U.S. EPA has issued a "voluntary" information request from several service companies asking for data on the chemical composition of their frac fluids. From EPA's press release: "EPA has requested the information be provided on a voluntary basis within 30 days, and has asked the companies to respond within seven days to inform the agency whether they will provide all of the information sought. The data being sought by the agency is similar to information that has already been provided separately to Congress by the industry. Therefore, EPA expects the companies to cooperate with these voluntary requests. If not, EPA is prepared to use its authorities to require the information needed to carry out its study." What authorities?
For more, including a copy of the letter sent by EPA, see here.