TOC cleaning validation

hi, i want to ask the method of cleaning validation of water insoluble molecules on TOC

For use of TOC, the target residue must have adequate aqueous solubility for the intended purpose.

But TOC has solid sample module also to use water insoluble samples there. My problem is recovery parameter…how to get the total carbon from swab samples if it is dissolved in ethanol. please help me if someone work on that.Thanks

what kind of level you are talking about?