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(KSL News) -- Investigators are planning more tests on contaminated soil at Hill Air Force Base. They are still convinced there is no health risk.
Soil samples last month detected PCB's in some housing areas, two of which will require some cleanup.
PCB's are chemicals that, if exposed to for a long time at high concentrations, can cause health problems, including cancer.
Base officials still don't know the extent of the contamination or how the chemical got there.
