Pan american center for sanitary engineering

1.- Introducction. 2.- Physiochemical modification of groudwater. 3.- Importance of hydrogeological complexeti for sampling. 4.- Common sapling methos and theier limitations. 5.- Developments in borehole sapling pumps. 6.- Improved techniques for sampling from existin boreholes. 7.- Monitoring boreholes: deinsn and installation.8.- Unsatuirated zone monitoring. 9.- Grounwater monitoring programs. 10.- Concluding sratement

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