Determination of Biochemical Oxygen Demand (BOD5)
2. Determine the DO of the two dilution water blanks and all sample bottles and record on data sheet as Initial DO. 3. Place the samples and the 2 dilution water blanks in a 20 ( 1(C incubator for 5 days. Fill water seals with dilution water and cap to reduce evaporation from seals. Check daily, add water to seals if necessary. ................
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