(b) The surcharge rate shall be calculated annually for each user discharging wastewater with high level pollutant in accordance with the volumes and amounts established in Section 933.07 to be effective January 1 of each year.
(c) For each user determined to be discharging high levels of BOD, SS or other selected pollutants, an estimated annual discharge shall be determined for each pollutant listed herein. This discharge shall be that amount exceeding concentrations considered to be normal (e.g., 200 mg/1 BOD). The basis for this figure shall be samples taken at random from the users discharge at the discretion of the Superintendent, but at least annually.
(d) Determination of Surcharge.
Surcharge = (A
B
x Y
B
) + (A
S
x Y
S
) + (A
O
+Y
O
)
Where:
A
B
= Annual discharge of BOD by user in excess of normal level.
Y
B
= High level of BOD treatment cost per unit.
A
S
= Annual discharge of SS by user in excess of normal level.
Y
S
= High level SS treatment cost per unit.
A
O
= Annual discharge of other pollutants by user in excess of normal amounts.
Y
O
= High level treatment cost per unit of pollutant.
The total surcharge shall be divided by the number of billing periods per year and the result shall be added per bill to the user in question.
(Ord. 31-81. Passed 12-1-81.)