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.
What should the humidity level be in my closed crawlspace? We commonly see crawlspace dehumidifiers set lower than necessary, and sometimes so low that they cause problems with hardwood floors. We set our dehumidifiers to control the relative humidity in our closed and sealed crawlspaces at 68% - 70%.