Difficult to say without pictures and more information. How deep did they dig beside the foundation? Did they go all the way down to the bottom of the footing? Your foundation should have a perimeter drain down at the bottom of the wall or the bottom of the footing to keep any ground water from entering the basement.Another unrelated question: Friday they did some excavation near my house foundation. Over the weekend a decent amount of water started pooling where they excavated which increased over time. I was worried they hit a pipe, but they said that it was just water that was trapped at our foundation. Does this sound right
How close were they to the crushed stone that was installed to backfill the pool? It is possible that water is pooling in that crushed stone and heading towards the house. Have you pumped any water from the well point?
Did he leave you any ability to check the ground water level around the pool?
Is that 6-inch green pipe I see in the pictures where the well point is? if so can you run a tape measure down there and find where the water level is?