(a) The surcharge for extra strength waste shall be based on the applicable constituents of the waste water as follows:
(1) B.O.D., five days at 20º C.; and
(2) Total suspended solids.
(b) Whenever the wastes are ruled acceptable for waste water treatment and the waste water contains B.O.D. and/or suspended solids in excess of normal sewage, the excess shall be subject to a surcharge derived in accordance with the following formula:
SC = [(SS-280) x F x 8.34 x Cs] +
[(BOD-240 x F x 8.34 x Cb] = F x 8.34 x
[(SS-280) Cs + (BOD-240) Cb]
Where:
SC = Total surcharge based on average daily flow
SS = Total suspended solids in wastes as discharged in milligrams per liter
280 = Suspended solids concentration in normal sewage in milligrams per liter
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
BOD = Total B.O.D. in wastes as discharged in milligrams per liter
240 = B.O.D. concentration in normal sewage in milligrams per liter
Cb = Cost to treat one pound of B.O.D. in cents per pound per day.
(`80 Code, § 1036.02) (Ord. 1584, passed 10-18-82)