My plumber and I have determined that I have a high water table problem. He says a French Drain will solve it. The problem is that the house is surrounded by a concrete patio on the sides and backyard, and the concrete driveway takes up about 40% of the frontyard. I have a split-level house in California somewhat near a marsh. The family room and garage are slab. The kitchen dining room and living room are elevated. The water is seeping into the family room and