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

..':'-: _LAKE PICHIGAN RADIOLOGICAL SURVEY. ***444?*-...
Table A-28 (cont.)
RADIOACTIVITY IN BENTHOS
(WET WEIGHT)
1
SAFPLE SAMPLE hEIGHT COLLECTICN ACTIVI'TY IN PCI/GRAM (% ERROR)
STATIUN NUMBER (GRAMS) DATE CESIUM-137 ZINC-65 GROSS BETP'3
38 11.1i 09-07-69 0.0 ( 0%) 0.. 0 0%) 1.1 (10%)
6?- 31- 50 1 1 —05-(9 0.0 (40%) 0.0 I0%) 1. 3
D) -::: 13.00 05 - 23 - 7 0 0.0 f 0) 0. ( ) 2.4 4 %
1 _, i.93 C 225- 69 _ 0.0 _( 0) 0..0. ( O), 1.0 30'
E5 28 ~ 00 10 -.30- 69 0.1 347) 0.0 C 0') 2.4 4 2%
E-2: 287 5'5.80 05-1 5-70 0.1 (62%2) 0.0 0%) 4.4 3.%
[ — 304 136.30 05-16-70 0.2 30% 0.2 (50%) 4.3 2
E F-2- 43 0.90 0,-26-69 0.0,0,' 20.0 68%) 13.5 (11;
EF-2 48 35.80 10-31-69 0.0 O 0.0 0%) 1.4 4,%
LEF:- 2 ' 297 34.85 053-16-7C 0.0 0% 0.0 0 2.5 Zi
EF-4 39 11,1709-02-69 0.0 0 0.0 ( 0.). 2 ( 1O
(4,2 0.60 09-01-69 0.0 0%) 0. O I % 1. 4 112%)
61 177.10 11 —02-69 0.1 22,) 0.0 ()0) 4.6 1%:
F-5: 30.1 13. 30 0!5-19-70 0.1 (68 8 0.0 0%) 2.9 9 2)
if 6 23 77 10-04-69 0.0 0~, 0.7 74:) 0.1 33%
P T L~ 3:' ~:':~7 2 O) 9 5 (: g- 0 7 - 6 9 0.0 0 ~0 ) 0 % ) 2.2 6
Z~ I r, ~
47 3.51 10-14-69 0.0 10,) 0.0 O,0) 2 ( 5 )
ZILNt:: 292 8.45 O')-03 —70 0.1 (74 4 0.2 (84',) 3.3 2%)
Z I CN;'-' 308 265.60 0,-09-70 0.1 (285) 0.1 I4%) 2 8 2%
1. Number in parentheses is percent error (two standard deviations) of total radioactivity
cont,:nt of sample.
2. Cesium-137 and Zinc-65 radioactivity were corrected back to the date of collection'
Gross beta radioactivity is given for the date of. counting (July-August 1.970)...
3. 0.0 (0%) signifies that the activity in the sample was less than the minimum detectable
1 i mit.

A-64