Pennsylvaniaís Department of Environmental Protection (DEP), under contract with the federal governmentís Food and Drug Administration (FDA), conducts inspections of each of the stateís more than 400 facilities which perform mammographic x-ray procedures. These inspections, performed by personnel in DEPís Bureau of Radiation Protection, are conducted on a schedule prescribed by the FDA. This schedule calls for a facility to be inspected once every twelve months, with a two-month grace period either way.