How should moisture content and substrate preparation be checked before commercial self-leveling underlayment?

In commercial renovation self-leveling projects, many reworks aren't due to poor materials, but rather improperly cleaned substrates. We had a small project where the floor looked level, but a few days after installation, it started peeling in spots. Upon removal, we discovered that old adhesive and moisture hadn't been properly addressed. I now use a moisture meter or calcium chloride test to…