ONEKAMA JUNIOR/SENIOR HIGH SCHOOL SCIENCE

Portage Lake Water Analysis Tests

October 20, 1993

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SECCHI DISK: West Basin 12' East Basin 14' Shallow Site 10.5' (bottom)

CHLOROPHYLL a: West Basin 6.09 East Basin 5.82 Shallow Site 3.66

(ug/l)*

PHOSPHORUS: West Basin......... East Basin.......... Shallow Site

(ug/l) Surface............. 6.7...................... 10.03....................... 7.1

...........30 ft. .................7.6 .......................7.7...............(10 ft.) 9.3

...........55 ft. .................7.3 .......................7.5........................... --

...........Dissolved Oxygen .....Temperature.......Alkalinity

...................West Basin....................East Basin..............Shallow Site

  D.O. TEMP PH   D.O. TEMP PH   DO TEMP PH
Surface 10.0 10 8.15   9.5 10 8.2   10.6 11 8.3
15 ft. 10.0 11 8.1   8.8 11 8.6   10.0 12 8.4
20 ft. 9.4 11 8.2   8.8 11 8.5   -- -- --
25 ft. 9.5 11 8.2   10.0 11 8.5   -- -- --
30 ft. 10.0 11 8.2   9.2 11 8.6   -- -- --
35 ft. 10.0 11 8.2   9.0 11 8.4   -- -- --
40 ft. 9.5 11 8.2   10.0 11 8.5   -- -- --
45 ft. 9.8 11 8.2   9.8 11 8.2   -- -- --
50 ft. 9.9 11 8.2   -- -- --   -- -- --
55 ft. -- -- --   -- -- --   -- -- --
                       
                       
                       

* parts per billion

-- not taken