TABLE B-2-1. TRU/AM RATIOS AT IDENTIFIED SITES ON PEARL Location Cluster "A" Composite Composite 11-5-5 8-S-4 9-S-2 5-N-1(1609) 5-N-1(150°) 6-S-1 8-BL-0 3 3 3 2 2 2 2 4.45 4.23 2.87 6.59 5.57 7.27 4.28 6.32 3.87 2.87 6.39 5.29 7.61 8.37 5-8-3(270°) 5.9-8-3 4.5-8-2.5 4.5-S-3.5 De58-2. 5 1-S-1(280°) 1-S-1(300°) 3-8-1 1-N-1 2 2 2 2 2 1 1 1 1 7.87 7.96 9.03 9.61 14.04 9.03 10.23 10.18 10.26 8.66 8.96 9.68 —7.93 9.06 7.17 8.28 Mean Ratio Standard Deviation 9.10 7.80 4.10 1.13 "2.18 1.28 5-S-3(280°) 2 6.54 Cluster 1 2 3 6.35 ADDENDUM TO TECH NOTE 2.0: DETERMINATION OF THE RATIO OF TOTAL TRANSURANICS TO AMERICIUM IN SOIL ON ISLAND PEARL AFTER DEBRIS REMOVAL DOE/ERSP TECH NOTE NO. 2.0-C DATED: 20 August 1978 AUTHOR: J. Giacomini, DRI Pearl was first measured by the in situ van and soil was sampled in October-November 1977. Average concentrations of total transuranies (TRU) were computed based on these data. Debris removal has since taken place, which caused much soil disturbance. To determine the effect of the debris removal, the island was remeasured by the IMP and new soil samples were collected. Figure B-2-3 shows the area that was remeasured and the soil sample locations. The new soil samples indicated a different ratio from that reported in Tech Note 2.0-B. Determination of one ratio for the disturbed area was made using laboratory results from soil samples taken at four locations with two composites at each location. (Reference Tech Note 2.2-A for assumptions made in computing the mean ratio and associated error.) The range of values is from 5.42 to 8.64. The ratios are: Location 3-S-2 3-N-1 ~1-BL-0 5-S-1 A 7.58 7.75 8.64 5.57 B-2-6 Oem B 6.84 5.46 7.42 5.42