CUMBERLAND, Md. (AP) — A group of doctors is demanding full public disclosure of chemicals that would be used to drill for natural gas by hydraulic fracturing in western Maryland.

The Cumberland Times-News (http://bit.ly/Un0SQ7 ) reported Monday that the Chesapeake Physicians for Social Responsibility say rules proposed by state regulators would impede research and public discussion about possibly hazardous chemical formulas.

The rules would require public disclosure of all chemicals to be used at a site. But if a company contends a particular compound is a trade secret, it could provide an alternate list identifying the compound’s chemical constituents but not their concentrations or their connections to specific commercial products.

The person claiming the trade secret would have to disclose the omitted information upon written request to any health professional or public health researcher.

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