I thought this was isloated to just one area. The hydralic cement worked great. The trick is to dig out the hole deeper than the opening so when the cement dries it will really seal the space. I used Drylock Paint to cover which has a latex sandy substance which soaks into the cement pours.
After a few months, the fall rainy season set in and I was suprised to see how much more work I need to do. Back to the chizzil. Have fun!