AASHTO R 21-1996
Standard Practice for Drilling for Subsurface Investigations桿nexpectedly Encountering Suspected Hazardous Material

Standard No.

AASHTO R 21-1996

Release Date

1996

Published By

The American Road & Transportation Builders Association

Latest

AASHTO R 21-1996

Scope

This practice is intended to help protect drillers in the event they unexpectedly encounter suspected hazardous materials while performing subsurface investigations. This is accomplished by training the drillers, identifying precautions to minimize risk

AASHTO R 21-1996 history

• 1996 AASHTO R 21-1996 Standard Practice for Drilling for Subsurface Investigations桿nexpectedly Encountering Suspected Hazardous Material