I don't think the pool bond wire is connected to the equipment ground anywhere, but NEC says this is not required so I think that aspect of the install is OK.
So, the pump has an EGC to the panel. But it also has a bond screw on the canister that I'm not sure how to terminate.
I'm not even sure where you would start chipping concrete. I sure wouldn't want to own a cracked pool shell and the deck may not even have any metal in it. Before I did that I would carefully dig around the edge of the deck, looking for some stub outs of #8 solid. Was this pool inspected when it was shot? If you do find some #8 that looks like it is connected to the steel you can split bolt off of it and run to your pump. These pool guys usually barely get the #8 under the sod so it shouldn't be that deep when you are looking for it. You can probably just drag a 6" screwdriver in the dirt around the slab to find it.
