A test bottle containing just seeded dilution water has its DO level drop by 1.0 mg/L in a five day test. A 200 mL BOD bottle filled with a 15 mL of wastewater and the rest seeded dilution water (sometimes expressed as a dilution of 1:20) experiences a drop of 8.20 mg/L in the same time period. What is the five-day BOD of wastewater? a. 135 mg/L b. 97 mg/L           c. 125 mg/L         d. None of these              e. 84 mg/L

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