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F. Notes and Visual Observations <br />During the course of the pilot study, several observations were made regarding color <br />of the wastewater, leachate, and the effluent. Directly downstream of where the <br />leachate was discharged are two large anaerobic basins. Typically, the wastewater is <br />gray in color. However, when leachate was being fed into the treatment facility, it <br />turned the wastewater a dark brown or black. This was visually evident in the <br />anaerobic basins. The anaerobic basins discharged into the aeration basins, but there <br />was no change in color in the large aeration basins. <br />As the leachate was delivered daily, it was observed that the color would change <br />depending on the day. This could be due to age of the leachate and where it was <br />collected from in the landfill. Some days it was very black and had a strong odor <br />while other days it was browner in color and had less odor. <br />G. WWTF Capacity Evaluation <br />The following Table 3.3 shows the available, and remaining capacity at the City's <br />WWTF if the City accepts the leachate from Waste Management. <br />bw Table <br />3.3: Elk River's WWTF <br />Capacity <br />City's <br />Waste <br />Approximate <br />Parameter <br />Design <br />Current <br />Management <br />Remaining <br />Future <br />Value <br />Usage <br />Requested <br />Available <br />Population <br />Remaining <br />AWW Flow, MGD <br />4.54 <br />1.34 <br />0.35 <br />2.85 <br />CBOD5, Lbs/d <br />10,899 <br />2193.8 <br />776.0 <br />7929.2 <br />28,600 <br />TSS, Lbs/d <br />9,990 <br />3541.5 <br />146.0 <br />6302.5 <br />Phosphorous, Lbs/d <br />j 273 <br />69.4 <br />j 3.0 <br />j 200.6 <br />Prepared by: Bolton & Menk, Inc. Results and Discussion <br />Waste Management/Elk River Leachate Pilot Study I T21.109643 Page 16 <br />