A friend of mine runs a martial arts studio where his concrete-floored office in the back is slightly below grade and floods every time it rains.
I assume that a proper solution would presumably involve re-leveling the floor to slope towards a central point, and then placing a drain at that low point. But the chance of this happening is zero-- it's a rental space and very low-budget and the landlord is not going to do anything. So it's up to my friend to figure out a solution. Today the solution is mop and bucket. Not good.
Are there standalone pumps that can be left on the floor that will suck up standing water? I assume a big difference between a standalone pump and a "drop in a hole" sump pump is that the standalone one has to be heavy enough on the bottom so that it won't tip over easily.
There's not that much water-- probably 10 gallons/hr in the heaviest storms, much less under normal conditions.
It doesn't need to be perfect, just needs to prevent flooding so he can get through a 90-minute class without mop duty.