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Hand auger - general

3 bytes removed, 01:17, 1 June 2012

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| valign="top" | - Easy to use above the groundwater table <br>

| valign="top" | <br>

|-

| valign="top" | - It may be very difficult to remove the temporary casing. If clay layers are penetrated, it is very difficult to use a temporary casing, as it sticks to the clay. <br>

| valign="top" |- The borehole does not stay open if a collapsing sand layer is encountered below a clay layer (through which the temporary casing could not penetrate)

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Winona

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