(A) Any person discharging other than normal sewage or industrial waste shall pay a monthly surcharge to the city, which charge shall be in addition to monthly sewer service charges. Computations of surcharges shall be based on the following formula:
C =DX ( (BA - BN) + (SA - SN) ) x F x V
Where:
(1) C = Surcharge to user in dollars to be added to monthly billing for water and sewer services.
(2) D = Unit cost of treatment = $0.092;
(3) BA = B.O.D. of the discharge;
(4) BN = "Normal" B.O.D. (225 mg/l);
(5) SA = Total suspended solids of the solids (250 mg/l);
(6) SN = "Normal" suspended solids of the solids;
(7) F = Factor converting mg/l to pounds/gallon (8.345); and
(8) V = Monthly volume in million gallons.
(B) (1) A person determined to be discharging waste in violation of §§ 90.133 through 90.139 above, other than excessive B.O.D. or suspended solids, shall compensate the city for the cost of sampling and laboratory service expense required for monitoring the discharges until such time as the discharged waste is in compliance with §§ 90.133 through 90.139 above.
(2) The approving authority shall determine the number of samples and the frequency of sampling necessary to maintain surveillance of the discharges.
(C) A person discharging concentrations for B.O.D. and suspended solids in excess of normal domestic wastewater concentrations shall compensate the city for the cost of sample collections and laboratory service necessary when an industrial waste surcharge rate is established each year.
(1985 Code, § 11-817)