A component of the Department of Transportation has released parts of a spill plan for an oil pipeline that burst earlier this year, but withheld portions of the plan under Exemption 7(F). The request was made by Inside Climate News who wrote about the release here.
The way I see it is that the agency is using Exemption 7(F) basically because the Supreme Court abolished the use of Exemption 2 for this type of material in its Milner decision. Of course the problem here is that the exemption being used is a law enforcement exemption and the agency will have to establish that it meets the law enforcement threshhold before the actual elements of the exemption can be discussed. If the case goes to court, it will be interesting to read the government's justification for its withholding.