology Relating to Soil, Rock, and Contained Fluids
D2488 Practice for Description and Identification of Soils (Visual-Manual Procedure)
D5731 Test Method for Determination of the Point Load Strength Index of Rock and Application to Rock Strength Classifications
D5873 Test Method for Determination of Rock Hardness by Rebound Hammer Method
D6026 Practice for Using Significant Digits in Geotechnical Data