 Contaminants applicable to the use of an SPMD include, but are not limited to, polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), organochlorine pesticides, dioxins, and furans.The SPMD consist of a thin-walled, nonporous, polyethylene membrane tube that is filled with high molecular weight lipid.These tubes are approximately 90 cm long and wrap around the inside of a stainless steel deployment canister.