The standard strengths for BOD and suspended solids, as shown in § 51.80, shall be subtracted from the strengths measured by appropriate sampling to determine the extra strengths of each industrial class user for each strength surcharge billing period. These results shall be used to determine the weight in pounds for BOD and suspended solids to be charged for strength surcharge. The extra strengths shall be determined by the wastewater treatment plant from tests by the city or such other tests as may be approved by the city.
(‘97 Code, § 51.62) (Ord. 35-84, passed 8-20-84; Am. Ord. 54-91, passed 11-18-91; Am. Ord. 21-12, passed 10-16-12; Am. Ord. 10-22, passed 11-1-22)