Thu, Nov 26 2009
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Mining-waste cleanup begins near Carterville A monitoring well drilled 200 yards east of the pit showed no change at all, he said.
Doolan said metal becomes soluble and leaches in the presence of oxygen. When the waste piles are rained on, the metals in them oxidize and leach into surface water. “When you put it underground, it goes anaerobic because you take away the oxygen,” he said. “It makes the waste more insoluble than if it were sitting on the surface.” To be on the safe side, the EPA is installing six monitoring wells around the pits that are being filled at Carterville. When the second phase closer to Webb City starts next year, the EPA will drill 12 monitoring wells. “We are monitoring to make sure we are not having a groundwater problem,” Doolan said. “If we do have a problem, we will cease and desist, and do something else with the chat.” Dust control Another concern associated with the cleanup is dust. Doolan said dust-control measures will be a primary concern. “We feel that Snyder knows how to move dirt and keep the dust down,” he said. The contract is the first in a series to be awarded for cleanups that will cover about 7,000 acres over a 10-year period. The EPA estimates it will cost $57 million to reclaim and restore all the land. The state of Missouri recently agreed to pay for 10 percent of the cleanup, which is required under the federal Superfund law. The EPA also will attempt to recover costs from mining and chemical companies that have been identified as potentially responsible parties for the contamination. The second phase of the cleanup, planned for next year, will involve land closer to Webb City. The waste comes from a variety of lead mining, milling and smelting operations, some dating to the mid-1800s. The wastes have contaminated groundwater, surface water and surface soil with cadmium, lead and zinc. The area will be cleaned up to a standard that will allow mostly unrestricted development in the future. 
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