I am currently looking into the installation of utility lines (specifically sanitary sewer and water) through a contaminated site. The proposed pipes would travel through an asbestos pile with a 2' soil cap. I did some research to try and find the proper backfill for utility trenches in contaminated areas but came up empty. The research I did find tends to lean on flowable fill to reduce the posibility of contaminated material migrating along the trenches. Any help is appreciated.
I need to prepare a construction detail for the work as well. If anyone has a link to one that would be great too.
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