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

*'*st:***** LAKE MICHIGAN RADIOLOGICAL SURVEY *******
Table A-17 (Cont'd.)
RADIOACTIVITY IN WATER
1 2
SAMPLE SAMPLE WEIGHT1 COLLECTION ACTIVITY IN PCI/LITER (% ERROR)3
'STATION NUMBER (GRAMS) DATE CESIUM-137 ZINC-65 GROSS BETA'
F-5*** 10 0.3999 09-01-69 0.0 ( 0%) 0.0 ( 0%) 4.1 (14i)
F-5-* 18 0.3681 11-02-69 0.0 0 0%) 0.0 ( 0%) 2.7 (18%)
KE-. '' 11 0.4102 09-06-69 0.0 ( 0) 11.5 (60%) 3.1 (18%)
KEi:,-' 15 0.4424 11-04-69 0.0 ( 0%) 0.0 ( 0%) 5.9 (12%)
Ki:,'*:* 142 0.6440 05-22-70 0.0 ( 0%) 0.0 ( 0%) 3.3 (20%)
P~pL:*, 24 0.4085 10-04-69 4.5 (62%) 0.0 ( 0%) 3.3 (177%)
PAL'):'; 26 0.4108 11-10-69 0.0 ( 0) 0.0 ( 0%) 2.9 (19%)
PTB- 12 0.4849 09-07-69 0.0 0%) 0.0 ( 0%) 3.5 (17%)
PT**-* 148 0.6584 05-22-70 0.0 ( 0% 0;0 (O 0) 4.2 (16%)
ZI1)N44 32 0.5950 10-14-69 0 0.0 0% 00 0%) 2.8 (23%)
Z l()N**' 143 0.6578 05-03-70 0.0. 0%) 0.0 ( 0%) 3.8 (19%)
1, Weight of residue after evaporation
2. Number in parentheses is percent error (two standard deviations) of total
- radioactivity content in a-two liter sample. -- -. - -------- - --—......
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 the minimum
detectable limit. - - - -

A-41