Aimee:
When they poured the decking, was the rebar in the decking tied to the pool's bonding circuit? If not, it could be the problem. I take it that the shock occurs when you are touching the deck with one body part while entering the water? If so, there is a voltage gradient between the two, meaning that the deck and the pool and its water are not electrically connected. If the people who installed the deck were not the same as the pool builders, you will need to call the deck installer out.
Another thing to check... on the pool's pump, heater, or any other electrified equipment in which water flows through, you should see a bonding connection and a copper wire connected to the "bonding lug." This would likely be on the outside of the pump and is not the same thing as the green equipment grounding wire inside the wiring terminal. If you don't see these bonding wires, then the bonding was definitely not done properly and you will need to have your pool builder come out to deal with it.
Regardless of any stray potential in the ground, the bonding grid should prevent you from experiencing any stray voltage in or around the pool, but only if it's all tied together.
When they poured the decking, was the rebar in the decking tied to the pool's bonding circuit? If not, it could be the problem. I take it that the shock occurs when you are touching the deck with one body part while entering the water? If so, there is a voltage gradient between the two, meaning that the deck and the pool and its water are not electrically connected. If the people who installed the deck were not the same as the pool builders, you will need to call the deck installer out.
Another thing to check... on the pool's pump, heater, or any other electrified equipment in which water flows through, you should see a bonding connection and a copper wire connected to the "bonding lug." This would likely be on the outside of the pump and is not the same thing as the green equipment grounding wire inside the wiring terminal. If you don't see these bonding wires, then the bonding was definitely not done properly and you will need to have your pool builder come out to deal with it.
Regardless of any stray potential in the ground, the bonding grid should prevent you from experiencing any stray voltage in or around the pool, but only if it's all tied together.