As it turns out the previously mentioned pipe turns out to be an old 5 foot piece of 2.5" pvc that was half under the old concrete slab at the doorway with the other half just covered by dirt and gravel. The pipe was sitting on gravel and was atop plastic and parallel to the house against the foundation. It looks like it was intentionally laid this way. The thing is the pipe does not connect to anything. It's just 5 feet of pipe lating there. I can remove it.
Which brings me to the next problem. Why is there water pooling against the foundation. Granted, it's below the level of the basement floor, but I'm not sure that I can lay a patio atop it. Does this water pooling suggest that the drain tile is not working correctly or is this a natural type of occurence? next, can I safely put a paver on top of it? The water doesn't seem to get any higher than a certain level. Even if I try to fill the hole it seems to seep in the ground. It doesn't rise. For patio purposes I suppose I could back fill the hole with gravel, pack it - that would get me about 10", then the subbase of the patio wouldbe another 5" with a 1" sand base and 2.5" paver stone.
I'm at a loss here.