50
Sample
3h.
CL 828—-P & 830—P:
dpm/egal
Rain, 1.8) Zale, 0.9);"" equiva-
21,0 + 1,0
lent, collected 1010, October 31, 1955 to 1030,
November 17, 1955.
356 CL 831-P: Snow, 0.535 gals, 0.27" equivalent, col-
22,3 + 1.0
lected 1030, November 17, 1955 to 0949, November 21,
19556
366 CL 837=P: Rain, 0.147 gal., 0.075" equivalent, col~ 36.0 +h.7
lected 0919, November 21, 1955 to 0920, November 23,
1955.
376
CL 8)0~P: Snow, 0,122 gal., 0.062" equivalent,
collected 0920, November 23, 1955 to 1055, Novem=
11.7 + 2.7
38. CL 871-P: Snow, 0.116 gal., 0.059" equivalent,
collected 1055, November 28, 1955 to 1100, December 2, 1955.
390
CL 872={P:
Snow, 0.31 gal., 0.16" equivalent, col-
lected 1100, December 2, 1955 to 1120, December 5,
19556
0. CL 95k-P: Snowy O15 galey 0,077" equivalent,
collected 1120, December 5, 1955 to 0800, December
21, 1955.
yl.
CL 976=P:
Snow, 0,082 gal., 0.02" equivalent,
collected 0800, December 21, 1955 to 1115,
January 16, 1956,
28.6 + 3.4
19.0 + 1.4
53+7
4hO + 25
* See discussion, "Test of Rain Collection
Method," page 13 of this report.
B.
Insoluble Residue from Chicago Rains
l.
Insoluble residue from rain, CL 320: 1.82 gal.,
0.930" equivalent, collected December 2h, 155)
to December 27, 195k. The filtered insoluble
residue was fused with sodium carbonate before assayo
- Total Sr% activity insoluble residue: £0.6 dpm
Total Sr90 activity in solution:
20
Insoluble residue from rain, CL O07 & 08:
9.2 + 0.5 dpm
0.71 gal.,
0.36" equivalent, collected February 18, 1955 to 0900,
February 21, 1955, The filtered insoluble residue was
fused with sodium carbonate before assay.
Total Sr90 activity insoluble residue: 0.7 + 0.1 dpm
Total Sr90 activity in solution: 29.9 + 1.5dpm