||Drilling and Constructing Monitoring Wells with Hollow-Stem Augers. Part 1. Drilling Considerations (Journal Version).
Hackett, G. ;
||National Water Well Association, Dublin, OH.;Environmental Monitoring Systems Lab., Las Vegas, NV.
Water pollution ;
Ground water ;
Drilling machines(Tools) ;
Water quality ;
Well surveys ;
Hollow-stem auger drilling
||Some EPA libraries have a fiche copy filed under the call number shown.
||Advantages associated with hollow-stem auger drilling include rig mobility and versatility; the utility of the hollow stems for collection of representative samples of formation materials and for installation of monitoring wells; relatively fast advancement of the borehole in unconsolidated deposits; minimal formation damage in sands and gravels; minimal, if any, use of drilling fluids; and good control of drill cuttings. When drilling in heaving sands, if a positive pressure head of water cannot be maintained inside the auger column as described in the report, the use of hollow-stem augers for installation of a monitoring well may be limited. When monitoring the quality of ground water below a known contaminated zone, hollow-stem auger drilling may not be advisable unless protective surface casing can be installed. Procedures used to construct monitoring wells inside hollow-stem augers may depend on specific site conditions and the experience of the driller. To ensure an adequate working space, augers of appropriate inside diameter for the required size well casing and intake must be used.
||See also Part 2, PB89-119895. Sponsored by Environmental Monitoring Systems Lab., Las Vegas, NV.
||Pub. in Ground Water Monitoring Review, v7 n4 p51-62 1987.
|NTIS Title Notes
||Interim rept. Apr 86-May 87.
||Reprint: Drilling and Constructing Monitoring Wells with Hollow-Stem Augers. Part 1. Drilling Considerations (Journal Version).
||Not available NTIS