Design an extended aeration package plant (prefabricated or pre-engineered) to treat a municipal wastewater flow of 125,000 L/d (33,000 gal/d). Solids retention typically ranges from 20 to 30 days; MLSS varies between 3,000 and 6,000 mg/L. The Food to Microorganism ratio (F/M) typically varies between 0.05 to 0.30. Influent BOD and TSS will generally be about 250 mg/L. The dissolved oxygen (DO) concentration is in the 1.5 to 2.5 mg/L range and preferably will never be below 2.0 mg/L. Coarse bubble aerators will be used. Detention time in the aeration tank will be one day. (40 points)