§ 42-160. Excessive strength charges.

For any user, when the BOD exceeds 300 mg/l, or the suspended solids exceeds 300 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. This surcharge shall be calculated by the following formula:

Cs = (Bc(B) + Sc(S) + Pc(P))Vu

Where:

Cs = Surcharge for wastewaters of excessive strength

Bc = O&M cost for treatment of a unit of biochemical oxygen demand (BOD)

B = Concentration of BOD from a user above a base level

Sc = O&M cost for treatment of a unit of suspended solids (SS)

S = Concentration of SS from a user above a base level

Pc = O&M cost for treatment of a unit of any pollutant

P = Concentration of any pollutant from a user above a base level

Vu = Volume contribution from a user per unit of time

Based on Model No. 2, 40 CFR 35, appendix B.

(Code 1990, ch. 10, § 3(A)(3))