PREPARATION FOR PROCESSING Knead condensed water vapor into specimen. Weigh and record gross wet weight. Wipe bag and discard towel. Open specimen bag into pseudo-glove box. — cut vegetation into 1/4 inch lengths. — remove stones and wire brush rock. — remove large plant root fragments and wire brush. Transfer 2 kg of soil into each tared, labeled, can. Weigh cans and record gross wet weight. Ory cans 24 hours in oven at 105°C. Weigh cans of dry sot! and record dry weights. Collect bag, labels, tape, stone, and roots. Tare weigh shipping bag and discarded elements. PROCESSING SOIL @ Ball mill cans 3 hours at 130-140 rpm. Prepare hood and assemble hand tools. Transfer ground sot! to 32 mash sieves. Remove <500 y fraction by sieving and hold. Ball mill >500 y fraction 60 minutes. Remove <500 y fraction and add to holding cans. Ball mill >500 u fraction 60 minutes then resieve. Store 2500 y fraction. Bal) mill composite <500 wu fraction a few minutes to homogenize. RADIOCHEMICAL SPECIMENS Weigh out 500 al of homogenized soil, twice. Use combined weights of specimens designated by ORI and prepare 200-gran composites, two. CLEAN UP Clean all wire sieves with wire brushes and compressed air. Wash all sieves and hand tools in sonic cleaner. Rinse sonic-cleaned equipment in clear water and drata. Ory all washed equipment at 105°C. Discard heod liners and vacuum out the hoods. Wize hoods ‘and other surfaces down with cloth, including vibrating spatula Aaasies. 150