a,
.
J
Shee dda oy neata aeloe ae
the stratosphere were produced by three separate events as follows:
jo
Latitude Region
Nuclear Test
9ON ~ 40N
Chinese test of September 29, 1969
40N - LON
Chinese test of December 28,
.
French thermonuclear tests in mid~
1968
ar
LON =~ >515S
1968
The samples in Tables 3b and 3c are grouped according to the
altitude of collection beginning with 19.2 km.
Within each altitude
group, the samples are then listed with decreasing latitude.
The
fractions of each individual filter making up the composite are liste
immediately below the composite sample number.
The collection para-
meters of the composite sample and the contractor laboratory performing the analyses are given prior to the nuclide concentrations.
QUALITY CONTROL
To evaluate the contractor's performance in radiochemical analyses,
HASL routinely submits blind duplicates, blanks and standards.
The duplicates are identical composites submitted with different code
numbers.
The blanks are unexposed filters supplied by the Air Force.
Standards are blank filters onto which calibrated solutions of various
nuclides have been evaporated.
II -
14