Not sure what the code is, but that seems like 3/16" in 10 feet seems
like an impossibly high standard. Thats 3/32 in 5 feet. Lots of your
cheaper levels (and more expensive levels that have been around the
block) can be off by that much. Is this subfloor plywood on joists?
considering the straightness of the lumber, etc, it's tough to get
things perfect. How did you figure out that it was 3/4 in 10 feet?
Depends too on where it is: If its under kitchen cabinets it is a more