hi there,
as tim has said it is hard work, our core business is that of build cleans, recleans and sparkle cleans, we have fully kitted out vehicles, trained operatives with regards to H&S, COSHH, PPE.
i would be surprised if you would find anything in the short term, most of the developers these days work form tender lists, the QS's obtain the tender prices and then sites run from the list for the site.
and before anything happens, they are looking at all your literature to make sure that iy is all in place including method statements, risk assessments, and coshh assessments.
so just be prepared.
regards
martin