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.
Air-entrained concrete of moderate slump (up to 5. inches [125 mm]) and adequate quality should be. used. In general, concrete strength of 3500 psi [24. MPa] for freezing and thawing exposure and 4000. psi [28 MPa] when deicers are used should be. adequate to prevent scaling.