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6. SAMPLING IN BOREHOLES



                  1. Disturbed Sample (DS)

                       •    Split – spoon sampler

                  2. Undisturbed Sample (UD)


                      •     Thin-walled tube sampler

                      •     Thin-walled Stationary Piston Sampler

                      •     Mazier sampler                                                          450mm length of Disturbed Sample

                  3. Collection of Groundwater sample











       U2.5 dia. UD sample using
        Thin-walled tube sampler
            with length of 750mm
                                                                                               74mm dia. Mazier Sample with 1m length
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