ples will be obtained by digging a trench immediately adjacent to the area to be sampled and removing soil from the trench wall by pushing into it a square pan with cutting edges on one open side. The pan will have a top-to-bottom distance of 5 cm and total mass collected will be the same as with surface samples. 2. Sample locations will be described; e.g., location is open savannah, brush-covered, or forrested, and level, mounded or depressed, as such information might provide additional clues for defining the bounds of cleanup areas. D. SAMPLE PREPARATION. Samples will be prepared.for gamma spectroscopy by breaking up aggregates and pulling apart topsoil plugs root mat) as necessary. (consisting of vegetation and Any vegetation will be cut up so that it can eventually be distributed homogeneously. ciently to allow successful mixing. Samples will be dried suffi- Except for large rocks, which will be separated and discarded without taking any special efforts to remove surface deposits, the entire sample will be blended to give a more-orless homogeneous matrix. A weighed quantity of the mixed sample will be packed into a standard-size container for analysis. E. PU ANALYSIS.