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

********** LAKE MICHIGAN RADIOLOGICAL SURVEY..**********
Table A-20 (Cont'd.)
RADIOACTIVITY IN SEDIMENT
Arranged by Increasing Depth of Sampling

SAMPLE SAMPLE TYPE SAMPLE ACTIVITY IN
STATION DEPTH OF PICOCURIES PER GRAM (PERCENT ERROR)1'2
NUMBER (FEET) SAMPLE CESIUM-137 POTASSIUM-40 RADIUM-2263

209 A-5*** 132 GRAVEL 0.52 (20%)
186 A-5*** 132 SAND 1.12 (12%)
243 A-5*** 132 GRAVEL 1.29 (12%)
201. F-30*** 150..SI.. LT 0.43 ( 21%)
284 F-3*** 150 SAND 1.34 (10%)
260 B-2*** 150 CLAY 0.31 (18%)
155 F-3*** 150 SILT 0.42 (1813%)
271 B-2*-* 150 CLAY 1.53 (24%)
213 C-7*** 162 SAND 1.36 (10%)
185 C-7*** 162 S.ILT 0.96 (14%)
244 C-7*** 162 SILT 1.05 (14%)
191 EF-4** 170 SAND 0.99 (14%)
200 F-2*** 170 CLAY 0.66 (22%)
267 F-2*** 170 SAND 2.80 (12%)
256 C-2*** 170 CLAY 6.18 ( 8%)

10.29 (14%) 2.32 (16%)
8.48 (16%) 1.03 (20%)
9.76 (18%) 0.98 (24%)
___ 5.82 (26%)__ 0.69 (30%)
9.29 (14%) 0.66 (24%)
19.22 (16%) 2.29 (18%)
5.12 (18%) 0.45 (26%)
18.01 (22%) 1.87 (30%)
9.07 (16%) 0.95 (20%)
9.21 (16%) 1.05 (20%
8.61 (18%) 1.01 (22%)
9.79 (18%) 1.36 (20%)
8.16 (22%) 0.55 (38%)
11.31 (20%) 2.11 (20%)
15.43 (20%) 2.03 (24%)

152 F-2***,,170..SILT 1.02 (10%)._7.36 (14%) _ 0.64.22% L_

160 EF-4** 170

CLAY 1.00 (14%)

258 C-2*** 170 CLAY 4.17 (10%)
189 B-7'** 175 SILT 1.91 (10%)
190 EF-2** 180 SAND 0.62 (14%)
153 EF-2** 180 SILT 0.84 (18%)
279 EF-2** 180 SILT 1.55 (10%)
188 CD-6** 190 SAND 0.73 (14%)
165 CD-6** 190 SILT 0.79 (14%)
231 CD-6** 190 SAND 1.30 (12%)
173 CD-4** 200 SILT 0.49 (12%)
219 A-3*** 200 CLAY 0.29 (48%)
270 B-3 *** 200..CLAY_ 1.37 (30%) __
233 CD-4** 200 SILT 1.33 (12%)
255 B-3*4* 200 CLAY 2.20 (12%)
170 CD-4** 200 SILT 1.16 (16%)
249 B-7'.* 200 CLAY 0.99 (12%)
248 A-3:** 200 CLAY 8.07 ( 8%)
204 BRK.** 210 SAND 1.50 (12%)
174 RRK*** 210 SILT 1.21 (10%)

9.49
14.70
9.79
12.31
8.27
9.36
12.27
12.22
12.77
6.91
16.95
25.59
17.44
19.78
14.78
10.55
17.19
10.73
10.74

(18%)
(22%)
(18%)
(12%)
(20%)
(14%)
(14%)
(14%)
(16%)
( 14%)
(14%)
(16%)
( 16%)
( 16%)
( 18%)
( 18%)
(14%)

1.37 (20%)
2.17 (22%)
1.14 (22%)
0.66 (22%)
0.75 (28%)
0.64 (26%)
0.90 (20%)
0.84 (20%)
0.85 (26%)
0.48 (22%)
2.05 (18%)
___2.64 (26%)
1.24 (22%)
2.41 20%)
1.68 (20%)
0.93 (22%)
1.90 (26%)
1.40 (20%)
1.02 (18%)

A-48