VarTdbT1itypresent in this data, SIX Samples are MOt eruuyn CU UBVETOPa © stabilized mean. VI. CONCLUSIONS AND RECOMMENDATIONS There appears to be variability in 281 ny activity at any point of measurement (before mixing). Variability has been observed within a given soil sample, as well as within a given area. This means that if soil sample data are to be compared to the IMP data, (for a given measurement) a multitude of samples are required. Data in Fig. 6 illustrate this problem.