This is a plan of the mapped underground water content.
Bit confusing but there is a section either side showing the 5 levels of strata in the cover.
Look at the orange above the purple that is the lower aquifer.
The table on the right shows how much water is to be drawn down and the orange is on the low side.
The bore holes are positioned in the high zone dark blue around the Decline shown dotted.
P90 is a high estimate P10 is a low estimate, a later assessment shows it on the low end of these estimates.
The section above shows a graph of the drawdown amounts with the 2 estimates.
The blue is potentially reusable water and the brown the saline water out of the lower aquifer, the brown does increase as the Decline goes lower off the right hand side