- NN es a & pA as —ss SANEOD . ‘ Le . = hy Se SEES OS AN SSR ~ grt | =~ SB + ve. —— ~ =e . . , Further investigations are in f.c gress on the reasons for the deviations shown by the three static::: smtioned above. In addition, analysis of foreign soils will te made where available to extend the comparison. Other Comparison Programs ‘Other sampling procedures for fallout documentation are by collection in a high-walled pot, or by collection:of rainfall. These ' procedures may ‘also be used for calibration of the gunned film. The first is represented by data from New York City by HASL, and the second by data from Pittsburgh by Nuclear Science and Engineering Corporation under AEC contracts. The detailed data will be presented later, but Table 2 indicates the cumulative results useful for cali- bration purposes. For comparison, the New York City (La Guardia Airport) soil and gummed film data are included. | | The pot and rainfall samples show that the 1.6 correction factor is not sufficient for this period. It must be emphasized, however, that this is not necessarily a failure of the original pot to film calibration figure of 1.6.’ It is more likely a failure to attribute measured MFP activity correctly to earlier tests, with a corresponding error in Sr-90 estimation. &eo. Te. 2 . . a jy : os .