Bob
You have to be very careful cleaning up blood for your own health and especially if you have employees cleaning up blood, which is considered a "bio-hazard" and is regulated very strictly by the OSHA.
Of course they are not going to come in and check you out, but if per chance an employee got sick, possibly HIV from the blood you could be liable for fines and law suits, etc.
I know you did not ask for a primer on bio-hazard cleaning, but since you brought up the subject I thought I would offer some information gained from years in the business.
Blood is a protein stain, that is, organic material and can be cleaned with a protein stain remover. We have such a product for protein stains and I am sure a great many others have one too.
Key when cleaning blood, brain matter, feces, urine, vomit, etc be sure to wear at least a painter's mask, if not a respirator, rubber gloves; safety glasses and I think they require water proof clothing or an apron.
Just some well intentioned thoughts.
Bud Abraham