"191 mg/kg Aluminum
3,2 mg/kg Barium"

You might be right, but the relating size is kilogram and not liter in the video. Therefore, I guessed that the test was a dust test.

If they would place the copy of that test result on the internet it would be easier to determine if it is a rainwater test or a dust test.

Until then for me it is a dust test because I don't think that they would have taken that much hair from the kids.

Also, blood is measured in liters (or gallons as you like).