The electronics rack also contained an uninterruptible power supply (UPS) system which had two internal battery packs with charger, inverter system and static transfer switch. The UPS system was sized to supply alternating current (AC) power to the critical busses feeding the major counting instruments for as long as 45 minutes when the main power system was interrupted. This allowed time to start the emergency diesel generator to meet the counting trailer requirements. An autotransformer type regulator was installed to supply power for any noncritical buss requirements in the electronics rack. Each of the two PHA units had a 4096-channel memory which could be divided into subgroups for data acquisition of multiple alpha and gamma signals. One PHA unit was used as the alpha spectrometer and contained groups of 512 channels for each of the four alpha detectors. The other 2048 channels were kept as a spare until the FPDB project began and were then utilized for the third gamma detector output. The second PHA memory was grouped into two 2048-channel areas and sectioned to accommodate each IG detector. Signal multiplexers were installed into the system to tie all signals into one analyzer if required. The two PHA systems were identical so that not only could both alpha and gamma radiations be analyzed simultaneously on one PHA, but parts could be interchanged if one system broke down. The dual PHA system resulted in full operation and zero time loss during the entire project for alpha and gamma counting capabilities. 4.1.4 Instrument Maintenance Facility (IMF) The IMF was utilized to calibrate and repair laboratory and field instruments used in support of DOE and FRST operations and to store the tools, spare parts and equipment esential to perform such ealibration/repair operations. The IMF was vital to the radiological operations on Enewetak because of the isolated geographical location and adverse field conditions. It was staffed by an AF Precision Measurements Electronics Laboratory (PMEL) technician and contained office space for the EIC laboratory manager and Navy storekeeper. The majority of space in the work section was occupied by an extended bench with shelving to hold repair equipment which included a drill press, vise, grinder, drying oven, nickel-cadmium battery charger, and voltage regulator. The efficiency of the IMF enabled both the FRST and the RADLAB eomplex to funetion continuously without time loss due to electronic or mechanical equipment failures. Specific information on the inventory of the maintenance instruments is in Appendix C-3. 4.2 MAJOR PROGRAMS The RADLAB support of the Enewetak Cleanup Project was principally concerned with the collection, analysis and archiving of surface and subsurface soil samples for the transuranics program, fission product data base program, and suspected burial site investigations. During the project, EIC assigned laboratory control sample numbers to 22,534 samples, processed 8,400 TRU samples, processed 6,003 FPDB samples, and processed 11,455 soil samples for shipment to, and long term storage at, the Nevada Test Site for DOE. Table 4-1 shows the specific sample breakdownby type of analysis. 4.2.1 Transuranies (TRU) Program The purpose of the TRU Program was to determine the concentration of TRU in the soil and then to take measures to reduce the concentrations to acceptable levels. Surface soil samples were taken as directed by DRI and the ERSP Tech Advisor and analyzed in support of the in-situ IMP operations to provide 2414m concentrations and ratios of TRU to 241Am for on-island estimation of the transuranic contamination. Subsurface samples were taken at locations as directed by the ERSP Tech Advisor and DRI statistician to investigate locations that were suspected of exceeding the limit for subsurface soil. 115