Wyo. allows formulation of 146 fracking chemicals to be kept secret

The Wyoming Oil and Gas Conservation Commission will allow 11 natural gas drilling firms to not disclose the identities of 146 chemicals used for hydraulic fracturing since rules on fracking-chemicals disclosure became effective one year ago, said Tom Doll, the commission's supervisor. About 37% of such chemicals are tracers for fracking fluids, while 50% are included in mixes that are used to fracture shale formations, Doll added.

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Star-Tribune (Casper, Wyo.) (tiered subscription model)

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