The standard strengths for biochemical oxygen demand, suspended solids and phosphorus, as shown in Section 1042.03, shall be subtracted from the average strengths, as determined in Section 1040.29(c), to determine the extra strengths of each industrial class user for each strength surcharge billing period. The extra strengths and the volume of sewage charged for the billing period shall then be used to determine the weight in pounds of biochemical oxygen demand (BOD), suspended solids (SS) and phosphorus (P) to be charged for strength surcharge. The BOD surcharge shall be based on pounds of BOD or 0.5 times the pounds of COD, whichever is greater.
(Ord. 80-55. Passed 12-3-80.)