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IMCO General Construction
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Diamond "B" Constructors, Inc.
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Walsh Construction Co./WA
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Nova Group, Inc.
February 5, 2013
PITTSBURGH (AP) — The oil and gas industry is trying to ease environmental concerns by developing nontoxic fluids for the drilling process known as fracking, but it's not clear whether the new product will be widely embraced by drilling companies.
Houston-based energy giant Halliburton Inc. has developed a product called CleanStim, which uses only food-industry ingredients. Other companies have developed nontoxic fluids as well.
. . .