http://www.iicrc.org/registrants/industry-perspective/ clean water losses category 3 water is likely to be Category 1 or 2 extract any excess water http://www.iicrc.org/registrants/industry-perspective/ extract any excess water categories of water damage IICRC S500 Guidelines number of factors hours water damage mitigation water damage microbial growth clean water losses http://www.iicrc.org/registrants/industry-perspective/