Victor Ketellapper is a site assessment manager for the Environmental Protection Agency. He says the contamination probably came from the former Anaconda Company/Atlantic Richfield refinery and smelter. But he assured about 40 residents who gathered at a community center Monday that the contamination was "low level" and doesn't pose an immediate threat to public health. Cascade County commissioners plan to meet with EPA officials Tuesday, and the EPA isn't planning an immediate cleanup.