I have purchased a small home that is on a slab. After noticing a hump in the floor and a dark area on the linoleum I pulled up the linolium to investigate. The previous owner added a bathroom on the other side of the house. In order to get water there and waste water away he cut a trench in the floor and put in hot and cold waterlines and a 3" sewer line. The concrete he poured(4") heaved in several areas. There was mold on the bottom of the linolium.
I busted up a ten foot section and dug down about 2 feet to find the mentioned lines/sewer. there was standing water in the hole. the water subsided during the next few days. After a good rain the water in the trench rose about 2". Then subsided.
The water lines have continuos pressure, so I assume the water is not coming from them, as the water would continue to rise.
The gutters were plugged solid when I first got the place. There is good fall away from the house. The down spouts are intact and flow out to the street when I put a hose down them. I have run the water into the sewer line for 4 hours. This did not make the water rise. The last rain did not effect the water level((just a dribble. All the duct work is in the floor, they all have a small amount of water at the bottom.
I have dug a hole on the outside of the house along the footer in the area of concern, have not gotten down all the way yet, but so far its dry as a bone.
Any Ideas, I am stumped. I do not want to put it back together ubntil im sure what the problem is.
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