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4.     METHOD OF STABILIZING THE BOREHOLES




                •   Bentonite Slurry

                     •   Bentonite, a type of clay, is mixed with water to create a thick

                         slurry.


                     •   This slurry is then pumped into the borehole.

                     •   As it fills the hole, it coats the walls and prevents collapse.


                     •   Bentonite also helps maintain hydrostatic pressure to prevent
                         groundwater inflow.


                     •   Advantages: Effective in cohesive soils, easy to use, and readily

                         available.

                     •   Limitations: Less effective in coarse-grained or rocky soils.
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