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.
You need a moisture meter not a clock. When the wood gets within 2% to 4% of the sub floor then it is ready to be installed. I like nearer to 2%. Each location has its own environment and the wood must acclimate to that environment.