The population of a 10 ha catchment area is 25,000; if the average wastewater flow is180 l/capita.d. Infiltration is 10% of the domestic wastewater flow rate and the average industrial flow is 2 l/s. a) Determine the DWF and the CSO setting according to 6DWF and Formula A b) If a River water quality adjacent to the overflow limited to a BOD5 of 15 mg/l for the 1-year return period, 20minute duration event, determine the setting required to meet this environmental regulation for the following additional information: Rainfall intensity for the 1 year, 20 minute event, i = 20 mm/h River flow upstream of CSO = 1 m3 /s, with BOD5 of 2 mg/l Overflow BOD5 = 500 mg/l