915.705 SURCHARGE FORMULA.
   (a)   The surcharge shall be based on four constituents of the water or wastes applicable:
      (1)   Total Suspended Solids
      (2)   BOD
      (3)   COD
      (4)    Phosphorus
   (b) Whenever the wastes are ruled acceptable to wastewater treatment and the wastewater contains suspended solids, BOD, and/or COD, or phosphorus in excess of "normal sewage", the excess shall be subjected to surcharge derived in accordance with the following formulae:
      (1)   SCS = (TSS-280) x F X 8.34 x CS
         SCS   =    Surcharge due to total suspended solids.
         TSS   =    Total suspended solids in wastes as discharged in mg/1
         280   =    Suspended solids concentration in "normal sewage" in mg/1
         F   =    Flow in millions of gallons per day of wastes as discharged.
         CS   =   Cost to treat one pound of suspended solids in cents per day per pound.
      (2)   SCB = (BOD-240) x F x 8.34 x CB
         SCB   =    Surcharge due to excess BOD
         BOD   =    Total BOD in wastes as discharged in mg/1.
         240   =    BOD concentration in "normal sewage" in mg/1.
         CB   =    Cost to treat one pound of BOD in cents per pound per day.
         Or
         SCC =    (COD-500) x F x 8.34 x CC
       SCC   =    Surcharge due to excess COD
         COD   =    Total COD in wastes as discharged in mg/1.
         500    =    COD concentration in "normal sewage" in mg/1.
         CC    =    Cost to treat one pound of COD in cents per pound per day.
      (3)   SCP = (P-8) X 8.34 X F X CP
         SCP   =    Surcharge due to excess phosphorus.
         P    =    Total phosphorus in wastes as discharged in mg/1.
         8    =    Total phosphorus concentration in "normal sewage" in mg/1.
         F    =    Flow in millions of gallons per day.
         CP   =    Cost to treat one pound of phosphorus in cents per pound per day.
(Ord. 30-14. Passed 3-3-14.)