Im all for doing some dirty work when needed, but if they expect 100% uptime they should be ready for something as common as a storm flood without risking injuries hauling fuel drums by hand.
If you drop back to 30m of lift, you get still have 36PSI which is enough to get some flow. But that means that you need a holding tank (or lots of buckets) and another pump for another 30m of lift. That gets you to the 16th floor so you need another holding tank and a another pump.
That's a lot of complication. And getting those pumps to sit still can be a challenge.
Or you could label it Hyrox/Crossfit/$FITNESSTREND and charge people money to do it. #barrelpump #verticalmarathon #fitnessgoals #blessed