Approximately, 30,000 tubewells were tested throughout Araihazar with the Hach-kit by teams of workers from non-governmental organizations (NGOs) hired by the BAMWSP in 2002-2003.
Inter-calibration with laboratory measurements showed that field workers hired by the BAMWSP correctly identified the status of the vast majority of wells compared to the Bangladesh standard of 50 [micro]g/L for arsenic in drinking-water with the Hachkit in Araihazar (13).
The technology was modified in November 2005 to allow users to download and update the BAMWSP data through the Short Message Service (SMS) offered by local providers.
The CU/UD and BAMWSP surveys inventoried 2,205 wells in 2000-2001 and 2,396 wells in 2002-2003 in these villages respectively.
Significantly, the BAMWSP survey indicated that a number of deeper, safe wells were installed after the first survey was completed in these three villages and in Binair Char and Laskardi (Fig.
These are probably some recent and deeper wells that were subsequently tested by the BAMWSP in the same village, even if the reported depths did not exactly match (Fig.
79 on the basis of the subsequent BAMWSP survey (Fig 4a).
For access to the BAMWSP database, the unique geocode of a specific village must first be determined.