Radiation Safety and Cleanup Preparations the brush with bulldozers. This only mashed down the vegetation disturbed the soil beneath the tracks to depths of over 6 inches straight line and over 2 feet on turns. Next, a 100-meter-long, 2dragged throug! diameter chain was fastened to two bulldozers and requiring those : vegetation dense more the over rea. The chain slid vo be reworked, which caused even moresoil disturbance. The veget matted in place, requiring greater attenuation adjustments in the in readings.°? . . This problem was finally solved by using the bulldozer with the t above the surface level, and by piling the vegetation in windrows ou the survey area. There, after several weeks of drying, it was doused diesel fuel and burned.°4 The volume of brush to be removed was directly dependent on the spacing of the in situ survey. A 25-meter grid required completecleari the area to be surveyed. A 50-meter grid required only that lane cleared along the grid lines. It was determined that the slight disturbance caused by bulldozing was acceptable, since the current su was not the original surface of fallout deposition. Acts of man and n: over the past 20 years had altered the original fallout surface. The su that really mattered would be the surface left after radiological cleanuy complete. 55 A CHANGEIN PRIORITIES: AUGUST 1977 By the end of August 1977, brush clearing and debris survey techn: had been thoroughly tested, a grid survey system which used Site Osx the benchmark for master triangulation coordinates for the atoll had established, Enjebi soil samples had been taken, and in situ st procedures had been developed and were being validated in the ERSP Lab. The radiological survey of Enjebi was well underway when BG Tate COL Treat made their first visit to Enewetak. The purposeoftheir was to see the atoll firsthand and discuss cleanup plans with the Commander, who had been with the projecta little over 3 months, an ERSP Project Manager. Radiological tasks and priorities were discu including work priorities for the FRST, priorities for ERDA’s in survey and refinement of the scope of work on selected northernisl. iterative radiological cleanup techniques to be employed whenclean particular areas were initiated, and characterization of a progran determining the overall scope of work that needed to be accomplishe Runit in accordance with the requirements of the EIS.56