jammma Soectroscoov Once dried, soil samples were alaced in a alasctic petri dish and counted on either a Nal(Tl) or Ge(Li) decector. Vegetation, water arf animal samples were placed in an aluminum tuna can and counced. onds for most samples. can geometry, Councing cime was 4000 sec- Boch systems were originally calibrated for the suna Corraction factors were developed to normalize all petri dish resulcs to che standard tuna can counting geometry. All counting standards are traceaole to N3S sources. Samples counced prior to the middle of 1976 were counted on the NaI (Tl) detector, Samples counted after these dares were counted on the Ge(Li) system. This accouncs for the capability co identify the presence of radionuclides such as Ame241,°Sb-125, 3aLa-140 and Ce-144 in samoles where previously only Co-60, C3-137 and K-40 were sositively identified. Oualisvy Conerol BNL operates its own QC program consisting of blind duplicarces. 3NL also particioates in interlaboratory comparisons with HASL, the University of Washingcon and the LAEA. Results from our program are Listed in Table 17. The firse pare of thfS table illustrates all the daca from che 3NL 5liad duplicate srudies, other. These data appear to be in reasonable agreement with each The second section presents dara from a split sample project with she Health and Safety Laboratory (HASL) in New York. These results compare less favorably, bute ere also in most cases, in reasonadle agreement. Discussion of Resules Reported results of the analyses performed on the Marshall Island samples are aresented in Tables 2 through 9 with associated 2-sigma error. been divided into two sections: resulesof gamma spectral anaivses and 90, plus transuranic elements by radiochemistr~. daza on gamma emizting The cables have vadionuclides Tables 2 TArough 5 present ‘found in vegetation, soi, water