Fuel Oil Vapor Intrusion Mitigation
I just wanted to let you know how well the Radon fan and accessories are performing. Everything is installed and works as advertised. I had a bit of an odd situation to begin with and thought that you might be interested in hearing about it.
At some point during the 1960's, the homes on my block were all equipped with oil burning furnaces. They were all originally built that way in the mid 50's. All had above ground tanks that gravity fed first floor furnaces. In fact the cut off copper supply lines entering the house are still in place on each house. My best guess is that the house to my immediate north had some sort of spill, or at least a leak that that went ignored for some time. The oil contaminated the ground in the surrounding area. Over the years that oil made it's way, underground, a few feet over to my property. Due to the drought we have had recently, the ground has contracted and has slightly pulled away from my house's foundation sidewall in some places. This has allowed air to travel from ground level, past the contaminated soil to the foundation footing. This air smells of heating oil and that odor made its way into my drain tile and subsequently into my sump crock. The smell started off very slight, but over the course of a couple of weeks became quite strong. So much so, that it was noticeable in other parts of the house. I even had a field representative from the the IL State Fire Marshall's office come out to investigate a possible underground storage tank. Your Radon fan has effectively created a negative under-slab pressure, evacuating that smell through the vent piping, killing two birds with one stone.
I don't think I could be any happier with the outcome.
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