Very high levels of AST (more than 10 times normal) are usually due to acute hepatitis, sometimes due to a viral infection. With acute hepatitis, AST levels usually stay high for about 1-2 months but can take as long as 3-6 months to return to normal.
MFMA recommends the relative humidity level for a concrete slab for a non-glue-down maple floor system be 85% or lower and for glue down systems the concrete slab relative humidity level should be 75% or lower before installation.
The flooring installer will put down tile only if the floor moisture content is below 3 %, but after 3 months of drying, he says the concrete moisture content is 12 %. First, have the installer or the testing firm check the calibration for the testing device used to measure moisture content.