Table 1. SITE. Area 11 Soil Activity Strata (Isopleths) ISOPLETH <“*lam cpm RANGE (FIDLER) A 1 <5, 000 B 2 3 4 5,000-25,000 25, 000-100,000 100, 000-500, 000 C and D 2 3 4 5 5, 000-25 ,000 25, 000-100 , 000 100, 000-500, 000 >500, 000 CD OVERLAP 6 ABCD OVERLAP 1 5, 000-10, 000 <5, 000 ANALYTICAL PROGRAM All vegetation samples were ashed and dissolved at LFE. Upon receipt at MCL, each solution was quantitatively transferred to a 500 ml volumetric flask and diluted to volume. Analyses for 238pu, 239°240p, | 24lam, and *3°U were per- formed from aliquots of these diluted vegetation solutions. As the initial step, a 100 ml aliquot of each vegetation solution was provided to Ge(Li) for measurement of its “41am content. For those solutions exhibiting less than 239°240py/24lam dpm ratio of 10. This assumption was subsequently confirmed 100 dpm of 24*!Aam (Ge(Li) limit), alpha-PHA of traced americium samples was required. Estimates of the plutonium levels were made by assuming a by mass spectrometric measurement of the 2739’2"°py levels in four randomly selected vegetation solutions. Quantification of the *38pu and 239’ 240py in all vegetations was achieved by alpha-PHA of 242Pu traced plutonium samples. All uranium analyses were accomplished via mass spectrometric measurement of 233y spiked samples. Specific activities were calculated on a dpm/gram of ash basis using the appropriate LFE ash weights and volumetric dilution factor corrections. During the development of the MCL analytical program, the original NAEG uranium analyses requirements were modified and expanded. Initially, the uranium analyses were to be constrained to 52 vegetation samples; 39 for measurement of atoms ratios and 13 for quantification of 235y, However, since mass spectrometric analyses satisfied these two analytical requirements concurrently, atom ratios and *35u content were reported for each vegetation sample. In addition to this modification, the uranium analyses requirements were expanded to 80