The State of Michigan Department of Environmental Quality has deter-mined that toxaphene concentrations in soil that exceed 60 pg/kg can pose a threat to underlying groundwater.
(a) If a 100-g sample of soil contains 10-5 g of toxaphene, what are the toxaphene soil and Michigan action level concentrations reported in units of ppb?
(b) Does this sample pose a threat to groundwater in Michigan?