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total phosphorus loading from the stream which feeds the Rutledge Canal is small in comparison to other contributors to Lake Istokpoga, it remains a curious activity.

Figure 2: Lake Istokpoga - Total Phosphorus levels in 4 Residential Canals

600

Palms Estates 4

Istok Shores South 12

Rutledge 28

Elliott East 36

Avg of all res. canals

500

400

TP (ug/L)

300

200

100

0

April 2005

June 2005

Aug 2005

Nov 2005

Dec 2005

Feb 2006

Further investigation of these unusual results included collecting water quality samples within the stream that contributes flow to the canal. There has been no single source of water identified and no unusual activities occurring upstream that would explain the unique chemistry. It has not been proven that the chemical activity within this canal contributes substantially to Lake Istokpoga’s overall health, but it may have localized impact to vegetation and fish.

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NOTES

Session 2 – Page 5

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