Definitions - Continued

DOE-STD-3014-96

Threshold Quantity (TQ): The quantity of a hazardous chemical below which exposure

screening or evaluation is not necessary.

VFR Flight: As defined by the FAA, flight conducted in accordance with Visual Flight Rules.

VOR: As defined by the FAA, very high frequency omnidirection radio range. Used as a basis

for navigation in the national airspace system.

VORTAC: As defined by the FAA, a navigation aid providing azimuth and distance measuring

equipment at one site. A combination of VOR and TACAN navigational aids.

Victor Route: Same as low altitude route.