(A) A surcharge may be applied in addition to the monthly sewer service charge for the discharge of wastewater with concentrations of either BOD or TSS concentrations exceeding that of “normal domestic sewage,” to cover the additional costs of treating such wastewater. Such a charge is collected by the city.
(B) The surcharge shall be calculated as follows:
C = [B(Bu-250) + S (Su-250)] x F x V
Where:
C = surcharge to the user in dollars
B = unit cost factor for treating one unit of BOD (per 1,000 gallons)
Bu = the tested BOD of the discharge
S = unit cost factor for treating one unit of TSS (per 1,000 gallons)
Su = the tested TSS of the discharge
F = a factor of 8.34 to convert mg/L to pounds/ gallon
V = monthly billing volume (discharge) in thousand gallons
(C) If the concentration of BOD or TSS in the discharge is less than the normal strength for that category above specified, there shall be no surcharge for that category, nor shall there be credit given to the total surcharge if the concentration of either BOD or TSS is less than the normal concentration.
(D) All BOD and TSS values used in determining the surcharge shall be re-evaluated and adjusted to reflect any changes in wastewater characteristics as sampling results indicate necessary.
(Ord. 160726-A, passed 7-26-2016)