91.   The chemical had been in oil sprayed on unpaved roads.

92.   The chemical may be leaching out of soil at construction sites and other places where soil erosion is common.

93.   The chemicals are byproducts of a number of industrial processes, like the chlorine bleaching of pulp done by Alaska Pulp in Sitka.

94.   The chemicals have already been severely restricted in the United States.

95.   The chemicals were in canisters called oxygen generators, which are used to supply emergency masks with oxygen.

96.   The chemical is acrylamide, which is produced when certain carbohydrates are baked or fried at high temperatures.

97.   The chemical is a widely used base chemical for plastic.

98.   The chemical is the only known lung carcinogen found solely in tobacco smoke.

99.   The chemical no longer is active, but it produces silt that enters Cortez and settles to the bottom.