7500-15000 feet below the dirt surface, whether air or water lies above that.
32K feet of water may change the pressure/temperature map slightly for that deposit, but it is depth below the solid surface that most counts.

Thanks. I realised it would be the depth below the solid surface that mostly counted but thought it was around 7,000 feet deep but carelessly didn't mention that:-( so the water must be deeper then i thought.