60 RADIOLOGICAL CLEANUP OF ENEWETAK ATOLL 1968, resulted in a high-order detonation which scattered propellant ove, the western tip of Enjebi.?! The location of the HEUSoperation is shown in Figure 1-58. The engine started operating normally but, after a short time, j, exhibited uncontrolled burning which resulted in destruction of the OCEAN EASY GZ ee HARDTACK STATION 1312 X-RAY GZ < o COAX CABLE RUN 7 ow oy HEUS ROCKET LAUNCH PAO 1968 LAGOON FIGURE 1-58. PROJECT HEUS, ENJEBI. engine, spalling of the concrete blockhouse to which it was attached, and the spreading of beryllium metal and oxides over a wide area in a nonuniform manner. After wetting the area thoroughly, a decontamination crew scraped dirt from the surface inside a circle of 00 feet radius. The dirt was buried in the crater resulting from the explosion. In addition to soil contamination, some beryllium was plated on the surface of a concrete blockhouse. No attempt was madeat that time to determine the exact location or extent of contamination. An investigation was made in May 1969 and, although the area was indicated to besafe without protective clothing or breathing apparatus, the results also were . considered to be equivocal because of the random nature of the contamination pattern. A second firing conducted in January 1970 was successful and did not result in an explosion. The U.S. Air Force Environmental Health Laboratory took soil samples before, during, and after firing. The results were published in the Laboratory’s Report Number 71M-2.92 Sampling ey