TDS PDF

Standard Practice for Procedures for Measuring Highway Noise Original standard AASHTO R 20-99 (2017) in PDF full version. Additional info + preview on request

Document status: Replaced by St AASHTO R 20-99 (2025)

Standard Practice for Drilling for Subsurface Investigations—Unexpectedly Encountering Suspected Hazardous Material Original standard AASHTO R 21-96 (2019) in PDF full version. Additional info + preview on request

Document status: Replaced by St AASHTO R 21-96 (2023)

Standard Practice for Decommissioning Geotechnical Exploratory Boreholes Original standard AASHTO R 22-97 (2019) in PDF full version. Additional info + preview on request

Document status: Replaced by St AASHTO R 22-97 (2023)

Standard Practice for Chemical, Biological, and Physical Analysis of Water Original standard AASHTO R 23-99 (2018) in PDF full version. Additional info + preview on request

Document status: Replaced by St AASHTO R 23-99 (2026)

Standard Practice for Collection and Preservation of Water Samples Original standard AASHTO R 24-99 (2018) in PDF full version. Additional info + preview on request

Document status: Replaced by St AASHTO R 24-99 (2026)

Standard Practice for Technician Training and Certification Programs Original standard AASHTO R 25-19 in PDF full version. Additional info + preview on request

Document status: Replaced by St AASHTO R 25-22 (2026)