The soil profile at a road construction site is as shown in figure (not to scale). A large embankment is to be constructed at the site. The ground water table $\text{(GWT)}$ is located at the surface of the clay layer, and the capillary rise in the sandy soil is negligible. The effective stress at the middle of the clay layer after the application of the embankment loading is $180\text{ kN/m}^{2}$. Take unit weight of water, $ \gamma_w = 9.81 \text{ kN/m}^{3}$.
The primary consolidation settlement (in $\text{m}$, $\textit{round off to two decimal places}$) of the clay layer resulting from this loading will be _____________________
