AASHTO R 21:1996(R2023)
Current
Current
The latest, up-to-date edition.
Standard Practice for Drilling for Subsurface Investigations—Unexpectedly Encountering Suspected Hazardous Material
Available format(s)
Hardcopy , PDF
Language(s)
English
Published date
01-01-2023
Excluding VAT
This practice is intended to help protect drillers in the event they unexpectedly encounter suspected hazardous materials while performing subsurface investigations.
| DocumentType |
Standard Practice
|
| Pages |
3
|
| PublisherName |
American Association of State Highway and Transportation Officials
|
| Status |
Current
|
| Supersedes |
Summarise