49 C.F.R. § 7.42
(a) DOT calculates the hourly rates for manual searching, computer operator/programmer time, and time spent reviewing records, when performed by employees, based on the grades and rates in the General Schedule Locality Pay Table for the Locality of Washington-Baltimore-Northern Virginia, DC-MD-VA-WV-PA, or equivalent grades, plus 16% to cover fringe benefits, as follows:
(d) DOT determines the standard fee for duplication of records as follows:
(g) For purposes of fees only, there are four categories of FOIA requests: