From Table Danish Category reuse standards for lead and

Though fly ash contains elevated concentrations of the aforementioned trace elements with respect to bottom ash and conventional MSW (due to the volatilization of these elements during the combustion process and the subsequent deposition onto the much smaller mass of APCR, resulting in an enrichment of the heavy metal concentration), and is likely to warrant management as a hazardous waste in the United States, the commingling of MSWI fly and bottom ash produces a waste that BMS 232632 can be managed as non-hazardous. Combining bottom and fly ash is not a common practice in other developed countries where combustion is the main avenue for MSW management, in fact reflex is banned in some countries, as will be discussed below. The in-process mixing technique of fly and bottom ashes is a result of federal (U.S.) hazardous waste policy, and while the commingled ash does not warrant management as a hazardous waste, it limits opportunities for the potential for reuse of this material when compared to segregated bottom ash.