Question: 2. The selected dilution for BOD5 test should be such that the residual DO is at least 1 mg/L, and DO depletion should be at

2. The selected dilution for BOD5 test should be such that the residual DO is at least 1 mg/L, and DO depletion should be at least 2 mg/L. Assuming initial DO of 8.6 mg/L, calculate the range of BOD5 that can be measured by a dilution of 1 mL sample in a 300-mL BOD bottle. [4 marks]

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