High water table under our house? It's on a hill
Hi please help! We bought a house on a hill in NJ last winter. There are houses on our upper slope and also houses down slope.
During the really wet season this summer, our basement got damp, a small section even got water, like 1/8 inch deep. So we installed an interior french drain and a sump pump. After that, it's dry again, but only that the pump keeps pumping water out every 10-20 minutes.
During the Hurricane Sandy, we lost power for 12 days. This gave us a chance of stopping the sump. We saw that after 2 days, the water level in that pit was stabilized at around 10 inches below the slab surface and it has been at around that level during the last few days - maybe one inch lower but definitely not much - the pump was still submerged under the water.
Is this where the water table level is? I don't understand how come a house on a hill can still have high water table: why the water doesn't go to our neighbors property, there are plenty of them down slope..
And how do I fix this problem? If we need to dig an exterior french drain, we will have to dig really really deep - like 8 feet.
Any advice will be much appreciated!