How to mitigate vapor migration thru an existing (1920s) slab on potentially contaminated soil ?
A client is considering purchasing an existing storefront building built in the 1920s.
A gas station with underground storage tanks existed 50 feet away from 1940-1985.
A Phase-I report has declared the tanks as potential hazards, with potentially contaminated soils and groundwater migrating to nearby properties, including ours.
To avoid the $10k Phase-II, is there a way to protect against the potential of harmful vapors from petroleum contaminants below the existing slab that likely has no vapor barrier by doing some kind of treatment above the slab?
Would any sealers mitigate the potential issue?
It’s a great building and location but should we walk simply because of the possibility of contaminated soil and groundwater on-site?
…Nobody wants to spend the $$$ for soil remediation, which would be impossible anyway since we’re not demolishing the building.
I look forward to your input.
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