Reference Document - RAL25/0020 & OPW25/0194 (As Published)

                                                                           Terminology
Sampling, Testing and                                                         Symbols
Excavation Methodology                                                    Abbreviations



Drilling or Excavation Methods/Tools
The drilling/excavation methods used to perform
the investigation may be shown either in a
dedicated column down the left-hand edge of
the log, or stated in the log footer. In some
circumstances abbreviation codes may be used.

                  Method                    Abbreviation
                                               Code
    Direct Push                             `DP`
    Solid flight auger. Suffixes:            AD1`
      /T` = tungsten carbide tip,
      /V` = v-shaped tip
    Air Track                               `AT`
    Diatube                                 `DT1`
    Hand auger                              `HA1`
    Hand tools (unspecified)                `HAND`
    Existing exposure                       `X`
    Hollow flight auger                     `HSA1`
    HQ coring                               `HQ3`
    HMLC series coring                      `HMLC`
    NMLC series coring                      `NMLC`
    NQ coring                               `NQ3`
    PQ coring                               `PQ3`
    Predrilled                              `PD`
    Push tube                               `PT1`
    Ripping tyne/ripper                     `R`
    Rock roller                             `RR1`
    Rock breaker/hydraulic                  `EH`
    hammer
    Sonic drilling                          `SON1`
    Mud/blade bucket                        `MB1`
    Toothed bucket                          `TB1`
    Vibrocore                               `VC1`
    Vacuum excavation                       `VE`
    Wash bore                               `WB1`
    (unspecified bit type)
1
    – numeric suffixes indicate tool diameter/width in mm




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