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

Table A-7

Lake Michigan tributaries-1963.

Average Gross

Alpha Radioactivity in 10-9 uCi/mi14)

RIVER
Sheboygan
Manitowoc
Branch
Duck Creek
Oconto
Peshtigo
Menominee
Ford
Escanaba
Rapid
Whitefish
Manistique
Black
Boardman
Manistee
Little Manistee
Big Sable
Pere Marquette
White
Muskegon
Grand
Kalamazoo
St. Joseph
Burns Ditch

Spring Summer
TS a TS a
<1
<1 <1
<1 <1
1.6 <1
<1
<1
<1
<1 <1
<1 <1
<1 <1
<1
1.2
<1 <1
3;5 3.9
<1 <1
7.8 3.6
47 1.3
5.0 4.9
1.7 18
45 22
2.8 <1
<1 <1
<1 <1

Fall
TS a
<1
<1
<1
1.8
<1
<1
<1
<1
<1
<1
<1
2.0
1.2
26
11
5.9
1.8
3.9
<1
<1
<1

Winter Avg
TS a *SS a
<1
<1 <1
<1 <1
1.3 <1
<1 — <1
<1
<1
<1 <1
(1 <1
<1
<1
<1 <1
<1 <1
<.1 2.2
4.3 7.6
<1 3.7
5.1 16
1.9 4.4
6.8
< 1 18
< 1 <<1
<.1 <1
<1

Avg
DS c
<1
<1
<1
1.4
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1
<1

Avg
TS a
<1
<1
<1
1.4
<1
<1
<1
<1
<1
<1
<1
<1
2.2
7.6
3.9
16
4.4
7.2
18
<1
<1
<1

< 1 <1 -,I < 1 < 1 <1

TS = Total Solids
DS = Dissolved solids
SS = Suspended solids

A-16