As shown in Table 2.6, the BOD5 daily average, peak day, and peak 4-h period valueswere all far in excess of the plant design basis. While the design average and peak dayvalues were exceeded by approximately 200%, the 4-h peak BOD5 loading was exceededby approximately 500%. These excessive loads necessitated additional aeration capacity inthe plant. Additional aeration capacity enabled an average BOD5 removal of 40,398 lb/d froma plant that was originally designed to remove 14,312 lb/d.
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