u/Minimum-Paint-964

It’s the summer and town feels quiet, but any advice on making friends as a new family with a baby?

To shorten a long story, our kitchen sink line is separate from the rest of the house and had backed up into the crawl space. We didn’t know for three to four weeks at most (last time we went down there). The grey water drained into our perimeter drain and was mostly getting taken out by the sump pump. We noticed a smell and went down to see if it was the pump to find a little standing water and black grey water sludge on that corner of the house. Removed all the sludge except for what was in the gravel of the perimeter drain. Can we treat it and flush it or do we need a full replacement?