(A) Every person whose premises are served by a sewer connection and which discharges sanitary sewage, industrial wastes, water or other liquid, other than “normal strength sewage,” either directly or indirectly into the wastewater treatment system under the management of the city shall be charged and shall pay a wastewater treatment system surcharge in addition to the wastewater treatment system service charge.
(B) The surcharge shall be determined on the basis of any combination or all of three constituents of the wastewater:
(1) Total suspended solids (§ 51.002).
(2) BOD (§ 51.002).
(3) Kjeldahl nitrogen (§ 51.002).
(4) Grease from restaurants.
(C) When the concentrations of any one, any combination or all of these four constituents exceed the values for “normal strength sewage” (see § 51.002), the excess concentrations shall be subject to charges at a rate calculated from the following formula except for grease from restaurants, this surcharge will be based on actual cost of material and labor:
R = A(SS-300) + B(BOD-240) + C(TKN-30)
1,000,000
Wherein:
R = Surcharge rate in dollars per hundred cubic feet of wastewater flow.
SS = Suspended solids — See § 51.002.
BOD = Biochemical oxygen demand — See § 51.002.
TKN = Total kjeldahl nitrogen — See § 51.002.
300 = Maximum suspended solids in normal strength sewage.
240 = Maximum BOD in normal strength sewage.
30 = Maximum kjeldahl nitrogen in normal strength sewage.
A, B and C are numerical factors related to unit costs of providing primary and secondary treatment for the indicated pollutants. The values shall be:
A =
B = (Values to be furnished upon request)
C =
(Ord., passed 7-13-87)