(a) The following terms as used herein shall have the following meanings ascribed to them as shown:
(1) "Normal sewage" means sewage which, when analyzed, shows, by weight, a daily average of not more than 225 parts per million (ppm) of suspended solids; nor more than 185 ppm of B.O.D. and/or 250 ppm of C.O.D.; nor more than fifty ppm ammonia; nor more than eighty ppm ether-soluble matter (grease & oil); nor more than eight ppm phosphorus. These concentrations shall be used for determining surcharges.
(2) "Suspended solids" means solids that either float on the surface, or are in suspension in water, sewage or other liquids, and which are removable by laboratory filtering.
(3) "B.O.D. " (denoting biochemical oxygen demand) means the quantity of oxygen utilized in the biochemical oxidation of organic matter, under standard laboratory procedure, in five days at twenty-five degrees centigrade (25° C.), expressed in parts per million (ppm) by weight.
(4) "C.O.D. " (chemical oxygen demand) means the quantity of oxygen required to satisfy the carbon in a waste as determined by chemical oxidation of the waste with a strong oxidation agent (acid solution) expressed in milligrams per liter (mg/l).
(5) "Phosphorus" means a constituent in wastewater identified in "Standard Methods for Examination of Water and Wastewater".
(6) "Oil and grease".
(b) All sewage or industrial wastes above normal sewage strength, but acceptable for discharge into the sanitary sewerage system, shall be subject to surcharge. The surcharge shall be determined on the basis of any or all of the constituents of the water or wastes:
(1) Total suspended solids; and/or
(2) Five day B.O.D. at twenty degrees centigrade (20° C.) and as herein provided; and/or
(3) C.O.D.; and/or
(4) Phosphorus; and/or
(5) Oil and grease.
(Ord. 1984-263. Passed 12-18-84.)
(c) When the total suspended solids, C.B.O.D., C.O.D., phosphorus and/or oil and grease of a water or waste accepted for admission to the system exceeds the values of their constituents for normal sewage, the excess concentration in any or all, as the case may be, shall be subject to a surcharge as follows:
(1) Pounds of excess suspended solids per day x $0.44 per lb. = S.S. surcharge.
(2) Pounds of excess C.B.O.D. per day x $0.47 per lb. = C.B.O.D. surcharge.
(3) Pounds of excess C.O.D. per day x $0.22 per lb. = C.O.D. surcharge.
(4) Pounds of excess phosphorus per day x $0.73 per lb. = phosphorus surcharge.
(5) Pounds of excess oil and grease per day x $0.44 per lb. = oil and grease surcharge.
In addition to the above surcharges, the City shall have the right to surcharge any user for the discharge of any other pollutant into the sewerage system.
(Ord. 2023-34. Passed 3-7-23; Ord. 2023-40. Passed 3-21-23.)