4.5 LOGISTICS AND MAINTENANCE 4.5.1 Liguid Nitrogen Liquid Nitrogen (LN) was required for the operation of the intrinsic germanium gamma detectorsin the RADLAB. Initially, LN was flown to Enewetak. Later, an LN plant was installed next to the RADLAB complex. (See 3.4.3.) No recorded down-time of the RADLAB operations was due to a shortage of LN. 4.5.2 Bottled Methane Gas Methane gas was used as a counting medium in three RADLAB gas proportional detector systems, A two-bottle manifold was installed on the counting trailer to allow cylinder change-out without disruption of gas flow. An initial supply of methane gas was shipped to the island at the start of the project and was followed by resupply from H&N in San Francisco on normally scheduled sealifts. Empty methane gas cylinders were returned to Airco Industries in California for refill and return. On two occasions, it was necessary to transport methane gas by MAC to avoid shutting down the counting systeins. Considerable effort was required to retard corrosion and maintain threads on stored cylinders so the caps could be removed. 4.5.3 Replacement Supplies All supplies and materials furnished for the project were purchased and shipped through the Eberline Albuquerque, New Mexico facility by personnel directly responsible to the Enewetak project. In April 1977, materials, supplies and equipment were brought into Albuquerque, inventoried, and reshipped via Holmes & Narver (H&N) in San Francisco, for export to Enewetak by available sealift or MAC flights. All expendable hazardous acids, and laboratory materials were ordered in quantities that would allow completion of the full project without resupply, to avoid reshipment of items that could only go by slow surface transportation. A military storekeeper was assigned to inventory, issue and order supplies at the RADLAB on Enewetak. On-island storage of materials utilized a bunker adjacent to the RADLAB complex (see Figure 4-1), and a warehouse located on the south end of the island. Both areas were without lights and were subject to many leaks during rainstorms. The bunker was used to store organic materials and the warehouse was used to store separately the oxidizer materials (to minimize the fire hazard). Most reorders of supplies and materials to be expedited were shipped directly to Honolulu by commercial air freight and then on to Enewetak by MAC. Normal orders were shipped by truck to H&N in San Francisco, and then to the island by MAC. A total of 183 resupply shipments of minor nonhazardous items was made afterthe initial deployment. 4.5.4 Disposal of Radioactive Wastes Radioactive wastes generated in the RADLAB operations were disposed of by packing and delivering to the FRST for movement to the Cactus crater on Yvonne. The requirements set by the FRST were used in the preparation and transfer. Solid Waste. The RADLAB produced solid wastes totalling approximately 4000 cubie feet. This volume consisted of 36 55-gallon drums of soil, 59 wooden crates, and 12 filter boxes from the following sources: 1. Soil from field samples that remained after the analysis and archiving aliquots were removed. 2. Metal cans used to collect the samples in the field which were damaged in transit to the 3. Laboratory drying pans and glassware. 4. Paper and rubber goods contaminated during the laboratory process. De One damaged 137Cs 10 mCi calibration source. RADLAB. 135