Lake Michigan environmental survey : final report / [edited] by John C. Ayers.

******* LAKE MICHIGAN RADIOLOGICAL SURVEY. ********......
Table A-22 (Cont'd.)
RADIOACTIVITY IN ZOOPLANCTON

SAMPLE SAViPLE
STATION NUMBER

WEIGHT COLLECTION
(GRAMS) DATE

ACTIVITY IN PCI/GRAM (% ERROR)2
CESIUM-137 ZINC-65 GROSS BETA3,4

E -2**
E - 2**EF-2'..
F F-2*4
EF-2*"'
E F -2::
E F-4**
EF-4..
F-5 **
F-54 '
F - 5 ^-'.;-:
KEW*..
KEW**'
K E W *;-'
P A L.,PAL**
P T e *,
7 I ON**
Z I ON:4
Z ICN**

70
96
364
75
80
353
68
356
69
91
348
74
89
340
38
97
347
72
87
351
358

0.2104
0.1355
0.1054
0.2865
0.1780
0.1896
0.1863
0.1650
0.0850
0.1590
0.2539
0.0448
0.3627
0.3104
0.3635
0.1892
1. (3808
0.0851
0.3364
0. 1256
0.2366

08-25-69
10-30-69
05-15-70
08-26-69
10-31-69
05-16-70
09-02-69
05-20-70
09-01-69
11-02-69
05-19-70
09-06-69
11-04-69
05-22-70
10-04-69
11-10-69
06-02-70
09-07-69
10-14-69
05-03-70
06-09-70

0.0 (
0.0 (
0.0 (
0.0 (
0.0 (
0.0 (
0.0 (
0.0 (
0.0 (
0.0 (
0.0
0.0 (
0.0
0.0
0.0
0.0
0.0
0.0
0.0(
0.0 (
0.0 (

0%) 0.0 0%) 36.6 (13~%)
0~) 0.0 ( 0%) 28.6 (20%)
0%) 0.0( 0%) 73.2 (12%)
0%) 0.0( 0~) 37.8 (11%)
0U) 0.0( 0%) 18.2 (26%)
0%) 0.0 ( 0) 64.2 (10%)
0%) 0.0( 0%`) 51.3 (11%)
0%) 0.0( 0%) 96.4( 8%)
0%) 0.0 ( 0%) 56.4 (16%)
0%)} 0.0 0%) 30.6 (17%)
0%) 0.0 0%) 111.3 ( 6%)
0%) 0.0 0%) 69.1 (23%)
0%) 0.0 0%) 57.4 ( 8Q)
0%) 0.0 0%) 70.8 ( 8%)
0%) 0.0( 0%) 47.9 ( 8%')
0%) 0.0 0) 15.4 (27%)
0%) 0.0 0%) 14.9 (13%)
0%) 0.0 0%) 56.8 (17%)
0%) 0.0 ( 0%) 27.5 (13%)
0%) 95.5 (82%) 52.4 (13%)
0%) 0.0 0%) 105.6 6%)

1. Ash weight.
2. Number in parentheses is percent error (two standard deviations) of total radioactivity content in ash.
3. Cesium-137 and Zinc-65 radioactivity were corrected for decay back to the date.
of collection. Gross beta radioactivity is given for the date of counting
(July-August 1970).
4. 0.0 (0%) signifies that the activity in the sample was less than minimum detectable
limit.

A-54