The Battle Ground Wastewater Treatment Plant discharges treated wastew ater into Salmon Creek (wastewater and river characteristics given below). The temperature and velocity downstream of the discharge is 18C and 2.5m/s, respectively. Saturation DO concentration at 18C is 9.5mg/L. kr@20C=0.41day1kd@20C=0.26day1 Determine: a. Ultimate BOD just downstream of the point of discharge (8 pts) b. Initial DO deficit, D0 (10 pts) c. Critical (minimum) DO concentration downstream from the discharge? (14 pts) d. Distance downstream that this critical DO occurs (6 pts) e. BOD remaining at the point of critical DO? (6 pts)