Figure 2. Title: Comparison of predicted glutaraldehyde concentrations at Duluth Harbor. The y axis = Predicted Glutaraldehyde concentration (mg/L). The x axis = Julian day (start April, day 91). Dilution concentrations of 10, 50, and 100 mg/L are plotted for a worst case scenario (reballasting at Windsor) and a best case scenario (reballasting at Oswego).