NAEG AREA 11 SITES A, B, C, AND D, REPORT OF VEGETATION RESULTS Capt. Mark E. Mount, USAF McClellan Central Laboratory McClellan Air Force Base Sacramento, California ABSTRACT This memorandum documents the final McClellan Central Laboratory (MCL) results from plutonium, americium, and uranium analyses of Nevada Applied Ecology Group (NAEG) Area 1l vegetation samples. Specific activities of 738pPu, 2399240 Pu, 24 1am, and *35U are reported for each sample. GENERAL A total of 86 Nevada Test Site (NTS) Area 11 vegetation samples were provided to MCL for analyses of their plutonium, americium, and uranium content. Included among these samples were overlap collections between Sites B and C, and A, B, C, and D, as well as collections from each individual site. Each sample was additionally identified by its type (genus and species) and the soil activity stratum (isopleth) from which it was collected. Vegetation types represented among the 86 samples included Atriplex confertifolta, Atrtplex canescens, Tetradymia glabrata, Chrysothammus visetdtflorus, Lyctum andersonti, Hymenoclea salsola, Grayta spinescens, Grayita spinosa, Furotia lanata, Ambrosta dumosa, and Coleogyne ramosissima. Soil activity strata (isopleths) were numbered from 1 to 6, with each representing a specific net FIDLER 24 lam cpm range. Table 1 summarizes the soil isopleths and FIDLER count rates associated with each sampling site or overlap. In the case of Site A, additional isopleths were established from Ge(Li) measurement of the *3°u activity (dpm) in collected soils. The 235y isopleths were numbered from 1 to 3 and represented activity ranges of 0-1, 1-25, and greater than 25 dpm, respectively. 79