and so this machine can tell us lead, cadmium, zinc, manganese concentrations all at the same time. narrator: while this research is ongoing results from samples collected during one trip show the complicated nature of this study. 5% of tar creek's overall flow rate was coming from the chat piles and 40% from the mines. 90% of the cadmium originated from the chat piles and 4% from the mines. for zinc, the split was about 30% from the chat piles and 50% from the mines. and for lead it is split almost equally. these trends vary throughout the year, and ongoing research will explore the importance of mine seepage and chat-pile runoff as sources of metal loading over extended periods. preliminary findings from these studies are giving us a bettnderstanding of the very complicated he and environmental problems associated with mining. while these findings will help this community better address health issues the value of the results is not limited to picher, oklahoma. hu: mini ng is a process that occurs all over the world. one of my great hopes is that the developing world will be able t