Testing Land for Radon

Hi question here for the Radon pros. I’m asked by a builder if it’s possible to test the land before construction for radon.

I know construction itself can create new path for the radon and it’s hard to tell how much stack effect the building will create but have you ever setup a tent or shack on land with a small suction and continuous radon monitor and see what result you get?

Thanks

I did a Google search and all said no way …
http://www.mcgarryandmadsen.com/inspection/Blog/Entries/2017/8/6_Can_I_test_vacant_land_for_radon_before_building_a_house.html

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