The following comprise the list of conventional pollutants designated pursuant to section 304(a)(4) of the Act:

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1. Biochemical oxygen demand (BOD)2. Total suspended solids (nonfilterable) (TSS)3. pH4. Fecal coliform5. Oil and grease[44 FR 44503, July 30, 1979; 44 FR 52685, Sept. 10, 1979]