After a building has gone through decontamination activities from a chemical attack there will be a significant amount of building decontamination residue that will need to undergo disposal. This project consists of a fundamental study to investigate the desorption of simulated chemical warfare agents chloroethyl ethyl sulfide (CEES) and dimethyl methyl phosphonate (DMMP) from building materials. The physical and chemical surface properties of the building materials have been obtained , as well as the adsorption and desorption characteristics so that modeling can be performed to assess various combinations of building materials and contaminants in different incinerator or thermal treatment system designs and operations. The results of these studies can be used to evaluate incineration technologies for appropriateness for disposal of contaminated building cleanup waste materials. In addition, the results from these studies will be used to develop computer simulations to predict the behavior of contaminated residue as it is processed through incinerators.