A 5-day BOD test was conducted on a wastewater sample. 50 mL of wastewater sample was added and diluted with dilution water into a 300 mL BOD incubation bottle. The initial dissolved oxygen (DO) of the diluted sample was 6.8 mg/L, and the final DO after 5 days was 1.9 mg/L. The corresponding initial and final DO of the dilution water (blank) was 7.1 mg/L and 6.9 mg/L, respectively. Calculate the BOD5 and COD values of the wastewater sample, given the rate constant of BOD was 0.3/day. (Hint: L =
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