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RADON CONCENTRATIONS MEASURED BY OTHER INVESTIGATORS
IN COMPARATIVE LOCATIONS
Avg.
10-15 ¢/1
New York City - Outdoors - 1943
"1952
"
"
Investigator
oT
Hess (4)
53.8
Hess (6)
103
1953:
Sweden - Outdoors
"
-
Equiv. Content
Description
"
Rn
Meyers & Hess (5)
100
Buildings
Hultqvist (7)
1680
Hultqvist. (7)
Portions of the data have been analyzed for variance.
For the street
samples, the variability between locations was + 29.2 x 10-15 c/l, and
within replicates it was + 56.7 x 10-15 c/l. Incontrast, the variability
between buildings was + 148 x 10-15 c/1, and within replicates it was +
68.3 x 10-15 ¢/1.
Work is now being done to determine how much of the
variability may be attributed to analytical error.
Triplicate flask sam-
ples are being collected simultaneously through a manifold in order to
insure that each flask receives an identical sample. For the first three
sets of triplicates collected by this procedure, the variation within
‘triplicates was + 22.6 x 10-15 c/l, and the variation between sets was
+ 46.5 x 10-15 c/l. These data viewed in relation to the earlier analysis
of variance strongly suggest that wide concentration fluctuations may occur
in any one location over a short period of time.
FUTURE WORK
At present the study is confined to New York to facilitate sample collection and analysis while the program is being developed. Eventually, the
We hope to obtain reasonable
study will be expanded geographically.
.
coverage of the United States.
We are particularly interested in the variability of radon concentration
as it may be influenced by different phenomena.
which we will attempt to observe are:
The kinds of variation
1.
Absolute sampling and analytical reproduceability.
2.
Instantaneous variability at a given location.
3.
Temporal variations -- diurnal and seasonal with emphasis on correla-
4.
Locational differences -- intra-city and geographical, correlating
with geology.
cH
A)
dwt
tion with meteorology.