Before borehole drilling starts, a hydrogeological survey must be conducted to assess ground water and identify aquifer. From this data, a conclusion/choice about a suitable drilling point can be made, taking care of depth and drilling method applicable.

A hydrogeological survey report is then written and submitted to the client, and a copy given to a driller. This report is also submitted to Water Resources Authority (WRA) for obtaining a drilling permit.

Key technical reasons for conducting hydrogeological survey;