http://www.vox.com/energy-and-enviro...kout-epa-panic
EPA does not use science to guide regulatory policy as much as it uses regulatory policy to steer the science. This is an old problem at EPA. In 1992, a blue-ribbon panel of EPA science advisers that [sic] 'science should not be adjusted to fit policy.' But rather than heed this advice, EPA has greatly increased its science manipulation
Then there is this part. Looks to me more like a cover up of twisting science.
In theory, the EPA should have new safeguards to protect its scientists from undue Bush-style political interference. The agency's "scientific integrity policy," enacted in 2012, notes that it is "essential that political or other officials not suppress or alter scientific findings."