basement odor near sump hole
I live in a walkout, split level home on a slab with a sump hole under the steps leading to the lower level. The hole has been dry since I moved in 4 years ago and it has 2 lines coming into it. There is no pump or even electrical in that location so there was never a pump there. Last week we started getting a strong musty smell from under the steps. The pump hole and lines are dry and floor and walls are dry with no cracks. I look in one of the lines coming into the sump hole and about 5 feet out I see its packed with sandy soil. I run an auger through it and get out 2 feet of soil but I'm getting large chunks of concrete out also and now can't go anymore. The smell is still there even when I seal the sump hole with plastic and duct tape. It doesn't stink anywhere else in the basement except when you open the door under the steps. I don't remember the sand being in the pipe when I bought it as I looked before purchasing. Any ideas?