§ 52.222  EXCESSIVE STRENGTH CHARGES.
   (A)   For any user, when the BOD exceeds 250 mg/l, the suspended solids exceeds 250 mg/l, or when other pollutant concentrations exceed the range of concentrations of these pollutants in normal domestic sewage, a surcharge shall be added to the basic charge.
   (B)   This surcharge shall be calculated by the following formula:
   C s = [Bc(B) + Sc(S) = Pc(P)]Vu
   (Based on Model 2, 40 CFR 25, Appendix B)
   Symbols and definitions:
   C c =   A surcharge for wastewaters of excessive strength.
   B c =   O & M cost for treatment of a unit of biochemical oxygen demand (BOD).
   B  =   Concentration of BOD from a user above a base level.
   S c =   O & M cost for treatment of a unit of suspended solids (SS).
   S  =   Concentration of SS from a user above a base level.
   P c =   O & M cost for treatment of a unit of any pollutant.
   P  =   Concentration of any pollutant from a user above a base level.
   V u =   Volume contribution from a user per unit of time.
(`83 Code, § 17-427)  (Ord. 87-17, passed 9-8-87)