921.72 SURCHARGE.

   All persons discharging approved wastewater into the public sanitary sewers as determined under the provisions of this Chapter shall be subject to surcharges as set forth in Ashland City Sections 923.05 and 923.06, determined monthly solely on the basis of the following formula:

   P = (A) x BOD + (B) x SS

   Where:

   P =       monthly surcharge

BOD =    pounds of biochemical oxygen demand per month in excess of the specified user class mg/1 concentration in the wastewater.

    SS =       pounds of suspended solids per month in excess of the specified user class mg/1 concentration in the wastewater.

   In the above formula, A and B refer to the total expenditures per pound of BOD and suspended solids, respectively, to collect, convey and treat the wastewater. This information shall be supplied by the Engineer or Director.