I am at wits end, and need any advice that can be offered. We recently purchased a pier and beam home, and found main 4" drain line was fallen on ground (who knows how long it had been on ground). I have repaired problem, but I believe prior drainage on ground has caused a musky odor that smells a lot like skunk spray. I have tried bleach and lime to no avail. Please let me know how to get rid of odor.

I have always heard that lime took care of that problem though I have not tried it. Possibly you could use only the lime without the bleach and give it time to work.