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6.

All Sr8? and sr?9 R values have been normalized to the LASL

values by means of the KOA samples analyzed at both LASL and NRDL.
7.

All x?! R values have been normalized to the NRDL values by

means of the KOA samples analyzed at both LASL and NRDL.
8.

The term "probe velocity" refers to the pumping speed in the gas_o

particle coincident sampler.

Samples collected at a low probe velocity :

may be suspected of being biased with respect to particle size.
9.

On KOA the Massive samples were collected on the 60,000 foot

height line; the Wilson Special sample was from the general fallout.
10,

The fine fractions for the KOA and OAK size-separated samples

were expected to contain a large proportion of particles having fall rates
less than 1 cm,/sec.

Nominal falling rates for the WALNUT fractions were:

fine fraction, less than 0.1 cm./sec.; medium fraction, 0.1 - 1.0 cm./sec.;

coarse fraction, greater than 1 cm. /sec.
11, The sampling altitudes given for Aircraft 978 on WALNUT and 981
on OAK are thought to be too high, but more reliable figures are not available.

SAN BRUNO FRE
109

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