Mass balance on a stream receiving waste. (+3.5 total) Let's revisit the BOD problem from the first homework. Instead of running a BOD5 experiment, an operator from the wastewater treatment plant provides you with the BOD5 and flowrate of the wastewater that spilled into the stream (BODWW =184.4 mg/L; Qww = 500 L/s). You find records that show the BOD5 and flowrate of the stream during normal conditions (BODS = 0.8 mg/L; Qs = 1000 L/s). Using this information, determine the BOD5 of the stream after the spill event, assuming steady state and no reaction. Begin by drawing and labeling a diagram of the system. (Answer: BOD5= 62 mg/L).