(a) There is hereby charged to each lot, parcel of land, building or premises discharging sewage, industrial waste, water or other liquids other than normal sewage either into the Metropolitan Sewerage System, into a stream, or in a manner contrary to law, the surcharge established herein, in addition to the charge now or hereafter fixed for normal sewage.
(b) The basis of the surcharge shall be determined on either or both, of two constituents of the water or wastes:
(1) Total suspended solids, and
(2) B.O.D., five days at twenty degrees centigrade and as herein provided.
(c) When either or both the total suspended solids and B.O.D. of a water or waste accepted for admission to the City sewage works exceeds the values of these constituents for normal sewage, the excess concentration in either or both, as the case may be, shall be evaluated volumetrically in terms of normal sewage and be subject to surcharge on the volume derived in accordance with the following formula:
Sv = (Sw-2500) x 0.65 x F x 133,690 + | (Bw-2000) x 0.65 x F x 133,690 |
2500 | 2000 |
which reduced to its simplest form is:
Sv = F ((Sw-2500) 35 + (Bw-2000) 43). |
where Sv is the derived volume of wastes in cubic feet subject to surcharge.
Sw - the pounds per million gallons of suspended solids in the wastes as discharged.
2,500 - the pounds per million gallons of suspended solids in the normal sewage.
Bw - the pounds per million gallons of B.O.D. in the wastes as discharged.
2,000 - the pounds per million gallons of B.O.D. in normal sewage.
0.65 - Factor allowance for 65 percent degree of purification.
Present B.O.D. requirement for Cincinnati Pool established by Ohio River Valley Water Sanitation Commission.
F - the flow expressed in million gallons of the wastes as discharged.
133,690 - Factor to convert million gallons to cubic feet.
(d) The equivalent volume of normal sewage as derived from the excess above the normal strength of any water and wastes shall be subject to a surcharge for the volume of equivalent normal sewage as computed from the formula, at a flat rate of three cents (3¢) for each 100 cubic feet, as above computed.
(Ord. 6-1953. Passed 4-27-53.)