Figure P5.6 shows a plot of BOD remaining versus time for a sample of effluent taken from a wastewater treatment plant. 40 35 30 BOD remaining (mg/L) 25 20 15 10 5 0 1 2 3 5 6 7 8 9 10 11 Days (a) What is the ultimate BOD (Lo)? b) What is the five-day BOD? c) What is Ls? FIGURE P5.6

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