Fecal-Coliform Bacterial Concentrations
             On March 3rd our lab assignment was to walk to Tanyard Creek, located near the Tate Center parking lot, on the campus of the University of Georgia. We took measured many water quality parameters at or near base flow; conductivity, dissolved oxygen, phosphate, nitrate and silica, pH, alkalinity and turbidity. Samples were taken at both low and high flow conditions to measure the total amount of fecal-coliform bacteria in the stream and the Biochemical Oxygen Demand of the water. This data will comprise the main thrust of this report.
             All measurements of water quality were taken directly in the field, except for the Biochemical Oxygen Demand (BOD) and fecal-coliform bacteria counts. Dr. Wenner and myself took the first samples at low flow, then Liz Purvis, Rebecca Turner and I took the second set of samples at high flow the following Tuesday. These were then taken to the University of Georgia Cooperative Extension Service Water Quality Laboratory to be analyzed for the presence and concentration of fecal-coliform bacteria. For the rest of the tests the class was divided into groups of 3 and the tasks were distributed among them and rotated so that every group had a chance to use each type of instrument. I worked with Peter Grieco and Chris O'Brien.
             Measurements of conductivity were taken using a Hanna Instruments Hi 9033 Multi-Range Conductivity Meter (Table 2). Five readings were taken. Measurements of dissolved oxygen were taken by three different methods (Table1). The first was by use of an YSI model 95 Dissolved Oxygen Meter. The second was by use of a Lamotte Dissolved Oxygen Kit, and third was made using a Hach DR/890 Colorimeter. Using an Orion model 250A, three measurements of pH were taken for the stream. Turbidity was measured using a Hach 2100P Turbidity meter and T-alkalinity us
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