It's the spills sent untreated wastewater into Limestone Creek,a tributary of Lake Lanier, and the lake, itself.
The incidents occurred on Aug. 3 and April 21.
In the first case, 18,000-24,000 gallons of sewage overflowed because of grease clogging a line near Brenau Lake between Enota Drive and Lakeview Drive.
In the second, about 1,200 gallons escaped after a contractor failed to completely close a valve while replace a pump at pump station on Thompson Bridge Road.
http://accesswdun.com/article/2010/1/226224