A residential development is expanding in Tafton, PA, and a small wastewater treatment plant is in design. You, a local engineer, have been asked to evaluate some of the alternatives for the proposed design and help complete the design. Activated Sludge Tank - wastewater enters an activated sludge tank with a BOD5 = 220 mg/L and a flow of 1 MGD. The proposed reactor has dimensions of 60ft wide, 120ft long and 6ft deep. The OLR values (per unit volume/day) for a conventional activated sludge reactor are: 0.019 - 0.037 lbm/ft3 -day. Required: Evaluate the OLR values for a conventional activated sludge reactor. Calculate the OLR for the system. If the proposed design is not within the range, recommend changes to the proposed dimensions. (3 points) Aeration Basin The municipality serves a population of 30,000 people with a per capita wastewater flow of 120 gal/day and BOD contribution of 0.20 lbm/day. 35% of the BOD was removed during primary treatment. The typical average overflow rate with an influent flow rate greater than 1 MGD is qo = 800 gpd/ft2 . There will be two clarifiers. (Reminder: When determining the diameter, split the total surface area between two equally sized