"Biochemical oxygen demand (BOD)" means the quantity of oxygen utilized in the biochemical oxidation of organic matter under standard laboratory procedures for five (5) days at twenty degrees centigrade (20°C), usually expressed as concentration (e.g., milligrams per liter [mg/l]). Laboratory determinations shall be made in accordance with methods set forth in 40 CFR 136 or its successor. (Ord. 68-11, 2011)