4. Methodology
This study was conducted with Asia Arsenic Network (AAN) in Ukhia
Upazila, Cox’s Bazar, Bangladesh. This work was run under the technical
support of DPHE, Bangladesh. AAN was installed two pumping well in the
study area. The field survey was provided water static table and higher
depths of water level, elevations of ground, lithological and hydro
chemical data of step-drawdown well tests the well No 2 and 4. These two
wells was installed for the improvement of existing safe water supply
systems. Identification of safe water, actual well construction,
regulation of pumping rate, step drawdown, static water table,
lithologic and geophysical setting were monitored during and before the
drilling activities.