Changes

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|align="center" valign="top"| {{Icon|file=rota_sludge_well_drilling_icon.png|alt=Understanding groundwater and wells|width=94|link=Understanding groundwater and wells}} <br> [[Understanding groundwater and wells]]

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|align="center" valign="top"| {{Icon|file=rota_sludge_well_drilling_icon.png|alt=Manual drilling general|width=94|link=Manual drilling general}} <br> [[Manual drilling general]]

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|align="center" valign="top"| {{Icon|file=rota_sludge_well_drilling_icon.png|alt=Hand auger - general|width=94|link=Hand auger - general}} <br> [[Hand auger - general]]